misc: cosmetics, remove argument from usage(FILE*)

[thirdparty/util-linux.git] / sys-utils / ctrlaltdel.c

diff --git a/sys-utils/ctrlaltdel.c b/sys-utils/ctrlaltdel.c
index c754fd0589f67a76a9da23324aac42b5d4a1344b..98c8ed83282df744734b5865449e0dab0fccef2e 100644 (file)
--- a/sys-utils/ctrlaltdel.c
+++ b/sys-utils/ctrlaltdel.c
@@ -1,38 +1,112 @@
 /*
  * ctrlaltdel.c - Set the function of the Ctrl-Alt-Del combination
  * Created 4-Jul-92 by Peter Orbaek <poe@daimi.aau.dk>
- * ftp://ftp.daimi.aau.dk/pub/linux/poe/
+ * 1999-02-22 Arkadiusz Miśkiewicz <misiek@pld.ORG.PL>
+ * - added Native Language Support
  */
 
+#include <getopt.h>
 #include <stdio.h>
-#include <unistd.h>
+#include <stdlib.h>
 #include <string.h>
-#include "linux_reboot.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
 
-int
-main(int argc, char *argv[]) {
+static void __attribute__((__noreturn__)) usage(void)
+{
+       FILE *out = stdout;
+       fputs(USAGE_HEADER, out);
+       fprintf(out, _(" %s hard|soft\n"), program_invocation_short_name);
 
-       if(geteuid()) {
-               fprintf(stderr,
-                   "You must be root to set the Ctrl-Alt-Del behaviour.\n");
-               exit(1);
+       fputs(USAGE_SEPARATOR, out);
+       fprintf(out, _("Set the function of the Ctrl-Alt-Del combination.\n"));
+
+       fputs(USAGE_OPTIONS, out);
+       fputs(USAGE_HELP, out);
+       fputs(USAGE_VERSION,out);
+       fprintf(out, USAGE_MAN_TAIL("ctrlaltdel(8)"));
+       exit(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;
+}
 
-       if(argc == 2 && !strcmp("hard", argv[1])) {
-               if(my_reboot(LINUX_REBOOT_CMD_CAD_ON) < 0) {
-                       perror("ctrlaltdel: reboot");
-                       exit(1);
-               }
-       } else if(argc == 2 && !strcmp("soft", argv[1])) {
-               if(my_reboot(LINUX_REBOOT_CMD_CAD_OFF) < 0) {
-                       perror("ctrlaltdel: reboot");
-                       exit(1);
-               }
-       } else {
-               fprintf(stderr, "Usage: ctrlaltdel hard|soft\n");
-               exit(1);
+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;
        }
-       exit(0);
+       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();
+               default:
+                       errtryhelp(EXIT_FAILURE);
+               }
+
+       if (argc < 2)
+               ret = get_cad();
+       else
+               ret = set_cad(argv[1]);
+       return ret;
+}