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authorEric Andersen2001-02-13 20:04:30 +0000
committerEric Andersen2001-02-13 20:04:30 +0000
commit6fd8c664c1bcb44429b81444be640ff08cac3702 (patch)
treea8faf540fe49e308e52e1694e00f280ac51b9192 /util-linux/pivot_root.c
parent3af1f88725348b15a0aa467b5734d55210bedf7c (diff)
downloadbusybox-6fd8c664c1bcb44429b81444be640ff08cac3702.zip
busybox-6fd8c664c1bcb44429b81444be640ff08cac3702.tar.gz
Apply a patch from Evin Robertson -- new pivot_root applet.
-Erik
Diffstat (limited to 'util-linux/pivot_root.c')
-rw-r--r--util-linux/pivot_root.c39
1 files changed, 39 insertions, 0 deletions
diff --git a/util-linux/pivot_root.c b/util-linux/pivot_root.c
new file mode 100644
index 0000000..92fe4ae
--- /dev/null
+++ b/util-linux/pivot_root.c
@@ -0,0 +1,39 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * pivot_root.c - Change root file system. Based on util-linux 2.10s
+ *
+ * busyboxed by Evin Robertson
+ */
+#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)
+
+
+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");
+
+ return EXIT_SUCCESS;
+
+}
+
+
+/*
+Local Variables:
+c-file-style: "linux"
+c-basic-offset: 4
+tab-width: 4
+End:
+*/