1 files changed, 52 insertions, 0 deletions

diff --git a/util-linux/setarch.c b/util-linux/setarch.c
new file mode 100644
index 000000000..d7e1c0917
--- /dev/null
+++ b/util-linux/setarch.c
@@ -0,0 +1,52 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * Linux32/linux64 allows for changing uname emulation.
+ *
+ * Copyright 2002 Andi Kleen, SuSE Labs.
+ *
+ * Licensed under GPL v2 or later, see file License for details.
+*/
+
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+#include <stdio.h>
+#include <sys/personality.h>
+
+#include "busybox.h"
+
+int setarch_main(int ATTRIBUTE_UNUSED argc, char **argv)
+{
+        int pers = -1;
+
+        /* Figure out what personality we are supposed to switch to ...
+         * we can be invoked as either:
+         * argv[0],argv[1] -> "setarch","personality"
+         * argv[0]         -> "personality"
+         */
+retry:
+        if (argv[0][5] == '6') /* linux64 */
+                pers = PER_LINUX;
+        else if (argv[0][5] == '3') /* linux32 */
+                pers = PER_LINUX32;
+        else if (pers == -1 && argv[1] != NULL) {
+                pers = PER_LINUX32;
+                ++argv;
+                goto retry;
+        }
+
+        /* make user actually gave us something to do */
+        ++argv;
+        if (argv[0] == NULL)
+                bb_show_usage();
+
+        /* Try to set personality */
+        if (personality(pers) >= 0) {
+
+                /* Try to execute the program */
+                execvp(argv[0], argv);
+        }
+
+        bb_perror_msg_and_die("%s", argv[0]);
+}