btrfs-progs: check for open failure, don't close

Check for failure by testing for a negative file descriptor, not a
descriptor of 0.  And if it failed we have nothing to close().

Signed-off-by: Zach Brown <zab@redhat.com>

diff --git a/cmds-device.c b/cmds-device.c
index d4938f4..7a0f7a4 100644 (file)
--- a/cmds-device.c
+++ b/cmds-device.c
@@ -87,9 +87,8 @@ static int cmd_add_dev(int argc, char **argv)
                }
 
                devfd = open(argv[i], O_RDWR);
-               if (!devfd) {
+               if (devfd < 0) {
                        fprintf(stderr, "ERROR: Unable to open device '%s'\n", argv[i]);
-                       close(devfd);
                        ret++;
                        continue;
                }