diff options
| -rw-r--r-- | include/applets.h | 7 | ||||
| -rw-r--r-- | include/usage.h | 7 | ||||
| -rw-r--r-- | util-linux/Config.in | 9 | ||||
| -rw-r--r-- | util-linux/Makefile.in | 1 | ||||
| -rw-r--r-- | util-linux/setarch.c | 54 |
5 files changed, 78 insertions, 0 deletions
diff --git a/include/applets.h b/include/applets.h index 6eb5cfd..e952ac4 100644 --- a/include/applets.h +++ b/include/applets.h @@ -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 diff --git a/include/usage.h b/include/usage.h index 22beead..63cd79f 100644 --- a/include/usage.h +++ b/include/usage.h @@ -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 \ diff --git a/util-linux/Config.in b/util-linux/Config.in index fbcf624..28292bd 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 90100ac..423d4b6 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 0000000..3543eb6 --- /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]); +} |