| /* |
| * ctrlaltdel.c - Set the function of the Ctrl-Alt-Del combination |
| * Created 4-Jul-92 by Peter Orbaek <poe@daimi.aau.dk> |
| * 1999-02-22 Arkadiusz MiĆkiewicz <misiek@pld.ORG.PL> |
| * - added Native Language Support |
| */ |
| |
| #include <getopt.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <errno.h> |
| #include <unistd.h> |
| #include <sys/reboot.h> |
| #include "nls.h" |
| #include "c.h" |
| #include "closestream.h" |
| #include "pathnames.h" |
| #include "path.h" |
| |
| #define LINUX_REBOOT_CMD_CAD_ON 0x89ABCDEF |
| #define LINUX_REBOOT_CMD_CAD_OFF 0x00000000 |
| |
| static void __attribute__ ((__noreturn__)) usage(FILE * out) |
| { |
| fprintf(out, USAGE_HEADER); |
| fprintf(out, _(" %s hard|soft\n"), program_invocation_short_name); |
| |
| fprintf(out, USAGE_SEPARATOR); |
| fprintf(out, _("Set the function of the Ctrl-Alt-Del combination.\n")); |
| |
| fprintf(out, USAGE_OPTIONS); |
| fprintf(out, USAGE_HELP); |
| fprintf(out, USAGE_VERSION); |
| fprintf(out, USAGE_MAN_TAIL("ctrlaltdel(8)")); |
| exit(out == stderr ? EXIT_FAILURE : EXIT_SUCCESS); |
| } |
| |
| static int get_cad(void) |
| { |
| uint64_t val = path_read_u64(_PATH_PROC_CTRL_ALT_DEL); |
| |
| switch (val) { |
| case 0: |
| fputs("soft\n", stdout); |
| break; |
| case 1: |
| fputs("hard\n", stdout); |
| break; |
| default: |
| printf("%s hard\n", _("implicit")); |
| warnx(_("unexpected value in %s: %ju"), _PATH_PROC_CTRL_ALT_DEL, val); |
| return EXIT_FAILURE; |
| } |
| return EXIT_SUCCESS; |
| } |
| |
| static int set_cad(const char *arg) |
| { |
| unsigned int cmd; |
| |
| if (geteuid()) { |
| warnx(_("You must be root to set the Ctrl-Alt-Del behavior")); |
| return EXIT_FAILURE; |
| } |
| if (!strcmp("hard", arg)) |
| cmd = LINUX_REBOOT_CMD_CAD_ON; |
| else if (!strcmp("soft", arg)) |
| cmd = LINUX_REBOOT_CMD_CAD_OFF; |
| else { |
| warnx(_("unknown argument: %s"), arg); |
| return EXIT_FAILURE; |
| } |
| if (reboot(cmd) < 0) { |
| warnx("reboot"); |
| return EXIT_FAILURE; |
| } |
| return EXIT_SUCCESS; |
| } |
| |
| int main(int argc, char **argv) |
| { |
| int ch, ret; |
| static const struct option longopts[] = { |
| {"version", no_argument, NULL, 'V'}, |
| {"help", no_argument, NULL, 'h'}, |
| {NULL, 0, NULL, 0} |
| }; |
| |
| setlocale(LC_ALL, ""); |
| bindtextdomain(PACKAGE, LOCALEDIR); |
| textdomain(PACKAGE); |
| atexit(close_stdout); |
| |
| while ((ch = getopt_long(argc, argv, "Vh", longopts, NULL)) != -1) |
| switch (ch) { |
| case 'V': |
| printf(UTIL_LINUX_VERSION); |
| return EXIT_SUCCESS; |
| case 'h': |
| usage(stdout); |
| default: |
| errtryhelp(EXIT_FAILURE); |
| } |
| |
| if (argc < 2) |
| ret = get_cad(); |
| else |
| ret = set_cad(argv[1]); |
| return ret; |
| } |