#include <stdio.h>
#include <errno.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>

long parse_long(const char *str) {
	char *ptr = NULL;
	long value = strtol(str, &ptr, 10);

	if (*ptr) {
		fprintf(stderr, "mkfifo: not a number: %s\n", str);
		exit(1);
	}

	else if (value < 1) {
		fprintf(stderr, "mknod: number is negative: %s\n", str);
		exit(1);
	}

	return value;
}

int main(int argc, char **argv) {
	mode_t mode = 0666;

	int opt;
	while ((opt = getopt(argc, argv, "m:")) != -1) {
		switch (opt) {
			case 'm':
				mode = parse_long(optarg);
				break;

			default:
				printf("mkfifo [m] [file1 file2...]\n\t-m MODE\n");
				return 0;
		}
	}

	argv += optind;
	argc -= optind;

	for (int i = 0; i < argc; i++) {
		if (mkfifo(argv[i], mode)) {
			fprintf(stderr, "mkfifo: %s %s\n", argv[i], strerror(errno));
			return 1;
		}
	}

	return 0;
}