2 Copyright (C) 2013 Pietro Cerutti <gahr@FreeBSD.org>
4 Redistribution and use in source and binary forms, with or without
5 modification, are permitted provided that the following conditions
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.
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
27 * Test basic FILE * functions (fread, fwrite, fseek, fclose) against
28 * a FILE * retrieved using fmemopen()
31 #include <sys/cdefs.h>
32 __FBSDID("$FreeBSD$");
40 ATF_TC_WITHOUT_HEAD(test_preexisting);
41 ATF_TC_BODY(test_preexisting, tc)
44 * Use a pre-existing buffer.
49 char str[] = "Test writing some stuff";
50 char str2[] = "AAAAAAAAA";
51 char str3[] = "AAAA writing some stuff";
56 /* Open a FILE * using fmemopen. */
57 fp = fmemopen(buf, sizeof(buf), "w");
58 ATF_REQUIRE(fp != NULL);
60 /* Write to the buffer. */
61 nofw = fwrite(str, 1, sizeof(str), fp);
62 ATF_REQUIRE(nofw == sizeof(str));
64 /* Close the FILE *. */
68 /* Re-open the FILE * to read back the data. */
69 fp = fmemopen(buf, sizeof(buf), "r");
70 ATF_REQUIRE(fp != NULL);
72 /* Read from the buffer. */
73 bzero(buf2, sizeof(buf2));
74 nofr = fread(buf2, 1, sizeof(buf2), fp);
75 ATF_REQUIRE(nofr == sizeof(buf2));
78 * Since a write on a FILE * retrieved by fmemopen
79 * will add a '\0' (if there's space), we can check
80 * the strings for equality.
82 ATF_REQUIRE(strcmp(str, buf2) == 0);
84 /* Close the FILE *. */
88 /* Now open a FILE * on the first 4 bytes of the string. */
89 fp = fmemopen(str, 4, "w");
90 ATF_REQUIRE(fp != NULL);
93 * Try to write more bytes than we shoud, we'll get a short count (4).
95 nofw = fwrite(str2, 1, sizeof(str2), fp);
96 ATF_REQUIRE(nofw == 4);
98 /* Close the FILE *. */
101 /* Check that the string was not modified after the first 4 bytes. */
102 ATF_REQUIRE(strcmp(str, str3) == 0);
105 ATF_TC_WITHOUT_HEAD(test_autoalloc);
106 ATF_TC_BODY(test_autoalloc, tc)
109 * Let fmemopen allocate the buffer.
112 char str[] = "A quick test";
115 size_t nofw, nofr, i;
118 /* Open a FILE * using fmemopen. */
119 fp = fmemopen(NULL, 512, "w+");
120 ATF_REQUIRE(fp != NULL);
122 /* fill the buffer */
123 for (i = 0; i < 512; i++) {
124 nofw = fwrite("a", 1, 1, fp);
125 ATF_REQUIRE(nofw == 1);
128 /* Get the current position into the stream. */
130 ATF_REQUIRE(pos == 512);
133 * Try to write past the end, we should get a short object count (0)
135 nofw = fwrite("a", 1, 1, fp);
136 ATF_REQUIRE(nofw == 0);
138 /* Close the FILE *. */
140 ATF_REQUIRE(rc == 0);
142 /* Open a FILE * using a wrong mode */
143 fp = fmemopen(NULL, 512, "r");
144 ATF_REQUIRE(fp == NULL);
146 fp = fmemopen(NULL, 512, "w");
147 ATF_REQUIRE(fp == NULL);
150 ATF_TC_WITHOUT_HEAD(test_data_length);
151 ATF_TC_BODY(test_data_length, tc)
154 * Here we test that a read operation doesn't go past the end of the
155 * data actually written, and that a SEEK_END seeks from the end of the
156 * data, not of the whole buffer.
159 char buf[512] = {'\0'};
160 char str[] = "Test data length. ";
161 char str2[] = "Do we have two sentences?";
162 char str3[sizeof(str) + sizeof(str2) -1];
167 /* Open a FILE * for updating our buffer. */
168 fp = fmemopen(buf, sizeof(buf), "w+");
169 ATF_REQUIRE(fp != NULL);
171 /* Write our string into the buffer. */
172 nofw = fwrite(str, 1, sizeof(str), fp);
173 ATF_REQUIRE(nofw == sizeof(str));
176 * Now seek to the end and check that ftell
177 * gives us sizeof(str).
179 rc = fseek(fp, 0, SEEK_END);
180 ATF_REQUIRE(rc == 0);
182 ATF_REQUIRE(pos == sizeof(str));
184 /* Close the FILE *. */
186 ATF_REQUIRE(rc == 0);
188 /* Reopen the buffer for appending. */
189 fp = fmemopen(buf, sizeof(buf), "a+");
190 ATF_REQUIRE(fp != NULL);
192 /* We should now be writing after the first string. */
193 nofw = fwrite(str2, 1, sizeof(str2), fp);
194 ATF_REQUIRE(nofw == sizeof(str2));
196 /* Rewind the FILE *. */
197 rc = fseek(fp, 0, SEEK_SET);
198 ATF_REQUIRE(rc == 0);
200 /* Make sure we're at the beginning. */
202 ATF_REQUIRE(pos == 0);
204 /* Read the whole buffer. */
205 nofr = fread(str3, 1, sizeof(buf), fp);
206 ATF_REQUIRE(nofr == sizeof(str3));
208 /* Make sure the two strings are there. */
209 ATF_REQUIRE(strncmp(str3, str, sizeof(str) - 1) == 0);
210 ATF_REQUIRE(strncmp(str3 + sizeof(str) - 1, str2, sizeof(str2)) == 0);
212 /* Close the FILE *. */
214 ATF_REQUIRE(rc == 0);
217 ATF_TC_WITHOUT_HEAD(test_binary);
218 ATF_TC_BODY(test_binary, tc)
221 * Make sure that NULL bytes are never appended when opening a buffer
231 /* Pre-fill the buffer. */
232 memset(buf, 'A', sizeof(buf));
234 /* Open a FILE * in binary mode. */
235 fp = fmemopen(buf, sizeof(buf), "w+b");
236 ATF_REQUIRE(fp != NULL);
238 /* Write some data into it. */
239 nofw = fwrite(str, 1, strlen(str), fp);
240 ATF_REQUIRE(nofw == strlen(str));
242 /* Make sure that the buffer doesn't contain any NULL bytes. */
243 for (i = 0; i < sizeof(buf); i++)
244 ATF_REQUIRE(buf[i] != '\0');
246 /* Close the FILE *. */
248 ATF_REQUIRE(rc == 0);
251 ATF_TC_WITHOUT_HEAD(test_append_binary_pos);
252 ATF_TC_BODY(test_append_binary_pos, tc)
255 * For compatibility with other implementations (glibc), we set the
256 * position to 0 when opening an automatically allocated binary stream
262 fp = fmemopen(NULL, 16, "ab+");
263 ATF_REQUIRE(ftell(fp) == 0L);
267 * Make sure that a pre-allocated buffer behaves correctly.
269 char buf[] = "Hello";
270 fp = fmemopen(buf, sizeof(buf), "ab+");
271 ATF_REQUIRE(ftell(fp) == strlen(buf));
275 ATF_TC_WITHOUT_HEAD(test_size_0);
276 ATF_TC_BODY(test_size_0, tc)
279 * POSIX mandates that we return EINVAL if size is 0.
284 fp = fmemopen(NULL, 0, "r+");
285 ATF_REQUIRE(fp == NULL);
286 ATF_REQUIRE(errno == EINVAL);
292 ATF_TP_ADD_TC(tp, test_autoalloc);
293 ATF_TP_ADD_TC(tp, test_preexisting);
294 ATF_TP_ADD_TC(tp, test_data_length);
295 ATF_TP_ADD_TC(tp, test_binary);
296 ATF_TP_ADD_TC(tp, test_append_binary_pos);
297 ATF_TP_ADD_TC(tp, test_size_0);
299 return (atf_no_error());