stat-util: don't try to open path on path_is_temporary_fs()

I mean, the old code at least used O_PATH, but still, we shouldn't
allocate/close an fd if we don't have to.

(cherry picked from commit 15308e5083391f6a1b9ce25c5b7323f37544eab8)
(cherry picked from commit a2f0da2de006c74bca64b3ce5b023e99bcca4498)

1 files changed, 3 insertions, 4 deletions

diff --git a/src/basic/stat-util.c b/src/basic/stat-util.c
index 904584a985..77e042ccaf 100644
--- a/src/basic/stat-util.c
+++ b/src/basic/stat-util.c
@@ -225,13 +225,12 @@ int fd_is_network_fs(int fd) {
 }
 
 int path_is_temporary_fs(const char *path) {
-        _cleanup_close_ int fd = -1;
+        struct statfs s;
 
-        fd = open(path, O_RDONLY|O_CLOEXEC|O_NOCTTY|O_PATH);
-        if (fd < 0)
+        if (statfs(path, &s) < 0)
                 return -errno;
 
-        return fd_is_temporary_fs(fd);
+        return is_temporary_fs(&s);
 }
 
 int stat_verify_regular(const struct stat *st) {