#include <stdio.h>
#include <errno.h>
#include <fcntl.h>
#include <libgen.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>

int move(const char *src, const char *dst) {
	char *copy = strdup(src);
	if (!copy)
		return 1;

	char *bname = basename(copy);

	size_t len = strlen(dst) + strlen(bname) + 2;
	char *new_path = malloc(len + 1);
	if (new_path == NULL)
		return 1;

	snprintf(new_path, len, "%s/%s", dst, bname);

	int ret = 0;
	if (rename(src, new_path) < 0)
		ret = 1;

	free(new_path);
	free(copy);

	return ret;
}

int main(const int argc, const char **argv) {
	if (argc <= 2 || !strcmp(argv[argc - 1], "--help")) {
		printf("mv [Src1 src2...] [Dst]\n");
		return 0;
	}

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

	return 0;
}