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52864: Change ${|var|...} to ${{var} ...}, limit local REPLY to ${|...}
This commit is contained in:
Bart Schaefer
parent
5ba43e58c2
commit
76019f7174
5 changed files with 150 additions and 56 deletions
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@ -1,5 +1,9 @@
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2024-04-01 Bart Schaefer <schaefer@zsh.org>
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* 52864: Src/lex.c, Src/subst.c, Test/D10nofork.ztst,
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Test/V10private.ztst: Change ${|var|...} to ${{var} ...},
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limit local REPLY behavior to ${|...}, update tests.
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* 52781 (and typo fix): Src/hashtable.c: HIST IGNORE_DUPS treats
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whitespace as significant when HIST_REDUCE_BLANKS is also set.
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@ -1423,7 +1423,7 @@ gettokstr(int c, int sub)
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if (lexstop)
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break;
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if (!cmdsubst && in_brace_param && act == LX2_STRING &&
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(c == '|' || c == Bar || inblank(c))) {
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(c == '|' || c == Bar || c == '{' || c == Inbrace || inblank(c))) {
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cmdsubst = in_brace_param;
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cmdpush(CS_CURSH);
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} else if (in_pattern == 2 && c != '/')
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138
Src/subst.c
138
Src/subst.c
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@ -1866,10 +1866,11 @@ paramsubst(LinkList l, LinkNode n, char **str, int qt, int pf_flags,
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* joining the array into a string (for compatibility with ksh/bash).
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*/
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int quoted_array_with_offset = 0;
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/* Indicates ${|...;} */
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char *rplyvar = NULL;
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/* Indicates ${ ... ;} */
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char *rplytmp = NULL;
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/*
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* Nofork substitution controls
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*/
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char *rplyvar = NULL; /* Indicates ${|...;} or ${{var} ...;} */
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char *rplytmp = NULL; /* Indicates ${ ... ;} */
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*s++ = '\0';
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/*
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@ -1897,14 +1898,16 @@ paramsubst(LinkList l, LinkNode n, char **str, int qt, int pf_flags,
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* flags in parentheses, but also one ksh hack.
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*/
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if (c == Inbrace) {
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/* The command string to be run by ${|...;} */
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char *cmdarg = NULL;
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/* For processing nofork command substitution string */
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char *cmdarg = NULL, *endvar = NULL, inchar = *++s;
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char *outbracep = s, sav = *s;
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Param rplypm = NULL;
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size_t slen = 0;
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int trim = (!EMULATION(EMULATE_ZSH)) ? 2 : !qt;
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inbrace = 1;
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s++;
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/* Short-path for the nofork command substitution ${|cmd;}
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inbrace = 1; /* Outer scope boolean, see above */
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/* Handling for nofork command substitution e.g. ${|cmd;}
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* See other comments about kludges for why this is here.
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*
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* The command string is extracted and executed, and the
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@ -1913,48 +1916,77 @@ paramsubst(LinkList l, LinkNode n, char **str, int qt, int pf_flags,
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* should not be part of command substitution in any case.
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* Use ${(U)${|cmd;}} as you would for ${(U)$(cmd;)}.
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*/
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if (*s == '|' || *s == Bar || inblank(*s)) {
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char *outbracep = s;
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char sav = *s;
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if (inchar == '|' || inchar == Bar || inblank(inchar)) {
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*s = Inbrace;
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if (skipparens(Inbrace, Outbrace, &outbracep) == 0) {
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if (skipparens(Inbrace, Outbrace, &outbracep) == 0)
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slen = outbracep - s - 1;
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if ((*s = sav) != Bar) {
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sav = *outbracep;
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*outbracep = '\0';
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tokenize(s);
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*outbracep = sav;
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*s = sav;
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if (inchar == '|')
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inchar = Bar; /* Simplify later compares */
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} else if (inchar == '{' || inchar == Inbrace) {
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*s = Inbrace;
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if ((outbracep = itype_end(s+1, INAMESPC, 0))) {
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if (*outbracep == Inbrack &&
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(outbracep = parse_subscript(++outbracep, 1, ']')))
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++outbracep;
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}
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/* If we reached the first close brace, find the last */
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if (outbracep && *outbracep == Outbrace) {
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char outchar = inchar == Inbrace ? Outbrace : '}';
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endvar = outbracep++;
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/* Require space to avoid ${{var}} typo for ${${var}} */
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if (!inblank(*outbracep)) {
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zerr("bad substitution");
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return NULL;
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}
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*endvar = '|'; /* Almost anything but braces/brackets */
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outbracep = s;
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if (skipparens(Inbrace, outchar, &outbracep) == 0)
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*endvar = Outbrace;
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else { /* Never happens? */
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*endvar = outchar;
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outbracep = endvar + 1;
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}
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slen = outbracep - s - 1;
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if (inchar != Inbrace)
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outbracep[-1] = Outbrace;
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*s = sav;
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inchar = Inbrace; /* Simplify later compares */
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} else {
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zerr("bad substitution");
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return NULL;
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}
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}
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if (slen > 1) {
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char *outbracep = s + slen;
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if (*outbracep == Outbrace) {
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if ((rplyvar = itype_end(s+1, INAMESPC, 0))) {
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if (*rplyvar == Inbrack &&
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(rplyvar = parse_subscript(++rplyvar, 1, ']')))
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++rplyvar;
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if (!itok(*s) || inblank(inchar)) {
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/* This tokenize() is important */
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char sav = *outbracep;
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*outbracep = '\0';
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tokenize(s);
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*outbracep = sav;
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}
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if (rplyvar == s+1 && *rplyvar == Bar) {
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/* Is ${||...} a subtitution error or a syntax error?
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zerr("bad substitution");
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return NULL;
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*/
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if (*outbracep == Outbrace) {
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if (endvar == s+1) {
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/* For consistency with ${} we allow ${{}...} */
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rplyvar = NULL;
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}
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if (rplyvar && *rplyvar == Bar) {
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cmdarg = dupstrpfx(rplyvar+1, outbracep-rplyvar-1);
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rplyvar = dupstrpfx(s+1,rplyvar-s-1);
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if (endvar && *endvar == Outbrace) {
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cmdarg = dupstrpfx(endvar+1, outbracep-endvar-1);
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rplyvar = dupstrpfx(s+1,endvar-s-1);
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} else {
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cmdarg = dupstrpfx(s+1, outbracep-s-1);
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rplyvar = "REPLY";
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}
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if (inblank(*s)) {
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if (inblank(inchar)) {
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/*
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* Admittedly a hack. Take advantage of the enforced
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* locality of REPLY and the semantics of $(<file) to
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* Admittedly a hack. Take advantage of the added
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* parameter scope and the semantics of $(<file) to
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* construct a command to write/read a temporary file.
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* Then fall through to the regular handling of $REPLY
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* Then fall through to the regular parameter handling
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* to manage word splitting, expansion flags, etc.
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*/
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char *outfmt = ">| %s {\n%s\n;}"; /* 13 */
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@ -1977,22 +2009,39 @@ paramsubst(LinkList l, LinkNode n, char **str, int qt, int pf_flags,
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}
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if (rplyvar) {
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Param pm;
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/* char *rplyval = getsparam("REPLY"); */
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/* char *rplyval = getsparam("REPLY"); cf. Future? below */
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startparamscope(); /* "local" behaves as if in a function */
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pm = createparam("REPLY", PM_LOCAL|PM_UNSET);
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if (pm) /* Shouldn't createparam() do this? */
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pm->level = locallevel;
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if (inchar == Bar) {
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/* rplyvar should be REPLY at this point, but create
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* hardwired name anyway to expose any bugs elsewhere
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*/
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rplypm = createparam("REPLY", PM_LOCAL|PM_UNSET|PM_HIDE);
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if (rplypm) /* Shouldn't createparam() do this? */
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rplypm->level = locallevel;
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/* Future? Expose global value of $REPLY if any? */
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/* if (rplyval) setsparam("REPLY", ztrdup(rplyval)); */
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} else if (inblank(inchar)) {
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rplypm = createparam(".zsh.cmdsubst",
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PM_LOCAL|PM_UNSET|PM_HIDE|
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PM_READONLY_SPECIAL);
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if (rplypm)
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rplypm->level = locallevel;
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}
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if (inchar != Inbrace && !rplypm) {
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zerr("failed to create scope for command substitution");
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return NULL;
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}
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}
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if (rplyvar && cmdarg && *cmdarg) {
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int obreaks = breaks;
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Eprog cmdprog;
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/* Execute the shell command */
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queue_signals();
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untokenize(cmdarg);
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cmdprog = parse_string(cmdarg, 0);
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if (cmdprog) {
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/* exec.c handles dont_queue_signals() */
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execode(cmdprog, 1, 0, "cmdsubst");
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cmdoutval = lastval;
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/* "return" behaves as if in a function */
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@ -2002,6 +2051,8 @@ paramsubst(LinkList l, LinkNode n, char **str, int qt, int pf_flags,
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}
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} else /* parse error */
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errflag |= ERRFLAG_ERROR;
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if (rplypm)
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rplypm->node.flags &= ~PM_READONLY_SPECIAL;
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if (rplytmp && !errflag) {
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int onoerrs = noerrs, rplylen;
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noerrs = 2;
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@ -2017,15 +2068,16 @@ paramsubst(LinkList l, LinkNode n, char **str, int qt, int pf_flags,
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}
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noerrs = onoerrs;
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if (rplylen >= 0)
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setsparam("REPLY", metafy(cmdarg, rplylen, META_REALLOC));
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setsparam(rplyvar, metafy(cmdarg, rplylen, META_REALLOC));
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}
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unqueue_signals();
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}
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if (rplytmp)
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unlink(rplytmp);
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if (rplyvar) {
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if (strcmp(rplyvar, "REPLY") == 0) {
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if ((val = dupstring(getsparam("REPLY"))))
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if (inchar != Inbrace) {
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if ((val = dupstring(getsparam(rplyvar))))
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vunset = 0;
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else {
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vunset = 1;
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@ -14,6 +14,28 @@
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0:Basic substitution and REPLY scoping
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>INNER OUTER
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reply=(x OUTER x)
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purl ${{reply} reply=(\{ INNER \})} $reply
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0:Basic substitution, brace quoting, and array result
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>{
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>INNER
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>}
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>{
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>INNER
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>}
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() {
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setopt localoptions ignorebraces
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purl ${{reply} reply=({ INNER })} $reply
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}
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0:Basic substitution, ignorebraces, and array result
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>{
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>INNER
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>}
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>{
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>INNER
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>}
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purr ${| REPLY=first}:${| REPLY=second}:$REPLY
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0:re-scoping of REPLY in one statement
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>first:second:OUTER
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@ -229,7 +251,7 @@ F:Why not use this error in the previous case as well?
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>26
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unset reply
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purl ${|reply| reply=(1 2 ${| REPLY=3 } 4) }
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purl ${{reply} reply=(1 2 ${| REPLY=3 } 4) }
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typeset -p reply
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0:array behavior with global assignment
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>1
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@ -315,7 +337,7 @@ F:status of "print" should hide return
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unset zz
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outer=GLOBAL
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purr "${|zz|
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purr "${{zz}
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local outer=LOCAL
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zz=NONLOCAL
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} $outer $?"
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@ -440,7 +462,8 @@ F:must do this before evaluating the next test block
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0:ignored braces, part 1
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>buried}
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purr "${ purr ${REPLY:-buried}}}"
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# Global $REPLY still set from earlier test
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purr "${ purr ${REPLY:+buried}}}"
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0:ignored braces, part 2
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>buried
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>}
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@ -453,6 +476,7 @@ F:must do this before evaluating the next test block
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1:ignored braces, part 4
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?(eval):3: parse error near `}'
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unsetopt ignorebraces
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# "break" blocks function calls in outer loop
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# Could use print, but that might get fixed
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repeat 3 do purr ${
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@ -467,11 +491,25 @@ F:must do this before evaluating the next test block
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?1
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?2
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print -u $ZTST_fd ${ZTST_testname}: TEST COMPLETE
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0:make sure we got to the end
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F:some tests might silently break the test harness
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# Cannot "purr": break skips pending function calls
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# Use "repeat" to avoid infinite loop on failure
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repeat 3 do; echo ${|REPLY=x; break }; done
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repeat 3 do; echo ${{x} x=y; break }; done
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repeat 3 do; echo ${ echo z; break }; done
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0:break after assignment completes the assignment
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>x
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>y
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>z
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# Subshell because error exits
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( purr ${ echo ${unset?oops} } )
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1:error handling (without crashing)
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*?*unset: oops
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purr ${ .zsh.cmdsubst=error }
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1:reserved parameter name (without crashing)
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*?*.zsh.cmdsubst: can't modify read-only parameter
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%clean
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unfunction purr purl
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unsetopt ignorebraces
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@ -497,7 +497,7 @@ F:Better if caught in checkclobberparam() but exec.c doesn't know scope
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() {
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private z=outer
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print ${(t)z} $z
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print ${| REPLY=${|z| z=nofork} }
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print ${| REPLY=${{z} z=nofork} }
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print ${(t)z} $z
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}
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0:nofork may write to private in calling function
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@ -518,9 +518,9 @@ F:Better if caught in checkclobberparam() but exec.c doesn't know scope
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() {
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private z=outer
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print ${(t)z} $z
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print ${|z|
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print ${{z}
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private q
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z=${|q| q=nofork}
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z=${{q} q=nofork}
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}
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print ${(t)z} $z
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}
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@ -533,7 +533,7 @@ F:Better if caught in checkclobberparam() but exec.c doesn't know scope
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print ${|
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() { REPLY="{$q}" }
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}
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print ${|q|
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print ${{q}
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() { q=nofork }
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}
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}
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