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swaygrab: Print usage and exit on unknown options

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This commit is contained in:
Christoph Gysin 2015-11-28 16:09:14 +02:00
parent e48a16ce5e
commit b235ccd212
1 changed files with 12 additions and 0 deletions
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12
swaygrab/main.c
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@ -135,6 +135,15 @@ int main(int argc, char **argv) {
{0, 0, 0, 0} {0, 0, 0, 0}
}; };
const char *usage =
"Usage: swaygrab [options] <output> [file]\n"
"\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; int c;
while (1) { while (1) {
int option_index = 0; int option_index = 0;
@ -165,6 +174,9 @@ int main(int argc, char **argv) {
#endif #endif
exit(EXIT_SUCCESS); exit(EXIT_SUCCESS);
break; break;
default:
fprintf(stderr, "%s", usage);
exit(EXIT_FAILURE);
} }
} }