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84ceda19 | 1 | /* |
2 | * Copyright (c) 1989, 1993 | |
3 | * The Regents of the University of California. All rights reserved. | |
4 | * | |
5 | * This code is derived from software contributed to Berkeley by | |
6 | * Guido van Rossum. | |
7 | * | |
8 | * Redistribution and use in source and binary forms, with or without | |
9 | * modification, are permitted provided that the following conditions | |
10 | * are met: | |
11 | * 1. Redistributions of source code must retain the above copyright | |
12 | * notice, this list of conditions and the following disclaimer. | |
13 | * 2. Redistributions in binary form must reproduce the above copyright | |
14 | * notice, this list of conditions and the following disclaimer in the | |
15 | * documentation and/or other materials provided with the distribution. | |
16 | * 3. All advertising materials mentioning features or use of this software | |
17 | * must display the following acknowledgement: | |
18 | * This product includes software developed by the University of | |
19 | * California, Berkeley and its contributors. | |
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. | |
23 | * | |
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 | |
34 | * SUCH DAMAGE. | |
35 | */ | |
36 | ||
37 | #include "includes.h" | |
38 | #include <ctype.h> | |
39 | ||
9887f269 | 40 | long |
41 | get_arg_max() | |
42 | { | |
43 | #ifdef ARG_MAX | |
44 | return(ARG_MAX); | |
45 | #elif defined(HAVE_SYSCONF) && defined(_SC_ARG_MAX) | |
46 | return(sysconf(_SC_ARG_MAX)); | |
47 | #else | |
48 | return(256); /* XXX: arbitrary */ | |
49 | #endif | |
50 | } | |
51 | ||
40849fdb | 52 | #if !defined(HAVE_GLOB) || !defined(GLOB_HAS_ALTDIRFUNC) || \ |
53 | !defined(GLOB_HAS_GL_MATCHC) | |
84ceda19 | 54 | |
55 | #if defined(LIBC_SCCS) && !defined(lint) | |
56 | #if 0 | |
57 | static char sccsid[] = "@(#)glob.c 8.3 (Berkeley) 10/13/93"; | |
58 | #else | |
8d0cc79b | 59 | static char rcsid[] = "$OpenBSD: glob.c,v 1.13 2001/03/28 08:00:00 deraadt Exp $"; |
84ceda19 | 60 | #endif |
61 | #endif /* LIBC_SCCS and not lint */ | |
62 | ||
63 | /* | |
64 | * glob(3) -- a superset of the one defined in POSIX 1003.2. | |
65 | * | |
66 | * The [!...] convention to negate a range is supported (SysV, Posix, ksh). | |
67 | * | |
68 | * Optional extra services, controlled by flags not defined by POSIX: | |
69 | * | |
70 | * GLOB_QUOTE: | |
71 | * Escaping convention: \ inhibits any special meaning the following | |
72 | * character might have (except \ at end of string is retained). | |
73 | * GLOB_MAGCHAR: | |
74 | * Set in gl_flags if pattern contained a globbing character. | |
75 | * GLOB_NOMAGIC: | |
76 | * Same as GLOB_NOCHECK, but it will only append pattern if it did | |
77 | * not contain any magic characters. [Used in csh style globbing] | |
78 | * GLOB_ALTDIRFUNC: | |
79 | * Use alternately specified directory access functions. | |
80 | * GLOB_TILDE: | |
81 | * expand ~user/foo to the /home/dir/of/user/foo | |
82 | * GLOB_BRACE: | |
83 | * expand {1,2}{a,b} to 1a 1b 2a 2b | |
84 | * gl_matchc: | |
85 | * Number of matches in the current invocation of glob. | |
86 | */ | |
87 | ||
88 | ||
89 | #define DOLLAR '$' | |
90 | #define DOT '.' | |
91 | #define EOS '\0' | |
92 | #define LBRACKET '[' | |
93 | #define NOT '!' | |
94 | #define QUESTION '?' | |
95 | #define QUOTE '\\' | |
96 | #define RANGE '-' | |
97 | #define RBRACKET ']' | |
98 | #define SEP '/' | |
99 | #define STAR '*' | |
100 | #define TILDE '~' | |
101 | #define UNDERSCORE '_' | |
102 | #define LBRACE '{' | |
103 | #define RBRACE '}' | |
104 | #define SLASH '/' | |
105 | #define COMMA ',' | |
106 | ||
107 | #ifndef DEBUG | |
108 | ||
109 | #define M_QUOTE 0x8000 | |
110 | #define M_PROTECT 0x4000 | |
111 | #define M_MASK 0xffff | |
112 | #define M_ASCII 0x00ff | |
113 | ||
114 | typedef u_short Char; | |
115 | ||
116 | #else | |
117 | ||
118 | #define M_QUOTE 0x80 | |
119 | #define M_PROTECT 0x40 | |
120 | #define M_MASK 0xff | |
121 | #define M_ASCII 0x7f | |
122 | ||
123 | typedef char Char; | |
124 | ||
125 | #endif | |
126 | ||
127 | ||
128 | #define CHAR(c) ((Char)((c)&M_ASCII)) | |
129 | #define META(c) ((Char)((c)|M_QUOTE)) | |
130 | #define M_ALL META('*') | |
131 | #define M_END META(']') | |
132 | #define M_NOT META('!') | |
133 | #define M_ONE META('?') | |
134 | #define M_RNG META('-') | |
135 | #define M_SET META('[') | |
136 | #define ismeta(c) (((c)&M_QUOTE) != 0) | |
137 | ||
138 | ||
139 | static int compare __P((const void *, const void *)); | |
8d0cc79b | 140 | static int g_Ctoc __P((const Char *, char *, char *)); |
84ceda19 | 141 | static int g_lstat __P((Char *, struct stat *, glob_t *)); |
142 | static DIR *g_opendir __P((Char *, glob_t *)); | |
143 | static Char *g_strchr __P((Char *, int)); | |
84ceda19 | 144 | static int g_stat __P((Char *, struct stat *, glob_t *)); |
145 | static int glob0 __P((const Char *, glob_t *)); | |
8d539493 | 146 | static int glob1 __P((Char *, glob_t *, size_t *)); |
147 | static int glob2 __P((Char *, Char *, Char *, glob_t *, size_t *)); | |
148 | static int glob3 __P((Char *, Char *, Char *, Char *, glob_t *, | |
149 | size_t *)); | |
150 | static int globextend __P((const Char *, glob_t *, size_t *)); | |
151 | static const Char * | |
152 | globtilde __P((const Char *, Char *, size_t, glob_t *)); | |
84ceda19 | 153 | static int globexp1 __P((const Char *, glob_t *)); |
154 | static int globexp2 __P((const Char *, const Char *, glob_t *, int *)); | |
155 | static int match __P((Char *, Char *, Char *)); | |
156 | #ifdef DEBUG | |
157 | static void qprintf __P((const char *, Char *)); | |
158 | #endif | |
159 | ||
160 | int | |
161 | glob(pattern, flags, errfunc, pglob) | |
162 | const char *pattern; | |
163 | int flags, (*errfunc) __P((const char *, int)); | |
164 | glob_t *pglob; | |
165 | { | |
166 | const u_char *patnext; | |
167 | int c; | |
168 | Char *bufnext, *bufend, patbuf[MAXPATHLEN+1]; | |
169 | ||
170 | patnext = (u_char *) pattern; | |
171 | if (!(flags & GLOB_APPEND)) { | |
172 | pglob->gl_pathc = 0; | |
173 | pglob->gl_pathv = NULL; | |
174 | if (!(flags & GLOB_DOOFFS)) | |
175 | pglob->gl_offs = 0; | |
176 | } | |
177 | pglob->gl_flags = flags & ~GLOB_MAGCHAR; | |
178 | pglob->gl_errfunc = errfunc; | |
179 | pglob->gl_matchc = 0; | |
180 | ||
181 | bufnext = patbuf; | |
182 | bufend = bufnext + MAXPATHLEN; | |
183 | if (flags & GLOB_NOESCAPE) | |
8d0cc79b | 184 | while (bufnext < bufend && (c = *patnext++) != EOS) |
185 | *bufnext++ = c; | |
84ceda19 | 186 | else { |
187 | /* Protect the quoted characters. */ | |
188 | while (bufnext < bufend && (c = *patnext++) != EOS) | |
189 | if (c == QUOTE) { | |
190 | if ((c = *patnext++) == EOS) { | |
191 | c = QUOTE; | |
192 | --patnext; | |
193 | } | |
194 | *bufnext++ = c | M_PROTECT; | |
195 | } | |
196 | else | |
197 | *bufnext++ = c; | |
198 | } | |
199 | *bufnext = EOS; | |
200 | ||
201 | if (flags & GLOB_BRACE) | |
202 | return globexp1(patbuf, pglob); | |
203 | else | |
204 | return glob0(patbuf, pglob); | |
205 | } | |
206 | ||
207 | /* | |
208 | * Expand recursively a glob {} pattern. When there is no more expansion | |
209 | * invoke the standard globbing routine to glob the rest of the magic | |
210 | * characters | |
211 | */ | |
212 | static int globexp1(pattern, pglob) | |
213 | const Char *pattern; | |
214 | glob_t *pglob; | |
215 | { | |
216 | const Char* ptr = pattern; | |
217 | int rv; | |
218 | ||
219 | /* Protect a single {}, for find(1), like csh */ | |
220 | if (pattern[0] == LBRACE && pattern[1] == RBRACE && pattern[2] == EOS) | |
221 | return glob0(pattern, pglob); | |
222 | ||
223 | while ((ptr = (const Char *) g_strchr((Char *) ptr, LBRACE)) != NULL) | |
224 | if (!globexp2(ptr, pattern, pglob, &rv)) | |
225 | return rv; | |
226 | ||
227 | return glob0(pattern, pglob); | |
228 | } | |
229 | ||
230 | ||
231 | /* | |
232 | * Recursive brace globbing helper. Tries to expand a single brace. | |
233 | * If it succeeds then it invokes globexp1 with the new pattern. | |
234 | * If it fails then it tries to glob the rest of the pattern and returns. | |
235 | */ | |
236 | static int globexp2(ptr, pattern, pglob, rv) | |
237 | const Char *ptr, *pattern; | |
238 | glob_t *pglob; | |
239 | int *rv; | |
240 | { | |
241 | int i; | |
242 | Char *lm, *ls; | |
243 | const Char *pe, *pm, *pl; | |
244 | Char patbuf[MAXPATHLEN + 1]; | |
245 | ||
246 | /* copy part up to the brace */ | |
247 | for (lm = patbuf, pm = pattern; pm != ptr; *lm++ = *pm++) | |
248 | continue; | |
249 | ls = lm; | |
250 | ||
251 | /* Find the balanced brace */ | |
252 | for (i = 0, pe = ++ptr; *pe; pe++) | |
253 | if (*pe == LBRACKET) { | |
254 | /* Ignore everything between [] */ | |
255 | for (pm = pe++; *pe != RBRACKET && *pe != EOS; pe++) | |
256 | continue; | |
257 | if (*pe == EOS) { | |
258 | /* | |
259 | * We could not find a matching RBRACKET. | |
260 | * Ignore and just look for RBRACE | |
261 | */ | |
262 | pe = pm; | |
263 | } | |
264 | } | |
265 | else if (*pe == LBRACE) | |
266 | i++; | |
267 | else if (*pe == RBRACE) { | |
268 | if (i == 0) | |
269 | break; | |
270 | i--; | |
271 | } | |
272 | ||
273 | /* Non matching braces; just glob the pattern */ | |
274 | if (i != 0 || *pe == EOS) { | |
275 | *rv = glob0(patbuf, pglob); | |
276 | return 0; | |
277 | } | |
278 | ||
8d0cc79b | 279 | for (i = 0, pl = pm = ptr; pm <= pe; pm++) { |
84ceda19 | 280 | switch (*pm) { |
281 | case LBRACKET: | |
282 | /* Ignore everything between [] */ | |
283 | for (pl = pm++; *pm != RBRACKET && *pm != EOS; pm++) | |
284 | continue; | |
285 | if (*pm == EOS) { | |
286 | /* | |
287 | * We could not find a matching RBRACKET. | |
288 | * Ignore and just look for RBRACE | |
289 | */ | |
290 | pm = pl; | |
291 | } | |
292 | break; | |
293 | ||
294 | case LBRACE: | |
295 | i++; | |
296 | break; | |
297 | ||
298 | case RBRACE: | |
299 | if (i) { | |
8d0cc79b | 300 | i--; |
301 | break; | |
84ceda19 | 302 | } |
303 | /* FALLTHROUGH */ | |
304 | case COMMA: | |
305 | if (i && *pm == COMMA) | |
306 | break; | |
307 | else { | |
308 | /* Append the current string */ | |
309 | for (lm = ls; (pl < pm); *lm++ = *pl++) | |
310 | continue; | |
311 | /* | |
312 | * Append the rest of the pattern after the | |
313 | * closing brace | |
314 | */ | |
315 | for (pl = pe + 1; (*lm++ = *pl++) != EOS;) | |
316 | continue; | |
317 | ||
318 | /* Expand the current pattern */ | |
319 | #ifdef DEBUG | |
320 | qprintf("globexp2:", patbuf); | |
321 | #endif | |
322 | *rv = globexp1(patbuf, pglob); | |
323 | ||
324 | /* move after the comma, to the next string */ | |
325 | pl = pm + 1; | |
326 | } | |
327 | break; | |
328 | ||
329 | default: | |
330 | break; | |
331 | } | |
8d0cc79b | 332 | } |
84ceda19 | 333 | *rv = 0; |
334 | return 0; | |
335 | } | |
336 | ||
337 | ||
338 | ||
339 | /* | |
340 | * expand tilde from the passwd file. | |
341 | */ | |
342 | static const Char * | |
343 | globtilde(pattern, patbuf, patbuf_len, pglob) | |
344 | const Char *pattern; | |
345 | Char *patbuf; | |
346 | size_t patbuf_len; | |
347 | glob_t *pglob; | |
348 | { | |
349 | struct passwd *pwd; | |
350 | char *h; | |
351 | const Char *p; | |
352 | Char *b, *eb; | |
353 | ||
354 | if (*pattern != TILDE || !(pglob->gl_flags & GLOB_TILDE)) | |
355 | return pattern; | |
356 | ||
357 | /* Copy up to the end of the string or / */ | |
358 | eb = &patbuf[patbuf_len - 1]; | |
359 | for (p = pattern + 1, h = (char *) patbuf; | |
360 | h < (char *)eb && *p && *p != SLASH; *h++ = *p++) | |
361 | continue; | |
362 | ||
363 | *h = EOS; | |
364 | ||
365 | if (((char *) patbuf)[0] == EOS) { | |
366 | /* | |
367 | * handle a plain ~ or ~/ by expanding $HOME | |
368 | * first and then trying the password file | |
369 | */ | |
370 | #if 0 | |
371 | if (issetugid() != 0 || (h = getenv("HOME")) == NULL) { | |
372 | #endif | |
373 | if ((getuid() != geteuid()) || (h = getenv("HOME")) == NULL) { | |
374 | if ((pwd = getpwuid(getuid())) == NULL) | |
375 | return pattern; | |
376 | else | |
377 | h = pwd->pw_dir; | |
378 | } | |
379 | } | |
380 | else { | |
381 | /* | |
382 | * Expand a ~user | |
383 | */ | |
384 | if ((pwd = getpwnam((char*) patbuf)) == NULL) | |
385 | return pattern; | |
386 | else | |
387 | h = pwd->pw_dir; | |
388 | } | |
389 | ||
390 | /* Copy the home directory */ | |
391 | for (b = patbuf; b < eb && *h; *b++ = *h++) | |
392 | continue; | |
393 | ||
394 | /* Append the rest of the pattern */ | |
395 | while (b < eb && (*b++ = *p++) != EOS) | |
396 | continue; | |
397 | *b = EOS; | |
398 | ||
399 | return patbuf; | |
400 | } | |
401 | ||
402 | ||
403 | /* | |
404 | * The main glob() routine: compiles the pattern (optionally processing | |
405 | * quotes), calls glob1() to do the real pattern matching, and finally | |
406 | * sorts the list (unless unsorted operation is requested). Returns 0 | |
407 | * if things went well, nonzero if errors occurred. It is not an error | |
408 | * to find no matches. | |
409 | */ | |
410 | static int | |
411 | glob0(pattern, pglob) | |
412 | const Char *pattern; | |
413 | glob_t *pglob; | |
414 | { | |
415 | const Char *qpatnext; | |
416 | int c, err, oldpathc; | |
417 | Char *bufnext, patbuf[MAXPATHLEN+1]; | |
8d539493 | 418 | size_t limit = 0; |
84ceda19 | 419 | |
420 | qpatnext = globtilde(pattern, patbuf, sizeof(patbuf) / sizeof(Char), | |
421 | pglob); | |
422 | oldpathc = pglob->gl_pathc; | |
423 | bufnext = patbuf; | |
424 | ||
425 | /* We don't need to check for buffer overflow any more. */ | |
426 | while ((c = *qpatnext++) != EOS) { | |
427 | switch (c) { | |
428 | case LBRACKET: | |
429 | c = *qpatnext; | |
430 | if (c == NOT) | |
431 | ++qpatnext; | |
432 | if (*qpatnext == EOS || | |
433 | g_strchr((Char *) qpatnext+1, RBRACKET) == NULL) { | |
434 | *bufnext++ = LBRACKET; | |
435 | if (c == NOT) | |
436 | --qpatnext; | |
437 | break; | |
438 | } | |
439 | *bufnext++ = M_SET; | |
440 | if (c == NOT) | |
441 | *bufnext++ = M_NOT; | |
442 | c = *qpatnext++; | |
443 | do { | |
444 | *bufnext++ = CHAR(c); | |
445 | if (*qpatnext == RANGE && | |
446 | (c = qpatnext[1]) != RBRACKET) { | |
447 | *bufnext++ = M_RNG; | |
448 | *bufnext++ = CHAR(c); | |
449 | qpatnext += 2; | |
450 | } | |
451 | } while ((c = *qpatnext++) != RBRACKET); | |
452 | pglob->gl_flags |= GLOB_MAGCHAR; | |
453 | *bufnext++ = M_END; | |
454 | break; | |
455 | case QUESTION: | |
456 | pglob->gl_flags |= GLOB_MAGCHAR; | |
457 | *bufnext++ = M_ONE; | |
458 | break; | |
459 | case STAR: | |
460 | pglob->gl_flags |= GLOB_MAGCHAR; | |
461 | /* collapse adjacent stars to one, | |
462 | * to avoid exponential behavior | |
463 | */ | |
464 | if (bufnext == patbuf || bufnext[-1] != M_ALL) | |
8d0cc79b | 465 | *bufnext++ = M_ALL; |
84ceda19 | 466 | break; |
467 | default: | |
468 | *bufnext++ = CHAR(c); | |
469 | break; | |
470 | } | |
471 | } | |
472 | *bufnext = EOS; | |
473 | #ifdef DEBUG | |
474 | qprintf("glob0:", patbuf); | |
475 | #endif | |
476 | ||
8d539493 | 477 | if ((err = glob1(patbuf, pglob, &limit)) != 0) |
84ceda19 | 478 | return(err); |
479 | ||
480 | /* | |
481 | * If there was no match we are going to append the pattern | |
482 | * if GLOB_NOCHECK was specified or if GLOB_NOMAGIC was specified | |
483 | * and the pattern did not contain any magic characters | |
484 | * GLOB_NOMAGIC is there just for compatibility with csh. | |
485 | */ | |
486 | if (pglob->gl_pathc == oldpathc) { | |
487 | if ((pglob->gl_flags & GLOB_NOCHECK) || | |
488 | ((pglob->gl_flags & GLOB_NOMAGIC) && | |
489 | !(pglob->gl_flags & GLOB_MAGCHAR))) | |
8d539493 | 490 | return(globextend(pattern, pglob, &limit)); |
84ceda19 | 491 | else |
492 | return(GLOB_NOMATCH); | |
493 | } | |
494 | if (!(pglob->gl_flags & GLOB_NOSORT)) | |
495 | qsort(pglob->gl_pathv + pglob->gl_offs + oldpathc, | |
496 | pglob->gl_pathc - oldpathc, sizeof(char *), compare); | |
497 | return(0); | |
498 | } | |
499 | ||
500 | static int | |
501 | compare(p, q) | |
502 | const void *p, *q; | |
503 | { | |
504 | return(strcmp(*(char **)p, *(char **)q)); | |
505 | } | |
506 | ||
507 | static int | |
8d539493 | 508 | glob1(pattern, pglob, limitp) |
84ceda19 | 509 | Char *pattern; |
510 | glob_t *pglob; | |
8d539493 | 511 | size_t *limitp; |
84ceda19 | 512 | { |
513 | Char pathbuf[MAXPATHLEN+1]; | |
514 | ||
515 | /* A null pathname is invalid -- POSIX 1003.1 sect. 2.4. */ | |
516 | if (*pattern == EOS) | |
517 | return(0); | |
8d539493 | 518 | return(glob2(pathbuf, pathbuf, pattern, pglob, limitp)); |
84ceda19 | 519 | } |
520 | ||
521 | /* | |
522 | * The functions glob2 and glob3 are mutually recursive; there is one level | |
523 | * of recursion for each segment in the pattern that contains one or more | |
524 | * meta characters. | |
525 | */ | |
526 | static int | |
8d539493 | 527 | glob2(pathbuf, pathend, pattern, pglob, limitp) |
84ceda19 | 528 | Char *pathbuf, *pathend, *pattern; |
529 | glob_t *pglob; | |
8d539493 | 530 | size_t *limitp; |
84ceda19 | 531 | { |
532 | struct stat sb; | |
533 | Char *p, *q; | |
534 | int anymeta; | |
535 | ||
536 | /* | |
537 | * Loop over pattern segments until end of pattern or until | |
538 | * segment with meta character found. | |
539 | */ | |
540 | for (anymeta = 0;;) { | |
541 | if (*pattern == EOS) { /* End of pattern? */ | |
542 | *pathend = EOS; | |
543 | if (g_lstat(pathbuf, &sb, pglob)) | |
544 | return(0); | |
545 | ||
546 | if (((pglob->gl_flags & GLOB_MARK) && | |
8d0cc79b | 547 | pathend[-1] != SEP) && (S_ISDIR(sb.st_mode) || |
548 | (S_ISLNK(sb.st_mode) && | |
84ceda19 | 549 | (g_stat(pathbuf, &sb, pglob) == 0) && |
550 | S_ISDIR(sb.st_mode)))) { | |
551 | *pathend++ = SEP; | |
552 | *pathend = EOS; | |
553 | } | |
554 | ++pglob->gl_matchc; | |
8d539493 | 555 | return(globextend(pathbuf, pglob, limitp)); |
84ceda19 | 556 | } |
557 | ||
558 | /* Find end of next segment, copy tentatively to pathend. */ | |
559 | q = pathend; | |
560 | p = pattern; | |
561 | while (*p != EOS && *p != SEP) { | |
562 | if (ismeta(*p)) | |
563 | anymeta = 1; | |
564 | *q++ = *p++; | |
565 | } | |
566 | ||
567 | if (!anymeta) { /* No expansion, do next segment. */ | |
568 | pathend = q; | |
569 | pattern = p; | |
570 | while (*pattern == SEP) | |
571 | *pathend++ = *pattern++; | |
8d0cc79b | 572 | } else |
573 | /* Need expansion, recurse. */ | |
8d539493 | 574 | return(glob3(pathbuf, pathend, pattern, p, pglob, |
575 | limitp)); | |
84ceda19 | 576 | } |
577 | /* NOTREACHED */ | |
578 | } | |
579 | ||
580 | static int | |
8d539493 | 581 | glob3(pathbuf, pathend, pattern, restpattern, pglob, limitp) |
84ceda19 | 582 | Char *pathbuf, *pathend, *pattern, *restpattern; |
583 | glob_t *pglob; | |
8d539493 | 584 | size_t *limitp; |
84ceda19 | 585 | { |
586 | register struct dirent *dp; | |
587 | DIR *dirp; | |
588 | int err; | |
589 | char buf[MAXPATHLEN]; | |
590 | ||
591 | /* | |
592 | * The readdirfunc declaration can't be prototyped, because it is | |
593 | * assigned, below, to two functions which are prototyped in glob.h | |
594 | * and dirent.h as taking pointers to differently typed opaque | |
595 | * structures. | |
596 | */ | |
597 | struct dirent *(*readdirfunc)(); | |
598 | ||
599 | *pathend = EOS; | |
600 | errno = 0; | |
601 | ||
602 | if ((dirp = g_opendir(pathbuf, pglob)) == NULL) { | |
603 | /* TODO: don't call for ENOENT or ENOTDIR? */ | |
604 | if (pglob->gl_errfunc) { | |
8d0cc79b | 605 | if (g_Ctoc(pathbuf, buf, buf+sizeof(buf))) |
606 | return(GLOB_ABORTED); | |
84ceda19 | 607 | if (pglob->gl_errfunc(buf, errno) || |
608 | pglob->gl_flags & GLOB_ERR) | |
8d0cc79b | 609 | return(GLOB_ABORTED); |
84ceda19 | 610 | } |
611 | return(0); | |
612 | } | |
613 | ||
614 | err = 0; | |
615 | ||
616 | /* Search directory for matching names. */ | |
617 | if (pglob->gl_flags & GLOB_ALTDIRFUNC) | |
618 | readdirfunc = pglob->gl_readdir; | |
619 | else | |
620 | readdirfunc = readdir; | |
621 | while ((dp = (*readdirfunc)(dirp))) { | |
622 | register u_char *sc; | |
623 | register Char *dc; | |
624 | ||
625 | /* Initial DOT must be matched literally. */ | |
626 | if (dp->d_name[0] == DOT && *pattern != DOT) | |
627 | continue; | |
628 | for (sc = (u_char *) dp->d_name, dc = pathend; | |
629 | (*dc++ = *sc++) != EOS;) | |
630 | continue; | |
631 | if (!match(pathend, pattern, restpattern)) { | |
632 | *pathend = EOS; | |
633 | continue; | |
634 | } | |
8d539493 | 635 | err = glob2(pathbuf, --dc, restpattern, pglob, limitp); |
84ceda19 | 636 | if (err) |
637 | break; | |
638 | } | |
639 | ||
640 | if (pglob->gl_flags & GLOB_ALTDIRFUNC) | |
641 | (*pglob->gl_closedir)(dirp); | |
642 | else | |
643 | closedir(dirp); | |
644 | return(err); | |
645 | } | |
646 | ||
647 | ||
648 | /* | |
649 | * Extend the gl_pathv member of a glob_t structure to accomodate a new item, | |
650 | * add the new item, and update gl_pathc. | |
651 | * | |
652 | * This assumes the BSD realloc, which only copies the block when its size | |
653 | * crosses a power-of-two boundary; for v7 realloc, this would cause quadratic | |
654 | * behavior. | |
655 | * | |
656 | * Return 0 if new item added, error code if memory couldn't be allocated. | |
657 | * | |
658 | * Invariant of the glob_t structure: | |
659 | * Either gl_pathc is zero and gl_pathv is NULL; or gl_pathc > 0 and | |
660 | * gl_pathv points to (gl_offs + gl_pathc + 1) items. | |
661 | */ | |
662 | static int | |
8d539493 | 663 | globextend(path, pglob, limitp) |
84ceda19 | 664 | const Char *path; |
665 | glob_t *pglob; | |
8d539493 | 666 | size_t *limitp; |
84ceda19 | 667 | { |
668 | register char **pathv; | |
669 | register int i; | |
8d539493 | 670 | u_int newsize, len; |
84ceda19 | 671 | char *copy; |
672 | const Char *p; | |
673 | ||
674 | newsize = sizeof(*pathv) * (2 + pglob->gl_pathc + pglob->gl_offs); | |
8d539493 | 675 | pathv = pglob->gl_pathv ? realloc((char *)pglob->gl_pathv, newsize) : |
676 | malloc(newsize); | |
84ceda19 | 677 | if (pathv == NULL) { |
01022caf | 678 | if (pglob->gl_pathv) { |
84ceda19 | 679 | free(pglob->gl_pathv); |
01022caf | 680 | pglob->gl_pathv = NULL; |
681 | } | |
84ceda19 | 682 | return(GLOB_NOSPACE); |
683 | } | |
684 | ||
685 | if (pglob->gl_pathv == NULL && pglob->gl_offs > 0) { | |
686 | /* first time around -- clear initial gl_offs items */ | |
687 | pathv += pglob->gl_offs; | |
688 | for (i = pglob->gl_offs; --i >= 0; ) | |
689 | *--pathv = NULL; | |
690 | } | |
691 | pglob->gl_pathv = pathv; | |
692 | ||
693 | for (p = path; *p++;) | |
694 | continue; | |
8d539493 | 695 | len = (size_t)(p - path); |
696 | *limitp += len; | |
697 | if ((copy = malloc(len)) != NULL) { | |
8d0cc79b | 698 | if (g_Ctoc(path, copy, copy+len+1)) { |
699 | free(copy); | |
700 | return(GLOB_NOSPACE); | |
701 | } | |
84ceda19 | 702 | pathv[pglob->gl_offs + pglob->gl_pathc++] = copy; |
703 | } | |
704 | pathv[pglob->gl_offs + pglob->gl_pathc] = NULL; | |
8d539493 | 705 | |
706 | if ((pglob->gl_flags & GLOB_LIMIT) && | |
9887f269 | 707 | newsize + *limitp >= (u_int) get_arg_max()) { |
8d539493 | 708 | errno = 0; |
709 | return(GLOB_NOSPACE); | |
710 | } | |
711 | ||
84ceda19 | 712 | return(copy == NULL ? GLOB_NOSPACE : 0); |
713 | } | |
714 | ||
715 | ||
716 | /* | |
717 | * pattern matching function for filenames. Each occurrence of the * | |
718 | * pattern causes a recursion level. | |
719 | */ | |
720 | static int | |
721 | match(name, pat, patend) | |
722 | register Char *name, *pat, *patend; | |
723 | { | |
724 | int ok, negate_range; | |
725 | Char c, k; | |
726 | ||
727 | while (pat < patend) { | |
728 | c = *pat++; | |
729 | switch (c & M_MASK) { | |
730 | case M_ALL: | |
731 | if (pat == patend) | |
732 | return(1); | |
733 | do | |
734 | if (match(name, pat, patend)) | |
735 | return(1); | |
8d0cc79b | 736 | while (*name++ != EOS) |
737 | ; | |
84ceda19 | 738 | return(0); |
739 | case M_ONE: | |
740 | if (*name++ == EOS) | |
741 | return(0); | |
742 | break; | |
743 | case M_SET: | |
744 | ok = 0; | |
745 | if ((k = *name++) == EOS) | |
746 | return(0); | |
747 | if ((negate_range = ((*pat & M_MASK) == M_NOT)) != EOS) | |
748 | ++pat; | |
749 | while (((c = *pat++) & M_MASK) != M_END) | |
750 | if ((*pat & M_MASK) == M_RNG) { | |
751 | if (c <= k && k <= pat[1]) | |
752 | ok = 1; | |
753 | pat += 2; | |
754 | } else if (c == k) | |
755 | ok = 1; | |
756 | if (ok == negate_range) | |
757 | return(0); | |
758 | break; | |
759 | default: | |
760 | if (*name++ != c) | |
761 | return(0); | |
762 | break; | |
763 | } | |
764 | } | |
765 | return(*name == EOS); | |
766 | } | |
767 | ||
768 | /* Free allocated data belonging to a glob_t structure. */ | |
769 | void | |
770 | globfree(pglob) | |
771 | glob_t *pglob; | |
772 | { | |
773 | register int i; | |
774 | register char **pp; | |
775 | ||
776 | if (pglob->gl_pathv != NULL) { | |
777 | pp = pglob->gl_pathv + pglob->gl_offs; | |
778 | for (i = pglob->gl_pathc; i--; ++pp) | |
779 | if (*pp) | |
780 | free(*pp); | |
781 | free(pglob->gl_pathv); | |
01022caf | 782 | pglob->gl_pathv = NULL; |
84ceda19 | 783 | } |
784 | } | |
785 | ||
786 | static DIR * | |
787 | g_opendir(str, pglob) | |
788 | register Char *str; | |
789 | glob_t *pglob; | |
790 | { | |
791 | char buf[MAXPATHLEN]; | |
792 | ||
793 | if (!*str) | |
794 | strcpy(buf, "."); | |
8d0cc79b | 795 | else { |
796 | if (g_Ctoc(str, buf, buf+sizeof(buf))) | |
797 | return(NULL); | |
798 | } | |
84ceda19 | 799 | |
800 | if (pglob->gl_flags & GLOB_ALTDIRFUNC) | |
801 | return((*pglob->gl_opendir)(buf)); | |
802 | ||
803 | return(opendir(buf)); | |
804 | } | |
805 | ||
806 | static int | |
807 | g_lstat(fn, sb, pglob) | |
808 | register Char *fn; | |
809 | struct stat *sb; | |
810 | glob_t *pglob; | |
811 | { | |
812 | char buf[MAXPATHLEN]; | |
813 | ||
8d0cc79b | 814 | if (g_Ctoc(fn, buf, buf+sizeof(buf))) |
815 | return(-1); | |
84ceda19 | 816 | if (pglob->gl_flags & GLOB_ALTDIRFUNC) |
817 | return((*pglob->gl_lstat)(buf, sb)); | |
818 | return(lstat(buf, sb)); | |
819 | } | |
820 | ||
821 | static int | |
822 | g_stat(fn, sb, pglob) | |
823 | register Char *fn; | |
824 | struct stat *sb; | |
825 | glob_t *pglob; | |
826 | { | |
827 | char buf[MAXPATHLEN]; | |
828 | ||
8d0cc79b | 829 | if (g_Ctoc(fn, buf, buf+sizeof(buf))) |
830 | return(-1); | |
84ceda19 | 831 | if (pglob->gl_flags & GLOB_ALTDIRFUNC) |
832 | return((*pglob->gl_stat)(buf, sb)); | |
833 | return(stat(buf, sb)); | |
834 | } | |
835 | ||
836 | static Char * | |
837 | g_strchr(str, ch) | |
838 | Char *str; | |
839 | int ch; | |
840 | { | |
841 | do { | |
842 | if (*str == ch) | |
843 | return (str); | |
844 | } while (*str++); | |
845 | return (NULL); | |
846 | } | |
847 | ||
8d0cc79b | 848 | static int |
849 | g_Ctoc(str, buf, ebuf) | |
84ceda19 | 850 | register const Char *str; |
8d0cc79b | 851 | char *buf, *ebuf; |
84ceda19 | 852 | { |
853 | register char *dc; | |
854 | ||
8d0cc79b | 855 | for (dc = buf; dc < ebuf && (*dc++ = *str++) != EOS;) |
84ceda19 | 856 | continue; |
8d0cc79b | 857 | if (dc >= ebuf) |
858 | return (1); | |
859 | return (0); | |
84ceda19 | 860 | } |
861 | ||
862 | #ifdef DEBUG | |
863 | static void | |
864 | qprintf(str, s) | |
865 | const char *str; | |
866 | register Char *s; | |
867 | { | |
868 | register Char *p; | |
869 | ||
870 | (void)printf("%s:\n", str); | |
871 | for (p = s; *p; p++) | |
872 | (void)printf("%c", CHAR(*p)); | |
873 | (void)printf("\n"); | |
874 | for (p = s; *p; p++) | |
875 | (void)printf("%c", *p & M_PROTECT ? '"' : ' '); | |
876 | (void)printf("\n"); | |
877 | for (p = s; *p; p++) | |
878 | (void)printf("%c", ismeta(*p) ? '_' : ' '); | |
879 | (void)printf("\n"); | |
880 | } | |
881 | #endif | |
882 | ||
40849fdb | 883 | #endif /* !defined(HAVE_GLOB) || !defined(GLOB_HAS_ALTDIRFUNC) || |
884 | !defined(GLOB_HAS_GL_MATCHC) */ | |
84ceda19 | 885 |