fix examine_brief segfault

[thirdparty/mdadm.git] / mdopen.c

diff --git a/mdopen.c b/mdopen.c
index 5d478f5b5fdbcdb74f5572ff11788b6d6c521682..d322cf42ad515327800290b2c6c1787d243212c2 100644 (file)
--- a/mdopen.c
+++ b/mdopen.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"
@@ -238,11 +233,19 @@ int create_mddev(char *dev, char *name, int autof, int trustworthy,
                        use_mdp = 0;
        }
        if (num < 0 && trustworthy == LOCAL && name) {
-               /* if name is numeric, use that for num
+               /* if name is numeric, possibly prefixed by 
+                * 'md' or '/dev/md', use that for num
                 * if it is not already in use */
                char *ep;
-               num = strtoul(name, &ep, 10);
-               if (ep == name || *ep)
+               char *n2 = name;
+               if (strncmp(n2, "/dev/", 5) == 0)
+                       n2 += 5;
+               if (strncmp(n2, "md", 2) == 0)
+                       n2 += 2;
+               if (*n2 == '/')
+                       n2++;
+               num = strtoul(n2, &ep, 10);
+               if (ep == n2 || *ep)
                        num = -1;
                else if (mddev_busy(use_mdp ? (-1-num) : num))
                        num = -1;
@@ -303,7 +306,10 @@ int create_mddev(char *dev, char *name, int autof, int trustworthy,
                                conflict = 0;
                }
        }
-       if (cname[0] == 0)
+
+       if (dev)
+               strcpy(chosen, dev);
+       else if (cname[0] == 0)
                strcpy(chosen, devname);
 
        /* We have a device number and name.