sys-utils/ctrlaltdel.c

   1 /*
   2  * ctrlaltdel.c - Set the function of the Ctrl-Alt-Del combination
   3  * Created 4-Jul-92 by Peter Orbaek <poe@daimi.aau.dk>
   4  * 1999-02-22 Arkadiusz Mi¶kiewicz <misiek@pld.ORG.PL>
   5  * - added Native Language Support
   6  */
   7
   8 #include <getopt.h>
   9 #include <stdio.h>
  10 #include <stdlib.h>
  11 #include <string.h>
  12 #include <errno.h>
  13 #include "linux_reboot.h"
  14 #include "nls.h"
  15 #include "c.h"
  16 #include "closestream.h"
  17
  18 static void __attribute__ ((__noreturn__)) usage(FILE * out)
  19 {
  20         fprintf(out, USAGE_HEADER);
  21         fprintf(out, _(" %s <hard|soft>\n"), program_invocation_short_name);
  22         fprintf(out, USAGE_OPTIONS);
  23         fprintf(out, USAGE_HELP);
  24         fprintf(out, USAGE_VERSION);
  25         fprintf(out, USAGE_MAN_TAIL("ctrlaltdel(8)"));
  26         exit(out == stderr ? EXIT_FAILURE : EXIT_SUCCESS);
  27 }
  28
  29 int main(int argc, char **argv)
  30 {
  31         int ch;
  32         static const struct option longopts[] = {
  33                 {"version", no_argument, NULL, 'V'},
  34                 {"help", no_argument, NULL, 'h'},
  35                 {NULL, 0, NULL, 0}
  36         };
  37
  38         setlocale(LC_ALL, "");
  39         bindtextdomain(PACKAGE, LOCALEDIR);
  40         textdomain(PACKAGE);
  41         atexit(close_stdout);
  42
  43         while ((ch = getopt_long(argc, argv, "Vh", longopts, NULL)) != -1)
  44                 switch (ch) {
  45                 case 'V':
  46                         printf(UTIL_LINUX_VERSION);
  47                         return EXIT_SUCCESS;
  48                 case 'h':
  49                         usage(stdout);
  50                 default:
  51                         usage(stderr);
  52                 }
  53
  54         if (geteuid())
  55                 errx(EXIT_FAILURE,
  56                      _("You must be root to set the Ctrl-Alt-Del behaviour"));
  57
  58         if (argc == 2 && !strcmp("hard", argv[1])) {
  59                 if (my_reboot(LINUX_REBOOT_CMD_CAD_ON) < 0)
  60                         err(EXIT_FAILURE, "reboot");
  61         } else if (argc == 2 && !strcmp("soft", argv[1])) {
  62                 if (my_reboot(LINUX_REBOOT_CMD_CAD_OFF) < 0)
  63                         err(EXIT_FAILURE, "reboot");
  64         } else {
  65                 usage(stderr);
  66         }
  67
  68         return EXIT_SUCCESS;
  69 }