1 files changed, 19 insertions, 7 deletions

diff --git a/swaygrab/main.c b/swaygrab/main.c
index 63cf223f..681a6da4 100644
--- a/swaygrab/main.c
+++ b/swaygrab/main.c
@@ -10,7 +10,7 @@
 #include "ipc-client.h"
 
 void sway_terminate(void) {
-        exit(1);
+        exit(EXIT_FAILURE);
 }
 
 int numlen(int n) {
@@ -127,24 +127,33 @@ int main(int argc, char **argv) {
         init_log(L_INFO);
 
         static struct option long_options[] = {
-                {"capture", no_argument, &capture, 'c'},
+                {"help", no_argument, NULL, 'h'},
+                {"capture", no_argument, NULL, 'c'},
                 {"version", no_argument, NULL, 'v'},
                 {"socket", required_argument, NULL, 's'},
-                {"raw", no_argument, &raw, 'r'},
+                {"raw", no_argument, NULL, 'r'},
                 {"rate", required_argument, NULL, 'R'},
                 {0, 0, 0, 0}
         };
 
+        const char *usage =
+                "Usage: swaygrab [options] <output> [file]\n"
+                "\n"
+                "  -h, --help             Show help message and quit.\n"
+                "  -c, --capture          Capture video.\n"
+                "  -v, --version          Show the version number and quit.\n"
+                "  -s, --socket <socket>  Use the specified socket.\n"
+                "  -R, --rate <rate>      Specify framerate (default: 30)\n"
+                "  -r, --raw              Write raw rgba data to stdout.\n";
+
         int c;
         while (1) {
                 int option_index = 0;
-                c = getopt_long(argc, argv, "cvs:r", long_options, &option_index);
+                c = getopt_long(argc, argv, "hcvs:r", long_options, &option_index);
                 if (c == -1) {
                         break;
                 }
                 switch (c) {
-                case 0: // Flag
-                        break;
                 case 's': // Socket
                         socket_path = strdup(optarg);
                         break;
@@ -163,8 +172,11 @@ int main(int argc, char **argv) {
 #else
                         fprintf(stdout, "version not detected\n");
 #endif
-                        exit(0);
+                        exit(EXIT_SUCCESS);
                         break;
+                default:
+                        fprintf(stderr, "%s", usage);
+                        exit(EXIT_FAILURE);
                 }
         }