X-Git-Url: http://git.annexia.org/?a=blobdiff_plain;ds=inline;f=daemon%2Fblkid.c;h=6d395c1b15ea28ad318b9725baaa673865592842;hb=e1f395defc6db5bbc82537af6e517d94216b7d4b;hp=1ddc8cdf353553853648392b8b5b17ea496c9bb9;hpb=85c71f8fff3e80f549342bf995b686ba7303c2b4;p=libguestfs.git

diff --git a/daemon/blkid.c b/daemon/blkid.c
index 1ddc8cd..6d395c1 100644
--- a/daemon/blkid.c
+++ b/daemon/blkid.c
@@ -13,7 +13,7 @@
  *
  * You should have received a copy of the GNU General Public License
  * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
 
 #include <config.h>
@@ -33,10 +33,16 @@ get_blkid_tag (const char *device, const char *tag)
   char *out, *err;
   int r;
 
-  r = command (&out, &err,
-               "blkid", "-o", "value", "-s", tag, device, NULL);
-  if (r == -1) {
-    reply_with_error ("%s: %s", device, err);
+  r = commandr (&out, &err,
+                "blkid",
+                /* Adding -c option kills all caching, even on RHEL 5. */
+                "-c", "/dev/null",
+                "-o", "value", "-s", tag, device, NULL);
+  if (r != 0 && r != 2) {
+    if (r >= 0)
+      reply_with_error ("%s: %s (blkid returned %d)", device, err, r);
+    else
+      reply_with_error ("%s: %s", device, err);
     free (out);
     free (err);
     return NULL;
@@ -44,6 +50,14 @@ get_blkid_tag (const char *device, const char *tag)
 
   free (err);
 
+  if (r == 2) {                 /* means UUID etc not found */
+    free (out);
+    out = strdup ("");
+    if (out == NULL)
+      reply_with_perror ("strdup");
+    return out;
+  }
+
   /* Trim trailing \n if present. */
   size_t len = strlen (out);
   if (len > 0 && out[len-1] == '\n')
@@ -57,3 +71,15 @@ do_vfs_type (const char *device)
 {
   return get_blkid_tag (device, "TYPE");
 }
+
+char *
+do_vfs_label (const char *device)
+{
+  return get_blkid_tag (device, "LABEL");
+}
+
+char *
+do_vfs_uuid (const char *device)
+{
+  return get_blkid_tag (device, "UUID");
+}