From b235ccd212920db7e444716b7a36fcb4a36a3644 Mon Sep 17 00:00:00 2001 From: Christoph Gysin Date: Sat, 28 Nov 2015 16:09:14 +0200 Subject: [PATCH] swaygrab: Print usage and exit on unknown options --- swaygrab/main.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/swaygrab/main.c b/swaygrab/main.c index e60d154f..90d118e2 100644 --- a/swaygrab/main.c +++ b/swaygrab/main.c @@ -135,6 +135,15 @@ int main(int argc, char **argv) { {0, 0, 0, 0} }; + const char *usage = + "Usage: swaygrab [options] [file]\n" + "\n" + " -c, --capture Capture video.\n" + " -v, --version Show the version number and quit.\n" + " -s, --socket Use the specified socket.\n" + " -R, --rate Specify framerate (default: 30)\n" + " -r, --raw Write raw rgba data to stdout.\n"; + int c; while (1) { int option_index = 0; @@ -165,6 +174,9 @@ int main(int argc, char **argv) { #endif exit(EXIT_SUCCESS); break; + default: + fprintf(stderr, "%s", usage); + exit(EXIT_FAILURE); } }