/*
* 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.
*/
#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)glob.c 8.3 (Berkeley) 10/13/93";
/* most changes between the version above and the one below have been ported:
static char sscsid[]= "$OpenBSD: glob.c,v 1.8.10.1 2001/04/10 jason Exp $";
*/
#endif /* LIBC_SCCS and not lint */
/*
* glob(3) -- a superset of the one defined in POSIX 1003.2.
*
* The [!...] convention to negate a range is supported (SysV, Posix, ksh).
*
* Optional extra services, controlled by flags not defined by POSIX:
*
* GLOB_QUOTE:
* Escaping convention: \ inhibits any special meaning the following
* character might have (except \ at end of string is retained).
* GLOB_MAGCHAR:
* Set in gl_flags if pattern contained a globbing character.
* GLOB_NOMAGIC:
* Same as GLOB_NOCHECK, but it will only append pattern if it did
* not contain any magic characters. [Used in csh style globbing]
* GLOB_ALTDIRFUNC:
* Use alternately specified directory access functions.
* GLOB_TILDE:
* expand ~user/foo to the /home/dir/of/user/foo
* GLOB_BRACE:
* expand {1,2}{a,b} to 1a 1b 2a 2b
* gl_matchc:
* Number of matches in the current invocation of glob.
* GLOB_ALPHASORT:
* sort alphabetically like csh (case doesn't matter) instead of in ASCII
* order
*/
#include <EXTERN.h>
#include <perl.h>
#include <XSUB.h>
#include "bsd_glob.h"
#ifdef I_PWD
# include <pwd.h>
#else
#if defined(HAS_PASSWD) && !defined(VMS)
struct passwd *getpwnam(char *);
struct passwd *getpwuid(Uid_t);
#endif
#endif
#ifndef MAXPATHLEN
# ifdef PATH_MAX
# define MAXPATHLEN PATH_MAX
# else
# define MAXPATHLEN 1024
# endif
#endif
#ifdef I_LIMITS
#include <limits.h>
#endif
#ifndef ARG_MAX
# ifdef _SC_ARG_MAX
# define ARG_MAX (sysconf(_SC_ARG_MAX))
# else
# ifdef _POSIX_ARG_MAX
# define ARG_MAX _POSIX_ARG_MAX
# else
# ifdef WIN32
# define ARG_MAX 14500 /* from VC's limits.h */
# else
# define ARG_MAX 4096 /* from POSIX, be conservative */
# endif
# endif
# endif
#endif
#define BG_DOLLAR '$'
#define BG_DOT '.'
#define BG_EOS '\0'
#define BG_LBRACKET '['
#define BG_NOT '!'
#define BG_QUESTION '?'
#define BG_QUOTE '\\'
#define BG_RANGE '-'
#define BG_RBRACKET ']'
#define BG_SEP '/'
#ifdef DOSISH
#define BG_SEP2 '\\'
#endif
#define BG_STAR '*'
#define BG_TILDE '~'
#define BG_UNDERSCORE '_'
#define BG_LBRACE '{'
#define BG_RBRACE '}'
#define BG_SLASH '/'
#define BG_COMMA ','
#ifndef GLOB_DEBUG
#define M_QUOTE 0x8000
#define M_PROTECT 0x4000
#define M_MASK 0xffff
#define M_ASCII 0x00ff
typedef U16 Char;
#else
#define M_QUOTE 0x80
#define M_PROTECT 0x40
#define M_MASK 0xff
#define M_ASCII 0x7f
typedef U8 Char;
#endif /* !GLOB_DEBUG */
#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 ci_compare(const void *, const void *);
static int g_Ctoc(const Char *, char *, STRLEN);
static int g_lstat(Char *, Stat_t *, glob_t *);
static DIR *g_opendir(Char *, glob_t *);
static Char *g_strchr(Char *, int);
static int g_stat(Char *, Stat_t *, 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 *, int);
#ifdef GLOB_DEBUG
static void qprintf(const char *, Char *);
#endif /* GLOB_DEBUG */
#ifdef PERL_IMPLICIT_CONTEXT
static Direntry_t * my_readdir(DIR*);
static Direntry_t *
my_readdir(DIR *d)
{
#ifndef NETWARE
return PerlDir_read(d);
#else
return (DIR *)PerlDir_read(d);
#endif
}
#else
/* ReliantUNIX (OS formerly known as SINIX) defines readdir
* in LFS-mode to be a 64-bit version of readdir. */
# ifdef sinix
static Direntry_t * my_readdir(DIR*);
static Direntry_t *
my_readdir(DIR *d)
{
return readdir(d);
}
# else
# define my_readdir readdir
# endif
#endif
int
bsd_glob(const char *pattern, int flags,
int (*errfunc)(const char *, int), glob_t *pglob)
{
const U8 *patnext;
int c;
Char *bufnext, *bufend, patbuf[MAXPATHLEN];
patnext = (U8 *) pattern;
/* TODO: GLOB_APPEND / GLOB_DOOFFS aren't supported yet */
#if 0
if (!(flags & GLOB_APPEND)) {
pglob->gl_pathc = 0;
pglob->gl_pathv = NULL;
if (!(flags & GLOB_DOOFFS))
pglob->gl_offs = 0;
}
#else
pglob->gl_pathc = 0;
pglob->gl_pathv = NULL;
pglob->gl_offs = 0;
#endif
pglob->gl_flags = flags & ~GLOB_MAGCHAR;
pglob->gl_errfunc = errfunc;
pglob->gl_matchc = 0;
bufnext = patbuf;
bufend = bufnext + MAXPATHLEN - 1;
#ifdef DOSISH
/* Nasty hack to treat patterns like "C:*" correctly. In this
* case, the * should match any file in the current directory
* on the C: drive. However, the glob code does not treat the
* colon specially, so it looks for files beginning "C:" in
* the current directory. To fix this, change the pattern to
* add an explicit "./" at the start (just after the drive
* letter and colon - ie change to "C:./").
*/
if (isalpha(pattern[0]) && pattern[1] == ':' &&
pattern[2] != BG_SEP && pattern[2] != BG_SEP2 &&
bufend - bufnext > 4) {
*bufnext++ = pattern[0];
*bufnext++ = ':';
*bufnext++ = '.';
*bufnext++ = BG_SEP;
patnext += 2;
}
#endif
if (flags & GLOB_QUOTE) {
/* Protect the quoted characters. */
while (bufnext < bufend && (c = *patnext++) != BG_EOS)
if (c == BG_QUOTE) {
#ifdef DOSISH
/* To avoid backslashitis on Win32,
* we only treat \ as a quoting character
* if it precedes one of the
* metacharacters []-{}~\
*/
if ((c = *patnext++) != '[' && c != ']' &&
c != '-' && c != '{' && c != '}' &&
c != '~' && c != '\\') {
#else
if ((c = *patnext++) == BG_EOS) {
#endif
c = BG_QUOTE;
--patnext;
}
*bufnext++ = c | M_PROTECT;
} else
*bufnext++ = c;
} else
while (bufnext < bufend && (c = *patnext++) != BG_EOS)
*bufnext++ = c;
*bufnext = BG_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] == BG_LBRACE && pattern[1] == BG_RBRACE && pattern[2] == BG_EOS)
return glob0(pattern, pglob);
while ((ptr = (const Char *) g_strchr((Char *) ptr, BG_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, *pm1, *pl;
Char patbuf[MAXPATHLEN];
/* copy part up to the brace */
for (lm = patbuf, pm = pattern; pm != ptr; *lm++ = *pm++)
;
*lm = BG_EOS;
ls = lm;
/* Find the balanced brace */
for (i = 0, pe = ++ptr; *pe; pe++)
if (*pe == BG_LBRACKET) {
/* Ignore everything between [] */
for (pm = pe++; *pe != BG_RBRACKET && *pe != BG_EOS; pe++)
;
if (*pe == BG_EOS) {
/*
* We could not find a matching BG_RBRACKET.
* Ignore and just look for BG_RBRACE
*/
pe = pm;
}
} else if (*pe == BG_LBRACE)
i++;
else if (*pe == BG_RBRACE) {
if (i == 0)
break;
i--;
}
/* Non matching braces; just glob the pattern */
if (i != 0 || *pe == BG_EOS) {
*rv = glob0(patbuf, pglob);
return 0;
}
for (i = 0, pl = pm = ptr; pm <= pe; pm++) {
switch (*pm) {
case BG_LBRACKET:
/* Ignore everything between [] */
for (pm1 = pm++; *pm != BG_RBRACKET && *pm != BG_EOS; pm++)
;
if (*pm == BG_EOS) {
/*
* We could not find a matching BG_RBRACKET.
* Ignore and just look for BG_RBRACE
*/
pm = pm1;
}
break;
case BG_LBRACE:
i++;
break;
case BG_RBRACE:
if (i) {
i--;
break;
}
/* FALLTHROUGH */
case BG_COMMA:
if (i && *pm == BG_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++) != BG_EOS; )
;
/* Expand the current pattern */
#ifdef GLOB_DEBUG
qprintf("globexp2:", patbuf);
#endif /* GLOB_DEBUG */
*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)
{
char *h;
const Char *p;
Char *b, *eb;
if (*pattern != BG_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 != BG_SLASH; *h++ = (char)*p++)
;
*h = BG_EOS;
#if 0
if (h == (char *)eb)
return what;
#endif
if (((char *) patbuf)[0] == BG_EOS) {
/*
* handle a plain ~ or ~/ by expanding $HOME
* first and then trying the password file
* or $USERPROFILE on DOSISH systems
*/
if ((h = getenv("HOME")) == NULL) {
#ifdef HAS_PASSWD
struct passwd *pwd;
if ((pwd = getpwuid(getuid())) == NULL)
return pattern;
else
h = pwd->pw_dir;
#elif DOSISH
/*
* When no passwd file, fallback to the USERPROFILE
* environment variable on DOSish systems.
*/
if ((h = getenv("USERPROFILE")) == NULL) {
return pattern;
}
#else
return pattern;
#endif
}
} else {
/*
* Expand a ~user
*/
#ifdef HAS_PASSWD
struct passwd *pwd;
if ((pwd = getpwnam((char*) patbuf)) == NULL)
return pattern;
else
h = pwd->pw_dir;
#else
return pattern;
#endif
}
/* Copy the home directory */
for (b = patbuf; b < eb && *h; *b++ = *h++)
;
/* Append the rest of the pattern */
while (b < eb && (*b++ = *p++) != BG_EOS)
;
*b = BG_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 *qpat, *qpatnext;
int c, err, oldflags, oldpathc;
Char *bufnext, patbuf[MAXPATHLEN];
size_t limit = 0;
qpat = globtilde(pattern, patbuf, MAXPATHLEN, pglob);
qpatnext = qpat;
oldflags = pglob->gl_flags;
oldpathc = pglob->gl_pathc;
bufnext = patbuf;
/* We don't need to check for buffer overflow any more. */
while ((c = *qpatnext++) != BG_EOS) {
switch (c) {
case BG_LBRACKET:
c = *qpatnext;
if (c == BG_NOT)
++qpatnext;
if (*qpatnext == BG_EOS ||
g_strchr((Char *) qpatnext+1, BG_RBRACKET) == NULL) {
*bufnext++ = BG_LBRACKET;
if (c == BG_NOT)
--qpatnext;
break;
}
*bufnext++ = M_SET;
if (c == BG_NOT)
*bufnext++ = M_NOT;
c = *qpatnext++;
do {
*bufnext++ = CHAR(c);
if (*qpatnext == BG_RANGE &&
(c = qpatnext[1]) != BG_RBRACKET) {
*bufnext++ = M_RNG;
*bufnext++ = CHAR(c);
qpatnext += 2;
}
} while ((c = *qpatnext++) != BG_RBRACKET);
pglob->gl_flags |= GLOB_MAGCHAR;
*bufnext++ = M_END;
break;
case BG_QUESTION:
pglob->gl_flags |= GLOB_MAGCHAR;
*bufnext++ = M_ONE;
break;
case BG_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 = BG_EOS;
#ifdef GLOB_DEBUG
qprintf("glob0:", patbuf);
#endif /* GLOB_DEBUG */
if ((err = glob1(patbuf, patbuf+MAXPATHLEN-1, pglob, &limit)) != 0) {
pglob->gl_flags = oldflags;
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 &&
((pglob->gl_flags & GLOB_NOCHECK) ||
((pglob->gl_flags & GLOB_NOMAGIC) &&
!(pglob->gl_flags & GLOB_MAGCHAR))))
{
#ifdef GLOB_DEBUG
printf("calling globextend from glob0\n");
#endif /* GLOB_DEBUG */
pglob->gl_flags = oldflags;
return(globextend(qpat, pglob, &limit));
}
else if (!(pglob->gl_flags & GLOB_NOSORT))
qsort(pglob->gl_pathv + pglob->gl_offs + oldpathc,
pglob->gl_pathc - oldpathc, sizeof(char *),
(pglob->gl_flags & (GLOB_ALPHASORT|GLOB_NOCASE))
? ci_compare : compare);
pglob->gl_flags = oldflags;
return(0);
}
static int
ci_compare(const void *p, const void *q)
{
const char *pp = *(const char **)p;
const char *qq = *(const char **)q;
int ci;
while (*pp && *qq) {
if (toFOLD(*pp) != toFOLD(*qq))
break;
++pp;
++qq;
}
ci = toFOLD(*pp) - toFOLD(*qq);
if (ci == 0)
return compare(p, q);
return ci;
}
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[MAXPATHLEN];
assert(pattern < pattern_last);
/* A null pathname is invalid -- POSIX 1003.1 sect. 2.4. */
if (*pattern == BG_EOS)
return(0);
return(glob2(pathbuf, pathbuf+MAXPATHLEN-1,
pathbuf, pathbuf+MAXPATHLEN-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)
{
Stat_t sb;
Char *p, *q;
int anymeta;
assert(pattern < pattern_last);
/*
* Loop over pattern segments until end of pattern or until
* segment with meta character found.
*/
for (anymeta = 0;;) {
if (*pattern == BG_EOS) { /* End of pattern? */
*pathend = BG_EOS;
if (g_lstat(pathbuf, &sb, pglob))
return(0);
if (((pglob->gl_flags & GLOB_MARK) &&
pathend[-1] != BG_SEP
#ifdef DOSISH
&& pathend[-1] != BG_SEP2
#endif
) && (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++ = BG_SEP;
*pathend = BG_EOS;
}
++pglob->gl_matchc;
#ifdef GLOB_DEBUG
printf("calling globextend from glob2\n");
#endif /* GLOB_DEBUG */
return(globextend(pathbuf, pglob, limitp));
}
/* Find end of next segment, copy tentatively to pathend. */
q = pathend;
p = pattern;
while (*p != BG_EOS && *p != BG_SEP
#ifdef DOSISH
&& *p != BG_SEP2
#endif
) {
assert(p < pattern_last);
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 == BG_SEP
#ifdef DOSISH
|| *pattern == BG_SEP2
#endif
) {
assert(p < pattern_last);
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)
{
Direntry_t *dp;
DIR *dirp;
int err;
int nocase;
char buf[MAXPATHLEN];
/*
* 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.
*/
Direntry_t *(*readdirfunc)(DIR*);
assert(pattern < restpattern_last);
assert(restpattern < restpattern_last);
if (pathend > pathend_last)
return (1);
*pathend = BG_EOS;
errno = 0;
#ifdef VMS
{
Char *q = pathend;
if (q - pathbuf > 5) {
q -= 5;
if (q[0] == '.' &&
tolower(q[1]) == 'd' && tolower(q[2]) == 'i' &&
tolower(q[3]) == 'r' && q[4] == '/')
{
q[0] = '/';
q[1] = BG_EOS;
pathend = q+1;
}
}
}
#endif
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_ABEND);
if (pglob->gl_errfunc(buf, errno) ||
(pglob->gl_flags & GLOB_ERR))
return (GLOB_ABEND);
}
return(0);
}
err = 0;
nocase = ((pglob->gl_flags & GLOB_NOCASE) != 0);
/* Search directory for matching names. */
if (pglob->gl_flags & GLOB_ALTDIRFUNC)
readdirfunc = (Direntry_t *(*)(DIR *))pglob->gl_readdir;
else
readdirfunc = (Direntry_t *(*)(DIR *))my_readdir;
while ((dp = (*readdirfunc)(dirp))) {
U8 *sc;
Char *dc;
/* Initial BG_DOT must be matched literally. */
if (dp->d_name[0] == BG_DOT && *pattern != BG_DOT)
continue;
dc = pathend;
sc = (U8 *) dp->d_name;
while (dc < pathend_last && (*dc++ = *sc++) != BG_EOS)
;
if (dc >= pathend_last) {
*dc = BG_EOS;
err = 1;
break;
}
if (!match(pathend, pattern, restpattern, nocase)) {
*pathend = BG_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
PerlDir_close(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;
STRLEN newsize, len;
char *copy;
const Char *p;
#ifdef GLOB_DEBUG
printf("Adding ");
for (p = path; *p; p++)
(void)printf("%c", CHAR(*p));
printf("\n");
#endif /* GLOB_DEBUG */
newsize = sizeof(*pathv) * (2 + pglob->gl_pathc + pglob->gl_offs);
if (pglob->gl_pathv)
pathv = Renew(pglob->gl_pathv,newsize,char*);
else
Newx(pathv,newsize,char*);
if (pathv == NULL) {
if (pglob->gl_pathv) {
Safefree(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 = (STRLEN)(p - path);
*limitp += len;
Newx(copy, p-path, char);
if (copy != NULL) {
if (g_Ctoc(path, copy, len)) {
Safefree(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 >= (unsigned long)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 nocase)
{
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, nocase))
return(1);
while (*name++ != BG_EOS)
;
return(0);
case M_ONE:
if (*name++ == BG_EOS)
return(0);
break;
case M_SET:
ok = 0;
if ((k = *name++) == BG_EOS)
return(0);
if ((negate_range = ((*pat & M_MASK) == M_NOT)) != BG_EOS)
++pat;
while (((c = *pat++) & M_MASK) != M_END)
if ((*pat & M_MASK) == M_RNG) {
if (nocase) {
if (tolower(c) <= tolower(k) && tolower(k) <= tolower(pat[1]))
ok = 1;
} else {
if (c <= k && k <= pat[1])
ok = 1;
}
pat += 2;
} else if (nocase ? (tolower(c) == tolower(k)) : (c == k))
ok = 1;
if (ok == negate_range)
return(0);
break;
default:
k = *name++;
if (nocase ? (tolower(k) != tolower(c)) : (k != c))
return(0);
break;
}
}
return(*name == BG_EOS);
}
/* Free allocated data belonging to a glob_t structure. */
void
bsd_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)
Safefree(*pp);
Safefree(pglob->gl_pathv);
pglob->gl_pathv = NULL;
}
}
static DIR *
g_opendir(Char *str, glob_t *pglob)
{
char buf[MAXPATHLEN];
if (!*str) {
my_strlcpy(buf, ".", sizeof(buf));
} else {
if (g_Ctoc(str, buf, sizeof(buf)))
return(NULL);
}
if (pglob->gl_flags & GLOB_ALTDIRFUNC)
return((DIR*)(*pglob->gl_opendir)(buf));
return(PerlDir_open(buf));
}
static int
g_lstat(Char *fn, Stat_t *sb, glob_t *pglob)
{
char buf[MAXPATHLEN];
if (g_Ctoc(fn, buf, sizeof(buf)))
return(-1);
if (pglob->gl_flags & GLOB_ALTDIRFUNC)
return((*pglob->gl_lstat)(buf, sb));
#ifdef HAS_LSTAT
return(PerlLIO_lstat(buf, sb));
#else
return(PerlLIO_stat(buf, sb));
#endif /* HAS_LSTAT */
}
static int
g_stat(Char *fn, Stat_t *sb, glob_t *pglob)
{
char buf[MAXPATHLEN];
if (g_Ctoc(fn, buf, sizeof(buf)))
return(-1);
if (pglob->gl_flags & GLOB_ALTDIRFUNC)
return((*pglob->gl_stat)(buf, sb));
return(PerlLIO_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, STRLEN len)
{
while (len--) {
if ((*buf++ = (char)*str++) == BG_EOS)
return (0);
}
return (1);
}
#ifdef GLOB_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 /* GLOB_DEBUG */