Show HN: c(github.com)

    #include <stdbool.h>

    typedef int bool;
    #define true 1
    #define false 0

    char * s = malloc(snprintf(NULL, 0, "%s/%s", cwd, argv[1]) + 1);
    sprintf(s, "%s/%s", cwd, argv[1]);

    The glibc implementation of the functions snprintf() and vsnprintf() conforms
    to the C99 standard, that is, behaves as described above, since glibc version
    2.1.  Until glibc 2.0.6 they would return -1 when the output was truncated.

    bool dirOrFileExists(const char dir[]) {
	struct stat st;
	if (stat(dir, &st) == 0) {
		return true;
	}
	else {
		return false;
	}
    }

    while((entry = readdir(mydir)))

    int fileOrDirectory(const char path[]) {
	struct stat s;

	if (stat(path, &s) == 0) {
		if (s.st_mode & S_IFDIR) {
			// Is a directory
			return 0;
		} else if (s.st_mode & S_IFREG) {
			// Is a file
			return 1;
		} else {
			// Something else
			return -1;
		}
	}
	else {
		// Error
		printf("Error occurred\n");
	}
    }

    while (1) {
	ch = fgetc(fp);
	newch[i] = ch;
	if (ch == EOF) {
		newch[i] = '\0';
		break;
	}
	i++;
    }

    And those on Mac should be able to use:
    
    $ brew install c

    if (getcwd(cwd, sizeof(cwd)) != NULL)
        ;
    else
        perror("getcwd() error");

    if (... == NULL) {
        perror(...);
    }