#include "crypt.h"

#define OPTSTRING "h"
#define USAGE "USAGE: crypt KEY SALT"

/**
 * crypt(1) - Simple shell script frontend to crypt(3), because I'm tired of
 * fighting with mkpasswd(1).
 *
 * Author: Tom Ryder <tom\@sanctum.geek.nz>
 * Copyright: 2015
 * License: MIT
 */
int main (int argc, char **argv)
{
    /* The hash we will produce, hopefully */
    char *hash = NULL;

    /* Assume user doesn't want help */
    int help = 0;

    /* Iterate through any options */
    int o;
    while ((o = getopt(argc, argv, OPTSTRING)) != -1) {
        switch (o) {
            case 'h':
                help = 1;
                break;
            case '?':
                fprintf(stderr, "Unknown option\n");
                break;
            default:
                abort();
        }
    }

    /* If help was asked, give it */
    if (help) {
        fprintf(stdout, "%s\n", USAGE);
        exit(EXIT_SUCCESS);
    }

    /* If we don't have three arguments, bail */
    if (argc != 3) {
        fprintf(stderr, "%s\n", USAGE);
        exit(EXIT_FAILURE);
    }

    /* All seems well, build the hash and print it */
    hash = crypt(argv[1], argv[2]);
    fprintf(stdout, "%s\n", hash);
    exit(EXIT_SUCCESS);
}