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zsh/Src/options.c
Peter Stephenson f37c181b29 43008: Improve code to remove privileges. 
Remove warnings of unused values as we always check the finally
result later.

Put segid before setuid as the setgid could fail if UID
no longer privileged.
2018-06-15 10:27:29 +01:00

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/*
* options.c - shell options
*
* 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 "options.pro"
/* current emulation (used to decide which set of option letters is used) */
/**/
mod_export int emulation;
/* current sticky emulation: sticky = NULL means none */
/**/
mod_export Emulation_options sticky;
/* the options; e.g. if opts[SHGLOB] != 0, SH_GLOB is turned on */
/**/
mod_export char opts[OPT_SIZE];
/* Option name hash table */
/**/
mod_export HashTable optiontab;
/* The canonical option name table */
#define OPT_CSH EMULATE_CSH
#define OPT_KSH EMULATE_KSH
#define OPT_SH EMULATE_SH
#define OPT_ZSH EMULATE_ZSH
#define OPT_ALL (OPT_CSH|OPT_KSH|OPT_SH|OPT_ZSH)
#define OPT_BOURNE (OPT_KSH|OPT_SH)
#define OPT_BSHELL (OPT_KSH|OPT_SH|OPT_ZSH)
#define OPT_NONBOURNE (OPT_ALL & ~OPT_BOURNE)
#define OPT_NONZSH (OPT_ALL & ~OPT_ZSH)
/* option is relevant to emulation */
#define OPT_EMULATE (EMULATE_UNUSED)
/* option should never be set by emulate() */
#define OPT_SPECIAL (EMULATE_UNUSED<<1)
/* option is an alias to an other option */
#define OPT_ALIAS (EMULATE_UNUSED<<2)
#define defset(X, my_emulation) (!!((X)->node.flags & my_emulation))
/*
* Note that option names should usually be fewer than 20 characters long
* to avoid formatting problems.
*/
static struct optname optns[] = {
{{NULL, "aliases", OPT_EMULATE|OPT_ALL}, ALIASESOPT},
{{NULL, "aliasfuncdef", OPT_EMULATE|OPT_BOURNE}, ALIASFUNCDEF},
{{NULL, "allexport", OPT_EMULATE}, ALLEXPORT},
{{NULL, "alwayslastprompt", OPT_ALL}, ALWAYSLASTPROMPT},
{{NULL, "alwaystoend", 0}, ALWAYSTOEND},
{{NULL, "appendcreate", OPT_EMULATE|OPT_BOURNE}, APPENDCREATE},
{{NULL, "appendhistory", OPT_ALL}, APPENDHISTORY},
{{NULL, "autocd", OPT_EMULATE}, AUTOCD},
{{NULL, "autocontinue", 0}, AUTOCONTINUE},
{{NULL, "autolist", OPT_ALL}, AUTOLIST},
{{NULL, "automenu", OPT_ALL}, AUTOMENU},
{{NULL, "autonamedirs", 0}, AUTONAMEDIRS},
{{NULL, "autoparamkeys", OPT_ALL}, AUTOPARAMKEYS},
{{NULL, "autoparamslash", OPT_ALL}, AUTOPARAMSLASH},
{{NULL, "autopushd", 0}, AUTOPUSHD},
{{NULL, "autoremoveslash", OPT_ALL}, AUTOREMOVESLASH},
{{NULL, "autoresume", 0}, AUTORESUME},
{{NULL, "badpattern", OPT_EMULATE|OPT_NONBOURNE},BADPATTERN},
{{NULL, "banghist", OPT_NONBOURNE}, BANGHIST},
{{NULL, "bareglobqual", OPT_EMULATE|OPT_ZSH}, BAREGLOBQUAL},
{{NULL, "bashautolist", 0}, BASHAUTOLIST},
{{NULL, "bashrematch", 0}, BASHREMATCH},
{{NULL, "beep", OPT_ALL}, BEEP},
{{NULL, "bgnice", OPT_EMULATE|OPT_NONBOURNE},BGNICE},
{{NULL, "braceccl", OPT_EMULATE}, BRACECCL},
{{NULL, "bsdecho", OPT_EMULATE|OPT_SH}, BSDECHO},
{{NULL, "caseglob", OPT_ALL}, CASEGLOB},
{{NULL, "casematch", OPT_ALL}, CASEMATCH},
{{NULL, "cbases", 0}, CBASES},
{{NULL, "cprecedences", OPT_EMULATE|OPT_NONZSH}, CPRECEDENCES},
{{NULL, "cdablevars", OPT_EMULATE}, CDABLEVARS},
{{NULL, "chasedots", OPT_EMULATE}, CHASEDOTS},
{{NULL, "chaselinks", OPT_EMULATE}, CHASELINKS},
{{NULL, "checkjobs", OPT_EMULATE|OPT_ZSH}, CHECKJOBS},
{{NULL, "checkrunningjobs", OPT_EMULATE|OPT_ZSH}, CHECKRUNNINGJOBS},
{{NULL, "clobber", OPT_EMULATE|OPT_ALL}, CLOBBER},
{{NULL, "combiningchars", 0}, COMBININGCHARS},
{{NULL, "completealiases", 0}, COMPLETEALIASES},
{{NULL, "completeinword", 0}, COMPLETEINWORD},
{{NULL, "continueonerror", 0}, CONTINUEONERROR},
{{NULL, "correct", 0}, CORRECT},
{{NULL, "correctall", 0}, CORRECTALL},
{{NULL, "cshjunkiehistory", OPT_EMULATE|OPT_CSH}, CSHJUNKIEHISTORY},
{{NULL, "cshjunkieloops", OPT_EMULATE|OPT_CSH}, CSHJUNKIELOOPS},
{{NULL, "cshjunkiequotes", OPT_EMULATE|OPT_CSH}, CSHJUNKIEQUOTES},
{{NULL, "cshnullcmd", OPT_EMULATE|OPT_CSH}, CSHNULLCMD},
{{NULL, "cshnullglob", OPT_EMULATE|OPT_CSH}, CSHNULLGLOB},
{{NULL, "debugbeforecmd", OPT_ALL}, DEBUGBEFORECMD},
{{NULL, "emacs", 0}, EMACSMODE},
{{NULL, "equals", OPT_EMULATE|OPT_ZSH}, EQUALS},
{{NULL, "errexit", OPT_EMULATE}, ERREXIT},
{{NULL, "errreturn", OPT_EMULATE}, ERRRETURN},
{{NULL, "exec", OPT_ALL}, EXECOPT},
{{NULL, "extendedglob", OPT_EMULATE}, EXTENDEDGLOB},
{{NULL, "extendedhistory", OPT_CSH}, EXTENDEDHISTORY},
{{NULL, "evallineno", OPT_EMULATE|OPT_ZSH}, EVALLINENO},
{{NULL, "flowcontrol", OPT_ALL}, FLOWCONTROL},
{{NULL, "forcefloat", 0}, FORCEFLOAT},
{{NULL, "functionargzero", OPT_EMULATE|OPT_NONBOURNE},FUNCTIONARGZERO},
{{NULL, "glob", OPT_EMULATE|OPT_ALL}, GLOBOPT},
{{NULL, "globalexport", OPT_EMULATE|OPT_ZSH}, GLOBALEXPORT},
{{NULL, "globalrcs", OPT_ALL}, GLOBALRCS},
{{NULL, "globassign", OPT_EMULATE|OPT_CSH}, GLOBASSIGN},
{{NULL, "globcomplete", 0}, GLOBCOMPLETE},
{{NULL, "globdots", OPT_EMULATE}, GLOBDOTS},
{{NULL, "globstarshort", OPT_EMULATE}, GLOBSTARSHORT},
{{NULL, "globsubst", OPT_EMULATE|OPT_NONZSH}, GLOBSUBST},
{{NULL, "hashcmds", OPT_ALL}, HASHCMDS},
{{NULL, "hashdirs", OPT_ALL}, HASHDIRS},
{{NULL, "hashexecutablesonly", 0}, HASHEXECUTABLESONLY},
{{NULL, "hashlistall", OPT_ALL}, HASHLISTALL},
{{NULL, "histallowclobber", 0}, HISTALLOWCLOBBER},
{{NULL, "histbeep", OPT_ALL}, HISTBEEP},
{{NULL, "histexpiredupsfirst",0}, HISTEXPIREDUPSFIRST},
{{NULL, "histfcntllock", 0}, HISTFCNTLLOCK},
{{NULL, "histfindnodups", 0}, HISTFINDNODUPS},
{{NULL, "histignorealldups", 0}, HISTIGNOREALLDUPS},
{{NULL, "histignoredups", 0}, HISTIGNOREDUPS},
{{NULL, "histignorespace", 0}, HISTIGNORESPACE},
{{NULL, "histlexwords", 0}, HISTLEXWORDS},
{{NULL, "histnofunctions", 0}, HISTNOFUNCTIONS},
{{NULL, "histnostore", 0}, HISTNOSTORE},
{{NULL, "histsubstpattern", OPT_EMULATE}, HISTSUBSTPATTERN},
{{NULL, "histreduceblanks", 0}, HISTREDUCEBLANKS},
{{NULL, "histsavebycopy", OPT_ALL}, HISTSAVEBYCOPY},
{{NULL, "histsavenodups", 0}, HISTSAVENODUPS},
{{NULL, "histverify", 0}, HISTVERIFY},
{{NULL, "hup", OPT_EMULATE|OPT_ZSH}, HUP},
{{NULL, "ignorebraces", OPT_EMULATE|OPT_SH}, IGNOREBRACES},
{{NULL, "ignoreclosebraces", OPT_EMULATE}, IGNORECLOSEBRACES},
{{NULL, "ignoreeof", 0}, IGNOREEOF},
{{NULL, "incappendhistory", 0}, INCAPPENDHISTORY},
{{NULL, "incappendhistorytime", 0}, INCAPPENDHISTORYTIME},
{{NULL, "interactive", OPT_SPECIAL}, INTERACTIVE},
{{NULL, "interactivecomments",OPT_BOURNE}, INTERACTIVECOMMENTS},
{{NULL, "ksharrays", OPT_EMULATE|OPT_BOURNE}, KSHARRAYS},
{{NULL, "kshautoload", OPT_EMULATE|OPT_BOURNE}, KSHAUTOLOAD},
{{NULL, "kshglob", OPT_EMULATE|OPT_KSH}, KSHGLOB},
{{NULL, "kshoptionprint", OPT_EMULATE|OPT_KSH}, KSHOPTIONPRINT},
{{NULL, "kshtypeset", 0}, KSHTYPESET},
{{NULL, "kshzerosubscript", 0}, KSHZEROSUBSCRIPT},
{{NULL, "listambiguous", OPT_ALL}, LISTAMBIGUOUS},
{{NULL, "listbeep", OPT_ALL}, LISTBEEP},
{{NULL, "listpacked", 0}, LISTPACKED},
{{NULL, "listrowsfirst", 0}, LISTROWSFIRST},
{{NULL, "listtypes", OPT_ALL}, LISTTYPES},
{{NULL, "localoptions", OPT_EMULATE|OPT_KSH}, LOCALOPTIONS},
{{NULL, "localloops", OPT_EMULATE}, LOCALLOOPS},
{{NULL, "localpatterns", OPT_EMULATE}, LOCALPATTERNS},
{{NULL, "localtraps", OPT_EMULATE|OPT_KSH}, LOCALTRAPS},
{{NULL, "login", OPT_SPECIAL}, LOGINSHELL},
{{NULL, "longlistjobs", 0}, LONGLISTJOBS},
{{NULL, "magicequalsubst", OPT_EMULATE}, MAGICEQUALSUBST},
{{NULL, "mailwarning", 0}, MAILWARNING},
{{NULL, "markdirs", 0}, MARKDIRS},
{{NULL, "menucomplete", 0}, MENUCOMPLETE},
{{NULL, "monitor", OPT_SPECIAL}, MONITOR},
{{NULL, "multibyte",
#ifdef MULTIBYTE_SUPPORT
OPT_ALL
#else
0
#endif
}, MULTIBYTE},
{{NULL, "multifuncdef", OPT_EMULATE|OPT_ZSH}, MULTIFUNCDEF},
{{NULL, "multios", OPT_EMULATE|OPT_ZSH}, MULTIOS},
{{NULL, "nomatch", OPT_EMULATE|OPT_NONBOURNE},NOMATCH},
{{NULL, "notify", OPT_ZSH}, NOTIFY},
{{NULL, "nullglob", OPT_EMULATE}, NULLGLOB},
{{NULL, "numericglobsort", OPT_EMULATE}, NUMERICGLOBSORT},
{{NULL, "octalzeroes", OPT_EMULATE|OPT_SH}, OCTALZEROES},
{{NULL, "overstrike", 0}, OVERSTRIKE},
{{NULL, "pathdirs", OPT_EMULATE}, PATHDIRS},
{{NULL, "pathscript", OPT_EMULATE|OPT_BOURNE}, PATHSCRIPT},
{{NULL, "pipefail", OPT_EMULATE}, PIPEFAIL},
{{NULL, "posixaliases", OPT_EMULATE|OPT_BOURNE}, POSIXALIASES},
{{NULL, "posixargzero", OPT_EMULATE}, POSIXARGZERO},
{{NULL, "posixbuiltins", OPT_EMULATE|OPT_BOURNE}, POSIXBUILTINS},
{{NULL, "posixcd", OPT_EMULATE|OPT_BOURNE}, POSIXCD},
{{NULL, "posixidentifiers", OPT_EMULATE|OPT_BOURNE}, POSIXIDENTIFIERS},
{{NULL, "posixjobs", OPT_EMULATE|OPT_BOURNE}, POSIXJOBS},
{{NULL, "posixstrings", OPT_EMULATE|OPT_BOURNE}, POSIXSTRINGS},
{{NULL, "posixtraps", OPT_EMULATE|OPT_BOURNE}, POSIXTRAPS},
{{NULL, "printeightbit", 0}, PRINTEIGHTBIT},
{{NULL, "printexitvalue", 0}, PRINTEXITVALUE},
{{NULL, "privileged", OPT_SPECIAL}, PRIVILEGED},
{{NULL, "promptbang", OPT_KSH}, PROMPTBANG},
{{NULL, "promptcr", OPT_ALL}, PROMPTCR},
{{NULL, "promptpercent", OPT_NONBOURNE}, PROMPTPERCENT},
{{NULL, "promptsp", OPT_ALL}, PROMPTSP},
{{NULL, "promptsubst", OPT_BOURNE}, PROMPTSUBST},
{{NULL, "pushdignoredups", OPT_EMULATE}, PUSHDIGNOREDUPS},
{{NULL, "pushdminus", OPT_EMULATE}, PUSHDMINUS},
{{NULL, "pushdsilent", 0}, PUSHDSILENT},
{{NULL, "pushdtohome", OPT_EMULATE}, PUSHDTOHOME},
{{NULL, "rcexpandparam", OPT_EMULATE}, RCEXPANDPARAM},
{{NULL, "rcquotes", OPT_EMULATE}, RCQUOTES},
{{NULL, "rcs", OPT_ALL}, RCS},
{{NULL, "recexact", 0}, RECEXACT},
{{NULL, "rematchpcre", 0}, REMATCHPCRE},
{{NULL, "restricted", OPT_SPECIAL}, RESTRICTED},
{{NULL, "rmstarsilent", OPT_BOURNE}, RMSTARSILENT},
{{NULL, "rmstarwait", 0}, RMSTARWAIT},
{{NULL, "sharehistory", OPT_KSH}, SHAREHISTORY},
{{NULL, "shfileexpansion", OPT_EMULATE|OPT_BOURNE}, SHFILEEXPANSION},
{{NULL, "shglob", OPT_EMULATE|OPT_BOURNE}, SHGLOB},
{{NULL, "shinstdin", OPT_SPECIAL}, SHINSTDIN},
{{NULL, "shnullcmd", OPT_EMULATE|OPT_BOURNE}, SHNULLCMD},
{{NULL, "shoptionletters", OPT_EMULATE|OPT_BOURNE}, SHOPTIONLETTERS},
{{NULL, "shortloops", OPT_EMULATE|OPT_NONBOURNE},SHORTLOOPS},
{{NULL, "shwordsplit", OPT_EMULATE|OPT_BOURNE}, SHWORDSPLIT},
{{NULL, "singlecommand", OPT_SPECIAL}, SINGLECOMMAND},
{{NULL, "singlelinezle", OPT_KSH}, SINGLELINEZLE},
{{NULL, "sourcetrace", 0}, SOURCETRACE},
{{NULL, "sunkeyboardhack", 0}, SUNKEYBOARDHACK},
{{NULL, "transientrprompt", 0}, TRANSIENTRPROMPT},
{{NULL, "trapsasync", 0}, TRAPSASYNC},
{{NULL, "typesetsilent", OPT_EMULATE|OPT_BOURNE}, TYPESETSILENT},
{{NULL, "unset", OPT_EMULATE|OPT_BSHELL}, UNSET},
{{NULL, "verbose", 0}, VERBOSE},
{{NULL, "vi", 0}, VIMODE},
{{NULL, "warncreateglobal", OPT_EMULATE}, WARNCREATEGLOBAL},
{{NULL, "warnnestedvar", OPT_EMULATE}, WARNNESTEDVAR},
{{NULL, "xtrace", 0}, XTRACE},
{{NULL, "zle", OPT_SPECIAL}, USEZLE},
{{NULL, "braceexpand", OPT_ALIAS}, /* ksh/bash */ -IGNOREBRACES},
{{NULL, "dotglob", OPT_ALIAS}, /* bash */ GLOBDOTS},
{{NULL, "hashall", OPT_ALIAS}, /* bash */ HASHCMDS},
{{NULL, "histappend", OPT_ALIAS}, /* bash */ APPENDHISTORY},
{{NULL, "histexpand", OPT_ALIAS}, /* bash */ BANGHIST},
{{NULL, "log", OPT_ALIAS}, /* ksh */ -HISTNOFUNCTIONS},
{{NULL, "mailwarn", OPT_ALIAS}, /* bash */ MAILWARNING},
{{NULL, "onecmd", OPT_ALIAS}, /* bash */ SINGLECOMMAND},
{{NULL, "physical", OPT_ALIAS}, /* ksh/bash */ CHASELINKS},
{{NULL, "promptvars", OPT_ALIAS}, /* bash */ PROMPTSUBST},
{{NULL, "stdin", OPT_ALIAS}, /* ksh */ SHINSTDIN},
{{NULL, "trackall", OPT_ALIAS}, /* ksh */ HASHCMDS},
{{NULL, "dvorak", 0}, DVORAK},
{{NULL, NULL, 0}, 0}
};
/* Option letters */
#define optletters (isset(SHOPTIONLETTERS) ? kshletters : zshletters)
#define FIRST_OPT '0'
#define LAST_OPT 'y'
static short zshletters[LAST_OPT - FIRST_OPT + 1] = {
/* 0 */ CORRECT,
/* 1 */ PRINTEXITVALUE,
/* 2 */ -BADPATTERN,
/* 3 */ -NOMATCH,
/* 4 */ GLOBDOTS,
/* 5 */ NOTIFY,
/* 6 */ BGNICE,
/* 7 */ IGNOREEOF,
/* 8 */ MARKDIRS,
/* 9 */ AUTOLIST,
/* : */ 0,
/* ; */ 0,
/* < */ 0,
/* = */ 0,
/* > */ 0,
/* ? */ 0,
/* @ */ 0,
/* A */ 0, /* use with set for arrays */
/* B */ -BEEP,
/* C */ -CLOBBER,
/* D */ PUSHDTOHOME,
/* E */ PUSHDSILENT,
/* F */ -GLOBOPT,
/* G */ NULLGLOB,
/* H */ RMSTARSILENT,
/* I */ IGNOREBRACES,
/* J */ AUTOCD,
/* K */ -BANGHIST,
/* L */ SUNKEYBOARDHACK,
/* M */ SINGLELINEZLE,
/* N */ AUTOPUSHD,
/* O */ CORRECTALL,
/* P */ RCEXPANDPARAM,
/* Q */ PATHDIRS,
/* R */ LONGLISTJOBS,
/* S */ RECEXACT,
/* T */ CDABLEVARS,
/* U */ MAILWARNING,
/* V */ -PROMPTCR,
/* W */ AUTORESUME,
/* X */ LISTTYPES,
/* Y */ MENUCOMPLETE,
/* Z */ USEZLE,
/* [ */ 0,
/* \ */ 0,
/* ] */ 0,
/* ^ */ 0,
/* _ */ 0,
/* ` */ 0,
/* a */ ALLEXPORT,
/* b */ 0, /* in non-Bourne shells, end of options */
/* c */ 0, /* command follows */
/* d */ -GLOBALRCS,
/* e */ ERREXIT,
/* f */ -RCS,
/* g */ HISTIGNORESPACE,
/* h */ HISTIGNOREDUPS,
/* i */ INTERACTIVE,
/* j */ 0,
/* k */ INTERACTIVECOMMENTS,
/* l */ LOGINSHELL,
/* m */ MONITOR,
/* n */ -EXECOPT,
/* o */ 0, /* long option name follows */
/* p */ PRIVILEGED,
/* q */ 0,
/* r */ RESTRICTED,
/* s */ SHINSTDIN,
/* t */ SINGLECOMMAND,
/* u */ -UNSET,
/* v */ VERBOSE,
/* w */ CHASELINKS,
/* x */ XTRACE,
/* y */ SHWORDSPLIT,
};
static short kshletters[LAST_OPT - FIRST_OPT + 1] = {
/* 0 */ 0,
/* 1 */ 0,
/* 2 */ 0,
/* 3 */ 0,
/* 4 */ 0,
/* 5 */ 0,
/* 6 */ 0,
/* 7 */ 0,
/* 8 */ 0,
/* 9 */ 0,
/* : */ 0,
/* ; */ 0,
/* < */ 0,
/* = */ 0,
/* > */ 0,
/* ? */ 0,
/* @ */ 0,
/* A */ 0,
/* B */ 0,
/* C */ -CLOBBER,
/* D */ 0,
/* E */ 0,
/* F */ 0,
/* G */ 0,
/* H */ 0,
/* I */ 0,
/* J */ 0,
/* K */ 0,
/* L */ 0,
/* M */ 0,
/* N */ 0,
/* O */ 0,
/* P */ 0,
/* Q */ 0,
/* R */ 0,
/* S */ 0,
/* T */ TRAPSASYNC,
/* U */ 0,
/* V */ 0,
/* W */ 0,
/* X */ MARKDIRS,
/* Y */ 0,
/* Z */ 0,
/* [ */ 0,
/* \ */ 0,
/* ] */ 0,
/* ^ */ 0,
/* _ */ 0,
/* ` */ 0,
/* a */ ALLEXPORT,
/* b */ NOTIFY,
/* c */ 0,
/* d */ 0,
/* e */ ERREXIT,
/* f */ -GLOBOPT,
/* g */ 0,
/* h */ 0,
/* i */ INTERACTIVE,
/* j */ 0,
/* k */ 0,
/* l */ LOGINSHELL,
/* m */ MONITOR,
/* n */ -EXECOPT,
/* o */ 0,
/* p */ PRIVILEGED,
/* q */ 0,
/* r */ RESTRICTED,
/* s */ SHINSTDIN,
/* t */ SINGLECOMMAND,
/* u */ -UNSET,
/* v */ VERBOSE,
/* w */ 0,
/* x */ XTRACE,
/* y */ 0,
};
/* Initialisation of the option name hash table */
/**/
static void
printoptionnode(HashNode hn, int set)
{
Optname on = (Optname) hn;
int optno = on->optno;
if (optno < 0)
optno = -optno;
if (isset(KSHOPTIONPRINT)) {
if (defset(on, emulation))
printf("no%-19s %s\n", on->node.nam, isset(optno) ? "off" : "on");
else
printf("%-21s %s\n", on->node.nam, isset(optno) ? "on" : "off");
} else if (set == (isset(optno) ^ defset(on, emulation))) {
if (set ^ isset(optno))
fputs("no", stdout);
puts(on->node.nam);
}
}
/**/
void
createoptiontable(void)
{
Optname on;
optiontab = newhashtable(101, "optiontab", NULL);
optiontab->hash = hasher;
optiontab->emptytable = NULL;
optiontab->filltable = NULL;
optiontab->cmpnodes = strcmp;
optiontab->addnode = addhashnode;
optiontab->getnode = gethashnode;
optiontab->getnode2 = gethashnode2;
optiontab->removenode = NULL;
optiontab->disablenode = disablehashnode;
optiontab->enablenode = enablehashnode;
optiontab->freenode = NULL;
optiontab->printnode = printoptionnode;
for (on = optns; on->node.nam; on++)
optiontab->addnode(optiontab, on->node.nam, on);
}
/* Emulation appropriate to the setemulate function */
static int setemulate_emulation;
/* Option array manipulated within the setemulate function */
/**/
static char *setemulate_opts;
/* Setting of default options */
/**/
static void
setemulate(HashNode hn, int fully)
{
Optname on = (Optname) hn;
/* Set options: each non-special option is set according to the *
* current emulation mode if either it is considered relevant *
* to emulation or we are doing a full emulation (as indicated *
* by the `fully' parameter). */
if (!(on->node.flags & OPT_ALIAS) &&
((fully && !(on->node.flags & OPT_SPECIAL)) ||
(on->node.flags & OPT_EMULATE)))
setemulate_opts[on->optno] = defset(on, setemulate_emulation);
}
/**/
void
installemulation(int new_emulation, char *new_opts)
{
setemulate_emulation = new_emulation;
setemulate_opts = new_opts;
scanhashtable(optiontab, 0, 0, 0, setemulate,
!!(new_emulation & EMULATE_FULLY));
}
/**/
void
emulate(const char *zsh_name, int fully, int *new_emulation, char *new_opts)
{
char ch = *zsh_name;
if (ch == 'r')
ch = zsh_name[1];
/* Work out the new emulation mode */
if (ch == 'c')
*new_emulation = EMULATE_CSH;
else if (ch == 'k')
*new_emulation = EMULATE_KSH;
else if (ch == 's' || ch == 'b')
*new_emulation = EMULATE_SH;
else
*new_emulation = EMULATE_ZSH;
if (fully)
*new_emulation |= EMULATE_FULLY;
installemulation(*new_emulation, new_opts);
if (funcstack && funcstack->tp == FS_FUNC) {
/*
* We are inside a function. Decide if it's traced.
* Pedantic note: the function in the function table isn't
* guaranteed to be what we're executing, but it's
* close enough.
*/
Shfunc shf = (Shfunc)shfunctab->getnode(shfunctab, funcstack->name);
if (shf && (shf->node.flags & (PM_TAGGED|PM_TAGGED_LOCAL))) {
/* Tracing is on, so set xtrace */
new_opts[XTRACE] = 1;
}
}
}
/* setopt, unsetopt */
/**/
static void
setoption(HashNode hn, int value)
{
dosetopt(((Optname) hn)->optno, value, 0, opts);
}
/**/
int
bin_setopt(char *nam, char **args, UNUSED(Options ops), int isun)
{
int action, optno, match = 0;
/* With no arguments or options, display options. */
if (!*args) {
scanhashtable(optiontab, 1, 0, OPT_ALIAS, optiontab->printnode, !isun);
return 0;
}
/* loop through command line options (begins with "-" or "+") */
while (*args && (**args == '-' || **args == '+')) {
action = (**args == '-') ^ isun;
if(!args[0][1])
*args = "--";
while (*++*args) {
if(**args == Meta)
*++*args ^= 32;
/* The pseudo-option `--' signifies the end of options. */
if (**args == '-') {
args++;
goto doneoptions;
} else if (**args == 'o') {
if (!*++*args)
args++;
if (!*args) {
zwarnnam(nam, "string expected after -o");
inittyptab();
return 1;
}
if(!(optno = optlookup(*args)))
zwarnnam(nam, "no such option: %s", *args);
else if(dosetopt(optno, action, 0, opts))
zwarnnam(nam, "can't change option: %s", *args);
break;
} else if(**args == 'm') {
match = 1;
} else {
if (!(optno = optlookupc(**args)))
zwarnnam(nam, "bad option: -%c", **args);
else if(dosetopt(optno, action, 0, opts))
zwarnnam(nam, "can't change option: -%c", **args);
}
}
args++;
}
doneoptions:
if (!match) {
/* Not globbing the arguments -- arguments are simply option names. */
while (*args) {
if(!(optno = optlookup(*args++)))
zwarnnam(nam, "no such option: %s", args[-1]);
else if(dosetopt(optno, !isun, 0, opts))
zwarnnam(nam, "can't change option: %s", args[-1]);
}
} else {
/* Globbing option (-m) set. */
while (*args) {
Patprog pprog;
char *s, *t;
t = s = dupstring(*args);
while (*t)
if (*t == '_')
chuck(t);
else {
/* See comment in optlookup() */
if (*t >= 'A' && *t <= 'Z')
*t = (*t - 'A') + 'a';
t++;
}
/* Expand the current arg. */
tokenize(s);
if (!(pprog = patcompile(s, PAT_HEAPDUP, NULL))) {
zwarnnam(nam, "bad pattern: %s", *args);
continue;
}
/* Loop over expansions. */
scanmatchtable(optiontab, pprog, 0, 0, OPT_ALIAS,
setoption, !isun);
args++;
}
}
inittyptab();
return 0;
}
/* Identify an option name */
/**/
mod_export int
optlookup(char const *name)
{
char *s, *t;
Optname n;
s = t = dupstring(name);
/* exorcise underscores, and change to lowercase */
while (*t)
if (*t == '_')
chuck(t);
else {
/*
* Some locales (in particular tr_TR.UTF-8) may
* have non-standard mappings of ASCII characters,
* so be careful. Option names must be ASCII so
* we don't need to be too clever.
*/
if (*t >= 'A' && *t <= 'Z')
*t = (*t - 'A') + 'a';
t++;
}
/* look up name in the table */
if (s[0] == 'n' && s[1] == 'o' &&
(n = (Optname) optiontab->getnode(optiontab, s + 2))) {
return -n->optno;
} else if ((n = (Optname) optiontab->getnode(optiontab, s)))
return n->optno;
else
return OPT_INVALID;
}
/* Identify an option letter */
/**/
int
optlookupc(char c)
{
if(c < FIRST_OPT || c > LAST_OPT)
return 0;
return optletters[c - FIRST_OPT];
}
/**/
static void
restrictparam(char *nam)
{
Param pm = (Param) paramtab->getnode(paramtab, nam);
if (pm) {
pm->node.flags |= PM_SPECIAL | PM_RESTRICTED;
return;
}
createparam(nam, PM_SCALAR | PM_UNSET | PM_SPECIAL | PM_RESTRICTED);
}
/* list of restricted parameters which are not otherwise special */
static char *rparams[] = {
"SHELL", "HISTFILE", "LD_LIBRARY_PATH", "LD_AOUT_LIBRARY_PATH",
"LD_PRELOAD", "LD_AOUT_PRELOAD", NULL
};
/* Set or unset an option, as a result of user request. The option *
* number may be negative, indicating that the sense is reversed *
* from the usual meaning of the option. */
/**/
mod_export int
dosetopt(int optno, int value, int force, char *new_opts)
{
if(!optno)
return -1;
if(optno < 0) {
optno = -optno;
value = !value;
}
if (optno == RESTRICTED) {
if (isset(RESTRICTED))
return value ? 0 : -1;
if (value) {
char **s;
for (s = rparams; *s; s++)
restrictparam(*s);
}
} else if(!force && optno == EXECOPT && !value && interact) {
/* cannot set noexec when interactive */
return -1;
} else if(!force && (optno == INTERACTIVE || optno == SHINSTDIN ||
optno == SINGLECOMMAND)) {
if (new_opts[optno] == value)
return 0;
/* it is not permitted to change the value of these options */
return -1;
} else if(!force && optno == USEZLE && value) {
/* we require a terminal in order to use ZLE */
if(!interact || SHTTY == -1 || !shout)
return -1;
} else if(optno == PRIVILEGED && !value) {
/* unsetting PRIVILEGED causes the shell to make itself unprivileged */
#ifdef HAVE_SETUID
int ignore_err;
errno = 0;
/*
* Set the GID first as if we set the UID to non-privileged it
* might be impossible to restore the GID.
*
* Some OSes (possibly no longer around) have been known to
* fail silently the first time, so we attempt the change twice.
* If it fails we are guaranteed to pick this up the second
* time, so ignore the first time.
*
* Some versions of gcc make it hard to ignore the results the
* first time, hence the following. (These are probably not
* systems that require the doubled calls.)
*/
ignore_err = setgid(getgid());
(void)ignore_err;
ignore_err = setuid(getuid());
(void)ignore_err;
if (setgid(getgid())) {
zwarn("failed to change group ID: %e", errno);
return -1;
} else if (setuid(getuid())) {
zwarn("failed to change user ID: %e", errno);
return -1;
}
#else
zwarn("setuid not available");
return -1;
#endif /* not HAVE_SETUID */
#ifdef JOB_CONTROL
} else if (!force && optno == MONITOR && value) {
if (new_opts[optno] == value)
return 0;
if (SHTTY != -1) {
origpgrp = GETPGRP();
acquire_pgrp();
} else
return -1;
#else
} else if(optno == MONITOR && value) {
return -1;
#endif /* not JOB_CONTROL */
#ifdef GETPWNAM_FAKED
} else if(optno == CDABLEVARS && value) {
return -1;
#endif /* GETPWNAM_FAKED */
} else if ((optno == EMACSMODE || optno == VIMODE) && value) {
if (sticky && sticky->emulation)
return -1;
zleentry(ZLE_CMD_SET_KEYMAP, optno);
new_opts[(optno == EMACSMODE) ? VIMODE : EMACSMODE] = 0;
} else if (optno == SUNKEYBOARDHACK) {
/* for backward compatibility */
keyboardhackchar = (value ? '`' : '\0');
}
new_opts[optno] = value;
if (optno == BANGHIST || optno == SHINSTDIN)
inittyptab();
return 0;
}
/* Function to get value for special parameter `-' */
/**/
char *
dashgetfn(UNUSED(Param pm))
{
static char buf[LAST_OPT - FIRST_OPT + 2];
char *val = buf;
int i;
for(i = 0; i <= LAST_OPT - FIRST_OPT; i++) {
int optno = optletters[i];
if(optno && ((optno > 0) ? isset(optno) : unset(-optno)))
*val++ = FIRST_OPT + i;
}
*val = '\0';
return buf;
}
/* print options for set -o/+o */
/**/
void
printoptionstates(int hadplus)
{
scanhashtable(optiontab, 1, 0, OPT_ALIAS, printoptionnodestate, hadplus);
}
/**/
static void
printoptionnodestate(HashNode hn, int hadplus)
{
Optname on = (Optname) hn;
int optno = on->optno;
if (hadplus) {
printf("set %co %s%s\n",
defset(on, emulation) != isset(optno) ? '-' : '+',
defset(on, emulation) ? "no" : "",
on->node.nam);
} else {
if (defset(on, emulation))
printf("no%-19s %s\n", on->node.nam, isset(optno) ? "off" : "on");
else
printf("%-21s %s\n", on->node.nam, isset(optno) ? "on" : "off");
}
}
/* Print option list for --help */
/**/
void
printoptionlist(void)
{
short *lp;
char c;
printf("\nNamed options:\n");
scanhashtable(optiontab, 1, 0, OPT_ALIAS, printoptionlist_printoption, 0);
printf("\nOption aliases:\n");
scanhashtable(optiontab, 1, OPT_ALIAS, 0, printoptionlist_printoption, 0);
printf("\nOption letters:\n");
for(lp = optletters, c = FIRST_OPT; c <= LAST_OPT; lp++, c++) {
if(!*lp)
continue;
printf(" -%c ", c);
printoptionlist_printequiv(*lp);
}
}
/**/
static void
printoptionlist_printoption(HashNode hn, UNUSED(int ignored))
{
Optname on = (Optname) hn;
if(on->node.flags & OPT_ALIAS) {
printf(" --%-19s ", on->node.nam);
printoptionlist_printequiv(on->optno);
} else
printf(" --%s\n", on->node.nam);
}
/**/
static void
printoptionlist_printequiv(int optno)
{
int isneg = optno < 0;
optno *= (isneg ? -1 : 1);
printf(" equivalent to --%s%s\n", isneg ? "no-" : "", optns[optno-1].node.nam);
}
/**/
static char *print_emulate_opts;
/**/
static void
print_emulate_option(HashNode hn, int fully)
{
Optname on = (Optname) hn;
if (!(on->node.flags & OPT_ALIAS) &&
((fully && !(on->node.flags & OPT_SPECIAL)) ||
(on->node.flags & OPT_EMULATE)))
{
if (!print_emulate_opts[on->optno])
fputs("no", stdout);
puts(on->node.nam);
}
}
/*
* List the settings of options associated with an emulation
*/
/**/
void list_emulate_options(char *cmdopts, int fully)
{
print_emulate_opts = cmdopts;
scanhashtable(optiontab, 1, 0, 0, print_emulate_option, fully);
}
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