fdcheck.c

/* ************************************************************************** */
/*                                                                            */
/*                                                           :      .         */
/*   fdcheck.c                                        -=-:::+*+:-+*#.         */
/*                                                :-:::+#***********----:     */
/*   By: csteenvo <csteenvo@student.codam.n>        .:-*#************#-       */
/*                                                 :=+*+=+*********####+:     */
/*   Created: 2022/05/10 11:58:54 by csteenvo     ..     +**=-=***-           */
/*   Updated: 2022/05/10 11:58:54 by csteenvo            :      ..            */
/*                                                                            */
/* ************************************************************************** */

#include <stdio.h>

#include <fcntl.h>
#include <limits.h>
#include <errno.h>

int
	main(void)
{
	int	i;
	int	count;

	count = 0;
	i = 0;
	while (i < OPEN_MAX)
	{
		if (fcntl(i, F_GETFD) < 0)
		{
			if (errno != EBADF)
				fprintf(stderr, "Error\n");
		}
		else
		{
			printf("%d OPEN; ", i);
			count++;
		}
		i++;
	}
	printf("\n%d/%d open\n", count, OPEN_MAX);
	return (0);
}