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authorKarel Zak2008-11-19 11:15:44 +0100
committerKarel Zak2008-11-19 12:40:06 +0100
commit1dabcd2498d12753a99832b88a75300d30eb1f66 (patch)
treee78bdedaa2b0366ac43628599ffba25b6a0c4ac4
parentbuild-sys: move pivot_root(8) to sys-utils (diff)
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pivot_root: clean up
Signed-off-by: Karel Zak <kzak@redhat.com>
-rw-r--r--sys-utils/pivot_root.c31
1 files changed, 16 insertions, 15 deletions
diff --git a/sys-utils/pivot_root.c b/sys-utils/pivot_root.c
index ba2dbbed0..f2a6f4834 100644
--- a/sys-utils/pivot_root.c
+++ b/sys-utils/pivot_root.c
@@ -1,30 +1,31 @@
-/* pivot_root.c - Change the root file system */
-
-/* Written 2000 by Werner Almesberger */
-
+/*
+ * pivot_root.c - Change the root file system
+ *
+ * Copyright (C) 2000 Werner Almesberger
+ *
+ * This file 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 file 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.
+ */
#include <stdio.h>
#include <sys/syscall.h>
#include <unistd.h>
#define pivot_root(new_root,put_old) syscall(SYS_pivot_root,new_root,put_old)
-#if 0
-/*
- * With kernelheaders 2.3.41 or later, and ancient libc, try the following.
- */
-#include <errno.h>
-#include <linux/unistd.h>
-static
-_syscall2(int,pivot_root,const char *,new_root,const char *,put_old)
-#endif
-
int main(int argc, const char **argv)
{
if (argc != 3) {
fprintf(stderr, "usage: %s new_root put_old\n", argv[0]);
return 1;
}
- if (pivot_root(argv[1],argv[2]) < 0) {
+ if (pivot_root(argv[1], argv[2]) < 0) {
perror("pivot_root");
return 1;
}