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 #ifdef __FreeBSD__ 52 atf_tc_expect_fail("the EOF invariant fails on FreeBSD; this is new"); 53 #endif 54 55 f = fopen(path, "w"); 56 57 ATF_REQUIRE(f != NULL); 58 ATF_REQUIRE(fflush(NULL) == 0); 59 ATF_REQUIRE(fclose(f) == 0); 60 61 f = fopen(path, "r"); 62 ATF_REQUIRE(f != NULL); 63 64 /* 65 * In NetBSD the call should fail if the supplied 66 * parameteris not an open stream or the stream is 67 * not open for writing. 68 */ 69 errno = 0; 70 ATF_REQUIRE_ERRNO(EBADF, fflush(f) == EOF); 71 72 ATF_REQUIRE(fclose(f) == 0); 73 74 errno = 0; 75 ATF_REQUIRE_ERRNO(EBADF, fflush(f) == EOF); 76 77 (void)unlink(path); 78 } 79 80 ATF_TC_CLEANUP(fflush_err, tc) 81 { 82 (void)unlink(path); 83 } 84 85 ATF_TC_WITH_CLEANUP(fflush_seek); 86 ATF_TC_HEAD(fflush_seek, tc) 87 { 88 atf_tc_set_md_var(tc, "descr", "Test file offsets with fflush(3)"); 89 } 90 91 ATF_TC_BODY(fflush_seek, tc) 92 { 93 char buf[12]; 94 int fd = -1; 95 FILE *f; 96 97 /* 98 * IEEE Std 1003.1-2008: 99 * 100 * "For a stream open for reading, if the file 101 * is not already at EOF, and the file is one 102 * capable of seeking, the file offset of the 103 * underlying open file description shall be 104 * adjusted so that the next operation on the 105 * open file description deals with the byte 106 * after the last one read from or written to 107 * the stream being flushed." 108 */ 109 f = fopen(path, "w"); 110 ATF_REQUIRE(f != NULL); 111 112 ATF_REQUIRE(fwrite("garbage", 1, 7, f) == 7); 113 ATF_REQUIRE(fclose(f) == 0); 114 115 f = fopen(path, "r+"); 116 ATF_REQUIRE(f != NULL); 117 118 fd = fileno(f); 119 ATF_REQUIRE(fd != -1); 120 121 ATF_REQUIRE(fread(buf, 1, 3, f) == 3); 122 ATF_REQUIRE(fflush(f) == 0); 123 ATF_REQUIRE(fseek(f, 0, SEEK_CUR) == 0); 124 125 /* 126 * Verify that the offsets are right and that 127 * a read operation resumes at the correct location. 128 */ 129 ATF_REQUIRE(ftell(f) == 3); 130 ATF_REQUIRE(lseek(fd, 0, SEEK_CUR) == 3); 131 ATF_REQUIRE(fgetc(f) == 'b'); 132 133 ATF_REQUIRE(fclose(f) == 0); 134 ATF_REQUIRE(unlink(path) == 0); 135 } 136 137 ATF_TC_CLEANUP(fflush_seek, tc) 138 { 139 (void)unlink(path); 140 } 141 142 ATF_TC_WITH_CLEANUP(fpurge_err); 143 ATF_TC_HEAD(fpurge_err, tc) 144 { 145 atf_tc_set_md_var(tc, "descr", "Test errors from fpurge(3)"); 146 } 147 148 ATF_TC_BODY(fpurge_err, tc) 149 { 150 FILE *f; 151 152 f = fopen(path, "w"); 153 ATF_REQUIRE(f != NULL); 154 ATF_REQUIRE(fclose(f) == 0); 155 156 errno = 0; 157 ATF_REQUIRE_ERRNO(EBADF, fpurge(f) == EOF); 158 159 (void)unlink(path); 160 } 161 162 ATF_TC_CLEANUP(fpurge_err, tc) 163 { 164 (void)unlink(path); 165 } 166 167 ATF_TP_ADD_TCS(tp) 168 { 169 170 ATF_TP_ADD_TC(tp, fflush_err); 171 ATF_TP_ADD_TC(tp, fflush_seek); 172 ATF_TP_ADD_TC(tp, fpurge_err); 173 174 return atf_no_error(); 175 } 176