Use O_EXCL when opening component devices to be assembled into an array

In 2.6, this will fail if the device is already in use, so we can detect this error
more easily.

Signed-off-by: Neil Brown <neilb@cse.unsw.edu.au>

1 files changed, 1 insertions, 1 deletions

diff --git a/Kill.c b/Kill.c
index a57bdf8e..9441f73b 100644
--- a/Kill.c
+++ b/Kill.c
@@ -44,7 +44,7 @@ int Kill(char *dev, int force)
 	mdp_super_t super;
 	int fd, rv = 0;
 		
-	fd = open(dev, O_RDWR);
+	fd = open(dev, O_RDWR|O_EXCL);
 	if (fd < 0) {
 		fprintf(stderr, Name ": Couldn't open %s for write - not zeroing\n",
 			dev);