| /* |
| * Copyright (c) 1989, 1993 |
| * The Regents of the University of California. All rights reserved. |
| * |
| * This code is derived from software contributed to Berkeley by |
| * Guido van Rossum. |
| * |
| * Copyright (c) 2011 The FreeBSD Foundation |
| * All rights reserved. |
| * Portions of this software were developed by David Chisnall |
| * under sponsorship from the FreeBSD Foundation. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 3. Neither the name of the University nor the names of its contributors |
| * may be used to endorse or promote products derived from this software |
| * without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| */ |
| |
| #if defined(LIBC_SCCS) && !defined(lint) |
| static char sccsid[] = "@(#)glob.c 8.3 (Berkeley) 10/13/93"; |
| #endif /* LIBC_SCCS and not lint */ |
| #include <sys/cdefs.h> |
| __FBSDID("$FreeBSD: head/lib/libc/gen/glob.c 317913 2017-05-07 19:52:56Z jilles $"); |
| |
| /* |
| * glob(3) -- a superset of the one defined in POSIX 1003.2. |
| * |
| * The [!...] convention to negate a range is supported (SysV, Posix, ksh). |
| * |
| * Optional extra services, controlled by flags not defined by POSIX: |
| * |
| * GLOB_QUOTE: |
| * Escaping convention: \ inhibits any special meaning the following |
| * character might have (except \ at end of string is retained). |
| * GLOB_MAGCHAR: |
| * Set in gl_flags if pattern contained a globbing character. |
| * GLOB_NOMAGIC: |
| * Same as GLOB_NOCHECK, but it will only append pattern if it did |
| * not contain any magic characters. [Used in csh style globbing] |
| * GLOB_ALTDIRFUNC: |
| * Use alternately specified directory access functions. |
| * GLOB_TILDE: |
| * expand ~user/foo to the /home/dir/of/user/foo |
| * GLOB_BRACE: |
| * expand {1,2}{a,b} to 1a 1b 2a 2b |
| * gl_matchc: |
| * Number of matches in the current invocation of glob. |
| */ |
| |
| /* |
| * Some notes on multibyte character support: |
| * 1. Patterns with illegal byte sequences match nothing - even if |
| * GLOB_NOCHECK is specified. |
| * 2. Illegal byte sequences in filenames are handled by treating them as |
| * single-byte characters with a values of such bytes of the sequence |
| * cast to wchar_t. |
| * 3. State-dependent encodings are not currently supported. |
| */ |
| |
| #include <sys/param.h> |
| #include <sys/stat.h> |
| |
| #include <ctype.h> |
| #include <dirent.h> |
| #include <errno.h> |
| #include <glob.h> |
| #include <limits.h> |
| #include <pwd.h> |
| #include <stdint.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <unistd.h> |
| #include <wchar.h> |
| |
| #include "collate.h" |
| |
| /* |
| * glob(3) expansion limits. Stop the expansion if any of these limits |
| * is reached. This caps the runtime in the face of DoS attacks. See |
| * also CVE-2010-2632 |
| */ |
| #define GLOB_LIMIT_BRACE 128 /* number of brace calls */ |
| #define GLOB_LIMIT_PATH 65536 /* number of path elements */ |
| #define GLOB_LIMIT_READDIR 16384 /* number of readdirs */ |
| #define GLOB_LIMIT_STAT 1024 /* number of stat system calls */ |
| #define GLOB_LIMIT_STRING ARG_MAX /* maximum total size for paths */ |
| |
| struct glob_limit { |
| size_t l_brace_cnt; |
| size_t l_path_lim; |
| size_t l_readdir_cnt; |
| size_t l_stat_cnt; |
| size_t l_string_cnt; |
| }; |
| |
| #define DOT L'.' |
| #define EOS L'\0' |
| #define LBRACKET L'[' |
| #define NOT L'!' |
| #define QUESTION L'?' |
| #define QUOTE L'\\' |
| #define RANGE L'-' |
| #define RBRACKET L']' |
| #define SEP L'/' |
| #define STAR L'*' |
| #define TILDE L'~' |
| #define LBRACE L'{' |
| #define RBRACE L'}' |
| #define COMMA L',' |
| |
| #define M_QUOTE 0x8000000000ULL |
| #define M_PROTECT 0x4000000000ULL |
| #define M_MASK 0xffffffffffULL |
| #define M_CHAR 0x00ffffffffULL |
| |
| typedef uint_fast64_t Char; |
| |
| #define CHAR(c) ((Char)((c)&M_CHAR)) |
| #define META(c) ((Char)((c)|M_QUOTE)) |
| #define UNPROT(c) ((c) & ~M_PROTECT) |
| #define M_ALL META(L'*') |
| #define M_END META(L']') |
| #define M_NOT META(L'!') |
| #define M_ONE META(L'?') |
| #define M_RNG META(L'-') |
| #define M_SET META(L'[') |
| #define ismeta(c) (((c)&M_QUOTE) != 0) |
| #ifdef DEBUG |
| #define isprot(c) (((c)&M_PROTECT) != 0) |
| #endif |
| |
| static int compare(const void *, const void *); |
| static int g_Ctoc(const Char *, char *, size_t); |
| static int g_lstat(Char *, struct stat *, glob_t *); |
| static DIR *g_opendir(Char *, glob_t *); |
| static const Char *g_strchr(const Char *, wchar_t); |
| #ifdef notdef |
| static Char *g_strcat(Char *, const Char *); |
| #endif |
| static int g_stat(Char *, struct stat *, glob_t *); |
| static int glob0(const Char *, glob_t *, struct glob_limit *, |
| const char *); |
| static int glob1(Char *, glob_t *, struct glob_limit *); |
| static int glob2(Char *, Char *, Char *, Char *, glob_t *, |
| struct glob_limit *); |
| static int glob3(Char *, Char *, Char *, Char *, Char *, glob_t *, |
| struct glob_limit *); |
| static int globextend(const Char *, glob_t *, struct glob_limit *, |
| const char *); |
| static const Char * |
| globtilde(const Char *, Char *, size_t, glob_t *); |
| static int globexp0(const Char *, glob_t *, struct glob_limit *, |
| const char *); |
| static int globexp1(const Char *, glob_t *, struct glob_limit *); |
| static int globexp2(const Char *, const Char *, glob_t *, |
| struct glob_limit *); |
| static int globfinal(glob_t *, struct glob_limit *, size_t, |
| const char *); |
| static int match(Char *, Char *, Char *); |
| static int err_nomatch(glob_t *, struct glob_limit *, const char *); |
| static int err_aborted(glob_t *, int, char *); |
| #ifdef DEBUG |
| static void qprintf(const char *, Char *); |
| #endif |
| |
| int |
| glob(const char * __restrict pattern, int flags, |
| int (*errfunc)(const char *, int), glob_t * __restrict pglob) |
| { |
| struct glob_limit limit = { 0, 0, 0, 0, 0 }; |
| const char *patnext; |
| Char *bufnext, *bufend, patbuf[MAXPATHLEN], prot; |
| mbstate_t mbs; |
| wchar_t wc; |
| size_t clen; |
| int too_long; |
| |
| patnext = pattern; |
| if (!(flags & GLOB_APPEND)) { |
| pglob->gl_pathc = 0; |
| pglob->gl_pathv = NULL; |
| if (!(flags & GLOB_DOOFFS)) |
| pglob->gl_offs = 0; |
| } |
| if (flags & GLOB_LIMIT) { |
| limit.l_path_lim = pglob->gl_matchc; |
| if (limit.l_path_lim == 0) |
| limit.l_path_lim = GLOB_LIMIT_PATH; |
| } |
| pglob->gl_flags = flags & ~GLOB_MAGCHAR; |
| pglob->gl_errfunc = errfunc; |
| pglob->gl_matchc = 0; |
| |
| bufnext = patbuf; |
| bufend = bufnext + MAXPATHLEN - 1; |
| too_long = 1; |
| if (flags & GLOB_NOESCAPE) { |
| memset(&mbs, 0, sizeof(mbs)); |
| while (bufnext <= bufend) { |
| clen = mbrtowc(&wc, patnext, MB_LEN_MAX, &mbs); |
| if (clen == (size_t)-1 || clen == (size_t)-2) |
| return (err_nomatch(pglob, &limit, pattern)); |
| else if (clen == 0) { |
| too_long = 0; |
| break; |
| } |
| *bufnext++ = wc; |
| patnext += clen; |
| } |
| } else { |
| /* Protect the quoted characters. */ |
| memset(&mbs, 0, sizeof(mbs)); |
| while (bufnext <= bufend) { |
| if (*patnext == '\\') { |
| if (*++patnext == '\0') { |
| *bufnext++ = QUOTE; |
| continue; |
| } |
| prot = M_PROTECT; |
| } else |
| prot = 0; |
| clen = mbrtowc(&wc, patnext, MB_LEN_MAX, &mbs); |
| if (clen == (size_t)-1 || clen == (size_t)-2) |
| return (err_nomatch(pglob, &limit, pattern)); |
| else if (clen == 0) { |
| too_long = 0; |
| break; |
| } |
| *bufnext++ = wc | prot; |
| patnext += clen; |
| } |
| } |
| if (too_long) |
| return (err_nomatch(pglob, &limit, pattern)); |
| *bufnext = EOS; |
| |
| if (flags & GLOB_BRACE) |
| return (globexp0(patbuf, pglob, &limit, pattern)); |
| else |
| return (glob0(patbuf, pglob, &limit, pattern)); |
| } |
| |
| static int |
| globexp0(const Char *pattern, glob_t *pglob, struct glob_limit *limit, |
| const char *origpat) { |
| int rv; |
| size_t oldpathc; |
| |
| /* Protect a single {}, for find(1), like csh */ |
| if (pattern[0] == LBRACE && pattern[1] == RBRACE && pattern[2] == EOS) { |
| if ((pglob->gl_flags & GLOB_LIMIT) && |
| limit->l_brace_cnt++ >= GLOB_LIMIT_BRACE) { |
| errno = E2BIG; |
| return (GLOB_NOSPACE); |
| } |
| return (glob0(pattern, pglob, limit, origpat)); |
| } |
| |
| oldpathc = pglob->gl_pathc; |
| |
| if ((rv = globexp1(pattern, pglob, limit)) != 0) |
| return rv; |
| |
| return (globfinal(pglob, limit, oldpathc, origpat)); |
| } |
| |
| /* |
| * Expand recursively a glob {} pattern. When there is no more expansion |
| * invoke the standard globbing routine to glob the rest of the magic |
| * characters |
| */ |
| static int |
| globexp1(const Char *pattern, glob_t *pglob, struct glob_limit *limit) |
| { |
| const Char* ptr; |
| |
| if ((ptr = g_strchr(pattern, LBRACE)) != NULL) { |
| if ((pglob->gl_flags & GLOB_LIMIT) && |
| limit->l_brace_cnt++ >= GLOB_LIMIT_BRACE) { |
| errno = E2BIG; |
| return (GLOB_NOSPACE); |
| } |
| return (globexp2(ptr, pattern, pglob, limit)); |
| } |
| |
| return (glob0(pattern, pglob, limit, NULL)); |
| } |
| |
| |
| /* |
| * Recursive brace globbing helper. Tries to expand a single brace. |
| * If it succeeds then it invokes globexp1 with the new pattern. |
| * If it fails then it tries to glob the rest of the pattern and returns. |
| */ |
| static int |
| globexp2(const Char *ptr, const Char *pattern, glob_t *pglob, |
| struct glob_limit *limit) |
| { |
| int i, rv; |
| Char *lm, *ls; |
| const Char *pe, *pm, *pm1, *pl; |
| Char patbuf[MAXPATHLEN]; |
| |
| /* copy part up to the brace */ |
| for (lm = patbuf, pm = pattern; pm != ptr; *lm++ = *pm++) |
| continue; |
| *lm = EOS; |
| ls = lm; |
| |
| /* Find the balanced brace */ |
| for (i = 0, pe = ++ptr; *pe != EOS; pe++) |
| if (*pe == LBRACKET) { |
| /* Ignore everything between [] */ |
| for (pm = pe++; *pe != RBRACKET && *pe != EOS; pe++) |
| continue; |
| if (*pe == EOS) { |
| /* |
| * We could not find a matching RBRACKET. |
| * Ignore and just look for RBRACE |
| */ |
| pe = pm; |
| } |
| } |
| else if (*pe == LBRACE) |
| i++; |
| else if (*pe == RBRACE) { |
| if (i == 0) |
| break; |
| i--; |
| } |
| |
| /* Non matching braces; just glob the pattern */ |
| if (i != 0 || *pe == EOS) |
| return (glob0(pattern, pglob, limit, NULL)); |
| |
| for (i = 0, pl = pm = ptr; pm <= pe; pm++) |
| switch (*pm) { |
| case LBRACKET: |
| /* Ignore everything between [] */ |
| for (pm1 = pm++; *pm != RBRACKET && *pm != EOS; pm++) |
| continue; |
| if (*pm == EOS) { |
| /* |
| * We could not find a matching RBRACKET. |
| * Ignore and just look for RBRACE |
| */ |
| pm = pm1; |
| } |
| break; |
| |
| case LBRACE: |
| i++; |
| break; |
| |
| case RBRACE: |
| if (i) { |
| i--; |
| break; |
| } |
| /* FALLTHROUGH */ |
| case COMMA: |
| if (i && *pm == COMMA) |
| break; |
| else { |
| /* Append the current string */ |
| for (lm = ls; (pl < pm); *lm++ = *pl++) |
| continue; |
| /* |
| * Append the rest of the pattern after the |
| * closing brace |
| */ |
| for (pl = pe + 1; (*lm++ = *pl++) != EOS;) |
| continue; |
| |
| /* Expand the current pattern */ |
| #ifdef DEBUG |
| qprintf("globexp2:", patbuf); |
| #endif |
| rv = globexp1(patbuf, pglob, limit); |
| if (rv) |
| return (rv); |
| |
| /* move after the comma, to the next string */ |
| pl = pm + 1; |
| } |
| break; |
| |
| default: |
| break; |
| } |
| return (0); |
| } |
| |
| |
| |
| /* |
| * expand tilde from the passwd file. |
| */ |
| static const Char * |
| globtilde(const Char *pattern, Char *patbuf, size_t patbuf_len, glob_t *pglob) |
| { |
| struct passwd *pwd; |
| char *h, *sc; |
| const Char *p; |
| Char *b, *eb; |
| wchar_t wc; |
| wchar_t wbuf[MAXPATHLEN]; |
| wchar_t *wbufend, *dc; |
| size_t clen; |
| mbstate_t mbs; |
| int too_long; |
| |
| if (*pattern != TILDE || !(pglob->gl_flags & GLOB_TILDE)) |
| return (pattern); |
| |
| /* |
| * Copy up to the end of the string or / |
| */ |
| eb = &patbuf[patbuf_len - 1]; |
| for (p = pattern + 1, b = patbuf; |
| b < eb && *p != EOS && UNPROT(*p) != SEP; *b++ = *p++) |
| continue; |
| |
| if (*p != EOS && UNPROT(*p) != SEP) |
| return (NULL); |
| |
| *b = EOS; |
| h = NULL; |
| |
| if (patbuf[0] == EOS) { |
| /* |
| * handle a plain ~ or ~/ by expanding $HOME first (iff |
| * we're not running setuid or setgid) and then trying |
| * the password file |
| */ |
| if (issetugid() != 0 || |
| (h = getenv("HOME")) == NULL) { |
| if (((h = getlogin()) != NULL && |
| (pwd = getpwnam(h)) != NULL) || |
| (pwd = getpwuid(getuid())) != NULL) |
| h = pwd->pw_dir; |
| else |
| return (pattern); |
| } |
| } |
| else { |
| /* |
| * Expand a ~user |
| */ |
| if (g_Ctoc(patbuf, (char *)wbuf, sizeof(wbuf))) |
| return (NULL); |
| if ((pwd = getpwnam((char *)wbuf)) == NULL) |
| return (pattern); |
| else |
| h = pwd->pw_dir; |
| } |
| |
| /* Copy the home directory */ |
| dc = wbuf; |
| sc = h; |
| wbufend = wbuf + MAXPATHLEN - 1; |
| too_long = 1; |
| memset(&mbs, 0, sizeof(mbs)); |
| while (dc <= wbufend) { |
| clen = mbrtowc(&wc, sc, MB_LEN_MAX, &mbs); |
| if (clen == (size_t)-1 || clen == (size_t)-2) { |
| /* XXX See initial comment #2. */ |
| wc = (unsigned char)*sc; |
| clen = 1; |
| memset(&mbs, 0, sizeof(mbs)); |
| } |
| if ((*dc++ = wc) == EOS) { |
| too_long = 0; |
| break; |
| } |
| sc += clen; |
| } |
| if (too_long) |
| return (NULL); |
| |
| dc = wbuf; |
| for (b = patbuf; b < eb && *dc != EOS; *b++ = *dc++ | M_PROTECT) |
| continue; |
| if (*dc != EOS) |
| return (NULL); |
| |
| /* Append the rest of the pattern */ |
| if (*p != EOS) { |
| too_long = 1; |
| while (b <= eb) { |
| if ((*b++ = *p++) == EOS) { |
| too_long = 0; |
| break; |
| } |
| } |
| if (too_long) |
| return (NULL); |
| } else |
| *b = EOS; |
| |
| return (patbuf); |
| } |
| |
| |
| /* |
| * The main glob() routine: compiles the pattern (optionally processing |
| * quotes), calls glob1() to do the real pattern matching, and finally |
| * sorts the list (unless unsorted operation is requested). Returns 0 |
| * if things went well, nonzero if errors occurred. |
| */ |
| static int |
| glob0(const Char *pattern, glob_t *pglob, struct glob_limit *limit, |
| const char *origpat) { |
| const Char *qpatnext; |
| int err; |
| size_t oldpathc; |
| Char *bufnext, c, patbuf[MAXPATHLEN]; |
| |
| qpatnext = globtilde(pattern, patbuf, MAXPATHLEN, pglob); |
| if (qpatnext == NULL) { |
| errno = E2BIG; |
| return (GLOB_NOSPACE); |
| } |
| oldpathc = pglob->gl_pathc; |
| bufnext = patbuf; |
| |
| /* We don't need to check for buffer overflow any more. */ |
| while ((c = *qpatnext++) != EOS) { |
| switch (c) { |
| case LBRACKET: |
| c = *qpatnext; |
| if (c == NOT) |
| ++qpatnext; |
| if (*qpatnext == EOS || |
| g_strchr(qpatnext+1, RBRACKET) == NULL) { |
| *bufnext++ = LBRACKET; |
| if (c == NOT) |
| --qpatnext; |
| break; |
| } |
| *bufnext++ = M_SET; |
| if (c == NOT) |
| *bufnext++ = M_NOT; |
| c = *qpatnext++; |
| do { |
| *bufnext++ = CHAR(c); |
| if (*qpatnext == RANGE && |
| (c = qpatnext[1]) != RBRACKET) { |
| *bufnext++ = M_RNG; |
| *bufnext++ = CHAR(c); |
| qpatnext += 2; |
| } |
| } while ((c = *qpatnext++) != RBRACKET); |
| pglob->gl_flags |= GLOB_MAGCHAR; |
| *bufnext++ = M_END; |
| break; |
| case QUESTION: |
| pglob->gl_flags |= GLOB_MAGCHAR; |
| *bufnext++ = M_ONE; |
| break; |
| case STAR: |
| pglob->gl_flags |= GLOB_MAGCHAR; |
| /* collapse adjacent stars to one, |
| * to ensure "**" at the end continues to match the |
| * empty string |
| */ |
| if (bufnext == patbuf || bufnext[-1] != M_ALL) |
| *bufnext++ = M_ALL; |
| break; |
| default: |
| *bufnext++ = CHAR(c); |
| break; |
| } |
| } |
| *bufnext = EOS; |
| #ifdef DEBUG |
| qprintf("glob0:", patbuf); |
| #endif |
| |
| if ((err = glob1(patbuf, pglob, limit)) != 0) |
| return(err); |
| |
| if (origpat != NULL) |
| return (globfinal(pglob, limit, oldpathc, origpat)); |
| |
| return (0); |
| } |
| |
| static int |
| globfinal(glob_t *pglob, struct glob_limit *limit, size_t oldpathc, |
| const char *origpat) { |
| if (pglob->gl_pathc == oldpathc) |
| return (err_nomatch(pglob, limit, origpat)); |
| |
| if (!(pglob->gl_flags & GLOB_NOSORT)) |
| qsort(pglob->gl_pathv + pglob->gl_offs + oldpathc, |
| pglob->gl_pathc - oldpathc, sizeof(char *), compare); |
| |
| return (0); |
| } |
| |
| static int |
| compare(const void *p, const void *q) |
| { |
| return (strcoll(*(char **)p, *(char **)q)); |
| } |
| |
| static int |
| glob1(Char *pattern, glob_t *pglob, struct glob_limit *limit) |
| { |
| Char pathbuf[MAXPATHLEN]; |
| |
| /* A null pathname is invalid -- POSIX 1003.1 sect. 2.4. */ |
| if (*pattern == EOS) |
| return (0); |
| return (glob2(pathbuf, pathbuf, pathbuf + MAXPATHLEN - 1, |
| pattern, pglob, limit)); |
| } |
| |
| /* |
| * The functions glob2 and glob3 are mutually recursive; there is one level |
| * of recursion for each segment in the pattern that contains one or more |
| * meta characters. |
| */ |
| static int |
| glob2(Char *pathbuf, Char *pathend, Char *pathend_last, Char *pattern, |
| glob_t *pglob, struct glob_limit *limit) |
| { |
| struct stat sb; |
| Char *p, *q; |
| int anymeta; |
| |
| /* |
| * Loop over pattern segments until end of pattern or until |
| * segment with meta character found. |
| */ |
| for (anymeta = 0;;) { |
| if (*pattern == EOS) { /* End of pattern? */ |
| *pathend = EOS; |
| if (g_lstat(pathbuf, &sb, pglob)) |
| return (0); |
| |
| if ((pglob->gl_flags & GLOB_LIMIT) && |
| limit->l_stat_cnt++ >= GLOB_LIMIT_STAT) { |
| errno = E2BIG; |
| return (GLOB_NOSPACE); |
| } |
| if ((pglob->gl_flags & GLOB_MARK) && |
| UNPROT(pathend[-1]) != SEP && |
| (S_ISDIR(sb.st_mode) || |
| (S_ISLNK(sb.st_mode) && |
| g_stat(pathbuf, &sb, pglob) == 0 && |
| S_ISDIR(sb.st_mode)))) { |
| if (pathend + 1 > pathend_last) { |
| errno = E2BIG; |
| return (GLOB_NOSPACE); |
| } |
| *pathend++ = SEP; |
| *pathend = EOS; |
| } |
| ++pglob->gl_matchc; |
| return (globextend(pathbuf, pglob, limit, NULL)); |
| } |
| |
| /* Find end of next segment, copy tentatively to pathend. */ |
| q = pathend; |
| p = pattern; |
| while (*p != EOS && UNPROT(*p) != SEP) { |
| if (ismeta(*p)) |
| anymeta = 1; |
| if (q + 1 > pathend_last) { |
| errno = E2BIG; |
| return (GLOB_NOSPACE); |
| } |
| *q++ = *p++; |
| } |
| |
| if (!anymeta) { /* No expansion, do next segment. */ |
| pathend = q; |
| pattern = p; |
| while (UNPROT(*pattern) == SEP) { |
| if (pathend + 1 > pathend_last) { |
| errno = E2BIG; |
| return (GLOB_NOSPACE); |
| } |
| *pathend++ = *pattern++; |
| } |
| } else /* Need expansion, recurse. */ |
| return (glob3(pathbuf, pathend, pathend_last, pattern, |
| p, pglob, limit)); |
| } |
| /* NOTREACHED */ |
| } |
| |
| static int |
| glob3(Char *pathbuf, Char *pathend, Char *pathend_last, |
| Char *pattern, Char *restpattern, |
| glob_t *pglob, struct glob_limit *limit) |
| { |
| struct dirent *dp; |
| DIR *dirp; |
| int err, too_long, saverrno, saverrno2; |
| char buf[MAXPATHLEN + MB_LEN_MAX - 1]; |
| |
| struct dirent *(*readdirfunc)(DIR *); |
| |
| if (pathend > pathend_last) { |
| errno = E2BIG; |
| return (GLOB_NOSPACE); |
| } |
| *pathend = EOS; |
| if (pglob->gl_errfunc != NULL && |
| g_Ctoc(pathbuf, buf, sizeof(buf))) { |
| errno = E2BIG; |
| return (GLOB_NOSPACE); |
| } |
| |
| saverrno = errno; |
| errno = 0; |
| if ((dirp = g_opendir(pathbuf, pglob)) == NULL) { |
| if (errno == ENOENT || errno == ENOTDIR) |
| return (0); |
| err = err_aborted(pglob, errno, buf); |
| if (errno == 0) |
| errno = saverrno; |
| return (err); |
| } |
| |
| err = 0; |
| |
| /* pglob->gl_readdir takes a void *, fix this manually */ |
| if (pglob->gl_flags & GLOB_ALTDIRFUNC) |
| readdirfunc = (struct dirent *(*)(DIR *))pglob->gl_readdir; |
| else |
| readdirfunc = readdir; |
| |
| errno = 0; |
| /* Search directory for matching names. */ |
| while ((dp = (*readdirfunc)(dirp)) != NULL) { |
| char *sc; |
| Char *dc; |
| wchar_t wc; |
| size_t clen; |
| mbstate_t mbs; |
| |
| if ((pglob->gl_flags & GLOB_LIMIT) && |
| limit->l_readdir_cnt++ >= GLOB_LIMIT_READDIR) { |
| errno = E2BIG; |
| err = GLOB_NOSPACE; |
| break; |
| } |
| |
| /* Initial DOT must be matched literally. */ |
| if (dp->d_name[0] == '.' && UNPROT(*pattern) != DOT) { |
| errno = 0; |
| continue; |
| } |
| memset(&mbs, 0, sizeof(mbs)); |
| dc = pathend; |
| sc = dp->d_name; |
| too_long = 1; |
| while (dc <= pathend_last) { |
| clen = mbrtowc(&wc, sc, MB_LEN_MAX, &mbs); |
| if (clen == (size_t)-1 || clen == (size_t)-2) { |
| /* XXX See initial comment #2. */ |
| wc = (unsigned char)*sc; |
| clen = 1; |
| memset(&mbs, 0, sizeof(mbs)); |
| } |
| if ((*dc++ = wc) == EOS) { |
| too_long = 0; |
| break; |
| } |
| sc += clen; |
| } |
| if (too_long && (err = err_aborted(pglob, ENAMETOOLONG, |
| buf))) { |
| errno = ENAMETOOLONG; |
| break; |
| } |
| if (too_long || !match(pathend, pattern, restpattern)) { |
| *pathend = EOS; |
| errno = 0; |
| continue; |
| } |
| if (errno == 0) |
| errno = saverrno; |
| err = glob2(pathbuf, --dc, pathend_last, restpattern, |
| pglob, limit); |
| if (err) |
| break; |
| errno = 0; |
| } |
| |
| saverrno2 = errno; |
| if (pglob->gl_flags & GLOB_ALTDIRFUNC) |
| (*pglob->gl_closedir)(dirp); |
| else |
| closedir(dirp); |
| errno = saverrno2; |
| |
| if (err) |
| return (err); |
| |
| if (dp == NULL && errno != 0 && |
| (err = err_aborted(pglob, errno, buf))) |
| return (err); |
| |
| if (errno == 0) |
| errno = saverrno; |
| return (0); |
| } |
| |
| |
| /* |
| * Extend the gl_pathv member of a glob_t structure to accommodate a new item, |
| * add the new item, and update gl_pathc. |
| * |
| * This assumes the BSD realloc, which only copies the block when its size |
| * crosses a power-of-two boundary; for v7 realloc, this would cause quadratic |
| * behavior. |
| * |
| * Return 0 if new item added, error code if memory couldn't be allocated. |
| * |
| * Invariant of the glob_t structure: |
| * Either gl_pathc is zero and gl_pathv is NULL; or gl_pathc > 0 and |
| * gl_pathv points to (gl_offs + gl_pathc + 1) items. |
| */ |
| static int |
| globextend(const Char *path, glob_t *pglob, struct glob_limit *limit, |
| const char *origpat) |
| { |
| char **pathv; |
| size_t i, newn, len; |
| char *copy; |
| const Char *p; |
| |
| if ((pglob->gl_flags & GLOB_LIMIT) && |
| pglob->gl_matchc > limit->l_path_lim) { |
| errno = E2BIG; |
| return (GLOB_NOSPACE); |
| } |
| |
| newn = 2 + pglob->gl_pathc + pglob->gl_offs; |
| /* reallocarray(NULL, newn, size) is equivalent to malloc(newn*size). */ |
| pathv = reallocarray(pglob->gl_pathv, newn, sizeof(*pathv)); |
| if (pathv == NULL) |
| return (GLOB_NOSPACE); |
| |
| if (pglob->gl_pathv == NULL && pglob->gl_offs > 0) { |
| /* first time around -- clear initial gl_offs items */ |
| pathv += pglob->gl_offs; |
| for (i = pglob->gl_offs + 1; --i > 0; ) |
| *--pathv = NULL; |
| } |
| pglob->gl_pathv = pathv; |
| |
| if (origpat != NULL) |
| copy = strdup(origpat); |
| else { |
| for (p = path; *p++ != EOS;) |
| continue; |
| len = MB_CUR_MAX * (size_t)(p - path); /* XXX overallocation */ |
| if ((copy = malloc(len)) != NULL) { |
| if (g_Ctoc(path, copy, len)) { |
| free(copy); |
| errno = E2BIG; |
| return (GLOB_NOSPACE); |
| } |
| } |
| } |
| if (copy != NULL) { |
| limit->l_string_cnt += strlen(copy) + 1; |
| if ((pglob->gl_flags & GLOB_LIMIT) && |
| limit->l_string_cnt >= GLOB_LIMIT_STRING) { |
| free(copy); |
| errno = E2BIG; |
| return (GLOB_NOSPACE); |
| } |
| pathv[pglob->gl_offs + pglob->gl_pathc++] = copy; |
| } |
| pathv[pglob->gl_offs + pglob->gl_pathc] = NULL; |
| return (copy == NULL ? GLOB_NOSPACE : 0); |
| } |
| |
| /* |
| * pattern matching function for filenames. |
| */ |
| static int |
| match(Char *name, Char *pat, Char *patend) |
| { |
| int ok, negate_range; |
| Char c, k, *nextp, *nextn; |
| #if !defined(__BIONIC__) |
| struct xlocale_collate *table = |
| (struct xlocale_collate*)__get_locale()->components[XLC_COLLATE]; |
| #endif |
| |
| nextn = NULL; |
| nextp = NULL; |
| |
| while (1) { |
| while (pat < patend) { |
| c = *pat++; |
| switch (c & M_MASK) { |
| case M_ALL: |
| if (pat == patend) |
| return (1); |
| if (*name == EOS) |
| return (0); |
| nextn = name + 1; |
| nextp = pat - 1; |
| break; |
| case M_ONE: |
| if (*name++ == EOS) |
| goto fail; |
| break; |
| case M_SET: |
| ok = 0; |
| if ((k = *name++) == EOS) |
| goto fail; |
| negate_range = ((*pat & M_MASK) == M_NOT); |
| if (negate_range != 0) |
| ++pat; |
| while (((c = *pat++) & M_MASK) != M_END) |
| if ((*pat & M_MASK) == M_RNG) { |
| #if defined(__BIONIC__) |
| if (c <= k && k <= pat[1]) |
| #else |
| if (table->__collate_load_error ? |
| CHAR(c) <= CHAR(k) && |
| CHAR(k) <= CHAR(pat[1]) : |
| __wcollate_range_cmp(CHAR(c), |
| CHAR(k)) <= 0 && |
| __wcollate_range_cmp(CHAR(k), |
| CHAR(pat[1])) <= 0) |
| #endif |
| ok = 1; |
| pat += 2; |
| } else if (c == k) |
| ok = 1; |
| if (ok == negate_range) |
| goto fail; |
| break; |
| default: |
| if (*name++ != c) |
| goto fail; |
| break; |
| } |
| } |
| if (*name == EOS) |
| return (1); |
| |
| fail: |
| if (nextn == NULL) |
| break; |
| pat = nextp; |
| name = nextn; |
| } |
| return (0); |
| } |
| |
| /* Free allocated data belonging to a glob_t structure. */ |
| void |
| globfree(glob_t *pglob) |
| { |
| size_t i; |
| char **pp; |
| |
| if (pglob->gl_pathv != NULL) { |
| pp = pglob->gl_pathv + pglob->gl_offs; |
| for (i = pglob->gl_pathc; i--; ++pp) |
| if (*pp) |
| free(*pp); |
| free(pglob->gl_pathv); |
| pglob->gl_pathv = NULL; |
| } |
| } |
| |
| static DIR * |
| g_opendir(Char *str, glob_t *pglob) |
| { |
| char buf[MAXPATHLEN + MB_LEN_MAX - 1]; |
| |
| if (*str == EOS) |
| strcpy(buf, "."); |
| else { |
| if (g_Ctoc(str, buf, sizeof(buf))) { |
| errno = ENAMETOOLONG; |
| return (NULL); |
| } |
| } |
| |
| if (pglob->gl_flags & GLOB_ALTDIRFUNC) |
| return ((*pglob->gl_opendir)(buf)); |
| |
| return (opendir(buf)); |
| } |
| |
| static int |
| g_lstat(Char *fn, struct stat *sb, glob_t *pglob) |
| { |
| char buf[MAXPATHLEN + MB_LEN_MAX - 1]; |
| |
| if (g_Ctoc(fn, buf, sizeof(buf))) { |
| errno = ENAMETOOLONG; |
| return (-1); |
| } |
| if (pglob->gl_flags & GLOB_ALTDIRFUNC) |
| return((*pglob->gl_lstat)(buf, sb)); |
| return (lstat(buf, sb)); |
| } |
| |
| static int |
| g_stat(Char *fn, struct stat *sb, glob_t *pglob) |
| { |
| char buf[MAXPATHLEN + MB_LEN_MAX - 1]; |
| |
| if (g_Ctoc(fn, buf, sizeof(buf))) { |
| errno = ENAMETOOLONG; |
| return (-1); |
| } |
| if (pglob->gl_flags & GLOB_ALTDIRFUNC) |
| return ((*pglob->gl_stat)(buf, sb)); |
| return (stat(buf, sb)); |
| } |
| |
| static const Char * |
| g_strchr(const Char *str, wchar_t ch) |
| { |
| |
| do { |
| if (*str == ch) |
| return (str); |
| } while (*str++); |
| return (NULL); |
| } |
| |
| static int |
| g_Ctoc(const Char *str, char *buf, size_t len) |
| { |
| mbstate_t mbs; |
| size_t clen; |
| |
| memset(&mbs, 0, sizeof(mbs)); |
| while (len >= MB_CUR_MAX) { |
| clen = wcrtomb(buf, CHAR(*str), &mbs); |
| if (clen == (size_t)-1) { |
| /* XXX See initial comment #2. */ |
| *buf = (char)CHAR(*str); |
| clen = 1; |
| memset(&mbs, 0, sizeof(mbs)); |
| } |
| if (CHAR(*str) == EOS) |
| return (0); |
| str++; |
| buf += clen; |
| len -= clen; |
| } |
| return (1); |
| } |
| |
| static int |
| err_nomatch(glob_t *pglob, struct glob_limit *limit, const char *origpat) { |
| /* |
| * If there was no match we are going to append the origpat |
| * if GLOB_NOCHECK was specified or if GLOB_NOMAGIC was specified |
| * and the origpat did not contain any magic characters |
| * GLOB_NOMAGIC is there just for compatibility with csh. |
| */ |
| if ((pglob->gl_flags & GLOB_NOCHECK) || |
| ((pglob->gl_flags & GLOB_NOMAGIC) && |
| !(pglob->gl_flags & GLOB_MAGCHAR))) |
| return (globextend(NULL, pglob, limit, origpat)); |
| return (GLOB_NOMATCH); |
| } |
| |
| static int |
| err_aborted(glob_t *pglob, int err, char *buf) { |
| if ((pglob->gl_errfunc != NULL && pglob->gl_errfunc(buf, err)) || |
| (pglob->gl_flags & GLOB_ERR)) |
| return (GLOB_ABORTED); |
| return (0); |
| } |
| |
| #ifdef DEBUG |
| static void |
| qprintf(const char *str, Char *s) |
| { |
| Char *p; |
| |
| (void)printf("%s\n", str); |
| if (s != NULL) { |
| for (p = s; *p != EOS; p++) |
| (void)printf("%c", (char)CHAR(*p)); |
| (void)printf("\n"); |
| for (p = s; *p != EOS; p++) |
| (void)printf("%c", (isprot(*p) ? '\\' : ' ')); |
| (void)printf("\n"); |
| for (p = s; *p != EOS; p++) |
| (void)printf("%c", (ismeta(*p) ? '_' : ' ')); |
| (void)printf("\n"); |
| } |
| } |
| #endif |