Annotation of src/lib/libc/gen/glob.c, Revision 1.18
1.18 ! christos 1: /* $NetBSD: glob.c,v 1.17 2006/11/24 19:46:58 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
1.18 ! christos 40: __RCSID("$NetBSD: glob.c,v 1.17 2006/11/24 19:46:58 christos Exp $");
1.12 christos 41: #endif
42: #endif /* LIBC_SCCS and not lint */
1.1 cgd 43:
1.12 christos 44: /*
45: * glob(3) -- a superset of the one defined in POSIX 1003.2.
46: *
47: * The [!...] convention to negate a range is supported (SysV, Posix, ksh).
48: *
49: * Optional extra services, controlled by flags not defined by POSIX:
50: *
51: * GLOB_MAGCHAR:
52: * Set in gl_flags if pattern contained a globbing character.
53: * GLOB_NOMAGIC:
54: * Same as GLOB_NOCHECK, but it will only append pattern if it did
55: * not contain any magic characters. [Used in csh style globbing]
56: * GLOB_ALTDIRFUNC:
57: * Use alternately specified directory access functions.
58: * GLOB_TILDE:
59: * expand ~user/foo to the /home/dir/of/user/foo
60: * GLOB_BRACE:
61: * expand {1,2}{a,b} to 1a 1b 2a 2b
62: * gl_matchc:
63: * Number of matches in the current invocation of glob.
64: */
65:
66: #include "namespace.h"
67: #include <sys/param.h>
68: #include <sys/stat.h>
69:
70: #include <assert.h>
71: #include <ctype.h>
72: #include <dirent.h>
73: #include <errno.h>
74: #include <glob.h>
75: #include <pwd.h>
76: #include <stdio.h>
77: #include <stdlib.h>
78: #include <string.h>
79: #include <unistd.h>
80:
81: #ifdef HAVE_NBTOOL_CONFIG_H
82: #define NO_GETPW_R
83: #endif
84:
85: /*
86: * XXX: For NetBSD 1.4.x compatibility. (kill me l8r)
87: */
88: #ifndef _DIAGASSERT
89: #define _DIAGASSERT(a)
90: #endif
91:
92: #define DOLLAR '$'
93: #define DOT '.'
94: #define EOS '\0'
95: #define LBRACKET '['
96: #define NOT '!'
97: #define QUESTION '?'
98: #define QUOTE '\\'
99: #define RANGE '-'
100: #define RBRACKET ']'
101: #define SEP '/'
102: #define STAR '*'
103: #define TILDE '~'
104: #define UNDERSCORE '_'
105: #define LBRACE '{'
106: #define RBRACE '}'
107: #define SLASH '/'
108: #define COMMA ','
109:
1.15 christos 110: #ifndef USE_8BIT_CHARS
1.12 christos 111:
112: #define M_QUOTE 0x8000
113: #define M_PROTECT 0x4000
114: #define M_MASK 0xffff
115: #define M_ASCII 0x00ff
116:
117: typedef u_short Char;
118:
119: #else
120:
1.15 christos 121: #define M_QUOTE (Char)0x80
122: #define M_PROTECT (Char)0x40
123: #define M_MASK (Char)0xff
124: #define M_ASCII (Char)0x7f
1.12 christos 125:
126: typedef char Char;
127:
128: #endif
129:
130:
131: #define CHAR(c) ((Char)((c)&M_ASCII))
132: #define META(c) ((Char)((c)|M_QUOTE))
133: #define M_ALL META('*')
134: #define M_END META(']')
135: #define M_NOT META('!')
136: #define M_ONE META('?')
137: #define M_RNG META('-')
138: #define M_SET META('[')
139: #define ismeta(c) (((c)&M_QUOTE) != 0)
140:
141:
1.18 ! christos 142: static int compare(const void *, const void *);
! 143: static int g_Ctoc(const Char *, char *, size_t);
! 144: static int g_lstat(Char *, __gl_stat_t *, glob_t *);
! 145: static DIR *g_opendir(Char *, glob_t *);
! 146: static Char *g_strchr(const Char *, int);
! 147: static int g_stat(Char *, __gl_stat_t *, glob_t *);
! 148: static int glob0(const Char *, glob_t *);
! 149: static int glob1(Char *, glob_t *, size_t *);
! 150: static int glob2(Char *, Char *, Char *, Char *, glob_t *,
! 151: size_t *);
! 152: static int glob3(Char *, Char *, Char *, Char *, Char *, glob_t *,
! 153: size_t *);
! 154: static int globextend(const Char *, glob_t *, size_t *);
! 155: static const Char *globtilde(const Char *, Char *, size_t, glob_t *);
! 156: static int globexp1(const Char *, glob_t *);
! 157: static int globexp2(const Char *, const Char *, glob_t *, int *);
! 158: static int match(Char *, Char *, Char *);
1.12 christos 159: #ifdef DEBUG
1.18 ! christos 160: static void qprintf(const char *, Char *);
1.12 christos 161: #endif
162:
163: int
1.18 ! christos 164: glob(const char *pattern, int flags, int (*errfunc)(const char *, int),
! 165: glob_t *pglob)
1.12 christos 166: {
167: const u_char *patnext;
168: int c;
169: Char *bufnext, *bufend, patbuf[MAXPATHLEN+1];
170:
171: _DIAGASSERT(pattern != NULL);
172:
173: patnext = (const u_char *) pattern;
174: if (!(flags & GLOB_APPEND)) {
175: pglob->gl_pathc = 0;
176: pglob->gl_pathv = NULL;
177: if (!(flags & GLOB_DOOFFS))
178: pglob->gl_offs = 0;
179: }
180: pglob->gl_flags = flags & ~GLOB_MAGCHAR;
181: pglob->gl_errfunc = errfunc;
182: pglob->gl_matchc = 0;
183:
184: bufnext = patbuf;
185: bufend = bufnext + MAXPATHLEN;
186: if (flags & GLOB_NOESCAPE) {
187: while (bufnext < bufend && (c = *patnext++) != EOS)
188: *bufnext++ = c;
189: } else {
190: /* Protect the quoted characters. */
191: while (bufnext < bufend && (c = *patnext++) != EOS)
192: if (c == QUOTE) {
193: if ((c = *patnext++) == EOS) {
194: c = QUOTE;
195: --patnext;
196: }
197: *bufnext++ = c | M_PROTECT;
198: }
199: else
200: *bufnext++ = c;
201: }
202: *bufnext = EOS;
203:
204: if (flags & GLOB_BRACE)
205: return globexp1(patbuf, pglob);
206: else
207: return glob0(patbuf, pglob);
208: }
209:
210: /*
211: * Expand recursively a glob {} pattern. When there is no more expansion
212: * invoke the standard globbing routine to glob the rest of the magic
213: * characters
214: */
215: static int
1.18 ! christos 216: globexp1(const Char *pattern, glob_t *pglob)
1.12 christos 217: {
218: const Char* ptr = pattern;
219: int rv;
220:
221: _DIAGASSERT(pattern != NULL);
222: _DIAGASSERT(pglob != NULL);
223:
224: /* Protect a single {}, for find(1), like csh */
225: if (pattern[0] == LBRACE && pattern[1] == RBRACE && pattern[2] == EOS)
226: return glob0(pattern, pglob);
227:
228: while ((ptr = (const Char *) g_strchr(ptr, LBRACE)) != NULL)
229: if (!globexp2(ptr, pattern, pglob, &rv))
230: return rv;
231:
232: return glob0(pattern, pglob);
233: }
234:
235:
236: /*
237: * Recursive brace globbing helper. Tries to expand a single brace.
238: * If it succeeds then it invokes globexp1 with the new pattern.
239: * If it fails then it tries to glob the rest of the pattern and returns.
240: */
241: static int
1.18 ! christos 242: globexp2(const Char *ptr, const Char *pattern, glob_t *pglob, int *rv)
1.12 christos 243: {
244: int i;
245: Char *lm, *ls;
246: const Char *pe, *pm, *pl;
247: Char patbuf[MAXPATHLEN + 1];
248:
249: _DIAGASSERT(ptr != NULL);
250: _DIAGASSERT(pattern != NULL);
251: _DIAGASSERT(pglob != NULL);
252: _DIAGASSERT(rv != NULL);
253:
254: /* copy part up to the brace */
255: for (lm = patbuf, pm = pattern; pm != ptr; *lm++ = *pm++)
256: continue;
257: ls = lm;
258:
259: /* Find the balanced brace */
260: for (i = 0, pe = ++ptr; *pe; pe++)
261: if (*pe == LBRACKET) {
262: /* Ignore everything between [] */
263: for (pm = pe++; *pe != RBRACKET && *pe != EOS; pe++)
264: continue;
265: if (*pe == EOS) {
266: /*
267: * We could not find a matching RBRACKET.
268: * Ignore and just look for RBRACE
269: */
270: pe = pm;
271: }
272: }
273: else if (*pe == LBRACE)
274: i++;
275: else if (*pe == RBRACE) {
276: if (i == 0)
277: break;
278: i--;
279: }
280:
281: /* Non matching braces; just glob the pattern */
282: if (i != 0 || *pe == EOS) {
283: /*
284: * we use `pattern', not `patbuf' here so that that
285: * unbalanced braces are passed to the match
286: */
287: *rv = glob0(pattern, pglob);
288: return 0;
289: }
290:
291: for (i = 0, pl = pm = ptr; pm <= pe; pm++) {
292: switch (*pm) {
293: case LBRACKET:
294: /* Ignore everything between [] */
295: for (pl = pm++; *pm != RBRACKET && *pm != EOS; pm++)
296: continue;
297: if (*pm == EOS) {
298: /*
299: * We could not find a matching RBRACKET.
300: * Ignore and just look for RBRACE
301: */
302: pm = pl;
303: }
304: break;
305:
306: case LBRACE:
307: i++;
308: break;
309:
310: case RBRACE:
311: if (i) {
312: i--;
313: break;
314: }
315: /* FALLTHROUGH */
316: case COMMA:
317: if (i && *pm == COMMA)
318: break;
319: else {
320: /* Append the current string */
321: for (lm = ls; (pl < pm); *lm++ = *pl++)
322: continue;
323: /*
324: * Append the rest of the pattern after the
325: * closing brace
326: */
327: for (pl = pe + 1; (*lm++ = *pl++) != EOS;)
328: continue;
329:
330: /* Expand the current pattern */
331: #ifdef DEBUG
332: qprintf("globexp2:", patbuf);
333: #endif
334: *rv = globexp1(patbuf, pglob);
335:
336: /* move after the comma, to the next string */
337: pl = pm + 1;
338: }
339: break;
340:
341: default:
342: break;
343: }
344: }
345: *rv = 0;
346: return 0;
347: }
348:
349:
350:
351: /*
352: * expand tilde from the passwd file.
353: */
354: static const Char *
1.18 ! christos 355: globtilde(const Char *pattern, Char *patbuf, size_t patsize, glob_t *pglob)
1.12 christos 356: {
357: struct passwd *pwd;
358: const char *h;
359: const Char *p;
360: Char *b;
361: char *d;
362: Char *pend = &patbuf[patsize / sizeof(Char)];
363: #ifndef NO_GETPW_R
364: struct passwd pwres;
365: char pwbuf[1024];
366: #endif
367:
368: pend--;
369:
370: _DIAGASSERT(pattern != NULL);
371: _DIAGASSERT(patbuf != NULL);
372: _DIAGASSERT(pglob != NULL);
373:
374: if (*pattern != TILDE || !(pglob->gl_flags & GLOB_TILDE))
375: return pattern;
376:
377: /* Copy up to the end of the string or / */
378: for (p = pattern + 1, d = (char *)(void *)patbuf;
379: d < (char *)(void *)pend && *p && *p != SLASH;
380: *d++ = *p++)
381: continue;
382:
383: if (d == (char *)(void *)pend)
384: return NULL;
385:
386: *d = EOS;
387: d = (char *)(void *)patbuf;
388:
389: if (*d == EOS) {
390: /*
391: * handle a plain ~ or ~/ by expanding $HOME
392: * first and then trying the password file
393: */
394: if ((h = getenv("HOME")) == NULL) {
395: #ifdef NO_GETPW_R
396: if ((pwd = getpwuid(getuid())) == NULL)
397: #else
398: if (getpwuid_r(getuid(), &pwres, pwbuf, sizeof(pwbuf),
399: &pwd) != 0 || pwd == NULL)
400: #endif
401: return pattern;
402: else
403: h = pwd->pw_dir;
404: }
405: }
406: else {
407: /*
408: * Expand a ~user
409: */
410: #ifdef NO_GETPW_R
411: if ((pwd = getpwnam(d)) == NULL)
412: #else
413: if (getpwnam_r(d, &pwres, pwbuf, sizeof(pwbuf), &pwd) != 0 ||
414: pwd == NULL)
415: #endif
416: return pattern;
417: else
418: h = pwd->pw_dir;
419: }
420:
421: /* Copy the home directory */
422: for (b = patbuf; b < pend && *h; *b++ = *h++)
423: continue;
424:
425: if (b == pend)
426: return NULL;
427:
428: /* Append the rest of the pattern */
429: while (b < pend && (*b++ = *p++) != EOS)
430: continue;
431:
432: if (b == pend)
433: return NULL;
434:
435: return patbuf;
436: }
437:
438:
439: /*
440: * The main glob() routine: compiles the pattern (optionally processing
441: * quotes), calls glob1() to do the real pattern matching, and finally
442: * sorts the list (unless unsorted operation is requested). Returns 0
443: * if things went well, nonzero if errors occurred. It is not an error
444: * to find no matches.
445: */
446: static int
1.18 ! christos 447: glob0(const Char *pattern, glob_t *pglob)
1.12 christos 448: {
449: const Char *qpatnext;
1.16 christos 450: int c, error;
451: __gl_size_t oldpathc;
1.12 christos 452: Char *bufnext, patbuf[MAXPATHLEN+1];
453: size_t limit = 0;
454:
455: _DIAGASSERT(pattern != NULL);
456: _DIAGASSERT(pglob != NULL);
457:
458: if ((qpatnext = globtilde(pattern, patbuf, sizeof(patbuf),
459: pglob)) == NULL)
460: return GLOB_ABEND;
461: oldpathc = pglob->gl_pathc;
462: bufnext = patbuf;
463:
464: /* We don't need to check for buffer overflow any more. */
465: while ((c = *qpatnext++) != EOS) {
466: switch (c) {
467: case LBRACKET:
468: c = *qpatnext;
469: if (c == NOT)
470: ++qpatnext;
471: if (*qpatnext == EOS ||
472: g_strchr(qpatnext+1, RBRACKET) == NULL) {
473: *bufnext++ = LBRACKET;
474: if (c == NOT)
475: --qpatnext;
476: break;
477: }
478: *bufnext++ = M_SET;
479: if (c == NOT)
480: *bufnext++ = M_NOT;
481: c = *qpatnext++;
482: do {
483: *bufnext++ = CHAR(c);
484: if (*qpatnext == RANGE &&
485: (c = qpatnext[1]) != RBRACKET) {
486: *bufnext++ = M_RNG;
487: *bufnext++ = CHAR(c);
488: qpatnext += 2;
489: }
490: } while ((c = *qpatnext++) != RBRACKET);
491: pglob->gl_flags |= GLOB_MAGCHAR;
492: *bufnext++ = M_END;
493: break;
494: case QUESTION:
495: pglob->gl_flags |= GLOB_MAGCHAR;
496: *bufnext++ = M_ONE;
497: break;
498: case STAR:
499: pglob->gl_flags |= GLOB_MAGCHAR;
500: /* collapse adjacent stars to one,
501: * to avoid exponential behavior
502: */
503: if (bufnext == patbuf || bufnext[-1] != M_ALL)
504: *bufnext++ = M_ALL;
505: break;
506: default:
507: *bufnext++ = CHAR(c);
508: break;
509: }
510: }
511: *bufnext = EOS;
512: #ifdef DEBUG
513: qprintf("glob0:", patbuf);
514: #endif
515:
516: if ((error = glob1(patbuf, pglob, &limit)) != 0)
1.18 ! christos 517: return error;
1.12 christos 518:
519: if (pglob->gl_pathc == oldpathc) {
520: /*
521: * If there was no match we are going to append the pattern
522: * if GLOB_NOCHECK was specified or if GLOB_NOMAGIC was
523: * specified and the pattern did not contain any magic
524: * characters GLOB_NOMAGIC is there just for compatibility
525: * with csh.
526: */
527: if ((pglob->gl_flags & GLOB_NOCHECK) ||
528: ((pglob->gl_flags & (GLOB_NOMAGIC|GLOB_MAGCHAR))
529: == GLOB_NOMAGIC)) {
530: return globextend(pattern, pglob, &limit);
531: } else {
1.18 ! christos 532: return GLOB_NOMATCH;
1.12 christos 533: }
534: } else if (!(pglob->gl_flags & GLOB_NOSORT)) {
535: qsort(pglob->gl_pathv + pglob->gl_offs + oldpathc,
536: (size_t)pglob->gl_pathc - oldpathc, sizeof(char *),
537: compare);
538: }
539:
1.18 ! christos 540: return 0;
1.12 christos 541: }
542:
543: static int
1.18 ! christos 544: compare(const void *p, const void *q)
1.12 christos 545: {
546:
547: _DIAGASSERT(p != NULL);
548: _DIAGASSERT(q != NULL);
549:
1.18 ! christos 550: return strcoll(*(const char * const *)p, *(const char * const *)q);
1.12 christos 551: }
552:
553: static int
1.18 ! christos 554: glob1(Char *pattern, glob_t *pglob, size_t *limit)
1.12 christos 555: {
556: Char pathbuf[MAXPATHLEN+1];
557:
558: _DIAGASSERT(pattern != NULL);
559: _DIAGASSERT(pglob != NULL);
560:
561: /* A null pathname is invalid -- POSIX 1003.1 sect. 2.4. */
562: if (*pattern == EOS)
1.18 ! christos 563: return 0;
1.12 christos 564: /*
565: * we save one character so that we can use ptr >= limit,
566: * in the general case when we are appending non nul chars only.
567: */
1.18 ! christos 568: return glob2(pathbuf, pathbuf,
! 569: pathbuf + (sizeof(pathbuf) / sizeof(*pathbuf)) - 1, pattern,
! 570: pglob, limit);
1.12 christos 571: }
572:
573: /*
574: * The functions glob2 and glob3 are mutually recursive; there is one level
575: * of recursion for each segment in the pattern that contains one or more
576: * meta characters.
577: */
578: static int
1.18 ! christos 579: glob2(Char *pathbuf, Char *pathend, Char *pathlim, Char *pattern, glob_t *pglob,
! 580: size_t *limit)
1.12 christos 581: {
582: __gl_stat_t sb;
583: Char *p, *q;
584: int anymeta;
585:
586: _DIAGASSERT(pathbuf != NULL);
587: _DIAGASSERT(pathend != NULL);
588: _DIAGASSERT(pattern != NULL);
589: _DIAGASSERT(pglob != NULL);
590:
591: /*
592: * Loop over pattern segments until end of pattern or until
593: * segment with meta character found.
594: */
595: for (anymeta = 0;;) {
596: if (*pattern == EOS) { /* End of pattern? */
597: *pathend = EOS;
598: if (g_lstat(pathbuf, &sb, pglob))
1.18 ! christos 599: return 0;
1.12 christos 600:
601: if (((pglob->gl_flags & GLOB_MARK) &&
602: pathend[-1] != SEP) && (S_ISDIR(sb.st_mode) ||
603: (S_ISLNK(sb.st_mode) &&
604: (g_stat(pathbuf, &sb, pglob) == 0) &&
605: S_ISDIR(sb.st_mode)))) {
606: if (pathend >= pathlim)
1.18 ! christos 607: return GLOB_ABORTED;
1.12 christos 608: *pathend++ = SEP;
609: *pathend = EOS;
610: }
611: ++pglob->gl_matchc;
1.18 ! christos 612: return globextend(pathbuf, pglob, limit);
1.12 christos 613: }
614:
615: /* Find end of next segment, copy tentatively to pathend. */
616: q = pathend;
617: p = pattern;
618: while (*p != EOS && *p != SEP) {
619: if (ismeta(*p))
620: anymeta = 1;
621: if (q >= pathlim)
622: return GLOB_ABORTED;
623: *q++ = *p++;
624: }
625:
626: if (!anymeta) { /* No expansion, do next segment. */
627: pathend = q;
628: pattern = p;
629: while (*pattern == SEP) {
630: if (pathend >= pathlim)
631: return GLOB_ABORTED;
632: *pathend++ = *pattern++;
633: }
634: } else /* Need expansion, recurse. */
1.18 ! christos 635: return glob3(pathbuf, pathend, pathlim, pattern, p,
! 636: pglob, limit);
1.12 christos 637: }
638: /* NOTREACHED */
639: }
640:
641: static int
1.18 ! christos 642: glob3(Char *pathbuf, Char *pathend, Char *pathlim, Char *pattern,
! 643: Char *restpattern, glob_t *pglob, size_t *limit)
1.12 christos 644: {
645: struct dirent *dp;
646: DIR *dirp;
647: int error;
648: char buf[MAXPATHLEN];
649:
650: /*
651: * The readdirfunc declaration can't be prototyped, because it is
652: * assigned, below, to two functions which are prototyped in glob.h
653: * and dirent.h as taking pointers to differently typed opaque
654: * structures.
655: */
1.18 ! christos 656: struct dirent *(*readdirfunc)(void *);
1.12 christos 657:
658: _DIAGASSERT(pathbuf != NULL);
659: _DIAGASSERT(pathend != NULL);
660: _DIAGASSERT(pattern != NULL);
661: _DIAGASSERT(restpattern != NULL);
662: _DIAGASSERT(pglob != NULL);
663:
664: *pathend = EOS;
665: errno = 0;
666:
667: if ((dirp = g_opendir(pathbuf, pglob)) == NULL) {
668: if (pglob->gl_errfunc) {
669: if (g_Ctoc(pathbuf, buf, sizeof(buf)))
1.18 ! christos 670: return GLOB_ABORTED;
1.12 christos 671: if (pglob->gl_errfunc(buf, errno) ||
672: pglob->gl_flags & GLOB_ERR)
1.18 ! christos 673: return GLOB_ABORTED;
1.12 christos 674: }
675: /*
676: * Posix/XOpen: glob should return when it encounters a
677: * directory that it cannot open or read
678: * XXX: Should we ignore ENOTDIR and ENOENT though?
679: * I think that Posix had in mind EPERM...
680: */
681: if (pglob->gl_flags & GLOB_ERR)
1.18 ! christos 682: return GLOB_ABORTED;
1.12 christos 683:
1.18 ! christos 684: return 0;
1.12 christos 685: }
686:
687: error = 0;
688:
689: /* Search directory for matching names. */
690: if (pglob->gl_flags & GLOB_ALTDIRFUNC)
691: readdirfunc = pglob->gl_readdir;
692: else
693: readdirfunc = (struct dirent *(*)__P((void *))) readdir;
694: while ((dp = (*readdirfunc)(dirp)) != NULL) {
695: u_char *sc;
696: Char *dc;
697:
698: /* Initial DOT must be matched literally. */
699: if (dp->d_name[0] == DOT && *pattern != DOT)
700: continue;
701: /*
702: * The resulting string contains EOS, so we can
703: * use the pathlim character, if it is the nul
704: */
705: for (sc = (u_char *) dp->d_name, dc = pathend;
706: dc <= pathlim && (*dc++ = *sc++) != EOS;)
707: continue;
708:
709: /*
710: * Have we filled the buffer without seeing EOS?
711: */
712: if (dc > pathlim && *pathlim != EOS) {
713: /*
714: * Abort when requested by caller, otherwise
715: * reset pathend back to last SEP and continue
716: * with next dir entry.
717: */
718: if (pglob->gl_flags & GLOB_ERR) {
719: error = GLOB_ABORTED;
720: break;
721: }
722: else {
723: *pathend = EOS;
724: continue;
725: }
726: }
727:
728: if (!match(pathend, pattern, restpattern)) {
729: *pathend = EOS;
730: continue;
731: }
732: error = glob2(pathbuf, --dc, pathlim, restpattern, pglob, limit);
733: if (error)
734: break;
735: }
736:
737: if (pglob->gl_flags & GLOB_ALTDIRFUNC)
738: (*pglob->gl_closedir)(dirp);
739: else
740: closedir(dirp);
741:
742: /*
743: * Again Posix X/Open issue with regards to error handling.
744: */
745: if ((error || errno) && (pglob->gl_flags & GLOB_ERR))
1.18 ! christos 746: return GLOB_ABORTED;
1.12 christos 747:
1.18 ! christos 748: return error;
1.12 christos 749: }
750:
751:
752: /*
1.17 christos 753: * Extend the gl_pathv member of a glob_t structure to accommodate a new item,
1.12 christos 754: * add the new item, and update gl_pathc.
755: *
756: * This assumes the BSD realloc, which only copies the block when its size
757: * crosses a power-of-two boundary; for v7 realloc, this would cause quadratic
758: * behavior.
759: *
760: * Return 0 if new item added, error code if memory couldn't be allocated.
761: *
762: * Invariant of the glob_t structure:
763: * Either gl_pathc is zero and gl_pathv is NULL; or gl_pathc > 0 and
764: * gl_pathv points to (gl_offs + gl_pathc + 1) items.
765: */
766: static int
1.18 ! christos 767: globextend(const Char *path, glob_t *pglob, size_t *limit)
1.12 christos 768: {
769: char **pathv;
1.16 christos 770: size_t i, newsize, len;
1.12 christos 771: char *copy;
772: const Char *p;
773:
774: _DIAGASSERT(path != NULL);
775: _DIAGASSERT(pglob != NULL);
776:
777: newsize = sizeof(*pathv) * (2 + pglob->gl_pathc + pglob->gl_offs);
778: pathv = pglob->gl_pathv ? realloc(pglob->gl_pathv, newsize) :
779: malloc(newsize);
780: if (pathv == NULL)
1.18 ! christos 781: return GLOB_NOSPACE;
1.12 christos 782:
783: if (pglob->gl_pathv == NULL && pglob->gl_offs > 0) {
784: /* first time around -- clear initial gl_offs items */
785: pathv += pglob->gl_offs;
1.16 christos 786: for (i = pglob->gl_offs + 1; --i > 0; )
1.12 christos 787: *--pathv = NULL;
788: }
789: pglob->gl_pathv = pathv;
790:
791: for (p = path; *p++;)
792: continue;
793: len = (size_t)(p - path);
794: *limit += len;
795: if ((copy = malloc(len)) != NULL) {
796: if (g_Ctoc(path, copy, len)) {
797: free(copy);
1.18 ! christos 798: return GLOB_ABORTED;
1.12 christos 799: }
800: pathv[pglob->gl_offs + pglob->gl_pathc++] = copy;
801: }
802: pathv[pglob->gl_offs + pglob->gl_pathc] = NULL;
803:
804: if ((pglob->gl_flags & GLOB_LIMIT) && (newsize + *limit) >= ARG_MAX) {
805: errno = 0;
1.18 ! christos 806: return GLOB_NOSPACE;
1.12 christos 807: }
808:
1.18 ! christos 809: return copy == NULL ? GLOB_NOSPACE : 0;
1.12 christos 810: }
811:
812:
813: /*
814: * pattern matching function for filenames. Each occurrence of the *
815: * pattern causes a recursion level.
816: */
817: static int
1.18 ! christos 818: match(Char *name, Char *pat, Char *patend)
1.12 christos 819: {
820: int ok, negate_range;
821: Char c, k;
822:
823: _DIAGASSERT(name != NULL);
824: _DIAGASSERT(pat != NULL);
825: _DIAGASSERT(patend != NULL);
826:
827: while (pat < patend) {
828: c = *pat++;
829: switch (c & M_MASK) {
830: case M_ALL:
831: if (pat == patend)
1.18 ! christos 832: return 1;
1.12 christos 833: do
834: if (match(name, pat, patend))
1.18 ! christos 835: return 1;
1.12 christos 836: while (*name++ != EOS);
1.18 ! christos 837: return 0;
1.12 christos 838: case M_ONE:
839: if (*name++ == EOS)
1.18 ! christos 840: return 0;
1.12 christos 841: break;
842: case M_SET:
843: ok = 0;
844: if ((k = *name++) == EOS)
1.18 ! christos 845: return 0;
1.12 christos 846: if ((negate_range = ((*pat & M_MASK) == M_NOT)) != EOS)
847: ++pat;
848: while (((c = *pat++) & M_MASK) != M_END)
849: if ((*pat & M_MASK) == M_RNG) {
850: if (c <= k && k <= pat[1])
851: ok = 1;
852: pat += 2;
853: } else if (c == k)
854: ok = 1;
855: if (ok == negate_range)
1.18 ! christos 856: return 0;
1.12 christos 857: break;
858: default:
859: if (*name++ != c)
1.18 ! christos 860: return 0;
1.12 christos 861: break;
862: }
863: }
1.18 ! christos 864: return *name == EOS;
1.12 christos 865: }
866:
867: /* Free allocated data belonging to a glob_t structure. */
868: void
1.18 ! christos 869: globfree(glob_t *pglob)
1.12 christos 870: {
1.16 christos 871: size_t i;
1.12 christos 872: char **pp;
873:
874: _DIAGASSERT(pglob != NULL);
875:
876: if (pglob->gl_pathv != NULL) {
877: pp = pglob->gl_pathv + pglob->gl_offs;
878: for (i = pglob->gl_pathc; i--; ++pp)
879: if (*pp)
880: free(*pp);
881: free(pglob->gl_pathv);
882: pglob->gl_pathv = NULL;
883: pglob->gl_pathc = 0;
884: }
885: }
886:
887: static DIR *
1.18 ! christos 888: g_opendir(Char *str, glob_t *pglob)
1.12 christos 889: {
890: char buf[MAXPATHLEN];
891:
892: _DIAGASSERT(str != NULL);
893: _DIAGASSERT(pglob != NULL);
894:
895: if (!*str)
896: (void)strlcpy(buf, ".", sizeof(buf));
897: else {
898: if (g_Ctoc(str, buf, sizeof(buf)))
899: return NULL;
900: }
901:
902: if (pglob->gl_flags & GLOB_ALTDIRFUNC)
1.18 ! christos 903: return (*pglob->gl_opendir)(buf);
1.12 christos 904:
1.18 ! christos 905: return opendir(buf);
1.12 christos 906: }
907:
908: static int
1.18 ! christos 909: g_lstat(Char *fn, __gl_stat_t *sb, glob_t *pglob)
1.12 christos 910: {
911: char buf[MAXPATHLEN];
912:
913: _DIAGASSERT(fn != NULL);
914: _DIAGASSERT(sb != NULL);
915: _DIAGASSERT(pglob != NULL);
916:
917: if (g_Ctoc(fn, buf, sizeof(buf)))
918: return -1;
919: if (pglob->gl_flags & GLOB_ALTDIRFUNC)
1.18 ! christos 920: return (*pglob->gl_lstat)(buf, sb);
! 921: return lstat(buf, sb);
1.12 christos 922: }
923:
924: static int
1.18 ! christos 925: g_stat(Char *fn, __gl_stat_t *sb, glob_t *pglob)
1.12 christos 926: {
927: char buf[MAXPATHLEN];
928:
929: _DIAGASSERT(fn != NULL);
930: _DIAGASSERT(sb != NULL);
931: _DIAGASSERT(pglob != NULL);
932:
933: if (g_Ctoc(fn, buf, sizeof(buf)))
934: return -1;
935: if (pglob->gl_flags & GLOB_ALTDIRFUNC)
1.18 ! christos 936: return (*pglob->gl_stat)(buf, sb);
! 937: return stat(buf, sb);
1.12 christos 938: }
939:
940: static Char *
1.18 ! christos 941: g_strchr(const Char *str, int ch)
1.12 christos 942: {
943:
944: _DIAGASSERT(str != NULL);
945:
946: do {
947: if (*str == ch)
1.14 christos 948: return __UNCONST(str);
1.12 christos 949: } while (*str++);
950: return NULL;
951: }
952:
953: static int
1.18 ! christos 954: g_Ctoc(const Char *str, char *buf, size_t len)
1.12 christos 955: {
956: char *dc;
957:
958: _DIAGASSERT(str != NULL);
959: _DIAGASSERT(buf != NULL);
960:
961: if (len == 0)
962: return 1;
963:
964: for (dc = buf; len && (*dc++ = *str++) != EOS; len--)
965: continue;
966:
967: return len == 0;
968: }
969:
970: #ifdef DEBUG
971: static void
1.18 ! christos 972: qprintf(const char *str, Char *s)
1.12 christos 973: {
974: Char *p;
975:
976: _DIAGASSERT(str != NULL);
977: _DIAGASSERT(s != NULL);
978:
979: (void)printf("%s:\n", str);
980: for (p = s; *p; p++)
981: (void)printf("%c", CHAR(*p));
982: (void)printf("\n");
983: for (p = s; *p; p++)
984: (void)printf("%c", *p & M_PROTECT ? '"' : ' ');
985: (void)printf("\n");
986: for (p = s; *p; p++)
987: (void)printf("%c", ismeta(*p) ? '_' : ' ');
988: (void)printf("\n");
989: }
990: #endif
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