glob.c revision 228754
11573Srgrimes/* 21573Srgrimes * Copyright (c) 1989, 1993 31573Srgrimes * The Regents of the University of California. All rights reserved. 41573Srgrimes * 51573Srgrimes * This code is derived from software contributed to Berkeley by 61573Srgrimes * Guido van Rossum. 71573Srgrimes * 8227753Stheraven * Copyright (c) 2011 The FreeBSD Foundation 9227753Stheraven * All rights reserved. 10227753Stheraven * Portions of this software were developed by David Chisnall 11227753Stheraven * under sponsorship from the FreeBSD Foundation. 12227753Stheraven * 131573Srgrimes * Redistribution and use in source and binary forms, with or without 141573Srgrimes * modification, are permitted provided that the following conditions 151573Srgrimes * are met: 161573Srgrimes * 1. Redistributions of source code must retain the above copyright 171573Srgrimes * notice, this list of conditions and the following disclaimer. 181573Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 191573Srgrimes * notice, this list of conditions and the following disclaimer in the 201573Srgrimes * documentation and/or other materials provided with the distribution. 211573Srgrimes * 4. Neither the name of the University nor the names of its contributors 221573Srgrimes * may be used to endorse or promote products derived from this software 231573Srgrimes * without specific prior written permission. 241573Srgrimes * 251573Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 261573Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 271573Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 281573Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 291573Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 301573Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 311573Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 321573Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 331573Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 341573Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 351573Srgrimes * SUCH DAMAGE. 361573Srgrimes */ 371573Srgrimes 381573Srgrimes#if defined(LIBC_SCCS) && !defined(lint) 391573Srgrimesstatic char sccsid[] = "@(#)glob.c 8.3 (Berkeley) 10/13/93"; 401573Srgrimes#endif /* LIBC_SCCS and not lint */ 4190045Sobrien#include <sys/cdefs.h> 4290045Sobrien__FBSDID("$FreeBSD: head/lib/libc/gen/glob.c 228754 2011-12-20 22:56:13Z eadler $"); 431573Srgrimes 441573Srgrimes/* 451573Srgrimes * glob(3) -- a superset of the one defined in POSIX 1003.2. 461573Srgrimes * 471573Srgrimes * The [!...] convention to negate a range is supported (SysV, Posix, ksh). 481573Srgrimes * 491573Srgrimes * Optional extra services, controlled by flags not defined by POSIX: 501573Srgrimes * 511573Srgrimes * GLOB_QUOTE: 521573Srgrimes * Escaping convention: \ inhibits any special meaning the following 531573Srgrimes * character might have (except \ at end of string is retained). 541573Srgrimes * GLOB_MAGCHAR: 551573Srgrimes * Set in gl_flags if pattern contained a globbing character. 561573Srgrimes * GLOB_NOMAGIC: 571573Srgrimes * Same as GLOB_NOCHECK, but it will only append pattern if it did 581573Srgrimes * not contain any magic characters. [Used in csh style globbing] 591573Srgrimes * GLOB_ALTDIRFUNC: 601573Srgrimes * Use alternately specified directory access functions. 611573Srgrimes * GLOB_TILDE: 621573Srgrimes * expand ~user/foo to the /home/dir/of/user/foo 631573Srgrimes * GLOB_BRACE: 648870Srgrimes * expand {1,2}{a,b} to 1a 1b 2a 2b 651573Srgrimes * gl_matchc: 661573Srgrimes * Number of matches in the current invocation of glob. 671573Srgrimes */ 681573Srgrimes 69132817Stjr/* 70132817Stjr * Some notes on multibyte character support: 71132817Stjr * 1. Patterns with illegal byte sequences match nothing - even if 72132817Stjr * GLOB_NOCHECK is specified. 73132817Stjr * 2. Illegal byte sequences in filenames are handled by treating them as 74132817Stjr * single-byte characters with a value of the first byte of the sequence 75132817Stjr * cast to wchar_t. 76132817Stjr * 3. State-dependent encodings are not currently supported. 77132817Stjr */ 78132817Stjr 791573Srgrimes#include <sys/param.h> 801573Srgrimes#include <sys/stat.h> 811573Srgrimes 821573Srgrimes#include <ctype.h> 831573Srgrimes#include <dirent.h> 841573Srgrimes#include <errno.h> 851573Srgrimes#include <glob.h> 86132817Stjr#include <limits.h> 871573Srgrimes#include <pwd.h> 88132817Stjr#include <stdint.h> 891573Srgrimes#include <stdio.h> 901573Srgrimes#include <stdlib.h> 911573Srgrimes#include <string.h> 921573Srgrimes#include <unistd.h> 93132817Stjr#include <wchar.h> 941573Srgrimes 9519276Sache#include "collate.h" 9619276Sache 971573Srgrimes#define DOLLAR '$' 981573Srgrimes#define DOT '.' 991573Srgrimes#define EOS '\0' 1001573Srgrimes#define LBRACKET '[' 1011573Srgrimes#define NOT '!' 1021573Srgrimes#define QUESTION '?' 1031573Srgrimes#define QUOTE '\\' 1041573Srgrimes#define RANGE '-' 1051573Srgrimes#define RBRACKET ']' 1061573Srgrimes#define SEP '/' 1071573Srgrimes#define STAR '*' 1081573Srgrimes#define TILDE '~' 1091573Srgrimes#define UNDERSCORE '_' 1101573Srgrimes#define LBRACE '{' 1111573Srgrimes#define RBRACE '}' 1121573Srgrimes#define SLASH '/' 1131573Srgrimes#define COMMA ',' 1141573Srgrimes 1151573Srgrimes#ifndef DEBUG 1161573Srgrimes 117132817Stjr#define M_QUOTE 0x8000000000ULL 118132817Stjr#define M_PROTECT 0x4000000000ULL 119132817Stjr#define M_MASK 0xffffffffffULL 120132817Stjr#define M_CHAR 0x00ffffffffULL 1211573Srgrimes 122132817Stjrtypedef uint_fast64_t Char; 1231573Srgrimes 1241573Srgrimes#else 1251573Srgrimes 1261573Srgrimes#define M_QUOTE 0x80 1271573Srgrimes#define M_PROTECT 0x40 1281573Srgrimes#define M_MASK 0xff 129132817Stjr#define M_CHAR 0x7f 1301573Srgrimes 1311573Srgrimestypedef char Char; 1321573Srgrimes 1331573Srgrimes#endif 1341573Srgrimes 1351573Srgrimes 136132817Stjr#define CHAR(c) ((Char)((c)&M_CHAR)) 1371573Srgrimes#define META(c) ((Char)((c)|M_QUOTE)) 1381573Srgrimes#define M_ALL META('*') 1391573Srgrimes#define M_END META(']') 1401573Srgrimes#define M_NOT META('!') 1411573Srgrimes#define M_ONE META('?') 1421573Srgrimes#define M_RNG META('-') 1431573Srgrimes#define M_SET META('[') 1441573Srgrimes#define ismeta(c) (((c)&M_QUOTE) != 0) 1451573Srgrimes 1461573Srgrimes 14790045Sobrienstatic int compare(const void *, const void *); 148158812Sachestatic int g_Ctoc(const Char *, char *, size_t); 14990045Sobrienstatic int g_lstat(Char *, struct stat *, glob_t *); 15090045Sobrienstatic DIR *g_opendir(Char *, glob_t *); 151180021Smtmstatic const Char *g_strchr(const Char *, wchar_t); 1521573Srgrimes#ifdef notdef 15390045Sobrienstatic Char *g_strcat(Char *, const Char *); 1541573Srgrimes#endif 15590045Sobrienstatic int g_stat(Char *, struct stat *, glob_t *); 156158812Sachestatic int glob0(const Char *, glob_t *, size_t *); 157158812Sachestatic int glob1(Char *, glob_t *, size_t *); 158158812Sachestatic int glob2(Char *, Char *, Char *, Char *, glob_t *, size_t *); 159158812Sachestatic int glob3(Char *, Char *, Char *, Char *, Char *, glob_t *, size_t *); 160158812Sachestatic int globextend(const Char *, glob_t *, size_t *); 16174963Speterstatic const Char * 16290045Sobrien globtilde(const Char *, Char *, size_t, glob_t *); 163158812Sachestatic int globexp1(const Char *, glob_t *, size_t *); 164158812Sachestatic int globexp2(const Char *, const Char *, glob_t *, int *, size_t *); 16590045Sobrienstatic int match(Char *, Char *, Char *); 1661573Srgrimes#ifdef DEBUG 16790045Sobrienstatic void qprintf(const char *, Char *); 1681573Srgrimes#endif 1691573Srgrimes 1701573Srgrimesint 171228754Seadlerglob(const char * __restrict pattern, int flags, 172228754Seadler int (*errfunc)(const char *, int), glob_t * __restrict pglob) 1731573Srgrimes{ 174159294Sdelphij const char *patnext; 175158812Sache size_t limit; 176132817Stjr Char *bufnext, *bufend, patbuf[MAXPATHLEN], prot; 177132817Stjr mbstate_t mbs; 178132817Stjr wchar_t wc; 179132817Stjr size_t clen; 1801573Srgrimes 181159294Sdelphij patnext = pattern; 1821573Srgrimes if (!(flags & GLOB_APPEND)) { 1831573Srgrimes pglob->gl_pathc = 0; 1841573Srgrimes pglob->gl_pathv = NULL; 1851573Srgrimes if (!(flags & GLOB_DOOFFS)) 1861573Srgrimes pglob->gl_offs = 0; 1871573Srgrimes } 18880525Smikeh if (flags & GLOB_LIMIT) { 18974469Sjlemon limit = pglob->gl_matchc; 19080525Smikeh if (limit == 0) 19180525Smikeh limit = ARG_MAX; 19280525Smikeh } else 19374469Sjlemon limit = 0; 1941573Srgrimes pglob->gl_flags = flags & ~GLOB_MAGCHAR; 1951573Srgrimes pglob->gl_errfunc = errfunc; 1961573Srgrimes pglob->gl_matchc = 0; 1971573Srgrimes 1981573Srgrimes bufnext = patbuf; 19974963Speter bufend = bufnext + MAXPATHLEN - 1; 200132817Stjr if (flags & GLOB_NOESCAPE) { 201132817Stjr memset(&mbs, 0, sizeof(mbs)); 202132817Stjr while (bufend - bufnext >= MB_CUR_MAX) { 203132817Stjr clen = mbrtowc(&wc, patnext, MB_LEN_MAX, &mbs); 204132817Stjr if (clen == (size_t)-1 || clen == (size_t)-2) 205132817Stjr return (GLOB_NOMATCH); 206132817Stjr else if (clen == 0) 207132817Stjr break; 208132817Stjr *bufnext++ = wc; 209132817Stjr patnext += clen; 210132817Stjr } 211132817Stjr } else { 2121573Srgrimes /* Protect the quoted characters. */ 213132817Stjr memset(&mbs, 0, sizeof(mbs)); 214132817Stjr while (bufend - bufnext >= MB_CUR_MAX) { 215132817Stjr if (*patnext == QUOTE) { 216132817Stjr if (*++patnext == EOS) { 217132817Stjr *bufnext++ = QUOTE | M_PROTECT; 218132817Stjr continue; 2191573Srgrimes } 220132817Stjr prot = M_PROTECT; 221132817Stjr } else 222132817Stjr prot = 0; 223132817Stjr clen = mbrtowc(&wc, patnext, MB_LEN_MAX, &mbs); 224132817Stjr if (clen == (size_t)-1 || clen == (size_t)-2) 225132817Stjr return (GLOB_NOMATCH); 226132817Stjr else if (clen == 0) 227132817Stjr break; 228132817Stjr *bufnext++ = wc | prot; 229132817Stjr patnext += clen; 230132817Stjr } 2311573Srgrimes } 2321573Srgrimes *bufnext = EOS; 2331573Srgrimes 2341573Srgrimes if (flags & GLOB_BRACE) 23574469Sjlemon return globexp1(patbuf, pglob, &limit); 2361573Srgrimes else 23774469Sjlemon return glob0(patbuf, pglob, &limit); 2381573Srgrimes} 2391573Srgrimes 2401573Srgrimes/* 2411573Srgrimes * Expand recursively a glob {} pattern. When there is no more expansion 2421573Srgrimes * invoke the standard globbing routine to glob the rest of the magic 2431573Srgrimes * characters 2441573Srgrimes */ 24574963Speterstatic int 246159294Sdelphijglobexp1(const Char *pattern, glob_t *pglob, size_t *limit) 2471573Srgrimes{ 2481573Srgrimes const Char* ptr = pattern; 2491573Srgrimes int rv; 2501573Srgrimes 2511573Srgrimes /* Protect a single {}, for find(1), like csh */ 2521573Srgrimes if (pattern[0] == LBRACE && pattern[1] == RBRACE && pattern[2] == EOS) 25374469Sjlemon return glob0(pattern, pglob, limit); 2541573Srgrimes 255180021Smtm while ((ptr = g_strchr(ptr, LBRACE)) != NULL) 25674469Sjlemon if (!globexp2(ptr, pattern, pglob, &rv, limit)) 2571573Srgrimes return rv; 2581573Srgrimes 25974469Sjlemon return glob0(pattern, pglob, limit); 2601573Srgrimes} 2611573Srgrimes 2621573Srgrimes 2631573Srgrimes/* 2641573Srgrimes * Recursive brace globbing helper. Tries to expand a single brace. 2651573Srgrimes * If it succeeds then it invokes globexp1 with the new pattern. 2661573Srgrimes * If it fails then it tries to glob the rest of the pattern and returns. 2671573Srgrimes */ 26874963Speterstatic int 269159294Sdelphijglobexp2(const Char *ptr, const Char *pattern, glob_t *pglob, int *rv, size_t *limit) 2701573Srgrimes{ 2711573Srgrimes int i; 2721573Srgrimes Char *lm, *ls; 273150137Sache const Char *pe, *pm, *pm1, *pl; 27474963Speter Char patbuf[MAXPATHLEN]; 2751573Srgrimes 2761573Srgrimes /* copy part up to the brace */ 2771573Srgrimes for (lm = patbuf, pm = pattern; pm != ptr; *lm++ = *pm++) 2781573Srgrimes continue; 27974963Speter *lm = EOS; 2801573Srgrimes ls = lm; 2811573Srgrimes 2821573Srgrimes /* Find the balanced brace */ 2831573Srgrimes for (i = 0, pe = ++ptr; *pe; pe++) 2841573Srgrimes if (*pe == LBRACKET) { 2851573Srgrimes /* Ignore everything between [] */ 2861573Srgrimes for (pm = pe++; *pe != RBRACKET && *pe != EOS; pe++) 2871573Srgrimes continue; 2881573Srgrimes if (*pe == EOS) { 2898870Srgrimes /* 2901573Srgrimes * We could not find a matching RBRACKET. 2911573Srgrimes * Ignore and just look for RBRACE 2921573Srgrimes */ 2931573Srgrimes pe = pm; 2941573Srgrimes } 2951573Srgrimes } 2961573Srgrimes else if (*pe == LBRACE) 2971573Srgrimes i++; 2981573Srgrimes else if (*pe == RBRACE) { 2991573Srgrimes if (i == 0) 3001573Srgrimes break; 3011573Srgrimes i--; 3021573Srgrimes } 3031573Srgrimes 3041573Srgrimes /* Non matching braces; just glob the pattern */ 3051573Srgrimes if (i != 0 || *pe == EOS) { 30674469Sjlemon *rv = glob0(patbuf, pglob, limit); 3071573Srgrimes return 0; 3081573Srgrimes } 3091573Srgrimes 3101573Srgrimes for (i = 0, pl = pm = ptr; pm <= pe; pm++) 3111573Srgrimes switch (*pm) { 3121573Srgrimes case LBRACKET: 3131573Srgrimes /* Ignore everything between [] */ 314150137Sache for (pm1 = pm++; *pm != RBRACKET && *pm != EOS; pm++) 3151573Srgrimes continue; 3161573Srgrimes if (*pm == EOS) { 3178870Srgrimes /* 3181573Srgrimes * We could not find a matching RBRACKET. 3191573Srgrimes * Ignore and just look for RBRACE 3201573Srgrimes */ 321150137Sache pm = pm1; 3221573Srgrimes } 3231573Srgrimes break; 3241573Srgrimes 3251573Srgrimes case LBRACE: 3261573Srgrimes i++; 3271573Srgrimes break; 3281573Srgrimes 3291573Srgrimes case RBRACE: 3301573Srgrimes if (i) { 3311573Srgrimes i--; 3321573Srgrimes break; 3331573Srgrimes } 3341573Srgrimes /* FALLTHROUGH */ 3351573Srgrimes case COMMA: 3361573Srgrimes if (i && *pm == COMMA) 3371573Srgrimes break; 3381573Srgrimes else { 3391573Srgrimes /* Append the current string */ 3401573Srgrimes for (lm = ls; (pl < pm); *lm++ = *pl++) 3411573Srgrimes continue; 3428870Srgrimes /* 3431573Srgrimes * Append the rest of the pattern after the 3441573Srgrimes * closing brace 3451573Srgrimes */ 3461573Srgrimes for (pl = pe + 1; (*lm++ = *pl++) != EOS;) 3471573Srgrimes continue; 3481573Srgrimes 3491573Srgrimes /* Expand the current pattern */ 3501573Srgrimes#ifdef DEBUG 3511573Srgrimes qprintf("globexp2:", patbuf); 3521573Srgrimes#endif 35374469Sjlemon *rv = globexp1(patbuf, pglob, limit); 3541573Srgrimes 3551573Srgrimes /* move after the comma, to the next string */ 3561573Srgrimes pl = pm + 1; 3571573Srgrimes } 3581573Srgrimes break; 3591573Srgrimes 3601573Srgrimes default: 3611573Srgrimes break; 3621573Srgrimes } 3631573Srgrimes *rv = 0; 3641573Srgrimes return 0; 3651573Srgrimes} 3661573Srgrimes 3671573Srgrimes 3681573Srgrimes 3691573Srgrimes/* 3701573Srgrimes * expand tilde from the passwd file. 3711573Srgrimes */ 3721573Srgrimesstatic const Char * 373159294Sdelphijglobtilde(const Char *pattern, Char *patbuf, size_t patbuf_len, glob_t *pglob) 3741573Srgrimes{ 3751573Srgrimes struct passwd *pwd; 3761573Srgrimes char *h; 3771573Srgrimes const Char *p; 37824158Simp Char *b, *eb; 3791573Srgrimes 3801573Srgrimes if (*pattern != TILDE || !(pglob->gl_flags & GLOB_TILDE)) 3811573Srgrimes return pattern; 3821573Srgrimes 38324158Simp /* 38424158Simp * Copy up to the end of the string or / 38524158Simp */ 38624158Simp eb = &patbuf[patbuf_len - 1]; 38724158Simp for (p = pattern + 1, h = (char *) patbuf; 38824158Simp h < (char *)eb && *p && *p != SLASH; *h++ = *p++) 3891573Srgrimes continue; 3901573Srgrimes 3911573Srgrimes *h = EOS; 3921573Srgrimes 3931573Srgrimes if (((char *) patbuf)[0] == EOS) { 3948870Srgrimes /* 39528820Simp * handle a plain ~ or ~/ by expanding $HOME first (iff 39628820Simp * we're not running setuid or setgid) and then trying 39728820Simp * the password file 3981573Srgrimes */ 399121667Stjr if (issetugid() != 0 || 40033664Sjb (h = getenv("HOME")) == NULL) { 40128836Sache if (((h = getlogin()) != NULL && 40228836Sache (pwd = getpwnam(h)) != NULL) || 40328836Sache (pwd = getpwuid(getuid())) != NULL) 40428836Sache h = pwd->pw_dir; 40528836Sache else 4061573Srgrimes return pattern; 4071573Srgrimes } 4081573Srgrimes } 4091573Srgrimes else { 4101573Srgrimes /* 4111573Srgrimes * Expand a ~user 4121573Srgrimes */ 4131573Srgrimes if ((pwd = getpwnam((char*) patbuf)) == NULL) 4141573Srgrimes return pattern; 4151573Srgrimes else 4161573Srgrimes h = pwd->pw_dir; 4171573Srgrimes } 4181573Srgrimes 4191573Srgrimes /* Copy the home directory */ 42024158Simp for (b = patbuf; b < eb && *h; *b++ = *h++) 4211573Srgrimes continue; 4228870Srgrimes 4231573Srgrimes /* Append the rest of the pattern */ 42424158Simp while (b < eb && (*b++ = *p++) != EOS) 4251573Srgrimes continue; 42624158Simp *b = EOS; 4271573Srgrimes 4281573Srgrimes return patbuf; 4291573Srgrimes} 4301573Srgrimes 4318870Srgrimes 4321573Srgrimes/* 4331573Srgrimes * The main glob() routine: compiles the pattern (optionally processing 4341573Srgrimes * quotes), calls glob1() to do the real pattern matching, and finally 4351573Srgrimes * sorts the list (unless unsorted operation is requested). Returns 0 436100217Smikeh * if things went well, nonzero if errors occurred. 4371573Srgrimes */ 4381573Srgrimesstatic int 439159294Sdelphijglob0(const Char *pattern, glob_t *pglob, size_t *limit) 4401573Srgrimes{ 4411573Srgrimes const Char *qpatnext; 442207981Sgordon int err; 443158812Sache size_t oldpathc; 444207981Sgordon Char *bufnext, c, patbuf[MAXPATHLEN]; 4451573Srgrimes 44674963Speter qpatnext = globtilde(pattern, patbuf, MAXPATHLEN, pglob); 4471573Srgrimes oldpathc = pglob->gl_pathc; 4481573Srgrimes bufnext = patbuf; 4491573Srgrimes 4501573Srgrimes /* We don't need to check for buffer overflow any more. */ 4511573Srgrimes while ((c = *qpatnext++) != EOS) { 4521573Srgrimes switch (c) { 4531573Srgrimes case LBRACKET: 4541573Srgrimes c = *qpatnext; 4551573Srgrimes if (c == NOT) 4561573Srgrimes ++qpatnext; 4571573Srgrimes if (*qpatnext == EOS || 458180021Smtm g_strchr(qpatnext+1, RBRACKET) == NULL) { 4591573Srgrimes *bufnext++ = LBRACKET; 4601573Srgrimes if (c == NOT) 4611573Srgrimes --qpatnext; 4621573Srgrimes break; 4631573Srgrimes } 4641573Srgrimes *bufnext++ = M_SET; 4651573Srgrimes if (c == NOT) 4661573Srgrimes *bufnext++ = M_NOT; 4671573Srgrimes c = *qpatnext++; 4681573Srgrimes do { 4691573Srgrimes *bufnext++ = CHAR(c); 4701573Srgrimes if (*qpatnext == RANGE && 4711573Srgrimes (c = qpatnext[1]) != RBRACKET) { 4721573Srgrimes *bufnext++ = M_RNG; 4731573Srgrimes *bufnext++ = CHAR(c); 4741573Srgrimes qpatnext += 2; 4751573Srgrimes } 4761573Srgrimes } while ((c = *qpatnext++) != RBRACKET); 4771573Srgrimes pglob->gl_flags |= GLOB_MAGCHAR; 4781573Srgrimes *bufnext++ = M_END; 4791573Srgrimes break; 4801573Srgrimes case QUESTION: 4811573Srgrimes pglob->gl_flags |= GLOB_MAGCHAR; 4821573Srgrimes *bufnext++ = M_ONE; 4831573Srgrimes break; 4841573Srgrimes case STAR: 4851573Srgrimes pglob->gl_flags |= GLOB_MAGCHAR; 4868870Srgrimes /* collapse adjacent stars to one, 4871573Srgrimes * to avoid exponential behavior 4881573Srgrimes */ 4891573Srgrimes if (bufnext == patbuf || bufnext[-1] != M_ALL) 4901573Srgrimes *bufnext++ = M_ALL; 4911573Srgrimes break; 4921573Srgrimes default: 4931573Srgrimes *bufnext++ = CHAR(c); 4941573Srgrimes break; 4951573Srgrimes } 4961573Srgrimes } 4971573Srgrimes *bufnext = EOS; 4981573Srgrimes#ifdef DEBUG 4991573Srgrimes qprintf("glob0:", patbuf); 5001573Srgrimes#endif 5011573Srgrimes 50274469Sjlemon if ((err = glob1(patbuf, pglob, limit)) != 0) 5031573Srgrimes return(err); 5041573Srgrimes 5051573Srgrimes /* 5068870Srgrimes * If there was no match we are going to append the pattern 5071573Srgrimes * if GLOB_NOCHECK was specified or if GLOB_NOMAGIC was specified 5081573Srgrimes * and the pattern did not contain any magic characters 5091573Srgrimes * GLOB_NOMAGIC is there just for compatibility with csh. 5101573Srgrimes */ 511100217Smikeh if (pglob->gl_pathc == oldpathc) { 512100217Smikeh if (((pglob->gl_flags & GLOB_NOCHECK) || 513100217Smikeh ((pglob->gl_flags & GLOB_NOMAGIC) && 514100217Smikeh !(pglob->gl_flags & GLOB_MAGCHAR)))) 515100217Smikeh return(globextend(pattern, pglob, limit)); 516100217Smikeh else 517100217Smikeh return(GLOB_NOMATCH); 518100217Smikeh } 519100217Smikeh if (!(pglob->gl_flags & GLOB_NOSORT)) 5201573Srgrimes qsort(pglob->gl_pathv + pglob->gl_offs + oldpathc, 5211573Srgrimes pglob->gl_pathc - oldpathc, sizeof(char *), compare); 5221573Srgrimes return(0); 5231573Srgrimes} 5241573Srgrimes 5251573Srgrimesstatic int 526159294Sdelphijcompare(const void *p, const void *q) 5271573Srgrimes{ 5281573Srgrimes return(strcmp(*(char **)p, *(char **)q)); 5291573Srgrimes} 5301573Srgrimes 5311573Srgrimesstatic int 532159294Sdelphijglob1(Char *pattern, glob_t *pglob, size_t *limit) 5331573Srgrimes{ 53474963Speter Char pathbuf[MAXPATHLEN]; 5351573Srgrimes 5361573Srgrimes /* A null pathname is invalid -- POSIX 1003.1 sect. 2.4. */ 5371573Srgrimes if (*pattern == EOS) 5381573Srgrimes return(0); 53974963Speter return(glob2(pathbuf, pathbuf, pathbuf + MAXPATHLEN - 1, 54074963Speter pattern, pglob, limit)); 5411573Srgrimes} 5421573Srgrimes 5431573Srgrimes/* 5441573Srgrimes * The functions glob2 and glob3 are mutually recursive; there is one level 5451573Srgrimes * of recursion for each segment in the pattern that contains one or more 5461573Srgrimes * meta characters. 5471573Srgrimes */ 5481573Srgrimesstatic int 549159294Sdelphijglob2(Char *pathbuf, Char *pathend, Char *pathend_last, Char *pattern, 550159294Sdelphij glob_t *pglob, size_t *limit) 5511573Srgrimes{ 5521573Srgrimes struct stat sb; 5531573Srgrimes Char *p, *q; 5541573Srgrimes int anymeta; 5551573Srgrimes 5561573Srgrimes /* 5571573Srgrimes * Loop over pattern segments until end of pattern or until 5581573Srgrimes * segment with meta character found. 5591573Srgrimes */ 5601573Srgrimes for (anymeta = 0;;) { 5611573Srgrimes if (*pattern == EOS) { /* End of pattern? */ 5621573Srgrimes *pathend = EOS; 5631573Srgrimes if (g_lstat(pathbuf, &sb, pglob)) 5641573Srgrimes return(0); 5658870Srgrimes 5661573Srgrimes if (((pglob->gl_flags & GLOB_MARK) && 5671573Srgrimes pathend[-1] != SEP) && (S_ISDIR(sb.st_mode) 5681573Srgrimes || (S_ISLNK(sb.st_mode) && 5691573Srgrimes (g_stat(pathbuf, &sb, pglob) == 0) && 5701573Srgrimes S_ISDIR(sb.st_mode)))) { 57174963Speter if (pathend + 1 > pathend_last) 572100217Smikeh return (GLOB_ABORTED); 5731573Srgrimes *pathend++ = SEP; 5741573Srgrimes *pathend = EOS; 5751573Srgrimes } 5761573Srgrimes ++pglob->gl_matchc; 57774469Sjlemon return(globextend(pathbuf, pglob, limit)); 5781573Srgrimes } 5791573Srgrimes 5801573Srgrimes /* Find end of next segment, copy tentatively to pathend. */ 5811573Srgrimes q = pathend; 5821573Srgrimes p = pattern; 5831573Srgrimes while (*p != EOS && *p != SEP) { 5841573Srgrimes if (ismeta(*p)) 5851573Srgrimes anymeta = 1; 58674963Speter if (q + 1 > pathend_last) 587100217Smikeh return (GLOB_ABORTED); 5881573Srgrimes *q++ = *p++; 5891573Srgrimes } 5901573Srgrimes 5911573Srgrimes if (!anymeta) { /* No expansion, do next segment. */ 5921573Srgrimes pathend = q; 5931573Srgrimes pattern = p; 59474963Speter while (*pattern == SEP) { 59574963Speter if (pathend + 1 > pathend_last) 596100217Smikeh return (GLOB_ABORTED); 5971573Srgrimes *pathend++ = *pattern++; 59874963Speter } 5991573Srgrimes } else /* Need expansion, recurse. */ 60074963Speter return(glob3(pathbuf, pathend, pathend_last, pattern, p, 60174963Speter pglob, limit)); 6021573Srgrimes } 6031573Srgrimes /* NOTREACHED */ 6041573Srgrimes} 6051573Srgrimes 6061573Srgrimesstatic int 607159294Sdelphijglob3(Char *pathbuf, Char *pathend, Char *pathend_last, 608159294Sdelphij Char *pattern, Char *restpattern, 609159294Sdelphij glob_t *pglob, size_t *limit) 6101573Srgrimes{ 61190045Sobrien struct dirent *dp; 6121573Srgrimes DIR *dirp; 6131573Srgrimes int err; 6141573Srgrimes char buf[MAXPATHLEN]; 6151573Srgrimes 6161573Srgrimes /* 6171573Srgrimes * The readdirfunc declaration can't be prototyped, because it is 6181573Srgrimes * assigned, below, to two functions which are prototyped in glob.h 6191573Srgrimes * and dirent.h as taking pointers to differently typed opaque 6201573Srgrimes * structures. 6211573Srgrimes */ 6221573Srgrimes struct dirent *(*readdirfunc)(); 6231573Srgrimes 62474963Speter if (pathend > pathend_last) 625100217Smikeh return (GLOB_ABORTED); 6261573Srgrimes *pathend = EOS; 6271573Srgrimes errno = 0; 6288870Srgrimes 6291573Srgrimes if ((dirp = g_opendir(pathbuf, pglob)) == NULL) { 6301573Srgrimes /* TODO: don't call for ENOENT or ENOTDIR? */ 6311573Srgrimes if (pglob->gl_errfunc) { 63274921Speter if (g_Ctoc(pathbuf, buf, sizeof(buf))) 633100217Smikeh return (GLOB_ABORTED); 6341573Srgrimes if (pglob->gl_errfunc(buf, errno) || 6351573Srgrimes pglob->gl_flags & GLOB_ERR) 636100217Smikeh return (GLOB_ABORTED); 6371573Srgrimes } 6381573Srgrimes return(0); 6391573Srgrimes } 6401573Srgrimes 6411573Srgrimes err = 0; 6421573Srgrimes 6431573Srgrimes /* Search directory for matching names. */ 6441573Srgrimes if (pglob->gl_flags & GLOB_ALTDIRFUNC) 6451573Srgrimes readdirfunc = pglob->gl_readdir; 6461573Srgrimes else 6471573Srgrimes readdirfunc = readdir; 6481573Srgrimes while ((dp = (*readdirfunc)(dirp))) { 649159294Sdelphij char *sc; 65090045Sobrien Char *dc; 651132817Stjr wchar_t wc; 652132817Stjr size_t clen; 653132817Stjr mbstate_t mbs; 6541573Srgrimes 6551573Srgrimes /* Initial DOT must be matched literally. */ 6561573Srgrimes if (dp->d_name[0] == DOT && *pattern != DOT) 6571573Srgrimes continue; 658132817Stjr memset(&mbs, 0, sizeof(mbs)); 65974963Speter dc = pathend; 660159294Sdelphij sc = dp->d_name; 661132817Stjr while (dc < pathend_last) { 662132817Stjr clen = mbrtowc(&wc, sc, MB_LEN_MAX, &mbs); 663132817Stjr if (clen == (size_t)-1 || clen == (size_t)-2) { 664132817Stjr wc = *sc; 665132817Stjr clen = 1; 666132817Stjr memset(&mbs, 0, sizeof(mbs)); 667132817Stjr } 668132817Stjr if ((*dc++ = wc) == EOS) 669132817Stjr break; 670132817Stjr sc += clen; 671132817Stjr } 6721573Srgrimes if (!match(pathend, pattern, restpattern)) { 6731573Srgrimes *pathend = EOS; 6741573Srgrimes continue; 6751573Srgrimes } 67674963Speter err = glob2(pathbuf, --dc, pathend_last, restpattern, 67774963Speter pglob, limit); 6781573Srgrimes if (err) 6791573Srgrimes break; 6801573Srgrimes } 6811573Srgrimes 6821573Srgrimes if (pglob->gl_flags & GLOB_ALTDIRFUNC) 6831573Srgrimes (*pglob->gl_closedir)(dirp); 6841573Srgrimes else 6851573Srgrimes closedir(dirp); 6861573Srgrimes return(err); 6871573Srgrimes} 6881573Srgrimes 6891573Srgrimes 6901573Srgrimes/* 6911573Srgrimes * Extend the gl_pathv member of a glob_t structure to accomodate a new item, 6921573Srgrimes * add the new item, and update gl_pathc. 6931573Srgrimes * 6941573Srgrimes * This assumes the BSD realloc, which only copies the block when its size 6951573Srgrimes * crosses a power-of-two boundary; for v7 realloc, this would cause quadratic 6961573Srgrimes * behavior. 6971573Srgrimes * 6981573Srgrimes * Return 0 if new item added, error code if memory couldn't be allocated. 6991573Srgrimes * 7001573Srgrimes * Invariant of the glob_t structure: 7011573Srgrimes * Either gl_pathc is zero and gl_pathv is NULL; or gl_pathc > 0 and 7021573Srgrimes * gl_pathv points to (gl_offs + gl_pathc + 1) items. 7031573Srgrimes */ 7041573Srgrimesstatic int 705159294Sdelphijglobextend(const Char *path, glob_t *pglob, size_t *limit) 7061573Srgrimes{ 70790045Sobrien char **pathv; 708158812Sache size_t i, newsize, len; 7091573Srgrimes char *copy; 7101573Srgrimes const Char *p; 7111573Srgrimes 71280525Smikeh if (*limit && pglob->gl_pathc > *limit) { 71380525Smikeh errno = 0; 71480525Smikeh return (GLOB_NOSPACE); 71580525Smikeh } 71674307Sjlemon 7171573Srgrimes newsize = sizeof(*pathv) * (2 + pglob->gl_pathc + pglob->gl_offs); 7188870Srgrimes pathv = pglob->gl_pathv ? 7191573Srgrimes realloc((char *)pglob->gl_pathv, newsize) : 7201573Srgrimes malloc(newsize); 72174918Speter if (pathv == NULL) { 72274918Speter if (pglob->gl_pathv) { 72374918Speter free(pglob->gl_pathv); 72474918Speter pglob->gl_pathv = NULL; 72574918Speter } 7261573Srgrimes return(GLOB_NOSPACE); 72774918Speter } 7281573Srgrimes 7291573Srgrimes if (pglob->gl_pathv == NULL && pglob->gl_offs > 0) { 7301573Srgrimes /* first time around -- clear initial gl_offs items */ 7311573Srgrimes pathv += pglob->gl_offs; 732158812Sache for (i = pglob->gl_offs + 1; --i > 0; ) 7331573Srgrimes *--pathv = NULL; 7341573Srgrimes } 7351573Srgrimes pglob->gl_pathv = pathv; 7361573Srgrimes 7371573Srgrimes for (p = path; *p++;) 7381573Srgrimes continue; 739132817Stjr len = MB_CUR_MAX * (size_t)(p - path); /* XXX overallocation */ 74074921Speter if ((copy = malloc(len)) != NULL) { 74174921Speter if (g_Ctoc(path, copy, len)) { 74274918Speter free(copy); 74374918Speter return (GLOB_NOSPACE); 74474918Speter } 7451573Srgrimes pathv[pglob->gl_offs + pglob->gl_pathc++] = copy; 7461573Srgrimes } 7471573Srgrimes pathv[pglob->gl_offs + pglob->gl_pathc] = NULL; 7481573Srgrimes return(copy == NULL ? GLOB_NOSPACE : 0); 7491573Srgrimes} 7501573Srgrimes 7511573Srgrimes/* 7521573Srgrimes * pattern matching function for filenames. Each occurrence of the * 7531573Srgrimes * pattern causes a recursion level. 7541573Srgrimes */ 7551573Srgrimesstatic int 756159294Sdelphijmatch(Char *name, Char *pat, Char *patend) 7571573Srgrimes{ 7581573Srgrimes int ok, negate_range; 7591573Srgrimes Char c, k; 760227753Stheraven struct xlocale_collate *table = 761227753Stheraven (struct xlocale_collate*)__get_locale()->components[XLC_COLLATE]; 7621573Srgrimes 7631573Srgrimes while (pat < patend) { 7641573Srgrimes c = *pat++; 7651573Srgrimes switch (c & M_MASK) { 7661573Srgrimes case M_ALL: 7671573Srgrimes if (pat == patend) 7681573Srgrimes return(1); 7698870Srgrimes do 7701573Srgrimes if (match(name, pat, patend)) 7711573Srgrimes return(1); 7721573Srgrimes while (*name++ != EOS); 7731573Srgrimes return(0); 7741573Srgrimes case M_ONE: 7751573Srgrimes if (*name++ == EOS) 7761573Srgrimes return(0); 7771573Srgrimes break; 7781573Srgrimes case M_SET: 7791573Srgrimes ok = 0; 7801573Srgrimes if ((k = *name++) == EOS) 7811573Srgrimes return(0); 7821573Srgrimes if ((negate_range = ((*pat & M_MASK) == M_NOT)) != EOS) 7831573Srgrimes ++pat; 7841573Srgrimes while (((c = *pat++) & M_MASK) != M_END) 7851573Srgrimes if ((*pat & M_MASK) == M_RNG) { 786227753Stheraven if (table->__collate_load_error ? 78724633Sache CHAR(c) <= CHAR(k) && CHAR(k) <= CHAR(pat[1]) : 788227753Stheraven __collate_range_cmp(table, CHAR(c), CHAR(k)) <= 0 789227753Stheraven && __collate_range_cmp(table, CHAR(k), CHAR(pat[1])) <= 0 79017528Sache ) 7911573Srgrimes ok = 1; 7921573Srgrimes pat += 2; 7931573Srgrimes } else if (c == k) 7941573Srgrimes ok = 1; 7951573Srgrimes if (ok == negate_range) 7961573Srgrimes return(0); 7971573Srgrimes break; 7981573Srgrimes default: 7991573Srgrimes if (*name++ != c) 8001573Srgrimes return(0); 8011573Srgrimes break; 8021573Srgrimes } 8031573Srgrimes } 8041573Srgrimes return(*name == EOS); 8051573Srgrimes} 8061573Srgrimes 8071573Srgrimes/* Free allocated data belonging to a glob_t structure. */ 8081573Srgrimesvoid 809159294Sdelphijglobfree(glob_t *pglob) 8101573Srgrimes{ 811158812Sache size_t i; 81290045Sobrien char **pp; 8131573Srgrimes 8141573Srgrimes if (pglob->gl_pathv != NULL) { 8151573Srgrimes pp = pglob->gl_pathv + pglob->gl_offs; 8161573Srgrimes for (i = pglob->gl_pathc; i--; ++pp) 8171573Srgrimes if (*pp) 8181573Srgrimes free(*pp); 8191573Srgrimes free(pglob->gl_pathv); 82074918Speter pglob->gl_pathv = NULL; 8211573Srgrimes } 8221573Srgrimes} 8231573Srgrimes 8241573Srgrimesstatic DIR * 825159294Sdelphijg_opendir(Char *str, glob_t *pglob) 8261573Srgrimes{ 8271573Srgrimes char buf[MAXPATHLEN]; 8281573Srgrimes 8291573Srgrimes if (!*str) 8301573Srgrimes strcpy(buf, "."); 83174918Speter else { 83274921Speter if (g_Ctoc(str, buf, sizeof(buf))) 83374918Speter return (NULL); 83474918Speter } 8351573Srgrimes 8361573Srgrimes if (pglob->gl_flags & GLOB_ALTDIRFUNC) 8371573Srgrimes return((*pglob->gl_opendir)(buf)); 8381573Srgrimes 8391573Srgrimes return(opendir(buf)); 8401573Srgrimes} 8411573Srgrimes 8421573Srgrimesstatic int 843159294Sdelphijg_lstat(Char *fn, struct stat *sb, glob_t *pglob) 8441573Srgrimes{ 8451573Srgrimes char buf[MAXPATHLEN]; 8461573Srgrimes 84774921Speter if (g_Ctoc(fn, buf, sizeof(buf))) { 84874918Speter errno = ENAMETOOLONG; 84974918Speter return (-1); 85074918Speter } 8511573Srgrimes if (pglob->gl_flags & GLOB_ALTDIRFUNC) 8521573Srgrimes return((*pglob->gl_lstat)(buf, sb)); 8531573Srgrimes return(lstat(buf, sb)); 8541573Srgrimes} 8551573Srgrimes 8561573Srgrimesstatic int 857159294Sdelphijg_stat(Char *fn, struct stat *sb, glob_t *pglob) 8581573Srgrimes{ 8591573Srgrimes char buf[MAXPATHLEN]; 8601573Srgrimes 86174921Speter if (g_Ctoc(fn, buf, sizeof(buf))) { 86274918Speter errno = ENAMETOOLONG; 86374918Speter return (-1); 86474918Speter } 8651573Srgrimes if (pglob->gl_flags & GLOB_ALTDIRFUNC) 8661573Srgrimes return((*pglob->gl_stat)(buf, sb)); 8671573Srgrimes return(stat(buf, sb)); 8681573Srgrimes} 8691573Srgrimes 870180021Smtmstatic const Char * 871180021Smtmg_strchr(const Char *str, wchar_t ch) 8721573Srgrimes{ 873159294Sdelphij 8741573Srgrimes do { 8751573Srgrimes if (*str == ch) 8761573Srgrimes return (str); 8771573Srgrimes } while (*str++); 8781573Srgrimes return (NULL); 8791573Srgrimes} 8801573Srgrimes 88174918Speterstatic int 882159294Sdelphijg_Ctoc(const Char *str, char *buf, size_t len) 8831573Srgrimes{ 884132817Stjr mbstate_t mbs; 885132817Stjr size_t clen; 8861573Srgrimes 887132817Stjr memset(&mbs, 0, sizeof(mbs)); 888132817Stjr while (len >= MB_CUR_MAX) { 889132817Stjr clen = wcrtomb(buf, *str, &mbs); 890132817Stjr if (clen == (size_t)-1) 891132817Stjr return (1); 892132817Stjr if (*str == L'\0') 89374921Speter return (0); 894132817Stjr str++; 895132817Stjr buf += clen; 896132817Stjr len -= clen; 89774921Speter } 89874921Speter return (1); 8991573Srgrimes} 9001573Srgrimes 9011573Srgrimes#ifdef DEBUG 9028870Srgrimesstatic void 903159294Sdelphijqprintf(const char *str, Char *s) 9041573Srgrimes{ 90590045Sobrien Char *p; 9061573Srgrimes 9071573Srgrimes (void)printf("%s:\n", str); 9081573Srgrimes for (p = s; *p; p++) 9091573Srgrimes (void)printf("%c", CHAR(*p)); 9101573Srgrimes (void)printf("\n"); 9111573Srgrimes for (p = s; *p; p++) 9121573Srgrimes (void)printf("%c", *p & M_PROTECT ? '"' : ' '); 9131573Srgrimes (void)printf("\n"); 9141573Srgrimes for (p = s; *p; p++) 9151573Srgrimes (void)printf("%c", ismeta(*p) ? '_' : ' '); 9161573Srgrimes (void)printf("\n"); 9171573Srgrimes} 9181573Srgrimes#endif 919