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* posix/glob.c: Reimplement link_exists_p to use fstatat64.

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This commit is contained in:
Ulrich Drepper 2007-10-15 04:59:16 +00:00
parent 1b6aa63f4e
commit 8d97ac1355
2 changed files with 30 additions and 3 deletions
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2
ChangeLog
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@ -1,5 +1,7 @@
2007-10-14 Ulrich Drepper <drepper@redhat.com>
* posix/glob.c: Reimplement link_exists_p to use fstatat64.
* posix/glob.c: Add some branch prediction throughout.
* nscd/nscd_getgr_r.c (nscd_getgr_r): Store result of successful

31
posix/glob.c
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@ -1222,21 +1222,42 @@ weak_alias (__glob_pattern_p, glob_pattern_p)
allocated with alloca to be recycled. */
#if !defined _LIBC || !defined GLOB_ONLY_P
static int
link_exists_p (const char *dir, size_t dirlen, const char *fname,
glob_t *pglob, int flags)
__attribute_noinline__
link_exists2_p (const char *dir, size_t dirlen, const char *fname,
glob_t *pglob
# ifndef _LIBC
, int flags
# endif
)
{
size_t fnamelen = strlen (fname);
char *fullname = (char *) __alloca (dirlen + 1 + fnamelen + 1);
struct stat st;
# ifndef _LIBC
struct_stat64 st64;
# endif
mempcpy (mempcpy (mempcpy (fullname, dir, dirlen), "/", 1),
fname, fnamelen + 1);
# ifdef _LIBC
return (*pglob->gl_stat) (fullname, &st) == 0;
# else
return ((__builtin_expect (flags & GLOB_ALTDIRFUNC, 0)
? (*pglob->gl_stat) (fullname, &st)
: __stat64 (fullname, &st64)) == 0);
# endif
}
# ifdef _LIBC
# define link_exists_p(dfd, dirname, dirnamelen, fname, pglob, flags) \
(__builtin_expect (flags & GLOB_ALTDIRFUNC, 0) \
? link_exists2_p (dirname, dirnamelen, fname, pglob) \
: ({ struct stat64 st64; \
__fxstatat64 (_STAT_VER, dfd, fname, &st64, 0) == 0; }))
# else
# define link_exists_p(dfd, dirname, dirnamelen, fname, pglob, flags) \
link_exists2_p (dirname, dirnamelen, fname, pglob, flags)
# endif
#endif
@ -1311,6 +1332,10 @@ glob_in_dir (const char *pattern, const char *directory, int flags,
}
else
{
#ifdef _LIBC
int dfd = (__builtin_expect (flags & GLOB_ALTDIRFUNC, 0)
? -1 : dirfd ((DIR *) stream));
#endif
int fnm_flags = ((!(flags & GLOB_PERIOD) ? FNM_PERIOD : 0)
| ((flags & GLOB_NOESCAPE) ? FNM_NOESCAPE : 0)
#if defined _AMIGA || defined VMS
@ -1369,7 +1394,7 @@ glob_in_dir (const char *pattern, const char *directory, int flags,
/* If the file we found is a symlink we have to
make sure the target file exists. */
if (!DIRENT_MIGHT_BE_SYMLINK (d)
|| link_exists_p (directory, dirlen, name, pglob,
|| link_exists_p (dfd, directory, dirlen, name, pglob,
flags))
{
if (cur == names->count)