From 857533a523d058e9833a553f6ef192ff1ab33b15 Mon Sep 17 00:00:00 2001
From: Lennart Poettering <lennart@poettering.net>
Date: Tue, 23 Mar 2021 14:04:59 +0100
Subject: [PATCH] blockdev-util: actually specify an access mode on open()
Linux is pretty lenient here, but we should specify the access mode.
(cherry picked from commit 86b86107942e84de4eb22944251694c0ae21b3ee)
---
src/basic/blockdev-util.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/src/basic/blockdev-util.c b/src/basic/blockdev-util.c
index 2f3f1aecc8..676ad9351b 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;