143 lines
3.2 KiB
C
143 lines
3.2 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.
|
|
*/
|
|
|
|
/*
|
|
* Copyright (c) 2012 by Delphix. All rights reserved.
|
|
*/
|
|
|
|
#include "../file_common.h"
|
|
#include <sys/param.h>
|
|
#include <signal.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <sys/types.h>
|
|
#include <unistd.h>
|
|
|
|
typedef long long offset_t;
|
|
#define MAXOFFSET_T LLONG_MAX
|
|
|
|
/*
|
|
* --------------------------------------------------------------
|
|
*
|
|
* Assertion:
|
|
* The last byte of the largest file size can be
|
|
* accessed without any errors. Also, the writing
|
|
* beyond the last byte of the largest file size
|
|
* will produce an errno of EFBIG.
|
|
*
|
|
* --------------------------------------------------------------
|
|
* If the write() system call below returns a "1",
|
|
* then the last byte can be accessed.
|
|
* --------------------------------------------------------------
|
|
*/
|
|
static void sigxfsz(int);
|
|
static void usage(char *);
|
|
|
|
int
|
|
main(int argc, char **argv)
|
|
{
|
|
int fd = 0;
|
|
offset_t offset = (MAXOFFSET_T - 1);
|
|
offset_t llseek_ret = 0;
|
|
int write_ret = 0;
|
|
int err = 0;
|
|
char mybuf[5] = "aaaa\0";
|
|
char *testfile;
|
|
mode_t mode = S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH;
|
|
|
|
if (argc != 2) {
|
|
usage(argv[0]);
|
|
}
|
|
|
|
(void) sigset(SIGXFSZ, sigxfsz);
|
|
|
|
testfile = strdup(argv[1]);
|
|
|
|
fd = open(testfile, O_CREAT | O_RDWR, mode);
|
|
if (fd < 0) {
|
|
err = errno;
|
|
perror("Failed to create testfile");
|
|
free(testfile);
|
|
return (err);
|
|
}
|
|
|
|
llseek_ret = lseek64(fd, offset, SEEK_SET);
|
|
if (llseek_ret < 0) {
|
|
err = errno;
|
|
perror("Failed to seek to end of testfile");
|
|
goto out;
|
|
}
|
|
|
|
write_ret = write(fd, mybuf, 1);
|
|
if (write_ret < 0) {
|
|
err = errno;
|
|
perror("Failed to write to end of file");
|
|
goto out;
|
|
}
|
|
|
|
offset = 0;
|
|
llseek_ret = lseek64(fd, offset, SEEK_CUR);
|
|
if (llseek_ret < 0) {
|
|
err = errno;
|
|
perror("Failed to seek to end of file");
|
|
goto out;
|
|
}
|
|
|
|
write_ret = write(fd, mybuf, 1);
|
|
if (write_ret < 0) {
|
|
if (errno == EFBIG) {
|
|
(void) printf("write errno=EFBIG: success\n");
|
|
err = 0;
|
|
} else {
|
|
err = errno;
|
|
perror("Did not receive EFBIG");
|
|
}
|
|
} else {
|
|
(void) printf("write completed successfully, test failed\n");
|
|
err = 1;
|
|
}
|
|
|
|
out:
|
|
(void) unlink(testfile);
|
|
free(testfile);
|
|
close(fd);
|
|
return (err);
|
|
}
|
|
|
|
static void
|
|
usage(char *name)
|
|
{
|
|
(void) printf("%s <testfile>\n", name);
|
|
exit(1);
|
|
}
|
|
|
|
/* ARGSUSED */
|
|
static void
|
|
sigxfsz(int signo)
|
|
{
|
|
(void) printf("\nlargest_file: sigxfsz() caught SIGXFSZ\n");
|
|
}
|