[LEDE-DEV] [PATCH 2/2] utils: use O_PATH when opening /dev

[Jo-Philipp Wich]

Use the O_PATH and O_DIRECTORY flags when opening the "/dev" path for the
subsequent openat() call to ensure that it is indeed a directory.

Signed-off-by: Jo-Philipp Wich <jo at mein.io>
---
 utils/utils.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/utils/utils.c b/utils/utils.c
index ebf5447..e2e3396 100644
--- a/utils/utils.c
+++ b/utils/utils.c
@@ -165,7 +165,7 @@ int patch_fd(const char *device, int fd, int flags)
 		device = "/dev/null";
 
 	if (*device != '/') {
-		dfd = open("/dev", O_RDONLY);
+		dfd = open("/dev", O_PATH|O_DIRECTORY);
 
 		if (dfd < 0)
 			return -1;
-- 
2.1.4