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

int main(int argc, const char* argv[]) {

	const int BUF_SIZE = 10;
	char buf[10];
	int ret;

	char* cwd = getcwd(buf, BUF_SIZE);
	if(cwd != buf) {
		printf("failed to getcwd\n");
		return -1;
	}

	const char expect_cwd[] = "/";
	if(strcmp(buf, expect_cwd)) {
		printf("incorrect cwd \"%s\". expect \"%s\".\n", buf, expect_cwd);
		return -1;
	}

	const char DIR_NAME[] = "test_dir";
	const char DIR_PATH[] = "/test_dir";
	const int DIR_MODE = 0664;
	ret = mkdir(DIR_NAME, DIR_MODE);
	if(ret < 0) {
		printf("failed to mkdir \"%s\"", DIR_NAME);
		return ret;
	}

	ret = chdir(DIR_NAME);
	if(ret < 0) {
		printf("failed to chdir to \"%s\"", DIR_NAME);
		return ret;
	}

	cwd = getcwd(buf, BUF_SIZE);
	if(cwd != buf) {
		printf("failed to getcwd\n");
		return -1;
	}

	if(strcmp(buf, DIR_PATH)) {
		printf("incorrect cwd \"%s\". expect \"%s\".\n", buf, DIR_PATH);
		return -1;
	}

	ret = rmdir(DIR_PATH);
	if(ret < 0) {
		printf("failed to rmdir \"%s\"", DIR_PATH);
		return ret;
	}

	struct stat stat_buf;
	ret = stat(DIR_PATH, &stat_buf);
	if(!(ret < 0 && errno == ENOENT)) {
		printf("stat on \"%s\" should return ENOENT", DIR_PATH);
		return ret;
	}

    printf("getcwd, mkdir, rmdir, chdir test successful\n");
    return 0;
}