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5b1443c47e
sigset(3) isn't portable.
This code fails to compile on platforms without sigset(3).
Use sigaction(2).
--
largest_file.c: In function 'main':
largest_file.c:75:9: error: implicit declaration of function 'sigset'; did you mean 'sigvec'? [-Werror=implicit-function-declaration]
(void) sigset(SIGXFSZ, sigxfsz);
^~~~~~
sigvec
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Tomohiro Kusumi <kusumi.tomohiro@gmail.com>
Closes #8593
149 lines
3.4 KiB
C
149 lines
3.4 KiB
C
/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License (the "License").
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* You may not use this file except in compliance with the License.
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*
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* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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* or http://www.opensolaris.org/os/licensing.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* information: Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*/
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/*
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* Copyright 2007 Sun Microsystems, Inc. All rights reserved.
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* Use is subject to license terms.
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*/
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/*
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* Copyright (c) 2012 by Delphix. All rights reserved.
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*/
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#include "../file_common.h"
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#include <sys/param.h>
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#include <signal.h>
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#include <stdio.h>
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#include <string.h>
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#include <sys/types.h>
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#include <unistd.h>
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typedef long long offset_t;
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#define MAXOFFSET_T LLONG_MAX
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/*
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* --------------------------------------------------------------
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*
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* Assertion:
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* The last byte of the largest file size can be
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* accessed without any errors. Also, the writing
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* beyond the last byte of the largest file size
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* will produce an errno of EFBIG.
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*
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* --------------------------------------------------------------
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* If the write() system call below returns a "1",
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* then the last byte can be accessed.
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* --------------------------------------------------------------
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*/
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static void sigxfsz(int);
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static void usage(char *);
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int
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main(int argc, char **argv)
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{
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int fd = 0;
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offset_t offset = (MAXOFFSET_T - 1);
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offset_t llseek_ret = 0;
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int write_ret = 0;
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int err = 0;
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char mybuf[5] = "aaaa\0";
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char *testfile;
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mode_t mode = S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH;
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struct sigaction sa;
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if (argc != 2) {
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usage(argv[0]);
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}
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if (sigemptyset(&sa.sa_mask) == -1)
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return (errno);
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sa.sa_flags = 0;
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sa.sa_handler = sigxfsz;
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if (sigaction(SIGXFSZ, &sa, NULL) == -1)
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return (errno);
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testfile = strdup(argv[1]);
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fd = open(testfile, O_CREAT | O_RDWR, mode);
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if (fd < 0) {
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err = errno;
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perror("Failed to create testfile");
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free(testfile);
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return (err);
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}
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llseek_ret = lseek64(fd, offset, SEEK_SET);
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if (llseek_ret < 0) {
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err = errno;
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perror("Failed to seek to end of testfile");
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goto out;
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}
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write_ret = write(fd, mybuf, 1);
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if (write_ret < 0) {
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err = errno;
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perror("Failed to write to end of file");
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goto out;
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}
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offset = 0;
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llseek_ret = lseek64(fd, offset, SEEK_CUR);
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if (llseek_ret < 0) {
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err = errno;
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perror("Failed to seek to end of file");
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goto out;
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}
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write_ret = write(fd, mybuf, 1);
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if (write_ret < 0) {
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if (errno == EFBIG || errno == EINVAL) {
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(void) printf("write errno=EFBIG|EINVAL: success\n");
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err = 0;
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} else {
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err = errno;
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perror("Did not receive EFBIG");
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}
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} else {
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(void) printf("write completed successfully, test failed\n");
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err = 1;
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}
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out:
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(void) unlink(testfile);
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free(testfile);
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close(fd);
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return (err);
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}
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static void
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usage(char *name)
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{
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(void) printf("%s <testfile>\n", name);
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exit(1);
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}
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/* ARGSUSED */
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static void
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sigxfsz(int signo)
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{
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(void) printf("\nlargest_file: sigxfsz() caught SIGXFSZ\n");
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}
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