tests/lib/libc/sys/t_dup.c

   1 /* $NetBSD: t_dup.c,v 1.8 2012/03/18 07:00:51 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_dup.c,v 1.8 2012/03/18 07:00:51 jruoho Exp $");
  33
  34 #include <sys/resource.h>
  35 #include <sys/stat.h>
  36 #include <sys/wait.h>
  37
  38 #include <atf-c.h>
  39 #include <errno.h>
  40 #include <fcntl.h>
  41 #include <limits.h>
  42 #include <stdio.h>
  43 #include <stdlib.h>
  44 #include <string.h>
  45 #include <unistd.h>
  46 #include <sysexits.h>
  47
  48 static char     path[] = "dup";
  49 static void     check_mode(bool, bool, bool);
  50
  51 static void
  52 check_mode(bool _dup, bool _dup2, bool _dup3)
  53 {
  54         int mode[3] = { O_RDONLY, O_WRONLY, O_RDWR   };
  55         int perm[5] = { 0700, 0400, 0600, 0444, 0666 };
  56         struct stat st, st1;
  57         int fd, fd1, fd2;
  58         size_t i, j;
  59
  60         /*
  61          * Check that a duplicated descriptor
  62          * retains the mode of the original file.
  63          */
  64         for (i = 0; i < __arraycount(mode); i++) {
  65
  66                 for (j = 0; j < __arraycount(perm); j++) {
  67
  68                         fd1 = open(path, mode[i] | O_CREAT, perm[j]);
  69                         fd2 = open("/etc/passwd", O_RDONLY);
  70
  71                         ATF_REQUIRE(fd1 >= 0);
  72                         ATF_REQUIRE(fd2 >= 0);
  73
  74                         if (_dup != false)
  75                                 fd = dup(fd1);
  76                         else if (_dup2 != false)
  77                                 fd = dup2(fd1, fd2);
  78                         else if (_dup3 != false)
  79                                 fd = dup3(fd1, fd2, O_CLOEXEC);
  80                         else {
  81                                 fd = -1;
  82                         }
  83
  84                         ATF_REQUIRE(fd >= 0);
  85
  86                         (void)memset(&st, 0, sizeof(struct stat));
  87                         (void)memset(&st1, 0, sizeof(struct stat));
  88
  89                         ATF_REQUIRE(fstat(fd, &st) == 0);
  90                         ATF_REQUIRE(fstat(fd1, &st1) == 0);
  91
  92                         if (st.st_mode != st1.st_mode)
  93                                 atf_tc_fail("invalid mode");
  94
  95                         (void)close(fd);
  96                         (void)close(fd1);
  97                         (void)close(fd2);
  98                         (void)unlink(path);
  99                 }
 100         }
 101 }
 102
 103 ATF_TC(dup2_basic);
 104 ATF_TC_HEAD(dup2_basic, tc)
 105 {
 106         atf_tc_set_md_var(tc, "descr", "A basic test of dup2(2)");
 107 }
 108
 109 ATF_TC_BODY(dup2_basic, tc)
 110 {
 111         int fd, fd1, fd2;
 112
 113         fd1 = open("/etc/passwd", O_RDONLY);
 114         fd2 = open("/etc/passwd", O_RDONLY);
 115
 116         ATF_REQUIRE(fd1 >= 0);
 117         ATF_REQUIRE(fd2 >= 0);
 118
 119         fd = dup2(fd1, fd2);
 120         ATF_REQUIRE(fd >= 0);
 121
 122         if (fd != fd2)
 123                 atf_tc_fail("invalid descriptor");
 124
 125         (void)close(fd);
 126         (void)close(fd1);
 127
 128         ATF_REQUIRE(close(fd2) != 0);
 129 }
 130
 131 ATF_TC(dup2_err);
 132 ATF_TC_HEAD(dup2_err, tc)
 133 {
 134         atf_tc_set_md_var(tc, "descr", "Test error conditions of dup2(2)");
 135 }
 136
 137 ATF_TC_BODY(dup2_err, tc)
 138 {
 139         int fd;
 140
 141         fd = open("/etc/passwd", O_RDONLY);
 142         ATF_REQUIRE(fd >= 0);
 143
 144         errno = 0;
 145         ATF_REQUIRE_ERRNO(EBADF, dup2(-1, -1) == -1);
 146
 147         errno = 0;
 148         ATF_REQUIRE_ERRNO(EBADF, dup2(fd, -1) == -1);
 149
 150         errno = 0;
 151         ATF_REQUIRE_ERRNO(EBADF, dup2(-1, fd) == -1);
 152
 153         /*
 154          * Note that this should not fail with EINVAL.
 155          */
 156         ATF_REQUIRE(dup2(fd, fd) != -1);
 157
 158         (void)close(fd);
 159 }
 160
 161 ATF_TC(dup2_max);
 162 ATF_TC_HEAD(dup2_max, tc)
 163 {
 164         atf_tc_set_md_var(tc, "descr", "Test dup2(2) against limits");
 165 }
 166
 167 ATF_TC_BODY(dup2_max, tc)
 168 {
 169         struct rlimit res;
 170
 171         (void)memset(&res, 0, sizeof(struct rlimit));
 172         (void)getrlimit(RLIMIT_NOFILE, &res);
 173
 174         errno = 0;
 175         ATF_REQUIRE_ERRNO(EBADF, dup2(STDERR_FILENO, res.rlim_cur + 1) == -1);
 176 }
 177
 178 ATF_TC_WITH_CLEANUP(dup2_mode);
 179 ATF_TC_HEAD(dup2_mode, tc)
 180 {
 181         atf_tc_set_md_var(tc, "descr", "A basic test of dup2(2)");
 182 }
 183
 184 ATF_TC_BODY(dup2_mode, tc)
 185 {
 186         check_mode(false, true, false);
 187 }
 188
 189 ATF_TC_CLEANUP(dup2_mode, tc)
 190 {
 191         (void)unlink(path);
 192 }
 193
 194
 195 ATF_TC(dup3_err);
 196 ATF_TC_HEAD(dup3_err, tc)
 197 {
 198         atf_tc_set_md_var(tc, "descr",
 199             "Test error conditions of dup3(2) (PR lib/45148)");
 200 }
 201
 202 ATF_TC_BODY(dup3_err, tc)
 203 {
 204         int fd;
 205
 206         fd = open("/etc/passwd", O_RDONLY);
 207         ATF_REQUIRE(fd >= 0);
 208
 209         errno = 0;
 210         ATF_REQUIRE(dup3(fd, fd, O_CLOEXEC) != -1);
 211
 212         errno = 0;
 213         ATF_REQUIRE_ERRNO(EBADF, dup3(-1, -1, O_CLOEXEC) == -1);
 214
 215         errno = 0;
 216         ATF_REQUIRE_ERRNO(EBADF, dup3(fd, -1, O_CLOEXEC) == -1);
 217
 218         errno = 0;
 219         ATF_REQUIRE_ERRNO(EBADF, dup3(-1, fd, O_CLOEXEC) == -1);
 220
 221         errno = 0;
 222         ATF_REQUIRE_ERRNO(EINVAL, dup3(fd, 1, O_NOFOLLOW) == -1);
 223
 224         (void)close(fd);
 225 }
 226
 227 ATF_TC(dup3_max);
 228 ATF_TC_HEAD(dup3_max, tc)
 229 {
 230         atf_tc_set_md_var(tc, "descr", "Test dup3(2) against limits");
 231 }
 232
 233 ATF_TC_BODY(dup3_max, tc)
 234 {
 235         struct rlimit res;
 236
 237         (void)memset(&res, 0, sizeof(struct rlimit));
 238         (void)getrlimit(RLIMIT_NOFILE, &res);
 239
 240         errno = 0;
 241         ATF_REQUIRE_ERRNO(EBADF, dup3(STDERR_FILENO,
 242                 res.rlim_cur + 1, O_CLOEXEC) == -1);
 243 }
 244
 245 ATF_TC_WITH_CLEANUP(dup3_mode);
 246 ATF_TC_HEAD(dup3_mode, tc)
 247 {
 248         atf_tc_set_md_var(tc, "descr", "A basic test of dup3(2)");
 249 }
 250
 251 ATF_TC_BODY(dup3_mode, tc)
 252 {
 253         check_mode(false, false, true);
 254 }
 255
 256 ATF_TC_CLEANUP(dup3_mode, tc)
 257 {
 258         (void)unlink(path);
 259 }
 260
 261 ATF_TC(dup_err);
 262 ATF_TC_HEAD(dup_err, tc)
 263 {
 264         atf_tc_set_md_var(tc, "descr", "Test error conditions of dup(2)");
 265 }
 266
 267 ATF_TC_BODY(dup_err, tc)
 268 {
 269
 270         errno = 0;
 271         ATF_REQUIRE_ERRNO(EBADF, dup(-1) == -1);
 272 }
 273
 274 ATF_TC_WITH_CLEANUP(dup_max);
 275 ATF_TC_HEAD(dup_max, tc)
 276 {
 277         atf_tc_set_md_var(tc, "descr", "Test dup(2) against limits");
 278 }
 279
 280 ATF_TC_BODY(dup_max, tc)
 281 {
 282         struct rlimit res;
 283         int *buf, fd, sta;
 284         size_t i, n;
 285         pid_t pid;
 286
 287         pid = fork();
 288         ATF_REQUIRE(pid >= 0);
 289
 290         if (pid == 0) {
 291
 292                 /*
 293                  * Open a temporary file until the
 294                  * maximum number of open files is
 295                  * reached. Ater that dup(2) family
 296                  * should fail with EMFILE.
 297                  */
 298                 (void)closefrom(0);
 299                 (void)memset(&res, 0, sizeof(struct rlimit));
 300
 301                 n = 10;
 302                 res.rlim_cur = res.rlim_max = n;
 303                 if (setrlimit(RLIMIT_NOFILE, &res) != 0)
 304                         _exit(EX_OSERR);
 305
 306                 buf = calloc(n, sizeof(int));
 307
 308                 if (buf == NULL)
 309                         _exit(EX_OSERR);
 310
 311                 buf[0] = mkstemp(path);
 312
 313                 if (buf[0] < 0)
 314                         _exit(EX_OSERR);
 315
 316                 for (i = 1; i < n; i++) {
 317
 318                         buf[i] = open(path, O_RDONLY);
 319
 320                         if (buf[i] < 0)
 321                                 _exit(EX_OSERR);
 322                 }
 323
 324                 errno = 0;
 325                 fd = dup(buf[0]);
 326
 327                 if (fd != -1 || errno != EMFILE)
 328                         _exit(EX_DATAERR);
 329
 330                 _exit(EXIT_SUCCESS);
 331         }
 332
 333         (void)wait(&sta);
 334
 335         if (WIFEXITED(sta) == 0 || WEXITSTATUS(sta) != EXIT_SUCCESS) {
 336
 337                 if (WEXITSTATUS(sta) == EX_OSERR)
 338                         atf_tc_fail("system call error");
 339
 340                 if (WEXITSTATUS(sta) == EX_DATAERR)
 341                         atf_tc_fail("dup(2) dupped more than RLIMIT_NOFILE");
 342
 343                 atf_tc_fail("unknown error");
 344         }
 345
 346         (void)unlink(path);
 347 }
 348
 349 ATF_TC_CLEANUP(dup_max, tc)
 350 {
 351         (void)unlink(path);
 352 }
 353
 354 ATF_TC_WITH_CLEANUP(dup_mode);
 355 ATF_TC_HEAD(dup_mode, tc)
 356 {
 357         atf_tc_set_md_var(tc, "descr", "A basic test of dup(2)");
 358 }
 359
 360 ATF_TC_BODY(dup_mode, tc)
 361 {
 362         check_mode(true, false, false);
 363 }
 364
 365 ATF_TC_CLEANUP(dup_mode, tc)
 366 {
 367         (void)unlink(path);
 368 }
 369
 370 ATF_TP_ADD_TCS(tp)
 371 {
 372
 373         ATF_TP_ADD_TC(tp, dup2_basic);
 374         ATF_TP_ADD_TC(tp, dup2_err);
 375         ATF_TP_ADD_TC(tp, dup2_max);
 376         ATF_TP_ADD_TC(tp, dup2_mode);
 377         ATF_TP_ADD_TC(tp, dup3_err);
 378         ATF_TP_ADD_TC(tp, dup3_max);
 379         ATF_TP_ADD_TC(tp, dup3_mode);
 380         ATF_TP_ADD_TC(tp, dup_err);
 381         ATF_TP_ADD_TC(tp, dup_max);
 382         ATF_TP_ADD_TC(tp, dup_mode);
 383
 384         return atf_no_error();
 385 }