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);
ATF_TC_HEAD(fflush_err,tc)42 ATF_TC_HEAD(fflush_err, tc)
43 {
44 atf_tc_set_md_var(tc, "descr", "Test errors from fflush(3)");
45 }
46
ATF_TC_BODY(fflush_err,tc)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
ATF_TC_CLEANUP(fflush_err,tc)80 ATF_TC_CLEANUP(fflush_err, tc)
81 {
82 (void)unlink(path);
83 }
84
85 ATF_TC_WITH_CLEANUP(fflush_seek);
ATF_TC_HEAD(fflush_seek,tc)86 ATF_TC_HEAD(fflush_seek, tc)
87 {
88 atf_tc_set_md_var(tc, "descr", "Test file offsets with fflush(3)");
89 }
90
ATF_TC_BODY(fflush_seek,tc)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
ATF_TC_CLEANUP(fflush_seek,tc)137 ATF_TC_CLEANUP(fflush_seek, tc)
138 {
139 (void)unlink(path);
140 }
141
142 ATF_TC_WITH_CLEANUP(fpurge_err);
ATF_TC_HEAD(fpurge_err,tc)143 ATF_TC_HEAD(fpurge_err, tc)
144 {
145 atf_tc_set_md_var(tc, "descr", "Test errors from fpurge(3)");
146 }
147
ATF_TC_BODY(fpurge_err,tc)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
ATF_TC_CLEANUP(fpurge_err,tc)162 ATF_TC_CLEANUP(fpurge_err, tc)
163 {
164 (void)unlink(path);
165 }
166
ATF_TP_ADD_TCS(tp)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