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add setarch/linux32/linux64 applet

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This commit is contained in:
Mike Frysinger 2006-02-21 04:26:52 +00:00
parent ea6360e393
commit 0a6b0bfa7a
5 changed files with 78 additions and 0 deletions
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7
include/applets.h
View File

@ -378,6 +378,10 @@
#ifdef CONFIG_FEATURE_INITRD
APPLET_NOUSAGE("linuxrc", init_main, _BB_DIR_ROOT, _BB_SUID_NEVER)
#endif
#ifdef CONFIG_SETARCH
APPLET_NOUSAGE("linux32", setarch_main, _BB_DIR_BIN, _BB_SUID_NEVER)
APPLET_NOUSAGE("linux64", setarch_main, _BB_DIR_BIN, _BB_SUID_NEVER)
#endif
#ifdef CONFIG_LN
APPLET(ln, ln_main, _BB_DIR_BIN, _BB_SUID_NEVER)
#endif
@ -586,6 +590,9 @@
#ifdef CONFIG_SEQ
APPLET(seq, seq_main, _BB_DIR_USR_BIN, _BB_SUID_NEVER)
#endif
#ifdef CONFIG_SETARCH
APPLET(setarch, setarch_main, _BB_DIR_BIN, _BB_SUID_NEVER)
#endif
#ifdef CONFIG_SETCONSOLE
APPLET(setconsole, setconsole_main, _BB_DIR_SBIN, _BB_SUID_NEVER)
#endif

7
include/usage.h
View File

@ -1626,6 +1626,13 @@
"\t\treached.\n" \
"\t-h, -?\tDisplay this help message\n"
#define setarch_trivial_usage \
"<personality> <program> [args ...]"
#define setarch_full_usage \
"Personality may be:\n" \
"\tlinux32\tSet 32bit uname emulation\n" \
"\tlinux64\tSet 64bit uname emulation"
#define ln_trivial_usage \
"[OPTION] TARGET... LINK_NAME|DIRECTORY"
#define ln_full_usage \

9
util-linux/Config.in
View File

@ -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

1
util-linux/Makefile.in
View File

@ -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

54
util-linux/setarch.c Normal file
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@ -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]);
}