sd-id128: introduce id128_read_at()

[thirdparty/systemd.git] / src / libsystemd / sd-id128 / id128-util.c

diff --git a/src/libsystemd/sd-id128/id128-util.c b/src/libsystemd/sd-id128/id128-util.c
index 0d77b04735c2c561e5e8a5d25525e3cb6ccb2026..94094ed208a93eb2fca6af193b54b2405eefb227 100644 (file)
--- a/src/libsystemd/sd-id128/id128-util.c
+++ b/src/libsystemd/sd-id128/id128-util.c
@@ -5,6 +5,7 @@
 #include <unistd.h>
 
 #include "fd-util.h"
+#include "fs-util.h"
 #include "hexdecoct.h"
 #include "id128-util.h"
 #include "io-util.h"
@@ -101,14 +102,15 @@ int id128_read_fd(int fd, Id128Flag f, sd_id128_t *ret) {
         return r == -EINVAL ? -EUCLEAN : r;
 }
 
-int id128_read(const char *path, Id128Flag f, sd_id128_t *ret) {
+int id128_read_at(int dir_fd, const char *path, Id128Flag f, sd_id128_t *ret) {
         _cleanup_close_ int fd = -EBADF;
 
+        assert(dir_fd >= 0 || dir_fd == AT_FDCWD);
         assert(path);
 
-        fd = open(path, O_RDONLY|O_CLOEXEC|O_NOCTTY);
+        fd = xopenat(dir_fd, path, O_RDONLY|O_CLOEXEC|O_NOCTTY, 0);
         if (fd < 0)
-                return -errno;
+                return fd;
 
         return id128_read_fd(fd, f, ret);
 }