glob.c revision 74921
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 * 81573Srgrimes * Redistribution and use in source and binary forms, with or without 91573Srgrimes * modification, are permitted provided that the following conditions 101573Srgrimes * are met: 111573Srgrimes * 1. Redistributions of source code must retain the above copyright 121573Srgrimes * notice, this list of conditions and the following disclaimer. 131573Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 141573Srgrimes * notice, this list of conditions and the following disclaimer in the 151573Srgrimes * documentation and/or other materials provided with the distribution. 161573Srgrimes * 3. All advertising materials mentioning features or use of this software 171573Srgrimes * must display the following acknowledgement: 181573Srgrimes * This product includes software developed by the University of 191573Srgrimes * California, Berkeley and its contributors. 201573Srgrimes * 4. Neither the name of the University nor the names of its contributors 211573Srgrimes * may be used to endorse or promote products derived from this software 221573Srgrimes * without specific prior written permission. 231573Srgrimes * 241573Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 251573Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 261573Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 271573Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 281573Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 291573Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 301573Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 311573Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 321573Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 331573Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 341573Srgrimes * SUCH DAMAGE. 3574307Sjlemon * 3674307Sjlemon * $FreeBSD: head/lib/libc/gen/glob.c 74921 2001-03-28 10:56:11Z peter $ 371573Srgrimes */ 381573Srgrimes 391573Srgrimes#if defined(LIBC_SCCS) && !defined(lint) 401573Srgrimesstatic char sccsid[] = "@(#)glob.c 8.3 (Berkeley) 10/13/93"; 411573Srgrimes#endif /* LIBC_SCCS and not lint */ 421573Srgrimes 431573Srgrimes/* 441573Srgrimes * glob(3) -- a superset of the one defined in POSIX 1003.2. 451573Srgrimes * 461573Srgrimes * The [!...] convention to negate a range is supported (SysV, Posix, ksh). 471573Srgrimes * 481573Srgrimes * Optional extra services, controlled by flags not defined by POSIX: 491573Srgrimes * 501573Srgrimes * GLOB_QUOTE: 511573Srgrimes * Escaping convention: \ inhibits any special meaning the following 521573Srgrimes * character might have (except \ at end of string is retained). 531573Srgrimes * GLOB_MAGCHAR: 541573Srgrimes * Set in gl_flags if pattern contained a globbing character. 551573Srgrimes * GLOB_NOMAGIC: 561573Srgrimes * Same as GLOB_NOCHECK, but it will only append pattern if it did 571573Srgrimes * not contain any magic characters. [Used in csh style globbing] 581573Srgrimes * GLOB_ALTDIRFUNC: 591573Srgrimes * Use alternately specified directory access functions. 601573Srgrimes * GLOB_TILDE: 611573Srgrimes * expand ~user/foo to the /home/dir/of/user/foo 621573Srgrimes * GLOB_BRACE: 638870Srgrimes * expand {1,2}{a,b} to 1a 1b 2a 2b 641573Srgrimes * gl_matchc: 651573Srgrimes * Number of matches in the current invocation of glob. 661573Srgrimes */ 671573Srgrimes 681573Srgrimes#include <sys/param.h> 691573Srgrimes#include <sys/stat.h> 701573Srgrimes 711573Srgrimes#include <ctype.h> 721573Srgrimes#include <dirent.h> 731573Srgrimes#include <errno.h> 741573Srgrimes#include <glob.h> 751573Srgrimes#include <pwd.h> 761573Srgrimes#include <stdio.h> 771573Srgrimes#include <stdlib.h> 781573Srgrimes#include <string.h> 791573Srgrimes#include <unistd.h> 801573Srgrimes 8119276Sache#include "collate.h" 8219276Sache 831573Srgrimes#define DOLLAR '$' 841573Srgrimes#define DOT '.' 851573Srgrimes#define EOS '\0' 861573Srgrimes#define LBRACKET '[' 871573Srgrimes#define NOT '!' 881573Srgrimes#define QUESTION '?' 891573Srgrimes#define QUOTE '\\' 901573Srgrimes#define RANGE '-' 911573Srgrimes#define RBRACKET ']' 921573Srgrimes#define SEP '/' 931573Srgrimes#define STAR '*' 941573Srgrimes#define TILDE '~' 951573Srgrimes#define UNDERSCORE '_' 961573Srgrimes#define LBRACE '{' 971573Srgrimes#define RBRACE '}' 981573Srgrimes#define SLASH '/' 991573Srgrimes#define COMMA ',' 1001573Srgrimes 1011573Srgrimes#ifndef DEBUG 1021573Srgrimes 1031573Srgrimes#define M_QUOTE 0x8000 1041573Srgrimes#define M_PROTECT 0x4000 1051573Srgrimes#define M_MASK 0xffff 1061573Srgrimes#define M_ASCII 0x00ff 1071573Srgrimes 1081573Srgrimestypedef u_short Char; 1091573Srgrimes 1101573Srgrimes#else 1111573Srgrimes 1121573Srgrimes#define M_QUOTE 0x80 1131573Srgrimes#define M_PROTECT 0x40 1141573Srgrimes#define M_MASK 0xff 1151573Srgrimes#define M_ASCII 0x7f 1161573Srgrimes 1171573Srgrimestypedef char Char; 1181573Srgrimes 1191573Srgrimes#endif 1201573Srgrimes 1211573Srgrimes 1221573Srgrimes#define CHAR(c) ((Char)((c)&M_ASCII)) 1231573Srgrimes#define META(c) ((Char)((c)|M_QUOTE)) 1241573Srgrimes#define M_ALL META('*') 1251573Srgrimes#define M_END META(']') 1261573Srgrimes#define M_NOT META('!') 1271573Srgrimes#define M_ONE META('?') 1281573Srgrimes#define M_RNG META('-') 1291573Srgrimes#define M_SET META('[') 1301573Srgrimes#define ismeta(c) (((c)&M_QUOTE) != 0) 1311573Srgrimes 1321573Srgrimes 1331573Srgrimesstatic int compare __P((const void *, const void *)); 13474921Speterstatic int g_Ctoc __P((const Char *, char *, u_int)); 1351573Srgrimesstatic int g_lstat __P((Char *, struct stat *, glob_t *)); 1361573Srgrimesstatic DIR *g_opendir __P((Char *, glob_t *)); 1371573Srgrimesstatic Char *g_strchr __P((Char *, int)); 1381573Srgrimes#ifdef notdef 1391573Srgrimesstatic Char *g_strcat __P((Char *, const Char *)); 1401573Srgrimes#endif 1411573Srgrimesstatic int g_stat __P((Char *, struct stat *, glob_t *)); 14274469Sjlemonstatic int glob0 __P((const Char *, glob_t *, int *)); 14374469Sjlemonstatic int glob1 __P((Char *, glob_t *, int *)); 14474469Sjlemonstatic int glob2 __P((Char *, Char *, Char *, glob_t *, int *)); 14574469Sjlemonstatic int glob3 __P((Char *, Char *, Char *, Char *, glob_t *, int *)); 14674469Sjlemonstatic int globextend __P((const Char *, glob_t *, int *)); 14724158Simpstatic const Char * globtilde __P((const Char *, Char *, size_t, glob_t *)); 14874469Sjlemonstatic int globexp1 __P((const Char *, glob_t *, int *)); 14974469Sjlemonstatic int globexp2 __P((const Char *, const Char *, glob_t *, int *, int *)); 1501573Srgrimesstatic int match __P((Char *, Char *, Char *)); 1511573Srgrimes#ifdef DEBUG 1521573Srgrimesstatic void qprintf __P((const char *, Char *)); 1531573Srgrimes#endif 1541573Srgrimes 1551573Srgrimesint 1561573Srgrimesglob(pattern, flags, errfunc, pglob) 1571573Srgrimes const char *pattern; 1581573Srgrimes int flags, (*errfunc) __P((const char *, int)); 1591573Srgrimes glob_t *pglob; 1601573Srgrimes{ 1611573Srgrimes const u_char *patnext; 16274469Sjlemon int c, limit; 1631573Srgrimes Char *bufnext, *bufend, patbuf[MAXPATHLEN+1]; 1641573Srgrimes 1651573Srgrimes patnext = (u_char *) pattern; 1661573Srgrimes if (!(flags & GLOB_APPEND)) { 1671573Srgrimes pglob->gl_pathc = 0; 1681573Srgrimes pglob->gl_pathv = NULL; 1691573Srgrimes if (!(flags & GLOB_DOOFFS)) 1701573Srgrimes pglob->gl_offs = 0; 1711573Srgrimes } 17274469Sjlemon if (flags & GLOB_MAXPATH) 17374469Sjlemon limit = pglob->gl_matchc; 17474469Sjlemon else 17574469Sjlemon limit = 0; 1761573Srgrimes pglob->gl_flags = flags & ~GLOB_MAGCHAR; 1771573Srgrimes pglob->gl_errfunc = errfunc; 1781573Srgrimes pglob->gl_matchc = 0; 1791573Srgrimes 1801573Srgrimes bufnext = patbuf; 1811573Srgrimes bufend = bufnext + MAXPATHLEN; 1821573Srgrimes if (flags & GLOB_QUOTE) { 1831573Srgrimes /* Protect the quoted characters. */ 1848870Srgrimes while (bufnext < bufend && (c = *patnext++) != EOS) 1851573Srgrimes if (c == QUOTE) { 1861573Srgrimes if ((c = *patnext++) == EOS) { 1871573Srgrimes c = QUOTE; 1881573Srgrimes --patnext; 1891573Srgrimes } 1901573Srgrimes *bufnext++ = c | M_PROTECT; 1911573Srgrimes } 1921573Srgrimes else 1931573Srgrimes *bufnext++ = c; 1941573Srgrimes } 1958870Srgrimes else 1968870Srgrimes while (bufnext < bufend && (c = *patnext++) != EOS) 1971573Srgrimes *bufnext++ = c; 1981573Srgrimes *bufnext = EOS; 1991573Srgrimes 2001573Srgrimes if (flags & GLOB_BRACE) 20174469Sjlemon return globexp1(patbuf, pglob, &limit); 2021573Srgrimes else 20374469Sjlemon return glob0(patbuf, pglob, &limit); 2041573Srgrimes} 2051573Srgrimes 2061573Srgrimes/* 2071573Srgrimes * Expand recursively a glob {} pattern. When there is no more expansion 2081573Srgrimes * invoke the standard globbing routine to glob the rest of the magic 2091573Srgrimes * characters 2101573Srgrimes */ 21174469Sjlemonstatic int globexp1(pattern, pglob, limit) 2121573Srgrimes const Char *pattern; 2131573Srgrimes glob_t *pglob; 21474469Sjlemon int *limit; 2151573Srgrimes{ 2161573Srgrimes const Char* ptr = pattern; 2171573Srgrimes int rv; 2181573Srgrimes 2191573Srgrimes /* Protect a single {}, for find(1), like csh */ 2201573Srgrimes if (pattern[0] == LBRACE && pattern[1] == RBRACE && pattern[2] == EOS) 22174469Sjlemon return glob0(pattern, pglob, limit); 2221573Srgrimes 2231573Srgrimes while ((ptr = (const Char *) g_strchr((Char *) ptr, LBRACE)) != NULL) 22474469Sjlemon if (!globexp2(ptr, pattern, pglob, &rv, limit)) 2251573Srgrimes return rv; 2261573Srgrimes 22774469Sjlemon return glob0(pattern, pglob, limit); 2281573Srgrimes} 2291573Srgrimes 2301573Srgrimes 2311573Srgrimes/* 2321573Srgrimes * Recursive brace globbing helper. Tries to expand a single brace. 2331573Srgrimes * If it succeeds then it invokes globexp1 with the new pattern. 2341573Srgrimes * If it fails then it tries to glob the rest of the pattern and returns. 2351573Srgrimes */ 23674469Sjlemonstatic int globexp2(ptr, pattern, pglob, rv, limit) 2371573Srgrimes const Char *ptr, *pattern; 2381573Srgrimes glob_t *pglob; 23974469Sjlemon int *rv, *limit; 2401573Srgrimes{ 2411573Srgrimes int i; 2421573Srgrimes Char *lm, *ls; 2431573Srgrimes const Char *pe, *pm, *pl; 2441573Srgrimes Char patbuf[MAXPATHLEN + 1]; 2451573Srgrimes 2461573Srgrimes /* copy part up to the brace */ 2471573Srgrimes for (lm = patbuf, pm = pattern; pm != ptr; *lm++ = *pm++) 2481573Srgrimes continue; 2491573Srgrimes ls = lm; 2501573Srgrimes 2511573Srgrimes /* Find the balanced brace */ 2521573Srgrimes for (i = 0, pe = ++ptr; *pe; pe++) 2531573Srgrimes if (*pe == LBRACKET) { 2541573Srgrimes /* Ignore everything between [] */ 2551573Srgrimes for (pm = pe++; *pe != RBRACKET && *pe != EOS; pe++) 2561573Srgrimes continue; 2571573Srgrimes if (*pe == EOS) { 2588870Srgrimes /* 2591573Srgrimes * We could not find a matching RBRACKET. 2601573Srgrimes * Ignore and just look for RBRACE 2611573Srgrimes */ 2621573Srgrimes pe = pm; 2631573Srgrimes } 2641573Srgrimes } 2651573Srgrimes else if (*pe == LBRACE) 2661573Srgrimes i++; 2671573Srgrimes else if (*pe == RBRACE) { 2681573Srgrimes if (i == 0) 2691573Srgrimes break; 2701573Srgrimes i--; 2711573Srgrimes } 2721573Srgrimes 2731573Srgrimes /* Non matching braces; just glob the pattern */ 2741573Srgrimes if (i != 0 || *pe == EOS) { 27574469Sjlemon *rv = glob0(patbuf, pglob, limit); 2761573Srgrimes return 0; 2771573Srgrimes } 2781573Srgrimes 2791573Srgrimes for (i = 0, pl = pm = ptr; pm <= pe; pm++) 2801573Srgrimes switch (*pm) { 2811573Srgrimes case LBRACKET: 2821573Srgrimes /* Ignore everything between [] */ 2831573Srgrimes for (pl = pm++; *pm != RBRACKET && *pm != EOS; pm++) 2841573Srgrimes continue; 2851573Srgrimes if (*pm == EOS) { 2868870Srgrimes /* 2871573Srgrimes * We could not find a matching RBRACKET. 2881573Srgrimes * Ignore and just look for RBRACE 2891573Srgrimes */ 2901573Srgrimes pm = pl; 2911573Srgrimes } 2921573Srgrimes break; 2931573Srgrimes 2941573Srgrimes case LBRACE: 2951573Srgrimes i++; 2961573Srgrimes break; 2971573Srgrimes 2981573Srgrimes case RBRACE: 2991573Srgrimes if (i) { 3001573Srgrimes i--; 3011573Srgrimes break; 3021573Srgrimes } 3031573Srgrimes /* FALLTHROUGH */ 3041573Srgrimes case COMMA: 3051573Srgrimes if (i && *pm == COMMA) 3061573Srgrimes break; 3071573Srgrimes else { 3081573Srgrimes /* Append the current string */ 3091573Srgrimes for (lm = ls; (pl < pm); *lm++ = *pl++) 3101573Srgrimes continue; 3118870Srgrimes /* 3121573Srgrimes * Append the rest of the pattern after the 3131573Srgrimes * closing brace 3141573Srgrimes */ 3151573Srgrimes for (pl = pe + 1; (*lm++ = *pl++) != EOS;) 3161573Srgrimes continue; 3171573Srgrimes 3181573Srgrimes /* Expand the current pattern */ 3191573Srgrimes#ifdef DEBUG 3201573Srgrimes qprintf("globexp2:", patbuf); 3211573Srgrimes#endif 32274469Sjlemon *rv = globexp1(patbuf, pglob, limit); 3231573Srgrimes 3241573Srgrimes /* move after the comma, to the next string */ 3251573Srgrimes pl = pm + 1; 3261573Srgrimes } 3271573Srgrimes break; 3281573Srgrimes 3291573Srgrimes default: 3301573Srgrimes break; 3311573Srgrimes } 3321573Srgrimes *rv = 0; 3331573Srgrimes return 0; 3341573Srgrimes} 3351573Srgrimes 3361573Srgrimes 3371573Srgrimes 3381573Srgrimes/* 3391573Srgrimes * expand tilde from the passwd file. 3401573Srgrimes */ 3411573Srgrimesstatic const Char * 34224158Simpglobtilde(pattern, patbuf, patbuf_len, pglob) 3431573Srgrimes const Char *pattern; 3441573Srgrimes Char *patbuf; 34524158Simp size_t patbuf_len; 3461573Srgrimes glob_t *pglob; 3471573Srgrimes{ 3481573Srgrimes struct passwd *pwd; 3491573Srgrimes char *h; 3501573Srgrimes const Char *p; 35124158Simp Char *b, *eb; 3521573Srgrimes 3531573Srgrimes if (*pattern != TILDE || !(pglob->gl_flags & GLOB_TILDE)) 3541573Srgrimes return pattern; 3551573Srgrimes 35624158Simp /* 35724158Simp * Copy up to the end of the string or / 35824158Simp */ 35924158Simp eb = &patbuf[patbuf_len - 1]; 36024158Simp for (p = pattern + 1, h = (char *) patbuf; 36124158Simp h < (char *)eb && *p && *p != SLASH; *h++ = *p++) 3621573Srgrimes continue; 3631573Srgrimes 3641573Srgrimes *h = EOS; 3651573Srgrimes 3661573Srgrimes if (((char *) patbuf)[0] == EOS) { 3678870Srgrimes /* 36828820Simp * handle a plain ~ or ~/ by expanding $HOME first (iff 36928820Simp * we're not running setuid or setgid) and then trying 37028820Simp * the password file 3711573Srgrimes */ 37233664Sjb if ( 37333664Sjb#ifndef __NETBSD_SYSCALLS 37433664Sjb issetugid() != 0 || 37533664Sjb#endif 37633664Sjb (h = getenv("HOME")) == NULL) { 37728836Sache if (((h = getlogin()) != NULL && 37828836Sache (pwd = getpwnam(h)) != NULL) || 37928836Sache (pwd = getpwuid(getuid())) != NULL) 38028836Sache h = pwd->pw_dir; 38128836Sache else 3821573Srgrimes return pattern; 3831573Srgrimes } 3841573Srgrimes } 3851573Srgrimes else { 3861573Srgrimes /* 3871573Srgrimes * Expand a ~user 3881573Srgrimes */ 3891573Srgrimes if ((pwd = getpwnam((char*) patbuf)) == NULL) 3901573Srgrimes return pattern; 3911573Srgrimes else 3921573Srgrimes h = pwd->pw_dir; 3931573Srgrimes } 3941573Srgrimes 3951573Srgrimes /* Copy the home directory */ 39624158Simp for (b = patbuf; b < eb && *h; *b++ = *h++) 3971573Srgrimes continue; 3988870Srgrimes 3991573Srgrimes /* Append the rest of the pattern */ 40024158Simp while (b < eb && (*b++ = *p++) != EOS) 4011573Srgrimes continue; 40224158Simp *b = EOS; 4031573Srgrimes 4041573Srgrimes return patbuf; 4051573Srgrimes} 4061573Srgrimes 4078870Srgrimes 4081573Srgrimes/* 4091573Srgrimes * The main glob() routine: compiles the pattern (optionally processing 4101573Srgrimes * quotes), calls glob1() to do the real pattern matching, and finally 4111573Srgrimes * sorts the list (unless unsorted operation is requested). Returns 0 4121573Srgrimes * if things went well, nonzero if errors occurred. It is not an error 4131573Srgrimes * to find no matches. 4141573Srgrimes */ 4151573Srgrimesstatic int 41674469Sjlemonglob0(pattern, pglob, limit) 4171573Srgrimes const Char *pattern; 4181573Srgrimes glob_t *pglob; 41974469Sjlemon int *limit; 4201573Srgrimes{ 4211573Srgrimes const Char *qpatnext; 4221573Srgrimes int c, err, oldpathc; 4231573Srgrimes Char *bufnext, patbuf[MAXPATHLEN+1]; 4241573Srgrimes 42524158Simp qpatnext = globtilde(pattern, patbuf, sizeof(patbuf) / sizeof(Char), 42624158Simp pglob); 4271573Srgrimes oldpathc = pglob->gl_pathc; 4281573Srgrimes bufnext = patbuf; 4291573Srgrimes 4301573Srgrimes /* We don't need to check for buffer overflow any more. */ 4311573Srgrimes while ((c = *qpatnext++) != EOS) { 4321573Srgrimes switch (c) { 4331573Srgrimes case LBRACKET: 4341573Srgrimes c = *qpatnext; 4351573Srgrimes if (c == NOT) 4361573Srgrimes ++qpatnext; 4371573Srgrimes if (*qpatnext == EOS || 4381573Srgrimes g_strchr((Char *) qpatnext+1, RBRACKET) == NULL) { 4391573Srgrimes *bufnext++ = LBRACKET; 4401573Srgrimes if (c == NOT) 4411573Srgrimes --qpatnext; 4421573Srgrimes break; 4431573Srgrimes } 4441573Srgrimes *bufnext++ = M_SET; 4451573Srgrimes if (c == NOT) 4461573Srgrimes *bufnext++ = M_NOT; 4471573Srgrimes c = *qpatnext++; 4481573Srgrimes do { 4491573Srgrimes *bufnext++ = CHAR(c); 4501573Srgrimes if (*qpatnext == RANGE && 4511573Srgrimes (c = qpatnext[1]) != RBRACKET) { 4521573Srgrimes *bufnext++ = M_RNG; 4531573Srgrimes *bufnext++ = CHAR(c); 4541573Srgrimes qpatnext += 2; 4551573Srgrimes } 4561573Srgrimes } while ((c = *qpatnext++) != RBRACKET); 4571573Srgrimes pglob->gl_flags |= GLOB_MAGCHAR; 4581573Srgrimes *bufnext++ = M_END; 4591573Srgrimes break; 4601573Srgrimes case QUESTION: 4611573Srgrimes pglob->gl_flags |= GLOB_MAGCHAR; 4621573Srgrimes *bufnext++ = M_ONE; 4631573Srgrimes break; 4641573Srgrimes case STAR: 4651573Srgrimes pglob->gl_flags |= GLOB_MAGCHAR; 4668870Srgrimes /* collapse adjacent stars to one, 4671573Srgrimes * to avoid exponential behavior 4681573Srgrimes */ 4691573Srgrimes if (bufnext == patbuf || bufnext[-1] != M_ALL) 4701573Srgrimes *bufnext++ = M_ALL; 4711573Srgrimes break; 4721573Srgrimes default: 4731573Srgrimes *bufnext++ = CHAR(c); 4741573Srgrimes break; 4751573Srgrimes } 4761573Srgrimes } 4771573Srgrimes *bufnext = EOS; 4781573Srgrimes#ifdef DEBUG 4791573Srgrimes qprintf("glob0:", patbuf); 4801573Srgrimes#endif 4811573Srgrimes 48274469Sjlemon if ((err = glob1(patbuf, pglob, limit)) != 0) 4831573Srgrimes return(err); 4841573Srgrimes 4851573Srgrimes /* 4868870Srgrimes * If there was no match we are going to append the pattern 4871573Srgrimes * if GLOB_NOCHECK was specified or if GLOB_NOMAGIC was specified 4881573Srgrimes * and the pattern did not contain any magic characters 4891573Srgrimes * GLOB_NOMAGIC is there just for compatibility with csh. 4901573Srgrimes */ 4918870Srgrimes if (pglob->gl_pathc == oldpathc && 4928870Srgrimes ((pglob->gl_flags & GLOB_NOCHECK) || 4931573Srgrimes ((pglob->gl_flags & GLOB_NOMAGIC) && 4941573Srgrimes !(pglob->gl_flags & GLOB_MAGCHAR)))) 49574469Sjlemon return(globextend(pattern, pglob, limit)); 4968870Srgrimes else if (!(pglob->gl_flags & GLOB_NOSORT)) 4971573Srgrimes qsort(pglob->gl_pathv + pglob->gl_offs + oldpathc, 4981573Srgrimes pglob->gl_pathc - oldpathc, sizeof(char *), compare); 4991573Srgrimes return(0); 5001573Srgrimes} 5011573Srgrimes 5021573Srgrimesstatic int 5031573Srgrimescompare(p, q) 5041573Srgrimes const void *p, *q; 5051573Srgrimes{ 5061573Srgrimes return(strcmp(*(char **)p, *(char **)q)); 5071573Srgrimes} 5081573Srgrimes 5091573Srgrimesstatic int 51074469Sjlemonglob1(pattern, pglob, limit) 5111573Srgrimes Char *pattern; 5121573Srgrimes glob_t *pglob; 51374469Sjlemon int *limit; 5141573Srgrimes{ 5151573Srgrimes Char pathbuf[MAXPATHLEN+1]; 5161573Srgrimes 5171573Srgrimes /* A null pathname is invalid -- POSIX 1003.1 sect. 2.4. */ 5181573Srgrimes if (*pattern == EOS) 5191573Srgrimes return(0); 52074469Sjlemon return(glob2(pathbuf, pathbuf, pattern, pglob, limit)); 5211573Srgrimes} 5221573Srgrimes 5231573Srgrimes/* 5241573Srgrimes * The functions glob2 and glob3 are mutually recursive; there is one level 5251573Srgrimes * of recursion for each segment in the pattern that contains one or more 5261573Srgrimes * meta characters. 5271573Srgrimes */ 5281573Srgrimesstatic int 52974469Sjlemonglob2(pathbuf, pathend, pattern, pglob, limit) 5301573Srgrimes Char *pathbuf, *pathend, *pattern; 5311573Srgrimes glob_t *pglob; 53274469Sjlemon int *limit; 5331573Srgrimes{ 5341573Srgrimes struct stat sb; 5351573Srgrimes Char *p, *q; 5361573Srgrimes int anymeta; 5371573Srgrimes 5381573Srgrimes /* 5391573Srgrimes * Loop over pattern segments until end of pattern or until 5401573Srgrimes * segment with meta character found. 5411573Srgrimes */ 5421573Srgrimes for (anymeta = 0;;) { 5431573Srgrimes if (*pattern == EOS) { /* End of pattern? */ 5441573Srgrimes *pathend = EOS; 5451573Srgrimes if (g_lstat(pathbuf, &sb, pglob)) 5461573Srgrimes return(0); 5478870Srgrimes 5481573Srgrimes if (((pglob->gl_flags & GLOB_MARK) && 5491573Srgrimes pathend[-1] != SEP) && (S_ISDIR(sb.st_mode) 5501573Srgrimes || (S_ISLNK(sb.st_mode) && 5511573Srgrimes (g_stat(pathbuf, &sb, pglob) == 0) && 5521573Srgrimes S_ISDIR(sb.st_mode)))) { 5531573Srgrimes *pathend++ = SEP; 5541573Srgrimes *pathend = EOS; 5551573Srgrimes } 5561573Srgrimes ++pglob->gl_matchc; 55774469Sjlemon return(globextend(pathbuf, pglob, limit)); 5581573Srgrimes } 5591573Srgrimes 5601573Srgrimes /* Find end of next segment, copy tentatively to pathend. */ 5611573Srgrimes q = pathend; 5621573Srgrimes p = pattern; 5631573Srgrimes while (*p != EOS && *p != SEP) { 5641573Srgrimes if (ismeta(*p)) 5651573Srgrimes anymeta = 1; 5661573Srgrimes *q++ = *p++; 5671573Srgrimes } 5681573Srgrimes 5691573Srgrimes if (!anymeta) { /* No expansion, do next segment. */ 5701573Srgrimes pathend = q; 5711573Srgrimes pattern = p; 5721573Srgrimes while (*pattern == SEP) 5731573Srgrimes *pathend++ = *pattern++; 5741573Srgrimes } else /* Need expansion, recurse. */ 57574469Sjlemon return(glob3(pathbuf, pathend, pattern, p, pglob, 57674469Sjlemon limit)); 5771573Srgrimes } 5781573Srgrimes /* NOTREACHED */ 5791573Srgrimes} 5801573Srgrimes 5811573Srgrimesstatic int 58274469Sjlemonglob3(pathbuf, pathend, pattern, restpattern, pglob, limit) 5831573Srgrimes Char *pathbuf, *pathend, *pattern, *restpattern; 5841573Srgrimes glob_t *pglob; 58574469Sjlemon int *limit; 5861573Srgrimes{ 5871573Srgrimes register struct dirent *dp; 5881573Srgrimes DIR *dirp; 5891573Srgrimes int err; 5901573Srgrimes char buf[MAXPATHLEN]; 5911573Srgrimes 5921573Srgrimes /* 5931573Srgrimes * The readdirfunc declaration can't be prototyped, because it is 5941573Srgrimes * assigned, below, to two functions which are prototyped in glob.h 5951573Srgrimes * and dirent.h as taking pointers to differently typed opaque 5961573Srgrimes * structures. 5971573Srgrimes */ 5981573Srgrimes struct dirent *(*readdirfunc)(); 5991573Srgrimes 6001573Srgrimes *pathend = EOS; 6011573Srgrimes errno = 0; 6028870Srgrimes 6031573Srgrimes if ((dirp = g_opendir(pathbuf, pglob)) == NULL) { 6041573Srgrimes /* TODO: don't call for ENOENT or ENOTDIR? */ 6051573Srgrimes if (pglob->gl_errfunc) { 60674921Speter if (g_Ctoc(pathbuf, buf, sizeof(buf))) 60774918Speter return (GLOB_ABEND); 6081573Srgrimes if (pglob->gl_errfunc(buf, errno) || 6091573Srgrimes pglob->gl_flags & GLOB_ERR) 6101573Srgrimes return (GLOB_ABEND); 6111573Srgrimes } 6121573Srgrimes return(0); 6131573Srgrimes } 6141573Srgrimes 6151573Srgrimes err = 0; 6161573Srgrimes 6171573Srgrimes /* Search directory for matching names. */ 6181573Srgrimes if (pglob->gl_flags & GLOB_ALTDIRFUNC) 6191573Srgrimes readdirfunc = pglob->gl_readdir; 6201573Srgrimes else 6211573Srgrimes readdirfunc = readdir; 6221573Srgrimes while ((dp = (*readdirfunc)(dirp))) { 6231573Srgrimes register u_char *sc; 6241573Srgrimes register Char *dc; 6251573Srgrimes 6261573Srgrimes /* Initial DOT must be matched literally. */ 6271573Srgrimes if (dp->d_name[0] == DOT && *pattern != DOT) 6281573Srgrimes continue; 6298870Srgrimes for (sc = (u_char *) dp->d_name, dc = pathend; 6301573Srgrimes (*dc++ = *sc++) != EOS;) 6311573Srgrimes continue; 6321573Srgrimes if (!match(pathend, pattern, restpattern)) { 6331573Srgrimes *pathend = EOS; 6341573Srgrimes continue; 6351573Srgrimes } 63674469Sjlemon err = glob2(pathbuf, --dc, restpattern, pglob, limit); 6371573Srgrimes if (err) 6381573Srgrimes break; 6391573Srgrimes } 6401573Srgrimes 6411573Srgrimes if (pglob->gl_flags & GLOB_ALTDIRFUNC) 6421573Srgrimes (*pglob->gl_closedir)(dirp); 6431573Srgrimes else 6441573Srgrimes closedir(dirp); 6451573Srgrimes return(err); 6461573Srgrimes} 6471573Srgrimes 6481573Srgrimes 6491573Srgrimes/* 6501573Srgrimes * Extend the gl_pathv member of a glob_t structure to accomodate a new item, 6511573Srgrimes * add the new item, and update gl_pathc. 6521573Srgrimes * 6531573Srgrimes * This assumes the BSD realloc, which only copies the block when its size 6541573Srgrimes * crosses a power-of-two boundary; for v7 realloc, this would cause quadratic 6551573Srgrimes * behavior. 6561573Srgrimes * 6571573Srgrimes * Return 0 if new item added, error code if memory couldn't be allocated. 6581573Srgrimes * 6591573Srgrimes * Invariant of the glob_t structure: 6601573Srgrimes * Either gl_pathc is zero and gl_pathv is NULL; or gl_pathc > 0 and 6611573Srgrimes * gl_pathv points to (gl_offs + gl_pathc + 1) items. 6621573Srgrimes */ 6631573Srgrimesstatic int 66474469Sjlemonglobextend(path, pglob, limit) 6651573Srgrimes const Char *path; 6661573Srgrimes glob_t *pglob; 66774469Sjlemon int *limit; 6681573Srgrimes{ 6691573Srgrimes register char **pathv; 6701573Srgrimes register int i; 67174918Speter u_int newsize, len; 6721573Srgrimes char *copy; 6731573Srgrimes const Char *p; 6741573Srgrimes 67574469Sjlemon if (*limit && pglob->gl_pathc > *limit) 67674469Sjlemon return (GLOB_LIMIT); 67774307Sjlemon 6781573Srgrimes newsize = sizeof(*pathv) * (2 + pglob->gl_pathc + pglob->gl_offs); 6798870Srgrimes pathv = pglob->gl_pathv ? 6801573Srgrimes realloc((char *)pglob->gl_pathv, newsize) : 6811573Srgrimes malloc(newsize); 68274918Speter if (pathv == NULL) { 68374918Speter if (pglob->gl_pathv) { 68474918Speter free(pglob->gl_pathv); 68574918Speter pglob->gl_pathv = NULL; 68674918Speter } 6871573Srgrimes return(GLOB_NOSPACE); 68874918Speter } 6891573Srgrimes 6901573Srgrimes if (pglob->gl_pathv == NULL && pglob->gl_offs > 0) { 6911573Srgrimes /* first time around -- clear initial gl_offs items */ 6921573Srgrimes pathv += pglob->gl_offs; 6931573Srgrimes for (i = pglob->gl_offs; --i >= 0; ) 6941573Srgrimes *--pathv = NULL; 6951573Srgrimes } 6961573Srgrimes pglob->gl_pathv = pathv; 6971573Srgrimes 6981573Srgrimes for (p = path; *p++;) 6991573Srgrimes continue; 70074918Speter len = (size_t)(p - path); 70174921Speter if ((copy = malloc(len)) != NULL) { 70274921Speter if (g_Ctoc(path, copy, len)) { 70374918Speter free(copy); 70474918Speter return (GLOB_NOSPACE); 70574918Speter } 7061573Srgrimes pathv[pglob->gl_offs + pglob->gl_pathc++] = copy; 7071573Srgrimes } 7081573Srgrimes pathv[pglob->gl_offs + pglob->gl_pathc] = NULL; 7091573Srgrimes return(copy == NULL ? GLOB_NOSPACE : 0); 7101573Srgrimes} 7111573Srgrimes 7121573Srgrimes/* 7131573Srgrimes * pattern matching function for filenames. Each occurrence of the * 7141573Srgrimes * pattern causes a recursion level. 7151573Srgrimes */ 7161573Srgrimesstatic int 7171573Srgrimesmatch(name, pat, patend) 7181573Srgrimes register Char *name, *pat, *patend; 7191573Srgrimes{ 7201573Srgrimes int ok, negate_range; 7211573Srgrimes Char c, k; 7221573Srgrimes 7231573Srgrimes while (pat < patend) { 7241573Srgrimes c = *pat++; 7251573Srgrimes switch (c & M_MASK) { 7261573Srgrimes case M_ALL: 7271573Srgrimes if (pat == patend) 7281573Srgrimes return(1); 7298870Srgrimes do 7301573Srgrimes if (match(name, pat, patend)) 7311573Srgrimes return(1); 7321573Srgrimes while (*name++ != EOS); 7331573Srgrimes return(0); 7341573Srgrimes case M_ONE: 7351573Srgrimes if (*name++ == EOS) 7361573Srgrimes return(0); 7371573Srgrimes break; 7381573Srgrimes case M_SET: 7391573Srgrimes ok = 0; 7401573Srgrimes if ((k = *name++) == EOS) 7411573Srgrimes return(0); 7421573Srgrimes if ((negate_range = ((*pat & M_MASK) == M_NOT)) != EOS) 7431573Srgrimes ++pat; 7441573Srgrimes while (((c = *pat++) & M_MASK) != M_END) 7451573Srgrimes if ((*pat & M_MASK) == M_RNG) { 74624633Sache if (__collate_load_error ? 74724633Sache CHAR(c) <= CHAR(k) && CHAR(k) <= CHAR(pat[1]) : 74824633Sache __collate_range_cmp(CHAR(c), CHAR(k)) <= 0 74919276Sache && __collate_range_cmp(CHAR(k), CHAR(pat[1])) <= 0 75017528Sache ) 7511573Srgrimes ok = 1; 7521573Srgrimes pat += 2; 7531573Srgrimes } else if (c == k) 7541573Srgrimes ok = 1; 7551573Srgrimes if (ok == negate_range) 7561573Srgrimes return(0); 7571573Srgrimes break; 7581573Srgrimes default: 7591573Srgrimes if (*name++ != c) 7601573Srgrimes return(0); 7611573Srgrimes break; 7621573Srgrimes } 7631573Srgrimes } 7641573Srgrimes return(*name == EOS); 7651573Srgrimes} 7661573Srgrimes 7671573Srgrimes/* Free allocated data belonging to a glob_t structure. */ 7681573Srgrimesvoid 7691573Srgrimesglobfree(pglob) 7701573Srgrimes glob_t *pglob; 7711573Srgrimes{ 7721573Srgrimes register int i; 7731573Srgrimes register char **pp; 7741573Srgrimes 7751573Srgrimes if (pglob->gl_pathv != NULL) { 7761573Srgrimes pp = pglob->gl_pathv + pglob->gl_offs; 7771573Srgrimes for (i = pglob->gl_pathc; i--; ++pp) 7781573Srgrimes if (*pp) 7791573Srgrimes free(*pp); 7801573Srgrimes free(pglob->gl_pathv); 78174918Speter pglob->gl_pathv = NULL; 7821573Srgrimes } 7831573Srgrimes} 7841573Srgrimes 7851573Srgrimesstatic DIR * 7861573Srgrimesg_opendir(str, pglob) 7871573Srgrimes register Char *str; 7881573Srgrimes glob_t *pglob; 7891573Srgrimes{ 7901573Srgrimes char buf[MAXPATHLEN]; 7911573Srgrimes 7921573Srgrimes if (!*str) 7931573Srgrimes strcpy(buf, "."); 79474918Speter else { 79574921Speter if (g_Ctoc(str, buf, sizeof(buf))) 79674918Speter return (NULL); 79774918Speter } 7981573Srgrimes 7991573Srgrimes if (pglob->gl_flags & GLOB_ALTDIRFUNC) 8001573Srgrimes return((*pglob->gl_opendir)(buf)); 8011573Srgrimes 8021573Srgrimes return(opendir(buf)); 8031573Srgrimes} 8041573Srgrimes 8051573Srgrimesstatic int 8061573Srgrimesg_lstat(fn, sb, pglob) 8071573Srgrimes register Char *fn; 8081573Srgrimes struct stat *sb; 8091573Srgrimes glob_t *pglob; 8101573Srgrimes{ 8111573Srgrimes char buf[MAXPATHLEN]; 8121573Srgrimes 81374921Speter if (g_Ctoc(fn, buf, sizeof(buf))) { 81474918Speter errno = ENAMETOOLONG; 81574918Speter return (-1); 81674918Speter } 8171573Srgrimes if (pglob->gl_flags & GLOB_ALTDIRFUNC) 8181573Srgrimes return((*pglob->gl_lstat)(buf, sb)); 8191573Srgrimes return(lstat(buf, sb)); 8201573Srgrimes} 8211573Srgrimes 8221573Srgrimesstatic int 8231573Srgrimesg_stat(fn, sb, pglob) 8241573Srgrimes register Char *fn; 8251573Srgrimes struct stat *sb; 8261573Srgrimes glob_t *pglob; 8271573Srgrimes{ 8281573Srgrimes char buf[MAXPATHLEN]; 8291573Srgrimes 83074921Speter if (g_Ctoc(fn, buf, sizeof(buf))) { 83174918Speter errno = ENAMETOOLONG; 83274918Speter return (-1); 83374918Speter } 8341573Srgrimes if (pglob->gl_flags & GLOB_ALTDIRFUNC) 8351573Srgrimes return((*pglob->gl_stat)(buf, sb)); 8361573Srgrimes return(stat(buf, sb)); 8371573Srgrimes} 8381573Srgrimes 8391573Srgrimesstatic Char * 8401573Srgrimesg_strchr(str, ch) 8411573Srgrimes Char *str; 8421573Srgrimes int ch; 8431573Srgrimes{ 8441573Srgrimes do { 8451573Srgrimes if (*str == ch) 8461573Srgrimes return (str); 8471573Srgrimes } while (*str++); 8481573Srgrimes return (NULL); 8491573Srgrimes} 8501573Srgrimes 8511573Srgrimes#ifdef notdef 8521573Srgrimesstatic Char * 8531573Srgrimesg_strcat(dst, src) 8541573Srgrimes Char *dst; 8551573Srgrimes const Char* src; 8561573Srgrimes{ 8571573Srgrimes Char *sdst = dst; 8581573Srgrimes 8591573Srgrimes while (*dst++) 8601573Srgrimes continue; 8611573Srgrimes --dst; 8621573Srgrimes while((*dst++ = *src++) != EOS) 8631573Srgrimes continue; 8641573Srgrimes 8651573Srgrimes return (sdst); 8661573Srgrimes} 8671573Srgrimes#endif 8681573Srgrimes 86974918Speterstatic int 87074921Speterg_Ctoc(str, buf, len) 87174921Speter const Char *str; 87274921Speter char *buf; 87374921Speter u_int len; 8741573Srgrimes{ 8751573Srgrimes 87674921Speter while (len--) { 87774921Speter if ((*buf++ = *str++) == '\0') 87874921Speter return (0); 87974921Speter } 88074921Speter return (1); 8811573Srgrimes} 8821573Srgrimes 8831573Srgrimes#ifdef DEBUG 8848870Srgrimesstatic void 8851573Srgrimesqprintf(str, s) 8861573Srgrimes const char *str; 8871573Srgrimes register Char *s; 8881573Srgrimes{ 8891573Srgrimes register Char *p; 8901573Srgrimes 8911573Srgrimes (void)printf("%s:\n", str); 8921573Srgrimes for (p = s; *p; p++) 8931573Srgrimes (void)printf("%c", CHAR(*p)); 8941573Srgrimes (void)printf("\n"); 8951573Srgrimes for (p = s; *p; p++) 8961573Srgrimes (void)printf("%c", *p & M_PROTECT ? '"' : ' '); 8971573Srgrimes (void)printf("\n"); 8981573Srgrimes for (p = s; *p; p++) 8991573Srgrimes (void)printf("%c", ismeta(*p) ? '_' : ' '); 9001573Srgrimes (void)printf("\n"); 9011573Srgrimes} 9021573Srgrimes#endif 903