# define personality(pers) ((long)syscall(SYS_personality, pers))
#endif
-/* Options without equivalent short options */
-enum {
- OPT_4GB = CHAR_MAX + 1,
- OPT_UNAME26
-};
-
#define turn_on(_flag, _opts) \
do { \
(_opts) |= _flag; \
# define ADDR_LIMIT_3GB 0x8000000
#endif
-static void __attribute__((__noreturn__)) show_help(void)
+
+struct arch_domain {
+ int perval; /* PER_* */
+ const char *target_arch;
+ const char *result_arch;
+};
+
+
+static void __attribute__((__noreturn__)) usage(int archwrapper)
{
fputs(USAGE_HEADER, stdout);
- if (!strcmp(program_invocation_short_name, "setarch"))
- printf(_(" %s
<arch> [options] [<program> [<argument>...]]\n"), program_invocation_short_name);
+ if (!archwrapper)
+ printf(_(" %s
[<arch>] [options] [<program> [<argument>...]]\n"), program_invocation_short_name);
else
printf(_(" %s [options] [<program> [<argument>...]]\n"), program_invocation_short_name);
fputs(_(" --4gb ignored (for backward compatibility only)\n"), stdout);
fputs(_(" --uname-2.6 turns on UNAME26\n"), stdout);
fputs(_(" -v, --verbose say what options are being switched on\n"), stdout);
- fputs(_(" --list list settable architectures, and exit\n"), stdout);
+
+ if (!archwrapper)
+ fputs(_(" --list list settable architectures, and exit\n"), stdout);
fputs(USAGE_SEPARATOR, stdout);
- fputs(USAGE_HELP, stdout);
- fputs(USAGE_VERSION, stdout);
+ printf(USAGE_HELP_OPTIONS(26));
printf(USAGE_MAN_TAIL("setarch(8)"));
exit(EXIT_SUCCESS);
}
-static void __attribute__((__noreturn__)) show_usage(const char *s)
-{
- if (s)
- errx(EXIT_FAILURE,
- _("%s\nTry `%s --help' for more information."), s,
- program_invocation_short_name);
- else
- errx(EXIT_FAILURE, _("Try `%s --help' for more information."),
- program_invocation_short_name);
-}
-
-static void __attribute__((__noreturn__))
- show_version(void)
+/*
+ * Returns inilialized list of all available execution domains.
+ */
+static struct arch_domain *init_arch_domains(void)
{
- printf(UTIL_LINUX_VERSION);
- exit(EXIT_SUCCESS);
-}
+ static struct utsname un;
+ size_t i;
-static int set_arch(const char *pers, unsigned long options, int list)
-{
- struct utsname un;
- int i;
- unsigned long pers_value;
-
- struct {
- int perval;
- const char *target_arch, *result_arch;
- } transitions[] = {
+ static struct arch_domain transitions[] =
+ {
{UNAME26, "uname26", NULL},
{PER_LINUX32, "linux32", NULL},
{PER_LINUX, "linux64", NULL},
{PER_LINUX, "ppc64pseries", "ppc64"},
{PER_LINUX, "ppc64iseries", "ppc64"},
# else
- PER_LINUX32, "ppc32le", "ppcle"},
- PER_LINUX32, "ppcle", "ppcle"},
- PER_LINUX, "ppc64le", "ppc64le"},
+ {PER_LINUX32, "ppc32", "ppcle"},
+ {PER_LINUX32, "ppc", "ppcle"},
+ {PER_LINUX32, "ppc32le", "ppcle"},
+ {PER_LINUX32, "ppcle", "ppcle"},
+ {PER_LINUX, "ppc64le", "ppc64le"},
# endif
#endif
#if defined(__x86_64__) || defined(__i386__) || defined(__ia64__)
{PER_LINUX, "alphaev56", "alpha"},
{PER_LINUX, "alphaev6", "alpha"},
{PER_LINUX, "alphaev67", "alpha"},
+#endif
+#if defined(__e2k__)
+ {PER_LINUX, "e2k", "e2k"},
+ {PER_LINUX, "e2kv4", "e2k"},
+ {PER_LINUX, "e2kv5", "e2k"},
+ {PER_LINUX, "e2kv6", "e2k"},
+ {PER_LINUX, "e2k4c", "e2k"},
+ {PER_LINUX, "e2k8c", "e2k"},
+ {PER_LINUX, "e2k1cp", "e2k"},
+ {PER_LINUX, "e2k8c2", "e2k"},
+ {PER_LINUX, "e2k12c", "e2k"},
+ {PER_LINUX, "e2k16c", "e2k"},
+ {PER_LINUX, "e2k2c3", "e2k"},
#endif
/* place holder, will be filled up at runtime */
{-1, NULL, NULL},
transitions[i].result_arch = un.machine;
}
}
- if (list) {
- for (i = 0; transitions[i].target_arch != NULL; i++)
- printf("%s\n", transitions[i].target_arch);
- return 0;
- }
- for (i = 0; transitions[i].perval >= 0; i++)
- if (!strcmp(pers, transitions[i].target_arch))
+
+ return transitions;
+}
+
+/*
+ * List all execution domains from transitions
+ */
+static void list_arch_domains(struct arch_domain *doms)
+{
+ struct arch_domain *d;
+
+ for (d = doms; d->target_arch != NULL; d++)
+ printf("%s\n", d->target_arch);
+}
+
+static struct arch_domain *get_arch_domain(struct arch_domain *doms, const char *pers)
+{
+ struct arch_domain *d;
+
+ for (d = doms; d && d->perval >= 0; d++) {
+ if (!strcmp(pers, d->target_arch))
break;
- if (transitions[i].perval < 0)
- errx(EXIT_FAILURE, _("%s: Unrecognized architecture"), pers);
- pers_value = transitions[i].perval | options;
- if (personality(pers_value) == -EINVAL)
- return 1;
+ }
+
+ return !d || d->perval < 0 ? NULL : d;
+}
+
+static void verify_arch_domain(struct arch_domain *dom, const char *wanted)
+{
+ struct utsname un;
+
+ if (!dom || !dom->result_arch)
+ return;
+
uname(&un);
- if (transitions[i].result_arch && strcmp(un.machine, transitions[i].result_arch)) {
- if (strcmp(transitions[i].result_arch, "i386")
+ if (strcmp(un.machine, dom->result_arch)) {
+ if (strcmp(dom->result_arch, "i386")
|| (strcmp(un.machine, "i486")
&& strcmp(un.machine, "i586")
&& strcmp(un.machine, "i686")
&& strcmp(un.machine, "athlon")))
- errx(EXIT_FAILURE, _("%s: Unrecognized architecture"), pers);
+ errx(EXIT_FAILURE, _("Kernel cannot set architecture to %s"), wanted);
}
- return 0;
}
int main(int argc, char *argv[])
{
- const char *p;
+ const char *arch = NULL;
unsigned long options = 0;
int verbose = 0;
+ int archwrapper;
int c;
+ struct arch_domain *doms, *target = NULL;
+ unsigned long pers_value = 0;
+ char *shell = NULL, *shell_arg = NULL;
+
+ /* Options without equivalent short options */
+ enum {
+ OPT_4GB = CHAR_MAX + 1,
+ OPT_UNAME26,
+ OPT_LIST
+ };
- /* Options --3gb and --4gb are for compatibitity with an old
+ /* Options --3gb and --4gb are for compatibility with an old
* Debian setarch implementation. */
static const struct option longopts[] = {
{"help", no_argument, NULL, 'h'},
{"3gb", no_argument, NULL, '3'},
{"4gb", no_argument, NULL, OPT_4GB},
{"uname-2.6", no_argument, NULL, OPT_UNAME26},
+ {"list", no_argument, NULL, OPT_LIST},
{NULL, 0, NULL, 0}
};
setlocale(LC_ALL, "");
bindtextdomain(PACKAGE, LOCALEDIR);
textdomain(PACKAGE);
- atexit(close_stdout);
-
- if (argc < 1)
- show_usage(_("Not enough arguments"));
-
- p = program_invocation_short_name;
- if (!strcmp(p, "setarch")) {
- argc--;
- if (argc < 1)
- show_usage(_("Not enough arguments"));
- p = argv[1];
- argv[1] = argv[0]; /* for getopt_long() to get the program name */
- argv++;
- if (!strcmp(p, "-h") || !strcmp(p, "--help"))
- show_help();
- else if (!strcmp(p, "-V") || !strcmp(p, "--version"))
- show_version();
- else if (!strcmp(p, "--list")) {
- set_arch(argv[0], 0L, 1);
- return EXIT_SUCCESS;
- }
+ close_stdout_atexit();
+
+ if (argc < 1) {
+ warnx(_("Not enough arguments"));
+ errtryhelp(EXIT_FAILURE);
}
-#if defined(__sparc64__) || defined(__sparc__)
- if (!strcmp(p, "sparc32bash")) {
- if (set_arch(p, 0L, 0))
- err(EXIT_FAILURE, _("Failed to set personality to %s"), p);
- execl("/bin/bash", NULL);
- err(EXIT_FAILURE, _("failed to execute %s"), "/bin/bash");
+ archwrapper = strcmp(program_invocation_short_name, "setarch") != 0;
+ if (archwrapper) {
+ arch = program_invocation_short_name; /* symlinks to setarch */
+
+ /* Don't use ifdef sparc here, we get "Unrecognized architecture"
+ * error message later if necessary */
+ if (strcmp(arch, "sparc32bash") == 0) {
+ shell = "/bin/bash";
+ shell_arg = "";
+ goto set_arch;
+ }
+ } else {
+ if (1 < argc && *argv[1] != '-') {
+ arch = argv[1];
+ argv[1] = argv[0]; /* for getopt_long() to get the program name */
+ argv++;
+ argc--;
+ }
}
-#endif
while ((c = getopt_long(argc, argv, "+hVv3BFILRSTXZ", longopts, NULL)) != -1) {
switch (c) {
- case 'h':
- show_help();
- break;
- case 'V':
- show_version();
- break;
case 'v':
verbose = 1;
break;
case OPT_UNAME26:
turn_on(UNAME26, options);
break;
+ case OPT_LIST:
+ if (!archwrapper) {
+ list_arch_domains(init_arch_domains());
+ return EXIT_SUCCESS;
+ } else
+ warnx(_("unrecognized option '--list'"));
+ /* fallthrough */
+
default:
- show_usage(NULL);
+ errtryhelp(EXIT_FAILURE);
+ case 'h':
+ usage(archwrapper);
+ case 'V':
+ print_version(EXIT_SUCCESS);
}
}
+ if (!arch && !options)
+ errx(EXIT_FAILURE, _("no architecture argument or personality flags specified"));
+
argc -= optind;
argv += optind;
- if (set_arch(p, options, 0))
- err(EXIT_FAILURE, _("Failed to set personality to %s"), p);
+set_arch:
+ /* get execution domain (architecture) */
+ if (arch) {
+ doms = init_arch_domains();
+ target = get_arch_domain(doms, arch);
- /* flush all output streams before exec */
- fflush(NULL);
+ if (!target)
+ errx(EXIT_FAILURE, _("%s: Unrecognized architecture"), arch);
+ pers_value = target->perval;
+ }
+
+ /* add personality flags */
+ pers_value |= options;
+
+ /* call kernel */
+ if (personality(pers_value) < 0) {
+ /*
+ * Depending on architecture and kernel version, personality
+ * syscall is either capable or incapable of returning an error.
+ * If the return value is not an error, then it's the previous
+ * personality value, which can be an arbitrary value
+ * undistinguishable from an error value.
+ * To make things clear, a second call is needed.
+ */
+ if (personality(pers_value) < 0)
+ err(EXIT_FAILURE, _("failed to set personality to %s"), arch);
+ }
+
+ /* make sure architecture is set as expected */
+ if (arch)
+ verify_arch_domain(target, arch);
if (!argc) {
- execl("/bin/sh", "-sh", NULL);
- err(EXIT_FAILURE, _("failed to execute %s"), "/bin/sh");
+ shell = "/bin/sh";
+ shell_arg = "-sh";
+ }
+ if (verbose) {
+ printf(_("Execute command `%s'.\n"), shell ? shell : argv[0]);
+ /* flush all output streams before exec */
+ fflush(NULL);
+ }
+
+ /* Execute shell */
+ if (shell) {
+ execl(shell, shell_arg, NULL);
+ errexec(shell);
}
+ /* Execute on command line specified command */
execvp(argv[0], argv);
- err(EXIT_FAILURE, "%s", argv[0]);
- return EXIT_FAILURE;
+ errexec(argv[0]);
}
projects / thirdparty / util-linux.git / blobdiff