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1.19 ! christos 1: /* $NetBSD: glob.c,v 1.18 2006/12/01 18:57:29 christos Exp $ */
1.5 cgd 2:
1.1 cgd 3: /*
1.12 christos 4: * Copyright (c) 1989, 1993
5: * The Regents of the University of California. All rights reserved.
6: *
7: * This code is derived from software contributed to Berkeley by
8: * Guido van Rossum.
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. Neither the name of the University nor the names of its contributors
19: * may be used to endorse or promote products derived from this software
20: * without specific prior written permission.
21: *
22: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32: * SUCH DAMAGE.
1.1 cgd 33: */
34:
1.12 christos 35: #include <sys/cdefs.h>
36: #if defined(LIBC_SCCS) && !defined(lint)
37: #if 0
38: static char sccsid[] = "@(#)glob.c 8.3 (Berkeley) 10/13/93";
39: #else
1.19 ! christos 40: __RCSID("$NetBSD: glob.c,v 1.18 2006/12/01 18:57:29 christos Exp $");
1.12 christos 41: #endif
42: #endif /* LIBC_SCCS and not lint */
1.1 cgd 43:
1.12 christos 44: /*
45: * glob(3) -- a superset of the one defined in POSIX 1003.2.
46: *
47: * The [!...] convention to negate a range is supported (SysV, Posix, ksh).
48: *
49: * Optional extra services, controlled by flags not defined by POSIX:
50: *
51: * GLOB_MAGCHAR:
52: * Set in gl_flags if pattern contained a globbing character.
53: * GLOB_NOMAGIC:
54: * Same as GLOB_NOCHECK, but it will only append pattern if it did
55: * not contain any magic characters. [Used in csh style globbing]
56: * GLOB_ALTDIRFUNC:
57: * Use alternately specified directory access functions.
58: * GLOB_TILDE:
59: * expand ~user/foo to the /home/dir/of/user/foo
60: * GLOB_BRACE:
61: * expand {1,2}{a,b} to 1a 1b 2a 2b
1.19 ! christos 62: * GLOB_PERIOD:
! 63: * allow metacharacters to match leading dots in filenames.
1.12 christos 64: * gl_matchc:
65: * Number of matches in the current invocation of glob.
66: */
67:
68: #include "namespace.h"
69: #include <sys/param.h>
70: #include <sys/stat.h>
71:
72: #include <assert.h>
73: #include <ctype.h>
74: #include <dirent.h>
75: #include <errno.h>
76: #include <glob.h>
77: #include <pwd.h>
78: #include <stdio.h>
79: #include <stdlib.h>
80: #include <string.h>
81: #include <unistd.h>
82:
83: #ifdef HAVE_NBTOOL_CONFIG_H
84: #define NO_GETPW_R
85: #endif
86:
87: /*
88: * XXX: For NetBSD 1.4.x compatibility. (kill me l8r)
89: */
90: #ifndef _DIAGASSERT
91: #define _DIAGASSERT(a)
92: #endif
93:
94: #define DOLLAR '$'
95: #define DOT '.'
96: #define EOS '\0'
97: #define LBRACKET '['
98: #define NOT '!'
99: #define QUESTION '?'
100: #define QUOTE '\\'
101: #define RANGE '-'
102: #define RBRACKET ']'
103: #define SEP '/'
104: #define STAR '*'
105: #define TILDE '~'
106: #define UNDERSCORE '_'
107: #define LBRACE '{'
108: #define RBRACE '}'
109: #define SLASH '/'
110: #define COMMA ','
111:
1.15 christos 112: #ifndef USE_8BIT_CHARS
1.12 christos 113:
114: #define M_QUOTE 0x8000
115: #define M_PROTECT 0x4000
116: #define M_MASK 0xffff
117: #define M_ASCII 0x00ff
118:
119: typedef u_short Char;
120:
121: #else
122:
1.15 christos 123: #define M_QUOTE (Char)0x80
124: #define M_PROTECT (Char)0x40
125: #define M_MASK (Char)0xff
126: #define M_ASCII (Char)0x7f
1.12 christos 127:
128: typedef char Char;
129:
130: #endif
131:
132:
133: #define CHAR(c) ((Char)((c)&M_ASCII))
134: #define META(c) ((Char)((c)|M_QUOTE))
135: #define M_ALL META('*')
136: #define M_END META(']')
137: #define M_NOT META('!')
138: #define M_ONE META('?')
139: #define M_RNG META('-')
140: #define M_SET META('[')
141: #define ismeta(c) (((c)&M_QUOTE) != 0)
142:
143:
1.18 christos 144: static int compare(const void *, const void *);
145: static int g_Ctoc(const Char *, char *, size_t);
146: static int g_lstat(Char *, __gl_stat_t *, glob_t *);
147: static DIR *g_opendir(Char *, glob_t *);
148: static Char *g_strchr(const Char *, int);
149: static int g_stat(Char *, __gl_stat_t *, glob_t *);
150: static int glob0(const Char *, glob_t *);
151: static int glob1(Char *, glob_t *, size_t *);
152: static int glob2(Char *, Char *, Char *, Char *, glob_t *,
153: size_t *);
154: static int glob3(Char *, Char *, Char *, Char *, Char *, glob_t *,
155: size_t *);
156: static int globextend(const Char *, glob_t *, size_t *);
157: static const Char *globtilde(const Char *, Char *, size_t, glob_t *);
158: static int globexp1(const Char *, glob_t *);
159: static int globexp2(const Char *, const Char *, glob_t *, int *);
160: static int match(Char *, Char *, Char *);
1.12 christos 161: #ifdef DEBUG
1.18 christos 162: static void qprintf(const char *, Char *);
1.12 christos 163: #endif
164:
165: int
1.18 christos 166: glob(const char *pattern, int flags, int (*errfunc)(const char *, int),
167: glob_t *pglob)
1.12 christos 168: {
169: const u_char *patnext;
170: int c;
171: Char *bufnext, *bufend, patbuf[MAXPATHLEN+1];
172:
173: _DIAGASSERT(pattern != NULL);
174:
175: patnext = (const u_char *) pattern;
176: if (!(flags & GLOB_APPEND)) {
177: pglob->gl_pathc = 0;
178: pglob->gl_pathv = NULL;
179: if (!(flags & GLOB_DOOFFS))
180: pglob->gl_offs = 0;
181: }
182: pglob->gl_flags = flags & ~GLOB_MAGCHAR;
183: pglob->gl_errfunc = errfunc;
184: pglob->gl_matchc = 0;
185:
186: bufnext = patbuf;
187: bufend = bufnext + MAXPATHLEN;
188: if (flags & GLOB_NOESCAPE) {
189: while (bufnext < bufend && (c = *patnext++) != EOS)
190: *bufnext++ = c;
191: } else {
192: /* Protect the quoted characters. */
193: while (bufnext < bufend && (c = *patnext++) != EOS)
194: if (c == QUOTE) {
195: if ((c = *patnext++) == EOS) {
196: c = QUOTE;
197: --patnext;
198: }
199: *bufnext++ = c | M_PROTECT;
200: }
201: else
202: *bufnext++ = c;
203: }
204: *bufnext = EOS;
205:
206: if (flags & GLOB_BRACE)
207: return globexp1(patbuf, pglob);
208: else
209: return glob0(patbuf, pglob);
210: }
211:
212: /*
213: * Expand recursively a glob {} pattern. When there is no more expansion
214: * invoke the standard globbing routine to glob the rest of the magic
215: * characters
216: */
217: static int
1.18 christos 218: globexp1(const Char *pattern, glob_t *pglob)
1.12 christos 219: {
220: const Char* ptr = pattern;
221: int rv;
222:
223: _DIAGASSERT(pattern != NULL);
224: _DIAGASSERT(pglob != NULL);
225:
226: /* Protect a single {}, for find(1), like csh */
227: if (pattern[0] == LBRACE && pattern[1] == RBRACE && pattern[2] == EOS)
228: return glob0(pattern, pglob);
229:
230: while ((ptr = (const Char *) g_strchr(ptr, LBRACE)) != NULL)
231: if (!globexp2(ptr, pattern, pglob, &rv))
232: return rv;
233:
234: return glob0(pattern, pglob);
235: }
236:
237:
238: /*
239: * Recursive brace globbing helper. Tries to expand a single brace.
240: * If it succeeds then it invokes globexp1 with the new pattern.
241: * If it fails then it tries to glob the rest of the pattern and returns.
242: */
243: static int
1.18 christos 244: globexp2(const Char *ptr, const Char *pattern, glob_t *pglob, int *rv)
1.12 christos 245: {
246: int i;
247: Char *lm, *ls;
248: const Char *pe, *pm, *pl;
249: Char patbuf[MAXPATHLEN + 1];
250:
251: _DIAGASSERT(ptr != NULL);
252: _DIAGASSERT(pattern != NULL);
253: _DIAGASSERT(pglob != NULL);
254: _DIAGASSERT(rv != NULL);
255:
256: /* copy part up to the brace */
257: for (lm = patbuf, pm = pattern; pm != ptr; *lm++ = *pm++)
258: continue;
259: ls = lm;
260:
261: /* Find the balanced brace */
262: for (i = 0, pe = ++ptr; *pe; pe++)
263: if (*pe == LBRACKET) {
264: /* Ignore everything between [] */
265: for (pm = pe++; *pe != RBRACKET && *pe != EOS; pe++)
266: continue;
267: if (*pe == EOS) {
268: /*
269: * We could not find a matching RBRACKET.
270: * Ignore and just look for RBRACE
271: */
272: pe = pm;
273: }
274: }
275: else if (*pe == LBRACE)
276: i++;
277: else if (*pe == RBRACE) {
278: if (i == 0)
279: break;
280: i--;
281: }
282:
283: /* Non matching braces; just glob the pattern */
284: if (i != 0 || *pe == EOS) {
285: /*
286: * we use `pattern', not `patbuf' here so that that
287: * unbalanced braces are passed to the match
288: */
289: *rv = glob0(pattern, pglob);
290: return 0;
291: }
292:
293: for (i = 0, pl = pm = ptr; pm <= pe; pm++) {
294: switch (*pm) {
295: case LBRACKET:
296: /* Ignore everything between [] */
297: for (pl = pm++; *pm != RBRACKET && *pm != EOS; pm++)
298: continue;
299: if (*pm == EOS) {
300: /*
301: * We could not find a matching RBRACKET.
302: * Ignore and just look for RBRACE
303: */
304: pm = pl;
305: }
306: break;
307:
308: case LBRACE:
309: i++;
310: break;
311:
312: case RBRACE:
313: if (i) {
314: i--;
315: break;
316: }
317: /* FALLTHROUGH */
318: case COMMA:
319: if (i && *pm == COMMA)
320: break;
321: else {
322: /* Append the current string */
323: for (lm = ls; (pl < pm); *lm++ = *pl++)
324: continue;
325: /*
326: * Append the rest of the pattern after the
327: * closing brace
328: */
329: for (pl = pe + 1; (*lm++ = *pl++) != EOS;)
330: continue;
331:
332: /* Expand the current pattern */
333: #ifdef DEBUG
334: qprintf("globexp2:", patbuf);
335: #endif
336: *rv = globexp1(patbuf, pglob);
337:
338: /* move after the comma, to the next string */
339: pl = pm + 1;
340: }
341: break;
342:
343: default:
344: break;
345: }
346: }
347: *rv = 0;
348: return 0;
349: }
350:
351:
352:
353: /*
354: * expand tilde from the passwd file.
355: */
356: static const Char *
1.18 christos 357: globtilde(const Char *pattern, Char *patbuf, size_t patsize, glob_t *pglob)
1.12 christos 358: {
359: struct passwd *pwd;
360: const char *h;
361: const Char *p;
362: Char *b;
363: char *d;
364: Char *pend = &patbuf[patsize / sizeof(Char)];
365: #ifndef NO_GETPW_R
366: struct passwd pwres;
367: char pwbuf[1024];
368: #endif
369:
370: pend--;
371:
372: _DIAGASSERT(pattern != NULL);
373: _DIAGASSERT(patbuf != NULL);
374: _DIAGASSERT(pglob != NULL);
375:
376: if (*pattern != TILDE || !(pglob->gl_flags & GLOB_TILDE))
377: return pattern;
378:
379: /* Copy up to the end of the string or / */
380: for (p = pattern + 1, d = (char *)(void *)patbuf;
381: d < (char *)(void *)pend && *p && *p != SLASH;
382: *d++ = *p++)
383: continue;
384:
385: if (d == (char *)(void *)pend)
386: return NULL;
387:
388: *d = EOS;
389: d = (char *)(void *)patbuf;
390:
391: if (*d == EOS) {
392: /*
393: * handle a plain ~ or ~/ by expanding $HOME
394: * first and then trying the password file
395: */
396: if ((h = getenv("HOME")) == NULL) {
397: #ifdef NO_GETPW_R
398: if ((pwd = getpwuid(getuid())) == NULL)
399: #else
400: if (getpwuid_r(getuid(), &pwres, pwbuf, sizeof(pwbuf),
401: &pwd) != 0 || pwd == NULL)
402: #endif
403: return pattern;
404: else
405: h = pwd->pw_dir;
406: }
407: }
408: else {
409: /*
410: * Expand a ~user
411: */
412: #ifdef NO_GETPW_R
413: if ((pwd = getpwnam(d)) == NULL)
414: #else
415: if (getpwnam_r(d, &pwres, pwbuf, sizeof(pwbuf), &pwd) != 0 ||
416: pwd == NULL)
417: #endif
418: return pattern;
419: else
420: h = pwd->pw_dir;
421: }
422:
423: /* Copy the home directory */
424: for (b = patbuf; b < pend && *h; *b++ = *h++)
425: continue;
426:
427: if (b == pend)
428: return NULL;
429:
430: /* Append the rest of the pattern */
431: while (b < pend && (*b++ = *p++) != EOS)
432: continue;
433:
434: if (b == pend)
435: return NULL;
436:
437: return patbuf;
438: }
439:
440:
441: /*
442: * The main glob() routine: compiles the pattern (optionally processing
443: * quotes), calls glob1() to do the real pattern matching, and finally
444: * sorts the list (unless unsorted operation is requested). Returns 0
445: * if things went well, nonzero if errors occurred. It is not an error
446: * to find no matches.
447: */
448: static int
1.18 christos 449: glob0(const Char *pattern, glob_t *pglob)
1.12 christos 450: {
451: const Char *qpatnext;
1.16 christos 452: int c, error;
453: __gl_size_t oldpathc;
1.12 christos 454: Char *bufnext, patbuf[MAXPATHLEN+1];
455: size_t limit = 0;
456:
457: _DIAGASSERT(pattern != NULL);
458: _DIAGASSERT(pglob != NULL);
459:
460: if ((qpatnext = globtilde(pattern, patbuf, sizeof(patbuf),
461: pglob)) == NULL)
462: return GLOB_ABEND;
463: oldpathc = pglob->gl_pathc;
464: bufnext = patbuf;
465:
466: /* We don't need to check for buffer overflow any more. */
467: while ((c = *qpatnext++) != EOS) {
468: switch (c) {
469: case LBRACKET:
470: c = *qpatnext;
471: if (c == NOT)
472: ++qpatnext;
473: if (*qpatnext == EOS ||
474: g_strchr(qpatnext+1, RBRACKET) == NULL) {
475: *bufnext++ = LBRACKET;
476: if (c == NOT)
477: --qpatnext;
478: break;
479: }
480: *bufnext++ = M_SET;
481: if (c == NOT)
482: *bufnext++ = M_NOT;
483: c = *qpatnext++;
484: do {
485: *bufnext++ = CHAR(c);
486: if (*qpatnext == RANGE &&
487: (c = qpatnext[1]) != RBRACKET) {
488: *bufnext++ = M_RNG;
489: *bufnext++ = CHAR(c);
490: qpatnext += 2;
491: }
492: } while ((c = *qpatnext++) != RBRACKET);
493: pglob->gl_flags |= GLOB_MAGCHAR;
494: *bufnext++ = M_END;
495: break;
496: case QUESTION:
497: pglob->gl_flags |= GLOB_MAGCHAR;
498: *bufnext++ = M_ONE;
499: break;
500: case STAR:
501: pglob->gl_flags |= GLOB_MAGCHAR;
502: /* collapse adjacent stars to one,
503: * to avoid exponential behavior
504: */
505: if (bufnext == patbuf || bufnext[-1] != M_ALL)
506: *bufnext++ = M_ALL;
507: break;
508: default:
509: *bufnext++ = CHAR(c);
510: break;
511: }
512: }
513: *bufnext = EOS;
514: #ifdef DEBUG
515: qprintf("glob0:", patbuf);
516: #endif
517:
518: if ((error = glob1(patbuf, pglob, &limit)) != 0)
1.18 christos 519: return error;
1.12 christos 520:
521: if (pglob->gl_pathc == oldpathc) {
522: /*
523: * If there was no match we are going to append the pattern
524: * if GLOB_NOCHECK was specified or if GLOB_NOMAGIC was
525: * specified and the pattern did not contain any magic
526: * characters GLOB_NOMAGIC is there just for compatibility
527: * with csh.
528: */
529: if ((pglob->gl_flags & GLOB_NOCHECK) ||
530: ((pglob->gl_flags & (GLOB_NOMAGIC|GLOB_MAGCHAR))
531: == GLOB_NOMAGIC)) {
532: return globextend(pattern, pglob, &limit);
533: } else {
1.18 christos 534: return GLOB_NOMATCH;
1.12 christos 535: }
536: } else if (!(pglob->gl_flags & GLOB_NOSORT)) {
537: qsort(pglob->gl_pathv + pglob->gl_offs + oldpathc,
538: (size_t)pglob->gl_pathc - oldpathc, sizeof(char *),
539: compare);
540: }
541:
1.18 christos 542: return 0;
1.12 christos 543: }
544:
545: static int
1.18 christos 546: compare(const void *p, const void *q)
1.12 christos 547: {
548:
549: _DIAGASSERT(p != NULL);
550: _DIAGASSERT(q != NULL);
551:
1.18 christos 552: return strcoll(*(const char * const *)p, *(const char * const *)q);
1.12 christos 553: }
554:
555: static int
1.18 christos 556: glob1(Char *pattern, glob_t *pglob, size_t *limit)
1.12 christos 557: {
558: Char pathbuf[MAXPATHLEN+1];
559:
560: _DIAGASSERT(pattern != NULL);
561: _DIAGASSERT(pglob != NULL);
562:
563: /* A null pathname is invalid -- POSIX 1003.1 sect. 2.4. */
564: if (*pattern == EOS)
1.18 christos 565: return 0;
1.12 christos 566: /*
567: * we save one character so that we can use ptr >= limit,
568: * in the general case when we are appending non nul chars only.
569: */
1.18 christos 570: return glob2(pathbuf, pathbuf,
571: pathbuf + (sizeof(pathbuf) / sizeof(*pathbuf)) - 1, pattern,
572: pglob, limit);
1.12 christos 573: }
574:
575: /*
576: * The functions glob2 and glob3 are mutually recursive; there is one level
577: * of recursion for each segment in the pattern that contains one or more
578: * meta characters.
579: */
580: static int
1.18 christos 581: glob2(Char *pathbuf, Char *pathend, Char *pathlim, Char *pattern, glob_t *pglob,
582: size_t *limit)
1.12 christos 583: {
584: __gl_stat_t sb;
585: Char *p, *q;
586: int anymeta;
587:
588: _DIAGASSERT(pathbuf != NULL);
589: _DIAGASSERT(pathend != NULL);
590: _DIAGASSERT(pattern != NULL);
591: _DIAGASSERT(pglob != NULL);
592:
593: /*
594: * Loop over pattern segments until end of pattern or until
595: * segment with meta character found.
596: */
597: for (anymeta = 0;;) {
598: if (*pattern == EOS) { /* End of pattern? */
599: *pathend = EOS;
600: if (g_lstat(pathbuf, &sb, pglob))
1.18 christos 601: return 0;
1.12 christos 602:
603: if (((pglob->gl_flags & GLOB_MARK) &&
604: pathend[-1] != SEP) && (S_ISDIR(sb.st_mode) ||
605: (S_ISLNK(sb.st_mode) &&
606: (g_stat(pathbuf, &sb, pglob) == 0) &&
607: S_ISDIR(sb.st_mode)))) {
608: if (pathend >= pathlim)
1.18 christos 609: return GLOB_ABORTED;
1.12 christos 610: *pathend++ = SEP;
611: *pathend = EOS;
612: }
613: ++pglob->gl_matchc;
1.18 christos 614: return globextend(pathbuf, pglob, limit);
1.12 christos 615: }
616:
617: /* Find end of next segment, copy tentatively to pathend. */
618: q = pathend;
619: p = pattern;
620: while (*p != EOS && *p != SEP) {
621: if (ismeta(*p))
622: anymeta = 1;
623: if (q >= pathlim)
624: return GLOB_ABORTED;
625: *q++ = *p++;
626: }
627:
628: if (!anymeta) { /* No expansion, do next segment. */
629: pathend = q;
630: pattern = p;
631: while (*pattern == SEP) {
632: if (pathend >= pathlim)
633: return GLOB_ABORTED;
634: *pathend++ = *pattern++;
635: }
636: } else /* Need expansion, recurse. */
1.18 christos 637: return glob3(pathbuf, pathend, pathlim, pattern, p,
638: pglob, limit);
1.12 christos 639: }
640: /* NOTREACHED */
641: }
642:
643: static int
1.18 christos 644: glob3(Char *pathbuf, Char *pathend, Char *pathlim, Char *pattern,
645: Char *restpattern, glob_t *pglob, size_t *limit)
1.12 christos 646: {
647: struct dirent *dp;
648: DIR *dirp;
649: int error;
650: char buf[MAXPATHLEN];
651:
652: /*
653: * The readdirfunc declaration can't be prototyped, because it is
654: * assigned, below, to two functions which are prototyped in glob.h
655: * and dirent.h as taking pointers to differently typed opaque
656: * structures.
657: */
1.18 christos 658: struct dirent *(*readdirfunc)(void *);
1.12 christos 659:
660: _DIAGASSERT(pathbuf != NULL);
661: _DIAGASSERT(pathend != NULL);
662: _DIAGASSERT(pattern != NULL);
663: _DIAGASSERT(restpattern != NULL);
664: _DIAGASSERT(pglob != NULL);
665:
666: *pathend = EOS;
667: errno = 0;
668:
669: if ((dirp = g_opendir(pathbuf, pglob)) == NULL) {
670: if (pglob->gl_errfunc) {
671: if (g_Ctoc(pathbuf, buf, sizeof(buf)))
1.18 christos 672: return GLOB_ABORTED;
1.12 christos 673: if (pglob->gl_errfunc(buf, errno) ||
674: pglob->gl_flags & GLOB_ERR)
1.18 christos 675: return GLOB_ABORTED;
1.12 christos 676: }
677: /*
678: * Posix/XOpen: glob should return when it encounters a
679: * directory that it cannot open or read
680: * XXX: Should we ignore ENOTDIR and ENOENT though?
681: * I think that Posix had in mind EPERM...
682: */
683: if (pglob->gl_flags & GLOB_ERR)
1.18 christos 684: return GLOB_ABORTED;
1.12 christos 685:
1.18 christos 686: return 0;
1.12 christos 687: }
688:
689: error = 0;
690:
691: /* Search directory for matching names. */
692: if (pglob->gl_flags & GLOB_ALTDIRFUNC)
693: readdirfunc = pglob->gl_readdir;
694: else
695: readdirfunc = (struct dirent *(*)__P((void *))) readdir;
696: while ((dp = (*readdirfunc)(dirp)) != NULL) {
697: u_char *sc;
698: Char *dc;
699:
1.19 ! christos 700: /*
! 701: * Initial DOT must be matched literally, unless we have
! 702: * GLOB_PERIOD set.
! 703: */
! 704: if ((pglob->gl_flags & GLOB_PERIOD) == 0)
! 705: if (dp->d_name[0] == DOT && *pattern != DOT)
! 706: continue;
1.12 christos 707: /*
708: * The resulting string contains EOS, so we can
709: * use the pathlim character, if it is the nul
710: */
711: for (sc = (u_char *) dp->d_name, dc = pathend;
712: dc <= pathlim && (*dc++ = *sc++) != EOS;)
713: continue;
714:
715: /*
716: * Have we filled the buffer without seeing EOS?
717: */
718: if (dc > pathlim && *pathlim != EOS) {
719: /*
720: * Abort when requested by caller, otherwise
721: * reset pathend back to last SEP and continue
722: * with next dir entry.
723: */
724: if (pglob->gl_flags & GLOB_ERR) {
725: error = GLOB_ABORTED;
726: break;
727: }
728: else {
729: *pathend = EOS;
730: continue;
731: }
732: }
733:
734: if (!match(pathend, pattern, restpattern)) {
735: *pathend = EOS;
736: continue;
737: }
738: error = glob2(pathbuf, --dc, pathlim, restpattern, pglob, limit);
739: if (error)
740: break;
741: }
742:
743: if (pglob->gl_flags & GLOB_ALTDIRFUNC)
744: (*pglob->gl_closedir)(dirp);
745: else
746: closedir(dirp);
747:
748: /*
749: * Again Posix X/Open issue with regards to error handling.
750: */
751: if ((error || errno) && (pglob->gl_flags & GLOB_ERR))
1.18 christos 752: return GLOB_ABORTED;
1.12 christos 753:
1.18 christos 754: return error;
1.12 christos 755: }
756:
757:
758: /*
1.17 christos 759: * Extend the gl_pathv member of a glob_t structure to accommodate a new item,
1.12 christos 760: * add the new item, and update gl_pathc.
761: *
762: * This assumes the BSD realloc, which only copies the block when its size
763: * crosses a power-of-two boundary; for v7 realloc, this would cause quadratic
764: * behavior.
765: *
766: * Return 0 if new item added, error code if memory couldn't be allocated.
767: *
768: * Invariant of the glob_t structure:
769: * Either gl_pathc is zero and gl_pathv is NULL; or gl_pathc > 0 and
770: * gl_pathv points to (gl_offs + gl_pathc + 1) items.
771: */
772: static int
1.18 christos 773: globextend(const Char *path, glob_t *pglob, size_t *limit)
1.12 christos 774: {
775: char **pathv;
1.16 christos 776: size_t i, newsize, len;
1.12 christos 777: char *copy;
778: const Char *p;
779:
780: _DIAGASSERT(path != NULL);
781: _DIAGASSERT(pglob != NULL);
782:
783: newsize = sizeof(*pathv) * (2 + pglob->gl_pathc + pglob->gl_offs);
784: pathv = pglob->gl_pathv ? realloc(pglob->gl_pathv, newsize) :
785: malloc(newsize);
786: if (pathv == NULL)
1.18 christos 787: return GLOB_NOSPACE;
1.12 christos 788:
789: if (pglob->gl_pathv == NULL && pglob->gl_offs > 0) {
790: /* first time around -- clear initial gl_offs items */
791: pathv += pglob->gl_offs;
1.16 christos 792: for (i = pglob->gl_offs + 1; --i > 0; )
1.12 christos 793: *--pathv = NULL;
794: }
795: pglob->gl_pathv = pathv;
796:
797: for (p = path; *p++;)
798: continue;
799: len = (size_t)(p - path);
800: *limit += len;
801: if ((copy = malloc(len)) != NULL) {
802: if (g_Ctoc(path, copy, len)) {
803: free(copy);
1.18 christos 804: return GLOB_ABORTED;
1.12 christos 805: }
806: pathv[pglob->gl_offs + pglob->gl_pathc++] = copy;
807: }
808: pathv[pglob->gl_offs + pglob->gl_pathc] = NULL;
809:
810: if ((pglob->gl_flags & GLOB_LIMIT) && (newsize + *limit) >= ARG_MAX) {
811: errno = 0;
1.18 christos 812: return GLOB_NOSPACE;
1.12 christos 813: }
814:
1.18 christos 815: return copy == NULL ? GLOB_NOSPACE : 0;
1.12 christos 816: }
817:
818:
819: /*
820: * pattern matching function for filenames. Each occurrence of the *
821: * pattern causes a recursion level.
822: */
823: static int
1.18 christos 824: match(Char *name, Char *pat, Char *patend)
1.12 christos 825: {
826: int ok, negate_range;
827: Char c, k;
828:
829: _DIAGASSERT(name != NULL);
830: _DIAGASSERT(pat != NULL);
831: _DIAGASSERT(patend != NULL);
832:
833: while (pat < patend) {
834: c = *pat++;
835: switch (c & M_MASK) {
836: case M_ALL:
837: if (pat == patend)
1.18 christos 838: return 1;
1.12 christos 839: do
840: if (match(name, pat, patend))
1.18 christos 841: return 1;
1.12 christos 842: while (*name++ != EOS);
1.18 christos 843: return 0;
1.12 christos 844: case M_ONE:
845: if (*name++ == EOS)
1.18 christos 846: return 0;
1.12 christos 847: break;
848: case M_SET:
849: ok = 0;
850: if ((k = *name++) == EOS)
1.18 christos 851: return 0;
1.12 christos 852: if ((negate_range = ((*pat & M_MASK) == M_NOT)) != EOS)
853: ++pat;
854: while (((c = *pat++) & M_MASK) != M_END)
855: if ((*pat & M_MASK) == M_RNG) {
856: if (c <= k && k <= pat[1])
857: ok = 1;
858: pat += 2;
859: } else if (c == k)
860: ok = 1;
861: if (ok == negate_range)
1.18 christos 862: return 0;
1.12 christos 863: break;
864: default:
865: if (*name++ != c)
1.18 christos 866: return 0;
1.12 christos 867: break;
868: }
869: }
1.18 christos 870: return *name == EOS;
1.12 christos 871: }
872:
873: /* Free allocated data belonging to a glob_t structure. */
874: void
1.18 christos 875: globfree(glob_t *pglob)
1.12 christos 876: {
1.16 christos 877: size_t i;
1.12 christos 878: char **pp;
879:
880: _DIAGASSERT(pglob != NULL);
881:
882: if (pglob->gl_pathv != NULL) {
883: pp = pglob->gl_pathv + pglob->gl_offs;
884: for (i = pglob->gl_pathc; i--; ++pp)
885: if (*pp)
886: free(*pp);
887: free(pglob->gl_pathv);
888: pglob->gl_pathv = NULL;
889: pglob->gl_pathc = 0;
890: }
891: }
892:
893: static DIR *
1.18 christos 894: g_opendir(Char *str, glob_t *pglob)
1.12 christos 895: {
896: char buf[MAXPATHLEN];
897:
898: _DIAGASSERT(str != NULL);
899: _DIAGASSERT(pglob != NULL);
900:
901: if (!*str)
902: (void)strlcpy(buf, ".", sizeof(buf));
903: else {
904: if (g_Ctoc(str, buf, sizeof(buf)))
905: return NULL;
906: }
907:
908: if (pglob->gl_flags & GLOB_ALTDIRFUNC)
1.18 christos 909: return (*pglob->gl_opendir)(buf);
1.12 christos 910:
1.18 christos 911: return opendir(buf);
1.12 christos 912: }
913:
914: static int
1.18 christos 915: g_lstat(Char *fn, __gl_stat_t *sb, glob_t *pglob)
1.12 christos 916: {
917: char buf[MAXPATHLEN];
918:
919: _DIAGASSERT(fn != NULL);
920: _DIAGASSERT(sb != NULL);
921: _DIAGASSERT(pglob != NULL);
922:
923: if (g_Ctoc(fn, buf, sizeof(buf)))
924: return -1;
925: if (pglob->gl_flags & GLOB_ALTDIRFUNC)
1.18 christos 926: return (*pglob->gl_lstat)(buf, sb);
927: return lstat(buf, sb);
1.12 christos 928: }
929:
930: static int
1.18 christos 931: g_stat(Char *fn, __gl_stat_t *sb, glob_t *pglob)
1.12 christos 932: {
933: char buf[MAXPATHLEN];
934:
935: _DIAGASSERT(fn != NULL);
936: _DIAGASSERT(sb != NULL);
937: _DIAGASSERT(pglob != NULL);
938:
939: if (g_Ctoc(fn, buf, sizeof(buf)))
940: return -1;
941: if (pglob->gl_flags & GLOB_ALTDIRFUNC)
1.18 christos 942: return (*pglob->gl_stat)(buf, sb);
943: return stat(buf, sb);
1.12 christos 944: }
945:
946: static Char *
1.18 christos 947: g_strchr(const Char *str, int ch)
1.12 christos 948: {
949:
950: _DIAGASSERT(str != NULL);
951:
952: do {
953: if (*str == ch)
1.14 christos 954: return __UNCONST(str);
1.12 christos 955: } while (*str++);
956: return NULL;
957: }
958:
959: static int
1.18 christos 960: g_Ctoc(const Char *str, char *buf, size_t len)
1.12 christos 961: {
962: char *dc;
963:
964: _DIAGASSERT(str != NULL);
965: _DIAGASSERT(buf != NULL);
966:
967: if (len == 0)
968: return 1;
969:
970: for (dc = buf; len && (*dc++ = *str++) != EOS; len--)
971: continue;
972:
973: return len == 0;
974: }
975:
976: #ifdef DEBUG
977: static void
1.18 christos 978: qprintf(const char *str, Char *s)
1.12 christos 979: {
980: Char *p;
981:
982: _DIAGASSERT(str != NULL);
983: _DIAGASSERT(s != NULL);
984:
985: (void)printf("%s:\n", str);
986: for (p = s; *p; p++)
987: (void)printf("%c", CHAR(*p));
988: (void)printf("\n");
989: for (p = s; *p; p++)
990: (void)printf("%c", *p & M_PROTECT ? '"' : ' ');
991: (void)printf("\n");
992: for (p = s; *p; p++)
993: (void)printf("%c", ismeta(*p) ? '_' : ' ');
994: (void)printf("\n");
995: }
996: #endif