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/*-
* Copyright (c) 2004 Robert N. M. Watson
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#define LOOPS 500
/*
* This test is intended to detect a leak of a file descriptor in the process
* following a failed non-blocking accept. It measures an available fd
* baseline, then performs 1000 failing accepts, then checks to see what the
* next fd is. It relies on sequential fd allocation, and will test for it
* briefly before beginning (not 100% reliable, but a good start).
*/
int
main(int argc, char *argv[])
{
struct sockaddr_in sin;
socklen_t size;
int fd1, fd2, fd3, i, s;
/*
* Check for sequential fd allocation, and give up early if not.
*/
fd1 = dup(STDIN_FILENO);
fd2 = dup(STDIN_FILENO);
if (fd2 != fd1 + 1)
errx(-1, "Non-sequential fd allocation\n");
s = socket(PF_INET, SOCK_STREAM, 0);
if (s == -1)
errx(-1, "socket: %s", strerror(errno));
bzero(&sin, sizeof(sin));
sin.sin_len = sizeof(sin);
sin.sin_family = AF_INET;
sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
sin.sin_port = htons(8080);
if (bind(s, (struct sockaddr *) &sin, sizeof(sin)) != 0)
errx(-1, "bind: %s", strerror(errno));
if (listen(s, -1) != 0)
errx(-1, "listen: %s", strerror(errno));
i = fcntl(s, F_GETFL);
if (i == -1)
errx(-1, "ioctl(F_GETFL): %s", strerror(errno));
i |= O_NONBLOCK;
if (fcntl(s, F_SETFL, i) != 0)
errx(-1, "ioctl(F_SETFL): %s", strerror(errno));
i = fcntl(s, F_GETFL);
if (i == -1)
errx(-1, "ioctl(F_GETFL): %s", strerror(errno));
if ((i & O_NONBLOCK) != O_NONBLOCK)
errx(-1, "Failed to set O_NONBLOCK (i=0x%x)\n", i);
for (i = 0; i < LOOPS; i++) {
size = sizeof(sin);
if (accept(s, (struct sockaddr *)&sin, &size) != -1)
errx(-1, "accept succeeded\n");
if (errno != EAGAIN)
errx(-1, "accept: %s", strerror(errno));
}
/*
* Allocate a file descriptor and make sure it's fd2+2. 2 because
* we allocate an fd for the socket.
*/
fd3 = dup(STDIN_FILENO);
if (fd3 != fd2 + 2)
errx(-1, "FAIL (%d, %d, %d)\n", fd1, fd2, fd3);
else
fprintf(stderr, "PASS\n");
return (0);
}
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