Annotation of src/lib/libc/gen/glob.c, Revision 1.23.12.1
1.23.12.1! matt 1: /* $NetBSD$ */
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
1.23.12.1! matt 40: __RCSID("$NetBSD$");
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:
1.23.12.1! matt 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 *);
1.23.12.1! matt 161: static int glob0(const Char *, glob_t *, size_t *);
1.18 christos 162: static int glob1(Char *, glob_t *, size_t *);
163: static int glob2(Char *, Char *, Char *, Char *, glob_t *,
164: size_t *);
165: static int glob3(Char *, Char *, Char *, Char *, Char *, glob_t *,
166: size_t *);
167: static int globextend(const Char *, glob_t *, size_t *);
168: static const Char *globtilde(const Char *, Char *, size_t, glob_t *);
1.23.12.1! matt 169: static int globexp1(const Char *, glob_t *, size_t *);
! 170: static int globexp2(const Char *, const Char *, glob_t *, int *,
! 171: size_t *);
1.18 christos 172: static int match(Char *, Char *, 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];
1.23.12.1! matt 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)
1.23.12.1! matt 221: return globexp1(patbuf, pglob, limit);
1.12 christos 222: else
1.23.12.1! matt 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
1.23.12.1! matt 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)
1.23.12.1! matt 242: return glob0(pattern, pglob, limit);
1.12 christos 243:
244: while ((ptr = (const Char *) g_strchr(ptr, LBRACE)) != NULL)
1.23.12.1! matt 245: if (!globexp2(ptr, pattern, pglob, &rv, limit))
1.12 christos 246: return rv;
247:
1.23.12.1! matt 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
1.23.12.1! matt 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: */
1.23.12.1! matt 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
349: qprintf("globexp2:", patbuf);
350: #endif
1.23.12.1! matt 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
1.23.12.1! matt 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;
516: /* collapse adjacent stars to one,
517: * to avoid exponential behavior
518: */
519: if (bufnext == patbuf || bufnext[-1] != M_ALL)
520: *bufnext++ = M_ALL;
521: break;
522: default:
523: *bufnext++ = CHAR(c);
524: break;
525: }
526: }
527: *bufnext = EOS;
528: #ifdef DEBUG
529: qprintf("glob0:", patbuf);
530: #endif
531:
1.23.12.1! matt 532: if ((error = glob1(patbuf, pglob, limit)) != 0)
1.18 christos 533: return error;
1.12 christos 534:
535: if (pglob->gl_pathc == oldpathc) {
536: /*
537: * If there was no match we are going to append the pattern
538: * if GLOB_NOCHECK was specified or if GLOB_NOMAGIC was
539: * specified and the pattern did not contain any magic
540: * characters GLOB_NOMAGIC is there just for compatibility
541: * with csh.
542: */
543: if ((pglob->gl_flags & GLOB_NOCHECK) ||
544: ((pglob->gl_flags & (GLOB_NOMAGIC|GLOB_MAGCHAR))
545: == GLOB_NOMAGIC)) {
1.23.12.1! matt 546: return globextend(pattern, pglob, limit);
1.12 christos 547: } else {
1.18 christos 548: return GLOB_NOMATCH;
1.12 christos 549: }
550: } else if (!(pglob->gl_flags & GLOB_NOSORT)) {
551: qsort(pglob->gl_pathv + pglob->gl_offs + oldpathc,
552: (size_t)pglob->gl_pathc - oldpathc, sizeof(char *),
553: compare);
554: }
555:
1.18 christos 556: return 0;
1.12 christos 557: }
558:
559: static int
1.18 christos 560: compare(const void *p, const void *q)
1.12 christos 561: {
562:
563: _DIAGASSERT(p != NULL);
564: _DIAGASSERT(q != NULL);
565:
1.18 christos 566: return strcoll(*(const char * const *)p, *(const char * const *)q);
1.12 christos 567: }
568:
569: static int
1.18 christos 570: glob1(Char *pattern, glob_t *pglob, size_t *limit)
1.12 christos 571: {
572: Char pathbuf[MAXPATHLEN+1];
573:
574: _DIAGASSERT(pattern != NULL);
575: _DIAGASSERT(pglob != NULL);
576:
577: /* A null pathname is invalid -- POSIX 1003.1 sect. 2.4. */
578: if (*pattern == EOS)
1.18 christos 579: return 0;
1.12 christos 580: /*
581: * we save one character so that we can use ptr >= limit,
582: * in the general case when we are appending non nul chars only.
583: */
1.18 christos 584: return glob2(pathbuf, pathbuf,
585: pathbuf + (sizeof(pathbuf) / sizeof(*pathbuf)) - 1, pattern,
586: pglob, limit);
1.12 christos 587: }
588:
589: /*
590: * The functions glob2 and glob3 are mutually recursive; there is one level
591: * of recursion for each segment in the pattern that contains one or more
592: * meta characters.
593: */
594: static int
1.18 christos 595: glob2(Char *pathbuf, Char *pathend, Char *pathlim, Char *pattern, glob_t *pglob,
596: size_t *limit)
1.12 christos 597: {
598: __gl_stat_t sb;
599: Char *p, *q;
600: int anymeta;
1.21 christos 601: Char *pend;
602: ptrdiff_t diff;
1.12 christos 603:
604: _DIAGASSERT(pathbuf != NULL);
605: _DIAGASSERT(pathend != NULL);
606: _DIAGASSERT(pattern != NULL);
607: _DIAGASSERT(pglob != NULL);
608:
609: /*
610: * Loop over pattern segments until end of pattern or until
611: * segment with meta character found.
612: */
613: for (anymeta = 0;;) {
614: if (*pattern == EOS) { /* End of pattern? */
615: *pathend = EOS;
616: if (g_lstat(pathbuf, &sb, pglob))
1.18 christos 617: return 0;
1.12 christos 618:
1.23.12.1! matt 619: if ((pglob->gl_flags & GLOB_LIMIT) &&
! 620: limit[GLOB_INDEX_STAT]++ >= GLOB_LIMIT_STAT) {
! 621: errno = 0;
! 622: *pathend++ = SEP;
! 623: *pathend = EOS;
! 624: return GLOB_NOSPACE;
! 625: }
1.12 christos 626: if (((pglob->gl_flags & GLOB_MARK) &&
627: pathend[-1] != SEP) && (S_ISDIR(sb.st_mode) ||
628: (S_ISLNK(sb.st_mode) &&
629: (g_stat(pathbuf, &sb, pglob) == 0) &&
630: S_ISDIR(sb.st_mode)))) {
631: if (pathend >= pathlim)
1.18 christos 632: return GLOB_ABORTED;
1.12 christos 633: *pathend++ = SEP;
634: *pathend = EOS;
635: }
636: ++pglob->gl_matchc;
1.18 christos 637: return globextend(pathbuf, pglob, limit);
1.12 christos 638: }
639:
640: /* Find end of next segment, copy tentatively to pathend. */
641: q = pathend;
642: p = pattern;
643: while (*p != EOS && *p != SEP) {
644: if (ismeta(*p))
645: anymeta = 1;
646: if (q >= pathlim)
647: return GLOB_ABORTED;
648: *q++ = *p++;
649: }
650:
1.20 christos 651: /*
1.21 christos 652: * No expansion, or path ends in slash-dot shash-dot-dot,
1.20 christos 653: * do next segment.
654: */
1.21 christos 655: if (pglob->gl_flags & GLOB_PERIOD) {
656: for (pend = pathend; pend > pathbuf && pend[-1] == '/';
657: pend--)
658: continue;
659: diff = pend - pathbuf;
660: } else {
661: /* XXX: GCC */
662: diff = 0;
663: pend = pathend;
664: }
665:
666: if ((!anymeta) ||
667: ((pglob->gl_flags & GLOB_PERIOD) &&
668: (diff >= 1 && pend[-1] == DOT) &&
669: (diff >= 2 && (pend[-2] == SLASH || pend[-2] == DOT)) &&
670: (diff < 3 || pend[-3] == SLASH))) {
1.12 christos 671: pathend = q;
672: pattern = p;
673: while (*pattern == SEP) {
674: if (pathend >= pathlim)
675: return GLOB_ABORTED;
676: *pathend++ = *pattern++;
677: }
678: } else /* Need expansion, recurse. */
1.18 christos 679: return glob3(pathbuf, pathend, pathlim, pattern, p,
680: pglob, limit);
1.12 christos 681: }
682: /* NOTREACHED */
683: }
684:
685: static int
1.18 christos 686: glob3(Char *pathbuf, Char *pathend, Char *pathlim, Char *pattern,
687: Char *restpattern, glob_t *pglob, size_t *limit)
1.12 christos 688: {
689: struct dirent *dp;
690: DIR *dirp;
691: int error;
692: char buf[MAXPATHLEN];
693:
694: /*
695: * The readdirfunc declaration can't be prototyped, because it is
696: * assigned, below, to two functions which are prototyped in glob.h
697: * and dirent.h as taking pointers to differently typed opaque
698: * structures.
699: */
1.18 christos 700: struct dirent *(*readdirfunc)(void *);
1.12 christos 701:
702: _DIAGASSERT(pathbuf != NULL);
703: _DIAGASSERT(pathend != NULL);
704: _DIAGASSERT(pattern != NULL);
705: _DIAGASSERT(restpattern != NULL);
706: _DIAGASSERT(pglob != NULL);
707:
708: *pathend = EOS;
709: errno = 0;
710:
711: if ((dirp = g_opendir(pathbuf, pglob)) == NULL) {
712: if (pglob->gl_errfunc) {
713: if (g_Ctoc(pathbuf, buf, sizeof(buf)))
1.18 christos 714: return GLOB_ABORTED;
1.12 christos 715: if (pglob->gl_errfunc(buf, errno) ||
716: pglob->gl_flags & GLOB_ERR)
1.18 christos 717: return GLOB_ABORTED;
1.12 christos 718: }
719: /*
720: * Posix/XOpen: glob should return when it encounters a
721: * directory that it cannot open or read
722: * XXX: Should we ignore ENOTDIR and ENOENT though?
723: * I think that Posix had in mind EPERM...
724: */
725: if (pglob->gl_flags & GLOB_ERR)
1.18 christos 726: return GLOB_ABORTED;
1.12 christos 727:
1.18 christos 728: return 0;
1.12 christos 729: }
730:
731: error = 0;
732:
733: /* Search directory for matching names. */
734: if (pglob->gl_flags & GLOB_ALTDIRFUNC)
735: readdirfunc = pglob->gl_readdir;
736: else
737: readdirfunc = (struct dirent *(*)__P((void *))) readdir;
738: while ((dp = (*readdirfunc)(dirp)) != NULL) {
739: u_char *sc;
740: Char *dc;
741:
1.23.12.1! matt 742: if ((pglob->gl_flags & GLOB_LIMIT) &&
! 743: limit[GLOB_INDEX_READDIR]++ >= GLOB_LIMIT_READDIR) {
! 744: errno = 0;
! 745: *pathend++ = SEP;
! 746: *pathend = EOS;
! 747: return GLOB_NOSPACE;
! 748: }
! 749:
1.19 christos 750: /*
751: * Initial DOT must be matched literally, unless we have
752: * GLOB_PERIOD set.
753: */
754: if ((pglob->gl_flags & GLOB_PERIOD) == 0)
755: if (dp->d_name[0] == DOT && *pattern != DOT)
756: continue;
1.12 christos 757: /*
1.22 christos 758: * If GLOB_NO_DOTDIRS is set, . and .. vanish.
759: */
760: if ((pglob->gl_flags & GLOB_NO_DOTDIRS) &&
761: (dp->d_name[0] == DOT) &&
762: ((dp->d_name[1] == EOS) ||
763: ((dp->d_name[1] == DOT) && (dp->d_name[2] == EOS))))
764: continue;
765: /*
1.12 christos 766: * The resulting string contains EOS, so we can
767: * use the pathlim character, if it is the nul
768: */
769: for (sc = (u_char *) dp->d_name, dc = pathend;
770: dc <= pathlim && (*dc++ = *sc++) != EOS;)
771: continue;
772:
773: /*
774: * Have we filled the buffer without seeing EOS?
775: */
776: if (dc > pathlim && *pathlim != EOS) {
777: /*
778: * Abort when requested by caller, otherwise
779: * reset pathend back to last SEP and continue
780: * with next dir entry.
781: */
782: if (pglob->gl_flags & GLOB_ERR) {
783: error = GLOB_ABORTED;
784: break;
785: }
786: else {
787: *pathend = EOS;
788: continue;
789: }
790: }
791:
792: if (!match(pathend, pattern, restpattern)) {
793: *pathend = EOS;
794: continue;
795: }
1.23.12.1! matt 796: error = glob2(pathbuf, --dc, pathlim, restpattern, pglob,
! 797: limit);
1.12 christos 798: if (error)
799: break;
800: }
801:
802: if (pglob->gl_flags & GLOB_ALTDIRFUNC)
803: (*pglob->gl_closedir)(dirp);
804: else
805: closedir(dirp);
806:
807: /*
808: * Again Posix X/Open issue with regards to error handling.
809: */
810: if ((error || errno) && (pglob->gl_flags & GLOB_ERR))
1.18 christos 811: return GLOB_ABORTED;
1.12 christos 812:
1.18 christos 813: return error;
1.12 christos 814: }
815:
816:
817: /*
1.17 christos 818: * Extend the gl_pathv member of a glob_t structure to accommodate a new item,
1.12 christos 819: * add the new item, and update gl_pathc.
820: *
821: * This assumes the BSD realloc, which only copies the block when its size
822: * crosses a power-of-two boundary; for v7 realloc, this would cause quadratic
823: * behavior.
824: *
825: * Return 0 if new item added, error code if memory couldn't be allocated.
826: *
827: * Invariant of the glob_t structure:
828: * Either gl_pathc is zero and gl_pathv is NULL; or gl_pathc > 0 and
829: * gl_pathv points to (gl_offs + gl_pathc + 1) items.
830: */
831: static int
1.18 christos 832: globextend(const Char *path, glob_t *pglob, size_t *limit)
1.12 christos 833: {
834: char **pathv;
1.16 christos 835: size_t i, newsize, len;
1.12 christos 836: char *copy;
837: const Char *p;
838:
839: _DIAGASSERT(path != NULL);
840: _DIAGASSERT(pglob != NULL);
841:
842: newsize = sizeof(*pathv) * (2 + pglob->gl_pathc + pglob->gl_offs);
843: pathv = pglob->gl_pathv ? realloc(pglob->gl_pathv, newsize) :
844: malloc(newsize);
845: if (pathv == NULL)
1.18 christos 846: return GLOB_NOSPACE;
1.12 christos 847:
848: if (pglob->gl_pathv == NULL && pglob->gl_offs > 0) {
849: /* first time around -- clear initial gl_offs items */
850: pathv += pglob->gl_offs;
1.16 christos 851: for (i = pglob->gl_offs + 1; --i > 0; )
1.12 christos 852: *--pathv = NULL;
853: }
854: pglob->gl_pathv = pathv;
855:
856: for (p = path; *p++;)
857: continue;
858: len = (size_t)(p - path);
1.23.12.1! matt 859: limit[GLOB_INDEX_MALLOC] += len;
1.12 christos 860: if ((copy = malloc(len)) != NULL) {
861: if (g_Ctoc(path, copy, len)) {
862: free(copy);
1.18 christos 863: return GLOB_ABORTED;
1.12 christos 864: }
865: pathv[pglob->gl_offs + pglob->gl_pathc++] = copy;
866: }
867: pathv[pglob->gl_offs + pglob->gl_pathc] = NULL;
868:
1.23.12.1! matt 869: if ((pglob->gl_flags & GLOB_LIMIT) &&
! 870: (newsize + limit[GLOB_INDEX_MALLOC]) >= GLOB_LIMIT_MALLOC) {
1.12 christos 871: errno = 0;
1.18 christos 872: return GLOB_NOSPACE;
1.12 christos 873: }
874:
1.18 christos 875: return copy == NULL ? GLOB_NOSPACE : 0;
1.12 christos 876: }
877:
878:
879: /*
880: * pattern matching function for filenames. Each occurrence of the *
881: * pattern causes a recursion level.
882: */
883: static int
1.18 christos 884: match(Char *name, Char *pat, Char *patend)
1.12 christos 885: {
886: int ok, negate_range;
887: Char c, k;
888:
889: _DIAGASSERT(name != NULL);
890: _DIAGASSERT(pat != NULL);
891: _DIAGASSERT(patend != NULL);
892:
893: while (pat < patend) {
894: c = *pat++;
895: switch (c & M_MASK) {
896: case M_ALL:
897: if (pat == patend)
1.18 christos 898: return 1;
1.12 christos 899: do
900: if (match(name, pat, patend))
1.18 christos 901: return 1;
1.12 christos 902: while (*name++ != EOS);
1.18 christos 903: return 0;
1.12 christos 904: case M_ONE:
905: if (*name++ == EOS)
1.18 christos 906: return 0;
1.12 christos 907: break;
908: case M_SET:
909: ok = 0;
910: if ((k = *name++) == EOS)
1.18 christos 911: return 0;
1.12 christos 912: if ((negate_range = ((*pat & M_MASK) == M_NOT)) != EOS)
913: ++pat;
914: while (((c = *pat++) & M_MASK) != M_END)
915: if ((*pat & M_MASK) == M_RNG) {
916: if (c <= k && k <= pat[1])
917: ok = 1;
918: pat += 2;
919: } else if (c == k)
920: ok = 1;
921: if (ok == negate_range)
1.18 christos 922: return 0;
1.12 christos 923: break;
924: default:
925: if (*name++ != c)
1.18 christos 926: return 0;
1.12 christos 927: break;
928: }
929: }
1.18 christos 930: return *name == EOS;
1.12 christos 931: }
932:
933: /* Free allocated data belonging to a glob_t structure. */
934: void
1.18 christos 935: globfree(glob_t *pglob)
1.12 christos 936: {
1.16 christos 937: size_t i;
1.12 christos 938: char **pp;
939:
940: _DIAGASSERT(pglob != NULL);
941:
942: if (pglob->gl_pathv != NULL) {
943: pp = pglob->gl_pathv + pglob->gl_offs;
944: for (i = pglob->gl_pathc; i--; ++pp)
945: if (*pp)
946: free(*pp);
947: free(pglob->gl_pathv);
948: pglob->gl_pathv = NULL;
949: pglob->gl_pathc = 0;
950: }
951: }
952:
953: static DIR *
1.18 christos 954: g_opendir(Char *str, glob_t *pglob)
1.12 christos 955: {
956: char buf[MAXPATHLEN];
957:
958: _DIAGASSERT(str != NULL);
959: _DIAGASSERT(pglob != NULL);
960:
961: if (!*str)
962: (void)strlcpy(buf, ".", sizeof(buf));
963: else {
964: if (g_Ctoc(str, buf, sizeof(buf)))
965: return NULL;
966: }
967:
968: if (pglob->gl_flags & GLOB_ALTDIRFUNC)
1.18 christos 969: return (*pglob->gl_opendir)(buf);
1.12 christos 970:
1.18 christos 971: return opendir(buf);
1.12 christos 972: }
973:
974: static int
1.18 christos 975: g_lstat(Char *fn, __gl_stat_t *sb, glob_t *pglob)
1.12 christos 976: {
977: char buf[MAXPATHLEN];
978:
979: _DIAGASSERT(fn != NULL);
980: _DIAGASSERT(sb != NULL);
981: _DIAGASSERT(pglob != NULL);
982:
983: if (g_Ctoc(fn, buf, sizeof(buf)))
984: return -1;
985: if (pglob->gl_flags & GLOB_ALTDIRFUNC)
1.18 christos 986: return (*pglob->gl_lstat)(buf, sb);
987: return lstat(buf, sb);
1.12 christos 988: }
989:
990: static int
1.18 christos 991: g_stat(Char *fn, __gl_stat_t *sb, glob_t *pglob)
1.12 christos 992: {
993: char buf[MAXPATHLEN];
994:
995: _DIAGASSERT(fn != NULL);
996: _DIAGASSERT(sb != NULL);
997: _DIAGASSERT(pglob != NULL);
998:
999: if (g_Ctoc(fn, buf, sizeof(buf)))
1000: return -1;
1001: if (pglob->gl_flags & GLOB_ALTDIRFUNC)
1.18 christos 1002: return (*pglob->gl_stat)(buf, sb);
1003: return stat(buf, sb);
1.12 christos 1004: }
1005:
1006: static Char *
1.18 christos 1007: g_strchr(const Char *str, int ch)
1.12 christos 1008: {
1009:
1010: _DIAGASSERT(str != NULL);
1011:
1012: do {
1013: if (*str == ch)
1.14 christos 1014: return __UNCONST(str);
1.12 christos 1015: } while (*str++);
1016: return NULL;
1017: }
1018:
1019: static int
1.18 christos 1020: g_Ctoc(const Char *str, char *buf, size_t len)
1.12 christos 1021: {
1022: char *dc;
1023:
1024: _DIAGASSERT(str != NULL);
1025: _DIAGASSERT(buf != NULL);
1026:
1027: if (len == 0)
1028: return 1;
1029:
1030: for (dc = buf; len && (*dc++ = *str++) != EOS; len--)
1031: continue;
1032:
1033: return len == 0;
1034: }
1035:
1036: #ifdef DEBUG
1037: static void
1.18 christos 1038: qprintf(const char *str, Char *s)
1.12 christos 1039: {
1040: Char *p;
1041:
1042: _DIAGASSERT(str != NULL);
1043: _DIAGASSERT(s != NULL);
1044:
1045: (void)printf("%s:\n", str);
1046: for (p = s; *p; p++)
1047: (void)printf("%c", CHAR(*p));
1048: (void)printf("\n");
1049: for (p = s; *p; p++)
1050: (void)printf("%c", *p & M_PROTECT ? '"' : ' ');
1051: (void)printf("\n");
1052: for (p = s; *p; p++)
1053: (void)printf("%c", ismeta(*p) ? '_' : ' ');
1054: (void)printf("\n");
1055: }
1056: #endif
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