glob.c revision 19276
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. 351573Srgrimes */ 361573Srgrimes 371573Srgrimes#if defined(LIBC_SCCS) && !defined(lint) 381573Srgrimesstatic char sccsid[] = "@(#)glob.c 8.3 (Berkeley) 10/13/93"; 391573Srgrimes#endif /* LIBC_SCCS and not lint */ 401573Srgrimes 411573Srgrimes/* 421573Srgrimes * glob(3) -- a superset of the one defined in POSIX 1003.2. 431573Srgrimes * 441573Srgrimes * The [!...] convention to negate a range is supported (SysV, Posix, ksh). 451573Srgrimes * 461573Srgrimes * Optional extra services, controlled by flags not defined by POSIX: 471573Srgrimes * 481573Srgrimes * GLOB_QUOTE: 491573Srgrimes * Escaping convention: \ inhibits any special meaning the following 501573Srgrimes * character might have (except \ at end of string is retained). 511573Srgrimes * GLOB_MAGCHAR: 521573Srgrimes * Set in gl_flags if pattern contained a globbing character. 531573Srgrimes * GLOB_NOMAGIC: 541573Srgrimes * Same as GLOB_NOCHECK, but it will only append pattern if it did 551573Srgrimes * not contain any magic characters. [Used in csh style globbing] 561573Srgrimes * GLOB_ALTDIRFUNC: 571573Srgrimes * Use alternately specified directory access functions. 581573Srgrimes * GLOB_TILDE: 591573Srgrimes * expand ~user/foo to the /home/dir/of/user/foo 601573Srgrimes * GLOB_BRACE: 618870Srgrimes * expand {1,2}{a,b} to 1a 1b 2a 2b 621573Srgrimes * gl_matchc: 631573Srgrimes * Number of matches in the current invocation of glob. 641573Srgrimes */ 651573Srgrimes 661573Srgrimes#include <sys/param.h> 671573Srgrimes#include <sys/stat.h> 681573Srgrimes 691573Srgrimes#include <ctype.h> 701573Srgrimes#include <dirent.h> 711573Srgrimes#include <errno.h> 721573Srgrimes#include <glob.h> 731573Srgrimes#include <pwd.h> 741573Srgrimes#include <stdio.h> 751573Srgrimes#include <stdlib.h> 761573Srgrimes#include <string.h> 771573Srgrimes#include <unistd.h> 781573Srgrimes 7919276Sache#include "collate.h" 8019276Sache 811573Srgrimes#define DOLLAR '$' 821573Srgrimes#define DOT '.' 831573Srgrimes#define EOS '\0' 841573Srgrimes#define LBRACKET '[' 851573Srgrimes#define NOT '!' 861573Srgrimes#define QUESTION '?' 871573Srgrimes#define QUOTE '\\' 881573Srgrimes#define RANGE '-' 891573Srgrimes#define RBRACKET ']' 901573Srgrimes#define SEP '/' 911573Srgrimes#define STAR '*' 921573Srgrimes#define TILDE '~' 931573Srgrimes#define UNDERSCORE '_' 941573Srgrimes#define LBRACE '{' 951573Srgrimes#define RBRACE '}' 961573Srgrimes#define SLASH '/' 971573Srgrimes#define COMMA ',' 981573Srgrimes 991573Srgrimes#ifndef DEBUG 1001573Srgrimes 1011573Srgrimes#define M_QUOTE 0x8000 1021573Srgrimes#define M_PROTECT 0x4000 1031573Srgrimes#define M_MASK 0xffff 1041573Srgrimes#define M_ASCII 0x00ff 1051573Srgrimes 1061573Srgrimestypedef u_short Char; 1071573Srgrimes 1081573Srgrimes#else 1091573Srgrimes 1101573Srgrimes#define M_QUOTE 0x80 1111573Srgrimes#define M_PROTECT 0x40 1121573Srgrimes#define M_MASK 0xff 1131573Srgrimes#define M_ASCII 0x7f 1141573Srgrimes 1151573Srgrimestypedef char Char; 1161573Srgrimes 1171573Srgrimes#endif 1181573Srgrimes 1191573Srgrimes 1201573Srgrimes#define CHAR(c) ((Char)((c)&M_ASCII)) 1211573Srgrimes#define META(c) ((Char)((c)|M_QUOTE)) 1221573Srgrimes#define M_ALL META('*') 1231573Srgrimes#define M_END META(']') 1241573Srgrimes#define M_NOT META('!') 1251573Srgrimes#define M_ONE META('?') 1261573Srgrimes#define M_RNG META('-') 1271573Srgrimes#define M_SET META('[') 1281573Srgrimes#define ismeta(c) (((c)&M_QUOTE) != 0) 1291573Srgrimes 1301573Srgrimes 1311573Srgrimesstatic int compare __P((const void *, const void *)); 1321573Srgrimesstatic void g_Ctoc __P((const Char *, char *)); 1331573Srgrimesstatic int g_lstat __P((Char *, struct stat *, glob_t *)); 1341573Srgrimesstatic DIR *g_opendir __P((Char *, glob_t *)); 1351573Srgrimesstatic Char *g_strchr __P((Char *, int)); 1361573Srgrimes#ifdef notdef 1371573Srgrimesstatic Char *g_strcat __P((Char *, const Char *)); 1381573Srgrimes#endif 1391573Srgrimesstatic int g_stat __P((Char *, struct stat *, glob_t *)); 1401573Srgrimesstatic int glob0 __P((const Char *, glob_t *)); 1411573Srgrimesstatic int glob1 __P((Char *, glob_t *)); 1421573Srgrimesstatic int glob2 __P((Char *, Char *, Char *, glob_t *)); 1431573Srgrimesstatic int glob3 __P((Char *, Char *, Char *, Char *, glob_t *)); 1441573Srgrimesstatic int globextend __P((const Char *, glob_t *)); 1451573Srgrimesstatic const Char * globtilde __P((const Char *, Char *, glob_t *)); 1461573Srgrimesstatic int globexp1 __P((const Char *, glob_t *)); 1471573Srgrimesstatic int globexp2 __P((const Char *, const Char *, glob_t *, int *)); 1481573Srgrimesstatic int match __P((Char *, Char *, Char *)); 1491573Srgrimes#ifdef DEBUG 1501573Srgrimesstatic void qprintf __P((const char *, Char *)); 1511573Srgrimes#endif 1521573Srgrimes 1531573Srgrimesint 1541573Srgrimesglob(pattern, flags, errfunc, pglob) 1551573Srgrimes const char *pattern; 1561573Srgrimes int flags, (*errfunc) __P((const char *, int)); 1571573Srgrimes glob_t *pglob; 1581573Srgrimes{ 1591573Srgrimes const u_char *patnext; 1601573Srgrimes int c; 1611573Srgrimes Char *bufnext, *bufend, patbuf[MAXPATHLEN+1]; 1621573Srgrimes 1631573Srgrimes patnext = (u_char *) pattern; 1641573Srgrimes if (!(flags & GLOB_APPEND)) { 1651573Srgrimes pglob->gl_pathc = 0; 1661573Srgrimes pglob->gl_pathv = NULL; 1671573Srgrimes if (!(flags & GLOB_DOOFFS)) 1681573Srgrimes pglob->gl_offs = 0; 1691573Srgrimes } 1701573Srgrimes pglob->gl_flags = flags & ~GLOB_MAGCHAR; 1711573Srgrimes pglob->gl_errfunc = errfunc; 1721573Srgrimes pglob->gl_matchc = 0; 1731573Srgrimes 1741573Srgrimes bufnext = patbuf; 1751573Srgrimes bufend = bufnext + MAXPATHLEN; 1761573Srgrimes if (flags & GLOB_QUOTE) { 1771573Srgrimes /* Protect the quoted characters. */ 1788870Srgrimes while (bufnext < bufend && (c = *patnext++) != EOS) 1791573Srgrimes if (c == QUOTE) { 1801573Srgrimes if ((c = *patnext++) == EOS) { 1811573Srgrimes c = QUOTE; 1821573Srgrimes --patnext; 1831573Srgrimes } 1841573Srgrimes *bufnext++ = c | M_PROTECT; 1851573Srgrimes } 1861573Srgrimes else 1871573Srgrimes *bufnext++ = c; 1881573Srgrimes } 1898870Srgrimes else 1908870Srgrimes while (bufnext < bufend && (c = *patnext++) != EOS) 1911573Srgrimes *bufnext++ = c; 1921573Srgrimes *bufnext = EOS; 1931573Srgrimes 1941573Srgrimes if (flags & GLOB_BRACE) 1951573Srgrimes return globexp1(patbuf, pglob); 1961573Srgrimes else 1971573Srgrimes return glob0(patbuf, pglob); 1981573Srgrimes} 1991573Srgrimes 2001573Srgrimes/* 2011573Srgrimes * Expand recursively a glob {} pattern. When there is no more expansion 2021573Srgrimes * invoke the standard globbing routine to glob the rest of the magic 2031573Srgrimes * characters 2041573Srgrimes */ 2051573Srgrimesstatic int globexp1(pattern, pglob) 2061573Srgrimes const Char *pattern; 2071573Srgrimes glob_t *pglob; 2081573Srgrimes{ 2091573Srgrimes const Char* ptr = pattern; 2101573Srgrimes int rv; 2111573Srgrimes 2121573Srgrimes /* Protect a single {}, for find(1), like csh */ 2131573Srgrimes if (pattern[0] == LBRACE && pattern[1] == RBRACE && pattern[2] == EOS) 2141573Srgrimes return glob0(pattern, pglob); 2151573Srgrimes 2161573Srgrimes while ((ptr = (const Char *) g_strchr((Char *) ptr, LBRACE)) != NULL) 2171573Srgrimes if (!globexp2(ptr, pattern, pglob, &rv)) 2181573Srgrimes return rv; 2191573Srgrimes 2201573Srgrimes return glob0(pattern, pglob); 2211573Srgrimes} 2221573Srgrimes 2231573Srgrimes 2241573Srgrimes/* 2251573Srgrimes * Recursive brace globbing helper. Tries to expand a single brace. 2261573Srgrimes * If it succeeds then it invokes globexp1 with the new pattern. 2271573Srgrimes * If it fails then it tries to glob the rest of the pattern and returns. 2281573Srgrimes */ 2291573Srgrimesstatic int globexp2(ptr, pattern, pglob, rv) 2301573Srgrimes const Char *ptr, *pattern; 2311573Srgrimes glob_t *pglob; 2321573Srgrimes int *rv; 2331573Srgrimes{ 2341573Srgrimes int i; 2351573Srgrimes Char *lm, *ls; 2361573Srgrimes const Char *pe, *pm, *pl; 2371573Srgrimes Char patbuf[MAXPATHLEN + 1]; 2381573Srgrimes 2391573Srgrimes /* copy part up to the brace */ 2401573Srgrimes for (lm = patbuf, pm = pattern; pm != ptr; *lm++ = *pm++) 2411573Srgrimes continue; 2421573Srgrimes ls = lm; 2431573Srgrimes 2441573Srgrimes /* Find the balanced brace */ 2451573Srgrimes for (i = 0, pe = ++ptr; *pe; pe++) 2461573Srgrimes if (*pe == LBRACKET) { 2471573Srgrimes /* Ignore everything between [] */ 2481573Srgrimes for (pm = pe++; *pe != RBRACKET && *pe != EOS; pe++) 2491573Srgrimes continue; 2501573Srgrimes if (*pe == EOS) { 2518870Srgrimes /* 2521573Srgrimes * We could not find a matching RBRACKET. 2531573Srgrimes * Ignore and just look for RBRACE 2541573Srgrimes */ 2551573Srgrimes pe = pm; 2561573Srgrimes } 2571573Srgrimes } 2581573Srgrimes else if (*pe == LBRACE) 2591573Srgrimes i++; 2601573Srgrimes else if (*pe == RBRACE) { 2611573Srgrimes if (i == 0) 2621573Srgrimes break; 2631573Srgrimes i--; 2641573Srgrimes } 2651573Srgrimes 2661573Srgrimes /* Non matching braces; just glob the pattern */ 2671573Srgrimes if (i != 0 || *pe == EOS) { 2681573Srgrimes *rv = glob0(patbuf, pglob); 2691573Srgrimes return 0; 2701573Srgrimes } 2711573Srgrimes 2721573Srgrimes for (i = 0, pl = pm = ptr; pm <= pe; pm++) 2731573Srgrimes switch (*pm) { 2741573Srgrimes case LBRACKET: 2751573Srgrimes /* Ignore everything between [] */ 2761573Srgrimes for (pl = pm++; *pm != RBRACKET && *pm != EOS; pm++) 2771573Srgrimes continue; 2781573Srgrimes if (*pm == EOS) { 2798870Srgrimes /* 2801573Srgrimes * We could not find a matching RBRACKET. 2811573Srgrimes * Ignore and just look for RBRACE 2821573Srgrimes */ 2831573Srgrimes pm = pl; 2841573Srgrimes } 2851573Srgrimes break; 2861573Srgrimes 2871573Srgrimes case LBRACE: 2881573Srgrimes i++; 2891573Srgrimes break; 2901573Srgrimes 2911573Srgrimes case RBRACE: 2921573Srgrimes if (i) { 2931573Srgrimes i--; 2941573Srgrimes break; 2951573Srgrimes } 2961573Srgrimes /* FALLTHROUGH */ 2971573Srgrimes case COMMA: 2981573Srgrimes if (i && *pm == COMMA) 2991573Srgrimes break; 3001573Srgrimes else { 3011573Srgrimes /* Append the current string */ 3021573Srgrimes for (lm = ls; (pl < pm); *lm++ = *pl++) 3031573Srgrimes continue; 3048870Srgrimes /* 3051573Srgrimes * Append the rest of the pattern after the 3061573Srgrimes * closing brace 3071573Srgrimes */ 3081573Srgrimes for (pl = pe + 1; (*lm++ = *pl++) != EOS;) 3091573Srgrimes continue; 3101573Srgrimes 3111573Srgrimes /* Expand the current pattern */ 3121573Srgrimes#ifdef DEBUG 3131573Srgrimes qprintf("globexp2:", patbuf); 3141573Srgrimes#endif 3151573Srgrimes *rv = globexp1(patbuf, pglob); 3161573Srgrimes 3171573Srgrimes /* move after the comma, to the next string */ 3181573Srgrimes pl = pm + 1; 3191573Srgrimes } 3201573Srgrimes break; 3211573Srgrimes 3221573Srgrimes default: 3231573Srgrimes break; 3241573Srgrimes } 3251573Srgrimes *rv = 0; 3261573Srgrimes return 0; 3271573Srgrimes} 3281573Srgrimes 3291573Srgrimes 3301573Srgrimes 3311573Srgrimes/* 3321573Srgrimes * expand tilde from the passwd file. 3331573Srgrimes */ 3341573Srgrimesstatic const Char * 3351573Srgrimesglobtilde(pattern, patbuf, pglob) 3361573Srgrimes const Char *pattern; 3371573Srgrimes Char *patbuf; 3381573Srgrimes glob_t *pglob; 3391573Srgrimes{ 3401573Srgrimes struct passwd *pwd; 3411573Srgrimes char *h; 3421573Srgrimes const Char *p; 3431573Srgrimes Char *b; 3441573Srgrimes 3451573Srgrimes if (*pattern != TILDE || !(pglob->gl_flags & GLOB_TILDE)) 3461573Srgrimes return pattern; 3471573Srgrimes 3481573Srgrimes /* Copy up to the end of the string or / */ 3498870Srgrimes for (p = pattern + 1, h = (char *) patbuf; *p && *p != SLASH; 3501573Srgrimes *h++ = *p++) 3511573Srgrimes continue; 3521573Srgrimes 3531573Srgrimes *h = EOS; 3541573Srgrimes 3551573Srgrimes if (((char *) patbuf)[0] == EOS) { 3568870Srgrimes /* 3578870Srgrimes * handle a plain ~ or ~/ by expanding $HOME 3581573Srgrimes * first and then trying the password file 3591573Srgrimes */ 3601573Srgrimes if ((h = getenv("HOME")) == NULL) { 3611573Srgrimes if ((pwd = getpwuid(getuid())) == NULL) 3621573Srgrimes return pattern; 3631573Srgrimes else 3641573Srgrimes h = pwd->pw_dir; 3651573Srgrimes } 3661573Srgrimes } 3671573Srgrimes else { 3681573Srgrimes /* 3691573Srgrimes * Expand a ~user 3701573Srgrimes */ 3711573Srgrimes if ((pwd = getpwnam((char*) patbuf)) == NULL) 3721573Srgrimes return pattern; 3731573Srgrimes else 3741573Srgrimes h = pwd->pw_dir; 3751573Srgrimes } 3761573Srgrimes 3771573Srgrimes /* Copy the home directory */ 3781573Srgrimes for (b = patbuf; *h; *b++ = *h++) 3791573Srgrimes continue; 3808870Srgrimes 3811573Srgrimes /* Append the rest of the pattern */ 3821573Srgrimes while ((*b++ = *p++) != EOS) 3831573Srgrimes continue; 3841573Srgrimes 3851573Srgrimes return patbuf; 3861573Srgrimes} 3871573Srgrimes 3888870Srgrimes 3891573Srgrimes/* 3901573Srgrimes * The main glob() routine: compiles the pattern (optionally processing 3911573Srgrimes * quotes), calls glob1() to do the real pattern matching, and finally 3921573Srgrimes * sorts the list (unless unsorted operation is requested). Returns 0 3931573Srgrimes * if things went well, nonzero if errors occurred. It is not an error 3941573Srgrimes * to find no matches. 3951573Srgrimes */ 3961573Srgrimesstatic int 3971573Srgrimesglob0(pattern, pglob) 3981573Srgrimes const Char *pattern; 3991573Srgrimes glob_t *pglob; 4001573Srgrimes{ 4011573Srgrimes const Char *qpatnext; 4021573Srgrimes int c, err, oldpathc; 4031573Srgrimes Char *bufnext, patbuf[MAXPATHLEN+1]; 4041573Srgrimes 4051573Srgrimes qpatnext = globtilde(pattern, patbuf, pglob); 4061573Srgrimes oldpathc = pglob->gl_pathc; 4071573Srgrimes bufnext = patbuf; 4081573Srgrimes 4091573Srgrimes /* We don't need to check for buffer overflow any more. */ 4101573Srgrimes while ((c = *qpatnext++) != EOS) { 4111573Srgrimes switch (c) { 4121573Srgrimes case LBRACKET: 4131573Srgrimes c = *qpatnext; 4141573Srgrimes if (c == NOT) 4151573Srgrimes ++qpatnext; 4161573Srgrimes if (*qpatnext == EOS || 4171573Srgrimes g_strchr((Char *) qpatnext+1, RBRACKET) == NULL) { 4181573Srgrimes *bufnext++ = LBRACKET; 4191573Srgrimes if (c == NOT) 4201573Srgrimes --qpatnext; 4211573Srgrimes break; 4221573Srgrimes } 4231573Srgrimes *bufnext++ = M_SET; 4241573Srgrimes if (c == NOT) 4251573Srgrimes *bufnext++ = M_NOT; 4261573Srgrimes c = *qpatnext++; 4271573Srgrimes do { 4281573Srgrimes *bufnext++ = CHAR(c); 4291573Srgrimes if (*qpatnext == RANGE && 4301573Srgrimes (c = qpatnext[1]) != RBRACKET) { 4311573Srgrimes *bufnext++ = M_RNG; 4321573Srgrimes *bufnext++ = CHAR(c); 4331573Srgrimes qpatnext += 2; 4341573Srgrimes } 4351573Srgrimes } while ((c = *qpatnext++) != RBRACKET); 4361573Srgrimes pglob->gl_flags |= GLOB_MAGCHAR; 4371573Srgrimes *bufnext++ = M_END; 4381573Srgrimes break; 4391573Srgrimes case QUESTION: 4401573Srgrimes pglob->gl_flags |= GLOB_MAGCHAR; 4411573Srgrimes *bufnext++ = M_ONE; 4421573Srgrimes break; 4431573Srgrimes case STAR: 4441573Srgrimes pglob->gl_flags |= GLOB_MAGCHAR; 4458870Srgrimes /* collapse adjacent stars to one, 4461573Srgrimes * to avoid exponential behavior 4471573Srgrimes */ 4481573Srgrimes if (bufnext == patbuf || bufnext[-1] != M_ALL) 4491573Srgrimes *bufnext++ = M_ALL; 4501573Srgrimes break; 4511573Srgrimes default: 4521573Srgrimes *bufnext++ = CHAR(c); 4531573Srgrimes break; 4541573Srgrimes } 4551573Srgrimes } 4561573Srgrimes *bufnext = EOS; 4571573Srgrimes#ifdef DEBUG 4581573Srgrimes qprintf("glob0:", patbuf); 4591573Srgrimes#endif 4601573Srgrimes 4611573Srgrimes if ((err = glob1(patbuf, pglob)) != 0) 4621573Srgrimes return(err); 4631573Srgrimes 4641573Srgrimes /* 4658870Srgrimes * If there was no match we are going to append the pattern 4661573Srgrimes * if GLOB_NOCHECK was specified or if GLOB_NOMAGIC was specified 4671573Srgrimes * and the pattern did not contain any magic characters 4681573Srgrimes * GLOB_NOMAGIC is there just for compatibility with csh. 4691573Srgrimes */ 4708870Srgrimes if (pglob->gl_pathc == oldpathc && 4718870Srgrimes ((pglob->gl_flags & GLOB_NOCHECK) || 4721573Srgrimes ((pglob->gl_flags & GLOB_NOMAGIC) && 4731573Srgrimes !(pglob->gl_flags & GLOB_MAGCHAR)))) 4741573Srgrimes return(globextend(pattern, pglob)); 4758870Srgrimes else if (!(pglob->gl_flags & GLOB_NOSORT)) 4761573Srgrimes qsort(pglob->gl_pathv + pglob->gl_offs + oldpathc, 4771573Srgrimes pglob->gl_pathc - oldpathc, sizeof(char *), compare); 4781573Srgrimes return(0); 4791573Srgrimes} 4801573Srgrimes 4811573Srgrimesstatic int 4821573Srgrimescompare(p, q) 4831573Srgrimes const void *p, *q; 4841573Srgrimes{ 4851573Srgrimes return(strcmp(*(char **)p, *(char **)q)); 4861573Srgrimes} 4871573Srgrimes 4881573Srgrimesstatic int 4891573Srgrimesglob1(pattern, pglob) 4901573Srgrimes Char *pattern; 4911573Srgrimes glob_t *pglob; 4921573Srgrimes{ 4931573Srgrimes Char pathbuf[MAXPATHLEN+1]; 4941573Srgrimes 4951573Srgrimes /* A null pathname is invalid -- POSIX 1003.1 sect. 2.4. */ 4961573Srgrimes if (*pattern == EOS) 4971573Srgrimes return(0); 4981573Srgrimes return(glob2(pathbuf, pathbuf, pattern, pglob)); 4991573Srgrimes} 5001573Srgrimes 5011573Srgrimes/* 5021573Srgrimes * The functions glob2 and glob3 are mutually recursive; there is one level 5031573Srgrimes * of recursion for each segment in the pattern that contains one or more 5041573Srgrimes * meta characters. 5051573Srgrimes */ 5061573Srgrimesstatic int 5071573Srgrimesglob2(pathbuf, pathend, pattern, pglob) 5081573Srgrimes Char *pathbuf, *pathend, *pattern; 5091573Srgrimes glob_t *pglob; 5101573Srgrimes{ 5111573Srgrimes struct stat sb; 5121573Srgrimes Char *p, *q; 5131573Srgrimes int anymeta; 5141573Srgrimes 5151573Srgrimes /* 5161573Srgrimes * Loop over pattern segments until end of pattern or until 5171573Srgrimes * segment with meta character found. 5181573Srgrimes */ 5191573Srgrimes for (anymeta = 0;;) { 5201573Srgrimes if (*pattern == EOS) { /* End of pattern? */ 5211573Srgrimes *pathend = EOS; 5221573Srgrimes if (g_lstat(pathbuf, &sb, pglob)) 5231573Srgrimes return(0); 5248870Srgrimes 5251573Srgrimes if (((pglob->gl_flags & GLOB_MARK) && 5261573Srgrimes pathend[-1] != SEP) && (S_ISDIR(sb.st_mode) 5271573Srgrimes || (S_ISLNK(sb.st_mode) && 5281573Srgrimes (g_stat(pathbuf, &sb, pglob) == 0) && 5291573Srgrimes S_ISDIR(sb.st_mode)))) { 5301573Srgrimes *pathend++ = SEP; 5311573Srgrimes *pathend = EOS; 5321573Srgrimes } 5331573Srgrimes ++pglob->gl_matchc; 5341573Srgrimes return(globextend(pathbuf, pglob)); 5351573Srgrimes } 5361573Srgrimes 5371573Srgrimes /* Find end of next segment, copy tentatively to pathend. */ 5381573Srgrimes q = pathend; 5391573Srgrimes p = pattern; 5401573Srgrimes while (*p != EOS && *p != SEP) { 5411573Srgrimes if (ismeta(*p)) 5421573Srgrimes anymeta = 1; 5431573Srgrimes *q++ = *p++; 5441573Srgrimes } 5451573Srgrimes 5461573Srgrimes if (!anymeta) { /* No expansion, do next segment. */ 5471573Srgrimes pathend = q; 5481573Srgrimes pattern = p; 5491573Srgrimes while (*pattern == SEP) 5501573Srgrimes *pathend++ = *pattern++; 5511573Srgrimes } else /* Need expansion, recurse. */ 5521573Srgrimes return(glob3(pathbuf, pathend, pattern, p, pglob)); 5531573Srgrimes } 5541573Srgrimes /* NOTREACHED */ 5551573Srgrimes} 5561573Srgrimes 5571573Srgrimesstatic int 5581573Srgrimesglob3(pathbuf, pathend, pattern, restpattern, pglob) 5591573Srgrimes Char *pathbuf, *pathend, *pattern, *restpattern; 5601573Srgrimes glob_t *pglob; 5611573Srgrimes{ 5621573Srgrimes register struct dirent *dp; 5631573Srgrimes DIR *dirp; 5641573Srgrimes int err; 5651573Srgrimes char buf[MAXPATHLEN]; 5661573Srgrimes 5671573Srgrimes /* 5681573Srgrimes * The readdirfunc declaration can't be prototyped, because it is 5691573Srgrimes * assigned, below, to two functions which are prototyped in glob.h 5701573Srgrimes * and dirent.h as taking pointers to differently typed opaque 5711573Srgrimes * structures. 5721573Srgrimes */ 5731573Srgrimes struct dirent *(*readdirfunc)(); 5741573Srgrimes 5751573Srgrimes *pathend = EOS; 5761573Srgrimes errno = 0; 5778870Srgrimes 5781573Srgrimes if ((dirp = g_opendir(pathbuf, pglob)) == NULL) { 5791573Srgrimes /* TODO: don't call for ENOENT or ENOTDIR? */ 5801573Srgrimes if (pglob->gl_errfunc) { 5811573Srgrimes g_Ctoc(pathbuf, buf); 5821573Srgrimes if (pglob->gl_errfunc(buf, errno) || 5831573Srgrimes pglob->gl_flags & GLOB_ERR) 5841573Srgrimes return (GLOB_ABEND); 5851573Srgrimes } 5861573Srgrimes return(0); 5871573Srgrimes } 5881573Srgrimes 5891573Srgrimes err = 0; 5901573Srgrimes 5911573Srgrimes /* Search directory for matching names. */ 5921573Srgrimes if (pglob->gl_flags & GLOB_ALTDIRFUNC) 5931573Srgrimes readdirfunc = pglob->gl_readdir; 5941573Srgrimes else 5951573Srgrimes readdirfunc = readdir; 5961573Srgrimes while ((dp = (*readdirfunc)(dirp))) { 5971573Srgrimes register u_char *sc; 5981573Srgrimes register Char *dc; 5991573Srgrimes 6001573Srgrimes /* Initial DOT must be matched literally. */ 6011573Srgrimes if (dp->d_name[0] == DOT && *pattern != DOT) 6021573Srgrimes continue; 6038870Srgrimes for (sc = (u_char *) dp->d_name, dc = pathend; 6041573Srgrimes (*dc++ = *sc++) != EOS;) 6051573Srgrimes continue; 6061573Srgrimes if (!match(pathend, pattern, restpattern)) { 6071573Srgrimes *pathend = EOS; 6081573Srgrimes continue; 6091573Srgrimes } 6101573Srgrimes err = glob2(pathbuf, --dc, restpattern, pglob); 6111573Srgrimes if (err) 6121573Srgrimes break; 6131573Srgrimes } 6141573Srgrimes 6151573Srgrimes if (pglob->gl_flags & GLOB_ALTDIRFUNC) 6161573Srgrimes (*pglob->gl_closedir)(dirp); 6171573Srgrimes else 6181573Srgrimes closedir(dirp); 6191573Srgrimes return(err); 6201573Srgrimes} 6211573Srgrimes 6221573Srgrimes 6231573Srgrimes/* 6241573Srgrimes * Extend the gl_pathv member of a glob_t structure to accomodate a new item, 6251573Srgrimes * add the new item, and update gl_pathc. 6261573Srgrimes * 6271573Srgrimes * This assumes the BSD realloc, which only copies the block when its size 6281573Srgrimes * crosses a power-of-two boundary; for v7 realloc, this would cause quadratic 6291573Srgrimes * behavior. 6301573Srgrimes * 6311573Srgrimes * Return 0 if new item added, error code if memory couldn't be allocated. 6321573Srgrimes * 6331573Srgrimes * Invariant of the glob_t structure: 6341573Srgrimes * Either gl_pathc is zero and gl_pathv is NULL; or gl_pathc > 0 and 6351573Srgrimes * gl_pathv points to (gl_offs + gl_pathc + 1) items. 6361573Srgrimes */ 6371573Srgrimesstatic int 6381573Srgrimesglobextend(path, pglob) 6391573Srgrimes const Char *path; 6401573Srgrimes glob_t *pglob; 6411573Srgrimes{ 6421573Srgrimes register char **pathv; 6431573Srgrimes register int i; 6441573Srgrimes u_int newsize; 6451573Srgrimes char *copy; 6461573Srgrimes const Char *p; 6471573Srgrimes 6481573Srgrimes newsize = sizeof(*pathv) * (2 + pglob->gl_pathc + pglob->gl_offs); 6498870Srgrimes pathv = pglob->gl_pathv ? 6501573Srgrimes realloc((char *)pglob->gl_pathv, newsize) : 6511573Srgrimes malloc(newsize); 6521573Srgrimes if (pathv == NULL) 6531573Srgrimes return(GLOB_NOSPACE); 6541573Srgrimes 6551573Srgrimes if (pglob->gl_pathv == NULL && pglob->gl_offs > 0) { 6561573Srgrimes /* first time around -- clear initial gl_offs items */ 6571573Srgrimes pathv += pglob->gl_offs; 6581573Srgrimes for (i = pglob->gl_offs; --i >= 0; ) 6591573Srgrimes *--pathv = NULL; 6601573Srgrimes } 6611573Srgrimes pglob->gl_pathv = pathv; 6621573Srgrimes 6631573Srgrimes for (p = path; *p++;) 6641573Srgrimes continue; 6651573Srgrimes if ((copy = malloc(p - path)) != NULL) { 6661573Srgrimes g_Ctoc(path, copy); 6671573Srgrimes pathv[pglob->gl_offs + pglob->gl_pathc++] = copy; 6681573Srgrimes } 6691573Srgrimes pathv[pglob->gl_offs + pglob->gl_pathc] = NULL; 6701573Srgrimes return(copy == NULL ? GLOB_NOSPACE : 0); 6711573Srgrimes} 6721573Srgrimes 6731573Srgrimes/* 6741573Srgrimes * pattern matching function for filenames. Each occurrence of the * 6751573Srgrimes * pattern causes a recursion level. 6761573Srgrimes */ 6771573Srgrimesstatic int 6781573Srgrimesmatch(name, pat, patend) 6791573Srgrimes register Char *name, *pat, *patend; 6801573Srgrimes{ 6811573Srgrimes int ok, negate_range; 6821573Srgrimes Char c, k; 6831573Srgrimes 6841573Srgrimes while (pat < patend) { 6851573Srgrimes c = *pat++; 6861573Srgrimes switch (c & M_MASK) { 6871573Srgrimes case M_ALL: 6881573Srgrimes if (pat == patend) 6891573Srgrimes return(1); 6908870Srgrimes do 6911573Srgrimes if (match(name, pat, patend)) 6921573Srgrimes return(1); 6931573Srgrimes while (*name++ != EOS); 6941573Srgrimes return(0); 6951573Srgrimes case M_ONE: 6961573Srgrimes if (*name++ == EOS) 6971573Srgrimes return(0); 6981573Srgrimes break; 6991573Srgrimes case M_SET: 7001573Srgrimes ok = 0; 7011573Srgrimes if ((k = *name++) == EOS) 7021573Srgrimes return(0); 7031573Srgrimes if ((negate_range = ((*pat & M_MASK) == M_NOT)) != EOS) 7041573Srgrimes ++pat; 7051573Srgrimes while (((c = *pat++) & M_MASK) != M_END) 7061573Srgrimes if ((*pat & M_MASK) == M_RNG) { 70719276Sache if ( __collate_range_cmp(CHAR(c), CHAR(k)) <= 0 70819276Sache && __collate_range_cmp(CHAR(k), CHAR(pat[1])) <= 0 70917528Sache ) 7101573Srgrimes ok = 1; 7111573Srgrimes pat += 2; 7121573Srgrimes } else if (c == k) 7131573Srgrimes ok = 1; 7141573Srgrimes if (ok == negate_range) 7151573Srgrimes return(0); 7161573Srgrimes break; 7171573Srgrimes default: 7181573Srgrimes if (*name++ != c) 7191573Srgrimes return(0); 7201573Srgrimes break; 7211573Srgrimes } 7221573Srgrimes } 7231573Srgrimes return(*name == EOS); 7241573Srgrimes} 7251573Srgrimes 7261573Srgrimes/* Free allocated data belonging to a glob_t structure. */ 7271573Srgrimesvoid 7281573Srgrimesglobfree(pglob) 7291573Srgrimes glob_t *pglob; 7301573Srgrimes{ 7311573Srgrimes register int i; 7321573Srgrimes register char **pp; 7331573Srgrimes 7341573Srgrimes if (pglob->gl_pathv != NULL) { 7351573Srgrimes pp = pglob->gl_pathv + pglob->gl_offs; 7361573Srgrimes for (i = pglob->gl_pathc; i--; ++pp) 7371573Srgrimes if (*pp) 7381573Srgrimes free(*pp); 7391573Srgrimes free(pglob->gl_pathv); 7401573Srgrimes } 7411573Srgrimes} 7421573Srgrimes 7431573Srgrimesstatic DIR * 7441573Srgrimesg_opendir(str, pglob) 7451573Srgrimes register Char *str; 7461573Srgrimes glob_t *pglob; 7471573Srgrimes{ 7481573Srgrimes char buf[MAXPATHLEN]; 7491573Srgrimes 7501573Srgrimes if (!*str) 7511573Srgrimes strcpy(buf, "."); 7521573Srgrimes else 7531573Srgrimes g_Ctoc(str, buf); 7541573Srgrimes 7551573Srgrimes if (pglob->gl_flags & GLOB_ALTDIRFUNC) 7561573Srgrimes return((*pglob->gl_opendir)(buf)); 7571573Srgrimes 7581573Srgrimes return(opendir(buf)); 7591573Srgrimes} 7601573Srgrimes 7611573Srgrimesstatic int 7621573Srgrimesg_lstat(fn, sb, pglob) 7631573Srgrimes register Char *fn; 7641573Srgrimes struct stat *sb; 7651573Srgrimes glob_t *pglob; 7661573Srgrimes{ 7671573Srgrimes char buf[MAXPATHLEN]; 7681573Srgrimes 7691573Srgrimes g_Ctoc(fn, buf); 7701573Srgrimes if (pglob->gl_flags & GLOB_ALTDIRFUNC) 7711573Srgrimes return((*pglob->gl_lstat)(buf, sb)); 7721573Srgrimes return(lstat(buf, sb)); 7731573Srgrimes} 7741573Srgrimes 7751573Srgrimesstatic int 7761573Srgrimesg_stat(fn, sb, pglob) 7771573Srgrimes register Char *fn; 7781573Srgrimes struct stat *sb; 7791573Srgrimes glob_t *pglob; 7801573Srgrimes{ 7811573Srgrimes char buf[MAXPATHLEN]; 7821573Srgrimes 7831573Srgrimes g_Ctoc(fn, buf); 7841573Srgrimes if (pglob->gl_flags & GLOB_ALTDIRFUNC) 7851573Srgrimes return((*pglob->gl_stat)(buf, sb)); 7861573Srgrimes return(stat(buf, sb)); 7871573Srgrimes} 7881573Srgrimes 7891573Srgrimesstatic Char * 7901573Srgrimesg_strchr(str, ch) 7911573Srgrimes Char *str; 7921573Srgrimes int ch; 7931573Srgrimes{ 7941573Srgrimes do { 7951573Srgrimes if (*str == ch) 7961573Srgrimes return (str); 7971573Srgrimes } while (*str++); 7981573Srgrimes return (NULL); 7991573Srgrimes} 8001573Srgrimes 8011573Srgrimes#ifdef notdef 8021573Srgrimesstatic Char * 8031573Srgrimesg_strcat(dst, src) 8041573Srgrimes Char *dst; 8051573Srgrimes const Char* src; 8061573Srgrimes{ 8071573Srgrimes Char *sdst = dst; 8081573Srgrimes 8091573Srgrimes while (*dst++) 8101573Srgrimes continue; 8111573Srgrimes --dst; 8121573Srgrimes while((*dst++ = *src++) != EOS) 8131573Srgrimes continue; 8141573Srgrimes 8151573Srgrimes return (sdst); 8161573Srgrimes} 8171573Srgrimes#endif 8181573Srgrimes 8191573Srgrimesstatic void 8201573Srgrimesg_Ctoc(str, buf) 8211573Srgrimes register const Char *str; 8221573Srgrimes char *buf; 8231573Srgrimes{ 8241573Srgrimes register char *dc; 8251573Srgrimes 8261573Srgrimes for (dc = buf; (*dc++ = *str++) != EOS;) 8271573Srgrimes continue; 8281573Srgrimes} 8291573Srgrimes 8301573Srgrimes#ifdef DEBUG 8318870Srgrimesstatic void 8321573Srgrimesqprintf(str, s) 8331573Srgrimes const char *str; 8341573Srgrimes register Char *s; 8351573Srgrimes{ 8361573Srgrimes register Char *p; 8371573Srgrimes 8381573Srgrimes (void)printf("%s:\n", str); 8391573Srgrimes for (p = s; *p; p++) 8401573Srgrimes (void)printf("%c", CHAR(*p)); 8411573Srgrimes (void)printf("\n"); 8421573Srgrimes for (p = s; *p; p++) 8431573Srgrimes (void)printf("%c", *p & M_PROTECT ? '"' : ' '); 8441573Srgrimes (void)printf("\n"); 8451573Srgrimes for (p = s; *p; p++) 8461573Srgrimes (void)printf("%c", ismeta(*p) ? '_' : ' '); 8471573Srgrimes (void)printf("\n"); 8481573Srgrimes} 8491573Srgrimes#endif 850