imsm: fix family number handling

[thirdparty/mdadm.git] / util.c

diff --git a/util.c b/util.c
index f09fd843c9aa8bec32aeb0e39da7e6c47e9ba5c2..2543971026656ac8afca07c30d3d2f983a4a55a0 100644 (file)
--- a/util.c
+++ b/util.c
@@ -1,7 +1,7 @@
 /*
  * mdadm - manage Linux "md" devices aka RAID arrays.
  *
- * Copyright (C) 2001-2006 Neil Brown <neilb@suse.de>
+ * Copyright (C) 2001-2009 Neil Brown <neilb@suse.de>
  *
  *
  *    This program is free software; you can redistribute it and/or modify
@@ -19,12 +19,7 @@
  *    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  *
  *    Author: Neil Brown
- *    Email: <neilb@cse.unsw.edu.au>
- *    Paper: Neil Brown
- *           School of Computer Science and Engineering
- *           The University of New South Wales
- *           Sydney, 2052
- *           Australia
+ *    Email: <neilb@suse.de>
  */
 
 #include       "mdadm.h"
@@ -1303,6 +1298,17 @@ int check_env(char *name)
        return 0;
 }
 
+__u32 random32(void)
+{
+       __u32 rv;
+       int rfd = open("/dev/urandom", O_RDONLY);
+       if (rfd < 0 || read(rfd, &rv, 4) != 4)
+               rv = random();
+       if (rfd >= 0)
+               close(rfd);
+       return rv;
+}
+
 #ifndef MDASSEMBLE
 int flush_metadata_updates(struct supertype *st)
 {