1/*- 2Copyright (C) 2013 Pietro Cerutti <gahr@FreeBSD.org> 3 4Redistribution and use in source and binary forms, with or without 5modification, are permitted provided that the following conditions 6are met: 71. Redistributions of source code must retain the above copyright 8 notice, this list of conditions and the following disclaimer. 92. 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 13THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND 14ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE 17FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23SUCH 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__FBSDID("$FreeBSD$"); 33 34#include <errno.h> 35#include <stdio.h> 36#include <string.h> 37#include <strings.h> 38 39#include <atf-c.h> 40 41ATF_TC_WITHOUT_HEAD(test_preexisting); 42ATF_TC_BODY(test_preexisting, tc) 43{ 44 /* Use a pre-existing buffer. */ 45 char buf[512]; 46 char buf2[512]; 47 char str[] = "Test writing some stuff"; 48 char str2[] = "AAAAAAAAA"; 49 char str3[] = "AAAA writing some stuff"; 50 FILE *fp; 51 size_t nofw, nofr; 52 int rc; 53 54 /* Open a FILE * using fmemopen. */ 55 fp = fmemopen(buf, sizeof(buf), "w"); 56 ATF_REQUIRE(fp != NULL); 57 58 /* Write to the buffer. */ 59 nofw = fwrite(str, 1, sizeof(str), fp); 60 ATF_REQUIRE(nofw == sizeof(str)); 61 62 /* Close the FILE *. */ 63 rc = fclose(fp); 64 ATF_REQUIRE(rc == 0); 65 66 /* Re-open the FILE * to read back the data. */ 67 fp = fmemopen(buf, sizeof(buf), "r"); 68 ATF_REQUIRE(fp != NULL); 69 70 /* Read from the buffer. */ 71 bzero(buf2, sizeof(buf2)); 72 nofr = fread(buf2, 1, sizeof(buf2), fp); 73 ATF_REQUIRE(nofr == sizeof(buf2)); 74 75 /* 76 * Since a write on a FILE * retrieved by fmemopen 77 * will add a '\0' (if there's space), we can check 78 * the strings for equality. 79 */ 80 ATF_REQUIRE(strcmp(str, buf2) == 0); 81 82 /* Close the FILE *. */ 83 rc = fclose(fp); 84 ATF_REQUIRE(rc == 0); 85 86 /* Now open a FILE * on the first 4 bytes of the string. */ 87 fp = fmemopen(str, 4, "w"); 88 ATF_REQUIRE(fp != NULL); 89 90 /* 91 * Try to write more bytes than we shoud, we'll get a short count (4). 92 */ 93 nofw = fwrite(str2, 1, sizeof(str2), fp); 94 ATF_REQUIRE(nofw == 4); 95 96 /* Close the FILE *. */ 97 rc = fclose(fp); 98 ATF_REQUIRE(rc == 0); 99 100 /* Check that the string was not modified after the first 4 bytes. */ 101 ATF_REQUIRE(strcmp(str, str3) == 0); 102} 103 104ATF_TC_WITHOUT_HEAD(test_autoalloc); 105ATF_TC_BODY(test_autoalloc, tc) 106{ 107 /* Let fmemopen allocate the buffer. */ 108 FILE *fp; 109 long pos; 110 size_t nofw, i; 111 int rc; 112 113 /* Open a FILE * using fmemopen. */ 114 fp = fmemopen(NULL, 512, "w+"); 115 ATF_REQUIRE(fp != NULL); 116 117 /* fill the buffer */ 118 for (i = 0; i < 512; i++) { 119 nofw = fwrite("a", 1, 1, fp); 120 ATF_REQUIRE(nofw == 1); 121 } 122 123 /* Get the current position into the stream. */ 124 pos = ftell(fp); 125 ATF_REQUIRE(pos == 512); 126 127 /* Try to write past the end, we should get a short object count (0) */ 128 nofw = fwrite("a", 1, 1, fp); 129 ATF_REQUIRE(nofw == 0); 130 131 /* Close the FILE *. */ 132 rc = fclose(fp); 133 ATF_REQUIRE(rc == 0); 134 135 /* Open a FILE * using a wrong mode */ 136 fp = fmemopen(NULL, 512, "r"); 137 ATF_REQUIRE(fp == NULL); 138 139 fp = fmemopen(NULL, 512, "w"); 140 ATF_REQUIRE(fp == NULL); 141} 142 143ATF_TC_WITHOUT_HEAD(test_data_length); 144ATF_TC_BODY(test_data_length, tc) 145{ 146 /* 147 * Here we test that a read operation doesn't go past the end of the 148 * data actually written, and that a SEEK_END seeks from the end of the 149 * data, not of the whole buffer. 150 */ 151 FILE *fp; 152 char buf[512] = {'\0'}; 153 char str[] = "Test data length. "; 154 char str2[] = "Do we have two sentences?"; 155 char str3[sizeof(str) + sizeof(str2) -1]; 156 long pos; 157 size_t nofw, nofr; 158 int rc; 159 160 /* Open a FILE * for updating our buffer. */ 161 fp = fmemopen(buf, sizeof(buf), "w+"); 162 ATF_REQUIRE(fp != NULL); 163 164 /* Write our string into the buffer. */ 165 nofw = fwrite(str, 1, sizeof(str), fp); 166 ATF_REQUIRE(nofw == sizeof(str)); 167 168 /* Now seek to the end and check that ftell gives us sizeof(str). */ 169 rc = fseek(fp, 0, SEEK_END); 170 ATF_REQUIRE(rc == 0); 171 pos = ftell(fp); 172 ATF_REQUIRE(pos == sizeof(str)); 173 174 /* Close the FILE *. */ 175 rc = fclose(fp); 176 ATF_REQUIRE(rc == 0); 177 178 /* Reopen the buffer for appending. */ 179 fp = fmemopen(buf, sizeof(buf), "a+"); 180 ATF_REQUIRE(fp != NULL); 181 182 /* We should now be writing after the first string. */ 183 nofw = fwrite(str2, 1, sizeof(str2), fp); 184 ATF_REQUIRE(nofw == sizeof(str2)); 185 186 /* Rewind the FILE *. */ 187 rc = fseek(fp, 0, SEEK_SET); 188 ATF_REQUIRE(rc == 0); 189 190 /* Make sure we're at the beginning. */ 191 pos = ftell(fp); 192 ATF_REQUIRE(pos == 0); 193 194 /* Read the whole buffer. */ 195 nofr = fread(str3, 1, sizeof(buf), fp); 196 ATF_REQUIRE(nofr == sizeof(str3)); 197 198 /* Make sure the two strings are there. */ 199 ATF_REQUIRE(strncmp(str3, str, sizeof(str) - 1) == 0); 200 ATF_REQUIRE(strncmp(str3 + sizeof(str) - 1, str2, sizeof(str2)) == 0); 201 202 /* Close the FILE *. */ 203 rc = fclose(fp); 204 ATF_REQUIRE(rc == 0); 205} 206 207ATF_TC_WITHOUT_HEAD(test_binary); 208ATF_TC_BODY(test_binary, tc) 209{ 210 /* 211 * Make sure that NULL bytes are never appended when opening a buffer 212 * in binary mode. 213 */ 214 215 FILE *fp; 216 char buf[20]; 217 char str[] = "Test"; 218 size_t nofw; 219 int rc, i; 220 221 /* Pre-fill the buffer. */ 222 memset(buf, 'A', sizeof(buf)); 223 224 /* Open a FILE * in binary mode. */ 225 fp = fmemopen(buf, sizeof(buf), "w+b"); 226 ATF_REQUIRE(fp != NULL); 227 228 /* Write some data into it. */ 229 nofw = fwrite(str, 1, strlen(str), fp); 230 ATF_REQUIRE(nofw == strlen(str)); 231 232 /* Make sure that the buffer doesn't contain any NULL bytes. */ 233 for (i = 0; i < sizeof(buf); i++) 234 ATF_REQUIRE(buf[i] != '\0'); 235 236 /* Close the FILE *. */ 237 rc = fclose(fp); 238 ATF_REQUIRE(rc == 0); 239} 240 241ATF_TC_WITHOUT_HEAD(test_append_binary_pos); 242ATF_TC_BODY(test_append_binary_pos, tc) 243{ 244 /* 245 * For compatibility with other implementations (glibc), we set the 246 * position to 0 when opening an automatically allocated binary stream 247 * for appending. 248 */ 249 250 FILE *fp; 251 252 fp = fmemopen(NULL, 16, "ab+"); 253 ATF_REQUIRE(fp != NULL); 254 ATF_REQUIRE(ftell(fp) == 0L); 255 fclose(fp); 256 257 /* Make sure that a pre-allocated buffer behaves correctly. */ 258 char buf[] = "Hello"; 259 fp = fmemopen(buf, sizeof(buf), "ab+"); 260 ATF_REQUIRE(fp != NULL); 261 ATF_REQUIRE(ftell(fp) == strlen(buf)); 262 fclose(fp); 263} 264 265ATF_TC_WITHOUT_HEAD(test_size_0); 266ATF_TC_BODY(test_size_0, tc) 267{ 268 /* POSIX mandates that we return EINVAL if size is 0. */ 269 270 FILE *fp; 271 272 fp = fmemopen(NULL, 0, "r+"); 273 ATF_REQUIRE(fp == NULL); 274 ATF_REQUIRE(errno == EINVAL); 275} 276 277ATF_TP_ADD_TCS(tp) 278{ 279 280 ATF_TP_ADD_TC(tp, test_autoalloc); 281 ATF_TP_ADD_TC(tp, test_preexisting); 282 ATF_TP_ADD_TC(tp, test_data_length); 283 ATF_TP_ADD_TC(tp, test_binary); 284 ATF_TP_ADD_TC(tp, test_append_binary_pos); 285 ATF_TP_ADD_TC(tp, test_size_0); 286 287 return (atf_no_error()); 288} 289