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authorGravatar Mike Frysinger <vapier@gentoo.org>2006-02-21 04:26:52 +0000
committerGravatar Mike Frysinger <vapier@gentoo.org>2006-02-21 04:26:52 +0000
commit0a6b0bfa7a821b594d237611e3f1effb1b3692fc (patch)
tree5313b93950024acfa71e58b53375957199ab9586 /util-linux
parentea6360e3938d016b2dfa6d0cbc9c9577070dca75 (diff)
downloadbusybox-0a6b0bfa7a821b594d237611e3f1effb1b3692fc.tar.gz
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add setarch/linux32/linux64 applet
Diffstat (limited to 'util-linux')
-rw-r--r--util-linux/Config.in9
-rw-r--r--util-linux/Makefile.in1
-rw-r--r--util-linux/setarch.c54
3 files changed, 64 insertions, 0 deletions
diff --git a/util-linux/Config.in b/util-linux/Config.in
index fbcf62476..28292bd40 100644
--- a/util-linux/Config.in
+++ b/util-linux/Config.in
@@ -354,6 +354,15 @@ config CONFIG_READPROFILE
help
This allows you to parse /proc/profile for basic profiling.
+config CONFIG_SETARCH
+ bool "setarch"
+ default n
+ help
+ The linux32 utility is used to create a 32bit environment for the
+ specified program (usually a shell). It only makes sense to have
+ this util on a system that supports both 64bit and 32bit userland
+ (like amd64/x86, ppc64/ppc, sparc64/sparc, etc...).
+
config CONFIG_SWAPONOFF
bool "swaponoff"
default n
diff --git a/util-linux/Makefile.in b/util-linux/Makefile.in
index 90100aceb..423d4b6c0 100644
--- a/util-linux/Makefile.in
+++ b/util-linux/Makefile.in
@@ -33,6 +33,7 @@ UTILLINUX-$(CONFIG_FEATURE_MOUNT_NFS) +=nfsmount.o
UTILLINUX-$(CONFIG_PIVOT_ROOT) +=pivot_root.o
UTILLINUX-$(CONFIG_RDATE) +=rdate.o
UTILLINUX-$(CONFIG_READPROFILE) +=readprofile.o
+UTILLINUX-$(CONFIG_SETARCH) +=setarch.o
UTILLINUX-$(CONFIG_SWAPONOFF) +=swaponoff.o
UTILLINUX-$(CONFIG_SWITCH_ROOT) +=switch_root.o
UTILLINUX-$(CONFIG_UMOUNT) +=umount.o
diff --git a/util-linux/setarch.c b/util-linux/setarch.c
new file mode 100644
index 000000000..3543eb6a2
--- /dev/null
+++ b/util-linux/setarch.c
@@ -0,0 +1,54 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * Linux32/linux64 allows for changing uname emulation.
+ *
+ * Copyright 2002 Andi Kleen, SuSE Labs.
+ * This file is subject to the GNU General Public License v2
+ *
+ * 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 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 (!strcmp(argv[0], "linux64"))
+ pers = PER_LINUX;
+ else if (!strcmp(argv[0], "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)
+ goto failure;
+
+ /* Try to execute the program */
+ execvp(argv[0], argv);
+
+failure:
+ bb_perror_msg_and_die(argv[0]);
+}