sh: Cache de->d_namlen in a local variable.
[dragonfly.git] / bin / sh / expand.c
CommitLineData
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1/*-
2 * Copyright (c) 1991, 1993
3 * The Regents of the University of California. All rights reserved.
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4 * Copyright (c) 1997-2005
5 * Herbert Xu <herbert@gondor.apana.org.au>. All rights reserved.
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6 *
7 * This code is derived from software contributed to Berkeley by
8 * Kenneth Almquist.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. All advertising materials mentioning features or use of this software
19 * must display the following acknowledgement:
20 * This product includes software developed by the University of
21 * California, Berkeley and its contributors.
22 * 4. Neither the name of the University nor the names of its contributors
23 * may be used to endorse or promote products derived from this software
24 * without specific prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * SUCH DAMAGE.
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37 *
38 * @(#)expand.c 8.5 (Berkeley) 5/15/95
867f2c40 39 * $FreeBSD: src/bin/sh/expand.c,v 1.92 2011/12/28 23:30:17 jilles Exp $
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40 */
41
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42#include <sys/types.h>
43#include <sys/time.h>
44#include <sys/stat.h>
984263bc 45#include <dirent.h>
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46#include <errno.h>
47#include <inttypes.h>
984263bc 48#include <limits.h>
99512ac4 49#include <pwd.h>
984263bc 50#include <stdio.h>
99512ac4 51#include <stdlib.h>
d13d0ee2 52#include <string.h>
99512ac4 53#include <unistd.h>
ead7935b 54#include <wchar.h>
215809b7 55#include <wctype.h>
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56
57/*
58 * Routines to expand arguments to commands. We have to deal with
59 * backquotes, shell variables, and file metacharacters.
60 */
61
62#include "shell.h"
63#include "main.h"
64#include "nodes.h"
65#include "eval.h"
66#include "expand.h"
67#include "syntax.h"
68#include "parser.h"
69#include "jobs.h"
70#include "options.h"
71#include "var.h"
72#include "input.h"
73#include "output.h"
74#include "memalloc.h"
75#include "error.h"
76#include "mystring.h"
77#include "arith.h"
78#include "show.h"
c3e3bc7a 79#include "builtins.h"
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80
81/*
82 * Structure specifying which parts of the string should be searched
83 * for IFS characters.
84 */
85
86struct ifsregion {
87 struct ifsregion *next; /* next region in list */
88 int begoff; /* offset of start of region */
89 int endoff; /* offset of end of region */
99512ac4 90 int inquotes; /* search for nul bytes only */
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91};
92
93
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94static char *expdest; /* output of current string */
95static struct nodelist *argbackq; /* list of back quote expressions */
96static struct ifsregion ifsfirst; /* first struct in list of ifs regions */
97static struct ifsregion *ifslastp; /* last struct in list */
98static struct arglist exparg; /* holds expanded arg list */
99
100static void argstr(char *, int);
101static char *exptilde(char *, int);
102static void expbackq(union node *, int, int);
103static int subevalvar(char *, char *, int, int, int, int, int);
104static char *evalvar(char *, int);
105static int varisset(char *, int);
106static void varvalue(char *, int, int, int);
107static void recordregion(int, int, int);
108static void removerecordregions(int);
109static void ifsbreakup(char *, struct arglist *);
110static void expandmeta(struct strlist *, int);
111static void expmeta(char *, char *);
112static void addfname(char *);
113static struct strlist *expsort(struct strlist *);
114static struct strlist *msort(struct strlist *, int);
115static char *cvtnum(int, char *);
ead7935b 116static int collate_range_cmp(wchar_t, wchar_t);
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117
118static int
ead7935b 119collate_range_cmp(wchar_t c1, wchar_t c2)
984263bc 120{
ead7935b 121 static wchar_t s1[2], s2[2];
984263bc 122
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123 s1[0] = c1;
124 s2[0] = c2;
ead7935b 125 return (wcscoll(s1, s2));
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126}
127
128/*
129 * Expand shell variables and backquotes inside a here document.
130 * union node *arg the document
131 * int fd; where to write the expanded version
132 */
133
134void
135expandhere(union node *arg, int fd)
136{
2038fb68 137 expandarg(arg, NULL, 0);
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138 xwrite(fd, stackblock(), expdest - stackblock());
139}
140
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141static char *
142stputs_quotes(const char *data, const char *syntax, char *p)
143{
144 while (*data) {
145 CHECKSTRSPACE(2, p);
146 if (syntax[(int)*data] == CCTL)
147 USTPUTC(CTLESC, p);
148 USTPUTC(*data++, p);
149 }
150 return (p);
151}
152#define STPUTS_QUOTES(data, syntax, p) p = stputs_quotes((data), syntax, p)
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153
154/*
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155 * Perform expansions on an argument, placing the resulting list of arguments
156 * in arglist. Parameter expansion, command substitution and arithmetic
157 * expansion are always performed; additional expansions can be requested
158 * via flag (EXP_*).
159 * The result is left in the stack string.
160 * When arglist is NULL, perform here document expansion.
161 *
162 * Caution: this function uses global state and is not reentrant.
163 * However, a new invocation after an interrupted invocation is safe
164 * and will reset the global state for the new call.
984263bc 165 */
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166void
167expandarg(union node *arg, struct arglist *arglist, int flag)
168{
169 struct strlist *sp;
170 char *p;
171
172 argbackq = arg->narg.backquote;
173 STARTSTACKSTR(expdest);
174 ifsfirst.next = NULL;
175 ifslastp = NULL;
176 argstr(arg->narg.text, flag);
177 if (arglist == NULL) {
97fe2313 178 STACKSTRNUL(expdest);
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179 return; /* here document expanded */
180 }
181 STPUTC('\0', expdest);
182 p = grabstackstr(expdest);
183 exparg.lastp = &exparg.list;
184 /*
185 * TODO - EXP_REDIR
186 */
187 if (flag & EXP_FULL) {
188 ifsbreakup(p, &exparg);
189 *exparg.lastp = NULL;
190 exparg.lastp = &exparg.list;
191 expandmeta(exparg.list, flag);
192 } else {
193 if (flag & EXP_REDIR) /*XXX - for now, just remove escapes */
194 rmescapes(p);
195 sp = (struct strlist *)stalloc(sizeof (struct strlist));
196 sp->text = p;
197 *exparg.lastp = sp;
198 exparg.lastp = &sp->next;
199 }
200 while (ifsfirst.next != NULL) {
201 struct ifsregion *ifsp;
202 INTOFF;
203 ifsp = ifsfirst.next->next;
204 ckfree(ifsfirst.next);
205 ifsfirst.next = ifsp;
206 INTON;
207 }
208 *exparg.lastp = NULL;
209 if (exparg.list) {
210 *arglist->lastp = exparg.list;
211 arglist->lastp = exparg.lastp;
212 }
213}
214
215
216
217/*
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218 * Perform parameter expansion, command substitution and arithmetic
219 * expansion, and tilde expansion if requested via EXP_TILDE/EXP_VARTILDE.
220 * Processing ends at a CTLENDVAR character as well as '\0'.
221 * This is used to expand word in ${var+word} etc.
222 * If EXP_FULL, EXP_CASE or EXP_REDIR are set, keep and/or generate CTLESC
223 * characters to allow for further processing.
224 * If EXP_FULL is set, also preserve CTLQUOTEMARK characters.
984263bc 225 */
99512ac4 226static void
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227argstr(char *p, int flag)
228{
229 char c;
230 int quotes = flag & (EXP_FULL | EXP_CASE | EXP_REDIR); /* do CTLESC */
231 int firsteq = 1;
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232 int split_lit;
233 int lit_quoted;
984263bc 234
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235 split_lit = flag & EXP_SPLIT_LIT;
236 lit_quoted = flag & EXP_LIT_QUOTED;
237 flag &= ~(EXP_SPLIT_LIT | EXP_LIT_QUOTED);
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238 if (*p == '~' && (flag & (EXP_TILDE | EXP_VARTILDE)))
239 p = exptilde(p, flag);
240 for (;;) {
99512ac4 241 CHECKSTRSPACE(2, expdest);
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242 switch (c = *p++) {
243 case '\0':
99512ac4 244 case CTLENDVAR:
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245 goto breakloop;
246 case CTLQUOTEMARK:
99512ac4 247 lit_quoted = 1;
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248 /* "$@" syntax adherence hack */
249 if (p[0] == CTLVAR && p[2] == '@' && p[3] == '=')
250 break;
251 if ((flag & EXP_FULL) != 0)
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252 USTPUTC(c, expdest);
253 break;
254 case CTLQUOTEEND:
255 lit_quoted = 0;
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256 break;
257 case CTLESC:
258 if (quotes)
99512ac4 259 USTPUTC(c, expdest);
984263bc 260 c = *p++;
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261 USTPUTC(c, expdest);
262 if (split_lit && !lit_quoted)
263 recordregion(expdest - stackblock() -
264 (quotes ? 2 : 1),
265 expdest - stackblock(), 0);
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266 break;
267 case CTLVAR:
268 p = evalvar(p, flag);
269 break;
270 case CTLBACKQ:
271 case CTLBACKQ|CTLQUOTE:
272 expbackq(argbackq->n, c & CTLQUOTE, flag);
273 argbackq = argbackq->next;
274 break;
275 case CTLENDARI:
276 expari(flag);
277 break;
278 case ':':
279 case '=':
280 /*
281 * sort of a hack - expand tildes in variable
282 * assignments (after the first '=' and after ':'s).
283 */
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284 USTPUTC(c, expdest);
285 if (split_lit && !lit_quoted)
286 recordregion(expdest - stackblock() - 1,
287 expdest - stackblock(), 0);
288 if (flag & EXP_VARTILDE && *p == '~' &&
289 (c != '=' || firsteq)) {
290 if (c == '=')
291 firsteq = 0;
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292 p = exptilde(p, flag);
293 }
294 break;
295 default:
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296 USTPUTC(c, expdest);
297 if (split_lit && !lit_quoted)
298 recordregion(expdest - stackblock() - 1,
299 expdest - stackblock(), 0);
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300 }
301 }
302breakloop:;
303}
304
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305/*
306 * Perform tilde expansion, placing the result in the stack string and
307 * returning the next position in the input string to process.
308 */
309static char *
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310exptilde(char *p, int flag)
311{
312 char c, *startp = p;
313 struct passwd *pw;
314 char *home;
315 int quotes = flag & (EXP_FULL | EXP_CASE | EXP_REDIR);
316
317 while ((c = *p) != '\0') {
318 switch(c) {
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319 case CTLESC: /* This means CTL* are always considered quoted. */
320 case CTLVAR:
321 case CTLBACKQ:
322 case CTLBACKQ | CTLQUOTE:
323 case CTLARI:
324 case CTLENDARI:
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325 case CTLQUOTEMARK:
326 return (startp);
327 case ':':
328 if (flag & EXP_VARTILDE)
329 goto done;
330 break;
331 case '/':
99512ac4 332 case CTLENDVAR:
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333 goto done;
334 }
335 p++;
336 }
337done:
338 *p = '\0';
339 if (*(startp+1) == '\0') {
340 if ((home = lookupvar("HOME")) == NULL)
341 goto lose;
342 } else {
343 if ((pw = getpwnam(startp+1)) == NULL)
344 goto lose;
345 home = pw->pw_dir;
346 }
347 if (*home == '\0')
348 goto lose;
349 *p = c;
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350 if (quotes)
351 STPUTS_QUOTES(home, SQSYNTAX, expdest);
352 else
353 STPUTS(home, expdest);
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354 return (p);
355lose:
356 *p = c;
357 return (startp);
358}
359
360
99512ac4 361static void
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362removerecordregions(int endoff)
363{
364 if (ifslastp == NULL)
365 return;
366
367 if (ifsfirst.endoff > endoff) {
368 while (ifsfirst.next != NULL) {
369 struct ifsregion *ifsp;
370 INTOFF;
371 ifsp = ifsfirst.next->next;
372 ckfree(ifsfirst.next);
373 ifsfirst.next = ifsp;
374 INTON;
375 }
376 if (ifsfirst.begoff > endoff)
377 ifslastp = NULL;
378 else {
379 ifslastp = &ifsfirst;
380 ifsfirst.endoff = endoff;
381 }
382 return;
383 }
af260b21 384
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385 ifslastp = &ifsfirst;
386 while (ifslastp->next && ifslastp->next->begoff < endoff)
387 ifslastp=ifslastp->next;
388 while (ifslastp->next != NULL) {
389 struct ifsregion *ifsp;
390 INTOFF;
391 ifsp = ifslastp->next->next;
392 ckfree(ifslastp->next);
393 ifslastp->next = ifsp;
394 INTON;
395 }
396 if (ifslastp->endoff > endoff)
397 ifslastp->endoff = endoff;
398}
399
400/*
401 * Expand arithmetic expression. Backup to start of expression,
402 * evaluate, place result in (backed up) result, adjust string position.
403 */
404void
405expari(int flag)
406{
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PA
407 char *p, *q, *start;
408 arith_t result;
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409 int begoff;
410 int quotes = flag & (EXP_FULL | EXP_CASE | EXP_REDIR);
411 int quoted;
412
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413 /*
414 * This routine is slightly over-complicated for
415 * efficiency. First we make sure there is
416 * enough space for the result, which may be bigger
99512ac4 417 * than the expression. Next we
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418 * scan backwards looking for the start of arithmetic. If the
419 * next previous character is a CTLESC character, then we
420 * have to rescan starting from the beginning since CTLESC
421 * characters have to be processed left to right.
422 */
99512ac4 423 CHECKSTRSPACE(DIGITS(result) - 2, expdest);
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424 USTPUTC('\0', expdest);
425 start = stackblock();
426 p = expdest - 2;
427 while (p >= start && *p != CTLARI)
428 --p;
429 if (p < start || *p != CTLARI)
430 error("missing CTLARI (shouldn't happen)");
431 if (p > start && *(p - 1) == CTLESC)
432 for (p = start; *p != CTLARI; p++)
433 if (*p == CTLESC)
434 p++;
435
436 if (p[1] == '"')
437 quoted=1;
438 else
439 quoted=0;
440 begoff = p - start;
441 removerecordregions(begoff);
442 if (quotes)
443 rmescapes(p+2);
99512ac4 444 q = grabstackstr(expdest);
984263bc 445 result = arith(p+2);
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446 ungrabstackstr(q, expdest);
447 fmtstr(p, DIGITS(result), ARITH_FORMAT_STR, result);
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448 while (*p++)
449 ;
450 if (quoted == 0)
451 recordregion(begoff, p - 1 - start, 0);
452 result = expdest - p + 1;
453 STADJUST(-result, expdest);
454}
455
456
457/*
99512ac4 458 * Perform command substitution.
984263bc 459 */
99512ac4 460static void
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461expbackq(union node *cmd, int quoted, int flag)
462{
463 struct backcmd in;
464 int i;
465 char buf[128];
466 char *p;
467 char *dest = expdest;
468 struct ifsregion saveifs, *savelastp;
469 struct nodelist *saveargbackq;
470 char lastc;
471 int startloc = dest - stackblock();
472 char const *syntax = quoted? DQSYNTAX : BASESYNTAX;
984263bc 473 int quotes = flag & (EXP_FULL | EXP_CASE | EXP_REDIR);
5b762f1a 474 int nnl;
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475
476 INTOFF;
477 saveifs = ifsfirst;
478 savelastp = ifslastp;
479 saveargbackq = argbackq;
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480 p = grabstackstr(dest);
481 evalbackcmd(cmd, &in);
482 ungrabstackstr(p, dest);
483 ifsfirst = saveifs;
484 ifslastp = savelastp;
485 argbackq = saveargbackq;
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486
487 p = in.buf;
488 lastc = '\0';
5b762f1a
SS
489 nnl = 0;
490 /* Don't copy trailing newlines */
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491 for (;;) {
492 if (--in.nleft < 0) {
493 if (in.fd < 0)
494 break;
495 while ((i = read(in.fd, buf, sizeof buf)) < 0 && errno == EINTR);
496 TRACE(("expbackq: read returns %d\n", i));
497 if (i <= 0)
498 break;
499 p = buf;
500 in.nleft = i - 1;
501 }
502 lastc = *p++;
503 if (lastc != '\0') {
5b762f1a
SS
504 if (lastc == '\n') {
505 nnl++;
506 } else {
99512ac4 507 CHECKSTRSPACE(nnl + 2, dest);
5b762f1a
SS
508 while (nnl > 0) {
509 nnl--;
99512ac4 510 USTPUTC('\n', dest);
5b762f1a 511 }
99512ac4
PA
512 if (quotes && syntax[(int)lastc] == CCTL)
513 USTPUTC(CTLESC, dest);
514 USTPUTC(lastc, dest);
5b762f1a 515 }
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516 }
517 }
518
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519 if (in.fd >= 0)
520 close(in.fd);
521 if (in.buf)
522 ckfree(in.buf);
523 if (in.jp)
2038fb68 524 exitstatus = waitforjob(in.jp, NULL);
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525 if (quoted == 0)
526 recordregion(startloc, dest - stackblock(), 0);
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527 TRACE(("expbackq: size=%td: \"%.*s\"\n",
528 ((dest - stackblock()) - startloc),
529 (int)((dest - stackblock()) - startloc),
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530 stackblock() + startloc));
531 expdest = dest;
532 INTON;
533}
534
535
536
99512ac4 537static int
984263bc 538subevalvar(char *p, char *str, int strloc, int subtype, int startloc,
99512ac4 539 int varflags, int quotes)
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540{
541 char *startp;
542 char *loc = NULL;
543 char *q;
544 int c = 0;
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MD
545 struct nodelist *saveargbackq = argbackq;
546 int amount;
547
99512ac4
PA
548 argstr(p, (subtype == VSTRIMLEFT || subtype == VSTRIMLEFTMAX ||
549 subtype == VSTRIMRIGHT || subtype == VSTRIMRIGHTMAX ?
550 EXP_CASE : 0) | EXP_TILDE);
984263bc 551 STACKSTRNUL(expdest);
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552 argbackq = saveargbackq;
553 startp = stackblock() + startloc;
554 if (str == NULL)
555 str = stackblock() + strloc;
556
557 switch (subtype) {
558 case VSASSIGN:
559 setvar(str, startp, 0);
560 amount = startp - expdest;
561 STADJUST(amount, expdest);
562 varflags &= ~VSNUL;
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563 return 1;
564
565 case VSQUESTION:
566 if (*p != CTLENDVAR) {
99512ac4 567 outfmt(out2, "%s\n", startp);
2038fb68 568 error(NULL);
984263bc 569 }
af260b21 570 error("%.*s: parameter %snot set", (int)(p - str - 1),
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571 str, (varflags & VSNUL) ? "null or "
572 : nullstr);
573 return 0;
574
575 case VSTRIMLEFT:
576 for (loc = startp; loc < str; loc++) {
577 c = *loc;
578 *loc = '\0';
99512ac4 579 if (patmatch(str, startp, quotes)) {
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580 *loc = c;
581 goto recordleft;
582 }
583 *loc = c;
99512ac4 584 if (quotes && *loc == CTLESC)
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585 loc++;
586 }
587 return 0;
588
589 case VSTRIMLEFTMAX:
590 for (loc = str - 1; loc >= startp;) {
591 c = *loc;
592 *loc = '\0';
99512ac4 593 if (patmatch(str, startp, quotes)) {
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594 *loc = c;
595 goto recordleft;
596 }
597 *loc = c;
598 loc--;
99512ac4 599 if (quotes && loc > startp && *(loc - 1) == CTLESC) {
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600 for (q = startp; q < loc; q++)
601 if (*q == CTLESC)
602 q++;
603 if (q > loc)
604 loc--;
605 }
606 }
607 return 0;
608
609 case VSTRIMRIGHT:
610 for (loc = str - 1; loc >= startp;) {
99512ac4 611 if (patmatch(str, loc, quotes)) {
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612 amount = loc - expdest;
613 STADJUST(amount, expdest);
614 return 1;
615 }
616 loc--;
99512ac4 617 if (quotes && loc > startp && *(loc - 1) == CTLESC) {
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618 for (q = startp; q < loc; q++)
619 if (*q == CTLESC)
620 q++;
621 if (q > loc)
622 loc--;
623 }
624 }
625 return 0;
626
627 case VSTRIMRIGHTMAX:
628 for (loc = startp; loc < str - 1; loc++) {
99512ac4 629 if (patmatch(str, loc, quotes)) {
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630 amount = loc - expdest;
631 STADJUST(amount, expdest);
632 return 1;
633 }
99512ac4 634 if (quotes && *loc == CTLESC)
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635 loc++;
636 }
637 return 0;
638
639
640 default:
641 abort();
642 }
643
644recordleft:
645 amount = ((str - 1) - (loc - startp)) - expdest;
646 STADJUST(amount, expdest);
647 while (loc != str - 1)
648 *startp++ = *loc++;
649 return 1;
650}
651
652
653/*
654 * Expand a variable, and return a pointer to the next character in the
655 * input string.
656 */
657
99512ac4 658static char *
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659evalvar(char *p, int flag)
660{
661 int subtype;
662 int varflags;
663 char *var;
664 char *val;
665 int patloc;
666 int c;
667 int set;
668 int special;
669 int startloc;
670 int varlen;
fd296645 671 int varlenb;
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MD
672 int easy;
673 int quotes = flag & (EXP_FULL | EXP_CASE | EXP_REDIR);
674
af260b21 675 varflags = (unsigned char)*p++;
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676 subtype = varflags & VSTYPE;
677 var = p;
678 special = 0;
679 if (! is_name(*p))
680 special = 1;
681 p = strchr(p, '=') + 1;
682again: /* jump here after setting a variable with ${var=text} */
e0752c76
SK
683 if (varflags & VSLINENO) {
684 set = 1;
685 special = 0;
686 val = var;
687 p[-1] = '\0'; /* temporarily overwrite '=' to have \0
688 terminated string */
689 } else if (special) {
984263bc
MD
690 set = varisset(var, varflags & VSNUL);
691 val = NULL;
692 } else {
693 val = bltinlookup(var, 1);
694 if (val == NULL || ((varflags & VSNUL) && val[0] == '\0')) {
695 val = NULL;
696 set = 0;
697 } else
698 set = 1;
699 }
700 varlen = 0;
701 startloc = expdest - stackblock();
99512ac4 702 if (!set && uflag && *var != '@' && *var != '*') {
984263bc
MD
703 switch (subtype) {
704 case VSNORMAL:
705 case VSTRIMLEFT:
706 case VSTRIMLEFTMAX:
707 case VSTRIMRIGHT:
708 case VSTRIMRIGHTMAX:
709 case VSLENGTH:
af260b21
PA
710 error("%.*s: parameter not set", (int)(p - var - 1),
711 var);
984263bc
MD
712 }
713 }
714 if (set && subtype != VSPLUS) {
715 /* insert the value of the variable */
716 if (special) {
af260b21 717 varvalue(var, varflags & VSQUOTE, subtype, flag);
984263bc 718 if (subtype == VSLENGTH) {
fd296645
PA
719 varlenb = expdest - stackblock() - startloc;
720 varlen = varlenb;
721 if (localeisutf8) {
722 val = stackblock() + startloc;
723 for (;val != expdest; val++)
724 if ((*val & 0xC0) == 0x80)
725 varlen--;
726 }
727 STADJUST(-varlenb, expdest);
984263bc
MD
728 }
729 } else {
730 char const *syntax = (varflags & VSQUOTE) ? DQSYNTAX
731 : BASESYNTAX;
732
733 if (subtype == VSLENGTH) {
734 for (;*val; val++)
fd296645
PA
735 if (!localeisutf8 ||
736 (*val & 0xC0) != 0x80)
737 varlen++;
984263bc
MD
738 }
739 else {
99512ac4
PA
740 if (quotes)
741 STPUTS_QUOTES(val, syntax, expdest);
742 else
743 STPUTS(val, expdest);
984263bc
MD
744
745 }
746 }
747 }
748
749 if (subtype == VSPLUS)
750 set = ! set;
751
752 easy = ((varflags & VSQUOTE) == 0 ||
753 (*var == '@' && shellparam.nparam != 1));
754
755
756 switch (subtype) {
757 case VSLENGTH:
758 expdest = cvtnum(varlen, expdest);
759 goto record;
760
761 case VSNORMAL:
762 if (!easy)
763 break;
764record:
765 recordregion(startloc, expdest - stackblock(),
5b14c76d
PA
766 varflags & VSQUOTE || (ifsset() && ifsval()[0] == '\0' &&
767 (*var == '@' || *var == '*')));
984263bc
MD
768 break;
769
770 case VSPLUS:
771 case VSMINUS:
772 if (!set) {
99512ac4
PA
773 argstr(p, flag | (flag & EXP_FULL ? EXP_SPLIT_LIT : 0) |
774 (varflags & VSQUOTE ? EXP_LIT_QUOTED : 0));
984263bc
MD
775 break;
776 }
777 if (easy)
778 goto record;
779 break;
780
781 case VSTRIMLEFT:
782 case VSTRIMLEFTMAX:
783 case VSTRIMRIGHT:
784 case VSTRIMRIGHTMAX:
785 if (!set)
786 break;
787 /*
788 * Terminate the string and start recording the pattern
789 * right after it
790 */
791 STPUTC('\0', expdest);
792 patloc = expdest - stackblock();
793 if (subevalvar(p, NULL, patloc, subtype,
99512ac4 794 startloc, varflags, quotes) == 0) {
984263bc
MD
795 int amount = (expdest - stackblock() - patloc) + 1;
796 STADJUST(-amount, expdest);
797 }
798 /* Remove any recorded regions beyond start of variable */
799 removerecordregions(startloc);
800 goto record;
801
802 case VSASSIGN:
803 case VSQUESTION:
804 if (!set) {
99512ac4
PA
805 if (subevalvar(p, var, 0, subtype, startloc, varflags,
806 quotes)) {
984263bc 807 varflags &= ~VSNUL;
af260b21
PA
808 /*
809 * Remove any recorded regions beyond
810 * start of variable
984263bc
MD
811 */
812 removerecordregions(startloc);
813 goto again;
814 }
815 break;
816 }
817 if (easy)
818 goto record;
819 break;
820
af260b21
PA
821 case VSERROR:
822 c = p - var - 1;
823 error("${%.*s%s}: Bad substitution", c, var,
824 (c > 0 && *p != CTLENDVAR) ? "..." : "");
825
984263bc
MD
826 default:
827 abort();
828 }
e0752c76 829 p[-1] = '='; /* recover overwritten '=' */
984263bc
MD
830
831 if (subtype != VSNORMAL) { /* skip to end of alternative */
832 int nesting = 1;
833 for (;;) {
834 if ((c = *p++) == CTLESC)
835 p++;
836 else if (c == CTLBACKQ || c == (CTLBACKQ|CTLQUOTE)) {
837 if (set)
838 argbackq = argbackq->next;
839 } else if (c == CTLVAR) {
840 if ((*p++ & VSTYPE) != VSNORMAL)
841 nesting++;
842 } else if (c == CTLENDVAR) {
843 if (--nesting == 0)
844 break;
845 }
846 }
847 }
848 return p;
849}
850
851
852
853/*
854 * Test whether a specialized variable is set.
855 */
856
99512ac4 857static int
984263bc
MD
858varisset(char *name, int nulok)
859{
860
861 if (*name == '!')
99512ac4 862 return backgndpidset();
984263bc
MD
863 else if (*name == '@' || *name == '*') {
864 if (*shellparam.p == NULL)
865 return 0;
866
867 if (nulok) {
868 char **av;
869
870 for (av = shellparam.p; *av; av++)
871 if (**av != '\0')
872 return 1;
873 return 0;
874 }
875 } else if (is_digit(*name)) {
876 char *ap;
877 int num = atoi(name);
878
879 if (num > shellparam.nparam)
880 return 0;
881
882 if (num == 0)
883 ap = arg0;
884 else
885 ap = shellparam.p[num - 1];
886
887 if (nulok && (ap == NULL || *ap == '\0'))
888 return 0;
889 }
890 return 1;
891}
892
99512ac4
PA
893static void
894strtodest(const char *p, int flag, int subtype, int quoted)
895{
896 if (flag & (EXP_FULL | EXP_CASE) && subtype != VSLENGTH)
897 STPUTS_QUOTES(p, quoted ? DQSYNTAX : BASESYNTAX, expdest);
898 else
899 STPUTS(p, expdest);
900}
984263bc
MD
901
902/*
903 * Add the value of a specialized variable to the stack string.
904 */
905
99512ac4 906static void
af260b21 907varvalue(char *name, int quoted, int subtype, int flag)
984263bc
MD
908{
909 int num;
910 char *p;
911 int i;
984263bc
MD
912 char sep;
913 char **ap;
984263bc
MD
914
915 switch (*name) {
916 case '$':
917 num = rootpid;
918 goto numvar;
919 case '?':
920 num = oexitstatus;
921 goto numvar;
922 case '#':
923 num = shellparam.nparam;
924 goto numvar;
925 case '!':
99512ac4 926 num = backgndpidval();
984263bc
MD
927numvar:
928 expdest = cvtnum(num, expdest);
929 break;
930 case '-':
931 for (i = 0 ; i < NOPTS ; i++) {
932 if (optlist[i].val)
933 STPUTC(optlist[i].letter, expdest);
934 }
935 break;
936 case '@':
af260b21 937 if (flag & EXP_FULL && quoted) {
984263bc 938 for (ap = shellparam.p ; (p = *ap++) != NULL ; ) {
99512ac4 939 strtodest(p, flag, subtype, quoted);
984263bc
MD
940 if (*ap)
941 STPUTC('\0', expdest);
942 }
943 break;
944 }
af260b21 945 /* FALLTHROUGH */
984263bc 946 case '*':
af260b21 947 if (ifsset())
984263bc
MD
948 sep = ifsval()[0];
949 else
950 sep = ' ';
951 for (ap = shellparam.p ; (p = *ap++) != NULL ; ) {
99512ac4 952 strtodest(p, flag, subtype, quoted);
5b14c76d
PA
953 if (!*ap)
954 break;
955 if (sep || (flag & EXP_FULL && !quoted && **ap != '\0'))
984263bc
MD
956 STPUTC(sep, expdest);
957 }
958 break;
959 case '0':
960 p = arg0;
99512ac4 961 strtodest(p, flag, subtype, quoted);
984263bc
MD
962 break;
963 default:
964 if (is_digit(*name)) {
965 num = atoi(name);
966 if (num > 0 && num <= shellparam.nparam) {
967 p = shellparam.p[num - 1];
99512ac4 968 strtodest(p, flag, subtype, quoted);
984263bc
MD
969 }
970 }
971 break;
972 }
973}
974
975
976
977/*
404d2224 978 * Record the fact that we have to scan this region of the
984263bc
MD
979 * string for IFS characters.
980 */
981
99512ac4
PA
982static void
983recordregion(int start, int end, int inquotes)
984263bc
MD
984{
985 struct ifsregion *ifsp;
986
987 if (ifslastp == NULL) {
988 ifsp = &ifsfirst;
989 } else {
99512ac4
PA
990 if (ifslastp->endoff == start
991 && ifslastp->inquotes == inquotes) {
992 /* extend previous area */
993 ifslastp->endoff = end;
994 return;
995 }
984263bc
MD
996 ifsp = (struct ifsregion *)ckmalloc(sizeof (struct ifsregion));
997 ifslastp->next = ifsp;
998 }
999 ifslastp = ifsp;
1000 ifslastp->next = NULL;
1001 ifslastp->begoff = start;
1002 ifslastp->endoff = end;
99512ac4 1003 ifslastp->inquotes = inquotes;
984263bc
MD
1004}
1005
1006
1007
1008/*
1009 * Break the argument string into pieces based upon IFS and add the
1010 * strings to the argument list. The regions of the string to be
1011 * searched for IFS characters have been stored by recordregion.
99512ac4
PA
1012 * CTLESC characters are preserved but have little effect in this pass
1013 * other than escaping CTL* characters. In particular, they do not escape
1014 * IFS characters: that should be done with the ifsregion mechanism.
1015 * CTLQUOTEMARK characters are used to preserve empty quoted strings.
1016 * This pass treats them as a regular character, making the string non-empty.
1017 * Later, they are removed along with the other CTL* characters.
984263bc 1018 */
99512ac4 1019static void
984263bc
MD
1020ifsbreakup(char *string, struct arglist *arglist)
1021{
1022 struct ifsregion *ifsp;
1023 struct strlist *sp;
1024 char *start;
1025 char *p;
1026 char *q;
492efe05 1027 const char *ifs;
99512ac4
PA
1028 const char *ifsspc;
1029 int had_param_ch = 0;
984263bc
MD
1030
1031 start = string;
99512ac4
PA
1032
1033 if (ifslastp == NULL) {
1034 /* Return entire argument, IFS doesn't apply to any of it */
1035 sp = (struct strlist *)stalloc(sizeof *sp);
1036 sp->text = start;
1037 *arglist->lastp = sp;
1038 arglist->lastp = &sp->next;
1039 return;
1040 }
1041
1042 ifs = ifsset() ? ifsval() : " \t\n";
1043
1044 for (ifsp = &ifsfirst; ifsp != NULL; ifsp = ifsp->next) {
1045 p = string + ifsp->begoff;
1046 while (p < string + ifsp->endoff) {
1047 q = p;
1048 if (*p == CTLESC)
1049 p++;
1050 if (ifsp->inquotes) {
1051 /* Only NULs (should be from "$@") end args */
1052 had_param_ch = 1;
1053 if (*p != 0) {
984263bc 1054 p++;
99512ac4
PA
1055 continue;
1056 }
1057 ifsspc = NULL;
1058 } else {
1059 if (!strchr(ifs, *p)) {
1060 had_param_ch = 1;
984263bc 1061 p++;
99512ac4
PA
1062 continue;
1063 }
1064 ifsspc = strchr(" \t\n", *p);
1065
1066 /* Ignore IFS whitespace at start */
1067 if (q == start && ifsspc != NULL) {
984263bc 1068 p++;
99512ac4
PA
1069 start = p;
1070 continue;
1071 }
1072 had_param_ch = 0;
984263bc 1073 }
99512ac4
PA
1074
1075 /* Save this argument... */
1076 *q = '\0';
984263bc
MD
1077 sp = (struct strlist *)stalloc(sizeof *sp);
1078 sp->text = start;
1079 *arglist->lastp = sp;
1080 arglist->lastp = &sp->next;
99512ac4
PA
1081 p++;
1082
1083 if (ifsspc != NULL) {
1084 /* Ignore further trailing IFS whitespace */
1085 for (; p < string + ifsp->endoff; p++) {
1086 q = p;
1087 if (*p == CTLESC)
1088 p++;
1089 if (strchr(ifs, *p) == NULL) {
1090 p = q;
1091 break;
1092 }
1093 if (strchr(" \t\n", *p) == NULL) {
1094 p++;
1095 break;
1096 }
1097 }
1098 }
1099 start = p;
984263bc 1100 }
99512ac4
PA
1101 }
1102
1103 /*
1104 * Save anything left as an argument.
1105 * Traditionally we have treated 'IFS=':'; set -- x$IFS' as
1106 * generating 2 arguments, the second of which is empty.
1107 * Some recent clarification of the Posix spec say that it
1108 * should only generate one....
1109 */
1110 if (had_param_ch || *start != 0) {
984263bc
MD
1111 sp = (struct strlist *)stalloc(sizeof *sp);
1112 sp->text = start;
1113 *arglist->lastp = sp;
1114 arglist->lastp = &sp->next;
1115 }
1116}
1117
1118
99512ac4
PA
1119static char expdir[PATH_MAX];
1120#define expdir_end (expdir + sizeof(expdir))
984263bc
MD
1121
1122/*
99512ac4
PA
1123 * Perform pathname generation and remove control characters.
1124 * At this point, the only control characters should be CTLESC and CTLQUOTEMARK.
1125 * The results are stored in the list exparg.
984263bc 1126 */
99512ac4 1127static void
984263bc
MD
1128expandmeta(struct strlist *str, int flag __unused)
1129{
1130 char *p;
1131 struct strlist **savelastp;
1132 struct strlist *sp;
1133 char c;
1134 /* TODO - EXP_REDIR */
1135
1136 while (str) {
1137 if (fflag)
1138 goto nometa;
1139 p = str->text;
1140 for (;;) { /* fast check for meta chars */
1141 if ((c = *p++) == '\0')
1142 goto nometa;
99512ac4 1143 if (c == '*' || c == '?' || c == '[')
984263bc
MD
1144 break;
1145 }
1146 savelastp = exparg.lastp;
1147 INTOFF;
984263bc 1148 expmeta(expdir, str->text);
984263bc
MD
1149 INTON;
1150 if (exparg.lastp == savelastp) {
1151 /*
1152 * no matches
1153 */
1154nometa:
1155 *exparg.lastp = str;
1156 rmescapes(str->text);
1157 exparg.lastp = &str->next;
1158 } else {
1159 *exparg.lastp = NULL;
1160 *savelastp = sp = expsort(*savelastp);
1161 while (sp->next != NULL)
1162 sp = sp->next;
1163 exparg.lastp = &sp->next;
1164 }
1165 str = str->next;
1166 }
1167}
1168
1169
1170/*
1171 * Do metacharacter (i.e. *, ?, [...]) expansion.
1172 */
1173
99512ac4 1174static void
984263bc
MD
1175expmeta(char *enddir, char *name)
1176{
1177 char *p;
99512ac4 1178 char *q;
984263bc
MD
1179 char *start;
1180 char *endname;
1181 int metaflag;
1182 struct stat statb;
1183 DIR *dirp;
1184 struct dirent *dp;
1185 int atend;
1186 int matchdot;
99512ac4 1187 int esc;
867f2c40 1188 int namlen;
984263bc
MD
1189
1190 metaflag = 0;
1191 start = name;
99512ac4 1192 for (p = name; esc = 0, *p; p += esc + 1) {
984263bc
MD
1193 if (*p == '*' || *p == '?')
1194 metaflag = 1;
1195 else if (*p == '[') {
1196 q = p + 1;
1197 if (*q == '!' || *q == '^')
1198 q++;
1199 for (;;) {
1200 while (*q == CTLQUOTEMARK)
1201 q++;
1202 if (*q == CTLESC)
1203 q++;
1204 if (*q == '/' || *q == '\0')
1205 break;
1206 if (*++q == ']') {
1207 metaflag = 1;
1208 break;
1209 }
1210 }
984263bc
MD
1211 } else if (*p == '\0')
1212 break;
1213 else if (*p == CTLQUOTEMARK)
1214 continue;
99512ac4
PA
1215 else {
1216 if (*p == CTLESC)
1217 esc++;
1218 if (p[esc] == '/') {
1219 if (metaflag)
1220 break;
1221 start = p + esc + 1;
1222 }
984263bc
MD
1223 }
1224 }
1225 if (metaflag == 0) { /* we've reached the end of the file name */
1226 if (enddir != expdir)
1227 metaflag++;
1228 for (p = name ; ; p++) {
1229 if (*p == CTLQUOTEMARK)
1230 continue;
1231 if (*p == CTLESC)
1232 p++;
1233 *enddir++ = *p;
1234 if (*p == '\0')
1235 break;
99512ac4
PA
1236 if (enddir == expdir_end)
1237 return;
984263bc 1238 }
85ef70cf 1239 if (metaflag == 0 || lstat(expdir, &statb) >= 0)
984263bc
MD
1240 addfname(expdir);
1241 return;
1242 }
1243 endname = p;
1244 if (start != name) {
1245 p = name;
1246 while (p < start) {
1247 while (*p == CTLQUOTEMARK)
1248 p++;
1249 if (*p == CTLESC)
1250 p++;
1251 *enddir++ = *p++;
99512ac4
PA
1252 if (enddir == expdir_end)
1253 return;
984263bc
MD
1254 }
1255 }
1256 if (enddir == expdir) {
99512ac4 1257 p = __DECONST(char *, ".");
984263bc 1258 } else if (enddir == expdir + 1 && *expdir == '/') {
99512ac4 1259 p = __DECONST(char *, "/");
984263bc 1260 } else {
99512ac4 1261 p = expdir;
984263bc
MD
1262 enddir[-1] = '\0';
1263 }
99512ac4 1264 if ((dirp = opendir(p)) == NULL)
984263bc
MD
1265 return;
1266 if (enddir != expdir)
1267 enddir[-1] = '/';
1268 if (*endname == 0) {
1269 atend = 1;
1270 } else {
1271 atend = 0;
99512ac4
PA
1272 *endname = '\0';
1273 endname += esc + 1;
984263bc
MD
1274 }
1275 matchdot = 0;
1276 p = start;
1277 while (*p == CTLQUOTEMARK)
1278 p++;
1279 if (*p == CTLESC)
1280 p++;
1281 if (*p == '.')
1282 matchdot++;
1283 while (! int_pending() && (dp = readdir(dirp)) != NULL) {
1284 if (dp->d_name[0] == '.' && ! matchdot)
1285 continue;
1286 if (patmatch(start, dp->d_name, 0)) {
867f2c40
PA
1287 namlen = dp->d_namlen;
1288 if (enddir + namlen + 1 > expdir_end)
99512ac4 1289 continue;
867f2c40 1290 memcpy(enddir, dp->d_name, namlen + 1);
99512ac4 1291 if (atend)
984263bc 1292 addfname(expdir);
99512ac4 1293 else {
867f2c40 1294 if (enddir + namlen + 2 > expdir_end)
984263bc 1295 continue;
867f2c40
PA
1296 enddir[namlen] = '/';
1297 enddir[namlen + 1] = '\0';
1298 expmeta(enddir + namlen + 1, endname);
984263bc
MD
1299 }
1300 }
1301 }
1302 closedir(dirp);
1303 if (! atend)
99512ac4 1304 endname[-esc - 1] = esc ? CTLESC : '/';
984263bc
MD
1305}
1306
1307
1308/*
1309 * Add a file name to the list.
1310 */
1311
99512ac4 1312static void
984263bc
MD
1313addfname(char *name)
1314{
1315 char *p;
1316 struct strlist *sp;
1317
1318 p = stalloc(strlen(name) + 1);
1319 scopy(name, p);
1320 sp = (struct strlist *)stalloc(sizeof *sp);
1321 sp->text = p;
1322 *exparg.lastp = sp;
1323 exparg.lastp = &sp->next;
1324}
1325
1326
1327/*
1328 * Sort the results of file name expansion. It calculates the number of
1329 * strings to sort and then calls msort (short for merge sort) to do the
1330 * work.
1331 */
1332
99512ac4 1333static struct strlist *
984263bc
MD
1334expsort(struct strlist *str)
1335{
1336 int len;
1337 struct strlist *sp;
1338
1339 len = 0;
1340 for (sp = str ; sp ; sp = sp->next)
1341 len++;
1342 return msort(str, len);
1343}
1344
1345
99512ac4 1346static struct strlist *
984263bc
MD
1347msort(struct strlist *list, int len)
1348{
1349 struct strlist *p, *q = NULL;
1350 struct strlist **lpp;
1351 int half;
1352 int n;
1353
1354 if (len <= 1)
1355 return list;
1356 half = len >> 1;
1357 p = list;
1358 for (n = half ; --n >= 0 ; ) {
1359 q = p;
1360 p = p->next;
1361 }
1362 q->next = NULL; /* terminate first half of list */
1363 q = msort(list, half); /* sort first half of list */
1364 p = msort(p, len - half); /* sort second half */
1365 lpp = &list;
1366 for (;;) {
1367 if (strcmp(p->text, q->text) < 0) {
1368 *lpp = p;
1369 lpp = &p->next;
1370 if ((p = *lpp) == NULL) {
1371 *lpp = q;
1372 break;
1373 }
1374 } else {
1375 *lpp = q;
1376 lpp = &q->next;
1377 if ((q = *lpp) == NULL) {
1378 *lpp = p;
1379 break;
1380 }
1381 }
1382 }
1383 return list;
1384}
1385
1386
1387
ead7935b
PA
1388static wchar_t
1389get_wc(const char **p)
1390{
1391 wchar_t c;
1392 int chrlen;
1393
1394 chrlen = mbtowc(&c, *p, 4);
1395 if (chrlen == 0)
1396 return 0;
1397 else if (chrlen == -1)
1398 c = 0;
1399 else
1400 *p += chrlen;
1401 return c;
1402}
1403
1404
215809b7
PA
1405/*
1406 * See if a character matches a character class, starting at the first colon
1407 * of "[:class:]".
1408 * If a valid character class is recognized, a pointer to the next character
1409 * after the final closing bracket is stored into *end, otherwise a null
1410 * pointer is stored into *end.
1411 */
1412static int
1413match_charclass(const char *p, wchar_t chr, const char **end)
1414{
1415 char name[20];
1416 const char *nameend;
1417 wctype_t cclass;
1418
1419 *end = NULL;
1420 p++;
1421 nameend = strstr(p, ":]");
1422 if (nameend == NULL || nameend - p >= (int)sizeof(name) || nameend == p)
1423 return 0;
1424 memcpy(name, p, nameend - p);
1425 name[nameend - p] = '\0';
1426 *end = nameend + 2;
1427 cclass = wctype(name);
1428 /* An unknown class matches nothing but is valid nevertheless. */
1429 if (cclass == 0)
1430 return 0;
1431 return iswctype(chr, cclass);
1432}
1433
1434
984263bc
MD
1435/*
1436 * Returns true if the pattern matches the string.
1437 */
1438
1439int
99512ac4 1440patmatch(const char *pattern, const char *string, int squoted)
984263bc 1441{
215809b7 1442 const char *p, *q, *end;
984263bc 1443 char c;
ead7935b 1444 wchar_t wc, wc2;
984263bc
MD
1445
1446 p = pattern;
1447 q = string;
1448 for (;;) {
1449 switch (c = *p++) {
1450 case '\0':
1451 goto breakloop;
1452 case CTLESC:
1453 if (squoted && *q == CTLESC)
1454 q++;
1455 if (*q++ != *p++)
1456 return 0;
1457 break;
1458 case CTLQUOTEMARK:
1459 continue;
1460 case '?':
1461 if (squoted && *q == CTLESC)
1462 q++;
ead7935b
PA
1463 if (localeisutf8)
1464 wc = get_wc(&q);
1465 else
1466 wc = (unsigned char)*q++;
1467 if (wc == '\0')
984263bc
MD
1468 return 0;
1469 break;
1470 case '*':
1471 c = *p;
1472 while (c == CTLQUOTEMARK || c == '*')
1473 c = *++p;
1474 if (c != CTLESC && c != CTLQUOTEMARK &&
1475 c != '?' && c != '*' && c != '[') {
1476 while (*q != c) {
1477 if (squoted && *q == CTLESC &&
1478 q[1] == c)
1479 break;
1480 if (*q == '\0')
1481 return 0;
1482 if (squoted && *q == CTLESC)
1483 q++;
1484 q++;
1485 }
1486 }
1487 do {
99512ac4 1488 if (patmatch(p, q, squoted))
984263bc
MD
1489 return 1;
1490 if (squoted && *q == CTLESC)
1491 q++;
1492 } while (*q++ != '\0');
1493 return 0;
1494 case '[': {
99512ac4 1495 const char *endp;
984263bc 1496 int invert, found;
ead7935b 1497 wchar_t chr;
984263bc
MD
1498
1499 endp = p;
1500 if (*endp == '!' || *endp == '^')
1501 endp++;
1502 for (;;) {
1503 while (*endp == CTLQUOTEMARK)
1504 endp++;
1505 if (*endp == '\0')
1506 goto dft; /* no matching ] */
1507 if (*endp == CTLESC)
1508 endp++;
1509 if (*++endp == ']')
1510 break;
1511 }
1512 invert = 0;
1513 if (*p == '!' || *p == '^') {
1514 invert++;
1515 p++;
1516 }
1517 found = 0;
ead7935b
PA
1518 if (squoted && *q == CTLESC)
1519 q++;
1520 if (localeisutf8)
1521 chr = get_wc(&q);
1522 else
1523 chr = (unsigned char)*q++;
984263bc
MD
1524 if (chr == '\0')
1525 return 0;
1526 c = *p++;
1527 do {
1528 if (c == CTLQUOTEMARK)
1529 continue;
215809b7
PA
1530 if (c == '[' && *p == ':') {
1531 found |= match_charclass(p, chr, &end);
1532 if (end != NULL)
1533 p = end;
1534 }
984263bc
MD
1535 if (c == CTLESC)
1536 c = *p++;
ead7935b
PA
1537 if (localeisutf8 && c & 0x80) {
1538 p--;
1539 wc = get_wc(&p);
1540 if (wc == 0) /* bad utf-8 */
1541 return 0;
1542 } else
1543 wc = (unsigned char)c;
984263bc
MD
1544 if (*p == '-' && p[1] != ']') {
1545 p++;
1546 while (*p == CTLQUOTEMARK)
1547 p++;
1548 if (*p == CTLESC)
1549 p++;
ead7935b
PA
1550 if (localeisutf8) {
1551 wc2 = get_wc(&p);
1552 if (wc2 == 0) /* bad utf-8 */
1553 return 0;
1554 } else
1555 wc2 = (unsigned char)*p++;
1556 if ( collate_range_cmp(chr, wc) >= 0
1557 && collate_range_cmp(chr, wc2) <= 0
984263bc
MD
1558 )
1559 found = 1;
984263bc 1560 } else {
ead7935b 1561 if (chr == wc)
984263bc
MD
1562 found = 1;
1563 }
1564 } while ((c = *p++) != ']');
1565 if (found == invert)
1566 return 0;
1567 break;
1568 }
1569dft: default:
1570 if (squoted && *q == CTLESC)
1571 q++;
1572 if (*q++ != c)
1573 return 0;
1574 break;
1575 }
1576 }
1577breakloop:
1578 if (*q != '\0')
1579 return 0;
1580 return 1;
1581}
1582
1583
1584
1585/*
99512ac4 1586 * Remove any CTLESC and CTLQUOTEMARK characters from a string.
984263bc
MD
1587 */
1588
1589void
1590rmescapes(char *str)
1591{
1592 char *p, *q;
1593
1594 p = str;
99512ac4 1595 while (*p != CTLESC && *p != CTLQUOTEMARK && *p != CTLQUOTEEND) {
984263bc
MD
1596 if (*p++ == '\0')
1597 return;
1598 }
1599 q = p;
1600 while (*p) {
99512ac4 1601 if (*p == CTLQUOTEMARK || *p == CTLQUOTEEND) {
984263bc
MD
1602 p++;
1603 continue;
1604 }
1605 if (*p == CTLESC)
1606 p++;
1607 *q++ = *p++;
1608 }
1609 *q = '\0';
1610}
1611
1612
1613
1614/*
1615 * See if a pattern matches in a case statement.
1616 */
1617
1618int
99512ac4 1619casematch(union node *pattern, const char *val)
984263bc
MD
1620{
1621 struct stackmark smark;
1622 int result;
1623 char *p;
1624
1625 setstackmark(&smark);
1626 argbackq = pattern->narg.backquote;
1627 STARTSTACKSTR(expdest);
1628 ifslastp = NULL;
1629 argstr(pattern->narg.text, EXP_TILDE | EXP_CASE);
1630 STPUTC('\0', expdest);
1631 p = grabstackstr(expdest);
1632 result = patmatch(p, val, 0);
1633 popstackmark(&smark);
1634 return result;
1635}
1636
1637/*
1638 * Our own itoa().
1639 */
1640
99512ac4 1641static char *
984263bc
MD
1642cvtnum(int num, char *buf)
1643{
1644 char temp[32];
1645 int neg = num < 0;
1646 char *p = temp + 31;
1647
1648 temp[31] = '\0';
1649
1650 do {
1651 *--p = num % 10 + '0';
1652 } while ((num /= 10) != 0);
1653
1654 if (neg)
1655 *--p = '-';
1656
99512ac4 1657 STPUTS(p, buf);
984263bc
MD
1658 return buf;
1659}
d13d0ee2
PA
1660
1661/*
1662 * Do most of the work for wordexp(3).
1663 */
1664
1665int
1666wordexpcmd(int argc, char **argv)
1667{
1668 size_t len;
1669 int i;
1670
1671 out1fmt("%08x", argc - 1);
1672 for (i = 1, len = 0; i < argc; i++)
1673 len += strlen(argv[i]);
1674 out1fmt("%08x", (int)len);
99512ac4
PA
1675 for (i = 1; i < argc; i++)
1676 outbin(argv[i], strlen(argv[i]) + 1, out1);
d13d0ee2
PA
1677 return (0);
1678}