usage(): return success if -h is called && print more appropriate usage, opts can...

diff --git a/slstatus.c b/slstatus.c
index 6a338f99d3e1128bd95d736bf5e824bdf3ee7600..1f0851455cef36d3e3135f33d41fff5d7d995f86 100644 (file)
--- a/slstatus.c
+++ b/slstatus.c
@@ -70,7 +70,7 @@ static char *wifi_perc(const char *iface);
 static char *wifi_essid(const char *iface);
 static char *kernel_release(void);
 static void sighandler(const int signo);
-static void usage(void);
+static void usage(int);
 
 char *argv0;
 char concat[];
@@ -756,10 +756,10 @@ sighandler(const int signo)
 }
 
 static void
-usage(void)
+usage(int eval)
 {
-       fprintf(stderr, "usage: %s [-dhov]\n", argv0);
-       exit(1);
+       fprintf(stderr, "usage: %s [-d] [-o] [-v] [-h]\n", argv0);
+       exit(eval);
 }
 
 int
@@ -781,12 +781,14 @@ main(int argc, char *argv[])
                case 'v':
                        printf("slstatus %s (C) 2016 slstatus engineers\n", VERSION);
                        return 0;
+               case 'h':
+                       usage(0);
                default:
-                       usage();
+                       usage(1);
        } ARGEND
 
        if (dflag && oflag) {
-               usage();
+               usage(1);
        }
        if (dflag && daemon(1, 1) < 0) {
                err(1, "daemon");