dev/c/fopen_too_many_files/fopen_too_many_files.c

#include <stdio.h>
#include <stdlib.h>

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

	for (i = 0; i < 65536; i++)
		if (!fopen("fopen_too_many_files.c", "rb")) {
			printf("ulimit = %d\n", i);
			break;
		}

	printf("Hello, world!\n");

	return EXIT_SUCCESS;
}