| /* |
| * Copyright (C) 2003-2007 Red Hat, Inc. |
| * |
| * This file is part of util-linux-ng. |
| * |
| * This file is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This file is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * |
| * Written by Elliot Lee <sopwith@redhat.com> |
| * New personality options & code added by Jindrich Novy <jnovy@redhat.com> |
| * ADD_NO_RANDOMIZE flag added by Arjan van de Ven <arjanv@redhat.com> |
| * Help and MIPS support from Mike Frysinger (vapier@gentoo.org) |
| * Better error handling from Dmitry V. Levin (ldv@altlinux.org) |
| * |
| * based on ideas from the ppc32 util by Guy Streeter (2002-01), based on the |
| * sparc32 util by Jakub Jelinek (1998, 1999) |
| */ |
| |
| #ifndef _GNU_SOURCE |
| # define _GNU_SOURCE |
| #endif |
| |
| #include <syscall.h> |
| #include <linux/personality.h> |
| #include <unistd.h> |
| #include <stdio.h> |
| #include <string.h> |
| #include <stdlib.h> |
| #include <errno.h> |
| #include <error.h> |
| #include <sys/utsname.h> |
| #include "nls.h" |
| |
| #define set_pers(pers) ((long)syscall(SYS_personality, pers)) |
| |
| struct { |
| char c; |
| const char *name; |
| unsigned int option; |
| } flags[] = { |
| {'R', "ADDR_NO_RANDOMIZE", 0x0040000}, |
| {'F', "FDPIC_FUNCPTRS", 0x0080000}, |
| {'Z', "MMAP_PAGE_ZERO", 0x0100000}, |
| {'L', "ADDR_COMPAT_LAYOUT", 0x0200000}, |
| {'X', "READ_IMPLIES_EXEC", 0x0400000}, |
| {'B', "ADDR_LIMIT_32BIT", 0x0800000}, |
| {'I', "SHORT_INODE", 0x1000000}, |
| {'S', "WHOLE_SECONDS", 0x2000000}, |
| {'T', "STICKY_TIMEOUTS", 0x4000000}, |
| {'3', "ADDR_LIMIT_3GB", 0x8000000} |
| }; |
| |
| static void __attribute__((__noreturn__)) |
| show_help(void) |
| { |
| int f; |
| const char *p = program_invocation_short_name; |
| |
| if (!*p) |
| p = "setarch"; |
| |
| printf(_("Usage: %s%s [options] [program [program arguments]]\n\nOptions:\n"), |
| p, !strcmp(p, "setarch") ? " <arch>" : ""); |
| |
| for (f = 0; f < sizeof(flags) / sizeof(flags[0]); f++) |
| printf(_("\t-%c\tEnable %s\n"), flags[f].c, flags[f].name); |
| |
| printf(_("\nFor more information see setarch(8).\n")); |
| exit(EXIT_SUCCESS); |
| } |
| |
| static void __attribute__((__noreturn__)) |
| show_usage(const char *s) |
| { |
| const char *p = program_invocation_short_name; |
| |
| if (!*p) |
| p = "setarch"; |
| |
| fprintf(stderr, _("%s: %s\nTry `%s --help' for more information.\n"), p, s, p); |
| exit(EXIT_FAILURE); |
| } |
| |
| int set_arch(const char *pers, unsigned long options) |
| { |
| struct utsname un; |
| int i; |
| unsigned long pers_value, res; |
| |
| struct { |
| int perval; |
| const char *target_arch, *result_arch; |
| } transitions[] = { |
| {PER_LINUX32, "linux32", NULL}, |
| {PER_LINUX, "linux64", NULL}, |
| #if defined(__powerpc__) || defined(__powerpc64__) |
| {PER_LINUX32, "ppc32", "ppc"}, |
| {PER_LINUX32, "ppc", "ppc"}, |
| {PER_LINUX, "ppc64", "ppc64"}, |
| {PER_LINUX, "ppc64pseries", "ppc64"}, |
| {PER_LINUX, "ppc64iseries", "ppc64"}, |
| #endif |
| #if defined(__x86_64__) || defined(__i386__) || defined(__ia64__) |
| {PER_LINUX32, "i386", "i386"}, |
| {PER_LINUX32, "i486", "i386"}, |
| {PER_LINUX32, "i586", "i386"}, |
| {PER_LINUX32, "i686", "i386"}, |
| {PER_LINUX32, "athlon", "i386"}, |
| #endif |
| #if defined(__x86_64__) || defined(__i386__) |
| {PER_LINUX, "x86_64", "x86_64"}, |
| #endif |
| #if defined(__ia64__) || defined(__i386__) |
| {PER_LINUX, "ia64", "ia64"}, |
| #endif |
| #if defined(__hppa__) |
| {PER_LINUX32, "parisc32", "parisc"}, |
| {PER_LINUX32, "parisc", "parisc"}, |
| {PER_LINUX, "parisc64", "parisc64"}, |
| #endif |
| #if defined(__s390x__) || defined(__s390__) |
| {PER_LINUX32, "s390", "s390"}, |
| {PER_LINUX, "s390x", "s390x"}, |
| #endif |
| #if defined(__sparc64__) || defined(__sparc__) |
| {PER_LINUX32, "sparc", "sparc"}, |
| {PER_LINUX32, "sparc32bash", "sparc"}, |
| {PER_LINUX32, "sparc32", "sparc"}, |
| {PER_LINUX, "sparc64", "sparc64"}, |
| #endif |
| #if defined(__mips64__) || defined(__mips__) |
| {PER_LINUX32, "mips32", "mips"}, |
| {PER_LINUX32, "mips", "mips"}, |
| {PER_LINUX, "mips64", "mips64"}, |
| #endif |
| #if defined(__alpha__) |
| {PER_LINUX, "alpha", "alpha"}, |
| #endif |
| {-1, NULL, NULL} |
| }; |
| |
| for(i = 0; transitions[i].perval >= 0; i++) |
| if(!strcmp(pers, transitions[i].target_arch)) |
| break; |
| |
| if(transitions[i].perval < 0) |
| error(EXIT_FAILURE, 0, _("%s: Unrecognized architecture"), pers); |
| |
| pers_value = transitions[i].perval | options; |
| res = set_pers(pers_value); |
| if(res == -EINVAL) |
| return 1; |
| |
| uname(&un); |
| if(transitions[i].result_arch && |
| strcmp(un.machine, transitions[i].result_arch)) |
| { |
| if(strcmp(transitions[i].result_arch, "i386") |
| || (strcmp(un.machine, "i486") |
| && strcmp(un.machine, "i586") |
| && strcmp(un.machine, "i686") |
| && strcmp(un.machine, "athlon"))) |
| error(EXIT_FAILURE, 0, _("%s: Unrecognized architecture"), pers); |
| } |
| |
| return 0; |
| } |
| |
| int main(int argc, char *argv[]) |
| { |
| const char *p; |
| unsigned long options = 0; |
| int verbose = 0; |
| |
| setlocale(LC_ALL, ""); |
| bindtextdomain(PACKAGE, LOCALEDIR); |
| textdomain(PACKAGE); |
| |
| if (argc < 1) |
| show_usage(_("Not enough arguments")); |
| |
| p = program_invocation_short_name; |
| if (!strcmp(p, "setarch")) { |
| argv++; |
| argc--; |
| if (argc < 1) |
| show_usage(_("Not enough arguments")); |
| p = argv[0]; |
| if (!strcmp(p, "-h") || !strcmp(p, "--help")) |
| show_help(); |
| } |
| #if defined(__sparc64__) || defined(__sparc__) |
| if (!strcmp(p, "sparc32bash")) { |
| if (set_arch(p, 0L)) |
| error(EXIT_FAILURE, errno, "Failed to set personality to %s", p); |
| execl("/bin/bash", NULL); |
| error(EXIT_FAILURE, errno, "/bin/bash"); |
| } |
| #endif |
| for (argv++, argc--; argc && argv[0][0] == '-'; argv++, argc--) { |
| int n, unknown = 1; |
| const char *arg = argv[0]; |
| |
| if (!strcmp(arg, "--help")) |
| show_help(); |
| |
| /* compatibitity with an old Debian setarch implementation |
| * TODO: add long options for all flags |
| */ |
| if (!strcmp(arg, "--3gb")) |
| arg="-3"; |
| else if (!strcmp(arg, "--4gb")) |
| continue; /* just ignore this one */ |
| |
| for (n = 1; arg[n]; n++) { |
| int f; |
| |
| if (arg[n] == 'v') { |
| verbose = 1; |
| continue; |
| } |
| |
| if (arg[n] == 'h') |
| show_help(); |
| |
| for (f = 0; f < sizeof(flags) / sizeof(flags[0]); f++) { |
| if (arg[n] == flags[f].c) { |
| if (verbose) |
| fprintf(stderr, _("Switching on %s.\n"), flags[f].name); |
| options |= flags[f].option; |
| unknown = 0; |
| break; |
| } |
| } |
| if (unknown) |
| error(0, 0, _("Unknown option `%c' ignored"), arg[n]); |
| } |
| } |
| |
| if (set_arch(p, options)) |
| error(EXIT_FAILURE, errno, _("Failed to set personality to %s"), p); |
| |
| if (!argc) { |
| execl("/bin/sh", "-sh", NULL); |
| error(EXIT_FAILURE, errno, "/bin/sh"); |
| } |
| |
| execvp(argv[0], argv); |
| error(EXIT_FAILURE, errno, "%s", argv[0]); |
| return EXIT_FAILURE; |
| } |