From 8e34ca64823183b94c5e1fdc632b311bafc5d9da Mon Sep 17 00:00:00 2001
From: Rob Landley <rob@landley.net>
Date: Mon, 3 Dec 2007 19:28:51 -0600
Subject: Add chroot.

---
 toys/Config.in |  8 ++++++++
 toys/chroot.c  | 14 ++++++++++++++
 toys/toylist.h |  1 +
 3 files changed, 23 insertions(+)
 create mode 100644 toys/chroot.c

diff --git a/toys/Config.in b/toys/Config.in
index a53c11f1..ba2bbf32 100644
--- a/toys/Config.in
+++ b/toys/Config.in
@@ -40,6 +40,14 @@ config CATV
 	  -t	Show tabs as ^I
 	  -v	Don't use ^x or M-x escapes.
 
+config CHROOT
+	bool "chroot"
+	default y
+	help
+	  usage: chroot NEWPATH [commandline...]
+
+	  Run command within a new root directory.  If no command, run /bin/sh.
+
 config COUNT
 	bool "count"
 	default y
diff --git a/toys/chroot.c b/toys/chroot.c
new file mode 100644
index 00000000..0126d968
--- /dev/null
+++ b/toys/chroot.c
@@ -0,0 +1,14 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * chroot.c - Run command in new root directory.
+ */
+
+#include "toys.h"
+
+void chroot_main(void)
+{
+	char *binsh[] = {"/bin/sh", 0};
+	if (chdir(*toys.optargs) || chroot("."))
+		perror_exit("%s", *toys.optargs);
+	xexec(toys.optargs[1] ? toys.optargs+1 : binsh);
+}
diff --git a/toys/toylist.h b/toys/toylist.h
index 360efa8a..f24266bb 100644
--- a/toys/toylist.h
+++ b/toys/toylist.h
@@ -119,6 +119,7 @@ NEWTOY(toybox, NULL, 0)
 USE_BASENAME(NEWTOY(basename, "<1>2", TOYFLAG_BIN))
 USE_BZCAT(NEWTOY(bzcat, "", TOYFLAG_USR|TOYFLAG_BIN))
 USE_CATV(NEWTOY(catv, "vte", TOYFLAG_USR|TOYFLAG_BIN))
+USE_CHROOT(NEWTOY(chroot, "<1", TOYFLAG_USR|TOYFLAG_SBIN))
 USE_COUNT(NEWTOY(count, "", TOYFLAG_USR|TOYFLAG_BIN))
 USE_TOYSH(NEWTOY(cd, NULL, TOYFLAG_NOFORK))
 USE_DF(NEWTOY(df, "Pkt*a", TOYFLAG_USR|TOYFLAG_SBIN))
-- 
cgit v1.2.3