Annotation of src/lib/libc/gen/glob.c, Revision 1.32
1.32 ! christos 1: /* $NetBSD: glob.c,v 1.31 2011/10/30 21:53:43 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
1.32 ! christos 40: __RCSID("$NetBSD: glob.c,v 1.31 2011/10/30 21:53:43 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:
1.28 christos 90: #define GLOB_LIMIT_STRING 65536 /* number of readdirs */
91: #define GLOB_LIMIT_STAT 128 /* number of stat system calls */
92: #define GLOB_LIMIT_READDIR 16384 /* total buffer size of path strings */
93: #define GLOB_LIMIT_PATH 1024 /* number of path elements */
94: #define GLOB_LIMIT_BRACE 128 /* Number of brace calls */
95:
96: struct glob_limit {
97: size_t l_string;
98: size_t l_stat;
99: size_t l_readdir;
100: size_t l_brace;
101: };
1.23 ad 102:
1.12 christos 103: /*
104: * XXX: For NetBSD 1.4.x compatibility. (kill me l8r)
105: */
106: #ifndef _DIAGASSERT
107: #define _DIAGASSERT(a)
108: #endif
109:
110: #define DOLLAR '$'
111: #define DOT '.'
112: #define EOS '\0'
113: #define LBRACKET '['
114: #define NOT '!'
115: #define QUESTION '?'
116: #define QUOTE '\\'
117: #define RANGE '-'
118: #define RBRACKET ']'
119: #define SEP '/'
120: #define STAR '*'
121: #define TILDE '~'
122: #define UNDERSCORE '_'
123: #define LBRACE '{'
124: #define RBRACE '}'
125: #define SLASH '/'
126: #define COMMA ','
127:
1.15 christos 128: #ifndef USE_8BIT_CHARS
1.12 christos 129:
130: #define M_QUOTE 0x8000
131: #define M_PROTECT 0x4000
132: #define M_MASK 0xffff
133: #define M_ASCII 0x00ff
134:
135: typedef u_short Char;
136:
137: #else
138:
1.15 christos 139: #define M_QUOTE (Char)0x80
140: #define M_PROTECT (Char)0x40
141: #define M_MASK (Char)0xff
142: #define M_ASCII (Char)0x7f
1.12 christos 143:
144: typedef char Char;
145:
146: #endif
147:
148:
149: #define CHAR(c) ((Char)((c)&M_ASCII))
150: #define META(c) ((Char)((c)|M_QUOTE))
151: #define M_ALL META('*')
152: #define M_END META(']')
153: #define M_NOT META('!')
154: #define M_ONE META('?')
155: #define M_RNG META('-')
156: #define M_SET META('[')
157: #define ismeta(c) (((c)&M_QUOTE) != 0)
158:
159:
1.18 christos 160: static int compare(const void *, const void *);
161: static int g_Ctoc(const Char *, char *, size_t);
162: static int g_lstat(Char *, __gl_stat_t *, glob_t *);
163: static DIR *g_opendir(Char *, glob_t *);
164: static Char *g_strchr(const Char *, int);
165: static int g_stat(Char *, __gl_stat_t *, glob_t *);
1.32 ! christos 166: static int glob0(const char *, const Char *, glob_t *, struct glob_limit *);
1.28 christos 167: static int glob1(Char *, glob_t *, struct glob_limit *);
1.27 christos 168: static int glob2(Char *, Char *, Char *, const Char *, glob_t *,
1.28 christos 169: struct glob_limit *);
1.27 christos 170: static int glob3(Char *, Char *, Char *, const Char *, const Char *,
1.28 christos 171: const Char *, glob_t *, struct glob_limit *);
172: static int globextend(const Char *, glob_t *, struct glob_limit *);
1.18 christos 173: static const Char *globtilde(const Char *, Char *, size_t, glob_t *);
1.32 ! christos 174: static int globexp1(const char *, const Char *, glob_t *, struct glob_limit *);
! 175: static int globexp2(const char *, const Char *, const Char *, glob_t *, int *,
1.28 christos 176: struct glob_limit *);
1.27 christos 177: static int match(const Char *, const Char *, const Char *);
1.12 christos 178: #ifdef DEBUG
1.18 christos 179: static void qprintf(const char *, Char *);
1.12 christos 180: #endif
181:
182: int
1.31 christos 183: glob(const char * __restrict pattern, int flags, int (*errfunc)(const char *,
184: int), glob_t * __restrict pglob)
1.12 christos 185: {
186: const u_char *patnext;
187: int c;
188: Char *bufnext, *bufend, patbuf[MAXPATHLEN+1];
1.28 christos 189: struct glob_limit limit = { 0, 0, 0, 0 };
1.12 christos 190:
191: _DIAGASSERT(pattern != NULL);
192:
193: patnext = (const u_char *) pattern;
194: if (!(flags & GLOB_APPEND)) {
195: pglob->gl_pathc = 0;
196: pglob->gl_pathv = NULL;
197: if (!(flags & GLOB_DOOFFS))
198: pglob->gl_offs = 0;
199: }
200: pglob->gl_flags = flags & ~GLOB_MAGCHAR;
201: pglob->gl_errfunc = errfunc;
202: pglob->gl_matchc = 0;
203:
204: bufnext = patbuf;
205: bufend = bufnext + MAXPATHLEN;
206: if (flags & GLOB_NOESCAPE) {
207: while (bufnext < bufend && (c = *patnext++) != EOS)
208: *bufnext++ = c;
209: } else {
210: /* Protect the quoted characters. */
211: while (bufnext < bufend && (c = *patnext++) != EOS)
212: if (c == QUOTE) {
213: if ((c = *patnext++) == EOS) {
214: c = QUOTE;
215: --patnext;
216: }
217: *bufnext++ = c | M_PROTECT;
218: }
219: else
220: *bufnext++ = c;
221: }
222: *bufnext = EOS;
223:
224: if (flags & GLOB_BRACE)
1.32 ! christos 225: return globexp1(pattern, patbuf, pglob, &limit);
1.12 christos 226: else
1.32 ! christos 227: return glob0(pattern, patbuf, pglob, &limit);
1.12 christos 228: }
229:
230: /*
231: * Expand recursively a glob {} pattern. When there is no more expansion
232: * invoke the standard globbing routine to glob the rest of the magic
233: * characters
234: */
235: static int
1.32 ! christos 236: globexp1(const char *orig, const Char *pattern, glob_t *pglob, struct glob_limit *limit)
1.12 christos 237: {
238: const Char* ptr = pattern;
239: int rv;
240:
241: _DIAGASSERT(pattern != NULL);
242: _DIAGASSERT(pglob != NULL);
243:
1.28 christos 244: if ((pglob->gl_flags & GLOB_LIMIT) &&
245: limit->l_brace++ >= GLOB_LIMIT_BRACE) {
246: errno = 0;
247: return GLOB_NOSPACE;
248: }
249:
1.12 christos 250: /* Protect a single {}, for find(1), like csh */
251: if (pattern[0] == LBRACE && pattern[1] == RBRACE && pattern[2] == EOS)
1.32 ! christos 252: return glob0(orig, pattern, pglob, limit);
1.12 christos 253:
254: while ((ptr = (const Char *) g_strchr(ptr, LBRACE)) != NULL)
1.32 ! christos 255: if (!globexp2(orig, ptr, pattern, pglob, &rv, limit))
1.12 christos 256: return rv;
257:
1.32 ! christos 258: return glob0(orig, pattern, pglob, limit);
1.12 christos 259: }
260:
261:
262: /*
263: * Recursive brace globbing helper. Tries to expand a single brace.
264: * If it succeeds then it invokes globexp1 with the new pattern.
265: * If it fails then it tries to glob the rest of the pattern and returns.
266: */
267: static int
1.32 ! christos 268: globexp2(const char *orig, const Char *ptr, const Char *pattern, glob_t *pglob, int *rv,
1.28 christos 269: struct glob_limit *limit)
1.12 christos 270: {
271: int i;
272: Char *lm, *ls;
273: const Char *pe, *pm, *pl;
274: Char patbuf[MAXPATHLEN + 1];
275:
276: _DIAGASSERT(ptr != NULL);
277: _DIAGASSERT(pattern != NULL);
278: _DIAGASSERT(pglob != NULL);
279: _DIAGASSERT(rv != NULL);
280:
281: /* copy part up to the brace */
282: for (lm = patbuf, pm = pattern; pm != ptr; *lm++ = *pm++)
283: continue;
284: ls = lm;
285:
286: /* Find the balanced brace */
287: for (i = 0, pe = ++ptr; *pe; pe++)
288: if (*pe == LBRACKET) {
289: /* Ignore everything between [] */
290: for (pm = pe++; *pe != RBRACKET && *pe != EOS; pe++)
291: continue;
292: if (*pe == EOS) {
293: /*
294: * We could not find a matching RBRACKET.
295: * Ignore and just look for RBRACE
296: */
297: pe = pm;
298: }
299: }
300: else if (*pe == LBRACE)
301: i++;
302: else if (*pe == RBRACE) {
303: if (i == 0)
304: break;
305: i--;
306: }
307:
308: /* Non matching braces; just glob the pattern */
309: if (i != 0 || *pe == EOS) {
310: /*
311: * we use `pattern', not `patbuf' here so that that
312: * unbalanced braces are passed to the match
313: */
1.32 ! christos 314: *rv = glob0(orig, pattern, pglob, limit);
1.12 christos 315: return 0;
316: }
317:
318: for (i = 0, pl = pm = ptr; pm <= pe; pm++) {
319: switch (*pm) {
320: case LBRACKET:
321: /* Ignore everything between [] */
322: for (pl = pm++; *pm != RBRACKET && *pm != EOS; pm++)
323: continue;
324: if (*pm == EOS) {
325: /*
326: * We could not find a matching RBRACKET.
327: * Ignore and just look for RBRACE
328: */
329: pm = pl;
330: }
331: break;
332:
333: case LBRACE:
334: i++;
335: break;
336:
337: case RBRACE:
338: if (i) {
339: i--;
340: break;
341: }
342: /* FALLTHROUGH */
343: case COMMA:
344: if (i && *pm == COMMA)
345: break;
346: else {
347: /* Append the current string */
348: for (lm = ls; (pl < pm); *lm++ = *pl++)
349: continue;
350: /*
351: * Append the rest of the pattern after the
352: * closing brace
353: */
354: for (pl = pe + 1; (*lm++ = *pl++) != EOS;)
355: continue;
356:
357: /* Expand the current pattern */
358: #ifdef DEBUG
1.27 christos 359: qprintf("globexp2", patbuf);
1.12 christos 360: #endif
1.32 ! christos 361: *rv = globexp1(orig, patbuf, pglob, limit);
1.12 christos 362:
363: /* move after the comma, to the next string */
364: pl = pm + 1;
365: }
366: break;
367:
368: default:
369: break;
370: }
371: }
372: *rv = 0;
373: return 0;
374: }
375:
376:
377:
378: /*
379: * expand tilde from the passwd file.
380: */
381: static const Char *
1.18 christos 382: globtilde(const Char *pattern, Char *patbuf, size_t patsize, glob_t *pglob)
1.12 christos 383: {
384: struct passwd *pwd;
385: const char *h;
386: const Char *p;
387: Char *b;
388: char *d;
389: Char *pend = &patbuf[patsize / sizeof(Char)];
390: #ifndef NO_GETPW_R
391: struct passwd pwres;
392: char pwbuf[1024];
393: #endif
394:
395: pend--;
396:
397: _DIAGASSERT(pattern != NULL);
398: _DIAGASSERT(patbuf != NULL);
399: _DIAGASSERT(pglob != NULL);
400:
401: if (*pattern != TILDE || !(pglob->gl_flags & GLOB_TILDE))
402: return pattern;
403:
404: /* Copy up to the end of the string or / */
405: for (p = pattern + 1, d = (char *)(void *)patbuf;
406: d < (char *)(void *)pend && *p && *p != SLASH;
407: *d++ = *p++)
408: continue;
409:
410: if (d == (char *)(void *)pend)
411: return NULL;
412:
413: *d = EOS;
414: d = (char *)(void *)patbuf;
415:
416: if (*d == EOS) {
417: /*
418: * handle a plain ~ or ~/ by expanding $HOME
419: * first and then trying the password file
420: */
421: if ((h = getenv("HOME")) == NULL) {
422: #ifdef NO_GETPW_R
423: if ((pwd = getpwuid(getuid())) == NULL)
424: #else
425: if (getpwuid_r(getuid(), &pwres, pwbuf, sizeof(pwbuf),
426: &pwd) != 0 || pwd == NULL)
427: #endif
428: return pattern;
429: else
430: h = pwd->pw_dir;
431: }
432: }
433: else {
434: /*
435: * Expand a ~user
436: */
437: #ifdef NO_GETPW_R
438: if ((pwd = getpwnam(d)) == NULL)
439: #else
440: if (getpwnam_r(d, &pwres, pwbuf, sizeof(pwbuf), &pwd) != 0 ||
441: pwd == NULL)
442: #endif
443: return pattern;
444: else
445: h = pwd->pw_dir;
446: }
447:
448: /* Copy the home directory */
449: for (b = patbuf; b < pend && *h; *b++ = *h++)
450: continue;
451:
452: if (b == pend)
453: return NULL;
454:
455: /* Append the rest of the pattern */
456: while (b < pend && (*b++ = *p++) != EOS)
457: continue;
458:
459: if (b == pend)
460: return NULL;
461:
462: return patbuf;
463: }
464:
465:
466: /*
467: * The main glob() routine: compiles the pattern (optionally processing
468: * quotes), calls glob1() to do the real pattern matching, and finally
469: * sorts the list (unless unsorted operation is requested). Returns 0
470: * if things went well, nonzero if errors occurred. It is not an error
471: * to find no matches.
472: */
473: static int
1.32 ! christos 474: glob0(const char *orig, const Char *pattern, glob_t *pglob, struct glob_limit *limit)
1.12 christos 475: {
476: const Char *qpatnext;
1.16 christos 477: int c, error;
478: __gl_size_t oldpathc;
1.12 christos 479: Char *bufnext, patbuf[MAXPATHLEN+1];
480:
481: _DIAGASSERT(pattern != NULL);
482: _DIAGASSERT(pglob != NULL);
483:
484: if ((qpatnext = globtilde(pattern, patbuf, sizeof(patbuf),
485: pglob)) == NULL)
486: return GLOB_ABEND;
487: oldpathc = pglob->gl_pathc;
488: bufnext = patbuf;
489:
490: /* We don't need to check for buffer overflow any more. */
491: while ((c = *qpatnext++) != EOS) {
492: switch (c) {
493: case LBRACKET:
494: c = *qpatnext;
495: if (c == NOT)
496: ++qpatnext;
497: if (*qpatnext == EOS ||
498: g_strchr(qpatnext+1, RBRACKET) == NULL) {
499: *bufnext++ = LBRACKET;
500: if (c == NOT)
501: --qpatnext;
502: break;
503: }
504: *bufnext++ = M_SET;
505: if (c == NOT)
506: *bufnext++ = M_NOT;
507: c = *qpatnext++;
508: do {
509: *bufnext++ = CHAR(c);
510: if (*qpatnext == RANGE &&
511: (c = qpatnext[1]) != RBRACKET) {
512: *bufnext++ = M_RNG;
513: *bufnext++ = CHAR(c);
514: qpatnext += 2;
515: }
516: } while ((c = *qpatnext++) != RBRACKET);
517: pglob->gl_flags |= GLOB_MAGCHAR;
518: *bufnext++ = M_END;
519: break;
520: case QUESTION:
521: pglob->gl_flags |= GLOB_MAGCHAR;
522: *bufnext++ = M_ONE;
523: break;
524: case STAR:
525: pglob->gl_flags |= GLOB_MAGCHAR;
1.27 christos 526: /* collapse adjacent stars to one [or three if globstar]
1.12 christos 527: * to avoid exponential behavior
528: */
1.27 christos 529: if (bufnext == patbuf || bufnext[-1] != M_ALL ||
530: ((pglob->gl_flags & GLOB_STAR) != 0 &&
531: (bufnext - 1 == patbuf || bufnext[-2] != M_ALL ||
532: bufnext - 2 == patbuf || bufnext[-3] != M_ALL)))
1.12 christos 533: *bufnext++ = M_ALL;
534: break;
535: default:
536: *bufnext++ = CHAR(c);
537: break;
538: }
539: }
540: *bufnext = EOS;
541: #ifdef DEBUG
1.27 christos 542: qprintf("glob0", patbuf);
1.12 christos 543: #endif
544:
1.25 christos 545: if ((error = glob1(patbuf, pglob, limit)) != 0)
1.18 christos 546: return error;
1.12 christos 547:
548: if (pglob->gl_pathc == oldpathc) {
549: /*
550: * If there was no match we are going to append the pattern
551: * if GLOB_NOCHECK was specified or if GLOB_NOMAGIC was
552: * specified and the pattern did not contain any magic
553: * characters GLOB_NOMAGIC is there just for compatibility
554: * with csh.
555: */
556: if ((pglob->gl_flags & GLOB_NOCHECK) ||
557: ((pglob->gl_flags & (GLOB_NOMAGIC|GLOB_MAGCHAR))
558: == GLOB_NOMAGIC)) {
1.32 ! christos 559: const u_char *patnext;
! 560: Char *bufend;
! 561: bufend = patbuf + MAXPATHLEN;
! 562: patnext = (const unsigned char *)orig;
! 563: bufnext = patbuf;
! 564: while (bufnext < bufend && (c = *patnext++) != EOS)
! 565: *bufnext++ = c;
! 566:
! 567: *bufnext = EOS;
! 568:
! 569: return globextend(patbuf, pglob, limit);
1.12 christos 570: } else {
1.18 christos 571: return GLOB_NOMATCH;
1.12 christos 572: }
573: } else if (!(pglob->gl_flags & GLOB_NOSORT)) {
574: qsort(pglob->gl_pathv + pglob->gl_offs + oldpathc,
575: (size_t)pglob->gl_pathc - oldpathc, sizeof(char *),
576: compare);
577: }
578:
1.18 christos 579: return 0;
1.12 christos 580: }
581:
582: static int
1.18 christos 583: compare(const void *p, const void *q)
1.12 christos 584: {
585:
586: _DIAGASSERT(p != NULL);
587: _DIAGASSERT(q != NULL);
588:
1.18 christos 589: return strcoll(*(const char * const *)p, *(const char * const *)q);
1.12 christos 590: }
591:
592: static int
1.28 christos 593: glob1(Char *pattern, glob_t *pglob, struct glob_limit *limit)
1.12 christos 594: {
595: Char pathbuf[MAXPATHLEN+1];
596:
597: _DIAGASSERT(pattern != NULL);
598: _DIAGASSERT(pglob != NULL);
599:
600: /* A null pathname is invalid -- POSIX 1003.1 sect. 2.4. */
601: if (*pattern == EOS)
1.18 christos 602: return 0;
1.12 christos 603: /*
604: * we save one character so that we can use ptr >= limit,
605: * in the general case when we are appending non nul chars only.
606: */
1.18 christos 607: return glob2(pathbuf, pathbuf,
608: pathbuf + (sizeof(pathbuf) / sizeof(*pathbuf)) - 1, pattern,
609: pglob, limit);
1.12 christos 610: }
611:
612: /*
613: * The functions glob2 and glob3 are mutually recursive; there is one level
614: * of recursion for each segment in the pattern that contains one or more
615: * meta characters.
616: */
617: static int
1.27 christos 618: glob2(Char *pathbuf, Char *pathend, Char *pathlim, const Char *pattern,
1.28 christos 619: glob_t *pglob, struct glob_limit *limit)
1.12 christos 620: {
621: __gl_stat_t sb;
1.27 christos 622: const Char *p;
623: Char *q;
1.12 christos 624: int anymeta;
1.21 christos 625: Char *pend;
626: ptrdiff_t diff;
1.12 christos 627:
628: _DIAGASSERT(pathbuf != NULL);
629: _DIAGASSERT(pathend != NULL);
630: _DIAGASSERT(pattern != NULL);
631: _DIAGASSERT(pglob != NULL);
632:
1.27 christos 633: #ifdef DEBUG
634: qprintf("glob2", pathbuf);
635: #endif
1.12 christos 636: /*
637: * Loop over pattern segments until end of pattern or until
638: * segment with meta character found.
639: */
640: for (anymeta = 0;;) {
641: if (*pattern == EOS) { /* End of pattern? */
642: *pathend = EOS;
643: if (g_lstat(pathbuf, &sb, pglob))
1.18 christos 644: return 0;
1.12 christos 645:
1.26 christos 646: if ((pglob->gl_flags & GLOB_LIMIT) &&
1.28 christos 647: limit->l_stat++ >= GLOB_LIMIT_STAT) {
1.26 christos 648: errno = 0;
649: *pathend++ = SEP;
650: *pathend = EOS;
651: return GLOB_NOSPACE;
652: }
1.12 christos 653: if (((pglob->gl_flags & GLOB_MARK) &&
654: pathend[-1] != SEP) && (S_ISDIR(sb.st_mode) ||
655: (S_ISLNK(sb.st_mode) &&
656: (g_stat(pathbuf, &sb, pglob) == 0) &&
657: S_ISDIR(sb.st_mode)))) {
658: if (pathend >= pathlim)
1.18 christos 659: return GLOB_ABORTED;
1.12 christos 660: *pathend++ = SEP;
661: *pathend = EOS;
662: }
663: ++pglob->gl_matchc;
1.18 christos 664: return globextend(pathbuf, pglob, limit);
1.12 christos 665: }
666:
667: /* Find end of next segment, copy tentatively to pathend. */
668: q = pathend;
669: p = pattern;
670: while (*p != EOS && *p != SEP) {
671: if (ismeta(*p))
672: anymeta = 1;
673: if (q >= pathlim)
674: return GLOB_ABORTED;
675: *q++ = *p++;
676: }
677:
1.20 christos 678: /*
1.21 christos 679: * No expansion, or path ends in slash-dot shash-dot-dot,
1.20 christos 680: * do next segment.
681: */
1.21 christos 682: if (pglob->gl_flags & GLOB_PERIOD) {
683: for (pend = pathend; pend > pathbuf && pend[-1] == '/';
684: pend--)
685: continue;
686: diff = pend - pathbuf;
687: } else {
688: /* XXX: GCC */
689: diff = 0;
690: pend = pathend;
691: }
692:
693: if ((!anymeta) ||
694: ((pglob->gl_flags & GLOB_PERIOD) &&
695: (diff >= 1 && pend[-1] == DOT) &&
696: (diff >= 2 && (pend[-2] == SLASH || pend[-2] == DOT)) &&
697: (diff < 3 || pend[-3] == SLASH))) {
1.12 christos 698: pathend = q;
699: pattern = p;
700: while (*pattern == SEP) {
701: if (pathend >= pathlim)
702: return GLOB_ABORTED;
703: *pathend++ = *pattern++;
704: }
705: } else /* Need expansion, recurse. */
1.18 christos 706: return glob3(pathbuf, pathend, pathlim, pattern, p,
1.27 christos 707: pattern, pglob, limit);
1.12 christos 708: }
709: /* NOTREACHED */
710: }
711:
712: static int
1.27 christos 713: glob3(Char *pathbuf, Char *pathend, Char *pathlim, const Char *pattern,
714: const Char *restpattern, const Char *pglobstar, glob_t *pglob,
1.28 christos 715: struct glob_limit *limit)
1.12 christos 716: {
717: struct dirent *dp;
718: DIR *dirp;
1.27 christos 719: __gl_stat_t sbuf;
1.12 christos 720: int error;
721: char buf[MAXPATHLEN];
1.27 christos 722: int globstar = 0;
723: int chase_symlinks = 0;
724: const Char *termstar = NULL;
1.12 christos 725:
726: /*
727: * The readdirfunc declaration can't be prototyped, because it is
728: * assigned, below, to two functions which are prototyped in glob.h
729: * and dirent.h as taking pointers to differently typed opaque
730: * structures.
731: */
1.18 christos 732: struct dirent *(*readdirfunc)(void *);
1.12 christos 733:
734: _DIAGASSERT(pathbuf != NULL);
735: _DIAGASSERT(pathend != NULL);
736: _DIAGASSERT(pattern != NULL);
737: _DIAGASSERT(restpattern != NULL);
738: _DIAGASSERT(pglob != NULL);
739:
740: *pathend = EOS;
741: errno = 0;
742:
1.27 christos 743: while (pglobstar < restpattern) {
744: if ((pglobstar[0] & M_MASK) == M_ALL &&
745: (pglobstar[1] & M_MASK) == M_ALL) {
746: globstar = 1;
747: chase_symlinks = (pglobstar[2] & M_MASK) == M_ALL;
748: termstar = pglobstar + (2 + chase_symlinks);
749: break;
750: }
751: pglobstar++;
752: }
753:
754: if (globstar) {
755: error = pglobstar == pattern && termstar == restpattern ?
756: *restpattern == EOS ?
757: glob2(pathbuf, pathend, pathlim, restpattern - 1, pglob,
758: limit) :
759: glob2(pathbuf, pathend, pathlim, restpattern + 1, pglob,
760: limit) :
761: glob3(pathbuf, pathend, pathlim, pattern, restpattern,
762: termstar, pglob, limit);
763: if (error)
764: return error;
765: *pathend = EOS;
766: }
767:
768: if (*pathbuf && (g_lstat(pathbuf, &sbuf, pglob) ||
769: !S_ISDIR(sbuf.st_mode)
770: #ifdef S_IFLINK
771: && ((globstar && !chase_symlinks) || !S_ISLNK(sbuf.st_mode))
772: #endif
773: ))
774: return 0;
775:
1.12 christos 776: if ((dirp = g_opendir(pathbuf, pglob)) == NULL) {
777: if (pglob->gl_errfunc) {
778: if (g_Ctoc(pathbuf, buf, sizeof(buf)))
1.18 christos 779: return GLOB_ABORTED;
1.12 christos 780: if (pglob->gl_errfunc(buf, errno) ||
781: pglob->gl_flags & GLOB_ERR)
1.18 christos 782: return GLOB_ABORTED;
1.12 christos 783: }
784: /*
785: * Posix/XOpen: glob should return when it encounters a
786: * directory that it cannot open or read
787: * XXX: Should we ignore ENOTDIR and ENOENT though?
788: * I think that Posix had in mind EPERM...
789: */
790: if (pglob->gl_flags & GLOB_ERR)
1.18 christos 791: return GLOB_ABORTED;
1.12 christos 792:
1.18 christos 793: return 0;
1.12 christos 794: }
795:
796: error = 0;
797:
798: /* Search directory for matching names. */
799: if (pglob->gl_flags & GLOB_ALTDIRFUNC)
800: readdirfunc = pglob->gl_readdir;
801: else
1.30 christos 802: readdirfunc = (struct dirent *(*)(void *)) readdir;
1.12 christos 803: while ((dp = (*readdirfunc)(dirp)) != NULL) {
804: u_char *sc;
805: Char *dc;
806:
1.26 christos 807: if ((pglob->gl_flags & GLOB_LIMIT) &&
1.28 christos 808: limit->l_readdir++ >= GLOB_LIMIT_READDIR) {
1.26 christos 809: errno = 0;
810: *pathend++ = SEP;
811: *pathend = EOS;
1.30 christos 812: error = GLOB_NOSPACE;
813: break;
1.26 christos 814: }
815:
1.19 christos 816: /*
817: * Initial DOT must be matched literally, unless we have
818: * GLOB_PERIOD set.
819: */
820: if ((pglob->gl_flags & GLOB_PERIOD) == 0)
821: if (dp->d_name[0] == DOT && *pattern != DOT)
822: continue;
1.12 christos 823: /*
1.22 christos 824: * If GLOB_NO_DOTDIRS is set, . and .. vanish.
825: */
826: if ((pglob->gl_flags & GLOB_NO_DOTDIRS) &&
827: (dp->d_name[0] == DOT) &&
828: ((dp->d_name[1] == EOS) ||
829: ((dp->d_name[1] == DOT) && (dp->d_name[2] == EOS))))
830: continue;
831: /*
1.12 christos 832: * The resulting string contains EOS, so we can
833: * use the pathlim character, if it is the nul
834: */
835: for (sc = (u_char *) dp->d_name, dc = pathend;
836: dc <= pathlim && (*dc++ = *sc++) != EOS;)
837: continue;
838:
839: /*
840: * Have we filled the buffer without seeing EOS?
841: */
842: if (dc > pathlim && *pathlim != EOS) {
843: /*
844: * Abort when requested by caller, otherwise
845: * reset pathend back to last SEP and continue
846: * with next dir entry.
847: */
848: if (pglob->gl_flags & GLOB_ERR) {
849: error = GLOB_ABORTED;
850: break;
851: }
852: else {
853: *pathend = EOS;
854: continue;
855: }
856: }
857:
1.27 christos 858: if (globstar) {
859: #ifdef S_IFLNK
860: if (!chase_symlinks &&
861: (g_lstat(pathbuf, &sbuf, pglob) ||
862: S_ISLNK(sbuf.st_mode)))
863: continue;
864: #endif
865:
866: if (!match(pathend, pattern, termstar))
867: continue;
868:
869: if (--dc < pathlim - 2)
870: *dc++ = SEP;
871: *dc = EOS;
872: error = glob2(pathbuf, dc, pathlim, pglobstar,
873: pglob, limit);
874: if (error)
875: break;
1.12 christos 876: *pathend = EOS;
1.27 christos 877: } else {
878: if (!match(pathend, pattern, restpattern)) {
879: *pathend = EOS;
880: continue;
881: }
882: error = glob2(pathbuf, --dc, pathlim, restpattern,
883: pglob, limit);
884: if (error)
885: break;
1.12 christos 886: }
887: }
888: if (pglob->gl_flags & GLOB_ALTDIRFUNC)
889: (*pglob->gl_closedir)(dirp);
890: else
891: closedir(dirp);
892:
893: /*
894: * Again Posix X/Open issue with regards to error handling.
895: */
896: if ((error || errno) && (pglob->gl_flags & GLOB_ERR))
1.18 christos 897: return GLOB_ABORTED;
1.12 christos 898:
1.18 christos 899: return error;
1.12 christos 900: }
901:
902:
903: /*
1.17 christos 904: * Extend the gl_pathv member of a glob_t structure to accommodate a new item,
1.12 christos 905: * add the new item, and update gl_pathc.
906: *
907: * This assumes the BSD realloc, which only copies the block when its size
908: * crosses a power-of-two boundary; for v7 realloc, this would cause quadratic
909: * behavior.
910: *
911: * Return 0 if new item added, error code if memory couldn't be allocated.
912: *
913: * Invariant of the glob_t structure:
914: * Either gl_pathc is zero and gl_pathv is NULL; or gl_pathc > 0 and
915: * gl_pathv points to (gl_offs + gl_pathc + 1) items.
916: */
917: static int
1.28 christos 918: globextend(const Char *path, glob_t *pglob, struct glob_limit *limit)
1.12 christos 919: {
920: char **pathv;
1.16 christos 921: size_t i, newsize, len;
1.12 christos 922: char *copy;
923: const Char *p;
924:
925: _DIAGASSERT(path != NULL);
926: _DIAGASSERT(pglob != NULL);
927:
928: newsize = sizeof(*pathv) * (2 + pglob->gl_pathc + pglob->gl_offs);
1.28 christos 929: if ((pglob->gl_flags & GLOB_LIMIT) &&
930: newsize > GLOB_LIMIT_PATH * sizeof(*pathv))
931: goto nospace;
1.12 christos 932: pathv = pglob->gl_pathv ? realloc(pglob->gl_pathv, newsize) :
933: malloc(newsize);
934: if (pathv == NULL)
1.18 christos 935: return GLOB_NOSPACE;
1.12 christos 936:
937: if (pglob->gl_pathv == NULL && pglob->gl_offs > 0) {
938: /* first time around -- clear initial gl_offs items */
939: pathv += pglob->gl_offs;
1.16 christos 940: for (i = pglob->gl_offs + 1; --i > 0; )
1.12 christos 941: *--pathv = NULL;
942: }
943: pglob->gl_pathv = pathv;
944:
945: for (p = path; *p++;)
946: continue;
947: len = (size_t)(p - path);
1.28 christos 948: limit->l_string += len;
1.12 christos 949: if ((copy = malloc(len)) != NULL) {
950: if (g_Ctoc(path, copy, len)) {
951: free(copy);
1.18 christos 952: return GLOB_ABORTED;
1.12 christos 953: }
954: pathv[pglob->gl_offs + pglob->gl_pathc++] = copy;
955: }
956: pathv[pglob->gl_offs + pglob->gl_pathc] = NULL;
957:
1.26 christos 958: if ((pglob->gl_flags & GLOB_LIMIT) &&
1.28 christos 959: (newsize + limit->l_string) >= GLOB_LIMIT_STRING)
960: goto nospace;
1.12 christos 961:
1.18 christos 962: return copy == NULL ? GLOB_NOSPACE : 0;
1.28 christos 963: nospace:
964: errno = 0;
965: return GLOB_NOSPACE;
1.12 christos 966: }
967:
968:
969: /*
970: * pattern matching function for filenames. Each occurrence of the *
971: * pattern causes a recursion level.
972: */
973: static int
1.27 christos 974: match(const Char *name, const Char *pat, const Char *patend)
1.12 christos 975: {
976: int ok, negate_range;
977: Char c, k;
978:
979: _DIAGASSERT(name != NULL);
980: _DIAGASSERT(pat != NULL);
981: _DIAGASSERT(patend != NULL);
982:
983: while (pat < patend) {
984: c = *pat++;
985: switch (c & M_MASK) {
986: case M_ALL:
1.27 christos 987: while (pat < patend && (*pat & M_MASK) == M_ALL)
988: pat++; /* eat consecutive '*' */
1.12 christos 989: if (pat == patend)
1.18 christos 990: return 1;
1.27 christos 991: for (; !match(name, pat, patend); name++)
992: if (*name == EOS)
993: return 0;
994: return 1;
1.12 christos 995: case M_ONE:
996: if (*name++ == EOS)
1.18 christos 997: return 0;
1.12 christos 998: break;
999: case M_SET:
1000: ok = 0;
1001: if ((k = *name++) == EOS)
1.18 christos 1002: return 0;
1.12 christos 1003: if ((negate_range = ((*pat & M_MASK) == M_NOT)) != EOS)
1004: ++pat;
1005: while (((c = *pat++) & M_MASK) != M_END)
1006: if ((*pat & M_MASK) == M_RNG) {
1007: if (c <= k && k <= pat[1])
1008: ok = 1;
1009: pat += 2;
1010: } else if (c == k)
1011: ok = 1;
1012: if (ok == negate_range)
1.18 christos 1013: return 0;
1.12 christos 1014: break;
1015: default:
1016: if (*name++ != c)
1.18 christos 1017: return 0;
1.12 christos 1018: break;
1019: }
1020: }
1.18 christos 1021: return *name == EOS;
1.12 christos 1022: }
1023:
1024: /* Free allocated data belonging to a glob_t structure. */
1025: void
1.18 christos 1026: globfree(glob_t *pglob)
1.12 christos 1027: {
1.16 christos 1028: size_t i;
1.12 christos 1029: char **pp;
1030:
1031: _DIAGASSERT(pglob != NULL);
1032:
1033: if (pglob->gl_pathv != NULL) {
1034: pp = pglob->gl_pathv + pglob->gl_offs;
1035: for (i = pglob->gl_pathc; i--; ++pp)
1036: if (*pp)
1037: free(*pp);
1038: free(pglob->gl_pathv);
1039: pglob->gl_pathv = NULL;
1040: pglob->gl_pathc = 0;
1041: }
1042: }
1043:
1.24 christos 1044: #ifndef __LIBC12_SOURCE__
1045: int
1046: glob_pattern_p(const char *pattern, int quote)
1047: {
1048: int range = 0;
1049:
1050: for (; *pattern; pattern++)
1051: switch (*pattern) {
1052: case QUESTION:
1053: case STAR:
1054: return 1;
1055:
1056: case QUOTE:
1.27 christos 1057: if (quote && pattern[1] != EOS)
1.24 christos 1058: ++pattern;
1059: break;
1060:
1061: case LBRACKET:
1062: range = 1;
1063: break;
1064:
1065: case RBRACKET:
1066: if (range)
1067: return 1;
1068: break;
1069: default:
1070: break;
1071: }
1072:
1073: return 0;
1074: }
1075: #endif
1076:
1.12 christos 1077: static DIR *
1.18 christos 1078: g_opendir(Char *str, glob_t *pglob)
1.12 christos 1079: {
1080: char buf[MAXPATHLEN];
1081:
1082: _DIAGASSERT(str != NULL);
1083: _DIAGASSERT(pglob != NULL);
1084:
1085: if (!*str)
1086: (void)strlcpy(buf, ".", sizeof(buf));
1087: else {
1088: if (g_Ctoc(str, buf, sizeof(buf)))
1089: return NULL;
1090: }
1091:
1092: if (pglob->gl_flags & GLOB_ALTDIRFUNC)
1.18 christos 1093: return (*pglob->gl_opendir)(buf);
1.12 christos 1094:
1.18 christos 1095: return opendir(buf);
1.12 christos 1096: }
1097:
1098: static int
1.18 christos 1099: g_lstat(Char *fn, __gl_stat_t *sb, glob_t *pglob)
1.12 christos 1100: {
1101: char buf[MAXPATHLEN];
1102:
1103: _DIAGASSERT(fn != NULL);
1104: _DIAGASSERT(sb != NULL);
1105: _DIAGASSERT(pglob != NULL);
1106:
1107: if (g_Ctoc(fn, buf, sizeof(buf)))
1108: return -1;
1109: if (pglob->gl_flags & GLOB_ALTDIRFUNC)
1.18 christos 1110: return (*pglob->gl_lstat)(buf, sb);
1111: return lstat(buf, sb);
1.12 christos 1112: }
1113:
1114: static int
1.18 christos 1115: g_stat(Char *fn, __gl_stat_t *sb, glob_t *pglob)
1.12 christos 1116: {
1117: char buf[MAXPATHLEN];
1118:
1119: _DIAGASSERT(fn != NULL);
1120: _DIAGASSERT(sb != NULL);
1121: _DIAGASSERT(pglob != NULL);
1122:
1123: if (g_Ctoc(fn, buf, sizeof(buf)))
1124: return -1;
1125: if (pglob->gl_flags & GLOB_ALTDIRFUNC)
1.18 christos 1126: return (*pglob->gl_stat)(buf, sb);
1127: return stat(buf, sb);
1.12 christos 1128: }
1129:
1130: static Char *
1.18 christos 1131: g_strchr(const Char *str, int ch)
1.12 christos 1132: {
1133:
1134: _DIAGASSERT(str != NULL);
1135:
1136: do {
1137: if (*str == ch)
1.14 christos 1138: return __UNCONST(str);
1.12 christos 1139: } while (*str++);
1140: return NULL;
1141: }
1142:
1143: static int
1.18 christos 1144: g_Ctoc(const Char *str, char *buf, size_t len)
1.12 christos 1145: {
1146: char *dc;
1147:
1148: _DIAGASSERT(str != NULL);
1149: _DIAGASSERT(buf != NULL);
1150:
1151: if (len == 0)
1152: return 1;
1153:
1154: for (dc = buf; len && (*dc++ = *str++) != EOS; len--)
1155: continue;
1156:
1157: return len == 0;
1158: }
1159:
1160: #ifdef DEBUG
1161: static void
1.18 christos 1162: qprintf(const char *str, Char *s)
1.12 christos 1163: {
1164: Char *p;
1165:
1166: _DIAGASSERT(str != NULL);
1167: _DIAGASSERT(s != NULL);
1168:
1169: (void)printf("%s:\n", str);
1170: for (p = s; *p; p++)
1171: (void)printf("%c", CHAR(*p));
1172: (void)printf("\n");
1173: for (p = s; *p; p++)
1174: (void)printf("%c", *p & M_PROTECT ? '"' : ' ');
1175: (void)printf("\n");
1176: for (p = s; *p; p++)
1177: (void)printf("%c", ismeta(*p) ? '_' : ' ');
1178: (void)printf("\n");
1179: }
1180: #endif
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