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Fall back on lstat(2) if d_type in struct dirent is DT_UNKNOWN.

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Not all file systems support d_type.  Bug #572
This commit is contained in:
Todd C. Miller
2012-09-17 13:20:30 -04:00
parent 37d70a999c
commit f808fead0a
1 changed files with 14 additions and 5 deletions
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19
plugins/sudoers/sudoreplay.c
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@@ -968,6 +968,11 @@ find_sessions(const char *dir, REGEX_T *re, const char *user, const char *tty)
size_t sdlen, sessions_len = 0, sessions_size = 36*36;
int i, len;
char pathbuf[PATH_MAX], **sessions = NULL;
#ifdef HAVE_STRUCT_DIRENT_D_TYPE
bool checked_type = true;
#else
const bool checked_type = false;
#endif
debug_decl(find_sessions, SUDO_DEBUG_UTIL)
d = opendir(dir);
@@ -991,8 +996,14 @@ find_sessions(const char *dir, REGEX_T *re, const char *user, const char *tty)
(dp->d_name[1] == '.' && dp->d_name[2] == '\0')))
continue;
#ifdef HAVE_STRUCT_DIRENT_D_TYPE
if (dp->d_type != DT_DIR)
continue;
if (checked_type) {
if (dp->d_type != DT_DIR) {
/* Not all file systems support d_type. */
if (dp->d_type != DT_UNKNOWN)
continue;
checked_type = false;
}
}
#endif
/* Add name to session list. */
@@ -1021,9 +1032,7 @@ find_sessions(const char *dir, REGEX_T *re, const char *user, const char *tty)
} else {
/* Strip off "/log" and recurse if a dir. */
pathbuf[sdlen + len - 4] = '\0';
#ifndef HAVE_STRUCT_DIRENT_D_TYPE
if (lstat(pathbuf, &sb) == 0 && S_ISDIR(sb.st_mode))
#endif
if (checked_type || (lstat(pathbuf, &sb) == 0 && S_ISDIR(sb.st_mode)))
find_sessions(pathbuf, re, user, tty);
}
}