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Ensure d_type is not DT_UNKNOWN before relying on it

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Fixes FS#23090, a rather serious problem where the user was completely
unable to read the local database. Even if entry->d_type is available,
the given filesystem providing it may not fill the contents, in which
case we should fall back to a stat() as we did before. In this case, the
filesystem was XFS but there may be others.

Signed-off-by: Dan McGee <dan@archlinux.org>
This commit is contained in:
Dan McGee 2011-03-01 13:39:43 -06:00
parent 09ce8b446c
commit b12be99c89
1 changed files with 13 additions and 9 deletions
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12
lib/libalpm/be_local.c
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@ -351,18 +351,22 @@ static int checkdbdir(pmdb_t *db)
static int is_dir(const char *path, struct dirent *entry) static int is_dir(const char *path, struct dirent *entry)
{ {
#ifdef HAVE_STRUCT_DIRENT_D_TYPE #ifdef HAVE_STRUCT_DIRENT_D_TYPE
if(entry->d_type != DT_UNKNOWN) {
return(entry->d_type == DT_DIR); return(entry->d_type == DT_DIR);
#else }
#endif
{
char buffer[PATH_MAX]; char buffer[PATH_MAX];
struct stat sbuf;
snprintf(buffer, PATH_MAX, "%s/%s", path, entry->d_name); snprintf(buffer, PATH_MAX, "%s/%s", path, entry->d_name);
struct stat sbuf;
if (!stat(buffer, &sbuf)) { if (!stat(buffer, &sbuf)) {
return(S_ISDIR(sbuf.st_mode)); return(S_ISDIR(sbuf.st_mode));
} }
}
return(0); return(0);
#endif
} }
static int local_db_populate(pmdb_t *db) static int local_db_populate(pmdb_t *db)
@ -462,7 +466,7 @@ static int local_db_populate(pmdb_t *db)
} }
/* add to the collection */ /* add to the collection */
_alpm_log(PM_LOG_FUNCTION, "adding '%s' to package cache for db '%s'\n", _alpm_log(PM_LOG_DEBUG, "adding '%s' to package cache for db '%s'\n",
pkg->name, db->treename); pkg->name, db->treename);
db->pkgcache = _alpm_pkghash_add(db->pkgcache, pkg); db->pkgcache = _alpm_pkghash_add(db->pkgcache, pkg);
count++; count++;