ifupdown: save some 100+ bytes of code in addstr()

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

diff --git a/util-linux/pivot_root.c b/util-linux/pivot_root.c
index 92fe4aeabe2a4e1479384b0396d0623161280806..bd02302c760bd58fd94d17733df577120a59c8c0 100644 (file)
--- a/util-linux/pivot_root.c
+++ b/util-linux/pivot_root.c
@@ -3,37 +3,22 @@
  * pivot_root.c - Change root file system.  Based on util-linux 2.10s
  *
  * busyboxed by Evin Robertson
+ * pivot_root syscall stubbed by Erik Andersen, so it will compile
+ *     regardless of the kernel being used.
+ *
+ * Licensed under GPL version 2, see file LICENSE in this tarball for details.
  */
 #include "busybox.h"
-#include <stdlib.h>
-#include <stdio.h>
-#include <sys/syscall.h>
-#include <linux/unistd.h>
-
-#ifndef __NR_pivot_root
-#error Sorry, but this kernel does not support the pivot_root syscall
-#endif
-
-static _syscall2(int,pivot_root,const char *,new_root,const char *,put_old)
 
+extern int pivot_root(const char * new_root,const char * put_old);
 
 int pivot_root_main(int argc, char **argv)
 {
-    if (argc != 3)
-        usage(pivot_root_usage);
-
-    if (pivot_root(argv[1],argv[2]) < 0)
-        perror_msg_and_die("pivot_root");
+       if (argc != 3)
+               bb_show_usage();
 
-    return EXIT_SUCCESS;
+       if (pivot_root(argv[1],argv[2]) < 0)
+               bb_perror_msg_and_die("pivot_root");
 
+       return EXIT_SUCCESS;
 }
-
-
-/*
-Local Variables:
-c-file-style: "linux"
-c-basic-offset: 4
-tab-width: 4
-End:
-*/