sway: Add --help option that prints usage

1 files changed, 7 insertions, 1 deletions

diff --git a/sway/main.c b/sway/main.c
index 7b24d405..473a0990 100644
--- a/sway/main.c
+++ b/sway/main.c
@@ -55,6 +55,7 @@ int main(int argc, char **argv) {
         static int verbose = 0, debug = 0, validate = 0;
 
         static struct option long_options[] = {
+                {"help", no_argument, NULL, 'h'},
                 {"config", required_argument, NULL, 'c'},
                 {"validate", no_argument, &validate, 1},
                 {"debug", no_argument, &debug, 1},
@@ -69,6 +70,7 @@ int main(int argc, char **argv) {
         const char* usage =
                 "Usage: sway [options] [command]\n"
                 "\n"
+                "  -h, --help             Show help message and quit.\n"
                 "  -c, --config <config>  Specify a config file.\n"
                 "  -C, --validate         Check the validity of the config file, then exit.\n"
                 "  -d, --debug            Enables full logging, including debug information.\n"
@@ -80,13 +82,17 @@ int main(int argc, char **argv) {
         int c;
         while (1) {
                 int option_index = 0;
-                c = getopt_long(argc, argv, "CdvVpc:", long_options, &option_index);
+                c = getopt_long(argc, argv, "hCdvVpc:", long_options, &option_index);
                 if (c == -1) {
                         break;
                 }
                 switch (c) {
                 case 0: // Flag
                         break;
+                case 'h': // help
+                        fprintf(stdout, "%s", usage);
+                        exit(EXIT_SUCCESS);
+                        break;
                 case 'c': // config
                         config_path = strdup(optarg);
                         break;