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-rw-r--r--src/basic/blockdev-util.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/basic/blockdev-util.c b/src/basic/blockdev-util.c
index 4e68e2496b..abf9bf02d8 100644
--- a/src/basic/blockdev-util.c
+++ b/src/basic/blockdev-util.c
@@ -68,7 +68,7 @@ int get_block_device(const char *path, dev_t *ret) {
/* Gets the block device directly backing a file system. If the block device is encrypted, returns
* the device mapper block device. */
- fd = open(path, O_NOFOLLOW|O_CLOEXEC);
+ fd = open(path, O_RDONLY|O_NOFOLLOW|O_CLOEXEC);
if (fd < 0)
return -errno;