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1 | /*- |
2 | Copyright (C) 2013 Pietro Cerutti <gahr@FreeBSD.org> | |
3 | ||
4 | Redistribution and use in source and binary forms, with or without | |
5 | modification, are permitted provided that the following conditions | |
6 | are met: | |
7 | 1. Redistributions of source code must retain the above copyright | |
8 | notice, this list of conditions and the following disclaimer. | |
9 | 2. Redistributions in binary form must reproduce the above copyright | |
10 | notice, this list of conditions and the following disclaimer in the | |
11 | documentation and/or other materials provided with the distribution. | |
12 | ||
13 | THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND | |
14 | ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
15 | IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
16 | ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE | |
17 | FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
18 | DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
19 | OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
20 | HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
21 | LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
22 | OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
23 | SUCH DAMAGE. | |
24 | */ | |
25 | ||
26 | /* | |
27 | * Test basic FILE * functions (fread, fwrite, fseek, fclose) against | |
28 | * a FILE * retrieved using fmemopen() | |
29 | */ | |
30 | ||
31 | #include <sys/cdefs.h> | |
32 | ||
33 | #include <errno.h> | |
34 | #include <stdio.h> | |
35 | #include <string.h> | |
36 | #include <strings.h> | |
37 | ||
38 | #include <darwintest.h> | |
39 | ||
40 | T_DECL(freebsd_fmemopen_test_preexisting, "") | |
41 | { | |
42 | /* Use a pre-existing buffer. */ | |
43 | char buf[512]; | |
44 | char buf2[512]; | |
45 | char str[] = "Test writing some stuff"; | |
46 | char str2[] = "AAAAAAAAA"; | |
47 | char str3[] = "AAAA writing some stuff"; | |
48 | FILE *fp; | |
49 | size_t nofw, nofr; | |
50 | int rc; | |
51 | ||
52 | /* Open a FILE * using fmemopen. */ | |
53 | fp = fmemopen(buf, sizeof(buf), "w"); | |
54 | T_ASSERT_NOTNULL(fp, NULL); | |
55 | ||
56 | /* Write to the buffer. */ | |
57 | nofw = fwrite(str, 1, sizeof(str), fp); | |
58 | T_ASSERT_EQ(nofw, sizeof(str), NULL); | |
59 | ||
60 | /* Close the FILE *. */ | |
61 | rc = fclose(fp); | |
62 | T_ASSERT_POSIX_ZERO(rc, NULL); | |
63 | ||
64 | /* Re-open the FILE * to read back the data. */ | |
65 | fp = fmemopen(buf, sizeof(buf), "r"); | |
66 | T_ASSERT_NOTNULL(fp, NULL); | |
67 | ||
68 | /* Read from the buffer. */ | |
69 | bzero(buf2, sizeof(buf2)); | |
70 | nofr = fread(buf2, 1, sizeof(buf2), fp); | |
71 | T_ASSERT_EQ(nofr, sizeof(buf2), NULL); | |
72 | ||
73 | /* | |
74 | * Since a write on a FILE * retrieved by fmemopen | |
75 | * will add a '\0' (if there's space), we can check | |
76 | * the strings for equality. | |
77 | */ | |
78 | T_ASSERT_EQ_STR(str, buf2, NULL); | |
79 | ||
80 | /* Close the FILE *. */ | |
81 | rc = fclose(fp); | |
82 | T_ASSERT_POSIX_ZERO(rc, NULL); | |
83 | ||
84 | /* Now open a FILE * on the first 4 bytes of the string. */ | |
85 | fp = fmemopen(str, 4, "w"); | |
86 | T_ASSERT_NOTNULL(fp, NULL); | |
87 | ||
88 | /* | |
89 | * Try to write more bytes than we shoud, we'll get a short count (4). | |
90 | */ | |
91 | nofw = fwrite(str2, 1, sizeof(str2), fp); | |
92 | T_ASSERT_EQ(nofw, 4UL, NULL); | |
93 | ||
94 | /* Close the FILE *. */ | |
95 | rc = fclose(fp); | |
96 | T_ASSERT_POSIX_ZERO(rc, NULL); | |
97 | ||
98 | /* Check that the string was not modified after the first 4 bytes. */ | |
99 | T_ASSERT_EQ_STR(str, str3, NULL); | |
100 | } | |
101 | ||
102 | T_DECL(freebsd_fmemopen_test_autoalloc, "") | |
103 | { | |
104 | /* Let fmemopen allocate the buffer. */ | |
105 | FILE *fp; | |
106 | long pos; | |
107 | size_t nofw, i; | |
108 | int rc; | |
109 | ||
110 | /* Open a FILE * using fmemopen. */ | |
111 | fp = fmemopen(NULL, 512, "w+"); | |
112 | T_ASSERT_NOTNULL(fp, NULL); | |
113 | ||
114 | /* fill the buffer */ | |
115 | for (i = 0; i < 512; i++) { | |
116 | nofw = fwrite("a", 1, 1, fp); | |
117 | T_ASSERT_EQ(nofw, 1UL, NULL); | |
118 | } | |
119 | ||
120 | /* Get the current position into the stream. */ | |
121 | pos = ftell(fp); | |
122 | T_ASSERT_EQ(pos, 512L, NULL); | |
123 | ||
124 | /* Try to write past the end, we should get a short object count (0) */ | |
125 | nofw = fwrite("a", 1, 1, fp); | |
126 | T_ASSERT_POSIX_ZERO(nofw, NULL); | |
127 | ||
128 | /* Close the FILE *. */ | |
129 | rc = fclose(fp); | |
130 | T_ASSERT_POSIX_ZERO(rc, NULL); | |
131 | ||
132 | /* Open a FILE * using a wrong mode */ | |
133 | fp = fmemopen(NULL, 512, "r"); | |
134 | T_ASSERT_NULL(fp, NULL); | |
135 | ||
136 | fp = fmemopen(NULL, 512, "w"); | |
137 | T_ASSERT_NULL(fp, NULL); | |
138 | } | |
139 | ||
140 | T_DECL(freebsd_fmemopen_test_data_length, "") | |
141 | { | |
142 | /* | |
143 | * Here we test that a read operation doesn't go past the end of the | |
144 | * data actually written, and that a SEEK_END seeks from the end of the | |
145 | * data, not of the whole buffer. | |
146 | */ | |
147 | FILE *fp; | |
148 | char buf[512] = {'\0'}; | |
149 | char str[] = "Test data length. "; | |
150 | char str2[] = "Do we have two sentences?"; | |
151 | char str3[sizeof(str) + sizeof(str2) -1]; | |
152 | long pos; | |
153 | size_t nofw, nofr; | |
154 | int rc; | |
155 | ||
156 | /* Open a FILE * for updating our buffer. */ | |
157 | fp = fmemopen(buf, sizeof(buf), "w+"); | |
158 | T_ASSERT_NOTNULL(fp, NULL); | |
159 | ||
160 | /* Write our string into the buffer. */ | |
161 | nofw = fwrite(str, 1, sizeof(str), fp); | |
162 | T_ASSERT_EQ(nofw, sizeof(str), NULL); | |
163 | ||
164 | /* Now seek to the end and check that ftell gives us sizeof(str). */ | |
165 | rc = fseek(fp, 0, SEEK_END); | |
166 | T_ASSERT_POSIX_ZERO(rc, NULL); | |
167 | pos = ftell(fp); | |
168 | T_ASSERT_EQ(pos, (long)sizeof(str), NULL); | |
169 | ||
170 | /* Close the FILE *. */ | |
171 | rc = fclose(fp); | |
172 | T_ASSERT_POSIX_ZERO(rc, NULL); | |
173 | ||
174 | /* Reopen the buffer for appending. */ | |
175 | fp = fmemopen(buf, sizeof(buf), "a+"); | |
176 | T_ASSERT_NOTNULL(fp, NULL); | |
177 | ||
178 | /* We should now be writing after the first string. */ | |
179 | nofw = fwrite(str2, 1, sizeof(str2), fp); | |
180 | T_ASSERT_EQ(nofw, sizeof(str2), NULL); | |
181 | ||
182 | /* Rewind the FILE *. */ | |
183 | rc = fseek(fp, 0, SEEK_SET); | |
184 | T_ASSERT_POSIX_ZERO(rc, NULL); | |
185 | ||
186 | /* Make sure we're at the beginning. */ | |
187 | pos = ftell(fp); | |
188 | T_ASSERT_EQ(pos, 0L, NULL); | |
189 | ||
190 | /* Read the whole buffer. */ | |
191 | nofr = fread(str3, 1, sizeof(buf), fp); | |
192 | T_ASSERT_EQ(nofr, sizeof(str3), NULL); | |
193 | ||
194 | /* Make sure the two strings are there. */ | |
195 | T_ASSERT_EQ(strncmp(str3, str, sizeof(str) - 1), 0, NULL); | |
196 | T_ASSERT_EQ(strncmp(str3 + sizeof(str) - 1, str2, sizeof(str2)), 0, NULL); | |
197 | ||
198 | /* Close the FILE *. */ | |
199 | rc = fclose(fp); | |
200 | T_ASSERT_POSIX_ZERO(rc, NULL); | |
201 | } | |
202 | ||
203 | T_DECL(freebsd_fmemopen_test_binary, "") | |
204 | { | |
205 | /* | |
206 | * Make sure that NULL bytes are never appended when opening a buffer | |
207 | * in binary mode. | |
208 | */ | |
209 | ||
210 | FILE *fp; | |
211 | char buf[20]; | |
212 | char str[] = "Test"; | |
213 | size_t nofw; | |
214 | int rc; | |
215 | ||
216 | /* Pre-fill the buffer. */ | |
217 | memset(buf, 'A', sizeof(buf)); | |
218 | ||
219 | /* Open a FILE * in binary mode. */ | |
220 | fp = fmemopen(buf, sizeof(buf), "w+b"); | |
221 | T_ASSERT_NOTNULL(fp, NULL); | |
222 | ||
223 | /* Write some data into it. */ | |
224 | nofw = fwrite(str, 1, strlen(str), fp); | |
225 | T_ASSERT_EQ(nofw, strlen(str), NULL); | |
226 | ||
227 | /* Make sure that the buffer doesn't contain any NULL bytes. */ | |
228 | for (size_t i = 0; i < sizeof(buf); i++) | |
229 | T_ASSERT_NE(buf[i], '\0', NULL); | |
230 | ||
231 | /* Close the FILE *. */ | |
232 | rc = fclose(fp); | |
233 | T_ASSERT_POSIX_ZERO(rc, NULL); | |
234 | } | |
235 | ||
236 | T_DECL(freebsd_fmemopen_test_append_binary_pos, "") | |
237 | { | |
238 | /* | |
239 | * For compatibility with other implementations (glibc), we set the | |
240 | * position to 0 when opening an automatically allocated binary stream | |
241 | * for appending. | |
242 | */ | |
243 | ||
244 | FILE *fp; | |
245 | ||
246 | fp = fmemopen(NULL, 16, "ab+"); | |
247 | T_ASSERT_NOTNULL(fp, NULL); | |
248 | T_ASSERT_EQ(ftell(fp), 0L, NULL); | |
249 | fclose(fp); | |
250 | ||
251 | /* Make sure that a pre-allocated buffer behaves correctly. */ | |
252 | char buf[] = "Hello"; | |
253 | fp = fmemopen(buf, sizeof(buf), "ab+"); | |
254 | T_ASSERT_NOTNULL(fp, NULL); | |
255 | T_ASSERT_EQ(ftell(fp), (long)strlen(buf), NULL); | |
256 | fclose(fp); | |
257 | } | |
258 | ||
259 | T_DECL(freebsd_fmemopen_test_size_0, "") | |
260 | { | |
261 | /* POSIX mandates that we return EINVAL if size is 0. */ | |
262 | ||
263 | FILE *fp; | |
264 | ||
265 | fp = fmemopen(NULL, 0, "r+"); | |
266 | T_ASSERT_NULL(fp, NULL); | |
267 | T_ASSERT_EQ(errno, EINVAL, NULL); | |
268 | } |