/*
* params.c - parameters
*
* This file is part of zsh, the Z shell.
*
* Copyright (c) 1992-1997 Paul Falstad
* All rights reserved.
*
* Permission is hereby granted, without written agreement and without
* license or royalty fees, to use, copy, modify, and distribute this
* software and to distribute modified versions of this software for any
* purpose, provided that the above copyright notice and the following
* two paragraphs appear in all copies of this software.
*
* In no event shall Paul Falstad or the Zsh Development Group be liable
* to any party for direct, indirect, special, incidental, or consequential
* damages arising out of the use of this software and its documentation,
* even if Paul Falstad and the Zsh Development Group have been advised of
* the possibility of such damage.
*
* Paul Falstad and the Zsh Development Group specifically disclaim any
* warranties, including, but not limited to, the implied warranties of
* merchantability and fitness for a particular purpose. The software
* provided hereunder is on an "as is" basis, and Paul Falstad and the
* Zsh Development Group have no obligation to provide maintenance,
* support, updates, enhancements, or modifications.
*
*/
#include "zsh.mdh"
#include "params.pro"
#include "version.h"
#ifdef CUSTOM_PATCHLEVEL
#define ZSH_PATCHLEVEL CUSTOM_PATCHLEVEL
#else
#include "patchlevel.h"
#include <math.h>
/* If removed from the ChangeLog for some reason */
#ifndef ZSH_PATCHLEVEL
#define ZSH_PATCHLEVEL "unknown"
#endif
#endif
/* What level of localness we are at.
*
* Hand-wavingly, this is incremented at every function call and decremented
* at every function return. See startparamscope().
*/
/**/
mod_export int locallevel;
/* Variables holding values of special parameters */
/**/
mod_export
char **pparams, /* $argv */
**cdpath, /* $cdpath */
**fpath, /* $fpath */
**mailpath, /* $mailpath */
**manpath, /* $manpath */
**psvar, /* $psvar */
**zsh_eval_context; /* $zsh_eval_context */
/**/
mod_export
char **path, /* $path */
**fignore; /* $fignore */
/**/
mod_export
char *argzero, /* $0 */
*posixzero, /* $0 */
*home, /* $HOME */
*nullcmd, /* $NULLCMD */
*oldpwd, /* $OLDPWD */
*zoptarg, /* $OPTARG */
*prompt, /* $PROMPT */
*prompt2, /* $PROMPT2 */
*prompt3, /* $PROMPT3 */
*prompt4, /* $PROMPT4 */
*readnullcmd, /* $READNULLCMD */
*rprompt, /* $RPROMPT */
*rprompt2, /* $RPROMPT2 */
*sprompt, /* $SPROMPT */
*wordchars; /* $WORDCHARS */
/**/
mod_export
char *ifs, /* $IFS */
*postedit, /* $POSTEDIT */
*term, /* $TERM */
*zsh_terminfo, /* $TERMINFO */
*zsh_terminfodirs, /* $TERMINFO_DIRS */
*ttystrname, /* $TTY */
*pwd; /* $PWD */
/**/
mod_export volatile zlong
lastval; /* $? */
/**/
mod_export zlong
mypid, /* $$ */
lastpid, /* $! */
zterm_columns, /* $COLUMNS */
zterm_lines, /* $LINES */
rprompt_indent, /* $ZLE_RPROMPT_INDENT */
ppid, /* $PPID */
zsh_subshell; /* $ZSH_SUBSHELL */
/* $FUNCNEST */
/**/
mod_export
zlong zsh_funcnest =
#ifdef MAX_FUNCTION_DEPTH
MAX_FUNCTION_DEPTH
#else
/* Disabled by default but can be enabled at run time */
-1
#endif
;
/**/
zlong lineno, /* $LINENO */
zoptind, /* $OPTIND */
shlvl; /* $SHLVL */
/* $histchars */
/**/
mod_export unsigned char bangchar;
/**/
unsigned char hatchar, hashchar;
/**/
unsigned char keyboardhackchar = '\0';
/* $SECONDS = now.tv_sec - shtimer.tv_sec
* + (now.tv_usec - shtimer.tv_usec) / 1000000.0
* (rounded to an integer if the parameter is not set to float) */
/**/
struct timeval shtimer;
/* 0 if this $TERM setup is usable, otherwise it contains TERM_* flags */
/**/
mod_export int termflags;
/* Forward declaration */
static void
rprompt_indent_unsetfn(Param pm, int exp);
/* Standard methods for get/set/unset pointers in parameters */
/**/
mod_export const struct gsu_scalar stdscalar_gsu =
{ strgetfn, strsetfn, stdunsetfn };
/**/
mod_export const struct gsu_scalar varscalar_gsu =
{ strvargetfn, strvarsetfn, stdunsetfn };
/**/
mod_export const struct gsu_scalar nullsetscalar_gsu =
{ strgetfn, nullstrsetfn, NULL };
/**/
mod_export const struct gsu_integer stdinteger_gsu =
{ intgetfn, intsetfn, stdunsetfn };
/**/
mod_export const struct gsu_integer varinteger_gsu =
{ intvargetfn, intvarsetfn, stdunsetfn };
/**/
mod_export const struct gsu_integer nullsetinteger_gsu =
{ intgetfn, NULL, NULL };
/**/
mod_export const struct gsu_float stdfloat_gsu =
{ floatgetfn, floatsetfn, stdunsetfn };
/**/
mod_export const struct gsu_array stdarray_gsu =
{ arrgetfn, arrsetfn, stdunsetfn };
/**/
mod_export const struct gsu_array vararray_gsu =
{ arrvargetfn, arrvarsetfn, stdunsetfn };
/**/
mod_export const struct gsu_hash stdhash_gsu =
{ hashgetfn, hashsetfn, stdunsetfn };
/**/
mod_export const struct gsu_hash nullsethash_gsu =
{ hashgetfn, nullsethashfn, nullunsetfn };
/**/
mod_export const struct gsu_scalar colonarr_gsu =
{ colonarrgetfn, colonarrsetfn, stdunsetfn };
/* Non standard methods (not exported) */
static const struct gsu_integer pound_gsu =
{ poundgetfn, nullintsetfn, stdunsetfn };
static const struct gsu_integer errno_gsu =
{ errnogetfn, errnosetfn, stdunsetfn };
static const struct gsu_integer gid_gsu =
{ gidgetfn, gidsetfn, stdunsetfn };
static const struct gsu_integer egid_gsu =
{ egidgetfn, egidsetfn, stdunsetfn };
static const struct gsu_integer histsize_gsu =
{ histsizegetfn, histsizesetfn, stdunsetfn };
static const struct gsu_integer random_gsu =
{ randomgetfn, randomsetfn, stdunsetfn };
static const struct gsu_integer savehist_gsu =
{ savehistsizegetfn, savehistsizesetfn, stdunsetfn };
static const struct gsu_integer intseconds_gsu =
{ intsecondsgetfn, intsecondssetfn, stdunsetfn };
static const struct gsu_float floatseconds_gsu =
{ floatsecondsgetfn, floatsecondssetfn, stdunsetfn };
static const struct gsu_integer uid_gsu =
{ uidgetfn, uidsetfn, stdunsetfn };
static const struct gsu_integer euid_gsu =
{ euidgetfn, euidsetfn, stdunsetfn };
static const struct gsu_integer ttyidle_gsu =
{ ttyidlegetfn, nullintsetfn, stdunsetfn };
static const struct gsu_scalar argzero_gsu =
{ argzerogetfn, argzerosetfn, nullunsetfn };
static const struct gsu_scalar username_gsu =
{ usernamegetfn, usernamesetfn, stdunsetfn };
static const struct gsu_scalar dash_gsu =
{ dashgetfn, nullstrsetfn, stdunsetfn };
static const struct gsu_scalar histchars_gsu =
{ histcharsgetfn, histcharssetfn, stdunsetfn };
static const struct gsu_scalar home_gsu =
{ homegetfn, homesetfn, stdunsetfn };
static const struct gsu_scalar term_gsu =
{ termgetfn, termsetfn, stdunsetfn };
static const struct gsu_scalar terminfo_gsu =
{ terminfogetfn, terminfosetfn, stdunsetfn };
static const struct gsu_scalar terminfodirs_gsu =
{ terminfodirsgetfn, terminfodirssetfn, stdunsetfn };
static const struct gsu_scalar wordchars_gsu =
{ wordcharsgetfn, wordcharssetfn, stdunsetfn };
static const struct gsu_scalar ifs_gsu =
{ ifsgetfn, ifssetfn, stdunsetfn };
static const struct gsu_scalar underscore_gsu =
{ underscoregetfn, nullstrsetfn, stdunsetfn };
static const struct gsu_scalar keyboard_hack_gsu =
{ keyboardhackgetfn, keyboardhacksetfn, stdunsetfn };
#ifdef USE_LOCALE
static const struct gsu_scalar lc_blah_gsu =
{ strgetfn, lcsetfn, stdunsetfn };
static const struct gsu_scalar lang_gsu =
{ strgetfn, langsetfn, stdunsetfn };
static const struct gsu_scalar lc_all_gsu =
{ strgetfn, lc_allsetfn, stdunsetfn };
#endif
static const struct gsu_integer varint_readonly_gsu =
{ intvargetfn, nullintsetfn, stdunsetfn };
static const struct gsu_integer zlevar_gsu =
{ intvargetfn, zlevarsetfn, stdunsetfn };
static const struct gsu_integer argc_gsu =
{ poundgetfn, nullintsetfn, stdunsetfn };
static const struct gsu_array pipestatus_gsu =
{ pipestatgetfn, pipestatsetfn, stdunsetfn };
static const struct gsu_integer rprompt_indent_gsu =
{ intvargetfn, zlevarsetfn, rprompt_indent_unsetfn };
/* Nodes for special parameters for parameter hash table */
#ifdef HAVE_UNION_INIT
# define BR(X) {X}
typedef struct param initparam;
#else
# define BR(X) X
typedef struct iparam {
struct hashnode *next;
char *nam; /* hash data */
int flags; /* PM_* flags (defined in zsh.h) */
void *value;
void *gsu; /* get/set/unset methods */
int base; /* output base */
int width; /* output field width */
char *env; /* location in environment, if exported */
char *ename; /* name of corresponding environment var */
Param old; /* old struct for use with local */
int level; /* if (old != NULL), level of localness */
} initparam;
#endif
static initparam special_params[] ={
#define GSU(X) BR((GsuScalar)(void *)(&(X)))
#define NULL_GSU BR((GsuScalar)(void *)NULL)
#define IPDEF1(A,B,C) {{NULL,A,PM_INTEGER|PM_SPECIAL|C},BR(NULL),GSU(B),10,0,NULL,NULL,NULL,0}
IPDEF1("#", pound_gsu, PM_READONLY_SPECIAL),
IPDEF1("ERRNO", errno_gsu, PM_UNSET),
IPDEF1("GID", gid_gsu, PM_DONTIMPORT | PM_RESTRICTED),
IPDEF1("EGID", egid_gsu, PM_DONTIMPORT | PM_RESTRICTED),
IPDEF1("HISTSIZE", histsize_gsu, PM_RESTRICTED),
IPDEF1("RANDOM", random_gsu, 0),
IPDEF1("SAVEHIST", savehist_gsu, PM_RESTRICTED),
IPDEF1("SECONDS", intseconds_gsu, 0),
IPDEF1("UID", uid_gsu, PM_DONTIMPORT | PM_RESTRICTED),
IPDEF1("EUID", euid_gsu, PM_DONTIMPORT | PM_RESTRICTED),
IPDEF1("TTYIDLE", ttyidle_gsu, PM_READONLY_SPECIAL),
#define IPDEF2(A,B,C) {{NULL,A,PM_SCALAR|PM_SPECIAL|C},BR(NULL),GSU(B),0,0,NULL,NULL,NULL,0}
IPDEF2("USERNAME", username_gsu, PM_DONTIMPORT|PM_RESTRICTED),
IPDEF2("-", dash_gsu, PM_READONLY_SPECIAL),
IPDEF2("histchars", histchars_gsu, PM_DONTIMPORT),
IPDEF2("HOME", home_gsu, PM_UNSET),
IPDEF2("TERM", term_gsu, PM_UNSET),
IPDEF2("TERMINFO", terminfo_gsu, PM_UNSET),
IPDEF2("TERMINFO_DIRS", terminfodirs_gsu, PM_UNSET),
IPDEF2("WORDCHARS", wordchars_gsu, 0),
IPDEF2("IFS", ifs_gsu, PM_DONTIMPORT | PM_RESTRICTED),
IPDEF2("_", underscore_gsu, PM_DONTIMPORT),
IPDEF2("KEYBOARD_HACK", keyboard_hack_gsu, PM_DONTIMPORT),
IPDEF2("0", argzero_gsu, 0),
#ifdef USE_LOCALE
# define LCIPDEF(name) IPDEF2(name, lc_blah_gsu, PM_UNSET)
IPDEF2("LANG", lang_gsu, PM_UNSET),
IPDEF2("LC_ALL", lc_all_gsu, PM_UNSET),
# ifdef LC_COLLATE
LCIPDEF("LC_COLLATE"),
# endif
# ifdef LC_CTYPE
LCIPDEF("LC_CTYPE"),
# endif
# ifdef LC_MESSAGES
LCIPDEF("LC_MESSAGES"),
# endif
# ifdef LC_NUMERIC
LCIPDEF("LC_NUMERIC"),
# endif
# ifdef LC_TIME
LCIPDEF("LC_TIME"),
# endif
#endif /* USE_LOCALE */
#define IPDEF4(A,B) {{NULL,A,PM_INTEGER|PM_READONLY_SPECIAL},BR((void *)B),GSU(varint_readonly_gsu),10,0,NULL,NULL,NULL,0}
IPDEF4("!", &lastpid),
IPDEF4("$", &mypid),
IPDEF4("?", &lastval),
IPDEF4("HISTCMD", &curhist),
IPDEF4("LINENO", &lineno),
IPDEF4("PPID", &ppid),
IPDEF4("ZSH_SUBSHELL", &zsh_subshell),
#define IPDEF5(A,B,F) {{NULL,A,PM_INTEGER|PM_SPECIAL},BR((void *)B),GSU(F),10,0,NULL,NULL,NULL,0}
#define IPDEF5U(A,B,F) {{NULL,A,PM_INTEGER|PM_SPECIAL|PM_UNSET},BR((void *)B),GSU(F),10,0,NULL,NULL,NULL,0}
IPDEF5("COLUMNS", &zterm_columns, zlevar_gsu),
IPDEF5("LINES", &zterm_lines, zlevar_gsu),
IPDEF5U("ZLE_RPROMPT_INDENT", &rprompt_indent, rprompt_indent_gsu),
IPDEF5("SHLVL", &shlvl, varinteger_gsu),
IPDEF5("FUNCNEST", &zsh_funcnest, varinteger_gsu),
/* Don't import internal integer status variables. */
#define IPDEF6(A,B,F) {{NULL,A,PM_INTEGER|PM_SPECIAL|PM_DONTIMPORT},BR((void *)B),GSU(F),10,0,NULL,NULL,NULL,0}
IPDEF6("OPTIND", &zoptind, varinteger_gsu),
IPDEF6("TRY_BLOCK_ERROR", &try_errflag, varinteger_gsu),
IPDEF6("TRY_BLOCK_INTERRUPT", &try_interrupt, varinteger_gsu),
#define IPDEF7(A,B) {{NULL,A,PM_SCALAR|PM_SPECIAL},BR((void *)B),GSU(varscalar_gsu),0,0,NULL,NULL,NULL,0}
#define IPDEF7R(A,B) {{NULL,A,PM_SCALAR|PM_SPECIAL|PM_DONTIMPORT_SUID},BR((void *)B),GSU(varscalar_gsu),0,0,NULL,NULL,NULL,0}
#define IPDEF7U(A,B) {{NULL,A,PM_SCALAR|PM_SPECIAL|PM_UNSET},BR((void *)B),GSU(varscalar_gsu),0,0,NULL,NULL,NULL,0}
IPDEF7("OPTARG", &zoptarg),
IPDEF7("NULLCMD", &nullcmd),
IPDEF7U("POSTEDIT", &postedit),
IPDEF7("READNULLCMD", &readnullcmd),
IPDEF7("PS1", &prompt),
IPDEF7U("RPS1", &rprompt),
IPDEF7U("RPROMPT", &rprompt),
IPDEF7("PS2", &prompt2),
IPDEF7U("RPS2", &rprompt2),
IPDEF7U("RPROMPT2", &rprompt2),
IPDEF7("PS3", &prompt3),
IPDEF7R("PS4", &prompt4),
IPDEF7("SPROMPT", &sprompt),
#define IPDEF9(A,B,C,D) {{NULL,A,D|PM_ARRAY|PM_SPECIAL|PM_DONTIMPORT},BR((void *)B),GSU(vararray_gsu),0,0,NULL,C,NULL,0}
IPDEF9("*", &pparams, NULL, PM_ARRAY|PM_READONLY_SPECIAL|PM_DONTIMPORT),
IPDEF9("@", &pparams, NULL, PM_ARRAY|PM_READONLY_SPECIAL|PM_DONTIMPORT),
/*
* This empty row indicates the end of parameters available in
* all emulations.
*/
{{NULL,NULL,0},BR(NULL),NULL_GSU,0,0,NULL,NULL,NULL,0},
#define IPDEF8(A,B,C,D) {{NULL,A,D|PM_SCALAR|PM_SPECIAL},BR((void *)B),GSU(colonarr_gsu),0,0,NULL,C,NULL,0}
IPDEF8("CDPATH", &cdpath, "cdpath", PM_TIED),
IPDEF8("FIGNORE", &fignore, "fignore", PM_TIED),
IPDEF8("FPATH", &fpath, "fpath", PM_TIED),
IPDEF8("MAILPATH", &mailpath, "mailpath", PM_TIED),
IPDEF8("PATH", &path, "path", PM_RESTRICTED|PM_TIED),
IPDEF8("PSVAR", &psvar, "psvar", PM_TIED),
IPDEF8("ZSH_EVAL_CONTEXT", &zsh_eval_context, "zsh_eval_context", PM_READONLY_SPECIAL|PM_TIED),
/* MODULE_PATH is not imported for security reasons */
IPDEF8("MODULE_PATH", &module_path, "module_path", PM_DONTIMPORT|PM_RESTRICTED|PM_TIED),
#define IPDEF10(A,B) {{NULL,A,PM_ARRAY|PM_SPECIAL},BR(NULL),GSU(B),10,0,NULL,NULL,NULL,0}
/*
* The following parameters are not available in sh/ksh compatibility *
* mode.
*/
/* All of these have sh compatible equivalents. */
IPDEF1("ARGC", argc_gsu, PM_READONLY_SPECIAL),
IPDEF2("HISTCHARS", histchars_gsu, PM_DONTIMPORT),
IPDEF4("status", &lastval),
IPDEF7("prompt", &prompt),
IPDEF7("PROMPT", &prompt),
IPDEF7("PROMPT2", &prompt2),
IPDEF7("PROMPT3", &prompt3),
IPDEF7("PROMPT4", &prompt4),
IPDEF8("MANPATH", &manpath, "manpath", PM_TIED),
IPDEF9("argv", &pparams, NULL, 0),
IPDEF9("fignore", &fignore, "FIGNORE", PM_TIED),
IPDEF9("cdpath", &cdpath, "CDPATH", PM_TIED),
IPDEF9("fpath", &fpath, "FPATH", PM_TIED),
IPDEF9("mailpath", &mailpath, "MAILPATH", PM_TIED),
IPDEF9("manpath", &manpath, "MANPATH", PM_TIED),
IPDEF9("psvar", &psvar, "PSVAR", PM_TIED),
IPDEF9("zsh_eval_context", &zsh_eval_context, "ZSH_EVAL_CONTEXT", PM_TIED|PM_READONLY_SPECIAL),
IPDEF9("module_path", &module_path, "MODULE_PATH", PM_TIED|PM_RESTRICTED),
IPDEF9("path", &path, "PATH", PM_TIED|PM_RESTRICTED),
/* These are known to zsh alone. */
IPDEF10("pipestatus", pipestatus_gsu),
{{NULL,NULL,0},BR(NULL),NULL_GSU,0,0,NULL,NULL,NULL,0},
};
/*
* Alternative versions of colon-separated path parameters for
* sh emulation. These don't link to the array versions.
*/
static initparam special_params_sh[] = {
IPDEF8("CDPATH", &cdpath, NULL, 0),
IPDEF8("FIGNORE", &fignore, NULL, 0),
IPDEF8("FPATH", &fpath, NULL, 0),
IPDEF8("MAILPATH", &mailpath, NULL, 0),
IPDEF8("PATH", &path, NULL, PM_RESTRICTED),
IPDEF8("PSVAR", &psvar, NULL, 0),
IPDEF8("ZSH_EVAL_CONTEXT", &zsh_eval_context, NULL, PM_READONLY_SPECIAL),
/* MODULE_PATH is not imported for security reasons */
IPDEF8("MODULE_PATH", &module_path, NULL, PM_DONTIMPORT|PM_RESTRICTED),
{{NULL,NULL,0},BR(NULL),NULL_GSU,0,0,NULL,NULL,NULL,0},
};
/*
* Special way of referring to the positional parameters. Unlike $*
* and $@, this is not readonly. This parameter is not directly
* visible in user space.
*/
static initparam argvparam_pm = IPDEF9("", &pparams, NULL, \
PM_ARRAY|PM_SPECIAL|PM_DONTIMPORT);
#undef BR
#define IS_UNSET_VALUE(V) \
((V) && (!(V)->pm || ((V)->pm->node.flags & PM_UNSET) || \
!(V)->pm->node.nam || !*(V)->pm->node.nam))
/*
* For named references. Simple named references are just like scalars
* for efficiency, but special named references need get/set functions.
*/
#define GETREFNAME(PM) (((PM)->node.flags & PM_SPECIAL) ? \
(PM)->gsu.s->getfn(PM) : (PM)->u.str)
#define SETREFNAME(PM,S) (((PM)->node.flags & PM_SPECIAL) ? \
(PM)->gsu.s->setfn(PM,(S)) : ((PM)->u.str = (S)))
static Param argvparam;
/* "parameter table" - hash table containing the parameters
*
* realparamtab always points to the shell's global table. paramtab is sometimes
* temporarily changed to point at another table, while dealing with the keys
* of an associative array (for example, see makecompparams() which initializes
* the associative array ${compstate}).
*/
/**/
mod_export HashTable paramtab, realparamtab;
/**/
mod_export HashTable
newparamtable(int size, char const *name)
{
HashTable ht;
if (!size)
size = 17;
ht = newhashtable(size, name, NULL);
ht->hash = hasher;
ht->emptytable = emptyhashtable;
ht->filltable = NULL;
ht->cmpnodes = strcmp;
ht->addnode = addhashnode;
ht->getnode = getparamnode;
ht->getnode2 = gethashnode2;
ht->removenode = removehashnode;
ht->disablenode = NULL;
ht->enablenode = NULL;
ht->freenode = freeparamnode;
ht->printnode = printparamnode;
return ht;
}
/**/
static HashNode
getparamnode(HashTable ht, const char *nam)
{
HashNode hn = gethashnode2(ht, nam);
Param pm = (Param) hn;
if (pm && (pm->node.flags & PM_AUTOLOAD) && pm->u.str) {
char *mn = dupstring(pm->u.str);
(void)ensurefeature(mn, "p:", (pm->node.flags & PM_AUTOALL) ? NULL :
nam);
hn = gethashnode2(ht, nam);
if (!hn) {
/*
* This used to be a warning, but surely if we allow
* stuff to go ahead with the autoload stub with
* no error status we're in for all sorts of mayhem?
*/
zerr("autoloading module %s failed to define parameter: %s", mn,
nam);
}
}
if (hn && ht == realparamtab && !(hn->flags & PM_UNSET))
hn = resolve_nameref((Param)hn, NULL);
return hn;
}
/* Copy a parameter hash table */
static HashTable outtable;
/**/
static void
scancopyparams(HashNode hn, UNUSED(int flags))
{
/* Going into a real parameter, so always use permanent storage */
Param pm = (Param)hn;
Param tpm = (Param) zshcalloc(sizeof *tpm);
tpm->node.nam = ztrdup(pm->node.nam);
copyparam(tpm, pm, 0);
addhashnode(outtable, tpm->node.nam, tpm);
}
/**/
HashTable
copyparamtable(HashTable ht, char *name)
{
HashTable nht = 0;
if (ht) {
nht = newparamtable(ht->hsize, name);
outtable = nht;
scanhashtable(ht, 0, 0, 0, scancopyparams, 0);
outtable = NULL;
}
return nht;
}
/* Flag to freeparamnode to unset the struct */
static int delunset;
/* Function to delete a parameter table. */
/**/
mod_export void
deleteparamtable(HashTable t)
{
/* The parameters in the hash table need to be unset *
* before being deleted. */
int odelunset = delunset;
delunset = 1;
deletehashtable(t);
delunset = odelunset;
}
static unsigned numparamvals;
/**/
mod_export void
scancountparams(UNUSED(HashNode hn), int flags)
{
++numparamvals;
if ((flags & SCANPM_WANTKEYS) && (flags & SCANPM_WANTVALS))
++numparamvals;
}
static Patprog scanprog;
static char *scanstr;
static char **paramvals;
static Param foundparam;
/**/
static void
scanparamvals(HashNode hn, int flags)
{
struct value v;
Patprog prog;
if (numparamvals && !(flags & SCANPM_MATCHMANY) &&
(flags & (SCANPM_MATCHVAL|SCANPM_MATCHKEY|SCANPM_KEYMATCH)))
return;
v.pm = (Param)hn;
if ((flags & SCANPM_KEYMATCH)) {
char *tmp = dupstring(v.pm->node.nam);
tokenize(tmp);
remnulargs(tmp);
if (!(prog = patcompile(tmp, 0, NULL)) || !pattry(prog, scanstr))
return;
} else if ((flags & SCANPM_MATCHKEY) && !pattry(scanprog, v.pm->node.nam)) {
return;
}
foundparam = v.pm;
if (flags & SCANPM_WANTKEYS) {
paramvals[numparamvals++] = v.pm->node.nam;
if (!(flags & (SCANPM_WANTVALS|SCANPM_MATCHVAL)))
return;
}
v.isarr = (PM_TYPE(v.pm->node.flags) & (PM_ARRAY|PM_HASHED));
v.flags = 0;
v.start = 0;
v.end = -1;
paramvals[numparamvals] = getstrvalue(&v);
if (flags & SCANPM_MATCHVAL) {
if (pattry(scanprog, paramvals[numparamvals])) {
numparamvals += ((flags & SCANPM_WANTVALS) ? 1 :
!(flags & SCANPM_WANTKEYS));
} else if (flags & SCANPM_WANTKEYS)
--numparamvals; /* Value didn't match, discard key */
} else
++numparamvals;
foundparam = NULL;
}
/**/
char **
paramvalarr(HashTable ht, int flags)
{
DPUTS((flags & (SCANPM_MATCHKEY|SCANPM_MATCHVAL)) && !scanprog,
"BUG: scanning hash without scanprog set");
numparamvals = 0;
if (ht)
scanhashtable(ht, 0, 0, PM_UNSET, scancountparams, flags);
paramvals = (char **) zhalloc((numparamvals + 1) * sizeof(char *));
if (ht) {
numparamvals = 0;
scanhashtable(ht, 0, 0, PM_UNSET, scanparamvals, flags);
}
paramvals[numparamvals] = 0;
return paramvals;
}
/* Return the full array (no indexing) referred to by a Value. *
* The array value is cached for the lifetime of the Value. */
/**/
static char **
getvaluearr(Value v)
{
if (v->arr)
return v->arr;
else if (PM_TYPE(v->pm->node.flags) == PM_ARRAY)
return v->arr = v->pm->gsu.a->getfn(v->pm);
else if (PM_TYPE(v->pm->node.flags) == PM_HASHED) {
v->arr = paramvalarr(v->pm->gsu.h->getfn(v->pm), v->isarr);
/* Can't take numeric slices of associative arrays */
v->start = 0;
v->end = numparamvals + 1;
return v->arr;
} else
return NULL;
}
/* Return whether the variable is set *
* checks that array slices are within range *
* used for [[ -v ... ]] condition test */
/**/
int
issetvar(char *name)
{
struct value vbuf;
Value v;
int slice;
char **arr;
if (!(v = getvalue(&vbuf, &name, 1)) || *name)
return 0; /* no value or more chars after the variable name */
if (v->isarr & ~SCANPM_ARRONLY)
return v->end > 1; /* for extracted elements, end gives us a count */
slice = v->start != 0 || v->end != -1;
if (PM_TYPE(v->pm->node.flags) != PM_ARRAY || !slice)
return !slice && !(v->pm->node.flags & PM_UNSET);
if (!v->end) /* empty array slice */
return 0;
/* get the array and check end is within range */
if (!(arr = getvaluearr(v)))
return 0;
return arrlen_ge(arr, v->end < 0 ? - v->end : v->end);
}
/*
* Split environment string into (name, value) pair.
* this is used to avoid in-place editing of environment table
* that results in core dump on some systems
*/
static int
split_env_string(char *env, char **name, char **value)
{
char *str, *tenv;
if (!env || !name || !value)
return 0;
tenv = strcpy(zhalloc(strlen(env) + 1), env);
for (str = tenv; *str && *str != '='; str++) {
if ((unsigned char) *str >= 128) {
/*
* We'll ignore environment variables with names not
* from the portable character set since we don't
* know of a good reason to accept them.
*/
return 0;
}
}
if (str != tenv && *str == '=') {
*str = '\0';
*name = tenv;
*value = str + 1;
return 1;
} else
return 0;
}
/**
* Check parameter flags to see if parameter shouldn't be imported
* from environment at start.
*
* return 1: don't import: 0: ok to import.
*/
static int dontimport(int flags)
{
/* If explicitly marked as don't import */
if (flags & PM_DONTIMPORT)
return 1;
/* If value already exported */
if (flags & PM_EXPORTED)
return 1;
/* If security issue when importing and running with some privilege */
if ((flags & PM_DONTIMPORT_SUID) && isset(PRIVILEGED))
return 1;
/* OK to import */
return 0;
}
/* Set up parameter hash table. This will add predefined *
* parameter entries as well as setting up parameter table *
* entries for environment variables we inherit. */
/**/
void
createparamtable(void)
{
Param ip, pm;
#if !defined(HAVE_PUTENV) && !defined(USE_SET_UNSET_ENV)
char **new_environ;
int envsize;
#endif
#ifndef USE_SET_UNSET_ENV
char **envp;
#endif
char **envp2, **sigptr, **t;
char buf[50], *str, *iname, *ivalue, *hostnam;
int oae = opts[ALLEXPORT];
#ifdef HAVE_UNAME
struct utsname unamebuf;
char *machinebuf;
#endif
paramtab = realparamtab = newparamtable(151, "paramtab");
/* Add the special parameters to the hash table */
for (ip = special_params; ip->node.nam; ip++)
paramtab->addnode(paramtab, ztrdup(ip->node.nam), ip);
if (EMULATION(EMULATE_SH|EMULATE_KSH)) {
for (ip = special_params_sh; ip->node.nam; ip++)
paramtab->addnode(paramtab, ztrdup(ip->node.nam), ip);
} else {
while ((++ip)->node.nam)
paramtab->addnode(paramtab, ztrdup(ip->node.nam), ip);
}
argvparam = (Param) &argvparam_pm;
noerrs = 2;
/* Add the standard non-special parameters which have to *
* be initialized before we copy the environment variables. *
* We don't want to override whatever values the user has *
* given them in the environment. */
opts[ALLEXPORT] = 0;
setiparam("MAILCHECK", 60);
setiparam("KEYTIMEOUT", 40);
setiparam("LISTMAX", 100);
/*
* We used to get the output baud rate here. However, that's
* pretty irrelevant to a terminal on an X display and can lead
* to unnecessary delays if it's wrong (which it probably is).
* Furthermore, even if the output is slow it's very likely
* to be because of WAN delays, not covered by the output
* baud rate.
* So allow the user to set it in the special cases where it's
* useful.
*/
setsparam("TMPPREFIX", ztrdup_metafy(DEFAULT_TMPPREFIX));
setsparam("TIMEFMT", ztrdup_metafy(DEFAULT_TIMEFMT));
hostnam = (char *)zalloc(256);
gethostname(hostnam, 256);
setsparam("HOST", ztrdup_metafy(hostnam));
zfree(hostnam, 256);
setsparam("LOGNAME",
#ifndef DISABLE_DYNAMIC_NSS
(str = getlogin()) && *str ? ztrdup_metafy(str) :
#endif
ztrdup(cached_username));
#if !defined(HAVE_PUTENV) && !defined(USE_SET_UNSET_ENV)
/* Copy the environment variables we are inheriting to dynamic *
* memory, so we can do mallocs and frees on it. */
envsize = sizeof(char *)*(1 + arrlen(environ));
new_environ = (char **) zalloc(envsize);
memcpy(new_environ, environ, envsize);
environ = new_environ;
#endif
/* Use heap allocation to avoid many small alloc/free calls */
pushheap();
/* Now incorporate environment variables we are inheriting *
* into the parameter hash table. Copy them into dynamic *
* memory so that we can free them if needed */
for (
#ifndef USE_SET_UNSET_ENV
envp =
#endif
envp2 = environ; *envp2; envp2++) {
if (split_env_string(*envp2, &iname, &ivalue)) {
if (!idigit(*iname) && isident(iname) && !strchr(iname, '[')) {
/*
* Parameters that aren't already in the parameter table
* aren't special to the shell, so it's always OK to
* import. Otherwise, check parameter flags.
*/
if ((!(pm = (Param) paramtab->getnode(paramtab, iname)) ||
!dontimport(pm->node.flags)) &&
(pm = assignsparam(iname, metafy(ivalue, -1, META_DUP),
ASSPM_ENV_IMPORT))) {
pm->node.flags |= PM_EXPORTED;
if (pm->node.flags & PM_SPECIAL)
pm->env = mkenvstr (pm->node.nam,
getsparam(pm->node.nam), pm->node.flags);
else
pm->env = ztrdup(*envp2);
#ifndef USE_SET_UNSET_ENV
*envp++ = pm->env;
#endif
}
}
}
}
popheap();
#ifndef USE_SET_UNSET_ENV
*envp = NULL;
#endif
opts[ALLEXPORT] = oae;
/*
* For native emulation we always set the variable home
* (see setupvals()).
*/
pm = (Param) paramtab->getnode(paramtab, "HOME");
if (EMULATION(EMULATE_ZSH))
{
pm->node.flags &= ~PM_UNSET;
if (!(pm->node.flags & PM_EXPORTED))
addenv(pm, home);
} else if (!home)
pm->node.flags |= PM_UNSET;
pm = (Param) paramtab->getnode(paramtab, "LOGNAME");
if (!(pm->node.flags & PM_EXPORTED))
addenv(pm, pm->u.str);
pm = (Param) paramtab->getnode(paramtab, "SHLVL");
sprintf(buf, "%d", (int)++shlvl);
/* shlvl value in environment needs updating unconditionally */
addenv(pm, buf);
/* Add the standard non-special parameters */
set_pwd_env();
#ifdef HAVE_UNAME
if(uname(&unamebuf)) setsparam("CPUTYPE", ztrdup("unknown"));
else
{
machinebuf = ztrdup_metafy(unamebuf.machine);
setsparam("CPUTYPE", machinebuf);
}
#else
setsparam("CPUTYPE", ztrdup_metafy("unknown"));
#endif
setsparam("MACHTYPE", ztrdup_metafy(MACHTYPE));
setsparam("OSTYPE", ztrdup_metafy(OSTYPE));
setsparam("TTY", ztrdup_metafy(ttystrname));
setsparam("VENDOR", ztrdup_metafy(VENDOR));
setsparam("ZSH_ARGZERO", ztrdup(posixzero));
setsparam("ZSH_VERSION", ztrdup_metafy(ZSH_VERSION));
setsparam("ZSH_PATCHLEVEL", ztrdup_metafy(ZSH_PATCHLEVEL));
setaparam("signals", sigptr = zalloc((TRAPCOUNT + 1) * sizeof(char *)));
t = sigs;
#if defined(SIGRTMIN) && defined(SIGRTMAX)
while (t - sigs <= SIGCOUNT)
*sigptr++ = ztrdup_metafy(*t++);
{
int sig;
for (sig = SIGRTMIN; sig <= SIGRTMAX; sig++)
*sigptr++ = ztrdup_metafy(rtsigname(sig, 0));
}
#endif
while ((*sigptr++ = ztrdup_metafy(*t++))) /* empty */ ;
noerrs = 0;
}
/* assign various functions used for non-special parameters */
/**/
mod_export void
assigngetset(Param pm)
{
switch (PM_TYPE(pm->node.flags)) {
case PM_SCALAR:
pm->gsu.s = &stdscalar_gsu;
break;
case PM_INTEGER:
pm->gsu.i = &stdinteger_gsu;
break;
case PM_EFLOAT:
case PM_FFLOAT:
pm->gsu.f = &stdfloat_gsu;
break;
case PM_ARRAY:
pm->gsu.a = &stdarray_gsu;
break;
case PM_HASHED:
pm->gsu.h = &stdhash_gsu;
break;
default:
DPUTS(1, "BUG: tried to create param node without valid flag");
break;
}
}
/* Create a parameter, so that it can be assigned to. Returns NULL if the *
* parameter already exists or can't be created, otherwise returns the *
* parameter node. If a parameter of the same name exists in an outer *
* scope, it is hidden by a newly created parameter. An already existing *
* parameter node at the current level may be `created' and returned *
* provided it is unset and not special. If the parameter can't be *
* created because it already exists, the PM_UNSET flag is cleared. */
/**/
mod_export Param
createparam(char *name, int flags)
{
Param pm, oldpm;
if (paramtab != realparamtab)
flags = (flags & ~PM_EXPORTED) | PM_HASHELEM;
if (name != nulstring) {
oldpm = (Param) (paramtab == realparamtab ?
/* gethashnode2() for direct table read */
gethashnode2(paramtab, name) :
paramtab->getnode(paramtab, name));
if (oldpm && (oldpm->node.flags & PM_RO_BY_DESIGN)) {
if (!(flags & PM_LOCAL)) {
/* Must call the API for namerefs and specials to work */
pm = (Param) paramtab->getnode2(paramtab, oldpm->node.nam);
if (!pm || ((pm->node.flags & PM_NAMEREF) &&
pm->level != locallevel)) {
zerr("%s: can't modify read-only parameter", name);
return NULL;
}
}
/**
* Implementation note: In the case of a readonly nameref,
* the right thing might be to insert a new global into
* the paramtab and point the local pm->old at it, rather
* than error. That is why gethashnode2() is called
* first, to avoid skipping up the stack prematurely.
**/
}
if (oldpm && !(flags & PM_NAMEREF) &&
(oldpm->level == locallevel ?
!(oldpm->node.flags & PM_RO_BY_DESIGN) : !(flags & PM_LOCAL)) &&
(oldpm->node.flags & PM_NAMEREF) &&
(oldpm = upscope(oldpm, oldpm->base))) {
Param lastpm;
struct asgment stop;
stop.flags = PM_NAMEREF | (flags & PM_LOCAL);
stop.name = oldpm->node.nam;
stop.value.scalar = GETREFNAME(oldpm);
lastpm = (Param)resolve_nameref(oldpm, &stop);
if (lastpm) {
if (lastpm->node.flags & PM_NAMEREF) {
char *refname = GETREFNAME(lastpm);
if (refname && *refname) {
name = refname;
oldpm = NULL;
} else {
if (!(lastpm->node.flags & PM_READONLY)) {
if (flags) {
/* Only plain scalar assignment allowed */
zerr("%s: can't change type of named reference",
name); /* Differs from ksh93u+ */
return NULL;
}
}
return lastpm;
}
} else {
/* nameref pointing to an unset local */
DPUTS(!(lastpm->node.flags & PM_UNSET),
"BUG: local parameter is not unset");
oldpm = lastpm;
}
}
}
DPUTS(oldpm && oldpm->level > locallevel,
"BUG: old local parameter not deleted");
if (oldpm && (oldpm->level == locallevel || !(flags & PM_LOCAL))) {
if (isset(POSIXBUILTINS) && (oldpm->node.flags & PM_READONLY)) {
zerr("read-only variable: %s", name);
return NULL;
}
if ((oldpm->node.flags & PM_RESTRICTED) && isset(RESTRICTED)) {
zerr("%s: restricted", name);
return NULL;
}
if (!(oldpm->node.flags & PM_UNSET) ||
(oldpm->node.flags & PM_SPECIAL) ||
/* POSIXBUILTINS horror: we need to retain 'export' flags */
(isset(POSIXBUILTINS) && (oldpm->node.flags & PM_EXPORTED))) {
if (oldpm->node.flags & PM_RO_BY_DESIGN) {
zerr("%s: can't modify read-only parameter",
name);
return NULL;
}
oldpm->node.flags &= ~PM_UNSET;
if ((oldpm->node.flags & PM_SPECIAL) && oldpm->ename) {
Param altpm =
(Param) paramtab->getnode(paramtab, oldpm->ename);
if (altpm)
altpm->node.flags &= ~PM_UNSET;
}
return NULL;
}
pm = oldpm;
pm->base = pm->width = 0;
oldpm = pm->old;
} else {
pm = (Param) zshcalloc(sizeof *pm);
if ((pm->old = oldpm)) {
/*
* needed to avoid freeing oldpm, but we do take it
* out of the environment when it's hidden.
*/
if (oldpm->env)
delenv(oldpm);
paramtab->removenode(paramtab, name);
}
paramtab->addnode(paramtab, ztrdup(name), pm);
}
if (isset(ALLEXPORT) && !(flags & PM_HASHELEM))
flags |= PM_EXPORTED;
} else {
pm = (Param) hcalloc(sizeof *pm);
pm->node.nam = nulstring;
}
pm->node.flags = flags & ~PM_LOCAL;
if(!(pm->node.flags & PM_SPECIAL))
assigngetset(pm);
return pm;
}
/* Empty dummy function for special hash parameters. */
/**/
static void
shempty(void)
{
}
/*
* Create a simple special hash parameter.
*
* This is for hashes added internally --- it's not possible to add
* special hashes from shell commands. It's currently used
* - by addparamdef() for special parameters in the zsh/parameter
* module
* - by ztie for special parameters tied to databases.
*/
/**/
mod_export Param
createspecialhash(char *name, GetNodeFunc get, ScanTabFunc scan, int flags)
{
Param pm;
HashTable ht;
if (!(pm = createparam(name, PM_SPECIAL|PM_HASHED|flags)))
return NULL;
/*
* If there's an old parameter, we'll put the new one at
* the current locallevel, so that the old parameter is
* exposed again after leaving the function. Otherwise,
* we'll leave it alone. Usually this means the parameter
* will stay in place until explicitly unloaded, however
* if the parameter was previously unset within a function
* we'll inherit the level of that function and follow the
* standard convention that the parameter remains local
* even if unset.
*
* These semantics are similar to those of a normal parameter set
* within a function without a local definition.
*/
if (pm->old)
pm->level = locallevel;
pm->gsu.h = (flags & PM_READONLY) ? &stdhash_gsu :
&nullsethash_gsu;
pm->u.hash = ht = newhashtable(0, name, NULL);
ht->hash = hasher;
ht->emptytable = (TableFunc) shempty;
ht->filltable = NULL;
ht->addnode = (AddNodeFunc) shempty;
ht->getnode = ht->getnode2 = get;
ht->removenode = (RemoveNodeFunc) shempty;
ht->disablenode = NULL;
ht->enablenode = NULL;
ht->freenode = (FreeNodeFunc) shempty;
ht->printnode = printparamnode;
ht->scantab = scan;
return pm;
}
/*
* Copy a parameter
*
* If fakecopy is set, we are just saving the details of a special
* parameter. Otherwise, the result will be used as a real parameter
* and we need to do more work.
*/
/**/
void
copyparam(Param tpm, Param pm, int fakecopy)
{
/*
* Note that tpm, into which we're copying, may not be in permanent
* storage. However, the values themselves are later used directly
* to set the parameter, so must be permanently allocated (in accordance
* with sets.?fn() usage).
*/
tpm->node.flags = pm->node.flags;
tpm->base = pm->base;
tpm->width = pm->width;
tpm->level = pm->level;
if (!fakecopy) {
tpm->old = pm->old;
tpm->node.flags &= ~PM_SPECIAL;
}
switch (PM_TYPE(pm->node.flags)) {
case PM_SCALAR:
tpm->u.str = ztrdup(pm->gsu.s->getfn(pm));
break;
case PM_INTEGER:
tpm->u.val = pm->gsu.i->getfn(pm);
break;
case PM_EFLOAT:
case PM_FFLOAT:
tpm->u.dval = pm->gsu.f->getfn(pm);
break;
case PM_ARRAY:
tpm->u.arr = zarrdup(pm->gsu.a->getfn(pm));
break;
case PM_HASHED:
tpm->u.hash = copyparamtable(pm->gsu.h->getfn(pm), pm->node.nam);
break;
}
/*
* If the value is going to be passed as a real parameter (e.g. this is
* called from inside an associative array), we need the gets and sets
* functions to be useful.
*
* In this case we assume the saved parameter is not itself special,
* so we just use the standard functions. This is also why we switch off
* PM_SPECIAL.
*/
if (!fakecopy)
assigngetset(tpm);
}
/* Return 1 if the string s is a valid identifier, else return 0. */
/**/
mod_export int
isident(char *s)
{
char *ss;
if (!*s) /* empty string is definitely not valid */
return 0;
/* This partly duplicates code in itype_end(), but we need to
* distinguish the leading namespace at this point to check the
* correctness of the identifier that follows
*/
if (*s == '.') {
if (idigit(s[1]))
return 0; /* Namespace must not start with a digit */
/* Reject identifiers beginning with a digit in namespaces.
* Move this out below this block to also reject v.1x form.
*/
if ((ss = itype_end(s + (*s == '.'), IIDENT, 0))) {
if (*ss == '.') {
if (!ss[1])
return 0;
if (idigit(ss[1]))
s = ss + 1;
}
}
}
if (idigit(*s)) {
/* If the first character is `s' is a digit, then all must be */
for (ss = ++s; *ss; ss++)
if (!idigit(*ss))
break;
} else {
/* Find the first character in `s' not in the iident type table */
ss = itype_end(s, INAMESPC, 0);
}
/* If the next character is not [, then it is *
* definitely not a valid identifier. */
if (!*ss)
return 1;
if (s == ss)
return 0;
if (*ss != '[')
return 0;
/* Require balanced [ ] pairs with something between */
if (!(ss = parse_subscript(++ss, 1, ']')))
return 0;
untokenize(s);
return !ss[1];
}
/*
* Parse a single argument to a parameter subscript.
* The subscripts starts at *str; *str is updated (input/output)
*
* *inv is set to indicate if the subscript is reversed (output)
* v is the Value for the parameter being accessed (input; note
* v->isarr may be modified, and if v is a hash the parameter will
* be updated to the element of the hash)
* a2 is 1 if this is the second subscript of a range (input)
* *w is only set if we need to find the end of a word (input; should
* be set to 0 by the caller).
*
* The final two arguments are to support multibyte characters.
* If supplied they are set to the length of the character before
* the index position and the one at the index position. If
* multibyte characters are not in use they are set to 1 for
* consistency. Note they aren't fully handled if a2 is non-zero,
* since they aren't needed.
*
* Returns a raw offset into the value from the start or end (i.e.
* after the arithmetic for Meta and possible multibyte characters has
* been taken into account). This actually gives the offset *after*
* the character in question; subtract *prevcharlen if necessary.
*/
/**/
static zlong
getarg(char **str, int *inv, Value v, int a2, zlong *w,
int *prevcharlen, int *nextcharlen, int flags)
{
int hasbeg = 0, word = 0, rev = 0, ind = 0, down = 0, l, i, ishash;
int keymatch = 0, needtok = 0, arglen, len, inpar = 0;
char *s = *str, *sep = NULL, *t, sav, *d, **ta, **p, *tt, c;
zlong num = 1, beg = 0, r = 0, quote_arg = 0;
Patprog pprog = NULL;
/*
* If in NO_EXEC mode, the parameters won't be set up properly,
* so just pretend everything is a hash for subscript parsing
*/
ishash = (unset(EXECOPT) ||
(v->pm && PM_TYPE(v->pm->node.flags) == PM_HASHED));
if (prevcharlen)
*prevcharlen = 1;
if (nextcharlen)
*nextcharlen = 1;
/* first parse any subscription flags */
if (v->pm && (*s == '(' || *s == Inpar)) {
int escapes = 0;
for (s++; *s != ')' && *s != Outpar && s != *str; s++) {
switch (*s) {
case 'r':
rev = 1;
keymatch = down = ind = 0;
break;
case 'R':
rev = down = 1;
keymatch = ind = 0;
break;
case 'k':
keymatch = ishash;
rev = 1;
down = ind = 0;
break;
case 'K':
keymatch = ishash;
rev = down = 1;
ind = 0;
break;
case 'i':
rev = ind = 1;
down = keymatch = 0;
break;
case 'I':
rev = ind = down = 1;
keymatch = 0;
break;
case 'w':
/* If the parameter is a scalar, then make subscription *
* work on a per-word basis instead of characters. */
word = 1;
break;
case 'f':
word = 1;
sep = "\n";
break;
case 'e':
quote_arg = 1;
break;
case 'n':
t = get_strarg(++s, &arglen);
if (!*t)
goto flagerr;
sav = *t;
*t = '\0';
num = mathevalarg(s + arglen, &d);
if (!num)
num = 1;
*t = sav;
s = t + arglen - 1;
break;
case 'b':
hasbeg = 1;
t = get_strarg(++s, &arglen);
if (!*t)
goto flagerr;
sav = *t;
*t = '\0';
if ((beg = mathevalarg(s + arglen, &d)) > 0)
beg--;
*t = sav;
s = t + arglen - 1;
break;
case 'p':
escapes = 1;
break;
case 's':
/* This gives the string that separates words *
* (for use with the `w' flag). */
t = get_strarg(++s, &arglen);
if (!*t)
goto flagerr;
sav = *t;
*t = '\0';
s += arglen;
if (escapes) {
int len;
sep = getkeystring(s, &len, GETKEYS_SEP, NULL);
sep = metafy(sep, len, META_HREALLOC);
}
else
sep = dupstring(s);
*t = sav;
s = t + arglen - 1;
break;
default:
flagerr:
num = 1;
word = rev = ind = down = keymatch = 0;
sep = NULL;
s = *str - 1;
}
}
if (s != *str)
s++;
}
if (num < 0) {
down = !down;
num = -num;
}
if (v->isarr & SCANPM_WANTKEYS)
*inv = (ind || !(v->isarr & SCANPM_WANTVALS));
else if (v->isarr & SCANPM_WANTVALS)
*inv = 0;
else {
if (v->isarr) {
if (ind) {
v->isarr |= SCANPM_WANTKEYS;
v->isarr &= ~SCANPM_WANTVALS;
} else if (rev)
v->isarr |= SCANPM_WANTVALS;
/*
* This catches the case where we are using "k" (rather
* than "K") on a hash.
*/
if (!down && keymatch && ishash)
v->isarr &= ~SCANPM_MATCHMANY;
}
*inv = ind;
}
for (t = s, i = 0;
(c = *t) &&
((c != Outbrack && (ishash || c != ',')) || i || inpar);
t++) {
/* Untokenize inull() except before brackets and double-quotes */
if (inull(c)) {
c = t[1];
if (c == '[' || c == ']' ||
c == '(' || c == ')' ||
c == '{' || c == '}') {
/* This test handles nested subscripts in hash keys */
if (ishash && i)
*t = ztokens[*t - Pound];
needtok = 1;
++t;
} else if (c != '"')
*t = ztokens[*t - Pound];
continue;
}
/* Inbrack and Outbrack are probably never found here ... */
if (c == '[' || c == Inbrack)
i++;
else if (c == ']' || c == Outbrack)
i--;
if (c == '(' || c == Inpar)
inpar++;
else if (c == ')' || c == Outpar)
inpar--;
if (ispecial(c))
needtok = 1;
}
if (!c)
return 0;
*str = tt = t;
/*
* If in NO_EXEC mode, the parameters won't be set up properly,
* so there's no additional sanity checking we can do.
* Just return 0 now.
*/
if (unset(EXECOPT))
return 0;
s = dupstrpfx(s, t - s);
/* If we're NOT reverse subscripting, strip the inull()s so brackets *
* are not backslashed after parsestr(). Otherwise leave them alone *
* so that the brackets will be escaped when we patcompile() or when *
* subscript arithmetic is performed (for nested subscripts). */
if (ishash && (keymatch || !rev))
remnulargs(s);
if (needtok) {
char exe = opts[EXECOPT];
s = dupstring(s);
if (parsestr(&s))
return 0;
if (flags & SCANPM_NOEXEC)
opts[EXECOPT] = 0;
singsub(&s);
opts[EXECOPT] = exe;
} else if (rev)
remnulargs(s); /* This is probably always a no-op, but ... */
if (!rev) {
if (ishash) {
HashTable ht = v->pm->gsu.h->getfn(v->pm);
if (!ht) {
if (flags & SCANPM_CHECKING)
return 0;
ht = newparamtable(17, v->pm->node.nam);
v->pm->gsu.h->setfn(v->pm, ht);
}
untokenize(s);
if (!(v->pm = (Param) ht->getnode(ht, s))) {
HashTable tht = paramtab;
paramtab = ht;
v->pm = createparam(s, PM_SCALAR|PM_UNSET);
paramtab = tht;
}
v->isarr = (*inv ? SCANPM_WANTINDEX : 0);
v->start = 0;
*inv = 0; /* We've already obtained the "index" (key) */
*w = v->end = -1;
r = isset(KSHARRAYS) ? 1 : 0;
} else {
r = mathevalarg(s, &s);
if (isset(KSHARRAYS) && r >= 0)
r++;
}
if (word && !v->isarr) {
s = t = getstrvalue(v);
i = wordcount(s, sep, 0);
if (r < 0)
r += i + 1;
if (r < 1)
r = 1;
if (r > i)
r = i;
if (!s || !*s)
return 0;
while ((d = findword(&s, sep)) && --r);
if (!d)
return 0;
if (!a2 && *tt != ',')
*w = (zlong)(s - t);
return (a2 ? s : d + 1) - t;
} else if (!v->isarr && !word) {
int lastcharlen = 1;
s = getstrvalue(v);
/*
* Note for the confused (= pws): the index r we
* have so far is that specified by the user. The value
* passed back is an offset from the start or end of
* the string. Hence it needs correcting at least
* for Meta characters and maybe for multibyte characters.
*/
if (r > 0) {
zlong nchars = r;
MB_METACHARINIT();
for (t = s; nchars && *t; nchars--)
t += (lastcharlen = MB_METACHARLEN(t));
/* for consistency, keep any remainder off the end */
r = (zlong)(t - s) + nchars;
if (prevcharlen && !nchars /* ignore if off the end */)
*prevcharlen = lastcharlen;
if (nextcharlen && *t)
*nextcharlen = MB_METACHARLEN(t);
} else if (r == 0) {
if (prevcharlen)
*prevcharlen = 0;
if (nextcharlen && *s) {
MB_METACHARINIT();
*nextcharlen = MB_METACHARLEN(s);
}
} else {
zlong nchars = (zlong)MB_METASTRLEN(s) + r;
if (nchars < 0) {
/* make sure this isn't valid as a raw pointer */
r -= (zlong)strlen(s);
} else {
MB_METACHARINIT();
for (t = s; nchars && *t; nchars--)
t += (lastcharlen = MB_METACHARLEN(t));
r = - (zlong)strlen(t); /* keep negative */
if (prevcharlen)
*prevcharlen = lastcharlen;
if (nextcharlen && *t)
*nextcharlen = MB_METACHARLEN(t);
}
}
}
} else {
if (!v->isarr && !word && !quote_arg) {
l = strlen(s);
if (a2) {
if (!l || *s != '*') {
d = (char *) hcalloc(l + 2);
*d = '*';
strcpy(d + 1, s);
s = d;
}
} else {
if (!l || s[l - 1] != '*' || (l > 1 && s[l - 2] == '\\')) {
d = (char *) hcalloc(l + 2);
strcpy(d, s);
strcat(d, "*");
s = d;
}
}
}
if (!keymatch) {
if (quote_arg) {
untokenize(s);
/* Scalar (e) needs implicit asterisk tokens */
if (!v->isarr && !word) {
l = strlen(s);
d = (char *) hcalloc(l + 2);
if (a2) {
*d = Star;
strcpy(d + 1, s);
} else {
strcpy(d, s);
d[l] = Star;
d[l + 1] = '\0';
}
s = d;
}
} else
tokenize(s);
remnulargs(s);
pprog = patcompile(s, 0, NULL);
} else
pprog = NULL;
if (v->isarr) {
if (ishash) {
scanprog = pprog;
scanstr = s;
if (keymatch)
v->isarr |= SCANPM_KEYMATCH;
else {
if (!pprog)
return 1;
if (ind)
v->isarr |= SCANPM_MATCHKEY;
else
v->isarr |= SCANPM_MATCHVAL;
}
if (down)
v->isarr |= SCANPM_MATCHMANY;
if ((ta = getvaluearr(v)) &&
(*ta || ((v->isarr & SCANPM_MATCHMANY) &&
(v->isarr & (SCANPM_MATCHKEY | SCANPM_MATCHVAL |
SCANPM_KEYMATCH))))) {
*inv = (v->flags & VALFLAG_INV) ? 1 : 0;
*w = v->end;
scanprog = NULL;
return 1;
}
scanprog = NULL;
} else
ta = getarrvalue(v);
if (!ta || !*ta)
return !down;
len = arrlen(ta);
if (beg < 0)
beg += len;
if (down) {
if (beg < 0)
return 0;
} else if (beg >= len)
return len + 1;
if (beg >= 0 && beg < len) {
if (down) {
if (!hasbeg)
beg = len - 1;
for (r = 1 + beg, p = ta + beg; p >= ta; r--, p--) {
if (pprog && pattry(pprog, *p) && !--num)
return r;
}
} else
for (r = 1 + beg, p = ta + beg; *p; r++, p++)
if (pprog && pattry(pprog, *p) && !--num)
return r;
}
} else if (word) {
ta = sepsplit(d = s = getstrvalue(v), sep, 1, 1);
len = arrlen(ta);
if (beg < 0)
beg += len;
if (down) {
if (beg < 0)
return 0;
} else if (beg >= len)
return len + 1;
if (beg >= 0 && beg < len) {
if (down) {
if (!hasbeg)
beg = len - 1;
for (r = 1 + beg, p = ta + beg; p >= ta; p--, r--)
if (pprog && pattry(pprog, *p) && !--num)
break;
if (p < ta)
return 0;
} else {
for (r = 1 + beg, p = ta + beg; *p; r++, p++)
if (pprog && pattry(pprog, *p) && !--num)
break;
if (!*p)
return 0;
}
}
if (a2)
r++;
for (i = 0; (t = findword(&d, sep)) && *t; i++)
if (!--r) {
r = (zlong)(t - s + (a2 ? -1 : 1));
if (!a2 && *tt != ',')
*w = r + strlen(ta[i]) - 1;
return r;
}
return a2 ? -1 : 0;
} else {
/* Searching characters */
int slen;
d = getstrvalue(v);
if (!d)
return 0;
/*
* beg and len are character counts, not raw offsets.
* Remember we need to return a raw offset.
*/
len = MB_METASTRLEN(d);
slen = strlen(d);
if (beg < 0)
beg += len;
MB_METACHARINIT();
if (beg >= 0 && beg < len) {
char *de = d + slen;
if (a2) {
/*
* Second argument: we don't need to
* handle prevcharlen or nextcharlen, but
* we do need to handle characters appropriately.
*/
if (down) {
int nmatches = 0;
char *lastpos = NULL;
if (!hasbeg)
beg = len;
/*
* See below: we have to move forward,
* but need to count from the end.
*/
for (t = d, r = 0; r <= beg; r++) {
sav = *t;
*t = '\0';
if (pprog && pattry(pprog, d)) {
nmatches++;
lastpos = t;
}
*t = sav;
if (t == de)
break;
t += MB_METACHARLEN(t);
}
if (nmatches >= num) {
if (num > 1) {
nmatches -= num;
MB_METACHARINIT();
for (t = d, r = 0; ; r++) {
sav = *t;
*t = '\0';
if (pprog && pattry(pprog, d) &&
nmatches-- == 0) {
lastpos = t;
*t = sav;
break;
}
*t = sav;
t += MB_METACHARLEN(t);
}
}
/* else lastpos is already OK */
return lastpos - d;
}
} else {
/*
* This handling of the b flag
* gives odd results, but this is the
* way it's always worked.
*/
for (t = d; beg && t <= de; beg--)
t += MB_METACHARLEN(t);
for (;;) {
sav = *t;
*t = '\0';
if (pprog && pattry(pprog, d) && !--num) {
*t = sav;
/*
* This time, don't increment
* pointer, since it's already
* after everything we matched.
*/
return t - d;
}
*t = sav;
if (t == de)
break;
t += MB_METACHARLEN(t);
}
}
} else {
/*
* First argument: this is the only case
* where we need prevcharlen and nextcharlen.
*/
int lastcharlen;
if (down) {
int nmatches = 0;
char *lastpos = NULL;
if (!hasbeg)
beg = len;
/*
* We can only move forward through
* multibyte strings, so record the
* matches.
* Unfortunately the count num works
* from the end, so it's easy to get the
* last one but we need to repeat if
* we want another one.
*/
for (t = d, r = 0; r <= beg; r++) {
if (pprog && pattry(pprog, t)) {
nmatches++;
lastpos = t;
}
if (t == de)
break;
t += MB_METACHARLEN(t);
}
if (nmatches >= num) {
if (num > 1) {
/*
* Need to start again and repeat
* to get the right match.
*/
nmatches -= num;
MB_METACHARINIT();
for (t = d, r = 0; ; r++) {
if (pprog && pattry(pprog, t) &&
nmatches-- == 0) {
lastpos = t;
break;
}
t += MB_METACHARLEN(t);
}
}
/* else lastpos is already OK */
/* return pointer after matched char */
lastpos +=
(lastcharlen = MB_METACHARLEN(lastpos));
if (prevcharlen)
*prevcharlen = lastcharlen;
if (nextcharlen)
*nextcharlen = MB_METACHARLEN(lastpos);
return lastpos - d;
}
for (r = beg + 1, t = d + beg; t >= d; r--, t--) {
if (pprog && pattry(pprog, t) &&
!--num)
return r;
}
} else {
for (t = d; beg && t <= de; beg--)
t += MB_METACHARLEN(t);
for (;;) {
if (pprog && pattry(pprog, t) && !--num) {
/* return pointer after matched char */
t += (lastcharlen = MB_METACHARLEN(t));
if (prevcharlen)
*prevcharlen = lastcharlen;
if (nextcharlen)
*nextcharlen = MB_METACHARLEN(t);
return t - d;
}
if (t == de)
break;
t += MB_METACHARLEN(t);
}
}
}
}
return down ? 0 : slen + 1;
}
}
return r;
}
/*
* Parse a subscript.
*
* pptr: In/Out parameter. On entry, *ptr points to a "[foo]" string. On exit
* it will point one past the closing bracket.
*
* v: In/Out parameter. Its .start and .end members (at least) will be updated
* with the parsed indices.
*
* flags: can be either SCANPM_DQUOTED or zero. Other bits are not used.
*/
/**/
int
getindex(char **pptr, Value v, int flags)
{
int start, end, inv = 0;
char *s = *pptr, *tbrack;
*s++ = '[';
/* Error handled after untokenizing */
s = parse_subscript(s, flags & SCANPM_DQUOTED, ']');
/* Now we untokenize everything except inull() markers so we can check *
* for the '*' and '@' special subscripts. The inull()s are removed *
* in getarg() after we know whether we're doing reverse indexing. */
for (tbrack = *pptr + 1; *tbrack && tbrack != s; tbrack++) {
if (inull(*tbrack) && !*++tbrack)
break;
if (itok(*tbrack)) /* Need to check for Nularg here? */
*tbrack = ztokens[*tbrack - Pound];
}
/* If we reached the end of the string (s == NULL) we have an error */
if (*tbrack)
*tbrack = Outbrack;
else {
zerr("invalid subscript");
*pptr = tbrack;
return 1;
}
s = *pptr + 1;
if ((s[0] == '*' || s[0] == '@') && s + 1 == tbrack) {
if ((v->isarr || IS_UNSET_VALUE(v)) && s[0] == '@')
v->isarr |= SCANPM_ISVAR_AT;
v->start = 0;
v->end = -1;
s += 2;
} else {
zlong we = 0, dummy;
int startprevlen, startnextlen;
start = getarg(&s, &inv, v, 0, &we, &startprevlen, &startnextlen,
flags);
if (inv) {
if (!v->isarr && start != 0) {
char *t, *p;
t = getstrvalue(v);
/*
* Note for the confused (= pws): this is an inverse
* offset so at this stage we need to convert from
* the immediate offset into the value that we have
* into a logical character position.
*/
if (start > 0) {
int nstart = 0;
char *target = t + start - startprevlen;
p = t;
MB_METACHARINIT();
while (*p) {
/*
* move up characters, counting how many we
* found
*/
p += MB_METACHARLEN(p);
if (p < target)
nstart++;
else {
if (p == target)
nstart++;
else
p = target; /* pretend we hit exactly */
break;
}
}
/* if start was too big, keep the difference */
start = nstart + (target - p) + 1;
} else {
zlong startoff = start + strlen(t);
#ifdef DEBUG
dputs("BUG: can't have negative inverse offsets???");
#endif
if (startoff < 0) {
/* invalid: keep index but don't dereference */
start = startoff;
} else {
/* find start in full characters */
MB_METACHARINIT();
for (p = t; p < t + startoff;)
p += MB_METACHARLEN(p);
start = - MB_METASTRLEN(p);
}
}
}
if (start > 0 && (isset(KSHARRAYS) || (v->pm->node.flags & PM_HASHED)))
start--;
if (v->isarr != SCANPM_WANTINDEX) {
v->flags |= VALFLAG_INV;
v->isarr = 0;
v->start = start;
v->end = start + 1;
}
if (*s == ',') {
zerr("invalid subscript");
*tbrack = ']';
*pptr = tbrack+1;
return 1;
}
if (s == tbrack)
s++;
} else {
int com;
if ((com = (*s == ','))) {
s++;
end = getarg(&s, &inv, v, 1, &dummy, NULL, NULL, flags);
} else {
end = we ? we : start;
}
if (start != end)
com = 1;
/*
* Somehow the logic sometimes forces us to use the previous
* or next character to what we would expect, which is
* why we had to calculate them in getarg().
*/
if (start > 0)
start -= startprevlen;
else if (start == 0 && end == 0)
{
/*
* Strictly, this range is entirely off the
* start of the available index range.
* This can't happen with KSH_ARRAYS; we already
* altered the start index in getarg().
* Are we being strict?
*/
if (isset(KSHZEROSUBSCRIPT)) {
/*
* We're not.
* Treat this as accessing the first element of the
* array.
*/
end = startnextlen;
} else {
/*
* We are. Flag that this range is invalid
* for setting elements. Set the indexes
* to a range that returns empty for other accesses.
*/
v->flags |= VALFLAG_EMPTY;
start = -1;
com = 1;
}
}
if (s == tbrack) {
s++;
if (v->isarr && !com &&
(!(v->isarr & SCANPM_MATCHMANY) ||
!(v->isarr & (SCANPM_MATCHKEY | SCANPM_MATCHVAL |
SCANPM_KEYMATCH))))
v->isarr = 0;
v->start = start;
v->end = end;
} else
s = *pptr;
}
}
*tbrack = ']';
*pptr = s;
return 0;
}
/**/
mod_export Value
getvalue(Value v, char **pptr, int bracks)
{
return fetchvalue(v, pptr, bracks, 0);
}
/**/
mod_export Value
fetchvalue(Value v, char **pptr, int bracks, int flags)
{
char *s, *t, *ie;
char sav, c;
int ppar = 0;
int itype = (flags & SCANPM_NONAMESPC) ? IIDENT : INAMESPC;
s = t = *pptr;
if (idigit(c = *s)) {
if (bracks >= 0)
ppar = zstrtol(s, &s, 10);
else
ppar = *s++ - '0';
}
else if ((ie = itype_end(s, itype, 0)) != s)
s = ie;
else if (c == Quest)
*s++ = '?';
else if (c == Pound)
*s++ = '#';
else if (c == String)
*s++ = '$';
else if (c == Qstring)
*s++ = '$';
else if (c == Star)
*s++ = '*';
else if (IS_DASH(c))
*s++ = '-';
else if (c == '#' || c == '?' || c == '$' ||
c == '!' || c == '@' || c == '*')
s++;
else
return NULL;
if ((sav = *s))
*s = '\0';
if (ppar) {
if (v)
memset(v, 0, sizeof(*v));
else
v = (Value) hcalloc(sizeof *v);
v->pm = argvparam;
v->flags = 0;
v->start = ppar - 1;
v->end = ppar;
if (sav)
*s = sav;
} else {
Param pm;
int isvarat;
isvarat = (t[0] == '@' && !t[1]);
if (flags & SCANPM_NONAMEREF)
pm = (Param) paramtab->getnode2(paramtab, *t == '0' ? "0" : t);
else
pm = (Param) paramtab->getnode(paramtab, *t == '0' ? "0" : t);
if (!pm && *t == '.' && !isident(t)) {
/* badly formed namespace reference */
if (sav)
*s = sav;
return NULL;
} else if (sav)
*s = sav;
*pptr = s;
if (!pm || ((pm->node.flags & PM_UNSET) &&
!(pm->node.flags & PM_DECLARED)))
return NULL;
if (v)
memset(v, 0, sizeof(*v));
else
v = (Value) hcalloc(sizeof *v);
if ((pm->node.flags & PM_NAMEREF) && !(flags & SCANPM_NONAMEREF)) {
char *refname = GETREFNAME(pm);
if (refname && *refname) {
/* only happens for namerefs pointing to array elements */
char *ref = dupstring(refname);
char *ss = pm->width ? ref + pm->width : NULL;
if (ss) {
sav = *ss;
*ss = 0;
}
Param p1 = (Param)gethashnode2(paramtab, ref);
if (!(p1 && (pm = upscope(p1, pm->base))) ||
((pm->node.flags & PM_UNSET) &&
!(pm->node.flags & PM_DECLARED)))
return NULL;
if (ss) {
flags |= SCANPM_NOEXEC;
*ss = sav;
s = dyncat(ss,*pptr);
} else
s = *pptr;
}
}
if (PM_TYPE(pm->node.flags) & (PM_ARRAY|PM_HASHED)) {
/* Overload v->isarr as the flag bits for hashed arrays. */
v->isarr = flags | (isvarat ? SCANPM_ISVAR_AT : 0);
/* If no flags were passed, we need something to represent *
* `true' yet differ from an explicit WANTVALS. Use a *
* special flag for this case. */
if (!v->isarr)
v->isarr = SCANPM_ARRONLY;
}
v->pm = pm;
v->flags = 0;
v->start = 0;
v->end = -1;
if (bracks > 0 && (*s == '[' || *s == Inbrack)) {
if (getindex(&s, v, flags)) {
*pptr = s;
return v;
}
} else if (!(flags & SCANPM_ASSIGNING) && v->isarr &&
itype_end(t, INAMESPC, 1) != t && isset(KSHARRAYS))
v->end = 1, v->isarr = 0;
}
if (!bracks && *s)
return NULL;
*pptr = s;
#if 0
/*
* Check for large subscripts that might be erroneous.
* This code is too gross in several ways:
* - the limit is completely arbitrary
* - the test vetoes operations on existing arrays
* - it's not at all clear a general test on large arrays of
* this kind is any use.
*
* Until someone comes up with workable replacement code it's
* therefore commented out.
*/
if (v->start > MAX_ARRLEN) {
zerr("subscript too %s: %d", "big", v->start + !isset(KSHARRAYS));
return NULL;
}
if (v->start < -MAX_ARRLEN) {
zerr("subscript too %s: %d", "small", v->start);
return NULL;
}
if (v->end > MAX_ARRLEN+1) {
zerr("subscript too %s: %d", "big", v->end - !!isset(KSHARRAYS));
return NULL;
}
if (v->end < -MAX_ARRLEN) {
zerr("subscript too %s: %d", "small", v->end);
return NULL;
}
#endif
return v;
}
/**/
mod_export char *
getstrvalue(Value v)
{
char *s, **ss;
char buf[BDIGBUFSIZE];
int len;
if (!v)
return hcalloc(1);
if ((v->flags & VALFLAG_INV) && !(v->pm->node.flags & PM_HASHED)) {
sprintf(buf, "%d", v->start);
s = dupstring(buf);
return s;
}
switch(PM_TYPE(v->pm->node.flags)) {
case PM_HASHED:
/* (!v->isarr) should be impossible unless emulating ksh */
if (!v->isarr && EMULATION(EMULATE_KSH)) {
s = dupstring("[0]");
if (getindex(&s, v, 0) == 0)
s = getstrvalue(v);
return s;
} /* else fall through */
case PM_ARRAY:
ss = getvaluearr(v);
if (v->isarr)
s = sepjoin(ss, NULL, 1);
else {
if (v->start < 0)
v->start += arrlen(ss);
s = (arrlen_le(ss, v->start) || v->start < 0) ?
(char *) hcalloc(1) : ss[v->start];
}
return s;
case PM_INTEGER:
convbase(buf, v->pm->gsu.i->getfn(v->pm), v->pm->base);
s = dupstring(buf);
break;
case PM_EFLOAT:
case PM_FFLOAT:
s = convfloat(v->pm->gsu.f->getfn(v->pm),
v->pm->base, v->pm->node.flags, NULL);
break;
case PM_SCALAR:
s = v->pm->gsu.s->getfn(v->pm);
break;
default:
s = "";
DPUTS(1, "BUG: param node without valid type");
break;
}
if (v->flags & VALFLAG_SUBST) {
if (v->pm->node.flags & (PM_LEFT|PM_RIGHT_B|PM_RIGHT_Z)) {
size_t fwidth = v->pm->width ? (unsigned int)v->pm->width : MB_METASTRLEN(s);
switch (v->pm->node.flags & (PM_LEFT | PM_RIGHT_B | PM_RIGHT_Z)) {
char *t, *tend;
size_t t0;
case PM_LEFT:
case PM_LEFT | PM_RIGHT_Z:
t = s;
if (v->pm->node.flags & PM_RIGHT_Z)
while (*t == '0')
t++;
else
while (iblank(*t))
t++;
MB_METACHARINIT();
for (tend = t, t0 = 0; t0 < fwidth && *tend; t0++)
tend += MB_METACHARLEN(tend);
/*
* t0 is the number of characters from t used,
* hence (fwidth - t0) is the number of padding
* characters. fwidth is a misnomer: we use
* character counts, not character widths.
*
* (tend - t) is the number of bytes we need
* to get fwidth characters or the entire string;
* the characters may be multiple bytes.
*/
fwidth -= t0; /* padding chars remaining */
t0 = tend - t; /* bytes to copy from string */
s = (char *) hcalloc(t0 + fwidth + 1);
memcpy(s, t, t0);
if (fwidth)
memset(s + t0, ' ', fwidth);
s[t0 + fwidth] = '\0';
break;
case PM_RIGHT_B:
case PM_RIGHT_Z:
case PM_RIGHT_Z | PM_RIGHT_B:
{
int zero = 1;
/* Calculate length in possibly multibyte chars */
unsigned int charlen = MB_METASTRLEN(s);
if (charlen < fwidth) {
char *valprefend = s;
int preflen;
if (v->pm->node.flags & PM_RIGHT_Z) {
/*
* This is a documented feature: when deciding
* whether to pad with zeroes, ignore
* leading blanks already in the value;
* only look for numbers after that.
* Not sure how useful this really is.
* It's certainly confusing to code around.
*/
for (t = s; iblank(*t); t++)
;
/*
* Allow padding after initial minus
* for numeric variables.
*/
if ((v->pm->node.flags &
(PM_INTEGER|PM_EFLOAT|PM_FFLOAT)) &&
*t == '-')
t++;
/*
* Allow padding after initial 0x or
* base# for integer variables.
*/
if (v->pm->node.flags & PM_INTEGER) {
if (isset(CBASES) &&
t[0] == '0' && t[1] == 'x')
t += 2;
else if ((valprefend = strchr(t, '#')))
t = valprefend + 1;
}
valprefend = t;
if (!*t)
zero = 0;
else if (v->pm->node.flags &
(PM_INTEGER|PM_EFLOAT|PM_FFLOAT)) {
/* zero always OK */
} else if (!idigit(*t))
zero = 0;
}
/* number of characters needed for padding */
fwidth -= charlen;
/* bytes from original string */
t0 = strlen(s);
t = (char *) hcalloc(fwidth + t0 + 1);
/* prefix guaranteed to be single byte chars */
preflen = valprefend - s;
memset(t + preflen,
(((v->pm->node.flags & PM_RIGHT_B)
|| !zero) ? ' ' : '0'), fwidth);
/*
* Copy - or 0x or base# before any padding
* zeroes.
*/
if (preflen)
memcpy(t, s, preflen);
memcpy(t + preflen + fwidth,
valprefend, t0 - preflen);
t[fwidth + t0] = '\0';
s = t;
} else {
/* Need to skip (charlen - fwidth) chars */
for (t0 = charlen - fwidth; t0; t0--)
s += MB_METACHARLEN(s);
}
}
break;
}
}
switch (v->pm->node.flags & (PM_LOWER | PM_UPPER)) {
case PM_LOWER:
s = casemodify(s, CASMOD_LOWER);
break;
case PM_UPPER:
s = casemodify(s, CASMOD_UPPER);
break;
}
}
if (v->start == 0 && v->end == -1)
return s;
len = strlen(s);
if (v->start < 0) {
v->start += len;
if (v->start < 0)
v->start = 0;
}
if (v->end < 0) {
v->end += len;
if (v->end >= 0) {
char *eptr = s + v->end;
if (*eptr)
v->end += MB_METACHARLEN(eptr);
}
}
s = (v->start > len) ? dupstring("") :
dupstring_wlen(s + v->start, len - v->start);
if (v->end <= v->start)
s[0] = '\0';
else if (v->end - v->start <= len - v->start)
s[v->end - v->start] = '\0';
return s;
}
static char *nular[] = {"", NULL};
/**/
mod_export char **
getarrvalue(Value v)
{
char **s;
if (!v)
return arrdup(nular);
else if (IS_UNSET_VALUE(v))
return arrdup(&nular[1]);
if (v->flags & VALFLAG_INV) {
char buf[DIGBUFSIZE];
s = arrdup(nular);
sprintf(buf, "%d", v->start);
s[0] = dupstring(buf);
return s;
}
s = getvaluearr(v);
if (v->start == 0 && v->end == -1)
return s;
if (v->start < 0)
v->start += arrlen(s);
if (v->end < 0)
v->end += arrlen(s) + 1;
/* Null if 1) array too short, 2) index still negative */
if (v->end <= v->start) {
s = arrdup_max(nular, 0);
}
else if (v->start < 0) {
s = arrdup_max(nular, 1);
}
else if (arrlen_le(s, v->start)) {
/* Handle $ary[i,i] consistently for any $i > $#ary
* and $ary[i,j] consistently for any $j > $i > $#ary
*/
s = arrdup_max(nular, v->end - (v->start + 1));
}
else {
/* Copy to a point before the end of the source array:
* arrdup_max will copy at most v->end - v->start elements,
* starting from v->start element. Original code said:
* s[v->end - v->start] = NULL
* which means that there are exactly the same number of
* elements as the value of the above *0-based* index.
*/
s = arrdup_max(s + v->start, v->end - v->start);
}
return s;
}
/**/
mod_export zlong
getintvalue(Value v)
{
if (!v)
return 0;
if (v->flags & VALFLAG_INV)
return v->start;
if (v->isarr) {
char **arr = getarrvalue(v);
if (arr) {
char *scal = sepjoin(arr, NULL, 1);
return mathevali(scal);
} else
return 0;
}
if (PM_TYPE(v->pm->node.flags) == PM_INTEGER)
return v->pm->gsu.i->getfn(v->pm);
if (v->pm->node.flags & (PM_EFLOAT|PM_FFLOAT))
return (zlong)v->pm->gsu.f->getfn(v->pm);
return mathevali(getstrvalue(v));
}
/**/
mnumber
getnumvalue(Value v)
{
mnumber mn;
mn.type = MN_INTEGER;
if (!v) {
mn.u.l = 0;
} else if (v->flags & VALFLAG_INV) {
mn.u.l = v->start;
} else if (v->isarr) {
char **arr = getarrvalue(v);
if (arr) {
char *scal = sepjoin(arr, NULL, 1);
return matheval(scal);
} else
mn.u.l = 0;
} else if (PM_TYPE(v->pm->node.flags) == PM_INTEGER) {
mn.u.l = v->pm->gsu.i->getfn(v->pm);
} else if (v->pm->node.flags & (PM_EFLOAT|PM_FFLOAT)) {
mn.type = MN_FLOAT;
mn.u.d = v->pm->gsu.f->getfn(v->pm);
} else
return matheval(getstrvalue(v));
return mn;
}
/**/
void
export_param(Param pm)
{
char buf[BDIGBUFSIZE], *val;
if (PM_TYPE(pm->node.flags) & (PM_ARRAY|PM_HASHED)) {
#if 0 /* Requires changes elsewhere in params.c and builtin.c */
if (EMULATION(EMULATE_KSH) /* isset(KSHARRAYS) */) {
struct value v;
v.isarr = 1;
v.flags = 0;
v.start = 0;
v.end = -1;
val = getstrvalue(&v);
} else
#endif
return;
} else if (PM_TYPE(pm->node.flags) == PM_INTEGER)
convbase(val = buf, pm->gsu.i->getfn(pm), pm->base);
else if (pm->node.flags & (PM_EFLOAT|PM_FFLOAT))
val = convfloat(pm->gsu.f->getfn(pm), pm->base,
pm->node.flags, NULL);
else
val = pm->gsu.s->getfn(pm);
addenv(pm, val);
}
/**/
mod_export void
setstrvalue(Value v, char *val)
{
assignstrvalue(v, val, 0);
}
/**/
mod_export void
assignstrvalue(Value v, char *val, int flags)
{
if (unset(EXECOPT))
return;
if (v->pm->node.flags & PM_READONLY) {
zerr("read-only variable: %s", v->pm->node.nam);
zsfree(val);
return;
}
if ((v->pm->node.flags & PM_RESTRICTED) && isset(RESTRICTED)) {
zerr("%s: restricted", v->pm->node.nam);
zsfree(val);
return;
}
if ((v->pm->node.flags & PM_HASHED) &&
(v->isarr & (SCANPM_MATCHMANY|SCANPM_ARRONLY))) {
zerr("%s: attempt to set slice of associative array", v->pm->node.nam);
zsfree(val);
return;
}
if (v->flags & VALFLAG_EMPTY) {
zerr("%s: assignment to invalid subscript range", v->pm->node.nam);
zsfree(val);
return;
}
v->pm->node.flags &= ~PM_UNSET;
switch (PM_TYPE(v->pm->node.flags)) {
case PM_SCALAR:
if (v->start == 0 && v->end == -1) {
v->pm->gsu.s->setfn(v->pm, val);
if ((v->pm->node.flags & (PM_LEFT | PM_RIGHT_B | PM_RIGHT_Z)) &&
!v->pm->width)
v->pm->width = strlen(val);
} else {
char *z, *x;
int zlen, vlen, newsize;
z = v->pm->gsu.s->getfn(v->pm);
zlen = strlen(z);
if ((v->flags & VALFLAG_INV) && unset(KSHARRAYS))
v->start--, v->end--;
if (v->start < 0) {
v->start += zlen;
if (v->start < 0)
v->start = 0;
}
if (v->start > zlen)
v->start = zlen;
if (v->end < 0) {
v->end += zlen;
if (v->end < 0) {
v->end = 0;
} else if (v->end >= zlen) {
v->end = zlen;
} else {
#ifdef MULTIBYTE_SUPPORT
if (isset(MULTIBYTE)) {
v->end += MB_METACHARLEN(z + v->end);
} else {
v->end++;
}
#else
v->end++;
#endif
}
}
else if (v->end > zlen)
v->end = zlen;
vlen = strlen(val);
/* Characters preceding start index +
characters of what is assigned +
characters following end index */
newsize = v->start + vlen + (zlen - v->end);
/* Does new size differ? */
if (newsize != zlen || v->pm->gsu.s->setfn != strsetfn) {
x = (char *) zalloc(newsize + 1);
strncpy(x, z, v->start);
strcpy(x + v->start, val);
strcat(x + v->start, z + v->end);
v->pm->gsu.s->setfn(v->pm, x);
} else {
Param pm = v->pm;
/* Size doesn't change, can limit actions to only
* overwriting bytes in already allocated string */
memcpy(z + v->start, val, vlen);
/* Implement remainder of strsetfn */
if (!(pm->node.flags & PM_HASHELEM) &&
((pm->node.flags & PM_NAMEDDIR) ||
isset(AUTONAMEDIRS))) {
pm->node.flags |= PM_NAMEDDIR;
adduserdir(pm->node.nam, z, 0, 0);
}
}
zsfree(val);
}
break;
case PM_INTEGER:
if (val) {
zlong ival;
if (flags & ASSPM_ENV_IMPORT) {
char *ptr;
ival = zstrtol_underscore(val, &ptr, 0, 1);
} else
ival = mathevali(val);
v->pm->gsu.i->setfn(v->pm, ival);
if ((v->pm->node.flags & (PM_LEFT | PM_RIGHT_B | PM_RIGHT_Z)) &&
!v->pm->width)
v->pm->width = strlen(val);
zsfree(val);
}
if (!v->pm->base && lastbase != -1)
v->pm->base = lastbase;
break;
case PM_EFLOAT:
case PM_FFLOAT:
if (val) {
mnumber mn;
if (flags & ASSPM_ENV_IMPORT) {
char *ptr;
mn.type = MN_FLOAT;
mn.u.d = strtod(val, &ptr);
} else
mn = matheval(val);
v->pm->gsu.f->setfn(v->pm, (mn.type & MN_FLOAT) ? mn.u.d :
(double)mn.u.l);
if ((v->pm->node.flags & (PM_LEFT | PM_RIGHT_B | PM_RIGHT_Z)) &&
!v->pm->width)
v->pm->width = strlen(val);
zsfree(val);
}
break;
case PM_ARRAY:
{
char **ss = (char **) zalloc(2 * sizeof(char *));
ss[0] = val;
ss[1] = NULL;
setarrvalue(v, ss);
}
break;
case PM_HASHED:
{
if (foundparam == NULL)
{
zerr("%s: attempt to set associative array to scalar",
v->pm->node.nam);
zsfree(val);
return;
}
else
foundparam->gsu.s->setfn(foundparam, val);
}
break;
}
setscope(v->pm);
if ((!v->pm->env && !(v->pm->node.flags & PM_EXPORTED) &&
!(isset(ALLEXPORT) && !(v->pm->node.flags & PM_HASHELEM))) ||
(v->pm->node.flags & PM_ARRAY) || v->pm->ename)
return;
export_param(v->pm);
}
/**/
void
setnumvalue(Value v, mnumber val)
{
char buf[BDIGBUFSIZE], *p;
if (unset(EXECOPT))
return;
if (v->pm->node.flags & PM_READONLY) {
zerr("read-only variable: %s", v->pm->node.nam);
return;
}
if ((v->pm->node.flags & PM_RESTRICTED) && isset(RESTRICTED)) {
zerr("%s: restricted", v->pm->node.nam);
return;
}
switch (PM_TYPE(v->pm->node.flags)) {
case PM_SCALAR:
case PM_ARRAY:
if ((val.type & MN_INTEGER) || outputradix) {
if (!(val.type & MN_INTEGER))
val.u.l = (zlong) val.u.d;
p = convbase_underscore(buf, val.u.l, outputradix,
outputunderscore);
} else
p = convfloat_underscore(val.u.d, outputunderscore);
setstrvalue(v, ztrdup(p));
break;
case PM_INTEGER:
v->pm->gsu.i->setfn(v->pm, (val.type & MN_INTEGER) ? val.u.l :
(zlong) val.u.d);
setstrvalue(v, NULL);
break;
case PM_EFLOAT:
case PM_FFLOAT:
v->pm->gsu.f->setfn(v->pm, (val.type & MN_INTEGER) ?
(double)val.u.l : val.u.d);
setstrvalue(v, NULL);
break;
}
}
/**/
mod_export void
setarrvalue(Value v, char **val)
{
if (unset(EXECOPT))
return;
if (v->pm->node.flags & PM_READONLY) {
zerr("read-only variable: %s", v->pm->node.nam);
freearray(val);
return;
}
if ((v->pm->node.flags & PM_RESTRICTED) && isset(RESTRICTED)) {
zerr("%s: restricted", v->pm->node.nam);
freearray(val);
return;
}
if (!(PM_TYPE(v->pm->node.flags) & (PM_ARRAY|PM_HASHED))) {
freearray(val);
zerr("%s: attempt to assign array value to non-array",
v->pm->node.nam);
return;
}
if (v->flags & VALFLAG_EMPTY) {
zerr("%s: assignment to invalid subscript range", v->pm->node.nam);
freearray(val);
return;
}
if (v->start == 0 && v->end == -1) {
if (PM_TYPE(v->pm->node.flags) == PM_HASHED)
arrhashsetfn(v->pm, val, 0);
else
v->pm->gsu.a->setfn(v->pm, val);
} else if (v->start == -1 && v->end == 0 &&
PM_TYPE(v->pm->node.flags) == PM_HASHED) {
arrhashsetfn(v->pm, val, ASSPM_AUGMENT);
} else if ((PM_TYPE(v->pm->node.flags) == PM_HASHED)) {
freearray(val);
zerr("%s: attempt to set slice of associative array",
v->pm->node.nam);
return;
} else {
char **const old = v->pm->gsu.a->getfn(v->pm);
char **new;
char **p, **q, **r; /* index variables */
const int pre_assignment_length = arrlen(old);
int post_assignment_length;
int i;
q = old;
if ((v->flags & VALFLAG_INV) && unset(KSHARRAYS)) {
if (v->start > 0)
v->start--;
v->end--;
}
if (v->start < 0) {
v->start += pre_assignment_length;
if (v->start < 0)
v->start = 0;
}
if (v->end < 0) {
v->end += pre_assignment_length + 1;
if (v->end < 0)
v->end = 0;
}
if (v->end < v->start)
v->end = v->start;
post_assignment_length = v->start + arrlen(val);
if (v->end < pre_assignment_length) {
/*
* Allocate room for array elements between the end of the slice `v'
* and the original array's end.
*/
post_assignment_length += pre_assignment_length - v->end;
}
if (pre_assignment_length == post_assignment_length
&& v->pm->gsu.a->setfn == arrsetfn
/* ... and isn't something that arrsetfn() treats specially */
&& 0 == (v->pm->node.flags & (PM_SPECIAL|PM_UNIQUE))
&& NULL == v->pm->ename)
{
/* v->start is 0-based */
p = old + v->start;
for (r = val; *r;) {
/* Free previous string */
zsfree(*p);
/* Give away ownership of the string */
*p++ = *r++;
}
} else {
/* arr+=( ... )
* arr[${#arr}+x,...]=( ... ) */
if (post_assignment_length > pre_assignment_length &&
pre_assignment_length <= v->start &&
pre_assignment_length > 0 &&
v->pm->gsu.a->setfn == arrsetfn)
{
p = new = (char **) zrealloc(old, sizeof(char *)
* (post_assignment_length + 1));
p += pre_assignment_length; /* after old elements */
/* Consider 1 < 0, case for a=( 1 ); a[1,..] =
* 1 < 1, case for a=( 1 ); a[2,..] = */
if (pre_assignment_length < v->start) {
for (i = pre_assignment_length; i < v->start; i++) {
*p++ = ztrdup("");
}
}
for (r = val; *r;) {
/* Give away ownership of the string */
*p++ = *r++;
}
/* v->end doesn't matter:
* a=( 1 2 ); a[4,100]=( a b ); echo "${(q@)a}"
* 1 2 '' a b */
*p = NULL;
v->pm->u.arr = NULL;
v->pm->gsu.a->setfn(v->pm, new);
} else {
p = new = (char **) zalloc(sizeof(char *)
* (post_assignment_length + 1));
for (i = 0; i < v->start; i++)
*p++ = i < pre_assignment_length ? ztrdup(*q++) : ztrdup("");
for (r = val; *r;) {
/* Give away ownership of the string */
*p++ = *r++;
}
if (v->end < pre_assignment_length)
for (q = old + v->end; *q;)
*p++ = ztrdup(*q++);
*p = NULL;
v->pm->gsu.a->setfn(v->pm, new);
}
DPUTS2(p - new != post_assignment_length, "setarrvalue: wrong allocation: %d 1= %lu",
post_assignment_length, (unsigned long)(p - new));
}
/* Ownership of all strings has been
* given away, can plainly free */
free(val);
}
}
/* Retrieve an integer parameter */
/**/
mod_export zlong
getiparam(char *s)
{
struct value vbuf;
Value v;
if (!(v = getvalue(&vbuf, &s, 1)))
return 0;
return getintvalue(v);
}
/* Retrieve a numerical parameter, either integer or floating */
/**/
mnumber
getnparam(char *s)
{
struct value vbuf;
Value v;
if (!(v = getvalue(&vbuf, &s, 1))) {
mnumber mn;
mn.type = MN_INTEGER;
mn.u.l = 0;
return mn;
}
return getnumvalue(v);
}
/* Retrieve a scalar (string) parameter */
/**/
mod_export char *
getsparam(char *s)
{
struct value vbuf;
Value v;
if (!(v = getvalue(&vbuf, &s, 0)))
return NULL;
return getstrvalue(v);
}
/**/
mod_export char *
getsparam_u(char *s)
{
if ((s = getsparam(s)))
return unmetafy(s, NULL);
return s;
}
/* Retrieve an array parameter */
/**/
mod_export char **
getaparam(char *s)
{
struct value vbuf;
Value v;
if (!idigit(*s) && (v = getvalue(&vbuf, &s, 0)) &&
PM_TYPE(v->pm->node.flags) == PM_ARRAY)
return v->pm->gsu.a->getfn(v->pm);
return NULL;
}
/* Retrieve an assoc array parameter as an array */
/**/
mod_export char **
gethparam(char *s)
{
struct value vbuf;
Value v;
if (!idigit(*s) && (v = getvalue(&vbuf, &s, 0)) &&
PM_TYPE(v->pm->node.flags) == PM_HASHED)
return paramvalarr(v->pm->gsu.h->getfn(v->pm), SCANPM_WANTVALS);
return NULL;
}
/* Retrieve the keys of an assoc array parameter as an array */
/**/
mod_export char **
gethkparam(char *s)
{
struct value vbuf;
Value v;
if (!idigit(*s) && (v = getvalue(&vbuf, &s, 0)) &&
PM_TYPE(v->pm->node.flags) == PM_HASHED)
return paramvalarr(v->pm->gsu.h->getfn(v->pm), SCANPM_WANTKEYS);
return NULL;
}
/*
* Function behind WARNCREATEGLOBAL and WARNNESTEDVAR option.
*
* For WARNNESTEDVAR:
* Called when the variable is created.
* Apply heuristics to see if this variable was just created
* globally but in a local context.
*
* For WARNNESTEDVAR:
* Called when the variable already exists and is set.
* Apply heuristics to see if this variable is setting
* a variable that was created in a less nested function
* or globally.
*/
/**/
static void
check_warn_pm(Param pm, const char *pmtype, int created,
int may_warn_about_nested_vars)
{
Funcstack i;
if (!may_warn_about_nested_vars && !created)
return;
if (created && isset(WARNCREATEGLOBAL)) {
if (locallevel <= forklevel || pm->level != 0)
return;
} else if (!created && isset(WARNNESTEDVAR)) {
if (pm->level >= locallevel)
return;
} else
return;
if (pm->node.flags & (PM_SPECIAL|PM_NAMEREF))
return;
for (i = funcstack; i; i = i->prev) {
if (i->tp == FS_FUNC) {
char *msg;
DPUTS(!i->name, "funcstack entry with no name");
msg = created ?
"%s parameter %s created globally in function %s" :
"%s parameter %s set in enclosing scope in function %s";
zwarn(msg, pmtype, pm->node.nam, i->name);
break;
}
}
}
/**/
mod_export Param
assignsparam(char *s, char *val, int flags)
{
struct value vbuf;
Value v;
char *t = s;
char *ss, *copy, *var;
size_t lvar;
mnumber lhs, rhs;
int sstart, created = 0;
if (!isident(s)) {
zerr("not an identifier: %s", s);
zsfree(val);
errflag |= ERRFLAG_ERROR;
return NULL;
}
queue_signals();
if ((ss = strchr(s, '['))) {
*ss = '\0';
if (!(v = getvalue(&vbuf, &s, 1))) {
createparam(t, PM_ARRAY);
created = 1;
} else {
if (v->pm->node.flags & PM_READONLY) {
zerr("read-only variable: %s", v->pm->node.nam);
*ss = '[';
zsfree(val);
unqueue_signals();
return NULL;
}
/*
* Parameter defined here is a temporary bogus one.
* Don't warn about anything.
*/
flags &= ~ASSPM_WARN;
v->pm->node.flags &= ~PM_DEFAULTED;
}
*ss = '[';
v = NULL;
} else {
if (!(v = getvalue(&vbuf, &s, 1))) {
createparam(t, PM_SCALAR);
created = 1;
} else if ((((v->pm->node.flags & PM_ARRAY) && !(flags & ASSPM_AUGMENT)) ||
(v->pm->node.flags & PM_HASHED)) &&
!(v->pm->node.flags & (PM_SPECIAL|PM_TIED)) &&
unset(KSHARRAYS)) {
unsetparam(t);
createparam(t, PM_SCALAR);
/* not regarded as a new creation */
v = NULL;
}
}
if (!v && !(v = getvalue(&vbuf, &t, 1))) {
zsfree(val);
unqueue_signals();
/* errflag |= ERRFLAG_ERROR; */
return NULL;
}
if (*val && (v->pm->node.flags & PM_NAMEREF)) {
if (!valid_refname(val)) {
zerr("invalid variable name: %s", val);
zsfree(val);
unqueue_signals();
errflag |= ERRFLAG_ERROR;
return NULL;
}
}
if (flags & ASSPM_WARN)
check_warn_pm(v->pm, "scalar", created, 1);
v->pm->node.flags &= ~PM_DEFAULTED;
if (flags & ASSPM_AUGMENT) {
if (v->start == 0 && v->end == -1) {
switch (PM_TYPE(v->pm->node.flags)) {
case PM_SCALAR:
v->start = INT_MAX; /* just append to scalar value */
break;
case PM_INTEGER:
case PM_EFLOAT:
case PM_FFLOAT:
rhs = matheval(val);
lhs = getnumvalue(v);
if (lhs.type == MN_FLOAT) {
if ((rhs.type) == MN_FLOAT)
lhs.u.d = lhs.u.d + rhs.u.d;
else
lhs.u.d = lhs.u.d + (double)rhs.u.l;
} else {
if ((rhs.type) == MN_INTEGER)
lhs.u.l = lhs.u.l + rhs.u.l;
else
lhs.u.l = lhs.u.l + (zlong)rhs.u.d;
}
setnumvalue(v, lhs);
zsfree(val);
unqueue_signals();
return v->pm; /* avoid later setstrvalue() call */
case PM_ARRAY:
if (unset(KSHARRAYS)) {
v->start = arrlen(v->pm->gsu.a->getfn(v->pm));
v->end = v->start + 1;
} else {
/* ksh appends scalar to first element */
v->end = 1;
goto kshappend;
}
break;
}
} else {
switch (PM_TYPE(v->pm->node.flags)) {
case PM_SCALAR:
if (v->end > 0)
v->start = v->end;
else
v->start = v->end = strlen(v->pm->gsu.s->getfn(v->pm)) +
v->end + 1;
break;
case PM_INTEGER:
case PM_EFLOAT:
case PM_FFLOAT:
zsfree(val);
unqueue_signals();
zerr("attempt to add to slice of a numeric variable");
return NULL;
case PM_ARRAY:
kshappend:
/* treat slice as the end element */
v->start = sstart = v->end > 0 ? v->end - 1 : v->end;
v->isarr = 0;
var = getstrvalue(v);
v->start = sstart;
copy = val;
lvar = strlen(var);
val = (char *)zalloc(lvar + strlen(val) + 1);
strcpy(val, var);
strcpy(val + lvar, copy);
zsfree(copy);
break;
}
}
}
assignstrvalue(v, val, flags);
unqueue_signals();
return v->pm;
}
/**/
mod_export Param
setsparam(char *s, char *val)
{
return assignsparam(s, val, ASSPM_WARN);
}
/**/
mod_export Param
assignaparam(char *s, char **val, int flags)
{
struct value vbuf;
Value v;
char *t = s;
char *ss;
int created = 0;
int may_warn_about_nested_vars = 1;
if (!isident(s)) {
zerr("not an identifier: %s", s);
freearray(val);
errflag |= ERRFLAG_ERROR;
return NULL;
}
queue_signals();
if ((ss = strchr(s, '['))) {
*ss = '\0';
if (!(v = getvalue(&vbuf, &s, 1))) {
createparam(t, PM_ARRAY);
created = 1;
} else {
may_warn_about_nested_vars = 0;
}
*ss = '[';
if (v && PM_TYPE(v->pm->node.flags) == PM_HASHED) {
unqueue_signals();
zerr("%s: attempt to set slice of associative array",
v->pm->node.nam);
freearray(val);
errflag |= ERRFLAG_ERROR;
return NULL;
}
v = NULL;
} else {
if (!(v = fetchvalue(&vbuf, &s, 1, SCANPM_ASSIGNING))) {
createparam(t, PM_ARRAY);
created = 1;
} else if (!(PM_TYPE(v->pm->node.flags) & (PM_ARRAY|PM_HASHED)) &&
!(v->pm->node.flags & (PM_SPECIAL|PM_TIED))) {
int uniq = v->pm->node.flags & PM_UNIQUE;
if ((flags & ASSPM_AUGMENT) && !(v->pm->node.flags & PM_UNSET)) {
/* insert old value at the beginning of the val array */
char **new;
int lv = arrlen(val);
new = (char **) zalloc(sizeof(char *) * (lv + 2));
*new = ztrdup(getstrvalue(v));
memcpy(new+1, val, sizeof(char *) * (lv + 1));
free(val);
val = new;
}
unsetparam(t);
createparam(t, PM_ARRAY | uniq);
v = NULL;
}
}
if (!v)
if (!(v = fetchvalue(&vbuf, &t, 1, SCANPM_ASSIGNING))) {
unqueue_signals();
freearray(val);
/* errflag |= ERRFLAG_ERROR; */
return NULL;
}
if (flags & ASSPM_WARN)
check_warn_pm(v->pm, "array", created, may_warn_about_nested_vars);
v->pm->node.flags &= ~PM_DEFAULTED;
/*
* At this point, we may have array entries consisting of
* - a Marker element --- normally allocated array entry but
* with just Marker char and null
* - an array index element --- as normal for associative array,
* but non-standard for normal array which we handle now.
* - a value for the indexed element.
* This only applies if the flag ASSPM_KEY_VALUE is passed in,
* indicating prefork() detected this syntax.
*
* For associative arrays we just junk the Marker elements.
*/
if (flags & ASSPM_KEY_VALUE) {
char **aptr;
if (PM_TYPE(v->pm->node.flags) & PM_ARRAY) {
/*
* This is an ordinary array with key / value pairs.
*/
int maxlen, origlen, nextind;
char **fullval, **origptr;
zlong *subscripts = (zlong *)zhalloc(arrlen(val) * sizeof(zlong));
zlong *iptr = subscripts;
if (flags & ASSPM_AUGMENT) {
origptr = v->pm->gsu.a->getfn(v->pm);
maxlen = origlen = arrlen(origptr);
} else {
maxlen = origlen = 0;
origptr = NULL;
}
nextind = 0;
for (aptr = val; *aptr; ) {
if (**aptr == Marker) {
*iptr = mathevali(*++aptr);
if (*iptr < 0 ||
(!isset(KSHARRAYS) && *iptr == 0)) {
unqueue_signals();
zerr("bad subscript for direct array assignment: %s", *aptr);
freearray(val);
return NULL;
}
if (!isset(KSHARRAYS))
--*iptr;
nextind = *iptr + 1;
++iptr;
aptr += 2;
} else {
++nextind;
++aptr;
}
if (nextind > maxlen)
maxlen = nextind;
}
fullval = zshcalloc((maxlen+1) * sizeof(char *));
if (!fullval) {
zerr("array too large");
freearray(val);
return NULL;
}
fullval[maxlen] = NULL;
if (flags & ASSPM_AUGMENT) {
char **srcptr = origptr;
for (aptr = fullval; aptr <= fullval + origlen; aptr++) {
*aptr = ztrdup(*srcptr);
srcptr++;
}
}
iptr = subscripts;
nextind = 0;
for (aptr = val; *aptr; ++aptr) {
char *old;
if (**aptr == Marker) {
int augment = ((*aptr)[1] == '+');
zsfree(*aptr);
zsfree(*++aptr); /* Index, no longer needed */
old = fullval[*iptr];
if (augment && old) {
fullval[*iptr] = bicat(old, *++aptr);
zsfree(*aptr);
} else {
fullval[*iptr] = *++aptr;
}
nextind = *iptr + 1;
++iptr;
} else {
old = fullval[nextind];
fullval[nextind] = *aptr;
++nextind;
}
if (old)
zsfree(old);
/* aptr now on value in both cases */
}
if (*aptr) { /* Shouldn't be possible */
DPUTS(1, "Extra element in key / value array");
zsfree(*aptr);
}
free(val);
for (aptr = fullval; aptr < fullval + maxlen; aptr++) {
/*
* Remember we don't have sparse arrays but and they're null
* terminated --- so any value we don't set has to be an
* empty string.
*/
if (!*aptr)
*aptr = ztrdup("");
}
setarrvalue(v, fullval);
unqueue_signals();
return v->pm;
} else if (PM_TYPE(v->pm->node.flags & PM_HASHED)) {
/*
* We strictly enforce [key]=value syntax for associative
* arrays. Marker can only indicate a Marker / key / value
* triad; it cannot be there by accident.
*
* It's too inefficient to strip Markers here, and they
* can't be there in the other form --- so just ignore
* them willy nilly lower down.
*/
for (aptr = val; *aptr; aptr += 3) {
if (**aptr != Marker) {
unqueue_signals();
freearray(val);
zerr("bad [key]=value syntax for associative array");
return NULL;
}
}
} else {
unqueue_signals();
freearray(val);
zerr("invalid use of [key]=value assignment syntax");
return NULL;
}
}
if (flags & ASSPM_AUGMENT) {
if (v->start == 0 && v->end == -1) {
if (PM_TYPE(v->pm->node.flags) & PM_ARRAY) {
v->start = arrlen(v->pm->gsu.a->getfn(v->pm));
v->end = v->start + 1;
} else if (PM_TYPE(v->pm->node.flags) & PM_HASHED)
v->start = -1, v->end = 0;
} else {
if (v->end > 0)
v->start = v->end--;
else if (PM_TYPE(v->pm->node.flags) & PM_ARRAY) {
v->end = arrlen(v->pm->gsu.a->getfn(v->pm)) + v->end;
v->start = v->end + 1;
}
}
}
setarrvalue(v, val);
unqueue_signals();
return v->pm;
}
/**/
mod_export Param
setaparam(char *s, char **aval)
{
return assignaparam(s, aval, ASSPM_WARN);
}
/**/
mod_export Param
sethparam(char *s, char **val)
{
struct value vbuf;
Value v;
char *t = s;
int checkcreate = 0;
if (!isident(s)) {
zerr("not an identifier: %s", s);
freearray(val);
errflag |= ERRFLAG_ERROR;
return NULL;
}
if (strchr(s, '[')) {
freearray(val);
zerr("nested associative arrays not yet supported");
errflag |= ERRFLAG_ERROR;
return NULL;
}
if (unset(EXECOPT))
return NULL;
queue_signals();
if (!(v = fetchvalue(&vbuf, &s, 1, SCANPM_ASSIGNING))) {
createparam(t, PM_HASHED);
checkcreate = 1;
} else if (!(PM_TYPE(v->pm->node.flags) & PM_HASHED)) {
if (!(v->pm->node.flags & PM_SPECIAL)) {
unsetparam(t);
/* no WARNCREATEGLOBAL check here as parameter already existed */
createparam(t, PM_HASHED);
v = NULL;
} else {
zerr("%s: can't change type of a special parameter", t);
unqueue_signals();
return NULL;
}
}
if (!v)
if (!(v = fetchvalue(&vbuf, &t, 1, SCANPM_ASSIGNING))) {
unqueue_signals();
/* errflag |= ERRFLAG_ERROR; */
return NULL;
}
check_warn_pm(v->pm, "associative array", checkcreate, 1);
v->pm->node.flags &= ~PM_DEFAULTED;
setarrvalue(v, val);
unqueue_signals();
return v->pm;
}
/*
* Set a generic shell number, floating point or integer.
* Option to warn on setting.
*/
/**/
mod_export Param
assignnparam(char *s, mnumber val, int flags)
{
struct value vbuf;
Value v;
char *t = s, *ss;
Param pm;
int was_unset = 0;
if (!isident(s)) {
zerr("not an identifier: %s", s);
errflag |= ERRFLAG_ERROR;
return NULL;
}
if (unset(EXECOPT))
return NULL;
queue_signals();
ss = strchr(s, '[');
v = getvalue(&vbuf, &s, 1);
if (v && (v->pm->node.flags & (PM_ARRAY|PM_HASHED)) &&
!(v->pm->node.flags & (PM_SPECIAL|PM_TIED)) &&
/*
* not sure what KSHARRAYS has got to do with this...
* copied this from assignsparam().
*/
unset(KSHARRAYS) && !ss) {
unsetparam_pm(v->pm, 0, 1);
was_unset = 1;
s = t;
v = NULL;
}
if (!v) {
/* s has been updated by getvalue, so check again */
ss = strchr(s, '[');
if (ss)
*ss = '\0';
pm = createparam(t, ss ? PM_ARRAY :
isset(POSIXIDENTIFIERS) ? PM_SCALAR :
(val.type & MN_INTEGER) ? PM_INTEGER : PM_FFLOAT);
if (errflag) {
/* assume error message already output */
unqueue_signals();
return NULL;
}
if (!pm && !(pm = (Param) paramtab->getnode(paramtab, t))) {
DPUTS(!pm, "BUG: parameter not created");
if (!errflag)
zerr("%s: parameter not found", t);
unqueue_signals();
return NULL;
}
if (ss) {
*ss = '[';
} else if (val.type & MN_INTEGER) {
pm->base = outputradix;
}
if (!(v = getvalue(&vbuf, &t, 1))) {
DPUTS(!v, "BUG: value not found for new parameter");
/* errflag |= ERRFLAG_ERROR; */
unqueue_signals();
return NULL;
}
if (flags & ASSPM_WARN)
check_warn_pm(v->pm, "numeric", !was_unset, 1);
} else {
if (flags & ASSPM_WARN)
check_warn_pm(v->pm, "numeric", 0, 1);
}
v->pm->node.flags &= ~PM_DEFAULTED;
setnumvalue(v, val);
unqueue_signals();
return v->pm;
}
/*
* Set a generic shell number, floating point or integer.
* Warn on setting based on option.
*/
/**/
mod_export Param
setnparam(char *s, mnumber val)
{
return assignnparam(s, val, ASSPM_WARN);
}
/* Simplified interface to assignnparam */
/**/
mod_export Param
assigniparam(char *s, zlong val, int flags)
{
mnumber mnval;
mnval.type = MN_INTEGER;
mnval.u.l = val;
return assignnparam(s, mnval, flags);
}
/* Simplified interface to setnparam */
/**/
mod_export Param
setiparam(char *s, zlong val)
{
mnumber mnval;
mnval.type = MN_INTEGER;
mnval.u.l = val;
return assignnparam(s, mnval, ASSPM_WARN);
}
/*
* Set an integer parameter without forcing creation of an integer type.
* This is useful if the integer is going to be set to a parameter which
* would usually be scalar but may not exist.
*/
/**/
mod_export Param
setiparam_no_convert(char *s, zlong val)
{
/*
* If the target is already an integer, this gets converted
* back. Low technology rules.
*/
char buf[BDIGBUFSIZE];
convbase(buf, val, 10);
return assignsparam(s, ztrdup(buf), ASSPM_WARN);
}
/* Unset a parameter */
/**/
mod_export void
unsetparam(char *s)
{
Param pm;
queue_signals();
if ((pm = (Param) (paramtab == realparamtab ?
/* getnode2() to avoid autoloading */
paramtab->getnode2(paramtab, s) :
paramtab->getnode(paramtab, s))) &&
!(pm->node.flags & PM_NAMEREF))
unsetparam_pm(pm, 0, 1);
unqueue_signals();
}
/* Unset a parameter
*
* altflag: if true, don't remove pm->ename from the environment
* exp: See stdunsetfn()
*/
/**/
mod_export int
unsetparam_pm(Param pm, int altflag, int exp)
{
Param oldpm, altpm;
char *altremove;
if ((pm->node.flags & PM_READONLY) && pm->level <= locallevel) {
zerr("read-only %s: %s",
(pm->node.flags & PM_NAMEREF) ? "reference" : "variable",
pm->node.nam);
return 1;
}
if ((pm->node.flags & PM_RESTRICTED) && isset(RESTRICTED)) {
zerr("%s: restricted", pm->node.nam);
return 1;
}
if (pm->ename && !altflag)
altremove = ztrdup(pm->ename);
else
altremove = NULL;
pm->node.flags &= ~PM_DECLARED; /* like ksh, not like bash */
if (!(pm->node.flags & PM_UNSET))
pm->gsu.s->unsetfn(pm, exp);
if (pm->env)
delenv(pm);
/* remove it under its alternate name if necessary */
if (altremove) {
altpm = (Param) paramtab->getnode(paramtab, altremove);
/* tied parameters are at the same local level as each other */
oldpm = NULL;
/*
* Look for param under alternate name hidden by a local.
* If this parameter is special, however, the visible
* parameter is the special and the hidden one is keeping
* an old value --- we just mark the visible one as unset.
*/
if (altpm && !(altpm->node.flags & PM_SPECIAL))
{
while (altpm && altpm->level > pm->level) {
oldpm = altpm;
altpm = altpm->old;
}
}
if (altpm) {
if (oldpm && !altpm->level) {
oldpm->old = NULL;
/* fudge things so removenode isn't called */
altpm->level = 1;
}
unsetparam_pm(altpm, 1, exp); /* This resets pm to empty */
pm->node.flags |= PM_UNSET; /* so we must repeat this */
}
zsfree(altremove);
if (!(pm->node.flags & PM_SPECIAL)) {
pm->gsu.s = &stdscalar_gsu;
pm->node.flags &= ~PM_ARRAY;
}
}
/*
* If this was a local variable, we need to keep the old
* struct so that it is resurrected at the right level.
* This is partly because when an array/scalar value is set
* and the parameter used to be the other sort, unsetparam()
* is called. Beyond that, there is an ambiguity: should
* foo() { local bar; unset bar; } make the global bar
* available or not? The following makes the answer "no".
*
* Some specials, such as those used in zle, still need removing
* from the parameter table; they have the PM_REMOVABLE flag.
*/
if ((pm->level && locallevel >= pm->level) ||
(pm->node.flags & (PM_SPECIAL|PM_REMOVABLE)) == PM_SPECIAL)
return 0;
/* remove parameter node from table */
paramtab->removenode(paramtab, pm->node.nam);
if (pm->old) {
oldpm = pm->old;
paramtab->addnode(paramtab, oldpm->node.nam, oldpm);
if ((PM_TYPE(oldpm->node.flags) == PM_SCALAR) &&
!(pm->node.flags & PM_HASHELEM) &&
(oldpm->node.flags & PM_NAMEDDIR) &&
oldpm->gsu.s == &stdscalar_gsu)
adduserdir(oldpm->node.nam, oldpm->u.str, 0, 0);
if (oldpm->node.flags & PM_EXPORTED) {
/*
* Re-export the old value which we removed in typeset_single().
* I don't think we need to test for ALL_EXPORT here, since if
* it was used to export the parameter originally the parameter
* should still have the PM_EXPORTED flag.
*/
export_param(oldpm);
}
}
paramtab->freenode(&pm->node); /* free parameter node */
return 0;
}
/* Standard function to unset a parameter. This is mostly delegated to *
* the specific set function.
*
* This could usefully be made type-specific, but then we need
* to be more careful when calling the unset method directly.
*
* The "exp"licit parameter should be nonzero for assignments and the
* unset command, and zero for implicit unset (e.g., end of scope).
* Currently this is used only by some modules.
*/
/**/
mod_export void
stdunsetfn(Param pm, UNUSED(int exp))
{
switch (PM_TYPE(pm->node.flags)) {
case PM_SCALAR:
if (pm->gsu.s->setfn)
pm->gsu.s->setfn(pm, NULL);
break;
case PM_ARRAY:
if (pm->gsu.a->setfn)
pm->gsu.a->setfn(pm, NULL);
break;
case PM_HASHED:
if (pm->gsu.h->setfn)
pm->gsu.h->setfn(pm, NULL);
break;
default:
if (!(pm->node.flags & PM_SPECIAL))
pm->u.str = NULL;
break;
}
if ((pm->node.flags & (PM_SPECIAL|PM_TIED)) == PM_TIED) {
if (pm->ename) {
zsfree(pm->ename);
pm->ename = NULL;
}
pm->node.flags &= ~PM_TIED;
}
pm->node.flags |= PM_UNSET;
}
/* Function to get value of an integer parameter */
/**/
mod_export zlong
intgetfn(Param pm)
{
return pm->u.val;
}
/* Function to set value of an integer parameter */
/**/
static void
intsetfn(Param pm, zlong x)
{
pm->u.val = x;
}
/* Function to get value of a floating point parameter */
/**/
static double
floatgetfn(Param pm)
{
return pm->u.dval;
}
/* Function to set value of an integer parameter */
/**/
static void
floatsetfn(Param pm, double x)
{
pm->u.dval = x;
}
/* Function to get value of a scalar (string) parameter */
/**/
mod_export char *
strgetfn(Param pm)
{
return pm->u.str ? pm->u.str : (char *) hcalloc(1);
}
/* Function to set value of a scalar (string) parameter */
/**/
mod_export void
strsetfn(Param pm, char *x)
{
zsfree(pm->u.str);
pm->u.str = x;
if (!(pm->node.flags & PM_HASHELEM) &&
((pm->node.flags & PM_NAMEDDIR) || isset(AUTONAMEDIRS))) {
pm->node.flags |= PM_NAMEDDIR;
adduserdir(pm->node.nam, x, 0, 0);
}
/* If you update this function, you may need to update the
* `Implement remainder of strsetfn' block in assignstrvalue(). */
}
/* Function to get value of an array parameter */
static char *nullarray = NULL;
/**/
char **
arrgetfn(Param pm)
{
return pm->u.arr ? pm->u.arr : &nullarray;
}
/* Function to set value of an array parameter */
/**/
mod_export void
arrsetfn(Param pm, char **x)
{
if (pm->u.arr && pm->u.arr != x)
freearray(pm->u.arr);
if (pm->node.flags & PM_UNIQUE)
uniqarray(x);
pm->u.arr = x;
/* Arrays tied to colon-arrays may need to fix the environment */
if (pm->ename && x)
arrfixenv(pm->ename, x);
/* If you extend this function, update the list of conditions in
* setarrvalue(). */
}
/* Function to get value of an association parameter */
/**/
mod_export HashTable
hashgetfn(Param pm)
{
return pm->u.hash;
}
/* Function to set value of an association parameter */
/**/
mod_export void
hashsetfn(Param pm, HashTable x)
{
if (pm->u.hash && pm->u.hash != x)
deleteparamtable(pm->u.hash);
pm->u.hash = x;
}
/* Function to dispose of setting of an unsettable hash */
/**/
mod_export void
nullsethashfn(UNUSED(Param pm), HashTable x)
{
deleteparamtable(x);
}
/* Function to set value of an association parameter using key/value pairs */
/**/
static void
arrhashsetfn(Param pm, char **val, int flags)
{
/* Best not to shortcut this by using the existing hash table, *
* since that could cause trouble for special hashes. This way, *
* it's up to pm->gsu.h->setfn() what to do. */
int alen = 0;
HashTable opmtab = paramtab, ht = 0;
char **aptr;
Value v = (Value) hcalloc(sizeof *v);
v->end = -1;
for (aptr = val; *aptr; ++aptr) {
if (**aptr != Marker)
++alen;
}
if (alen % 2) {
freearray(val);
zerr("bad set of key/value pairs for associative array");
return;
}
if (flags & ASSPM_AUGMENT) {
ht = paramtab = pm->gsu.h->getfn(pm);
}
if (alen && (!(flags & ASSPM_AUGMENT) || !paramtab)) {
ht = paramtab = newparamtable(17, pm->node.nam);
}
for (aptr = val; *aptr; ) {
int eltflags = 0;
if (**aptr == Marker) {
/* Either all elements have Marker or none. Checked in caller. */
if ((*aptr)[1] == '+') {
/* Actually, assignstrvalue currently doesn't handle this... */
eltflags = ASSPM_AUGMENT;
/* ...so we'll use the trick from setsparam(). */
v->start = INT_MAX;
} else {
v->start = 0;
}
v->end = -1;
zsfree(*aptr++);
}
/* The parameter name is ztrdup'd... */
v->pm = createparam(*aptr, PM_SCALAR|PM_UNSET);
/*
* createparam() doesn't return anything if the parameter
* already existed.
*/
if (!v->pm)
v->pm = (Param) paramtab->getnode(paramtab, *aptr);
zsfree(*aptr++);
/* ...but we can use the value without copying. */
assignstrvalue(v, *aptr++, eltflags);
}
paramtab = opmtab;
pm->gsu.h->setfn(pm, ht);
free(val); /* not freearray() */
}
/*
* These functions are used as the set function for special parameters that
* cannot be set by the user. The set is incomplete as the only such
* parameters are scalar and integer.
*/
/**/
mod_export void
nullstrsetfn(UNUSED(Param pm), char *x)
{
zsfree(x);
}
/**/
mod_export void
nullintsetfn(UNUSED(Param pm), UNUSED(zlong x))
{}
/**/
mod_export void
nullunsetfn(UNUSED(Param pm), UNUSED(int exp))
{}
/* Function to get value of generic special integer *
* parameter. data is pointer to global variable *
* containing the integer value. */
/**/
mod_export zlong
intvargetfn(Param pm)
{
return *pm->u.valptr;
}
/* Function to set value of generic special integer *
* parameter. data is pointer to global variable *
* where the value is to be stored. */
/**/
mod_export void
intvarsetfn(Param pm, zlong x)
{
*pm->u.valptr = x;
}
/* Function to set value of any ZLE-related integer *
* parameter. data is pointer to global variable *
* where the value is to be stored. */
/**/
void
zlevarsetfn(Param pm, zlong x)
{
zlong *p = pm->u.valptr;
*p = x;
if (p == &zterm_lines || p == &zterm_columns)
adjustwinsize(2 + (p == &zterm_columns));
}
/* Implements gsu_integer.unsetfn for ZLE_RPROMPT_INDENT; see stdunsetfn() */
static void
rprompt_indent_unsetfn(Param pm, int exp)
{
stdunsetfn(pm, exp);
rprompt_indent = 1; /* Keep this in sync with init_term() */
}
/* Function to set value of generic special scalar *
* parameter. data is pointer to a character pointer *
* representing the scalar (string). */
/**/
mod_export void
strvarsetfn(Param pm, char *x)
{
char **q = ((char **)pm->u.data);
zsfree(*q);
*q = x;
}
/* Function to get value of generic special scalar *
* parameter. data is pointer to a character pointer *
* representing the scalar (string). */
/**/
mod_export char *
strvargetfn(Param pm)
{
char *s = *((char **)pm->u.data);
if (!s)
return hcalloc(1);
return s;
}
/* Function to get value of generic special array *
* parameter. data is a pointer to the pointer to *
* a pointer (a pointer to a variable length array *
* of pointers). */
/**/
mod_export char **
arrvargetfn(Param pm)
{
char **arrptr = *((char ***)pm->u.data);
return arrptr ? arrptr : &nullarray;
}
/* Function to set value of generic special array parameter. *
* data is pointer to a variable length array of pointers which *
* represents this array of scalars (strings). If pm->ename is *
* non NULL, then it is a colon separated environment variable *
* version of this array which will need to be updated. */
/**/
mod_export void
arrvarsetfn(Param pm, char **x)
{
char ***dptr = (char ***)pm->u.data;
if (*dptr != x)
freearray(*dptr);
if (pm->node.flags & PM_UNIQUE)
uniqarray(x);
/*
* Special tied arrays point to variables accessible in other
* ways which need to be set to NULL. We can't do this
* with user tied variables since we can leak memory.
*/
if ((pm->node.flags & PM_SPECIAL) && !x)
*dptr = mkarray(NULL);
else
*dptr = x;
if (pm->ename) {
if (x)
arrfixenv(pm->ename, x);
else if (*dptr == path)
pathchecked = path;
}
}
/**/
mod_export char *
colonarrgetfn(Param pm)
{
char ***dptr = (char ***)pm->u.data;
return *dptr ? zjoin(*dptr, ':', 1) : "";
}
/**/
mod_export void
colonarrsetfn(Param pm, char *x)
{
char ***dptr = (char ***)pm->u.data;
/*
* We have to make sure this is never NULL, since that
* can cause problems.
*/
if (*dptr)
freearray(*dptr);
if (x)
*dptr = colonsplit(x, pm->node.flags & PM_UNIQUE);
else
*dptr = mkarray(NULL);
arrfixenv(pm->node.nam, *dptr);
zsfree(x);
}
/**/
char *
tiedarrgetfn(Param pm)
{
struct tieddata *dptr = (struct tieddata *)pm->u.data;
return *dptr->arrptr ?
zjoin(*dptr->arrptr, (unsigned char) dptr->joinchar, 1) : "";
}
/**/
void
tiedarrsetfn(Param pm, char *x)
{
struct tieddata *dptr = (struct tieddata *)pm->u.data;
if (*dptr->arrptr)
freearray(*dptr->arrptr);
else if (pm->ename) {
Param altpm = (Param) paramtab->getnode(paramtab, pm->ename);
if (altpm)
altpm->node.flags &= ~PM_DEFAULTED;
}
if (x) {
char sepbuf[3];
if (imeta(dptr->joinchar))
{
sepbuf[0] = Meta;
sepbuf[1] = dptr->joinchar ^ 32;
sepbuf[2] = '\0';
}
else
{
sepbuf[0] = dptr->joinchar;
sepbuf[1] = '\0';
}
*dptr->arrptr = sepsplit(x, sepbuf, 0, 0);
if (pm->node.flags & PM_UNIQUE)
uniqarray(*dptr->arrptr);
zsfree(x);
} else
*dptr->arrptr = NULL;
if (pm->ename)
arrfixenv(pm->node.nam, *dptr->arrptr);
}
/**/
void
tiedarrunsetfn(Param pm, UNUSED(int exp))
{
/*
* Special unset function because we allocated a struct tieddata
* in typeset_single to hold the special data which we now
* need to delete.
*/
pm->gsu.s->setfn(pm, NULL);
zfree(pm->u.data, sizeof(struct tieddata));
/* paranoia -- shouldn't need these, but in case we reuse the struct... */
pm->u.data = NULL;
zsfree(pm->ename);
pm->ename = NULL;
pm->node.flags &= ~PM_TIED;
pm->node.flags |= PM_UNSET;
}
/**/
static void
simple_arrayuniq(char **x, int freeok)
{
char **t, **p = x;
char *hole = "";
/* Find duplicates and replace them with holes */
while (*++p)
for (t = x; t < p; t++)
if (*t != hole && !strcmp(*p, *t)) {
if (freeok)
zsfree(*p);
*p = hole;
break;
}
/* Swap non-holes into holes in optimal jumps */
for (p = t = x; *t != NULL; t++) {
if (*t == hole) {
while (*p == hole)
++p;
if ((*t = *p) != NULL)
*p++ = hole;
} else if (p == t)
p++;
}
/* Erase all the remaining holes, just in case */
while (++t < p)
*t = NULL;
}
/**/
static void
arrayuniq_freenode(HashNode hn)
{
(void)hn;
}
/**/
HashTable
newuniqtable(zlong size)
{
HashTable ht = newhashtable((int)size, "arrayuniq", NULL);
/* ??? error checking */
ht->hash = hasher;
ht->emptytable = emptyhashtable;
ht->filltable = NULL;
ht->cmpnodes = strcmp;
ht->addnode = addhashnode;
ht->getnode = gethashnode2;
ht->getnode2 = gethashnode2;
ht->removenode = removehashnode;
ht->disablenode = disablehashnode;
ht->enablenode = enablehashnode;
ht->freenode = arrayuniq_freenode;
ht->printnode = NULL;
return ht;
}
/**/
static void
arrayuniq(char **x, int freeok)
{
char **it, **write_it;
zlong array_size = arrlen(x);
HashTable ht;
if (array_size == 0)
return;
if (array_size < 10 || !(ht = newuniqtable(array_size + 1))) {
/* fallback to simpler routine */
simple_arrayuniq(x, freeok);
return;
}
for (it = x, write_it = x; *it;) {
if (! gethashnode2(ht, *it)) {
HashNode new_node = zhalloc(sizeof(struct hashnode));
if (!new_node) {
/* Oops, out of heap memory, no way to recover */
zerr("out of memory in arrayuniq");
break;
}
(void) addhashnode2(ht, *it, new_node);
*write_it = *it;
if (it != write_it)
*it = NULL;
++write_it;
}
else {
if (freeok)
zsfree(*it);
*it = NULL;
}
++it;
}
deletehashtable(ht);
}
/**/
void
uniqarray(char **x)
{
if (!x || !*x)
return;
arrayuniq(x, !zheapptr(*x));
}
/**/
void
zhuniqarray(char **x)
{
if (!x || !*x)
return;
arrayuniq(x, 0);
}
/* Function to get value of special parameter `#' and `ARGC' */
/**/
zlong
poundgetfn(UNUSED(Param pm))
{
return arrlen(pparams);
}
/* Function to get value for special parameter `RANDOM' */
/**/
zlong
randomgetfn(UNUSED(Param pm))
{
return rand() & 0x7fff;
}
/* Function to set value of special parameter `RANDOM' */
/**/
void
randomsetfn(UNUSED(Param pm), zlong v)
{
srand((unsigned int)v);
}
/* Function to get value for special parameter `SECONDS' */
/**/
zlong
intsecondsgetfn(UNUSED(Param pm))
{
struct timeval now;
struct timezone dummy_tz;
gettimeofday(&now, &dummy_tz);
return (zlong)(now.tv_sec - shtimer.tv_sec -
(now.tv_usec < shtimer.tv_usec ? 1 : 0));
}
/* Function to set value of special parameter `SECONDS' */
/**/
void
intsecondssetfn(UNUSED(Param pm), zlong x)
{
struct timeval now;
struct timezone dummy_tz;
zlong diff;
gettimeofday(&now, &dummy_tz);
diff = (zlong)now.tv_sec - x;
shtimer.tv_sec = diff;
if ((zlong)shtimer.tv_sec != diff)
zwarn("SECONDS truncated on assignment");
shtimer.tv_usec = now.tv_usec;
}
/**/
double
floatsecondsgetfn(UNUSED(Param pm))
{
struct timeval now;
struct timezone dummy_tz;
gettimeofday(&now, &dummy_tz);
return (double)(now.tv_sec - shtimer.tv_sec) +
(double)(now.tv_usec - shtimer.tv_usec) / 1000000.0;
}
/**/
void
floatsecondssetfn(UNUSED(Param pm), double x)
{
struct timeval now;
struct timezone dummy_tz;
gettimeofday(&now, &dummy_tz);
shtimer.tv_sec = now.tv_sec - (zlong)x;
shtimer.tv_usec = now.tv_usec - (zlong)((x - (zlong)x) * 1000000.0);
}
/**/
double
getrawseconds(void)
{
return (double)shtimer.tv_sec + (double)shtimer.tv_usec / 1000000.0;
}
/**/
void
setrawseconds(double x)
{
shtimer.tv_sec = (zlong)x;
shtimer.tv_usec = (zlong)((x - (zlong)x) * 1000000.0);
}
/**/
int
setsecondstype(Param pm, int on, int off)
{
int newflags = (pm->node.flags | on) & ~off;
int tp = PM_TYPE(newflags);
/* Only one of the numeric types is allowed. */
if (tp == PM_EFLOAT || tp == PM_FFLOAT)
{
pm->gsu.f = &floatseconds_gsu;
}
else if (tp == PM_INTEGER)
{
pm->gsu.i = &intseconds_gsu;
}
else
return 1;
pm->node.flags = newflags;
return 0;
}
/* Function to get value for special parameter `USERNAME' */
/**/
char *
usernamegetfn(UNUSED(Param pm))
{
return get_username();
}
/* Function to set value of special parameter `USERNAME' */
/**/
void
usernamesetfn(UNUSED(Param pm), char *x)
{
#if defined(HAVE_SETUID) && defined(USE_GETPWNAM)
struct passwd *pswd;
if (x && (pswd = getpwnam(x)) && (pswd->pw_uid != cached_uid)) {
# ifdef USE_INITGROUPS
initgroups(x, pswd->pw_gid);
# endif
if (setgid(pswd->pw_gid))
zwarn("failed to change group ID: %e", errno);
else if (setuid(pswd->pw_uid))
zwarn("failed to change user ID: %e", errno);
else {
zsfree(cached_username);
cached_username = ztrdup_metafy(pswd->pw_name);
cached_uid = pswd->pw_uid;
}
}
#endif /* HAVE_SETUID && USE_GETPWNAM */
zsfree(x);
}
/* Function to get value for special parameter `UID' */
/**/
zlong
uidgetfn(UNUSED(Param pm))
{
return getuid();
}
/* Function to set value of special parameter `UID' */
/**/
void
uidsetfn(UNUSED(Param pm), zlong x)
{
#ifdef HAVE_SETUID
if (setuid((uid_t)x))
zerr("failed to change user ID: %e", errno);
#endif
}
/* Function to get value for special parameter `EUID' */
/**/
zlong
euidgetfn(UNUSED(Param pm))
{
return geteuid();
}
/* Function to set value of special parameter `EUID' */
/**/
void
euidsetfn(UNUSED(Param pm), zlong x)
{
#ifdef HAVE_SETEUID
if (seteuid((uid_t)x))
zerr("failed to change effective user ID: %e", errno);
#endif
}
/* Function to get value for special parameter `GID' */
/**/
zlong
gidgetfn(UNUSED(Param pm))
{
return getgid();
}
/* Function to set value of special parameter `GID' */
/**/
void
gidsetfn(UNUSED(Param pm), zlong x)
{
#ifdef HAVE_SETUID
if (setgid((gid_t)x))
zerr("failed to change group ID: %e", errno);
#endif
}
/* Function to get value for special parameter `EGID' */
/**/
zlong
egidgetfn(UNUSED(Param pm))
{
return getegid();
}
/* Function to set value of special parameter `EGID' */
/**/
void
egidsetfn(UNUSED(Param pm), zlong x)
{
#ifdef HAVE_SETEUID
if (setegid((gid_t)x))
zerr("failed to change effective group ID: %e", errno);
#endif
}
/**/
zlong
ttyidlegetfn(UNUSED(Param pm))
{
struct stat ttystat;
if (SHTTY == -1 || fstat(SHTTY, &ttystat))
return -1;
return time(NULL) - ttystat.st_atime;
}
/* Function to get value for special parameter `IFS' */
/**/
char *
ifsgetfn(UNUSED(Param pm))
{
return ifs;
}
/* Function to set value of special parameter `IFS' */
/**/
void
ifssetfn(UNUSED(Param pm), char *x)
{
zsfree(ifs);
ifs = x;
inittyptab();
}
/* Functions to set value of special parameters `LANG' and `LC_*' */
#ifdef USE_LOCALE
static struct localename {
char *name;
int category;
} lc_names[] = {
#ifdef LC_COLLATE
{"LC_COLLATE", LC_COLLATE},
#endif
#ifdef LC_CTYPE
{"LC_CTYPE", LC_CTYPE},
#endif
#ifdef LC_MESSAGES
{"LC_MESSAGES", LC_MESSAGES},
#endif
#ifdef LC_NUMERIC
{"LC_NUMERIC", LC_NUMERIC},
#endif
#ifdef LC_TIME
{"LC_TIME", LC_TIME},
#endif
{NULL, 0}
};
/* On some systems (at least on NetBSD-9), when LC_CTYPE changes,
* global variables (type mbstate_t) used by mbrtowc() etc. need be
* reset by clear_mbstate() */
/**/
static void
clear_mbstate(void) {
#ifdef MULTIBYTE_SUPPORT
mb_charinit(); /* utils.c */
clear_shiftstate(); /* pattern.c */
#endif
}
/**/
static void
setlang(char *x)
{
struct localename *ln;
char *x2;
if ((x2 = getsparam_u("LC_ALL")) && *x2)
return;
/*
* Set the global locale to the value passed, but override
* this with any non-empty definitions for specific
* categories.
*
* We only use non-empty definitions because empty values aren't
* valid as locales; when passed to setlocale() they mean "use the
* environment variable", but if that's what we're setting the value
* from this is meaningless. So just all $LANG to show through in
* that case.
*/
setlocale(LC_ALL, x ? unmeta(x) : "");
clear_mbstate();
queue_signals();
for (ln = lc_names; ln->name; ln++)
if ((x = getsparam_u(ln->name)) && *x)
setlocale(ln->category, x);
unqueue_signals();
inittyptab();
}
/**/
void
lc_allsetfn(Param pm, char *x)
{
strsetfn(pm, x);
/*
* Treat an empty LC_ALL the same as an unset one,
* namely by using LANG as the default locale but overriding
* that with any LC_* that are set.
*/
if (!x || !*x) {
x = getsparam_u("LANG");
if (x && *x) {
queue_signals();
setlang(x);
unqueue_signals();
}
}
else {
setlocale(LC_ALL, unmeta(x));
clear_mbstate();
inittyptab();
}
}
/**/
void
langsetfn(Param pm, char *x)
{
strsetfn(pm, x);
setlang(unmeta(x));
}
/**/
void
lcsetfn(Param pm, char *x)
{
char *x2;
struct localename *ln;
strsetfn(pm, x);
if ((x2 = getsparam("LC_ALL")) && *x2)
return;
queue_signals();
/* Treat empty LC_* the same as unset. */
if (!x || !*x)
x = getsparam("LANG");
/*
* If we've got no non-empty string at this
* point (after checking $LANG, too),
* we shouldn't bother setting anything.
*/
if (x && *x) {
for (ln = lc_names; ln->name; ln++)
if (!strcmp(ln->name, pm->node.nam))
setlocale(ln->category, unmeta(x));
}
unqueue_signals();
clear_mbstate(); /* LC_CTYPE may have changed */
inittyptab();
}
#endif /* USE_LOCALE */
/* Function to set value for special parameter `0' */
/**/
static void
argzerosetfn(UNUSED(Param pm), char *x)
{
if (x) {
if (isset(POSIXARGZERO))
zerr("read-only variable: 0");
else {
zsfree(argzero);
argzero = ztrdup(x);
}
zsfree(x);
}
}
/* Function to get value for special parameter `0' */
/**/
static char *
argzerogetfn(UNUSED(Param pm))
{
if (isset(POSIXARGZERO))
return posixzero;
return argzero;
}
/* Function to get value for special parameter `HISTSIZE' */
/**/
zlong
histsizegetfn(UNUSED(Param pm))
{
return histsiz;
}
/* Function to set value of special parameter `HISTSIZE' */
/**/
void
histsizesetfn(UNUSED(Param pm), zlong v)
{
if ((histsiz = v) < 1)
histsiz = 1;
resizehistents();
}
/* Function to get value for special parameter `SAVEHIST' */
/**/
zlong
savehistsizegetfn(UNUSED(Param pm))
{
return savehistsiz;
}
/* Function to set value of special parameter `SAVEHIST' */
/**/
void
savehistsizesetfn(UNUSED(Param pm), zlong v)
{
if ((savehistsiz = v) < 0)
savehistsiz = 0;
}
/* Function to set value for special parameter `ERRNO' */
/**/
void
errnosetfn(UNUSED(Param pm), zlong x)
{
errno = (int)x;
if ((zlong)errno != x)
zwarn("errno truncated on assignment");
}
/* Function to get value for special parameter `ERRNO' */
/**/
zlong
errnogetfn(UNUSED(Param pm))
{
return errno;
}
/* Function to get value for special parameter `KEYBOARD_HACK' */
/**/
char *
keyboardhackgetfn(UNUSED(Param pm))
{
static char buf[2];
buf[0] = keyboardhackchar;
buf[1] = '\0';
return buf;
}
/* Function to set value of special parameter `KEYBOARD_HACK' */
/**/
void
keyboardhacksetfn(UNUSED(Param pm), char *x)
{
if (x) {
int len, i;
unmetafy(x, &len);
if (len > 1) {
len = 1;
zwarn("Only one KEYBOARD_HACK character can be defined"); /* could be changed if needed */
}
for (i = 0; i < len; i++) {
if (!isascii((unsigned char) x[i])) {
zwarn("KEYBOARD_HACK can only contain ASCII characters");
return;
}
}
keyboardhackchar = len ? (unsigned char) x[0] : '\0';
free(x);
} else
keyboardhackchar = '\0';
}
/* Function to get value for special parameter `histchar' */
/**/
char *
histcharsgetfn(UNUSED(Param pm))
{
static char buf[4];
buf[0] = bangchar;
buf[1] = hatchar;
buf[2] = hashchar;
buf[3] = '\0';
return buf;
}
/* Function to set value of special parameter `histchar' */
/**/
void
histcharssetfn(UNUSED(Param pm), char *x)
{
if (x) {
int len, i;
unmetafy(x, &len);
if (len > 3)
len = 3;
for (i = 0; i < len; i++) {
if (!isascii((unsigned char) x[i])) {
zwarn("HISTCHARS can only contain ASCII characters");
return;
}
}
bangchar = len ? (unsigned char) x[0] : '\0';
hatchar = len > 1 ? (unsigned char) x[1] : '\0';
hashchar = len > 2 ? (unsigned char) x[2] : '\0';
free(x);
} else {
bangchar = '!';
hashchar = '#';
hatchar = '^';
}
inittyptab();
}
/* Function to get value for special parameter `HOME' */
/**/
char *
homegetfn(UNUSED(Param pm))
{
return home;
}
/* Function to set value of special parameter `HOME' */
/**/
void
homesetfn(UNUSED(Param pm), char *x)
{
zsfree(home);
if (x && isset(CHASELINKS) && (home = xsymlink(x, 0)))
zsfree(x);
else
home = x ? x : ztrdup("");
finddir(NULL);
}
/* Function to get value for special parameter `WORDCHARS' */
/**/
char *
wordcharsgetfn(UNUSED(Param pm))
{
return wordchars;
}
/* Function to set value of special parameter `WORDCHARS' */
/**/
void
wordcharssetfn(UNUSED(Param pm), char *x)
{
zsfree(wordchars);
wordchars = x;
inittyptab();
}
/* Function to get value for special parameter `_' */
/**/
char *
underscoregetfn(UNUSED(Param pm))
{
char *u = dupstring(zunderscore);
untokenize(u);
return u;
}
/* Function used when we need to reinitialise the terminal */
static void
term_reinit_from_pm(void)
{
/* If non-interactive, delay setting up term till we need it. */
if (unset(INTERACTIVE) || !*term)
termflags |= TERM_UNKNOWN;
else
init_term();
}
/* Function to get value for special parameter `TERM' */
/**/
char *
termgetfn(UNUSED(Param pm))
{
return term;
}
/* Function to set value of special parameter `TERM' */
/**/
void
termsetfn(UNUSED(Param pm), char *x)
{
zsfree(term);
term = x ? x : ztrdup("");
term_reinit_from_pm();
}
/* Function to get value of special parameter `TERMINFO' */
/**/
char *
terminfogetfn(UNUSED(Param pm))
{
return zsh_terminfo ? zsh_terminfo : dupstring("");
}
/* Function to set value of special parameter `TERMINFO' */
/**/
void
terminfosetfn(Param pm, char *x)
{
zsfree(zsh_terminfo);
zsh_terminfo = x;
/*
* terminfo relies on the value being exported before
* we reinitialise the terminal. This is a bit inefficient.
*/
if ((pm->node.flags & PM_EXPORTED) && x)
addenv(pm, x);
term_reinit_from_pm();
}
/* Function to get value of special parameter `TERMINFO_DIRS' */
/**/
char *
terminfodirsgetfn(UNUSED(Param pm))
{
return zsh_terminfodirs ? zsh_terminfodirs : dupstring("");
}
/* Function to set value of special parameter `TERMINFO_DIRS' */
/**/
void
terminfodirssetfn(Param pm, char *x)
{
zsfree(zsh_terminfodirs);
zsh_terminfodirs = x;
/*
* terminfo relies on the value being exported before
* we reinitialise the terminal. This is a bit inefficient.
*/
if ((pm->node.flags & PM_EXPORTED) && x)
addenv(pm, x);
term_reinit_from_pm();
}
/* Function to get value for special parameter `pipestatus' */
/**/
static char **
pipestatgetfn(UNUSED(Param pm))
{
char **x = (char **) zhalloc((numpipestats + 1) * sizeof(char *));
char buf[DIGBUFSIZE], **p;
int *q, i;
for (p = x, q = pipestats, i = numpipestats; i--; p++, q++) {
sprintf(buf, "%d", *q);
*p = dupstring(buf);
}
*p = NULL;
return x;
}
/* Function to get value for special parameter `pipestatus' */
/**/
static void
pipestatsetfn(UNUSED(Param pm), char **x)
{
if (x) {
int i;
for (i = 0; *x && i < MAX_PIPESTATS; i++, x++)
pipestats[i] = atoi(*x);
numpipestats = i;
}
else
numpipestats = 0;
}
/**/
void
arrfixenv(char *s, char **t)
{
Param pm;
int joinchar;
if (t == path)
cmdnamtab->emptytable(cmdnamtab);
pm = (Param) paramtab->getnode(paramtab, s);
/*
* Only one level of a parameter can be exported. Unless
* ALLEXPORT is set, this must be global.
*/
if (pm->node.flags & PM_HASHELEM)
return;
if (isset(ALLEXPORT))
pm->node.flags |= PM_EXPORTED;
pm->node.flags &= ~PM_DEFAULTED;
/*
* Do not "fix" parameters that were not exported
*/
if (!(pm->node.flags & PM_EXPORTED))
return;
if (pm->node.flags & PM_SPECIAL)
joinchar = ':';
else
joinchar = (unsigned char) ((struct tieddata *)pm->u.data)->joinchar;
addenv(pm, t ? zjoin(t, joinchar, 1) : "");
}
/**/
int
zputenv(char *str)
{
DPUTS(!str, "Attempt to put null string into environment.");
#ifdef USE_SET_UNSET_ENV
/*
* If we are using unsetenv() to remove values from the
* environment, which is the safe thing to do, we
* need to use setenv() to put them there in the first place.
* Unfortunately this is a slightly different interface
* from what zputenv() assumes.
*/
char *ptr;
int ret;
for (ptr = str; *ptr && (unsigned char) *ptr < 128 && *ptr != '='; ptr++)
;
if ((unsigned char) *ptr >= 128) {
/*
* Environment variables not in the portable character
* set are non-standard and we don't really know of
* a use for them.
*
* We'll disable until someone complains.
*/
return 1;
} else if (*ptr) {
*ptr = '\0';
ret = setenv(str, ptr+1, 1);
*ptr = '=';
} else {
/* safety first */
DPUTS(1, "bad environment string");
ret = setenv(str, ptr, 1);
}
return ret;
#else
#ifdef HAVE_PUTENV
return putenv(str);
#else
char **ep;
int num_env;
/* First check if there is already an environment *
* variable matching string `name'. */
if (findenv(str, &num_env)) {
environ[num_env] = str;
} else {
/* Else we have to make room and add it */
num_env = arrlen(environ);
environ = (char **) zrealloc(environ, (sizeof(char *)) * (num_env + 2));
/* Now add it at the end */
ep = environ + num_env;
*ep = str;
*(ep + 1) = NULL;
}
return 0;
#endif
#endif
}
/**/
#ifndef USE_SET_UNSET_ENV
/**/
static int
findenv(char *name, int *pos)
{
char **ep, *eq;
int nlen;
eq = strchr(name, '=');
nlen = eq ? eq - name : (int)strlen(name);
for (ep = environ; *ep; ep++)
if (!strncmp (*ep, name, nlen) && *((*ep)+nlen) == '=') {
if (pos)
*pos = ep - environ;
return 1;
}
return 0;
}
/**/
#endif
/* Given *name = "foo", it searches the environment for string *
* "foo=bar", and returns a pointer to the beginning of "bar" */
/**/
mod_export char *
zgetenv(char *name)
{
#ifdef HAVE_GETENV
return getenv(name);
#else
char **ep, *s, *t;
for (ep = environ; *ep; ep++) {
for (s = *ep, t = name; *s && *s == *t; s++, t++);
if (*s == '=' && !*t)
return s + 1;
}
return NULL;
#endif
}
/**/
static void
copyenvstr(char *s, char *value, int flags)
{
while (*s++) {
if ((*s = *value++) == Meta)
*s = *value++ ^ 32;
if (flags & PM_LOWER)
*s = tulower(*s);
else if (flags & PM_UPPER)
*s = tuupper(*s);
}
}
/**/
void
addenv(Param pm, char *value)
{
char *newenv = 0;
#ifndef USE_SET_UNSET_ENV
char *oldenv = 0, *env = 0;
int pos;
/*
* First check if there is already an environment
* variable matching string `name'.
*/
if (findenv(pm->node.nam, &pos))
oldenv = environ[pos];
#endif
newenv = mkenvstr(pm->node.nam, value, pm->node.flags);
if (zputenv(newenv)) {
zsfree(newenv);
pm->env = NULL;
return;
}
#ifdef USE_SET_UNSET_ENV
/*
* If we are using setenv/unsetenv to manage the environment,
* we simply store the string we created in pm->env since
* memory management of the environment is handled entirely
* by the system.
*
* TODO: is this good enough to fix problem cases from
* the other branch? If so, we don't actually need to
* store pm->env at all, just a flag that the value was set.
*/
if (pm->env)
zsfree(pm->env);
pm->env = newenv;
pm->node.flags |= PM_EXPORTED;
#else
/*
* Under Cygwin we must use putenv() to maintain consistency.
* Unfortunately, current version (1.1.2) copies argument and may
* silently reuse existing environment string. This tries to
* check for both cases
*/
if (findenv(pm->node.nam, &pos)) {
env = environ[pos];
if (env != oldenv)
zsfree(oldenv);
if (env != newenv)
zsfree(newenv);
pm->node.flags |= PM_EXPORTED;
pm->env = env;
return;
}
DPUTS(1, "addenv should never reach the end");
pm->env = NULL;
#endif
}
/* Given strings *name = "foo", *value = "bar", *
* return a new string *str = "foo=bar". */
/**/
static char *
mkenvstr(char *name, char *value, int flags)
{
char *str, *s = value;
int len_name, len_value = 0;
len_name = strlen(name);
if (s)
while (*s && (*s++ != Meta || *s++ != 32))
len_value++;
s = str = (char *) zalloc(len_name + len_value + 2);
strcpy(s, name);
s += len_name;
*s = '=';
if (value)
copyenvstr(s, value, flags);
else
*++s = '\0';
return str;
}
/* Given *name = "foo", *value = "bar", add the *
* string "foo=bar" to the environment. Return a *
* pointer to the location of this new environment *
* string. */
#ifndef USE_SET_UNSET_ENV
/**/
void
delenvvalue(char *x)
{
char **ep;
for (ep = environ; *ep; ep++) {
if (*ep == x)
break;
}
if (*ep) {
for (; (ep[0] = ep[1]); ep++);
}
zsfree(x);
}
#endif
/* Delete a pointer from the list of pointers to environment *
* variables by shifting all the other pointers up one slot. */
/**/
void
delenv(Param pm)
{
#ifdef USE_SET_UNSET_ENV
unsetenv(pm->node.nam);
zsfree(pm->env);
#else
delenvvalue(pm->env);
#endif
pm->env = NULL;
/*
* Note we don't remove PM_EXPORT from the flags. This
* may be asking for trouble but we need to know later
* if we restore this parameter to its old value.
*/
}
/*
* Guts of convbase: this version can return the number of digits
* sans any base discriminator.
*/
/**/
void
convbase_ptr(char *s, zlong v, int base, int *ndigits)
{
int digs = 0;
zulong x;
if (v < 0)
*s++ = '-', v = -v;
if (base >= -1 && base <= 1)
base = -10;
if (base > 0) {
if (isset(CBASES) && base == 16)
sprintf(s, "0x");
else if (isset(CBASES) && base == 8 && isset(OCTALZEROES))
sprintf(s, "0");
else if (base != 10)
sprintf(s, "%d#", base);
else
*s = 0;
s += strlen(s);
} else
base = -base;
for (x = v; x; digs++)
x /= base;
if (!digs)
digs = 1;
if (ndigits)
*ndigits = digs;
s[digs--] = '\0';
x = v;
while (digs >= 0) {
int dig = x % base;
s[digs--] = (dig < 10) ? '0' + dig : dig - 10 + 'A';
x /= base;
}
}
/*
* Basic conversion of integer to a string given a base.
* If 0 base is 10.
* If negative no base discriminator is output.
*/
/**/
mod_export void
convbase(char *s, zlong v, int base)
{
convbase_ptr(s, v, base, NULL);
}
/*
* Add underscores to converted integer for readability with given spacing.
* s is as for convbase: at least BDIGBUFSIZE.
* If underscores were added, returned value with underscores comes from
* heap, else the returned value is s.
*/
/**/
char *
convbase_underscore(char *s, zlong v, int base, int underscore)
{
char *retptr, *sptr, *dptr;
int ndigits, nunderscore, mod, len;
convbase_ptr(s, v, base, &ndigits);
if (underscore <= 0)
return s;
nunderscore = (ndigits - 1) / underscore;
if (!nunderscore)
return s;
len = strlen(s);
retptr = zhalloc(len + nunderscore + 1);
mod = 0;
memcpy(retptr, s, len - ndigits);
sptr = s + len;
dptr = retptr + len + nunderscore;
/* copy the null */
*dptr-- = *sptr--;
for (;;) {
*dptr = *sptr;
if (!--ndigits)
break;
dptr--;
sptr--;
if (++mod == underscore) {
mod = 0;
*dptr-- = '_';
}
}
return retptr;
}
/*
* Convert a floating point value for output.
* Unlike convbase(), this has its own internal storage and returns
* a value from the heap.
*/
/**/
char *
convfloat(double dval, int digits, int flags, FILE *fout)
{
char fmt[] = "%.*e";
char *prev_locale, *ret;
/*
* The difficulty with the buffer size is that a %f conversion
* prints all digits before the decimal point: with 64 bit doubles,
* that's around 310. We can't check without doing some quite
* serious floating point operations we'd like to avoid.
* Then we are liable to get all the digits
* we asked for after the decimal point, or we should at least
* bargain for it. So we just allocate 512 + digits. This
* should work until somebody decides on 128-bit doubles.
*/
if (!(flags & (PM_EFLOAT|PM_FFLOAT))) {
/*
* Conversion from a floating point expression without using
* a variable. The best bet in this case just seems to be
* to use the general %g format with something like the maximum
* double precision.
*/
fmt[3] = 'g';
if (!digits)
digits = 17;
} else {
if (flags & PM_FFLOAT)
fmt[3] = 'f';
if (digits <= 0)
digits = 10;
if (flags & PM_EFLOAT) {
/*
* Here, we are given the number of significant figures, but
* %e wants the number of decimal places (unlike %g)
*/
digits--;
}
}
#ifdef USE_LOCALE
prev_locale = dupstring(setlocale(LC_NUMERIC, NULL));
setlocale(LC_NUMERIC, "POSIX");
#endif
if (fout) {
fprintf(fout, fmt, digits, dval);
ret = NULL;
} else {
VARARR(char, buf, 512 + digits);
if (isinf(dval))
ret = dupstring((dval < 0.0) ? "-Inf" : "Inf");
else if (isnan(dval))
ret = dupstring("NaN");
else {
sprintf(buf, fmt, digits, dval);
if (!strchr(buf, 'e') && !strchr(buf, '.'))
strcat(buf, ".");
ret = dupstring(buf);
}
}
#ifdef USE_LOCALE
if (prev_locale) setlocale(LC_NUMERIC, prev_locale);
#endif
return ret;
}
/*
* convert float to string with basic options but inserting underscores
* for readability.
*/
/**/
char *convfloat_underscore(double dval, int underscore)
{
int ndigits_int = 0, ndigits_frac = 0, nunderscore, len;
char *s, *retptr, *sptr, *dptr;
s = convfloat(dval, 0, 0, NULL);
if (underscore <= 0)
return s;
/*
* Count the number of digits before and after the decimal point, if any.
*/
sptr = s;
if (*sptr == '-')
sptr++;
while (idigit(*sptr)) {
ndigits_int++;
sptr++;
}
if (*sptr == '.') {
sptr++;
while (idigit(*sptr)) {
ndigits_frac++;
sptr++;
}
}
/*
* Work out how many underscores to insert --- remember we
* put them in integer and fractional parts separately.
*/
nunderscore = (ndigits_int-1) / underscore + (ndigits_frac-1) / underscore;
if (!nunderscore)
return s;
len = strlen(s);
dptr = retptr = zhalloc(len + nunderscore + 1);
/*
* Insert underscores in integer part.
* Grouping starts from the point in both directions.
*/
sptr = s;
if (*sptr == '-')
*dptr++ = *sptr++;
while (ndigits_int) {
*dptr++ = *sptr++;
if (--ndigits_int && !(ndigits_int % underscore))
*dptr++ = '_';
}
if (ndigits_frac) {
/*
* Insert underscores in the fractional part.
*/
int mod = 0;
/* decimal point, we already checked */
*dptr++ = *sptr++;
while (ndigits_frac) {
*dptr++ = *sptr++;
mod++;
if (--ndigits_frac && mod == underscore) {
*dptr++ = '_';
mod = 0;
}
}
}
/* Copy exponent and anything else up to null */
while ((*dptr++ = *sptr++))
;
return retptr;
}
/* Start a parameter scope */
/**/
mod_export void
startparamscope(void)
{
locallevel++;
}
#ifdef USE_LOCALE
/*
* Flag that one of the special LC_ functions or LANG changed on scope
* end
*/
static int lc_update_needed;
#endif /* USE_LOCALE */
/* End a parameter scope: delete the parameters local to the scope. */
/**/
mod_export void
endparamscope(void)
{
queue_signals();
locallevel--;
/* This pops anything from a higher locallevel */
saveandpophiststack(0, HFILE_USE_OPTIONS);
#ifdef USE_LOCALE
lc_update_needed = 0;
#endif
scanhashtable(paramtab, 0, 0, 0, scanendscope, 0);
#ifdef USE_LOCALE
if (lc_update_needed)
{
/* Locale changed --- ensure it is restored. */
char *val;
if ((val = getsparam_u("LC_ALL")) && *val) {
setlocale(LC_ALL, val);
} else {
struct localename *ln;
if ((val = getsparam_u("LANG")) && *val)
setlang(val);
for (ln = lc_names; ln->name; ln++) {
if ((val = getsparam_u(ln->name)) && *val)
setlocale(ln->category, val);
}
}
clear_mbstate(); /* LC_CTYPE may have changed */
}
#endif /* USE_LOCALE */
unqueue_signals();
}
/**/
static void
scanendscope(HashNode hn, UNUSED(int flags))
{
Param pm = (Param)hn;
if (pm->level > locallevel) {
if ((pm->node.flags & (PM_SPECIAL|PM_REMOVABLE)) == PM_SPECIAL) {
/*
* Removable specials are normal in that they can be removed
* to reveal an ordinary parameter beneath. Here we handle
* non-removable specials, which were made local by stealth
* (see newspecial code in typeset_single()). In fact the
* visible pm is always the same struct; the pm->old is
* just a place holder for old data and flags.
*/
Param tpm = pm->old;
#ifdef USE_LOCALE
if (!strncmp(pm->node.nam, "LC_", 3) ||
!strcmp(pm->node.nam, "LANG"))
lc_update_needed = 1;
#endif
if (!strcmp(pm->node.nam, "SECONDS"))
{
setsecondstype(pm, PM_TYPE(tpm->node.flags), PM_TYPE(pm->node.flags));
/*
* We restore SECONDS by restoring its raw internal value
* that we cached off into tpm->u.dval.
*/
setrawseconds(tpm->u.dval);
tpm->node.flags |= PM_NORESTORE;
}
DPUTS(!tpm || PM_TYPE(pm->node.flags) != PM_TYPE(tpm->node.flags) ||
!(tpm->node.flags & PM_SPECIAL),
"BUG: in restoring scope of special parameter");
pm->old = tpm->old;
pm->node.flags = (tpm->node.flags & ~PM_NORESTORE);
pm->level = tpm->level;
pm->base = tpm->base;
pm->width = tpm->width;
if (pm->env)
delenv(pm);
if (!(tpm->node.flags & (PM_NORESTORE|PM_READONLY)))
switch (PM_TYPE(pm->node.flags)) {
case PM_SCALAR:
pm->gsu.s->setfn(pm, tpm->u.str);
break;
case PM_INTEGER:
pm->gsu.i->setfn(pm, tpm->u.val);
break;
case PM_EFLOAT:
case PM_FFLOAT:
pm->gsu.f->setfn(pm, tpm->u.dval);
break;
case PM_ARRAY:
pm->gsu.a->setfn(pm, tpm->u.arr);
break;
case PM_HASHED:
pm->gsu.h->setfn(pm, tpm->u.hash);
break;
}
zfree(tpm, sizeof(*tpm));
if (pm->node.flags & PM_EXPORTED)
export_param(pm);
} else
unsetparam_pm(pm, 0, 0);
} else if ((pm->node.flags & PM_NAMEREF) && pm->base > pm->level)
pm->base = locallevel;
}
/**********************************/
/* Parameter Hash Table Functions */
/**********************************/
/**/
void
freeparamnode(HashNode hn)
{
Param pm = (Param) hn;
/* The second argument of unsetfn() is used by modules to
* differentiate "exp"licit unset from implicit unset, as when
* a parameter is going out of scope. It's not clear which
* of these applies here, but passing 1 has always worked.
*/
if (delunset)
pm->gsu.s->unsetfn(pm, 1);
zsfree(pm->node.nam);
/* If this variable was tied by the user, ename was ztrdup'd */
if (!(pm->node.flags & PM_SPECIAL))
zsfree(pm->ename);
zfree(pm, sizeof(struct param));
}
/* Print a parameter */
enum paramtypes_flags {
PMTF_USE_BASE = (1<<0),
PMTF_USE_WIDTH = (1<<1),
PMTF_TEST_LEVEL = (1<<2)
};
struct paramtypes {
int binflag; /* The relevant PM_FLAG(S) */
const char *string; /* String for verbose output */
int typeflag; /* Flag for typeset -? */
int flags; /* The enum above */
};
static const struct paramtypes pmtypes[] = {
{ PM_AUTOLOAD, "undefined", 0, 0},
{ PM_INTEGER, "integer", 'i', PMTF_USE_BASE},
{ PM_EFLOAT, "float", 'E', 0},
{ PM_FFLOAT, "float", 'F', 0},
{ PM_ARRAY, "array", 'a', 0},
{ PM_HASHED, "association", 'A', 0},
{ 0, "local", 0, PMTF_TEST_LEVEL},
{ PM_HIDE, "hide", 'h', 0 },
{ PM_LEFT, "left justified", 'L', PMTF_USE_WIDTH},
{ PM_RIGHT_B, "right justified", 'R', PMTF_USE_WIDTH},
{ PM_RIGHT_Z, "zero filled", 'Z', PMTF_USE_WIDTH},
{ PM_LOWER, "lowercase", 'l', 0},
{ PM_UPPER, "uppercase", 'u', 0},
{ PM_READONLY, "readonly", 'r', 0},
{ PM_TAGGED, "tagged", 't', 0},
{ PM_EXPORTED, "exported", 'x', 0},
{ PM_UNIQUE, "unique", 'U', 0},
{ PM_TIED, "tied", 'T', 0},
{ PM_NAMEREF, "nameref", 'n', 0}
};
#define PMTYPES_SIZE ((int)(sizeof(pmtypes)/sizeof(struct paramtypes)))
static void
printparamvalue(Param p, int printflags)
{
char *t, **u;
if (!(printflags & PRINT_KV_PAIR))
putchar('=');
/* How the value is displayed depends *
* on the type of the parameter */
switch (PM_TYPE(p->node.flags)) {
case PM_SCALAR:
/* string: simple output */
if (p->gsu.s->getfn && (t = p->gsu.s->getfn(p)))
quotedzputs(t, stdout);
break;
case PM_INTEGER:
/* integer */
#ifdef ZSH_64_BIT_TYPE
fputs(output64(p->gsu.i->getfn(p)), stdout);
#else
printf("%ld", p->gsu.i->getfn(p));
#endif
break;
case PM_EFLOAT:
case PM_FFLOAT:
/* float */
convfloat(p->gsu.f->getfn(p), p->base, p->node.flags, stdout);
break;
case PM_ARRAY:
/* array */
if (!(printflags & PRINT_KV_PAIR)) {
putchar('(');
if (!(printflags & PRINT_LINE))
putchar(' ');
}
u = p->gsu.a->getfn(p);
if(*u) {
if (printflags & PRINT_LINE) {
if (printflags & PRINT_KV_PAIR)
printf(" ");
else
printf("\n ");
}
quotedzputs(*u++, stdout);
while (*u) {
if (printflags & PRINT_LINE)
printf("\n ");
else
putchar(' ');
quotedzputs(*u++, stdout);
}
if ((printflags & (PRINT_LINE|PRINT_KV_PAIR)) == PRINT_LINE)
putchar('\n');
}
if (!(printflags & PRINT_KV_PAIR)) {
if (!(printflags & PRINT_LINE))
putchar(' ');
putchar(')');
}
break;
case PM_HASHED:
/* association */
{
HashTable ht;
int found = 0;
if (!(printflags & PRINT_KV_PAIR)) {
putchar('(');
if (!(printflags & PRINT_LINE))
putchar(' ');
}
ht = p->gsu.h->getfn(p);
if (ht)
found = scanhashtable(ht, 1, 0, PM_UNSET,
ht->printnode, PRINT_KV_PAIR |
(printflags & PRINT_LINE));
if (!(printflags & PRINT_KV_PAIR)) {
if (found && (printflags & PRINT_LINE))
putchar('\n');
putchar(')');
}
}
break;
}
}
/**/
mod_export void
printparamnode(HashNode hn, int printflags)
{
Param p = (Param) hn;
Param peer = NULL;
int altname = 0;
if (!(p->node.flags & PM_HASHELEM) &&
!(printflags & PRINT_WITH_NAMESPACE) && *(p->node.nam) == '.')
return;
if (p->node.flags & PM_UNSET) {
if ((printflags & (PRINT_POSIX_READONLY|PRINT_POSIX_EXPORT) &&
p->node.flags & (PM_READONLY|PM_EXPORTED)) ||
(p->node.flags & PM_DEFAULTED) == PM_DEFAULTED) {
/*
* Special POSIX rules: show the parameter as readonly/exported
* even though it's unset, but with no value.
*/
printflags |= PRINT_NAMEONLY;
}
else
return;
}
if (p->node.flags & PM_AUTOLOAD)
printflags |= PRINT_NAMEONLY;
if (printflags & (PRINT_TYPESET|PRINT_POSIX_READONLY|PRINT_POSIX_EXPORT)) {
if (p->node.flags & PM_AUTOLOAD) {
/*
* It's not possible to restore the state of
* these, so don't output.
*/
return;
}
if (p->node.flags & PM_RO_BY_DESIGN) {
/*
* Compromise: cannot be restored out of context,
* but show anyway if printed in scope of declaration
*/
if (p->level != locallevel || p->level == 0)
return;
}
/*
* The zsh variants of export -p/readonly -p also report other
* flags to indicate other attributes or scope. The POSIX variants
* don't.
*/
if (printflags & PRINT_POSIX_EXPORT) {
if (!(p->node.flags & PM_EXPORTED))
return;
altname = 'x';
printf("export ");
} else if (printflags & PRINT_POSIX_READONLY) {
if (!(p->node.flags & PM_READONLY))
return;
altname = 'r';
printf("readonly ");
} else if ((p->node.flags & PM_EXPORTED) &&
!(p->node.flags & (PM_ARRAY|PM_HASHED))) {
if (p->level && p->level >= locallevel)
printf("local ");
else {
altname = 'x';
printf("export ");
}
} else if (locallevel && p->level >= locallevel) {
if (p->node.flags & PM_EXPORTED)
printf("local ");
else
printf("typeset "); /* printf("local "); */
} else if (locallevel) {
printf("typeset -g ");
} else
printf("typeset ");
}
/* Print the attributes of the parameter */
if (printflags & (PRINT_TYPE|PRINT_TYPESET)) {
int doneminus = 0, i;
const struct paramtypes *pmptr;
for (pmptr = pmtypes, i = 0; i < PMTYPES_SIZE; i++, pmptr++) {
int doprint = 0;
if (altname && altname == pmptr->typeflag)
continue;
if (pmptr->flags & PMTF_TEST_LEVEL) {
if (p->level) {
/*
if ((p->node.flags & PM_SPECIAL) &&
(p->node.flags & PM_LOCAL) &&
!(p->node.flags & PM_HIDE)) {
if (doneminus)
putchar(' ');
printf("+h ");
doneminus = 0;
}
*/
doprint = 1;
}
} else if ((pmptr->binflag != PM_EXPORTED || p->level ||
(p->node.flags & (PM_LOCAL|PM_ARRAY|PM_HASHED))) &&
(p->node.flags & pmptr->binflag))
doprint = 1;
if (doprint) {
if (printflags & PRINT_TYPESET) {
if (pmptr->typeflag) {
if (!doneminus) {
putchar('-');
doneminus = 1;
}
putchar(pmptr->typeflag);
}
} else
printf("%s ", pmptr->string);
if ((pmptr->flags & PMTF_USE_BASE) && p->base) {
printf("%d ", p->base);
doneminus = 0;
}
if ((pmptr->flags & PMTF_USE_WIDTH) && p->width) {
printf("%u ", p->width);
doneminus = 0;
}
}
}
if (doneminus)
putchar(' ');
if (p->node.flags & PM_TIED) {
/*
* For scalars tied to arrays,s
* * typeset +m outputs
* array tied SCALAR array
* tied array SCALAR
* * typeset -p outputs:
* typeset -T SCALAR array (for hidden values)
* typeset -T SCALAR array=(values)
* for both scalar and array (flags may be different)
*
* We choose to print the value for the array instead of the scalar
* as scalars can't disambiguate between
* typeset -T SCALAR array=()
* and
* typeset -T SCALAR array=('')
* (same for (a b:c)...)
*/
Param tmp = (Param) paramtab->getnode(paramtab, p->ename);
/*
* Swap param and tied peer for typeset -p output
*/
if (!(printflags & PRINT_TYPESET) || (p->node.flags & PM_ARRAY))
peer = tmp;
else {
peer = p;
p = tmp;
}
quotedzputs(peer->node.nam, stdout);
putchar(' ');
}
}
if ((printflags & PRINT_NAMEONLY) ||
((p->node.flags & PM_HIDEVAL) && !(printflags & PRINT_INCLUDEVALUE)))
quotedzputs(p->node.nam, stdout);
else {
if (printflags & PRINT_KV_PAIR) {
if (printflags & PRINT_LINE)
printf("\n ");
putchar('[');
}
quotedzputs(p->node.nam, stdout);
if (printflags & PRINT_KV_PAIR)
printf("]=");
printparamvalue(p, printflags);
}
if (peer && (printflags & PRINT_TYPESET) && !(p->node.flags & PM_SPECIAL)) {
/*
* append the join char for tied parameters if different from colon
* for typeset -p output.
*/
unsigned char joinchar = (unsigned char) ((struct tieddata *)peer->u.data)->joinchar;
if (joinchar != ':') {
char buf[2];
buf[0] = joinchar;
buf[1] = '\0';
putchar(' ');
quotedzputs(buf, stdout);
}
}
if ((printflags & (PRINT_KV_PAIR|PRINT_LINE)) == PRINT_KV_PAIR)
putchar(' ');
else if (!(printflags & PRINT_KV_PAIR))
putchar('\n');
}
/**/
mod_export HashNode
resolve_nameref(Param pm, const Asgment stop)
{
HashNode hn = (HashNode)pm;
const char *seek = stop ? stop->value.scalar : NULL;
if (pm && (pm->node.flags & PM_NAMEREF)) {
char *refname = GETREFNAME(pm);
if (pm->node.flags & (PM_UNSET|PM_TAGGED)) {
/* Semaphore with createparam() */
pm->node.flags &= ~PM_UNSET;
if (pm->node.flags & PM_NEWREF) /* See setloopvar() */
return NULL;
if (refname && *refname && (pm->node.flags & PM_TAGGED))
pm->node.flags |= PM_SELFREF; /* See setscope() */
return (HashNode) pm;
} else if (refname) {
if ((pm->node.flags & PM_TAGGED) ||
(stop && strcmp(refname, stop->name) == 0)) {
/* zwarnnam(refname, "invalid self reference"); */
return stop ? (HashNode)pm : NULL;
}
if (*refname)
seek = refname;
}
}
else if (pm) {
if (!(stop && (stop->flags & PM_NAMEREF)))
return (HashNode)pm;
if (!(pm->node.flags & PM_NAMEREF))
return (pm->level < locallevel ? NULL : (HashNode)pm);
}
if (seek) {
queue_signals();
/* pm->width is the offset of any subscript */
if (pm && (pm->node.flags & PM_NAMEREF) && pm->width) {
if (stop) {
if (stop->flags & PM_NAMEREF)
hn = (HashNode)pm;
else
hn = NULL;
} else {
/* this has to be the end of any chain */
hn = (HashNode)pm; /* see fetchvalue() */
}
} else if ((hn = gethashnode2(realparamtab, seek))) {
if (pm) {
if (!(stop && (stop->flags & (PM_LOCAL)))) {
int scope = ((pm->node.flags & PM_NAMEREF) ?
((pm->node.flags & PM_UPPER) ? -1 :
pm->base) : ((Param)hn)->level);
hn = (HashNode)upscope((Param)hn, scope);
}
/* user can't tag a nameref, safe for loop detection */
pm->node.flags |= PM_TAGGED;
}
if (hn) {
if (hn->flags & PM_AUTOLOAD)
hn = getparamnode(realparamtab, seek);
if (!(hn->flags & PM_UNSET))
hn = resolve_nameref((Param)hn, stop);
}
if (pm)
pm->node.flags &= ~PM_TAGGED;
} else if (stop && (stop->flags & PM_NAMEREF))
hn = (pm && (pm->node.flags & PM_NEWREF)) ? NULL : (HashNode)pm;
unqueue_signals();
}
return hn;
}
/**/
mod_export void
setloopvar(char *name, char *value)
{
Param pm = (Param) gethashnode2(realparamtab, name);
if (pm && (pm->node.flags & PM_NAMEREF)) {
if (pm->node.flags & PM_READONLY) {
/* Bash error is: "%s: readonly variable" */
zerr("read-only reference: %s", pm->node.nam);
return;
}
pm->base = pm->width = 0;
SETREFNAME(pm, ztrdup(value));
pm->node.flags &= ~PM_UNSET;
pm->node.flags |= PM_NEWREF;
setscope(pm);
pm->node.flags &= ~PM_NEWREF;
} else
setsparam(name, value);
}
/**/
static void
setscope(Param pm)
{
queue_signals();
if (pm->node.flags & PM_NAMEREF) do {
Param basepm;
struct asgment stop;
char *refname = GETREFNAME(pm);
char *t = refname ? itype_end(refname, INAMESPC, 0) : NULL;
int q = queue_signal_level();
/* Temporarily change nameref to array parameter itself */
if (t && *t == '[')
*t = 0;
else
t = 0;
stop.name = "";
stop.value.scalar = NULL;
stop.flags = PM_NAMEREF;
if (locallevel && !(pm->node.flags & PM_UPPER))
stop.flags |= PM_LOCAL;
dont_queue_signals(); /* Prevent unkillable loops */
basepm = (Param)resolve_nameref(pm, &stop);
restore_queue_signals(q);
if (t) {
pm->width = t - refname;
*t = '[';
}
if (basepm) {
if (basepm->node.flags & PM_NAMEREF) {
if (pm == basepm) {
if (pm->node.flags & PM_SELFREF) {
/* Loop signalled by resolve_nameref() */
if (upscope(pm, pm->base) == pm) {
zerr("%s: invalid self reference", refname);
unsetparam_pm(pm, 0, 1);
break;
}
pm->node.flags &= ~PM_SELFREF;
} else if (pm->base == pm->level) {
if (refname && *refname &&
strcmp(pm->node.nam, refname) == 0) {
zerr("%s: invalid self reference", refname);
unsetparam_pm(pm, 0, 1);
break;
}
}
} else if ((t = GETREFNAME(basepm))) {
if (basepm->base <= basepm->level &&
strcmp(pm->node.nam, t) == 0) {
zerr("%s: invalid self reference", refname);
unsetparam_pm(pm, 0, 1);
break;
}
}
} else
pm->base = basepm->level;
}
if (pm->base > pm->level) {
if (EMULATION(EMULATE_KSH)) {
zerr("%s: global reference cannot refer to local variable",
pm->node.nam);
unsetparam_pm(pm, 0, 1);
} else if (isset(WARNNESTEDVAR))
zwarn("reference %s in enclosing scope set to local variable %s",
pm->node.nam, refname);
}
if (refname && upscope(pm, pm->base) == pm &&
strcmp(pm->node.nam, refname) == 0) {
zerr("%s: invalid self reference", refname);
unsetparam_pm(pm, 0, 1);
}
} while (0);
unqueue_signals();
}
/**/
mod_export Param
upscope(Param pm, int reflevel)
{
Param up = pm->old;
while (up && up->level >= reflevel) {
pm = up;
up = up->old;
}
if (reflevel < 0 && locallevel > 0)
return pm->level == locallevel ? up : pm;
return pm;
}
/**/
mod_export int
valid_refname(char *val)
{
char *t = itype_end(val, INAMESPC, 0);
if (idigit(*val))
return 0;
if (*t != 0) {
if (*t == '[') {
tokenize(t = dupstring(t+1));
while ((t = parse_subscript(t, 0, ']')) && *t++ == Outbrack) {
if (*t == Inbrack)
++t;
else
break;
}
if (t && *t) {
/* zwarn("%s: stuff after subscript: %s", val, t); */
t = NULL;
}
} else if (t[1] || !(*t == '!' || *t == '?' ||
*t == '$' || *t == '-' ||
*t == '0' || *t == '_')) {
/* Skipping * @ # because of doshfunc() implementation */
t = NULL;
}
}
return !!t;
}