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/* $OpenBSD: close.c,v 1.3 2002/02/15 23:36:52 marc Exp $ */
/*
* Copyright (c) 1993, 1994, 1995, 1996 by Chris Provenzano and contributors,
* proven@mit.edu 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Chris Provenzano,
* the University of California, Berkeley, and contributors.
* 4. Neither the name of Chris Provenzano, the University, nor the names of
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY CHRIS PROVENZANO 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 CHRIS PROVENZANO, THE REGENTS 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.
*/
/*
* Test the semantics of close() while a select() is happening.
* Not a great test.
*/
#include <pthread.h>
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include "test.h"
#define BUFSIZE 4096
int fd;
/*
* meat of inetd discard service -- ignore data
*/
void
discard(int s)
{
char buffer[BUFSIZE];
while ((errno = 0, read(s, buffer, sizeof(buffer)) > 0) ||
errno == EINTR)
;
}
/*
* Listen on localhost:TEST_PORT for a connection
*/
#define TEST_PORT 9876
void
server(void)
{
int sock;
int client;
int client_addr_len;
struct sockaddr_in serv_addr;
struct sockaddr client_addr;
CHECKe(sock = socket(AF_INET, SOCK_STREAM, 0));
bzero((char *) &serv_addr, sizeof serv_addr);
serv_addr.sin_family = AF_INET;
serv_addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
serv_addr.sin_port = htons(TEST_PORT);
CHECKe(bind(sock, (struct sockaddr *) &serv_addr, sizeof serv_addr));
CHECKe(listen(sock,3));
client_addr_len = sizeof client_addr;
CHECKe(client = accept(sock, &client_addr, &client_addr_len ));
CHECKe(close(sock));
discard(client);
CHECKe(close(client));
exit(0);
}
void* new_thread(void* arg)
{
fd_set r;
int ret;
char garbage[] = "blah blah blah";
FD_ZERO(&r);
FD_SET(fd, &r);
printf("child: writing some garbage to fd %d\n", fd);
CHECKe(write(fd, garbage, sizeof garbage));
printf("child: calling select() with fd %d\n", fd);
CHECKe(ret = select(fd + 1, &r, NULL, NULL, NULL));
printf("child: select() returned %d\n", ret);
return NULL;
}
int
main()
{
pthread_t thread;
pthread_attr_t attr;
struct sockaddr_in addr;
int ret;
/* fork and have the child open a listener */
signal(SIGCHLD, SIG_IGN);
switch (fork()) {
case 0:
server();
exit(0);
case -1:
exit(errno);
default:
sleep(2);
}
/* Open up a TCP connection to the local discard port */
addr.sin_family = AF_INET;
addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
addr.sin_port = htons(TEST_PORT);
CHECKe(fd = socket(AF_INET, SOCK_STREAM, 0));
printf("main: connecting to test port with fd %d\n", fd);
ret = connect(fd, (struct sockaddr *)&addr, sizeof addr);
if (ret == -1)
fprintf(stderr, "connect() failed: ensure that the discard port is enabled for inetd(8)\n");
CHECKe(ret);
printf("main: connected on fd %d\n", fd);
CHECKr(pthread_attr_init(&attr));
CHECKe(pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED));
printf("starting child thread\n");
CHECKr(pthread_create(&thread, &attr, new_thread, NULL));
sleep(1);
printf("main: closing fd %d\n", fd);
CHECKe(close(fd));
printf("main: closed\n");
sleep(1);
SUCCEED;
}
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