1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright 2007 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 /* 28 * Copyright (c) 2012 by Delphix. All rights reserved. 29 */ 30 31 #include "../file_common.h" 32 #include <sys/param.h> 33 #include <signal.h> 34 #include <stdio.h> 35 36 /* 37 * -------------------------------------------------------------- 38 * 39 * Assertion: 40 * The last byte of the largest file size can be 41 * accessed without any errors. Also, the writing 42 * beyond the last byte of the largest file size 43 * will produce an errno of EFBIG. 44 * 45 * -------------------------------------------------------------- 46 * If the write() system call below returns a "1", 47 * then the last byte can be accessed. 48 * -------------------------------------------------------------- 49 */ 50 static void sigxfsz(int); 51 static void usage(char *); 52 53 int 54 main(int argc, char **argv) 55 { 56 int fd = 0; 57 offset_t offset = (MAXOFFSET_T - 1); 58 offset_t llseek_ret = 0; 59 int write_ret = 0; 60 int err = 0; 61 char mybuf[5]; 62 char *testfile; 63 mode_t mode = S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH; 64 65 if (argc != 2) { 66 usage(argv[0]); 67 } 68 69 (void) sigset(SIGXFSZ, sigxfsz); 70 71 testfile = strdup(argv[1]); 72 73 fd = open(testfile, O_CREAT | O_RDWR, mode); 74 if (fd < 0) { 75 perror("Failed to create testfile"); 76 err = errno; 77 goto out; 78 } 79 80 llseek_ret = llseek(fd, offset, SEEK_SET); 81 if (llseek_ret < 0) { 82 perror("Failed to seek to end of testfile"); 83 err = errno; 84 goto out; 85 } 86 87 write_ret = write(fd, mybuf, 1); 88 if (write_ret < 0) { 89 perror("Failed to write to end of file"); 90 err = errno; 91 goto out; 92 } 93 94 offset = 0; 95 llseek_ret = llseek(fd, offset, SEEK_CUR); 96 if (llseek_ret < 0) { 97 perror("Failed to seek to end of file"); 98 err = errno; 99 goto out; 100 } 101 102 write_ret = write(fd, mybuf, 1); 103 if (write_ret < 0) { 104 if (errno == EFBIG) { 105 (void) printf("write errno=EFBIG: success\n"); 106 err = 0; 107 } else { 108 perror("Did not receive EFBIG"); 109 err = errno; 110 } 111 } else { 112 (void) printf("write completed successfully, test failed\n"); 113 err = 1; 114 } 115 116 out: 117 (void) unlink(testfile); 118 free(testfile); 119 return (err); 120 } 121 122 static void 123 usage(char *name) 124 { 125 (void) printf("%s <testfile>\n", name); 126 exit(1); 127 } 128 129 /* ARGSUSED */ 130 static void 131 sigxfsz(int signo) 132 { 133 (void) printf("\nlargest_file: sigxfsz() caught SIGXFSZ\n"); 134 } 135