micro-utils/coreutils/mkdir.c

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

int do_mkdir(const char *path) {
	if (mkdir(path, 0777)) {
		fprintf(stderr, "mkdir: %s %s\n", path, strerror(errno));
		return 1;
	}

	return 0;
}

int do_parents(const char *path) {
	if (path[0] == '.' || path[0] == '/')
		return 0;

	char *path2 = strdup(path);
	if (!path2) {
		fprintf(stderr, "mkdir: %s: %s\n", path, strerror(errno));
		return 1;
	}

	const char *par = dirname(path2);
	do_parents(par);
	do_mkdir(path2);

	free(path2);
	return 0;
}

int main(int argc, char **argv) {
	unsigned int p_flag = 0;

	int opt;
	while ((opt = getopt(argc, argv, "p")) != -1) {
		switch (opt) {
			case 'p':
				p_flag = 1;
				break;

			default:
				printf("mkdir [dst1 dst2...]\n\t[-p Make parent dir]\n");
				return 0;
		}
	}

	argv += optind;
	argc -= optind;

	for (int i = 0; i < argc; i++) {
		if (p_flag) {
			if (do_parents(argv[i]))
				return 1;
		}

		else {
			if (do_mkdir(argv[i]))
				return 1;
		}
	}

	return 0;
}