util: make env checking more generic

[thirdparty/mdadm.git] / Kill.c

diff --git a/Kill.c b/Kill.c
index a57bdf8e484e4f1cd63f7cd927962eb865556bf0..d5c1e36df4d3724e6cf060238902cb897e01bfed 100644 (file)
--- a/Kill.c
+++ b/Kill.c
@@ -1,7 +1,7 @@
 /*
  * mdadm - manage Linux "md" devices aka RAID arrays.
  *
- * Copyright (C) 2001-2002 Neil Brown <neilb@cse.unsw.edu.au>
+ * Copyright (C) 2001-2006 Neil Brown <neilb@suse.de>
  *
  *
  *    This program is free software; you can redistribute it and/or modify
@@ -34,48 +34,46 @@
 #include       "md_u.h"
 #include       "md_p.h"
 
-int Kill(char *dev, int force)
+int Kill(char *dev, int force, int quiet, int noexcl)
 {
        /*
         * Nothing fancy about Kill.  It just zeroes out a superblock
         * Definitely not safe.
         */
 
-       mdp_super_t super;
        int fd, rv = 0;
-               
-       fd = open(dev, O_RDWR);
+       struct supertype *st;
+
+       fd = open(dev, O_DIRECT | (noexcl ? O_RDWR : (O_RDWR|O_EXCL)));
        if (fd < 0) {
-               fprintf(stderr, Name ": Couldn't open %s for write - not zeroing\n",
-                       dev);
+               if (!quiet)
+                       fprintf(stderr, Name ": Couldn't open %s for write - not zeroing\n",
+                               dev);
+               close(fd);
                return 1;
-       } 
-       rv = load_super(fd, &super);
-       if (force && rv >= 5)
-               rv = 0; /* ignore bad data in superblock */
-       switch(rv) {
-       case 1:
-               fprintf(stderr, Name ": cannot file device size for %s: %s\n",
-                       dev, strerror(errno));
-               break;
-       case 2:
-               fprintf(stderr, Name ": %s is too small for md.\n", dev);
-               break;
-       case 3:
-       case 4:
-               fprintf(stderr, Name ": cannot access superblock on %s.\n", dev);
-               break;
-       case 5:
-       case 6:
-               fprintf(stderr, Name ": %s does not appear to have an MD superblock.\n", dev);
-               break;
        }
-       if (!rv) {
-               memset(&super, 0, sizeof(super));
-               if (store_super(fd, &super)) {
-                       fprintf(stderr, Name ": Could not zero superblock on %s\n",
-                               dev);
+       st = guess_super(fd);
+       if (st == NULL) {
+               if (!quiet)
+                       fprintf(stderr, Name ": Unrecognised md component device - %s\n", dev);
+               close(fd);
+               return 1;
+       }
+       rv = st->ss->load_super(st, fd, dev);
+       if (force && rv >= 2)
+               rv = 0; /* ignore bad data in superblock */
+       if (rv== 0 || (force && rv >= 2)) {
+               st->ss->free_super(st);
+               st->ss->init_super(st, NULL, 0, "", NULL, NULL);
+               if (st->ss->store_super(st, fd)) {
+                       if (!quiet)
+                               fprintf(stderr, Name ": Could not zero superblock on %s\n",
+                                       dev);
                        rv = 1;
+               } else if (rv) {
+                       if (!quiet)
+                               fprintf(stderr, Name ": superblock zeroed anyway\n");
+                       rv = 0;
                }
        }
        close(fd);