sulogin: use a more standard usage output

Signed-off-by: Dave Reisner <dreisner@archlinux.org>

diff --git a/login-utils/sulogin.c b/login-utils/sulogin.c
index def733658fc61eaa23052d125b3d35edd9f05988..628329cc439c063d969b9c8d9746136d5805c201 100644 (file)
--- a/login-utils/sulogin.c
+++ b/login-utils/sulogin.c
@@ -50,6 +50,8 @@
 #  include <selinux/get_context_list.h>
 #endif
 
+#include "c.h"
+#include "nls.h"
 #include "pathnames.h"
 
 static int timeout;
@@ -398,9 +400,20 @@ static void sushell(struct passwd *pwd)
        perror("/bin/sh");
 }
 
-static void usage(void)
+static void usage(FILE *out)
 {
-       fprintf(stderr, "Usage: sulogin [-e] [-p] [-t timeout] [tty device]\n");
+       fprintf(out, USAGE_HEADER);
+       fprintf(out, _(
+                       " %s [options] [tty device]\n"), program_invocation_short_name);
+
+       fprintf(out, USAGE_OPTIONS);
+       fprintf(out, _(
+                       " -p        start a login shell\n"
+                       " -t SEC    set max time to wait for a password (default: no limit)\n"
+                       " -e        examine shadow files directly if getpwnam(3) fails\n"
+                       " -h        display this help message\n"));
+
+       fprintf(out, _("\nFor more information see sulogin(8).\n"));
 }
 
 int main(int argc, char **argv)
@@ -417,7 +430,7 @@ int main(int argc, char **argv)
         *      See if we have a timeout flag.
         */
        opterr = 0;
-       while ((c = getopt(argc, argv, "ept:")) != EOF) {
+       while ((c = getopt(argc, argv, "ehpt:")) != EOF) {
                switch(c) {
                case 't':
                        timeout = atoi(optarg);
@@ -428,8 +441,11 @@ int main(int argc, char **argv)
                case 'e':
                        opt_e = 1;
                        break;
+               case 'h':
+                       usage(stdout);
+                       return 0;
                default:
-                       usage();
+                       usage(stderr);
                        /* Do not exit! */
                        break;
                }