Annotation of src/lib/libc/gen/glob.c, Revision 1.27
1.27 ! christos 1: /* $NetBSD: glob.c,v 1.26 2010/07/06 14:59:22 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
1.27 ! christos 40: __RCSID("$NetBSD: glob.c,v 1.26 2010/07/06 14:59:22 christos Exp $");
1.12 christos 41: #endif
42: #endif /* LIBC_SCCS and not lint */
1.1 cgd 43:
1.12 christos 44: /*
45: * glob(3) -- a superset of the one defined in POSIX 1003.2.
46: *
47: * The [!...] convention to negate a range is supported (SysV, Posix, ksh).
48: *
49: * Optional extra services, controlled by flags not defined by POSIX:
50: *
51: * GLOB_MAGCHAR:
52: * Set in gl_flags if pattern contained a globbing character.
53: * GLOB_NOMAGIC:
54: * Same as GLOB_NOCHECK, but it will only append pattern if it did
55: * not contain any magic characters. [Used in csh style globbing]
56: * GLOB_ALTDIRFUNC:
57: * Use alternately specified directory access functions.
58: * GLOB_TILDE:
59: * expand ~user/foo to the /home/dir/of/user/foo
60: * GLOB_BRACE:
61: * expand {1,2}{a,b} to 1a 1b 2a 2b
1.19 christos 62: * GLOB_PERIOD:
63: * allow metacharacters to match leading dots in filenames.
1.22 christos 64: * GLOB_NO_DOTDIRS:
65: * . and .. are hidden from wildcards, even if GLOB_PERIOD is set.
1.12 christos 66: * gl_matchc:
67: * Number of matches in the current invocation of glob.
68: */
69:
70: #include "namespace.h"
71: #include <sys/param.h>
72: #include <sys/stat.h>
73:
74: #include <assert.h>
75: #include <ctype.h>
76: #include <dirent.h>
77: #include <errno.h>
78: #include <glob.h>
79: #include <pwd.h>
80: #include <stdio.h>
1.21 christos 81: #include <stddef.h>
1.12 christos 82: #include <stdlib.h>
83: #include <string.h>
84: #include <unistd.h>
85:
86: #ifdef HAVE_NBTOOL_CONFIG_H
87: #define NO_GETPW_R
88: #endif
89:
1.26 christos 90: #define GLOB_LIMIT_MALLOC 65536
91: #define GLOB_LIMIT_STAT 128
92: #define GLOB_LIMIT_READDIR 16384
93:
94: #define GLOB_INDEX_MALLOC 0
95: #define GLOB_INDEX_STAT 1
96: #define GLOB_INDEX_READDIR 2
1.23 ad 97:
1.12 christos 98: /*
99: * XXX: For NetBSD 1.4.x compatibility. (kill me l8r)
100: */
101: #ifndef _DIAGASSERT
102: #define _DIAGASSERT(a)
103: #endif
104:
105: #define DOLLAR '$'
106: #define DOT '.'
107: #define EOS '\0'
108: #define LBRACKET '['
109: #define NOT '!'
110: #define QUESTION '?'
111: #define QUOTE '\\'
112: #define RANGE '-'
113: #define RBRACKET ']'
114: #define SEP '/'
115: #define STAR '*'
116: #define TILDE '~'
117: #define UNDERSCORE '_'
118: #define LBRACE '{'
119: #define RBRACE '}'
120: #define SLASH '/'
121: #define COMMA ','
122:
1.15 christos 123: #ifndef USE_8BIT_CHARS
1.12 christos 124:
125: #define M_QUOTE 0x8000
126: #define M_PROTECT 0x4000
127: #define M_MASK 0xffff
128: #define M_ASCII 0x00ff
129:
130: typedef u_short Char;
131:
132: #else
133:
1.15 christos 134: #define M_QUOTE (Char)0x80
135: #define M_PROTECT (Char)0x40
136: #define M_MASK (Char)0xff
137: #define M_ASCII (Char)0x7f
1.12 christos 138:
139: typedef char Char;
140:
141: #endif
142:
143:
144: #define CHAR(c) ((Char)((c)&M_ASCII))
145: #define META(c) ((Char)((c)|M_QUOTE))
146: #define M_ALL META('*')
147: #define M_END META(']')
148: #define M_NOT META('!')
149: #define M_ONE META('?')
150: #define M_RNG META('-')
151: #define M_SET META('[')
152: #define ismeta(c) (((c)&M_QUOTE) != 0)
153:
154:
1.18 christos 155: static int compare(const void *, const void *);
156: static int g_Ctoc(const Char *, char *, size_t);
157: static int g_lstat(Char *, __gl_stat_t *, glob_t *);
158: static DIR *g_opendir(Char *, glob_t *);
159: static Char *g_strchr(const Char *, int);
160: static int g_stat(Char *, __gl_stat_t *, glob_t *);
1.25 christos 161: static int glob0(const Char *, glob_t *, size_t *);
1.18 christos 162: static int glob1(Char *, glob_t *, size_t *);
1.27 ! christos 163: static int glob2(Char *, Char *, Char *, const Char *, glob_t *,
1.18 christos 164: size_t *);
1.27 ! christos 165: static int glob3(Char *, Char *, Char *, const Char *, const Char *,
! 166: const Char *, glob_t *, size_t *);
1.18 christos 167: static int globextend(const Char *, glob_t *, size_t *);
168: static const Char *globtilde(const Char *, Char *, size_t, glob_t *);
1.25 christos 169: static int globexp1(const Char *, glob_t *, size_t *);
170: static int globexp2(const Char *, const Char *, glob_t *, int *,
171: size_t *);
1.27 ! christos 172: static int match(const Char *, const Char *, const Char *);
1.12 christos 173: #ifdef DEBUG
1.18 christos 174: static void qprintf(const char *, Char *);
1.12 christos 175: #endif
176:
177: int
1.18 christos 178: glob(const char *pattern, int flags, int (*errfunc)(const char *, int),
179: glob_t *pglob)
1.12 christos 180: {
181: const u_char *patnext;
182: int c;
183: Char *bufnext, *bufend, patbuf[MAXPATHLEN+1];
1.26 christos 184: /* 0 = malloc(), 1 = stat(), 2 = readdir() */
185: size_t limit[] = { 0, 0, 0 };
1.12 christos 186:
187: _DIAGASSERT(pattern != NULL);
188:
189: patnext = (const u_char *) pattern;
190: if (!(flags & GLOB_APPEND)) {
191: pglob->gl_pathc = 0;
192: pglob->gl_pathv = NULL;
193: if (!(flags & GLOB_DOOFFS))
194: pglob->gl_offs = 0;
195: }
196: pglob->gl_flags = flags & ~GLOB_MAGCHAR;
197: pglob->gl_errfunc = errfunc;
198: pglob->gl_matchc = 0;
199:
200: bufnext = patbuf;
201: bufend = bufnext + MAXPATHLEN;
202: if (flags & GLOB_NOESCAPE) {
203: while (bufnext < bufend && (c = *patnext++) != EOS)
204: *bufnext++ = c;
205: } else {
206: /* Protect the quoted characters. */
207: while (bufnext < bufend && (c = *patnext++) != EOS)
208: if (c == QUOTE) {
209: if ((c = *patnext++) == EOS) {
210: c = QUOTE;
211: --patnext;
212: }
213: *bufnext++ = c | M_PROTECT;
214: }
215: else
216: *bufnext++ = c;
217: }
218: *bufnext = EOS;
219:
220: if (flags & GLOB_BRACE)
1.26 christos 221: return globexp1(patbuf, pglob, limit);
1.12 christos 222: else
1.26 christos 223: return glob0(patbuf, pglob, limit);
1.12 christos 224: }
225:
226: /*
227: * Expand recursively a glob {} pattern. When there is no more expansion
228: * invoke the standard globbing routine to glob the rest of the magic
229: * characters
230: */
231: static int
1.25 christos 232: globexp1(const Char *pattern, glob_t *pglob, size_t *limit)
1.12 christos 233: {
234: const Char* ptr = pattern;
235: int rv;
236:
237: _DIAGASSERT(pattern != NULL);
238: _DIAGASSERT(pglob != NULL);
239:
240: /* Protect a single {}, for find(1), like csh */
241: if (pattern[0] == LBRACE && pattern[1] == RBRACE && pattern[2] == EOS)
1.25 christos 242: return glob0(pattern, pglob, limit);
1.12 christos 243:
244: while ((ptr = (const Char *) g_strchr(ptr, LBRACE)) != NULL)
1.25 christos 245: if (!globexp2(ptr, pattern, pglob, &rv, limit))
1.12 christos 246: return rv;
247:
1.25 christos 248: return glob0(pattern, pglob, limit);
1.12 christos 249: }
250:
251:
252: /*
253: * Recursive brace globbing helper. Tries to expand a single brace.
254: * If it succeeds then it invokes globexp1 with the new pattern.
255: * If it fails then it tries to glob the rest of the pattern and returns.
256: */
257: static int
1.25 christos 258: globexp2(const Char *ptr, const Char *pattern, glob_t *pglob, int *rv,
259: size_t *limit)
1.12 christos 260: {
261: int i;
262: Char *lm, *ls;
263: const Char *pe, *pm, *pl;
264: Char patbuf[MAXPATHLEN + 1];
265:
266: _DIAGASSERT(ptr != NULL);
267: _DIAGASSERT(pattern != NULL);
268: _DIAGASSERT(pglob != NULL);
269: _DIAGASSERT(rv != NULL);
270:
271: /* copy part up to the brace */
272: for (lm = patbuf, pm = pattern; pm != ptr; *lm++ = *pm++)
273: continue;
274: ls = lm;
275:
276: /* Find the balanced brace */
277: for (i = 0, pe = ++ptr; *pe; pe++)
278: if (*pe == LBRACKET) {
279: /* Ignore everything between [] */
280: for (pm = pe++; *pe != RBRACKET && *pe != EOS; pe++)
281: continue;
282: if (*pe == EOS) {
283: /*
284: * We could not find a matching RBRACKET.
285: * Ignore and just look for RBRACE
286: */
287: pe = pm;
288: }
289: }
290: else if (*pe == LBRACE)
291: i++;
292: else if (*pe == RBRACE) {
293: if (i == 0)
294: break;
295: i--;
296: }
297:
298: /* Non matching braces; just glob the pattern */
299: if (i != 0 || *pe == EOS) {
300: /*
301: * we use `pattern', not `patbuf' here so that that
302: * unbalanced braces are passed to the match
303: */
1.25 christos 304: *rv = glob0(pattern, pglob, limit);
1.12 christos 305: return 0;
306: }
307:
308: for (i = 0, pl = pm = ptr; pm <= pe; pm++) {
309: switch (*pm) {
310: case LBRACKET:
311: /* Ignore everything between [] */
312: for (pl = pm++; *pm != RBRACKET && *pm != EOS; pm++)
313: continue;
314: if (*pm == EOS) {
315: /*
316: * We could not find a matching RBRACKET.
317: * Ignore and just look for RBRACE
318: */
319: pm = pl;
320: }
321: break;
322:
323: case LBRACE:
324: i++;
325: break;
326:
327: case RBRACE:
328: if (i) {
329: i--;
330: break;
331: }
332: /* FALLTHROUGH */
333: case COMMA:
334: if (i && *pm == COMMA)
335: break;
336: else {
337: /* Append the current string */
338: for (lm = ls; (pl < pm); *lm++ = *pl++)
339: continue;
340: /*
341: * Append the rest of the pattern after the
342: * closing brace
343: */
344: for (pl = pe + 1; (*lm++ = *pl++) != EOS;)
345: continue;
346:
347: /* Expand the current pattern */
348: #ifdef DEBUG
1.27 ! christos 349: qprintf("globexp2", patbuf);
1.12 christos 350: #endif
1.25 christos 351: *rv = globexp1(patbuf, pglob, limit);
1.12 christos 352:
353: /* move after the comma, to the next string */
354: pl = pm + 1;
355: }
356: break;
357:
358: default:
359: break;
360: }
361: }
362: *rv = 0;
363: return 0;
364: }
365:
366:
367:
368: /*
369: * expand tilde from the passwd file.
370: */
371: static const Char *
1.18 christos 372: globtilde(const Char *pattern, Char *patbuf, size_t patsize, glob_t *pglob)
1.12 christos 373: {
374: struct passwd *pwd;
375: const char *h;
376: const Char *p;
377: Char *b;
378: char *d;
379: Char *pend = &patbuf[patsize / sizeof(Char)];
380: #ifndef NO_GETPW_R
381: struct passwd pwres;
382: char pwbuf[1024];
383: #endif
384:
385: pend--;
386:
387: _DIAGASSERT(pattern != NULL);
388: _DIAGASSERT(patbuf != NULL);
389: _DIAGASSERT(pglob != NULL);
390:
391: if (*pattern != TILDE || !(pglob->gl_flags & GLOB_TILDE))
392: return pattern;
393:
394: /* Copy up to the end of the string or / */
395: for (p = pattern + 1, d = (char *)(void *)patbuf;
396: d < (char *)(void *)pend && *p && *p != SLASH;
397: *d++ = *p++)
398: continue;
399:
400: if (d == (char *)(void *)pend)
401: return NULL;
402:
403: *d = EOS;
404: d = (char *)(void *)patbuf;
405:
406: if (*d == EOS) {
407: /*
408: * handle a plain ~ or ~/ by expanding $HOME
409: * first and then trying the password file
410: */
411: if ((h = getenv("HOME")) == NULL) {
412: #ifdef NO_GETPW_R
413: if ((pwd = getpwuid(getuid())) == NULL)
414: #else
415: if (getpwuid_r(getuid(), &pwres, pwbuf, sizeof(pwbuf),
416: &pwd) != 0 || pwd == NULL)
417: #endif
418: return pattern;
419: else
420: h = pwd->pw_dir;
421: }
422: }
423: else {
424: /*
425: * Expand a ~user
426: */
427: #ifdef NO_GETPW_R
428: if ((pwd = getpwnam(d)) == NULL)
429: #else
430: if (getpwnam_r(d, &pwres, pwbuf, sizeof(pwbuf), &pwd) != 0 ||
431: pwd == NULL)
432: #endif
433: return pattern;
434: else
435: h = pwd->pw_dir;
436: }
437:
438: /* Copy the home directory */
439: for (b = patbuf; b < pend && *h; *b++ = *h++)
440: continue;
441:
442: if (b == pend)
443: return NULL;
444:
445: /* Append the rest of the pattern */
446: while (b < pend && (*b++ = *p++) != EOS)
447: continue;
448:
449: if (b == pend)
450: return NULL;
451:
452: return patbuf;
453: }
454:
455:
456: /*
457: * The main glob() routine: compiles the pattern (optionally processing
458: * quotes), calls glob1() to do the real pattern matching, and finally
459: * sorts the list (unless unsorted operation is requested). Returns 0
460: * if things went well, nonzero if errors occurred. It is not an error
461: * to find no matches.
462: */
463: static int
1.25 christos 464: glob0(const Char *pattern, glob_t *pglob, size_t *limit)
1.12 christos 465: {
466: const Char *qpatnext;
1.16 christos 467: int c, error;
468: __gl_size_t oldpathc;
1.12 christos 469: Char *bufnext, patbuf[MAXPATHLEN+1];
470:
471: _DIAGASSERT(pattern != NULL);
472: _DIAGASSERT(pglob != NULL);
473:
474: if ((qpatnext = globtilde(pattern, patbuf, sizeof(patbuf),
475: pglob)) == NULL)
476: return GLOB_ABEND;
477: oldpathc = pglob->gl_pathc;
478: bufnext = patbuf;
479:
480: /* We don't need to check for buffer overflow any more. */
481: while ((c = *qpatnext++) != EOS) {
482: switch (c) {
483: case LBRACKET:
484: c = *qpatnext;
485: if (c == NOT)
486: ++qpatnext;
487: if (*qpatnext == EOS ||
488: g_strchr(qpatnext+1, RBRACKET) == NULL) {
489: *bufnext++ = LBRACKET;
490: if (c == NOT)
491: --qpatnext;
492: break;
493: }
494: *bufnext++ = M_SET;
495: if (c == NOT)
496: *bufnext++ = M_NOT;
497: c = *qpatnext++;
498: do {
499: *bufnext++ = CHAR(c);
500: if (*qpatnext == RANGE &&
501: (c = qpatnext[1]) != RBRACKET) {
502: *bufnext++ = M_RNG;
503: *bufnext++ = CHAR(c);
504: qpatnext += 2;
505: }
506: } while ((c = *qpatnext++) != RBRACKET);
507: pglob->gl_flags |= GLOB_MAGCHAR;
508: *bufnext++ = M_END;
509: break;
510: case QUESTION:
511: pglob->gl_flags |= GLOB_MAGCHAR;
512: *bufnext++ = M_ONE;
513: break;
514: case STAR:
515: pglob->gl_flags |= GLOB_MAGCHAR;
1.27 ! christos 516: /* collapse adjacent stars to one [or three if globstar]
1.12 christos 517: * to avoid exponential behavior
518: */
1.27 ! christos 519: if (bufnext == patbuf || bufnext[-1] != M_ALL ||
! 520: ((pglob->gl_flags & GLOB_STAR) != 0 &&
! 521: (bufnext - 1 == patbuf || bufnext[-2] != M_ALL ||
! 522: bufnext - 2 == patbuf || bufnext[-3] != M_ALL)))
1.12 christos 523: *bufnext++ = M_ALL;
524: break;
525: default:
526: *bufnext++ = CHAR(c);
527: break;
528: }
529: }
530: *bufnext = EOS;
531: #ifdef DEBUG
1.27 ! christos 532: qprintf("glob0", patbuf);
1.12 christos 533: #endif
534:
1.25 christos 535: if ((error = glob1(patbuf, pglob, limit)) != 0)
1.18 christos 536: return error;
1.12 christos 537:
538: if (pglob->gl_pathc == oldpathc) {
539: /*
540: * If there was no match we are going to append the pattern
541: * if GLOB_NOCHECK was specified or if GLOB_NOMAGIC was
542: * specified and the pattern did not contain any magic
543: * characters GLOB_NOMAGIC is there just for compatibility
544: * with csh.
545: */
546: if ((pglob->gl_flags & GLOB_NOCHECK) ||
547: ((pglob->gl_flags & (GLOB_NOMAGIC|GLOB_MAGCHAR))
548: == GLOB_NOMAGIC)) {
1.25 christos 549: return globextend(pattern, pglob, limit);
1.12 christos 550: } else {
1.18 christos 551: return GLOB_NOMATCH;
1.12 christos 552: }
553: } else if (!(pglob->gl_flags & GLOB_NOSORT)) {
554: qsort(pglob->gl_pathv + pglob->gl_offs + oldpathc,
555: (size_t)pglob->gl_pathc - oldpathc, sizeof(char *),
556: compare);
557: }
558:
1.18 christos 559: return 0;
1.12 christos 560: }
561:
562: static int
1.18 christos 563: compare(const void *p, const void *q)
1.12 christos 564: {
565:
566: _DIAGASSERT(p != NULL);
567: _DIAGASSERT(q != NULL);
568:
1.18 christos 569: return strcoll(*(const char * const *)p, *(const char * const *)q);
1.12 christos 570: }
571:
572: static int
1.18 christos 573: glob1(Char *pattern, glob_t *pglob, size_t *limit)
1.12 christos 574: {
575: Char pathbuf[MAXPATHLEN+1];
576:
577: _DIAGASSERT(pattern != NULL);
578: _DIAGASSERT(pglob != NULL);
579:
580: /* A null pathname is invalid -- POSIX 1003.1 sect. 2.4. */
581: if (*pattern == EOS)
1.18 christos 582: return 0;
1.12 christos 583: /*
584: * we save one character so that we can use ptr >= limit,
585: * in the general case when we are appending non nul chars only.
586: */
1.18 christos 587: return glob2(pathbuf, pathbuf,
588: pathbuf + (sizeof(pathbuf) / sizeof(*pathbuf)) - 1, pattern,
589: pglob, limit);
1.12 christos 590: }
591:
592: /*
593: * The functions glob2 and glob3 are mutually recursive; there is one level
594: * of recursion for each segment in the pattern that contains one or more
595: * meta characters.
596: */
597: static int
1.27 ! christos 598: glob2(Char *pathbuf, Char *pathend, Char *pathlim, const Char *pattern,
! 599: glob_t *pglob, size_t *limit)
1.12 christos 600: {
601: __gl_stat_t sb;
1.27 ! christos 602: const Char *p;
! 603: Char *q;
1.12 christos 604: int anymeta;
1.21 christos 605: Char *pend;
606: ptrdiff_t diff;
1.12 christos 607:
608: _DIAGASSERT(pathbuf != NULL);
609: _DIAGASSERT(pathend != NULL);
610: _DIAGASSERT(pattern != NULL);
611: _DIAGASSERT(pglob != NULL);
612:
1.27 ! christos 613: #ifdef DEBUG
! 614: qprintf("glob2", pathbuf);
! 615: #endif
1.12 christos 616: /*
617: * Loop over pattern segments until end of pattern or until
618: * segment with meta character found.
619: */
620: for (anymeta = 0;;) {
621: if (*pattern == EOS) { /* End of pattern? */
622: *pathend = EOS;
623: if (g_lstat(pathbuf, &sb, pglob))
1.18 christos 624: return 0;
1.12 christos 625:
1.26 christos 626: if ((pglob->gl_flags & GLOB_LIMIT) &&
627: limit[GLOB_INDEX_STAT]++ >= GLOB_LIMIT_STAT) {
628: errno = 0;
629: *pathend++ = SEP;
630: *pathend = EOS;
631: return GLOB_NOSPACE;
632: }
1.12 christos 633: if (((pglob->gl_flags & GLOB_MARK) &&
634: pathend[-1] != SEP) && (S_ISDIR(sb.st_mode) ||
635: (S_ISLNK(sb.st_mode) &&
636: (g_stat(pathbuf, &sb, pglob) == 0) &&
637: S_ISDIR(sb.st_mode)))) {
638: if (pathend >= pathlim)
1.18 christos 639: return GLOB_ABORTED;
1.12 christos 640: *pathend++ = SEP;
641: *pathend = EOS;
642: }
643: ++pglob->gl_matchc;
1.18 christos 644: return globextend(pathbuf, pglob, limit);
1.12 christos 645: }
646:
647: /* Find end of next segment, copy tentatively to pathend. */
648: q = pathend;
649: p = pattern;
650: while (*p != EOS && *p != SEP) {
651: if (ismeta(*p))
652: anymeta = 1;
653: if (q >= pathlim)
654: return GLOB_ABORTED;
655: *q++ = *p++;
656: }
657:
1.20 christos 658: /*
1.21 christos 659: * No expansion, or path ends in slash-dot shash-dot-dot,
1.20 christos 660: * do next segment.
661: */
1.21 christos 662: if (pglob->gl_flags & GLOB_PERIOD) {
663: for (pend = pathend; pend > pathbuf && pend[-1] == '/';
664: pend--)
665: continue;
666: diff = pend - pathbuf;
667: } else {
668: /* XXX: GCC */
669: diff = 0;
670: pend = pathend;
671: }
672:
673: if ((!anymeta) ||
674: ((pglob->gl_flags & GLOB_PERIOD) &&
675: (diff >= 1 && pend[-1] == DOT) &&
676: (diff >= 2 && (pend[-2] == SLASH || pend[-2] == DOT)) &&
677: (diff < 3 || pend[-3] == SLASH))) {
1.12 christos 678: pathend = q;
679: pattern = p;
680: while (*pattern == SEP) {
681: if (pathend >= pathlim)
682: return GLOB_ABORTED;
683: *pathend++ = *pattern++;
684: }
685: } else /* Need expansion, recurse. */
1.18 christos 686: return glob3(pathbuf, pathend, pathlim, pattern, p,
1.27 ! christos 687: pattern, pglob, limit);
1.12 christos 688: }
689: /* NOTREACHED */
690: }
691:
692: static int
1.27 ! christos 693: glob3(Char *pathbuf, Char *pathend, Char *pathlim, const Char *pattern,
! 694: const Char *restpattern, const Char *pglobstar, glob_t *pglob,
! 695: size_t *limit)
1.12 christos 696: {
697: struct dirent *dp;
698: DIR *dirp;
1.27 ! christos 699: __gl_stat_t sbuf;
1.12 christos 700: int error;
701: char buf[MAXPATHLEN];
1.27 ! christos 702: int globstar = 0;
! 703: int chase_symlinks = 0;
! 704: const Char *termstar = NULL;
1.12 christos 705:
706: /*
707: * The readdirfunc declaration can't be prototyped, because it is
708: * assigned, below, to two functions which are prototyped in glob.h
709: * and dirent.h as taking pointers to differently typed opaque
710: * structures.
711: */
1.18 christos 712: struct dirent *(*readdirfunc)(void *);
1.12 christos 713:
714: _DIAGASSERT(pathbuf != NULL);
715: _DIAGASSERT(pathend != NULL);
716: _DIAGASSERT(pattern != NULL);
717: _DIAGASSERT(restpattern != NULL);
718: _DIAGASSERT(pglob != NULL);
719:
720: *pathend = EOS;
721: errno = 0;
722:
1.27 ! christos 723: while (pglobstar < restpattern) {
! 724: if ((pglobstar[0] & M_MASK) == M_ALL &&
! 725: (pglobstar[1] & M_MASK) == M_ALL) {
! 726: globstar = 1;
! 727: chase_symlinks = (pglobstar[2] & M_MASK) == M_ALL;
! 728: termstar = pglobstar + (2 + chase_symlinks);
! 729: break;
! 730: }
! 731: pglobstar++;
! 732: }
! 733:
! 734: if (globstar) {
! 735: error = pglobstar == pattern && termstar == restpattern ?
! 736: *restpattern == EOS ?
! 737: glob2(pathbuf, pathend, pathlim, restpattern - 1, pglob,
! 738: limit) :
! 739: glob2(pathbuf, pathend, pathlim, restpattern + 1, pglob,
! 740: limit) :
! 741: glob3(pathbuf, pathend, pathlim, pattern, restpattern,
! 742: termstar, pglob, limit);
! 743: if (error)
! 744: return error;
! 745: *pathend = EOS;
! 746: }
! 747:
! 748: if (*pathbuf && (g_lstat(pathbuf, &sbuf, pglob) ||
! 749: !S_ISDIR(sbuf.st_mode)
! 750: #ifdef S_IFLINK
! 751: && ((globstar && !chase_symlinks) || !S_ISLNK(sbuf.st_mode))
! 752: #endif
! 753: ))
! 754: return 0;
! 755:
1.12 christos 756: if ((dirp = g_opendir(pathbuf, pglob)) == NULL) {
757: if (pglob->gl_errfunc) {
758: if (g_Ctoc(pathbuf, buf, sizeof(buf)))
1.18 christos 759: return GLOB_ABORTED;
1.12 christos 760: if (pglob->gl_errfunc(buf, errno) ||
761: pglob->gl_flags & GLOB_ERR)
1.18 christos 762: return GLOB_ABORTED;
1.12 christos 763: }
764: /*
765: * Posix/XOpen: glob should return when it encounters a
766: * directory that it cannot open or read
767: * XXX: Should we ignore ENOTDIR and ENOENT though?
768: * I think that Posix had in mind EPERM...
769: */
770: if (pglob->gl_flags & GLOB_ERR)
1.18 christos 771: return GLOB_ABORTED;
1.12 christos 772:
1.18 christos 773: return 0;
1.12 christos 774: }
775:
776: error = 0;
777:
778: /* Search directory for matching names. */
779: if (pglob->gl_flags & GLOB_ALTDIRFUNC)
780: readdirfunc = pglob->gl_readdir;
781: else
782: readdirfunc = (struct dirent *(*)__P((void *))) readdir;
783: while ((dp = (*readdirfunc)(dirp)) != NULL) {
784: u_char *sc;
785: Char *dc;
786:
1.26 christos 787: if ((pglob->gl_flags & GLOB_LIMIT) &&
788: limit[GLOB_INDEX_READDIR]++ >= GLOB_LIMIT_READDIR) {
789: errno = 0;
790: *pathend++ = SEP;
791: *pathend = EOS;
792: return GLOB_NOSPACE;
793: }
794:
1.19 christos 795: /*
796: * Initial DOT must be matched literally, unless we have
797: * GLOB_PERIOD set.
798: */
799: if ((pglob->gl_flags & GLOB_PERIOD) == 0)
800: if (dp->d_name[0] == DOT && *pattern != DOT)
801: continue;
1.12 christos 802: /*
1.22 christos 803: * If GLOB_NO_DOTDIRS is set, . and .. vanish.
804: */
805: if ((pglob->gl_flags & GLOB_NO_DOTDIRS) &&
806: (dp->d_name[0] == DOT) &&
807: ((dp->d_name[1] == EOS) ||
808: ((dp->d_name[1] == DOT) && (dp->d_name[2] == EOS))))
809: continue;
810: /*
1.12 christos 811: * The resulting string contains EOS, so we can
812: * use the pathlim character, if it is the nul
813: */
814: for (sc = (u_char *) dp->d_name, dc = pathend;
815: dc <= pathlim && (*dc++ = *sc++) != EOS;)
816: continue;
817:
818: /*
819: * Have we filled the buffer without seeing EOS?
820: */
821: if (dc > pathlim && *pathlim != EOS) {
822: /*
823: * Abort when requested by caller, otherwise
824: * reset pathend back to last SEP and continue
825: * with next dir entry.
826: */
827: if (pglob->gl_flags & GLOB_ERR) {
828: error = GLOB_ABORTED;
829: break;
830: }
831: else {
832: *pathend = EOS;
833: continue;
834: }
835: }
836:
1.27 ! christos 837: if (globstar) {
! 838: #ifdef S_IFLNK
! 839: if (!chase_symlinks &&
! 840: (g_lstat(pathbuf, &sbuf, pglob) ||
! 841: S_ISLNK(sbuf.st_mode)))
! 842: continue;
! 843: #endif
! 844:
! 845: if (!match(pathend, pattern, termstar))
! 846: continue;
! 847:
! 848: if (--dc < pathlim - 2)
! 849: *dc++ = SEP;
! 850: *dc = EOS;
! 851: error = glob2(pathbuf, dc, pathlim, pglobstar,
! 852: pglob, limit);
! 853: if (error)
! 854: break;
1.12 christos 855: *pathend = EOS;
1.27 ! christos 856: } else {
! 857: if (!match(pathend, pattern, restpattern)) {
! 858: *pathend = EOS;
! 859: continue;
! 860: }
! 861: error = glob2(pathbuf, --dc, pathlim, restpattern,
! 862: pglob, limit);
! 863: if (error)
! 864: break;
1.12 christos 865: }
866: }
867: if (pglob->gl_flags & GLOB_ALTDIRFUNC)
868: (*pglob->gl_closedir)(dirp);
869: else
870: closedir(dirp);
871:
872: /*
873: * Again Posix X/Open issue with regards to error handling.
874: */
875: if ((error || errno) && (pglob->gl_flags & GLOB_ERR))
1.18 christos 876: return GLOB_ABORTED;
1.12 christos 877:
1.18 christos 878: return error;
1.12 christos 879: }
880:
881:
882: /*
1.17 christos 883: * Extend the gl_pathv member of a glob_t structure to accommodate a new item,
1.12 christos 884: * add the new item, and update gl_pathc.
885: *
886: * This assumes the BSD realloc, which only copies the block when its size
887: * crosses a power-of-two boundary; for v7 realloc, this would cause quadratic
888: * behavior.
889: *
890: * Return 0 if new item added, error code if memory couldn't be allocated.
891: *
892: * Invariant of the glob_t structure:
893: * Either gl_pathc is zero and gl_pathv is NULL; or gl_pathc > 0 and
894: * gl_pathv points to (gl_offs + gl_pathc + 1) items.
895: */
896: static int
1.18 christos 897: globextend(const Char *path, glob_t *pglob, size_t *limit)
1.12 christos 898: {
899: char **pathv;
1.16 christos 900: size_t i, newsize, len;
1.12 christos 901: char *copy;
902: const Char *p;
903:
904: _DIAGASSERT(path != NULL);
905: _DIAGASSERT(pglob != NULL);
906:
907: newsize = sizeof(*pathv) * (2 + pglob->gl_pathc + pglob->gl_offs);
908: pathv = pglob->gl_pathv ? realloc(pglob->gl_pathv, newsize) :
909: malloc(newsize);
910: if (pathv == NULL)
1.18 christos 911: return GLOB_NOSPACE;
1.12 christos 912:
913: if (pglob->gl_pathv == NULL && pglob->gl_offs > 0) {
914: /* first time around -- clear initial gl_offs items */
915: pathv += pglob->gl_offs;
1.16 christos 916: for (i = pglob->gl_offs + 1; --i > 0; )
1.12 christos 917: *--pathv = NULL;
918: }
919: pglob->gl_pathv = pathv;
920:
921: for (p = path; *p++;)
922: continue;
923: len = (size_t)(p - path);
1.26 christos 924: limit[GLOB_INDEX_MALLOC] += len;
1.12 christos 925: if ((copy = malloc(len)) != NULL) {
926: if (g_Ctoc(path, copy, len)) {
927: free(copy);
1.18 christos 928: return GLOB_ABORTED;
1.12 christos 929: }
930: pathv[pglob->gl_offs + pglob->gl_pathc++] = copy;
931: }
932: pathv[pglob->gl_offs + pglob->gl_pathc] = NULL;
933:
1.26 christos 934: if ((pglob->gl_flags & GLOB_LIMIT) &&
935: (newsize + limit[GLOB_INDEX_MALLOC]) >= GLOB_LIMIT_MALLOC) {
1.12 christos 936: errno = 0;
1.18 christos 937: return GLOB_NOSPACE;
1.12 christos 938: }
939:
1.18 christos 940: return copy == NULL ? GLOB_NOSPACE : 0;
1.12 christos 941: }
942:
943:
944: /*
945: * pattern matching function for filenames. Each occurrence of the *
946: * pattern causes a recursion level.
947: */
948: static int
1.27 ! christos 949: match(const Char *name, const Char *pat, const Char *patend)
1.12 christos 950: {
951: int ok, negate_range;
952: Char c, k;
953:
954: _DIAGASSERT(name != NULL);
955: _DIAGASSERT(pat != NULL);
956: _DIAGASSERT(patend != NULL);
957:
958: while (pat < patend) {
959: c = *pat++;
960: switch (c & M_MASK) {
961: case M_ALL:
1.27 ! christos 962: while (pat < patend && (*pat & M_MASK) == M_ALL)
! 963: pat++; /* eat consecutive '*' */
1.12 christos 964: if (pat == patend)
1.18 christos 965: return 1;
1.27 ! christos 966: for (; !match(name, pat, patend); name++)
! 967: if (*name == EOS)
! 968: return 0;
! 969: return 1;
1.12 christos 970: case M_ONE:
971: if (*name++ == EOS)
1.18 christos 972: return 0;
1.12 christos 973: break;
974: case M_SET:
975: ok = 0;
976: if ((k = *name++) == EOS)
1.18 christos 977: return 0;
1.12 christos 978: if ((negate_range = ((*pat & M_MASK) == M_NOT)) != EOS)
979: ++pat;
980: while (((c = *pat++) & M_MASK) != M_END)
981: if ((*pat & M_MASK) == M_RNG) {
982: if (c <= k && k <= pat[1])
983: ok = 1;
984: pat += 2;
985: } else if (c == k)
986: ok = 1;
987: if (ok == negate_range)
1.18 christos 988: return 0;
1.12 christos 989: break;
990: default:
991: if (*name++ != c)
1.18 christos 992: return 0;
1.12 christos 993: break;
994: }
995: }
1.18 christos 996: return *name == EOS;
1.12 christos 997: }
998:
999: /* Free allocated data belonging to a glob_t structure. */
1000: void
1.18 christos 1001: globfree(glob_t *pglob)
1.12 christos 1002: {
1.16 christos 1003: size_t i;
1.12 christos 1004: char **pp;
1005:
1006: _DIAGASSERT(pglob != NULL);
1007:
1008: if (pglob->gl_pathv != NULL) {
1009: pp = pglob->gl_pathv + pglob->gl_offs;
1010: for (i = pglob->gl_pathc; i--; ++pp)
1011: if (*pp)
1012: free(*pp);
1013: free(pglob->gl_pathv);
1014: pglob->gl_pathv = NULL;
1015: pglob->gl_pathc = 0;
1016: }
1017: }
1018:
1.24 christos 1019: #ifndef __LIBC12_SOURCE__
1020: int
1021: glob_pattern_p(const char *pattern, int quote)
1022: {
1023: int range = 0;
1024:
1025: for (; *pattern; pattern++)
1026: switch (*pattern) {
1027: case QUESTION:
1028: case STAR:
1029: return 1;
1030:
1031: case QUOTE:
1.27 ! christos 1032: if (quote && pattern[1] != EOS)
1.24 christos 1033: ++pattern;
1034: break;
1035:
1036: case LBRACKET:
1037: range = 1;
1038: break;
1039:
1040: case RBRACKET:
1041: if (range)
1042: return 1;
1043: break;
1044: default:
1045: break;
1046: }
1047:
1048: return 0;
1049: }
1050: #endif
1051:
1.12 christos 1052: static DIR *
1.18 christos 1053: g_opendir(Char *str, glob_t *pglob)
1.12 christos 1054: {
1055: char buf[MAXPATHLEN];
1056:
1057: _DIAGASSERT(str != NULL);
1058: _DIAGASSERT(pglob != NULL);
1059:
1060: if (!*str)
1061: (void)strlcpy(buf, ".", sizeof(buf));
1062: else {
1063: if (g_Ctoc(str, buf, sizeof(buf)))
1064: return NULL;
1065: }
1066:
1067: if (pglob->gl_flags & GLOB_ALTDIRFUNC)
1.18 christos 1068: return (*pglob->gl_opendir)(buf);
1.12 christos 1069:
1.18 christos 1070: return opendir(buf);
1.12 christos 1071: }
1072:
1073: static int
1.18 christos 1074: g_lstat(Char *fn, __gl_stat_t *sb, glob_t *pglob)
1.12 christos 1075: {
1076: char buf[MAXPATHLEN];
1077:
1078: _DIAGASSERT(fn != NULL);
1079: _DIAGASSERT(sb != NULL);
1080: _DIAGASSERT(pglob != NULL);
1081:
1082: if (g_Ctoc(fn, buf, sizeof(buf)))
1083: return -1;
1084: if (pglob->gl_flags & GLOB_ALTDIRFUNC)
1.18 christos 1085: return (*pglob->gl_lstat)(buf, sb);
1086: return lstat(buf, sb);
1.12 christos 1087: }
1088:
1089: static int
1.18 christos 1090: g_stat(Char *fn, __gl_stat_t *sb, glob_t *pglob)
1.12 christos 1091: {
1092: char buf[MAXPATHLEN];
1093:
1094: _DIAGASSERT(fn != NULL);
1095: _DIAGASSERT(sb != NULL);
1096: _DIAGASSERT(pglob != NULL);
1097:
1098: if (g_Ctoc(fn, buf, sizeof(buf)))
1099: return -1;
1100: if (pglob->gl_flags & GLOB_ALTDIRFUNC)
1.18 christos 1101: return (*pglob->gl_stat)(buf, sb);
1102: return stat(buf, sb);
1.12 christos 1103: }
1104:
1105: static Char *
1.18 christos 1106: g_strchr(const Char *str, int ch)
1.12 christos 1107: {
1108:
1109: _DIAGASSERT(str != NULL);
1110:
1111: do {
1112: if (*str == ch)
1.14 christos 1113: return __UNCONST(str);
1.12 christos 1114: } while (*str++);
1115: return NULL;
1116: }
1117:
1118: static int
1.18 christos 1119: g_Ctoc(const Char *str, char *buf, size_t len)
1.12 christos 1120: {
1121: char *dc;
1122:
1123: _DIAGASSERT(str != NULL);
1124: _DIAGASSERT(buf != NULL);
1125:
1126: if (len == 0)
1127: return 1;
1128:
1129: for (dc = buf; len && (*dc++ = *str++) != EOS; len--)
1130: continue;
1131:
1132: return len == 0;
1133: }
1134:
1135: #ifdef DEBUG
1136: static void
1.18 christos 1137: qprintf(const char *str, Char *s)
1.12 christos 1138: {
1139: Char *p;
1140:
1141: _DIAGASSERT(str != NULL);
1142: _DIAGASSERT(s != NULL);
1143:
1144: (void)printf("%s:\n", str);
1145: for (p = s; *p; p++)
1146: (void)printf("%c", CHAR(*p));
1147: (void)printf("\n");
1148: for (p = s; *p; p++)
1149: (void)printf("%c", *p & M_PROTECT ? '"' : ' ');
1150: (void)printf("\n");
1151: for (p = s; *p; p++)
1152: (void)printf("%c", ismeta(*p) ? '_' : ' ');
1153: (void)printf("\n");
1154: }
1155: #endif
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