/* Copyright (c) 2021 Ben Fuller
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the “Software”),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:

 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
 * NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
 * USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

#include <unistd.h>
#include <stdio.h>
#include <sys/stat.h>
#include <fcntl.h>

#define BUF_SIZE 1000

static void usage(const char *name) {
    fprintf(stderr, "usage: %s [-d] [FILE]\n", name);
}

char *base64(char *input, unsigned dflg){
    return input;
}

int main(int argc, char **argv) {

    int c;
    unsigned dflg = 0;
    const char *name = argv[0];
    while ((c = getopt(argc, argv, "dh")) != -1) {
        switch(c) {
            case 'd':
                dflg++;
                break;
            case 'h':
                usage(name);
                return 0;
                break;
            case '?':
                usage(name);
                return 2;
                break;
        }
    }
    int fd;
    if (optind == argc) {
        base64(STDIN_FILENO, dflg);
    } else {
        for (; optind < argc; optind++) {
            if (*argv[optind] == '-') {
                fd = STDIN_FILENO;
            } else {
                if ((fd = open(argv[optind], O_RDONLY)) == -1 ) {
                    perror(argv[optind]);
                    return 1;
                }
            }
            char buf[BUF_SIZE] = {'\0'};
            if (read(fd, buf, BUF_SIZE) == -1 ) {
                perror("read");
                return 1;
            }
            printf("%s\n", buf);

            if (close(fd) != 0) {
                perror("close");
                return 1;
            }
        }
    }


    return 0;

}