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/* $OpenBSD: test_close.c,v 1.2 2000/10/04 05:50:58 d Exp $ */
/*
* Test the semantics of close() while a select() is happening.
* Not a great test. You need the 'discard' service running in inetd for
* this to work.
*/
#include <pthread.h>
#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include "test.h"
int fd;
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;
/* 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(9); /* port 9/tcp is discard service */
CHECKe(fd = socket(AF_INET, SOCK_STREAM, 0));
printf("main: connecting to discard 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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