1716fd348SMartin Matuska /*
2716fd348SMartin Matuska * CDDL HEADER START
3716fd348SMartin Matuska *
4716fd348SMartin Matuska * The contents of this file are subject to the terms of the
5716fd348SMartin Matuska * Common Development and Distribution License (the "License").
6716fd348SMartin Matuska * You may not use this file except in compliance with the License.
7716fd348SMartin Matuska *
8716fd348SMartin Matuska * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9271171e0SMartin Matuska * or https://opensource.org/licenses/CDDL-1.0.
10716fd348SMartin Matuska * See the License for the specific language governing permissions
11716fd348SMartin Matuska * and limitations under the License.
12716fd348SMartin Matuska *
13716fd348SMartin Matuska * When distributing Covered Code, include this CDDL HEADER in each
14716fd348SMartin Matuska * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15716fd348SMartin Matuska * If applicable, add the following below this CDDL HEADER, with the
16716fd348SMartin Matuska * fields enclosed by brackets "[]" replaced with your own identifying
17716fd348SMartin Matuska * information: Portions Copyright [yyyy] [name of copyright owner]
18716fd348SMartin Matuska *
19716fd348SMartin Matuska * CDDL HEADER END
20716fd348SMartin Matuska */
21716fd348SMartin Matuska
22716fd348SMartin Matuska /*
23716fd348SMartin Matuska * Copyright 2007 Sun Microsystems, Inc. All rights reserved.
24716fd348SMartin Matuska * Use is subject to license terms.
25716fd348SMartin Matuska */
26716fd348SMartin Matuska
27716fd348SMartin Matuska /*
28716fd348SMartin Matuska * Copyright (c) 2012 by Delphix. All rights reserved.
29716fd348SMartin Matuska */
30716fd348SMartin Matuska
31716fd348SMartin Matuska #include "file_common.h"
32716fd348SMartin Matuska #include <sys/param.h>
33716fd348SMartin Matuska #include <signal.h>
34716fd348SMartin Matuska #include <stdio.h>
35716fd348SMartin Matuska #include <string.h>
36716fd348SMartin Matuska #include <sys/stdtypes.h>
37716fd348SMartin Matuska #include <unistd.h>
38716fd348SMartin Matuska
39716fd348SMartin Matuska /*
40716fd348SMartin Matuska * --------------------------------------------------------------
41716fd348SMartin Matuska *
42716fd348SMartin Matuska * Assertion:
43716fd348SMartin Matuska * The last byte of the largest file size can be
44716fd348SMartin Matuska * accessed without any errors. Also, the writing
45716fd348SMartin Matuska * beyond the last byte of the largest file size
46716fd348SMartin Matuska * will produce an errno of EFBIG.
47716fd348SMartin Matuska *
48716fd348SMartin Matuska * --------------------------------------------------------------
49716fd348SMartin Matuska * If the write() system call below returns a "1",
50716fd348SMartin Matuska * then the last byte can be accessed.
51716fd348SMartin Matuska * --------------------------------------------------------------
52716fd348SMartin Matuska */
53716fd348SMartin Matuska static void sigxfsz(int);
54716fd348SMartin Matuska static void usage(char *);
55716fd348SMartin Matuska
56716fd348SMartin Matuska int
main(int argc,char ** argv)57716fd348SMartin Matuska main(int argc, char **argv)
58716fd348SMartin Matuska {
59716fd348SMartin Matuska int fd = 0;
60716fd348SMartin Matuska offset_t offset = (MAXOFFSET_T - 1);
61716fd348SMartin Matuska offset_t llseek_ret = 0;
62716fd348SMartin Matuska int write_ret = 0;
63716fd348SMartin Matuska int err = 0;
64716fd348SMartin Matuska char mybuf[5] = "aaaa\0";
65716fd348SMartin Matuska char *testfile;
66716fd348SMartin Matuska mode_t mode = S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH;
67716fd348SMartin Matuska struct sigaction sa;
68716fd348SMartin Matuska
69716fd348SMartin Matuska if (argc != 2) {
70716fd348SMartin Matuska usage(argv[0]);
71716fd348SMartin Matuska }
72716fd348SMartin Matuska
73716fd348SMartin Matuska if (sigemptyset(&sa.sa_mask) == -1)
74716fd348SMartin Matuska return (errno);
75716fd348SMartin Matuska sa.sa_flags = 0;
76716fd348SMartin Matuska sa.sa_handler = sigxfsz;
77716fd348SMartin Matuska if (sigaction(SIGXFSZ, &sa, NULL) == -1)
78716fd348SMartin Matuska return (errno);
79716fd348SMartin Matuska
80716fd348SMartin Matuska testfile = strdup(argv[1]);
81*dbd5678dSMartin Matuska if (testfile == NULL)
82*dbd5678dSMartin Matuska return (errno);
83716fd348SMartin Matuska
84716fd348SMartin Matuska fd = open(testfile, O_CREAT | O_RDWR, mode);
85716fd348SMartin Matuska if (fd < 0) {
86716fd348SMartin Matuska err = errno;
87716fd348SMartin Matuska perror("Failed to create testfile");
88716fd348SMartin Matuska free(testfile);
89716fd348SMartin Matuska return (err);
90716fd348SMartin Matuska }
91716fd348SMartin Matuska
92716fd348SMartin Matuska llseek_ret = lseek64(fd, offset, SEEK_SET);
93716fd348SMartin Matuska if (llseek_ret < 0) {
94716fd348SMartin Matuska err = errno;
95716fd348SMartin Matuska perror("Failed to seek to end of testfile");
96716fd348SMartin Matuska goto out;
97716fd348SMartin Matuska }
98716fd348SMartin Matuska
99716fd348SMartin Matuska write_ret = write(fd, mybuf, 1);
100716fd348SMartin Matuska if (write_ret < 0) {
101716fd348SMartin Matuska err = errno;
102716fd348SMartin Matuska perror("Failed to write to end of file");
103716fd348SMartin Matuska goto out;
104716fd348SMartin Matuska }
105716fd348SMartin Matuska
106716fd348SMartin Matuska offset = 0;
107716fd348SMartin Matuska llseek_ret = lseek64(fd, offset, SEEK_CUR);
108716fd348SMartin Matuska if (llseek_ret < 0) {
109716fd348SMartin Matuska err = errno;
110716fd348SMartin Matuska perror("Failed to seek to end of file");
111716fd348SMartin Matuska goto out;
112716fd348SMartin Matuska }
113716fd348SMartin Matuska
114716fd348SMartin Matuska write_ret = write(fd, mybuf, 1);
115716fd348SMartin Matuska if (write_ret < 0) {
116716fd348SMartin Matuska if (errno == EFBIG || errno == EINVAL) {
117716fd348SMartin Matuska (void) printf("write errno=EFBIG|EINVAL: success\n");
118716fd348SMartin Matuska err = 0;
119716fd348SMartin Matuska } else {
120716fd348SMartin Matuska err = errno;
121716fd348SMartin Matuska perror("Did not receive EFBIG");
122716fd348SMartin Matuska }
123716fd348SMartin Matuska } else {
124716fd348SMartin Matuska (void) printf("write completed successfully, test failed\n");
125716fd348SMartin Matuska err = 1;
126716fd348SMartin Matuska }
127716fd348SMartin Matuska
128716fd348SMartin Matuska out:
129716fd348SMartin Matuska (void) unlink(testfile);
130716fd348SMartin Matuska free(testfile);
131716fd348SMartin Matuska close(fd);
132716fd348SMartin Matuska return (err);
133716fd348SMartin Matuska }
134716fd348SMartin Matuska
135716fd348SMartin Matuska static void
usage(char * name)136716fd348SMartin Matuska usage(char *name)
137716fd348SMartin Matuska {
138716fd348SMartin Matuska (void) printf("%s <testfile>\n", name);
139716fd348SMartin Matuska exit(1);
140716fd348SMartin Matuska }
141716fd348SMartin Matuska
142716fd348SMartin Matuska static void
sigxfsz(int signo)143716fd348SMartin Matuska sigxfsz(int signo)
144716fd348SMartin Matuska {
145716fd348SMartin Matuska (void) signo;
146716fd348SMartin Matuska (void) printf("\nlargest_file: sigxfsz() caught SIGXFSZ\n");
147716fd348SMartin Matuska }
148