Question

When I run my CLI program on my iphone i get a Segment fault: 11 error. I dunno what to do, I’m a noob at C.

int main (int argc, const char * argv[])
{
if (argc > 1 && (!strcmp(argv[1],"--help") || !strcmp(argv[1],"-h"))) {

    printf("#### redhai 1.2 ####\n");
    printf("-j Jailbreak\n");
    printf("-i Device info\n");
    printf("-a About\n");
    printf("*END OF HELP*\n");
    printf("####################\n");
    return 0;
}else if (!strcmp(argv[1],"-j")) {
    printf("Coding the jailbreak portion!\n");
    return 0;
}
return 0;
}

Answer 1

You are accessing argv[1] without first checking if it exists. You need to first check if argc > 1.

} else if (argc > 1 && !strcmp(argv[1],"-j")) {
//         ^^^^^^^^^^^^