Implement 'dd' command.

1 files changed, 71 insertions, 0 deletions

diff --git a/daemon/dd.c b/daemon/dd.c
new file mode 100644
index 00000000..2402e13e
--- /dev/null
+++ b/daemon/dd.c
@@ -0,0 +1,71 @@
+/* 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 "../src/guestfs_protocol.h"
+#include "daemon.h"
+#include "actions.h"
+
+int
+do_dd (const char *src, const char *dest)
+{
+  int src_is_dev, dest_is_dev;
+  char *if_arg, *of_arg;
+  char *err;
+  int r;
+
+  src_is_dev = STRPREFIX (src, "/dev/");
+
+  if (src_is_dev)
+    r = asprintf (&if_arg, "if=%s", src);
+  else
+    r = asprintf (&if_arg, "if=%s%s", sysroot, src);
+  if (r == -1) {
+    reply_with_perror ("asprintf");
+    return -1;
+  }
+
+  dest_is_dev = STRPREFIX (dest, "/dev/");
+
+  if (dest_is_dev)
+    r = asprintf (&of_arg, "of=%s", dest);
+  else
+    r = asprintf (&of_arg, "of=%s%s", sysroot, dest);
+  if (r == -1) {
+    reply_with_perror ("asprintf");
+    free (if_arg);
+    return -1;
+  }
+
+  r = command (NULL, &err, "dd", "bs=1024K", if_arg, of_arg, NULL);
+  free (if_arg);
+  free (of_arg);
+
+  if (r == -1) {
+    reply_with_error ("dd: %s: %s: %s", src, dest, err);
+    free (err);
+    return -1;
+  }
+  free (err);
+
+  return 0;
+}