2 * Copyright (c) 1991, 1993
3 * The Regents of the University of California. All rights reserved.
4 * Copyright (c) 1997-2005
5 * Herbert Xu <herbert@gondor.apana.org.au>. All rights reserved.
6 * Copyright (c) 2010-2015
7 * Jilles Tjoelker <jilles@stack.nl>. All rights reserved.
9 * This code is derived from software contributed to Berkeley by
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
20 * 4. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
39 static char sccsid[] = "@(#)expand.c 8.5 (Berkeley) 5/15/95";
42 #include <sys/cdefs.h>
43 __FBSDID("$FreeBSD$");
45 #include <sys/types.h>
61 * Routines to expand arguments to commands. We have to deal with
62 * backquotes, shell variables, and file metacharacters.
84 enum wordstate { WORD_IDLE, WORD_WS_DELIMITED, WORD_QUOTEMARK };
91 static char *expdest; /* output of current string */
92 static struct nodelist *argbackq; /* list of back quote expressions */
94 static const char *argstr(const char *, int, struct worddest *);
95 static const char *exptilde(const char *, int);
96 static const char *expari(const char *, int, struct worddest *);
97 static void expbackq(union node *, int, int, struct worddest *);
98 static void subevalvar_trim(const char *, int, int, int);
99 static int subevalvar_misc(const char *, const char *, int, int, int);
100 static const char *evalvar(const char *, int, struct worddest *);
101 static int varisset(const char *, int);
102 static void strtodest(const char *, int, int, int, struct worddest *);
103 static void reprocess(int, int, int, int, struct worddest *);
104 static void varvalue(const char *, int, int, int, struct worddest *);
105 static void expandmeta(char *, struct arglist *);
106 static void expmeta(char *, char *, struct arglist *);
107 static int expsortcmp(const void *, const void *);
108 static int patmatch(const char *, const char *);
109 static void cvtnum(int, char *);
110 static int collate_range_cmp(wchar_t, wchar_t);
113 emptyarglist(struct arglist *list)
116 list->args = list->smallarg;
118 list->capacity = sizeof(list->smallarg) / sizeof(list->smallarg[0]);
122 appendarglist(struct arglist *list, char *str)
127 if (list->count >= list->capacity) {
128 newcapacity = list->capacity * 2;
129 if (newcapacity < 16)
131 if (newcapacity > INT_MAX / (int)sizeof(newargs[0]))
132 error("Too many entries in arglist");
133 newargs = stalloc(newcapacity * sizeof(newargs[0]));
134 memcpy(newargs, list->args, list->count * sizeof(newargs[0]));
135 list->args = newargs;
136 list->capacity = newcapacity;
138 list->args[list->count++] = str;
142 collate_range_cmp(wchar_t c1, wchar_t c2)
144 static wchar_t s1[2], s2[2];
148 return (wcscoll(s1, s2));
152 stputs_quotes(const char *data, const char *syntax, char *p)
156 if (syntax[(int)*data] == CCTL)
162 #define STPUTS_QUOTES(data, syntax, p) p = stputs_quotes((data), syntax, p)
165 nextword(char c, int flag, char *p, struct worddest *dst)
169 is_ws = c == '\t' || c == '\n' || c == ' ';
170 if (p != stackblock() || (is_ws ? dst->state == WORD_QUOTEMARK :
171 dst->state != WORD_WS_DELIMITED) || c == '\0') {
174 expandmeta(grabstackstr(p), dst->list);
176 appendarglist(dst->list, grabstackstr(p));
177 dst->state = is_ws ? WORD_WS_DELIMITED : WORD_IDLE;
178 } else if (!is_ws && dst->state == WORD_WS_DELIMITED)
179 dst->state = WORD_IDLE;
180 /* Reserve space while the stack string is empty. */
181 appendarglist(dst->list, NULL);
186 #define NEXTWORD(c, flag, p, dstlist) p = nextword(c, flag, p, dstlist)
189 stputs_split(const char *data, const char *syntax, int flag, char *p,
190 struct worddest *dst)
195 ifs = ifsset() ? ifsval() : " \t\n";
199 if (strchr(ifs, c) != NULL) {
200 NEXTWORD(c, flag, p, dst);
203 if (flag & EXP_GLOB && syntax[(int)c] == CCTL)
209 #define STPUTS_SPLIT(data, syntax, flag, p, dst) p = stputs_split((data), syntax, flag, p, dst)
212 * Perform expansions on an argument, placing the resulting list of arguments
213 * in arglist. Parameter expansion, command substitution and arithmetic
214 * expansion are always performed; additional expansions can be requested
216 * The result is left in the stack string.
217 * When arglist is NULL, perform here document expansion.
219 * Caution: this function uses global state and is not reentrant.
220 * However, a new invocation after an interrupted invocation is safe
221 * and will reset the global state for the new call.
224 expandarg(union node *arg, struct arglist *arglist, int flag)
226 struct worddest exparg;
230 argbackq = arg->narg.backquote;
231 exparg.list = arglist;
232 exparg.state = WORD_IDLE;
233 STARTSTACKSTR(expdest);
234 argstr(arg->narg.text, flag, &exparg);
235 if (arglist == NULL) {
236 STACKSTRNUL(expdest);
237 return; /* here document expanded */
239 if ((flag & EXP_SPLIT) == 0 || expdest != stackblock() ||
240 exparg.state == WORD_QUOTEMARK) {
241 STPUTC('\0', expdest);
242 if (flag & EXP_SPLIT) {
244 expandmeta(grabstackstr(expdest), exparg.list);
246 appendarglist(exparg.list, grabstackstr(expdest));
249 if ((flag & EXP_SPLIT) == 0)
250 appendarglist(arglist, grabstackstr(expdest));
256 * Perform parameter expansion, command substitution and arithmetic
257 * expansion, and tilde expansion if requested via EXP_TILDE/EXP_VARTILDE.
258 * Processing ends at a CTLENDVAR or CTLENDARI character as well as '\0'.
259 * This is used to expand word in ${var+word} etc.
260 * If EXP_GLOB or EXP_CASE are set, keep and/or generate CTLESC
261 * characters to allow for further processing.
263 * If EXP_SPLIT is set, dst receives any complete words produced.
266 argstr(const char *p, int flag, struct worddest *dst)
269 int quotes = flag & (EXP_GLOB | EXP_CASE); /* do CTLESC */
274 split_lit = flag & EXP_SPLIT_LIT;
275 lit_quoted = flag & EXP_LIT_QUOTED;
276 flag &= ~(EXP_SPLIT_LIT | EXP_LIT_QUOTED);
277 if (*p == '~' && (flag & (EXP_TILDE | EXP_VARTILDE)))
278 p = exptilde(p, flag);
280 CHECKSTRSPACE(2, expdest);
289 /* "$@" syntax adherence hack */
290 if (p[0] == CTLVAR && (p[1] & VSQUOTE) != 0 &&
291 p[2] == '@' && p[3] == '=')
293 if ((flag & EXP_SPLIT) != 0 && expdest == stackblock())
294 dst->state = WORD_QUOTEMARK;
301 if (split_lit && !lit_quoted &&
302 strchr(ifsset() ? ifsval() : " \t\n", c) != NULL) {
303 NEXTWORD(c, flag, expdest, dst);
307 USTPUTC(CTLESC, expdest);
311 p = evalvar(p, flag, dst);
314 case CTLBACKQ|CTLQUOTE:
315 expbackq(argbackq->n, c & CTLQUOTE, flag, dst);
316 argbackq = argbackq->next;
319 p = expari(p, flag, dst);
324 * sort of a hack - expand tildes in variable
325 * assignments (after the first '=' and after ':'s).
327 if (split_lit && !lit_quoted &&
328 strchr(ifsset() ? ifsval() : " \t\n", c) != NULL) {
329 NEXTWORD(c, flag, expdest, dst);
333 if (flag & EXP_VARTILDE && *p == '~' &&
334 (c != '=' || firsteq)) {
337 p = exptilde(p, flag);
341 if (split_lit && !lit_quoted &&
342 strchr(ifsset() ? ifsval() : " \t\n", c) != NULL) {
343 NEXTWORD(c, flag, expdest, dst);
352 * Perform tilde expansion, placing the result in the stack string and
353 * returning the next position in the input string to process.
356 exptilde(const char *p, int flag)
359 const char *startp = p;
368 case CTLESC: /* This means CTL* are always considered quoted. */
371 case CTLBACKQ | CTLQUOTE:
377 if ((flag & EXP_VARTILDE) == 0)
383 len = p - startp - 1;
384 STPUTBIN(startp + 1, len, expdest);
385 STACKSTRNUL(expdest);
386 user = expdest - len;
388 home = lookupvar("HOME");
391 home = pw != NULL ? pw->pw_dir : NULL;
393 STADJUST(-len, expdest);
394 if (home == NULL || *home == '\0')
396 strtodest(home, flag, VSNORMAL, 1, NULL);
405 * Expand arithmetic expression.
408 expari(const char *p, int flag, struct worddest *dst)
416 quoted = *p++ == '"';
417 begoff = expdest - stackblock();
418 p = argstr(p, 0, NULL);
419 STPUTC('\0', expdest);
420 start = stackblock() + begoff;
422 q = grabstackstr(expdest);
423 result = arith(start);
424 ungrabstackstr(q, expdest);
426 start = stackblock() + begoff;
427 adj = start - expdest;
428 STADJUST(adj, expdest);
430 CHECKSTRSPACE((int)(DIGITS(result) + 1), expdest);
431 fmtstr(expdest, DIGITS(result), ARITH_FORMAT_STR, result);
432 adj = strlen(expdest);
433 STADJUST(adj, expdest);
435 reprocess(expdest - adj - stackblock(), flag, VSNORMAL, 0, dst);
441 * Perform command substitution.
444 expbackq(union node *cmd, int quoted, int flag, struct worddest *dst)
450 char *dest = expdest;
451 struct nodelist *saveargbackq;
453 char const *syntax = quoted? DQSYNTAX : BASESYNTAX;
454 int quotes = flag & (EXP_GLOB | EXP_CASE);
459 saveargbackq = argbackq;
460 p = grabstackstr(dest);
461 evalbackcmd(cmd, &in);
462 ungrabstackstr(p, dest);
463 argbackq = saveargbackq;
467 if (!quoted && flag & EXP_SPLIT)
468 ifs = ifsset() ? ifsval() : " \t\n";
471 /* Don't copy trailing newlines */
473 if (--in.nleft < 0) {
476 while ((i = read(in.fd, buf, sizeof buf)) < 0 && errno == EINTR)
478 TRACE(("expbackq: read returns %d\n", i));
491 if (strchr(ifs, '\n') != NULL) {
492 NEXTWORD('\n', flag, dest, dst);
495 CHECKSTRSPACE(nnl + 2, dest);
502 if (strchr(ifs, lastc) != NULL)
503 NEXTWORD(lastc, flag, dest, dst);
505 CHECKSTRSPACE(2, dest);
506 if (quotes && syntax[(int)lastc] == CCTL)
507 USTPUTC(CTLESC, dest);
508 USTPUTC(lastc, dest);
518 exitstatus = waitforjob(in.jp, (int *)NULL);
519 TRACE(("expbackq: size=%td: \"%.*s\"\n",
520 ((dest - stackblock()) - startloc),
521 (int)((dest - stackblock()) - startloc),
522 stackblock() + startloc));
530 recordleft(const char *str, const char *loc, char *startp)
534 amount = ((str - 1) - (loc - startp)) - expdest;
535 STADJUST(amount, expdest);
536 while (loc != str - 1)
541 subevalvar_trim(const char *p, int strloc, int subtype, int startloc)
547 struct nodelist *saveargbackq = argbackq;
550 argstr(p, EXP_CASE | EXP_TILDE, NULL);
551 STACKSTRNUL(expdest);
552 argbackq = saveargbackq;
553 startp = stackblock() + startloc;
554 str = stackblock() + strloc;
558 for (loc = startp; loc < str; loc++) {
561 if (patmatch(str, startp)) {
563 recordleft(str, loc, startp);
571 for (loc = str - 1; loc >= startp;) {
574 if (patmatch(str, startp)) {
576 recordleft(str, loc, startp);
585 for (loc = str - 1; loc >= startp;) {
586 if (patmatch(str, loc)) {
587 amount = loc - expdest;
588 STADJUST(amount, expdest);
596 for (loc = startp; loc < str - 1; loc++) {
597 if (patmatch(str, loc)) {
598 amount = loc - expdest;
599 STADJUST(amount, expdest);
609 amount = (expdest - stackblock() - strloc) + 1;
610 STADJUST(-amount, expdest);
615 subevalvar_misc(const char *p, const char *var, int subtype, int startloc,
619 struct nodelist *saveargbackq = argbackq;
622 argstr(p, EXP_TILDE, NULL);
623 STACKSTRNUL(expdest);
624 argbackq = saveargbackq;
625 startp = stackblock() + startloc;
629 setvar(var, startp, 0);
630 amount = startp - expdest;
631 STADJUST(amount, expdest);
635 if (*p != CTLENDVAR) {
636 outfmt(out2, "%s\n", startp);
639 error("%.*s: parameter %snot set", (int)(p - var - 1),
640 var, (varflags & VSNUL) ? "null or " : "");
650 * Expand a variable, and return a pointer to the next character in the
655 evalvar(const char *p, int flag, struct worddest *dst)
670 varflags = (unsigned char)*p++;
671 subtype = varflags & VSTYPE;
676 p = strchr(p, '=') + 1;
677 again: /* jump here after setting a variable with ${var=text} */
678 if (varflags & VSLINENO) {
682 } else if (special) {
683 set = varisset(var, varflags & VSNUL);
686 val = bltinlookup(var, 1);
687 if (val == NULL || ((varflags & VSNUL) && val[0] == '\0')) {
694 startloc = expdest - stackblock();
695 if (!set && uflag && *var != '@' && *var != '*') {
703 error("%.*s: parameter not set", (int)(p - var - 1),
707 if (set && subtype != VSPLUS) {
708 /* insert the value of the variable */
710 if (varflags & VSLINENO) {
711 if (p - var > (ptrdiff_t)sizeof(buf))
713 memcpy(buf, var, p - var - 1);
714 buf[p - var - 1] = '\0';
715 strtodest(buf, flag, subtype,
716 varflags & VSQUOTE, dst);
718 varvalue(var, varflags & VSQUOTE, subtype, flag,
720 if (subtype == VSLENGTH) {
721 varlenb = expdest - stackblock() - startloc;
724 val = stackblock() + startloc;
725 for (;val != expdest; val++)
726 if ((*val & 0xC0) == 0x80)
729 STADJUST(-varlenb, expdest);
732 if (subtype == VSLENGTH) {
735 (*val & 0xC0) != 0x80)
739 strtodest(val, flag, subtype,
740 varflags & VSQUOTE, dst);
744 if (subtype == VSPLUS)
750 strtodest(buf, flag, VSNORMAL, varflags & VSQUOTE, dst);
759 argstr(p, flag | (flag & EXP_SPLIT ? EXP_SPLIT_LIT : 0) |
760 (varflags & VSQUOTE ? EXP_LIT_QUOTED : 0), dst);
772 * Terminate the string and start recording the pattern
775 STPUTC('\0', expdest);
776 patloc = expdest - stackblock();
777 subevalvar_trim(p, patloc, subtype, startloc);
778 reprocess(startloc, flag, VSNORMAL, varflags & VSQUOTE, dst);
779 if (flag & EXP_SPLIT && *var == '@' && varflags & VSQUOTE)
780 dst->state = WORD_QUOTEMARK;
786 if (subevalvar_misc(p, var, subtype, startloc,
797 error("${%.*s%s}: Bad substitution", c, var,
798 (c > 0 && *p != CTLENDVAR) ? "..." : "");
804 if (subtype != VSNORMAL) { /* skip to end of alternative */
807 if ((c = *p++) == CTLESC)
809 else if (c == CTLBACKQ || c == (CTLBACKQ|CTLQUOTE)) {
811 argbackq = argbackq->next;
812 } else if (c == CTLVAR) {
813 if ((*p++ & VSTYPE) != VSNORMAL)
815 } else if (c == CTLENDVAR) {
827 * Test whether a specialized variable is set.
831 varisset(const char *name, int nulok)
835 return backgndpidset();
836 else if (*name == '@' || *name == '*') {
837 if (*shellparam.p == NULL)
843 for (av = shellparam.p; *av; av++)
848 } else if (is_digit(*name)) {
853 num = strtol(name, NULL, 10);
854 if (errno != 0 || num > shellparam.nparam)
860 ap = shellparam.p[num - 1];
862 if (nulok && (ap == NULL || *ap == '\0'))
869 strtodest(const char *p, int flag, int subtype, int quoted,
870 struct worddest *dst)
872 if (subtype == VSLENGTH || subtype == VSTRIMLEFT ||
873 subtype == VSTRIMLEFTMAX || subtype == VSTRIMRIGHT ||
874 subtype == VSTRIMRIGHTMAX)
876 else if (flag & EXP_SPLIT && !quoted && dst != NULL)
877 STPUTS_SPLIT(p, BASESYNTAX, flag, expdest, dst);
878 else if (flag & (EXP_GLOB | EXP_CASE))
879 STPUTS_QUOTES(p, quoted ? DQSYNTAX : BASESYNTAX, expdest);
885 reprocess(int startloc, int flag, int subtype, int quoted,
886 struct worddest *dst)
888 static char *buf = NULL;
889 static size_t buflen = 0;
891 size_t len, zpos, zlen;
893 startp = stackblock() + startloc;
894 len = expdest - startp;
895 if (len >= SIZE_MAX / 2)
904 while (len >= buflen)
907 buf = ckmalloc(buflen);
909 memcpy(buf, startp, len);
911 STADJUST(-len, expdest);
913 zlen = strlen(buf + zpos);
914 strtodest(buf + zpos, flag, subtype, quoted, dst);
918 if (flag & EXP_SPLIT && (quoted || (zlen > 0 && zpos < len)))
919 NEXTWORD('\0', flag, expdest, dst);
924 * Add the value of a specialized variable to the stack string.
928 varvalue(const char *name, int quoted, int subtype, int flag,
929 struct worddest *dst)
937 char buf[(NSHORTOPTS > 10 ? NSHORTOPTS : 10) + 1];
939 if (subtype == VSLENGTH)
941 splitlater = subtype == VSTRIMLEFT || subtype == VSTRIMLEFTMAX ||
942 subtype == VSTRIMRIGHT || subtype == VSTRIMRIGHTMAX;
952 num = shellparam.nparam;
955 num = backgndpidval();
959 for (i = 0 ; i < NSHORTOPTS ; i++) {
964 strtodest(buf, flag, subtype, quoted, dst);
967 if (flag & EXP_SPLIT && quoted) {
968 for (ap = shellparam.p ; (p = *ap++) != NULL ; ) {
969 strtodest(p, flag, subtype, quoted, dst);
972 STPUTC('\0', expdest);
974 NEXTWORD('\0', flag, expdest,
978 if (shellparam.nparam > 0)
979 dst->state = WORD_QUOTEMARK;
985 sep[0] = ifsval()[0];
989 for (ap = shellparam.p ; (p = *ap++) != NULL ; ) {
990 strtodest(p, flag, subtype, quoted, dst);
994 strtodest(sep, flag, subtype, quoted, dst);
995 else if (flag & EXP_SPLIT && !quoted && **ap != '\0') {
997 STPUTC('\0', expdest);
999 NEXTWORD('\0', flag, expdest, dst);
1004 if (is_digit(*name)) {
1008 else if (num > 0 && num <= shellparam.nparam)
1009 p = shellparam.p[num - 1];
1012 strtodest(p, flag, subtype, quoted, dst);
1017 strtodest(buf, flag, subtype, quoted, dst);
1022 static char expdir[PATH_MAX];
1023 #define expdir_end (expdir + sizeof(expdir))
1026 * Perform pathname generation and remove control characters.
1027 * At this point, the only control characters should be CTLESC.
1028 * The results are stored in the list dstlist.
1031 expandmeta(char *pattern, struct arglist *dstlist)
1037 firstmatch = dstlist->count;
1039 for (; (c = *p) != '\0'; p++) {
1040 /* fast check for meta chars */
1041 if (c == '*' || c == '?' || c == '[') {
1043 expmeta(expdir, pattern, dstlist);
1048 if (dstlist->count == firstmatch) {
1053 appendarglist(dstlist, pattern);
1055 qsort(&dstlist->args[firstmatch],
1056 dstlist->count - firstmatch,
1057 sizeof(dstlist->args[0]), expsortcmp);
1063 * Do metacharacter (i.e. *, ?, [...]) expansion.
1067 expmeta(char *enddir, char *name, struct arglist *arglist)
1084 for (p = name; esc = 0, *p; p += esc + 1) {
1085 if (*p == '*' || *p == '?')
1087 else if (*p == '[') {
1089 if (*q == '!' || *q == '^')
1094 if (*q == '/' || *q == '\0')
1101 } else if (*p == '\0')
1106 if (p[esc] == '/') {
1109 start = p + esc + 1;
1113 if (metaflag == 0) { /* we've reached the end of the file name */
1114 if (enddir != expdir)
1116 for (p = name ; ; p++) {
1122 if (enddir == expdir_end)
1125 if (metaflag == 0 || lstat(expdir, &statb) >= 0)
1126 appendarglist(arglist, stsavestr(expdir));
1129 endname = name + (p - name);
1130 if (start != name) {
1136 if (enddir == expdir_end)
1140 if (enddir == expdir) {
1142 } else if (enddir == expdir + 1 && *expdir == '/') {
1148 if ((dirp = opendir(p)) == NULL)
1150 if (enddir != expdir)
1152 if (*endname == 0) {
1165 while (! int_pending() && (dp = readdir(dirp)) != NULL) {
1166 if (dp->d_name[0] == '.' && ! matchdot)
1168 if (patmatch(start, dp->d_name)) {
1169 namlen = dp->d_namlen;
1170 if (enddir + namlen + 1 > expdir_end)
1172 memcpy(enddir, dp->d_name, namlen + 1);
1174 appendarglist(arglist, stsavestr(expdir));
1176 if (dp->d_type != DT_UNKNOWN &&
1177 dp->d_type != DT_DIR &&
1178 dp->d_type != DT_LNK)
1180 if (enddir + namlen + 2 > expdir_end)
1182 enddir[namlen] = '/';
1183 enddir[namlen + 1] = '\0';
1184 expmeta(enddir + namlen + 1, endname, arglist);
1190 endname[-esc - 1] = esc ? CTLESC : '/';
1195 expsortcmp(const void *p1, const void *p2)
1197 const char *s1 = *(const char * const *)p1;
1198 const char *s2 = *(const char * const *)p2;
1200 return (strcoll(s1, s2));
1206 get_wc(const char **p)
1211 chrlen = mbtowc(&c, *p, 4);
1214 else if (chrlen == -1)
1223 * See if a character matches a character class, starting at the first colon
1225 * If a valid character class is recognized, a pointer to the next character
1226 * after the final closing bracket is stored into *end, otherwise a null
1227 * pointer is stored into *end.
1230 match_charclass(const char *p, wchar_t chr, const char **end)
1233 const char *nameend;
1238 nameend = strstr(p, ":]");
1239 if (nameend == NULL || (size_t)(nameend - p) >= sizeof(name) ||
1242 memcpy(name, p, nameend - p);
1243 name[nameend - p] = '\0';
1245 cclass = wctype(name);
1246 /* An unknown class matches nothing but is valid nevertheless. */
1249 return iswctype(chr, cclass);
1254 * Returns true if the pattern matches the string.
1258 patmatch(const char *pattern, const char *string)
1260 const char *p, *q, *end;
1261 const char *bt_p, *bt_q;
1285 * A '?' does not match invalid UTF-8 but a
1286 * '*' does, so backtrack.
1298 * If the pattern ends here, we know the string
1299 * matches without needing to look at the rest of it.
1304 * First try the shortest match for the '*' that
1305 * could work. We can forget any earlier '*' since
1306 * there is no way having it match more characters
1307 * can help us, given that we are already here.
1313 const char *savep, *saveq;
1317 savep = p, saveq = q;
1319 if (*p == '!' || *p == '^') {
1331 chr = (unsigned char)*q++;
1335 p = savep, q = saveq;
1339 if (c == '[' && *p == ':') {
1340 found |= match_charclass(p, chr, &end);
1346 if (localeisutf8 && c & 0x80) {
1349 if (wc == 0) /* bad utf-8 */
1352 wc = (unsigned char)c;
1353 if (*p == '-' && p[1] != ']') {
1359 if (wc2 == 0) /* bad utf-8 */
1362 wc2 = (unsigned char)*p++;
1363 if ( collate_range_cmp(chr, wc) >= 0
1364 && collate_range_cmp(chr, wc2) <= 0
1371 } while ((c = *p++) != ']');
1372 if (found == invert)
1383 * If we have a mismatch (other than hitting the end
1384 * of the string), go back to the last '*' seen and
1385 * have it match one additional character.
1402 * Remove any CTLESC and CTLQUOTEMARK characters from a string.
1406 rmescapes(char *str)
1411 while (*p != CTLESC && *p != CTLQUOTEMARK && *p != CTLQUOTEEND) {
1417 if (*p == CTLQUOTEMARK || *p == CTLQUOTEEND) {
1431 * See if a pattern matches in a case statement.
1435 casematch(union node *pattern, const char *val)
1437 struct stackmark smark;
1441 setstackmark(&smark);
1442 argbackq = pattern->narg.backquote;
1443 STARTSTACKSTR(expdest);
1444 argstr(pattern->narg.text, EXP_TILDE | EXP_CASE, NULL);
1445 STPUTC('\0', expdest);
1446 p = grabstackstr(expdest);
1447 result = patmatch(p, val);
1448 popstackmark(&smark);
1457 cvtnum(int num, char *buf)
1461 char *p = temp + 31;
1466 *--p = num % 10 + '0';
1467 } while ((num /= 10) != 0);
1472 memcpy(buf, p, temp + 32 - p);
1476 * Do most of the work for wordexp(3).
1480 wordexpcmd(int argc, char **argv)
1485 out1fmt("%08x", argc - 1);
1486 for (i = 1, len = 0; i < argc; i++)
1487 len += strlen(argv[i]);
1488 out1fmt("%08x", (int)len);
1489 for (i = 1; i < argc; i++)
1490 outbin(argv[i], strlen(argv[i]) + 1, out1);
1495 * Do most of the work for wordexp(3), new version.
1499 freebsd_wordexpcmd(int argc __unused, char **argv __unused)
1501 struct arglist arglist;
1502 union node *args, *n;
1509 while ((ch = nextopt("f:p")) != '\0') {
1512 fd = number(shoptarg);
1519 if (*argptr != NULL)
1520 error("wrong number of arguments");
1522 error("missing fd");
1526 args = parsewordexp();
1527 popfile(); /* will also close fd */
1529 for (n = args; n != NULL; n = n->narg.next) {
1530 if (n->narg.backquote != NULL) {
1531 outcslow('C', out1);
1532 error("command substitution disabled");
1535 outcslow(' ', out1);
1536 emptyarglist(&arglist);
1537 for (n = args; n != NULL; n = n->narg.next)
1538 expandarg(n, &arglist, EXP_FULL | EXP_TILDE);
1539 for (i = 0, len = 0; i < arglist.count; i++)
1540 len += strlen(arglist.args[i]);
1541 out1fmt("%016x %016zx", arglist.count, len);
1542 for (i = 0; i < arglist.count; i++)
1543 outbin(arglist.args[i], strlen(arglist.args[i]) + 1, out1);