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(search_dir): Avoid use of uninitialized memory. Add a few __builtin_expect to mark unlikely error cases.

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This commit is contained in:
Ulrich Drepper 2001-07-20 17:51:33 +00:00
parent bab889aa27
commit 95ce33a55a
1 changed files with 23 additions and 5 deletions
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28
elf/ldconfig.c
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@ -654,7 +654,11 @@ search_dir (const struct dir_entry *entry)
if (((strncmp (direntry->d_name, "lib", 3) != 0
&& strncmp (direntry->d_name, "ld-", 3) != 0)
|| strstr (direntry->d_name, ".so") == NULL)
&& !is_hwcap_platform (direntry->d_name))
&& (
#ifdef _DIRENT_HAVE_D_TYPE
direntry->d_type == DT_REG ||
#endif
!is_hwcap_platform (direntry->d_name)))
continue;
len = strlen (entry->path) + strlen (direntry->d_name);
if (len > file_name_len)
@ -680,9 +684,9 @@ search_dir (const struct dir_entry *entry)
lstat_buf.st_mode = DTTOIF (direntry->d_type);
else
#endif
if (lstat64 (real_file_name, &lstat_buf))
if (__builtin_expect (lstat64 (real_file_name, &lstat_buf), 0))
{
error (0, errno, _("Can't lstat %s"), file_name);
error (0, errno, _("Cannot lstat %s"), file_name);
continue;
}
@ -691,10 +695,10 @@ search_dir (const struct dir_entry *entry)
{
/* In case of symlink, we check if the symlink refers to
a directory. */
if (stat64 (real_file_name, &stat_buf))
if (__builtin_expect (stat64 (real_file_name, &stat_buf), 0))
{
if (opt_verbose)
error (0, errno, _("Can't stat %s"), file_name);
error (0, errno, _("Cannot stat %s"), file_name);
continue;
}
is_dir = S_ISDIR (stat_buf.st_mode);
@ -718,6 +722,20 @@ search_dir (const struct dir_entry *entry)
}
else
{
#ifdef _DIRENT_HAVE_D_TYPE
/* We have filled in lstat only #ifndef
_DIRENT_HAVE_D_TYPE. Fill it in if needed. */
if (direntry->d_type != DT_UNKNOWN
&& __builtin_expect (lstat64 (real_file_name, &lstat_buf),
0))
{
error (0, errno, _("Cannot lstat %s"), file_name);
free (new_entry->path);
free (new_entry);
continue;
}
#endif
new_entry->ino = lstat_buf.st_ino;
new_entry->dev = lstat_buf.st_dev;
}