Index: util-linux-ng-2.12r+git20070330/disk-utils/mkswap.c
===================================================================
--- util-linux-ng-2.12r+git20070330.orig/disk-utils/mkswap.c
+++ util-linux-ng-2.12r+git20070330/disk-utils/mkswap.c
@@ -660,7 +660,7 @@ main(int argc, char ** argv) {
 		usage();
 	}
 
-	DEV = open(device_name,O_RDWR);
+	DEV = open(device_name, O_RDWR | O_EXCL);
 	if (DEV < 0 || fstat(DEV, &statbuf) < 0) {
 		perror(device_name);
 		exit(1);
Index: util-linux-ng-2.12r+git20070330/disk-utils/mkfs.minix.c
===================================================================
--- util-linux-ng-2.12r+git20070330.orig/disk-utils/mkfs.minix.c
+++ util-linux-ng-2.12r+git20070330/disk-utils/mkfs.minix.c
@@ -699,7 +699,7 @@ main(int argc, char ** argv) {
   tmp += dirsize;
   *(short *)tmp = 2;
   strcpy(tmp+2,".badblocks");
-  DEV = open(device_name,O_RDWR );
+  DEV = open(device_name,O_RDWR | O_EXCL);
   if (DEV<0)
     die(_("unable to open %s"));
   if (fstat(DEV,&statbuf)<0)
Index: util-linux-ng-2.12r+git20070330/disk-utils/mkfs.bfs.c
===================================================================
--- util-linux-ng-2.12r+git20070330.orig/disk-utils/mkfs.bfs.c
+++ util-linux-ng-2.12r+git20070330/disk-utils/mkfs.bfs.c
@@ -170,7 +170,7 @@ main(int argc, char *argv[]) {
 	if (!S_ISBLK(statbuf.st_mode))
 		fatal(_("%s is not a block special device"), device);
 
-	fd = open(device, O_RDWR);
+	fd = open(device, O_RDWR | O_EXCL);
 	if (fd == -1) {
 		perror(device);
 		fatal(_("cannot open %s"), device);