tests/lib/libc/stdio/t_fopen.c

   1 /*      $NetBSD: t_fopen.c,v 1.3 2011/09/14 14:34:37 martin 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_fopen.c,v 1.3 2011/09/14 14:34:37 martin Exp $");
  33
  34 #include <atf-c.h>
  35 #include <errno.h>
  36 #include <fcntl.h>
  37 #include <limits.h>
  38 #include <paths.h>
  39 #include <stdio.h>
  40 #include <string.h>
  41 #include <unistd.h>
  42
  43 static const char *path = "fopen";
  44
  45 ATF_TC_WITH_CLEANUP(fdopen_close);
  46 ATF_TC_HEAD(fdopen_close, tc)
  47 {
  48         atf_tc_set_md_var(tc, "descr", "See that descriptors are closed");
  49 }
  50
  51 ATF_TC_BODY(fdopen_close, tc)
  52 {
  53         FILE *f;
  54         int fd;
  55
  56         /*
  57          * Check that the file descriptor
  58          * used to fdopen(3) a stream is
  59          * closed once the stream is closed.
  60          */
  61         fd = open(path, O_RDWR | O_CREAT);
  62
  63         ATF_REQUIRE(fd >= 0);
  64
  65         f = fdopen(fd, "w+");
  66
  67         ATF_REQUIRE(f != NULL);
  68         ATF_REQUIRE(fclose(f) == 0);
  69         ATF_REQUIRE(close(fd) == -1);
  70         ATF_REQUIRE(unlink(path) == 0);
  71 }
  72
  73 ATF_TC_CLEANUP(fdopen_close, tc)
  74 {
  75         (void)unlink(path);
  76 }
  77
  78 ATF_TC_WITH_CLEANUP(fdopen_err);
  79 ATF_TC_HEAD(fdopen_err, tc)
  80 {
  81         atf_tc_set_md_var(tc, "descr", "Test errors from fdopen(3)");
  82 }
  83
  84 ATF_TC_BODY(fdopen_err, tc)
  85 {
  86         int fd;
  87
  88         fd = open(path, O_RDONLY | O_CREAT);
  89         ATF_REQUIRE(fd >= 0);
  90
  91         errno = 0;
  92         ATF_REQUIRE_ERRNO(EINVAL, fdopen(fd, "w") == NULL);
  93
  94         errno = 0;
  95         ATF_REQUIRE_ERRNO(EINVAL, fdopen(fd, "a") == NULL);
  96
  97         ATF_REQUIRE(close(fd) == 0);
  98
  99         errno = 0;
 100         ATF_REQUIRE_ERRNO(EBADF, fdopen(fd, "r") == NULL);
 101
 102         errno = 0;
 103         ATF_REQUIRE_ERRNO(EBADF, fdopen(-1, "w+") == NULL);
 104
 105         (void)unlink(path);
 106 }
 107
 108 ATF_TC_CLEANUP(fdopen_err, tc)
 109 {
 110         (void)unlink(path);
 111 }
 112
 113 ATF_TC_WITH_CLEANUP(fdopen_seek);
 114 ATF_TC_HEAD(fdopen_seek, tc)
 115 {
 116         atf_tc_set_md_var(tc, "descr", "Test stream position with fdopen(3)");
 117 }
 118
 119 ATF_TC_BODY(fdopen_seek, tc)
 120 {
 121         FILE *f;
 122         int fd;
 123
 124         /*
 125          * Verify that the file position associated
 126          * with the stream corresponds with the offset
 127          * set earlier for the file descriptor.
 128          */
 129         fd = open(path, O_RDWR | O_CREAT);
 130
 131         ATF_REQUIRE(fd >= 0);
 132         ATF_REQUIRE(write(fd, "garbage", 7) == 7);
 133         ATF_REQUIRE(lseek(fd, 3, SEEK_SET) == 3);
 134
 135         f = fdopen(fd, "r+");
 136
 137         ATF_REQUIRE(f != NULL);
 138         ATF_REQUIRE(ftell(f) == 3);
 139         ATF_REQUIRE(fclose(f) == 0);
 140         ATF_REQUIRE(unlink(path) == 0);
 141 }
 142
 143 ATF_TC_CLEANUP(fdopen_seek, tc)
 144 {
 145         (void)unlink(path);
 146 }
 147
 148 ATF_TC_WITH_CLEANUP(fopen_err);
 149 ATF_TC_HEAD(fopen_err, tc)
 150 {
 151         atf_tc_set_md_var(tc, "descr", "Test errors from fopen(3)");
 152 }
 153
 154 ATF_TC_BODY(fopen_err, tc)
 155 {
 156         static const char *mode[] = {
 157                 "x", "xr", "xr", "+r+", "R", "W+", " aXX", "Xr", " r+", "" };
 158
 159         char buf[PATH_MAX + 1];
 160         size_t i;
 161         FILE *f;
 162
 163         f = fopen(path, "w+");
 164
 165         ATF_REQUIRE(f != NULL);
 166         ATF_REQUIRE(fclose(f) == 0);
 167
 168         /*
 169          * Note that also "invalid" characters
 170          * may follow the mode-string whenever
 171          * the first character is valid.
 172          */
 173         for (i = 0; i < __arraycount(mode); i++) {
 174
 175                 errno = 0;
 176                 f = fopen(path, mode[i]);
 177
 178                 if (f == NULL && errno == EINVAL)
 179                         continue;
 180
 181                 if (f != NULL)
 182                         (void)fclose(f);
 183
 184                 atf_tc_fail_nonfatal("opened file as '%s'",  mode[i]);
 185         }
 186
 187         (void)unlink(path);
 188         (void)memset(buf, 'x', sizeof(buf));
 189
 190         errno = 0;
 191         ATF_REQUIRE_ERRNO(EISDIR, fopen("/usr/bin", "w") == NULL);
 192
 193         errno = 0;
 194         ATF_REQUIRE_ERRNO(ENOENT, fopen("/a/b/c/d/e/f", "r") == NULL);
 195
 196         errno = 0;
 197         ATF_REQUIRE_ERRNO(ENAMETOOLONG, fopen(buf, "r+") == NULL);
 198 }
 199
 200 ATF_TC_CLEANUP(fopen_err, tc)
 201 {
 202         (void)unlink(path);
 203 }
 204
 205 ATF_TC_WITH_CLEANUP(fopen_append);
 206 ATF_TC_HEAD(fopen_append, tc)
 207 {
 208         atf_tc_set_md_var(tc, "descr", "Test that append-mode works");
 209 }
 210
 211 ATF_TC_BODY(fopen_append, tc)
 212 {
 213         char buf[15];
 214         FILE *f;
 215
 216         (void)memset(buf, 'x', sizeof(buf));
 217
 218         f = fopen(path, "w+");
 219
 220         ATF_REQUIRE(f != NULL);
 221         ATF_REQUIRE(fwrite("garbage", 1, 7, f) == 7);
 222         ATF_REQUIRE(fclose(f) == 0);
 223
 224         f = fopen(path, "a");
 225
 226         ATF_REQUIRE(fwrite("garbage", 1, 7, f) == 7);
 227         ATF_REQUIRE(fclose(f) == 0);
 228
 229         f = fopen(path, "r");
 230
 231         ATF_REQUIRE(fread(buf, 1, sizeof(buf), f) == 14);
 232         ATF_REQUIRE(strncmp(buf, "garbagegarbage", 14) == 0);
 233
 234         ATF_REQUIRE(fclose(f) == 0);
 235         ATF_REQUIRE(unlink(path) == 0);
 236 }
 237
 238 ATF_TC_CLEANUP(fopen_append, tc)
 239 {
 240         (void)unlink(path);
 241 }
 242
 243 ATF_TC_WITH_CLEANUP(fopen_mode);
 244 ATF_TC_HEAD(fopen_mode, tc)
 245 {
 246         atf_tc_set_md_var(tc, "descr", "Test fopen(3) modes");
 247 }
 248
 249 ATF_TC_BODY(fopen_mode, tc)
 250 {
 251         size_t i;
 252         FILE *f;
 253
 254         static const char *mode[] = {
 255                 "r", "r+", "w", "w+", "a", "a+",
 256                 "rb", "r+b", "wb", "w+b", "ab", "a+b"
 257                 "re", "r+e", "we", "w+e", "ae", "a+e"
 258                 "rf", "r+f", "wf", "w+f", "af", "a+f"
 259         };
 260
 261         f = fopen(path, "w+");
 262
 263         ATF_REQUIRE(f != NULL);
 264         ATF_REQUIRE(fclose(f) == 0);
 265
 266         /*
 267          * Verify that various modes work.
 268          */
 269         for (i = 0; i < __arraycount(mode); i++) {
 270
 271                 f = fopen(path, mode[i]);
 272
 273                 if (f != NULL) {
 274                         ATF_REQUIRE(fclose(f) == 0);
 275                         continue;
 276                 }
 277
 278                 atf_tc_fail_nonfatal("failed to open file as %s",  mode[i]);
 279         }
 280
 281         (void)unlink(path);
 282 }
 283
 284 ATF_TC_CLEANUP(fopen_mode, tc)
 285 {
 286         (void)unlink(path);
 287 }
 288
 289 ATF_TC(fopen_perm);
 290 ATF_TC_HEAD(fopen_perm, tc)
 291 {
 292         atf_tc_set_md_var(tc, "descr", "Test permissions with fopen(3)");
 293         atf_tc_set_md_var(tc, "require.user", "unprivileged");
 294 }
 295
 296 ATF_TC_BODY(fopen_perm, tc)
 297 {
 298
 299         errno = 0;
 300         ATF_REQUIRE_ERRNO(EACCES, fopen("/bin/ls", "a+") == NULL);
 301
 302         errno = 0;
 303         ATF_REQUIRE_ERRNO(EACCES, fopen("/bin/ls", "w+") == NULL);
 304 }
 305
 306 ATF_TC(fopen_regular);
 307 ATF_TC_HEAD(fopen_regular, tc)
 308 {
 309         atf_tc_set_md_var(tc, "descr", "Test fopen(3) with 'f' mode");
 310 }
 311
 312 ATF_TC_BODY(fopen_regular, tc)
 313 {
 314         static const char *mode[] = { "rf", "r+f", "wf", "w+f", "af", "a+f" };
 315         static const char *devs[] = { _PATH_DEVNULL };
 316
 317         size_t i, j;
 318         FILE *f;
 319
 320         for (i = 0; i < __arraycount(devs); i++) {
 321
 322                 for (j = 0; j < __arraycount(mode); j++) {
 323
 324                         errno = 0;
 325                         f = fopen(devs[i], mode[j]);
 326
 327                         if (f == NULL && errno == EFTYPE)
 328                                 continue;
 329
 330                         if (f != NULL)
 331                                 (void)fclose(f);
 332
 333                         atf_tc_fail_nonfatal("opened %s as %s",
 334                             devs[i], mode[j]);
 335                 }
 336         }
 337 }
 338
 339 ATF_TC_WITH_CLEANUP(fopen_seek);
 340 ATF_TC_HEAD(fopen_seek, tc)
 341 {
 342         atf_tc_set_md_var(tc, "descr", "Test initial stream position");
 343 }
 344
 345 ATF_TC_BODY(fopen_seek, tc)
 346 {
 347         FILE *f;
 348
 349         f = fopen(path, "w+");
 350
 351         ATF_REQUIRE(f != NULL);
 352         ATF_REQUIRE(fwrite("garbage", 1, 7, f) == 7);
 353         ATF_REQUIRE(fclose(f) == 0);
 354
 355         /*
 356          * The position of the stream should be
 357          * at the start, except for append-mode.
 358          */
 359         f = fopen(path, "r");
 360
 361         ATF_REQUIRE(f != NULL);
 362         ATF_REQUIRE(ftello(f) == 0);
 363         ATF_REQUIRE(fclose(f) == 0);
 364
 365         f = fopen(path, "a");
 366
 367         ATF_REQUIRE(f != NULL);
 368         ATF_REQUIRE(ftello(f) == 7);
 369         ATF_REQUIRE(fclose(f) == 0);
 370         ATF_REQUIRE(unlink(path) == 0);
 371 }
 372
 373 ATF_TC_CLEANUP(fopen_seek, tc)
 374 {
 375         (void)unlink(path);
 376 }
 377
 378 ATF_TC_WITH_CLEANUP(freopen_std);
 379 ATF_TC_HEAD(freopen_std, tc)
 380 {
 381         atf_tc_set_md_var(tc, "descr", "A basic test of freopen(3)");
 382 }
 383
 384 ATF_TC_BODY(freopen_std, tc)
 385 {
 386         FILE *std[2] = { stdin, stdout };
 387         char buf[15];
 388         size_t i;
 389         FILE *f;
 390
 391         /*
 392          * Associate a standard stream with a custom stream.
 393          * Then write to the standard stream and verify that
 394          * the result now appears in the custom stream.
 395          */
 396         for (i = 0; i < __arraycount(std); i++) {
 397
 398                 (void)memset(buf, 'x', sizeof(buf));
 399
 400                 f = fopen(path, "w+");
 401                 ATF_REQUIRE(f != NULL);
 402
 403                 f = freopen(path, "w+", std[i]);
 404                 ATF_REQUIRE(f != NULL);
 405
 406                 ATF_REQUIRE(fwrite("garbage", 1, 7, f) == 7);
 407                 ATF_REQUIRE(fprintf(std[i], "garbage") == 7);
 408                 ATF_REQUIRE(fclose(f) == 0);
 409
 410                 f = fopen(path, "r");
 411
 412                 ATF_REQUIRE(f != NULL);
 413                 ATF_REQUIRE(fread(buf, 1, sizeof(buf), f) == 14);
 414                 ATF_REQUIRE(strncmp(buf, "garbagegarbage", 14) == 0);
 415
 416                 ATF_REQUIRE(fclose(f) == 0);
 417         }
 418
 419         ATF_REQUIRE(unlink(path) == 0);
 420 }
 421
 422 ATF_TC_CLEANUP(freopen_std, tc)
 423 {
 424         (void)unlink(path);
 425 }
 426
 427 ATF_TP_ADD_TCS(tp)
 428 {
 429
 430         ATF_TP_ADD_TC(tp, fdopen_close);
 431         ATF_TP_ADD_TC(tp, fdopen_err);
 432         ATF_TP_ADD_TC(tp, fdopen_seek);
 433         ATF_TP_ADD_TC(tp, fopen_append);
 434         ATF_TP_ADD_TC(tp, fopen_err);
 435         ATF_TP_ADD_TC(tp, fopen_mode);
 436         ATF_TP_ADD_TC(tp, fopen_perm);
 437         ATF_TP_ADD_TC(tp, fopen_regular);
 438         ATF_TP_ADD_TC(tp, fopen_seek);
 439         ATF_TP_ADD_TC(tp, freopen_std);
 440
 441         return atf_no_error();
 442 }