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