#include <stdlib.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>

int main(void)
{
	mode_t a;

	a = umask(0);
	printf("mask = %o (oct), %x (hex), %d (dec)\n", a, a, a);

	if (creat("foo", S_IRUSR | S_IRGRP | S_IROTH) < 0) {
		perror("failed to create: ");
		// printf("failed to create.\n");
		exit(EXIT_FAILURE);
	}
	return(EXIT_SUCCESS);
}