dd: code shrink

[oweals/busybox.git] / util-linux / switch_root.c

diff --git a/util-linux/switch_root.c b/util-linux/switch_root.c
index e2da119de2578e1894ee1881112a11f6e0d71cd8..a301b365b8955bce3f518e051f098fcaed6ab4b6 100644 (file)
--- a/util-linux/switch_root.c
+++ b/util-linux/switch_root.c
@@ -3,8 +3,17 @@
  *
  * Switch from rootfs to another filesystem as the root of the mount tree.
  *
- * Licensed under GPL version 2, see file LICENSE in this tarball for details.
+ * Licensed under GPLv2, see file LICENSE in this source tree.
  */
+
+//usage:#define switch_root_trivial_usage
+//usage:       "[-c /dev/console] NEW_ROOT NEW_INIT [ARGS]"
+//usage:#define switch_root_full_usage "\n\n"
+//usage:       "Free initramfs and switch to another root fs:\n"
+//usage:       "chroot to NEW_ROOT, delete all in /, move NEW_ROOT to /,\n"
+//usage:       "execute NEW_INIT. PID must be 1. NEW_ROOT must be a mountpoint.\n"
+//usage:     "\n       -c DEV  Reopen stdio to DEV after switch"
+
 #include <sys/vfs.h>
 #include <sys/mount.h>
 #include "libbb.h"
@@ -105,7 +114,7 @@ int switch_root_main(int argc UNUSED_PARAM, char **argv)
        }
        xchroot(".");
        // The chdir is needed to recalculate "." and ".." links
-       xchdir("/");
+       /*xchdir("/"); - done in xchroot */
 
        // If a new console specified, redirect stdin/stdout/stderr to it
        if (console) {