swaymsg: Print usage and exit on unknown options

1 files changed, 11 insertions, 0 deletions

diff --git a/swaymsg/main.c b/swaymsg/main.c
index e629bcc2..2f2e843a 100644
--- a/swaymsg/main.c
+++ b/swaymsg/main.c
@@ -30,6 +30,14 @@ int main(int argc, char **argv) {
                 {0, 0, 0, 0}
         };
 
+        const char *usage =
+                "Usage: swaymsg [options] [message]\n"
+                "\n"
+                "  -q, --quiet            Be quiet.\n"
+                "  -v, --version          Show the version number and quit.\n"
+                "  -s, --socket <socket>  Use the specified socket.\n"
+                "  -t, --type <type>      Specify the message type.\n";
+
         int c;
         while (1) {
                 int option_index = 0;
@@ -54,6 +62,9 @@ int main(int argc, char **argv) {
 #endif
                         exit(EXIT_SUCCESS);
                         break;
+                default:
+                        fprintf(stderr, "%s", usage);
+                        exit(EXIT_FAILURE);
                 }
         }