print usage if input or output is not set
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1 changed files with 2 additions and 2 deletions
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@ -67,7 +67,7 @@ typedef struct _oxstate {
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static void usage(void){
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static void usage(void){
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fprintf(stderr,
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fprintf(stderr,
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"Usage: oxframe [options]\n\n"
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"Usage: oxframe -i <input> -o <output> [options]\n\n"
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"Options: \n\n"
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"Options: \n\n"
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" -h, --help show this help message and exit\n"
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" -h, --help show this help message and exit\n"
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" -x WIDTH, --width=WIDTH\n"
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" -x WIDTH, --width=WIDTH\n"
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@ -538,7 +538,7 @@ int main (int argc, char * argv[]) {
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}
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}
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}
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}
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if(argc < 3) {
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if(argc < 3 || state.input == NULL || state.output == NULL) {
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usage();
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usage();
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}
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}
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