1 files changed, 49 insertions, 0 deletions
diff --git a/util/sbase/chroot.c b/util/sbase/chroot.c
new file mode 100644
index 00000000..45f2dc7a
--- /dev/null
+++ b/util/sbase/chroot.c
@@ -0,0 +1,49 @@
+/* See LICENSE file for copyright and license details. */
+#include <errno.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include "util.h"
+
+static void
+usage(void)
+{
+	eprintf("usage: %s dir [cmd [arg ...]]\n", argv0);
+}
+
+int
+main(int argc, char *argv[])
+{
+	char *shell[] = { "/bin/sh", "-i", NULL }, *aux, *cmd;
+	int savederrno;
+
+	ARGBEGIN {
+	default:
+		usage();
+	} ARGEND
+
+	if (!argc)
+		usage();
+
+	if ((aux = getenv("SHELL")))
+		shell[0] = aux;
+
+	if (chroot(argv[0]) < 0)
+		eprintf("chroot %s:", argv[0]);
+
+	if (chdir("/") < 0)
+		eprintf("chdir:");
+
+	if (argc == 1) {
+		cmd = *shell;
+		execvp(cmd, shell);
+	} else {
+		cmd = argv[1];
+		execvp(cmd, argv + 1);
+	}
+
+	savederrno = errno;
+	weprintf("execvp %s:", cmd);
+
+	_exit(126 + (savederrno == ENOENT));
+}