137 lines
3.1 KiB
C
137 lines
3.1 KiB
C
/*
|
|
* 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.
|
|
*/
|
|
|
|
/*
|
|
* Assertion:
|
|
*
|
|
* A read operation and directory update operation performed
|
|
* concurrently on the same directory can lead to deadlock
|
|
* on a UFS logging file system, but not on a ZFS file system.
|
|
*/
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
#include <errno.h>
|
|
#include <fcntl.h>
|
|
#include <string.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
#define TMP_DIR /tmp
|
|
|
|
static char dirpath[256];
|
|
|
|
int
|
|
main(int argc, char **argv)
|
|
{
|
|
char *cp1 = "";
|
|
int i = 0;
|
|
int ret = 0;
|
|
int testdd = 0;
|
|
pid_t pid;
|
|
static const int op_num = 5;
|
|
|
|
if (argc == 1) {
|
|
(void) printf("Usage: %s <mount point>\n", argv[0]);
|
|
exit(-1);
|
|
}
|
|
for (i = 0; i < 256; i++) {
|
|
dirpath[i] = 0;
|
|
}
|
|
|
|
cp1 = argv[1];
|
|
if (strlen(cp1) >= (sizeof (dirpath) - strlen("TMP_DIR"))) {
|
|
(void) printf("The string length of mount point is "
|
|
"too large\n");
|
|
exit(-1);
|
|
}
|
|
(void) strcpy(&dirpath[0], (const char *)cp1);
|
|
(void) strcat(&dirpath[strlen(dirpath)], "TMP_DIR");
|
|
|
|
ret = mkdir(dirpath, 0777);
|
|
if (ret != 0) {
|
|
if (errno != EEXIST) {
|
|
(void) printf("%s: mkdir(<%s>, 0777) failed: errno "
|
|
"(decimal)=%d\n", argv[0], dirpath, errno);
|
|
exit(-1);
|
|
}
|
|
}
|
|
testdd = open(dirpath, O_RDONLY|O_RSYNC|O_SYNC|O_DSYNC);
|
|
if (testdd < 0) {
|
|
(void) printf("%s: open(<%s>, O_RDONLY|O_RSYNC|O_SYNC|O_DSYNC)"
|
|
" failed: errno (decimal)=%d\n", argv[0], dirpath, errno);
|
|
exit(-1);
|
|
} else {
|
|
(void) close(testdd);
|
|
}
|
|
pid = fork();
|
|
if (pid > 0) {
|
|
int fd = open(dirpath, O_RDONLY|O_RSYNC|O_SYNC|O_DSYNC);
|
|
char buf[16];
|
|
int rdret;
|
|
int j = 0;
|
|
|
|
if (fd < 0) {
|
|
(void) printf("%s: open <%s> again failed:"
|
|
" errno = %d\n", argv[0], dirpath, errno);
|
|
exit(-1);
|
|
}
|
|
|
|
while (j < op_num) {
|
|
(void) sleep(1);
|
|
rdret = read(fd, buf, 16);
|
|
if (rdret == -1) {
|
|
(void) printf("readdir failed");
|
|
}
|
|
j++;
|
|
}
|
|
(void) close(fd);
|
|
} else if (pid == 0) {
|
|
int fd = open(dirpath, O_RDONLY);
|
|
int chownret;
|
|
int k = 0;
|
|
|
|
if (fd < 0) {
|
|
(void) printf("%s: open(<%s>, O_RDONLY) again failed:"
|
|
" errno (decimal)=%d\n", argv[0], dirpath, errno);
|
|
exit(-1);
|
|
}
|
|
|
|
while (k < op_num) {
|
|
(void) sleep(1);
|
|
chownret = fchown(fd, 0, 0);
|
|
if (chownret == -1) {
|
|
(void) printf("chown failed");
|
|
}
|
|
|
|
k++;
|
|
}
|
|
(void) close(fd);
|
|
}
|
|
|
|
return (0);
|
|
}
|