New API: vfs_type - get the Linux VFS driver for a mounted device.

[libguestfs.git] / daemon / blkid.c

diff --git a/daemon/blkid.c b/daemon/blkid.c
new file mode 100644 (file)
index 0000000..4e14881
--- /dev/null
+++ b/daemon/blkid.c
@@ -0,0 +1,53 @@
+/* libguestfs - the guestfsd daemon
+ * Copyright (C) 2009 Red Hat Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * 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.
+ */
+
+#include <config.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <limits.h>
+
+#include "daemon.h"
+#include "actions.h"
+
+char *
+do_vfs_type (const char *device)
+{
+  char *out, *err;
+  int r;
+
+  r = command (&out, &err,
+               "/sbin/blkid", "-o", "value", "-s", "TYPE", device, NULL);
+  if (r == -1) {
+    reply_with_error ("vfs_type: %s: %s", device, err);
+    free (out);
+    free (err);
+    return NULL;
+  }
+
+  free (err);
+
+  /* Trim trailing \n if present. */
+  size_t len = strlen (out);
+  if (len > 0 && out[len-1] == '\n')
+    out[len-1] = '\0';
+
+  return out;                   /* caller frees */
+}