/* Bug #22517 */
#define _GNU_SOURCE
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <errno.h>
#include <error.h>
#include <fcntl.h>

int main(void) {
	union {
		int pipefd[2];
		struct {
			int readfd;
			int writefd;
		};
	} p;
	int r;
	int i;
	r = pipe2(p.pipefd, O_NONBLOCK);
	if (r) {
		error(r, errno, "Failed to create pipe()\n");
		return EXIT_FAILURE;
	}
	for (i = 0;; i++) {
		do {
			r = write(p.writefd, " ", 1);
		} while (r == -1 && errno == EINTR); /* interrupted by signal */
		if (r == -1 && errno == EWOULDBLOCK) {
			printf("%d\n", i);
			return EXIT_SUCCESS;
		}
		if (r != 1) {
			error(r, errno, "Failed to write()\n");
			return EXIT_FAILURE;
		}
	}
}