Improve error message when trying to create an array that already exists.

From: Doug Ledford <dledford@redhat.com>

Simple bugfix.  If an array already exists and we are asked to create
this array, error out with an error message that makes sense to people
instead of an error that the SET_ARRAY_INFO ioctl had an invalid
argument.  Plus a typo correction.

1 files changed, 11 insertions, 1 deletions

diff --git a/Create.c b/Create.c
index 2a4335a..08972ae 100644
--- a/Create.c
+++ b/Create.c
@@ -81,6 +81,15 @@ int Create(struct supertype *st, char *mddev, int mdfd,
 	if (vers < 9000) {
 		fprintf(stderr, Name ": Create requires md driver version 0.90.0 or later\n");
 		return 1;
+	} else {
+		mdu_array_info_t inf;
+		memset(&inf, 0, sizeof(inf));
+		ioctl(mdfd, GET_ARRAY_INFO, &inf);
+		if (inf.working_disks != 0) {
+			fprintf(stderr, Name ": another array by this name"
+				" is already running.\n");
+			return 1;
+		}
 	}
 	if (level == UnSet) {
 		fprintf(stderr,
@@ -225,7 +234,8 @@ int Create(struct supertype *st, char *mddev, int mdfd,
 			}
 			if (st->ss->major != 0 ||
 			    st->minor_version != 90)
-				fprintf(stderr, Name ": Defaulting to verion %d.%d metadata\n",
+				fprintf(stderr, Name ": Defaulting to version"
+					" %d.%d metadata\n",
 					st->ss->major,
 					st->minor_version);
 		}