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| author | Sami Kerola | 2011-08-31 20:52:01 +0200 |
|---|---|---|
| committer | Sami Kerola | 2011-09-17 14:25:20 +0200 |
| commit | 028f7ed83f92105b39ee0c8e3ffdb89157c182de (patch) | |
| tree | 62e929415e812321dedb359a58d3556c7dbf3b99 /sys-utils/ctrlaltdel.c | |
| parent | docs: mention long options in pivot_root.8 (diff) | |
| download | kernel-qcow2-util-linux-028f7ed83f92105b39ee0c8e3ffdb89157c182de.tar.gz kernel-qcow2-util-linux-028f7ed83f92105b39ee0c8e3ffdb89157c182de.tar.xz kernel-qcow2-util-linux-028f7ed83f92105b39ee0c8e3ffdb89157c182de.zip | |
ctrlaltdel: add version & help options
Including other necessary changes to usage().
Signed-off-by: Sami Kerola <kerolasa@iki.fi>
Diffstat (limited to 'sys-utils/ctrlaltdel.c')
| -rw-r--r-- | sys-utils/ctrlaltdel.c | 39 |
1 files changed, 35 insertions, 4 deletions
diff --git a/sys-utils/ctrlaltdel.c b/sys-utils/ctrlaltdel.c index d6c83b42f..8805435d4 100644 --- a/sys-utils/ctrlaltdel.c +++ b/sys-utils/ctrlaltdel.c @@ -5,6 +5,7 @@ * - added Native Language Support */ +#include <getopt.h> #include <stdio.h> #include <stdlib.h> #include <string.h> @@ -13,12 +14,42 @@ #include "nls.h" #include "c.h" -int main(int argc, char *argv[]) +static void __attribute__ ((__noreturn__)) usage(FILE * out) { + fprintf(out, USAGE_HEADER); + fprintf(out, _(" %s <hard|soft>\n"), program_invocation_short_name); + fprintf(out, USAGE_OPTIONS); + fprintf(out, USAGE_HELP); + fprintf(out, USAGE_VERSION); + fprintf(out, USAGE_BEGIN_TAIL); + fprintf(out, USAGE_MAN_TAIL, "ctrlaltdel(8)"); + exit(out == stderr ? EXIT_FAILURE : EXIT_SUCCESS); +} + +int main(int argc, char **argv) +{ + int ch; + 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); + 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: + usage(stderr); + } + if (geteuid()) errx(EXIT_FAILURE, _("You must be root to set the Ctrl-Alt-Del behaviour")); @@ -29,9 +60,9 @@ int main(int argc, char *argv[]) } else if (argc == 2 && !strcmp("soft", argv[1])) { if (my_reboot(LINUX_REBOOT_CMD_CAD_OFF) < 0) err(EXIT_FAILURE, "reboot"); - } else - errx(EXIT_FAILURE, _("Usage: %s hard|soft"), - program_invocation_short_name); + } else { + usage(stderr); + } return EXIT_SUCCESS; } |