From: Ben Gras Date: Tue, 8 Apr 2008 13:14:33 +0000 (+0000) Subject: A glob() implementation. X-Git-Tag: v3.1.4~236 X-Git-Url: http://zhaoyanbai.com/repos/icons/static/man.3.ps?a=commitdiff_plain;h=39aa2e6489f1383e6d7beaee295883df74336d88;p=minix.git A glob() implementation. --- diff --git a/include/glob.h b/include/glob.h new file mode 100644 index 000000000..f967c05dd --- /dev/null +++ b/include/glob.h @@ -0,0 +1,89 @@ +/* + * 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. + * + * 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. + * + * @(#)glob.h 8.1 (Berkeley) 6/2/93 + */ + +#ifndef _GLOB_H_ +#define _GLOB_H_ + +struct stat; +typedef struct { + int gl_pathc; /* Count of total paths so far. */ + int gl_matchc; /* Count of paths matching pattern. */ + int gl_offs; /* Reserved at beginning of gl_pathv. */ + int gl_flags; /* Copy of flags parameter to glob. */ + char **gl_pathv; /* List of paths matching pattern. */ + /* Copy of errfunc parameter to glob. */ + int (*gl_errfunc)(const char *, int); + + /* + * Alternate filesystem access methods for glob; replacement + * versions of closedir(3), readdir(3), opendir(3), stat(2) + * and lstat(2). + */ + void (*gl_closedir)(void *); + struct dirent *(*gl_readdir)(void *); + void *(*gl_opendir)(const char *); + int (*gl_lstat)(const char *, struct stat *); + int (*gl_stat)(const char *, struct stat *); +} glob_t; + +#define GLOB_APPEND 0x0001 /* Append to output from previous call. */ +#define GLOB_DOOFFS 0x0002 /* Use gl_offs. */ +#define GLOB_ERR 0x0004 /* Return on error. */ +#define GLOB_MARK 0x0008 /* Append / to matching directories. */ +#define GLOB_NOCHECK 0x0010 /* Return pattern itself if nothing matches. */ +#define GLOB_NOSORT 0x0020 /* Don't sort. */ +#define GLOB_NOESCAPE 0x1000 /* Disable backslash escaping. */ + +#define GLOB_NOSPACE (-1) /* Malloc call failed. */ +#define GLOB_ABORTED (-2) /* Unignored error. */ +#define GLOB_NOMATCH (-3) /* No match and GLOB_NOCHECK not set. */ +#define GLOB_NOSYS (-4) /* Function not supported. */ + + +#define GLOB_ALTDIRFUNC 0x0040 /* Use alternately specified directory funcs. */ +#define GLOB_BRACE 0x0080 /* Expand braces ala csh. */ +#define GLOB_MAGCHAR 0x0100 /* Pattern had globbing characters. */ +#define GLOB_NOMAGIC 0x0200 /* GLOB_NOCHECK without magic chars (csh). */ +#define GLOB_QUOTE 0x0400 /* Quote special chars with \. */ +#define GLOB_TILDE 0x0800 /* Expand tilde names from the passwd file. */ +#define GLOB_LIMIT 0x2000 /* Limit pattern match output to ARG_MAX */ +#define GLOB_ABEND GLOB_ABORTED /* backward compatibility */ + + + +int glob(const char *, int, int (*)(const char *, int), glob_t *); +void globfree(glob_t *); + + +#endif /* !_GLOB_H_ */ diff --git a/lib/posix/glob.c b/lib/posix/glob.c new file mode 100644 index 000000000..89725f795 --- /dev/null +++ b/lib/posix/glob.c @@ -0,0 +1,845 @@ +/* + * 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. + * + * 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. + */ + +/* + * 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. + */ + +#include +#include + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define DOLLAR '$' +#define DOT '.' +#define EOS '\0' +#define LBRACKET '[' +#define NOT '!' +#define QUESTION '?' +#define QUOTE '\\' +#define RANGE '-' +#define RBRACKET ']' +#define SEP '/' +#define STAR '*' +#define TILDE '~' +#define UNDERSCORE '_' +#define LBRACE '{' +#define RBRACE '}' +#define SLASH '/' +#define COMMA ',' + +#ifndef DEBUG + +#define M_QUOTE 0x8000 +#define M_PROTECT 0x4000 +#define M_MASK 0xffff +#define M_ASCII 0x00ff + +typedef u_short Char; + +#else + +#define M_QUOTE 0x80 +#define M_PROTECT 0x40 +#define M_MASK 0xff +#define M_ASCII 0x7f + +typedef char Char; + +#endif + + +#define CHAR(c) ((Char)((c)&M_ASCII)) +#define META(c) ((Char)((c)|M_QUOTE)) +#define M_ALL META('*') +#define M_END META(']') +#define M_NOT META('!') +#define M_ONE META('?') +#define M_RNG META('-') +#define M_SET META('[') +#define ismeta(c) (((c)&M_QUOTE) != 0) + +static int compare(const void *, const void *); +static int g_Ctoc(const Char *, char *, u_int); +static int g_lstat(Char *, struct stat *, glob_t *); +static DIR *g_opendir(Char *, glob_t *); +static Char *g_strchr(Char *, int); +static int g_stat(Char *, struct stat *, glob_t *); +static int glob0(const Char *, glob_t *); +static int glob1(Char *, Char *, glob_t *, size_t *); +static int glob2(Char *, Char *, Char *, Char *, Char *, Char *, + glob_t *, size_t *); +static int glob3(Char *, Char *, Char *, Char *, Char *, + Char *, Char *, glob_t *, size_t *); +static int globextend(const Char *, glob_t *, size_t *); +static const Char * + globtilde(const Char *, Char *, size_t, glob_t *); +static int globexp1(const Char *, glob_t *); +static int globexp2(const Char *, const Char *, glob_t *, int *); +static int match(Char *, Char *, Char *); +#ifdef DEBUG +static void qprintf(const char *, Char *); +#endif + +int +glob(const char *pattern, int flags, int (*errfunc)(const char *, int), + glob_t *pglob) +{ + const u_char *patnext; + int c; + Char *bufnext, *bufend, patbuf[PATH_MAX]; + + patnext = (u_char *) pattern; + if (!(flags & GLOB_APPEND)) { + pglob->gl_pathc = 0; + pglob->gl_pathv = NULL; + if (!(flags & GLOB_DOOFFS)) + pglob->gl_offs = 0; + } + pglob->gl_flags = flags & ~GLOB_MAGCHAR; + pglob->gl_errfunc = errfunc; + pglob->gl_matchc = 0; + + bufnext = patbuf; + bufend = bufnext + PATH_MAX - 1; + if (flags & GLOB_NOESCAPE) + while (bufnext < bufend && (c = *patnext++) != EOS) + *bufnext++ = c; + else { + /* Protect the quoted characters. */ + while (bufnext < bufend && (c = *patnext++) != EOS) + if (c == QUOTE) { + if ((c = *patnext++) == EOS) { + c = QUOTE; + --patnext; + } + *bufnext++ = c | M_PROTECT; + } else + *bufnext++ = c; + } + *bufnext = EOS; + + if (flags & GLOB_BRACE) + return globexp1(patbuf, pglob); + else + return glob0(patbuf, pglob); +} + +/* + * 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) +{ + const Char* ptr = pattern; + int rv; + + /* Protect a single {}, for find(1), like csh */ + if (pattern[0] == LBRACE && pattern[1] == RBRACE && pattern[2] == EOS) + return glob0(pattern, pglob); + + while ((ptr = (const Char *) g_strchr((Char *) ptr, LBRACE)) != NULL) + if (!globexp2(ptr, pattern, pglob, &rv)) + return rv; + + return glob0(pattern, pglob); +} + + +/* + * 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, int *rv) +{ + int i; + Char *lm, *ls; + const Char *pe, *pm, *pl; + Char patbuf[PATH_MAX]; + + /* copy part up to the brace */ + for (lm = patbuf, pm = pattern; pm != ptr; *lm++ = *pm++) + ; + *lm = EOS; + ls = lm; + + /* Find the balanced brace */ + for (i = 0, pe = ++ptr; *pe; pe++) + if (*pe == LBRACKET) { + /* Ignore everything between [] */ + for (pm = pe++; *pe != RBRACKET && *pe != EOS; pe++) + ; + 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) { + *rv = glob0(patbuf, pglob); + return 0; + } + + for (i = 0, pl = pm = ptr; pm <= pe; pm++) { + switch (*pm) { + case LBRACKET: + /* Ignore everything between [] */ + for (pl = pm++; *pm != RBRACKET && *pm != EOS; pm++) + ; + if (*pm == EOS) { + /* + * We could not find a matching RBRACKET. + * Ignore and just look for RBRACE + */ + pm = pl; + } + 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++) + ; + + /* + * Append the rest of the pattern after the + * closing brace + */ + for (pl = pe + 1; (*lm++ = *pl++) != EOS; ) + ; + + /* Expand the current pattern */ +#ifdef DEBUG + qprintf("globexp2:", patbuf); +#endif + *rv = globexp1(patbuf, pglob); + + /* move after the comma, to the next string */ + pl = pm + 1; + } + break; + + default: + break; + } + } + *rv = 0; + 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; + const Char *p; + Char *b, *eb; + + 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, h = (char *) patbuf; + h < (char *)eb && *p && *p != SLASH; *h++ = *p++) + ; + + *h = EOS; + +#if 0 + if (h == (char *)eb) + return what; +#endif + + if (((char *) patbuf)[0] == EOS) { + /* + * handle a plain ~ or ~/ by expanding $HOME + * first and then trying the password file + */ + if ((h = getenv("HOME")) == NULL) { + if ((pwd = getpwuid(getuid())) == NULL) + return pattern; + else + h = pwd->pw_dir; + } + } else { + /* + * Expand a ~user + */ + if ((pwd = getpwnam((char*) patbuf)) == NULL) + return pattern; + else + h = pwd->pw_dir; + } + + /* Copy the home directory */ + for (b = patbuf; b < eb && *h; *b++ = *h++) + ; + + /* Append the rest of the pattern */ + while (b < eb && (*b++ = *p++) != EOS) + ; + *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. It is not an error + * to find no matches. + */ +static int +glob0(const Char *pattern, glob_t *pglob) +{ + const Char *qpatnext; + int c, err, oldpathc; + Char *bufnext, patbuf[PATH_MAX]; + size_t limit = 0; + + qpatnext = globtilde(pattern, patbuf, PATH_MAX, pglob); + 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((Char *) 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 avoid exponential behavior + */ + 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, patbuf+PATH_MAX-1, pglob, &limit)) != 0) + return(err); + + /* + * If there was no match we are going to append the pattern + * if GLOB_NOCHECK was specified or if GLOB_NOMAGIC was specified + * and the pattern did not contain any magic characters + * GLOB_NOMAGIC is there just for compatibility with csh. + */ + if (pglob->gl_pathc == oldpathc) { + if ((pglob->gl_flags & GLOB_NOCHECK) || + ((pglob->gl_flags & GLOB_NOMAGIC) && + !(pglob->gl_flags & GLOB_MAGCHAR))) + return(globextend(pattern, pglob, &limit)); + else + return(GLOB_NOMATCH); + } + 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(strcmp(*(char **)p, *(char **)q)); +} + +static int +glob1(Char *pattern, Char *pattern_last, glob_t *pglob, size_t *limitp) +{ + Char pathbuf[PATH_MAX]; + + /* A null pathname is invalid -- POSIX 1003.1 sect. 2.4. */ + if (*pattern == EOS) + return(0); + return(glob2(pathbuf, pathbuf+PATH_MAX-1, + pathbuf, pathbuf+PATH_MAX-1, + pattern, pattern_last, pglob, limitp)); +} + +/* + * 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 *pathbuf_last, Char *pathend, Char *pathend_last, + Char *pattern, Char *pattern_last, glob_t *pglob, size_t *limitp) +{ + 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_MARK) && + 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) + return (1); + *pathend++ = SEP; + *pathend = EOS; + } + ++pglob->gl_matchc; + return(globextend(pathbuf, pglob, limitp)); + } + + /* Find end of next segment, copy tentatively to pathend. */ + q = pathend; + p = pattern; + while (*p != EOS && *p != SEP) { + if (ismeta(*p)) + anymeta = 1; + if (q+1 > pathend_last) + return (1); + *q++ = *p++; + } + + if (!anymeta) { /* No expansion, do next segment. */ + pathend = q; + pattern = p; + while (*pattern == SEP) { + if (pathend+1 > pathend_last) + return (1); + *pathend++ = *pattern++; + } + } else + /* Need expansion, recurse. */ + return(glob3(pathbuf, pathbuf_last, pathend, + pathend_last, pattern, p, pattern_last, + pglob, limitp)); + } + /* NOTREACHED */ +} + +static int +glob3(Char *pathbuf, Char *pathbuf_last, Char *pathend, Char *pathend_last, + Char *pattern, Char *restpattern, Char *restpattern_last, glob_t *pglob, + size_t *limitp) +{ + struct dirent *dp; + DIR *dirp; + int err; + char buf[PATH_MAX]; + + /* + * The readdirfunc declaration can't be prototyped, because it is + * assigned, below, to two functions which are prototyped in glob.h + * and dirent.h as taking pointers to differently typed opaque + * structures. + */ + struct dirent *(*readdirfunc)(void *); + + if (pathend > pathend_last) + return (1); + *pathend = EOS; + errno = 0; + + if ((dirp = g_opendir(pathbuf, pglob)) == NULL) { + /* TODO: don't call for ENOENT or ENOTDIR? */ + if (pglob->gl_errfunc) { + if (g_Ctoc(pathbuf, buf, sizeof(buf))) + return(GLOB_ABORTED); + if (pglob->gl_errfunc(buf, errno) || + pglob->gl_flags & GLOB_ERR) + return(GLOB_ABORTED); + } + return(0); + } + + err = 0; + + /* Search directory for matching names. */ + if (pglob->gl_flags & GLOB_ALTDIRFUNC) + readdirfunc = pglob->gl_readdir; + else + readdirfunc = (struct dirent *(*)(void *))readdir; + while ((dp = (*readdirfunc)(dirp))) { + u_char *sc; + Char *dc; + + /* Initial DOT must be matched literally. */ + if (dp->d_name[0] == DOT && *pattern != DOT) + continue; + dc = pathend; + sc = (u_char *) dp->d_name; + while (dc < pathend_last && (*dc++ = *sc++) != EOS) + ; + if (dc >= pathend_last) { + *dc = EOS; + err = 1; + break; + } + + if (!match(pathend, pattern, restpattern)) { + *pathend = EOS; + continue; + } + err = glob2(pathbuf, pathbuf_last, --dc, pathend_last, + restpattern, restpattern_last, pglob, limitp); + if (err) + break; + } + + if (pglob->gl_flags & GLOB_ALTDIRFUNC) + (*pglob->gl_closedir)(dirp); + else + closedir(dirp); + return(err); +} + + +/* + * 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, size_t *limitp) +{ + char **pathv; + int i; + u_int newsize, len; + char *copy; + const Char *p; + + newsize = sizeof(*pathv) * (2 + pglob->gl_pathc + pglob->gl_offs); + pathv = pglob->gl_pathv ? realloc((char *)pglob->gl_pathv, newsize) : + malloc(newsize); + if (pathv == NULL) { + if (pglob->gl_pathv) { + free(pglob->gl_pathv); + pglob->gl_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; --i >= 0; ) + *--pathv = NULL; + } + pglob->gl_pathv = pathv; + + for (p = path; *p++;) + ; + len = (size_t)(p - path); + *limitp += len; + if ((copy = malloc(len)) != NULL) { + if (g_Ctoc(path, copy, len)) { + free(copy); + return(GLOB_NOSPACE); + } + pathv[pglob->gl_offs + pglob->gl_pathc++] = copy; + } + pathv[pglob->gl_offs + pglob->gl_pathc] = NULL; + + if ((pglob->gl_flags & GLOB_LIMIT) && + newsize + *limitp >= ARG_MAX) { + errno = 0; + return(GLOB_NOSPACE); + } + + return(copy == NULL ? GLOB_NOSPACE : 0); +} + + +/* + * pattern matching function for filenames. Each occurrence of the * + * pattern causes a recursion level. + */ +static int +match(Char *name, Char *pat, Char *patend) +{ + int ok, negate_range; + Char c, k; + + while (pat < patend) { + c = *pat++; + switch (c & M_MASK) { + case M_ALL: + if (pat == patend) + return(1); + do { + if (match(name, pat, patend)) + return(1); + } while (*name++ != EOS); + return(0); + case M_ONE: + if (*name++ == EOS) + return(0); + break; + case M_SET: + ok = 0; + if ((k = *name++) == EOS) + return(0); + if ((negate_range = ((*pat & M_MASK) == M_NOT)) != EOS) + ++pat; + while (((c = *pat++) & M_MASK) != M_END) + if ((*pat & M_MASK) == M_RNG) { + if (c <= k && k <= pat[1]) + ok = 1; + pat += 2; + } else if (c == k) + ok = 1; + if (ok == negate_range) + return(0); + break; + default: + if (*name++ != c) + return(0); + break; + } + } + return(*name == EOS); +} + +/* Free allocated data belonging to a glob_t structure. */ +void +globfree(glob_t *pglob) +{ + int 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[PATH_MAX]; + + if (!*str) + strlcpy(buf, ".", sizeof buf); + else { + if (g_Ctoc(str, buf, sizeof(buf))) + 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[PATH_MAX]; + + if (g_Ctoc(fn, buf, sizeof(buf))) + 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[PATH_MAX]; + + if (g_Ctoc(fn, buf, sizeof(buf))) + return(-1); + if (pglob->gl_flags & GLOB_ALTDIRFUNC) + return((*pglob->gl_stat)(buf, sb)); + return(stat(buf, sb)); +} + +static Char * +g_strchr(Char *str, int ch) +{ + do { + if (*str == ch) + return (str); + } while (*str++); + return (NULL); +} + +static int +g_Ctoc(const Char *str, char *buf, u_int len) +{ + + while (len--) { + if ((*buf++ = *str++) == EOS) + return (0); + } + return (1); +} + +#ifdef DEBUG +static void +qprintf(const char *str, Char *s) +{ + Char *p; + + (void)printf("%s:\n", str); + for (p = s; *p; p++) + (void)printf("%c", CHAR(*p)); + (void)printf("\n"); + for (p = s; *p; p++) + (void)printf("%c", *p & M_PROTECT ? '"' : ' '); + (void)printf("\n"); + for (p = s; *p; p++) + (void)printf("%c", ismeta(*p) ? '_' : ' '); + (void)printf("\n"); +} +#endif