/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2007 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/*
* Copyright (c) 2012 by Delphix. All rights reserved.
*/
/*
* --------------------------------------------------------------------
* The purpose of this test is to see if the bug reported (#4723351) for
* UFS exists when using a ZFS file system.
* --------------------------------------------------------------------
*
*/
#define _REENTRANT 1
#include <stdio.h>
#include <fcntl.h>
#include <pthread.h>
#include <thread.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <stdlib.h>
#include <unistd.h>
#include <strings.h>
static const int TRUE = 1;
static char *filebase;
static int
pickidx()
{
return (random() % 1000);
}
/* ARGSUSED */
static void *
mover(void *a)
{
char buf[256];
int idx, len, ret;
len = strlen(filebase) + 5;
while (TRUE) {
idx = pickidx();
(void) snprintf(buf, len, "%s.%03d", filebase, idx);
ret = rename(filebase, buf);
if (ret < 0 && errno != ENOENT)
(void) perror("renaming file");
}
return (NULL);
}
/* ARGSUSED */
static void *
cleaner(void *a)
{
char buf[256];
int idx, len, ret;
len = strlen(filebase) + 5;
while (TRUE) {
idx = pickidx();
(void) snprintf(buf, len, "%s.%03d", filebase, idx);
ret = remove(buf);
if (ret < 0 && errno != ENOENT)
(void) perror("removing file");
}
return (NULL);
}
static void *
writer(void *a)
{
int *fd = (int *)a;
while (TRUE) {
(void) close (*fd);
*fd = open(filebase, O_APPEND | O_RDWR | O_CREAT, 0644);
if (*fd < 0)
perror("refreshing file");
(void) write(*fd, "test\n", 5);
}
return (NULL);
}
int
main(int argc, char **argv)
{
int fd;
pthread_t tid;
if (argc == 1) {
(void) printf("Usage: %s <filebase>\n", argv[0]);
exit(-1);
}
filebase = argv[1];
fd = open(filebase, O_APPEND | O_RDWR | O_CREAT, 0644);
if (fd < 0) {
perror("creating test file");
exit(-1);
}
(void) thr_setconcurrency(4); /* 3 threads + main */
(void) pthread_create(&tid, NULL, mover, NULL);
(void) pthread_create(&tid, NULL, cleaner, NULL);
(void) pthread_create(&tid, NULL, writer, (void *) &fd);
while (TRUE) {
int ret;
struct stat st;
ret = stat(filebase, &st);
if (ret == 0 && (st.st_nlink > 2 || st.st_nlink < 1)) {
(void) printf("st.st_nlink = %d, exiting\n", \
(int)st.st_nlink);
exit(0);
}
(void) sleep(1);
}
return (0);
}