From: Lennart Poettering <lennart@poettering.net>
Date: Tue, 20 Dec 2016 18:09:27 +0000 (+0100)
Subject: util-lib: rework path_check_fstype() and path_is_temporary_fs() to use O_PATH
X-Git-Tag: v233.3~105
X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=commitdiff_plain;h=ce18349eedcec2ed6074c89e5ce9e7bee0770ec0

util-lib: rework path_check_fstype() and path_is_temporary_fs() to use O_PATH

Also, add tests to make sure this actually works as intended.
---

diff --git a/src/basic/stat-util.c b/src/basic/stat-util.c
index 0c3fbc8e1..9dbdae0a0 100644
--- a/src/basic/stat-util.c
+++ b/src/basic/stat-util.c
@@ -212,7 +212,7 @@ int fd_check_fstype(int fd, statfs_f_type_t magic_value) {
 int path_check_fstype(const char *path, statfs_f_type_t magic_value) {
         _cleanup_close_ int fd = -1;
 
-        fd = open(path, O_RDONLY|O_CLOEXEC|O_NOCTTY);
+        fd = open(path, O_RDONLY|O_CLOEXEC|O_NOCTTY|O_PATH);
         if (fd < 0)
                 return -errno;
 
@@ -237,7 +237,7 @@ int fd_is_temporary_fs(int fd) {
 int path_is_temporary_fs(const char *path) {
         _cleanup_close_ int fd = -1;
 
-        fd = open(path, O_RDONLY|O_CLOEXEC|O_NOCTTY);
+        fd = open(path, O_RDONLY|O_CLOEXEC|O_NOCTTY|O_PATH);
         if (fd < 0)
                 return -errno;