1 /* $NetBSD: t_fflush.c,v 1.1 2011/09/11 05:15:55 jruoho Exp $ */ 2 3 /*- 4 * Copyright (c) 2011 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jukka Ruohonen. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 #include <sys/cdefs.h> 32 __RCSID("$NetBSD: t_fflush.c,v 1.1 2011/09/11 05:15:55 jruoho Exp $"); 33 34 #include <atf-c.h> 35 #include <errno.h> 36 #include <stdio.h> 37 #include <unistd.h> 38 39 static const char *path = "fflush"; 40 41 ATF_TC_WITH_CLEANUP(fflush_err); 42 ATF_TC_HEAD(fflush_err, tc) 43 { 44 atf_tc_set_md_var(tc, "descr", "Test errors from fflush(3)"); 45 } 46 47 ATF_TC_BODY(fflush_err, tc) 48 { 49 FILE *f; 50 51 f = fopen(path, "w"); 52 53 ATF_REQUIRE(f != NULL); 54 ATF_REQUIRE(fflush(NULL) == 0); 55 ATF_REQUIRE(fclose(f) == 0); 56 57 f = fopen(path, "r"); 58 ATF_REQUIRE(f != NULL); 59 60 /* 61 * In NetBSD the call should fail if the supplied 62 * parameteris not an open stream or the stream is 63 * not open for writing. 64 */ 65 errno = 0; 66 ATF_REQUIRE_ERRNO(EBADF, fflush(f) == EOF); 67 68 ATF_REQUIRE(fclose(f) == 0); 69 70 errno = 0; 71 ATF_REQUIRE_ERRNO(EBADF, fflush(f) == EOF); 72 73 (void)unlink(path); 74 } 75 76 ATF_TC_CLEANUP(fflush_err, tc) 77 { 78 (void)unlink(path); 79 } 80 81 ATF_TC_WITH_CLEANUP(fflush_seek); 82 ATF_TC_HEAD(fflush_seek, tc) 83 { 84 atf_tc_set_md_var(tc, "descr", "Test file offsets with fflush(3)"); 85 } 86 87 ATF_TC_BODY(fflush_seek, tc) 88 { 89 char buf[12]; 90 int fd = -1; 91 FILE *f; 92 93 /* 94 * IEEE Std 1003.1-2008: 95 * 96 * "For a stream open for reading, if the file 97 * is not already at EOF, and the file is one 98 * capable of seeking, the file offset of the 99 * underlying open file description shall be 100 * adjusted so that the next operation on the 101 * open file description deals with the byte 102 * after the last one read from or written to 103 * the stream being flushed." 104 */ 105 f = fopen(path, "w"); 106 ATF_REQUIRE(f != NULL); 107 108 ATF_REQUIRE(fwrite("garbage", 1, 7, f) == 7); 109 ATF_REQUIRE(fclose(f) == 0); 110 111 f = fopen(path, "r+"); 112 ATF_REQUIRE(f != NULL); 113 114 fd = fileno(f); 115 ATF_REQUIRE(fd != -1); 116 117 ATF_REQUIRE(fread(buf, 1, 3, f) == 3); 118 ATF_REQUIRE(fflush(f) == 0); 119 ATF_REQUIRE(fseek(f, 0, SEEK_CUR) == 0); 120 121 /* 122 * Verify that the offsets are right and that 123 * a read operation resumes at the correct location. 124 */ 125 ATF_REQUIRE(ftell(f) == 3); 126 ATF_REQUIRE(lseek(fd, 0, SEEK_CUR) == 3); 127 ATF_REQUIRE(fgetc(f) == 'b'); 128 129 ATF_REQUIRE(fclose(f) == 0); 130 ATF_REQUIRE(unlink(path) == 0); 131 } 132 133 ATF_TC_CLEANUP(fflush_seek, tc) 134 { 135 (void)unlink(path); 136 } 137 138 ATF_TC_WITH_CLEANUP(fpurge_err); 139 ATF_TC_HEAD(fpurge_err, tc) 140 { 141 atf_tc_set_md_var(tc, "descr", "Test errors from fpurge(3)"); 142 } 143 144 ATF_TC_BODY(fpurge_err, tc) 145 { 146 FILE *f; 147 148 f = fopen(path, "w"); 149 ATF_REQUIRE(f != NULL); 150 ATF_REQUIRE(fclose(f) == 0); 151 152 errno = 0; 153 ATF_REQUIRE_ERRNO(EBADF, fpurge(f) == EOF); 154 155 (void)unlink(path); 156 } 157 158 ATF_TC_CLEANUP(fpurge_err, tc) 159 { 160 (void)unlink(path); 161 } 162 163 ATF_TP_ADD_TCS(tp) 164 { 165 166 ATF_TP_ADD_TC(tp, fflush_err); 167 ATF_TP_ADD_TC(tp, fflush_seek); 168 ATF_TP_ADD_TC(tp, fpurge_err); 169 170 return atf_no_error(); 171 } 172