1 /* $OpenBSD: t_dup.c,v 1.1.1.1 2019/11/19 19:57:03 bluhm Exp $ */ 2 /* $NetBSD: t_dup.c,v 1.9 2017/01/13 20:31:53 christos Exp $ */ 3 4 /*- 5 * Copyright (c) 2011 The NetBSD Foundation, Inc. 6 * All rights reserved. 7 * 8 * This code is derived from software contributed to The NetBSD Foundation 9 * by Jukka Ruohonen. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 #include "macros.h" 34 35 #include <sys/cdefs.h> 36 __RCSID("$NetBSD: t_dup.c,v 1.9 2017/01/13 20:31:53 christos Exp $"); 37 38 #include <sys/resource.h> 39 #include <sys/stat.h> 40 #include <sys/wait.h> 41 42 #include "atf-c.h" 43 #include <errno.h> 44 #include <fcntl.h> 45 #include <limits.h> 46 #include <stdbool.h> 47 #include <stdio.h> 48 #include <stdlib.h> 49 #include <string.h> 50 #include <unistd.h> 51 #include <sysexits.h> 52 53 static char path[] = "dup"; 54 static void check_mode(bool, bool, bool); 55 56 static void 57 check_mode(bool _dup, bool _dup2, bool _dup3) 58 { 59 int mode[3] = { O_RDONLY, O_WRONLY, O_RDWR }; 60 int perm[5] = { 0700, 0400, 0600, 0444, 0666 }; 61 struct stat st, st1; 62 int fd, fd1, fd2; 63 size_t i, j; 64 65 /* 66 * Check that a duplicated descriptor 67 * retains the mode of the original file. 68 */ 69 for (i = 0; i < __arraycount(mode); i++) { 70 71 for (j = 0; j < __arraycount(perm); j++) { 72 73 fd1 = open(path, mode[i] | O_CREAT, perm[j]); 74 fd2 = open("/etc/passwd", O_RDONLY); 75 76 ATF_REQUIRE(fd1 >= 0); 77 ATF_REQUIRE(fd2 >= 0); 78 79 if (_dup != false) 80 fd = dup(fd1); 81 else if (_dup2 != false) 82 fd = dup2(fd1, fd2); 83 else if (_dup3 != false) 84 fd = dup3(fd1, fd2, O_CLOEXEC); 85 else { 86 fd = -1; 87 } 88 89 ATF_REQUIRE(fd >= 0); 90 91 (void)memset(&st, 0, sizeof(struct stat)); 92 (void)memset(&st1, 0, sizeof(struct stat)); 93 94 ATF_REQUIRE(fstat(fd, &st) == 0); 95 ATF_REQUIRE(fstat(fd1, &st1) == 0); 96 97 if (st.st_mode != st1.st_mode) 98 atf_tc_fail("invalid mode"); 99 100 (void)close(fd); 101 (void)close(fd1); 102 (void)close(fd2); 103 (void)unlink(path); 104 } 105 } 106 } 107 108 ATF_TC(dup2_basic); 109 ATF_TC_HEAD(dup2_basic, tc) 110 { 111 atf_tc_set_md_var(tc, "descr", "A basic test of dup2(2)"); 112 } 113 114 ATF_TC_BODY(dup2_basic, tc) 115 { 116 int fd, fd1, fd2; 117 118 fd1 = open("/etc/passwd", O_RDONLY); 119 fd2 = open("/etc/passwd", O_RDONLY); 120 121 ATF_REQUIRE(fd1 >= 0); 122 ATF_REQUIRE(fd2 >= 0); 123 124 fd = dup2(fd1, fd2); 125 ATF_REQUIRE(fd >= 0); 126 127 if (fd != fd2) 128 atf_tc_fail("invalid descriptor"); 129 130 (void)close(fd); 131 (void)close(fd1); 132 133 ATF_REQUIRE(close(fd2) != 0); 134 } 135 136 ATF_TC(dup2_err); 137 ATF_TC_HEAD(dup2_err, tc) 138 { 139 atf_tc_set_md_var(tc, "descr", "Test error conditions of dup2(2)"); 140 } 141 142 ATF_TC_BODY(dup2_err, tc) 143 { 144 int fd; 145 146 fd = open("/etc/passwd", O_RDONLY); 147 ATF_REQUIRE(fd >= 0); 148 149 errno = 0; 150 ATF_REQUIRE_ERRNO(EBADF, dup2(-1, -1) == -1); 151 152 errno = 0; 153 ATF_REQUIRE_ERRNO(EBADF, dup2(fd, -1) == -1); 154 155 errno = 0; 156 ATF_REQUIRE_ERRNO(EBADF, dup2(-1, fd) == -1); 157 158 /* 159 * Note that this should not fail with EINVAL. 160 */ 161 ATF_REQUIRE(dup2(fd, fd) != -1); 162 163 (void)close(fd); 164 } 165 166 ATF_TC(dup2_max); 167 ATF_TC_HEAD(dup2_max, tc) 168 { 169 atf_tc_set_md_var(tc, "descr", "Test dup2(2) against limits"); 170 } 171 172 ATF_TC_BODY(dup2_max, tc) 173 { 174 struct rlimit res; 175 176 (void)memset(&res, 0, sizeof(struct rlimit)); 177 (void)getrlimit(RLIMIT_NOFILE, &res); 178 179 errno = 0; 180 ATF_REQUIRE_ERRNO(EBADF, dup2(STDERR_FILENO, res.rlim_cur + 1) == -1); 181 } 182 183 ATF_TC_WITH_CLEANUP(dup2_mode); 184 ATF_TC_HEAD(dup2_mode, tc) 185 { 186 atf_tc_set_md_var(tc, "descr", "A basic test of dup2(2)"); 187 } 188 189 ATF_TC_BODY(dup2_mode, tc) 190 { 191 check_mode(false, true, false); 192 } 193 194 ATF_TC_CLEANUP(dup2_mode, tc) 195 { 196 (void)unlink(path); 197 } 198 199 200 ATF_TC(dup3_err); 201 ATF_TC_HEAD(dup3_err, tc) 202 { 203 atf_tc_set_md_var(tc, "descr", 204 "Test error conditions of dup3(2) (PR lib/45148)"); 205 } 206 207 ATF_TC_BODY(dup3_err, tc) 208 { 209 int fd; 210 211 fd = open("/etc/passwd", O_RDONLY); 212 ATF_REQUIRE(fd >= 0); 213 214 errno = 0; 215 /* Adjusted for OpenBSD, initially != -1 */ 216 ATF_REQUIRE(dup3(fd, fd, O_CLOEXEC) == -1); 217 218 errno = 0; 219 /* Adjusted for OpenBSD, initially EBADF */ 220 ATF_REQUIRE_ERRNO(EINVAL, dup3(-1, -1, O_CLOEXEC) == -1); 221 222 errno = 0; 223 ATF_REQUIRE_ERRNO(EBADF, dup3(fd, -1, O_CLOEXEC) == -1); 224 225 errno = 0; 226 ATF_REQUIRE_ERRNO(EBADF, dup3(-1, fd, O_CLOEXEC) == -1); 227 228 errno = 0; 229 ATF_REQUIRE_ERRNO(EINVAL, dup3(fd, 1, O_NOFOLLOW) == -1); 230 231 (void)close(fd); 232 } 233 234 ATF_TC(dup3_max); 235 ATF_TC_HEAD(dup3_max, tc) 236 { 237 atf_tc_set_md_var(tc, "descr", "Test dup3(2) against limits"); 238 } 239 240 ATF_TC_BODY(dup3_max, tc) 241 { 242 struct rlimit res; 243 244 (void)memset(&res, 0, sizeof(struct rlimit)); 245 (void)getrlimit(RLIMIT_NOFILE, &res); 246 247 errno = 0; 248 ATF_REQUIRE_ERRNO(EBADF, dup3(STDERR_FILENO, 249 res.rlim_cur + 1, O_CLOEXEC) == -1); 250 } 251 252 ATF_TC_WITH_CLEANUP(dup3_mode); 253 ATF_TC_HEAD(dup3_mode, tc) 254 { 255 atf_tc_set_md_var(tc, "descr", "A basic test of dup3(2)"); 256 } 257 258 ATF_TC_BODY(dup3_mode, tc) 259 { 260 check_mode(false, false, true); 261 } 262 263 ATF_TC_CLEANUP(dup3_mode, tc) 264 { 265 (void)unlink(path); 266 } 267 268 ATF_TC(dup_err); 269 ATF_TC_HEAD(dup_err, tc) 270 { 271 atf_tc_set_md_var(tc, "descr", "Test error conditions of dup(2)"); 272 } 273 274 ATF_TC_BODY(dup_err, tc) 275 { 276 277 errno = 0; 278 ATF_REQUIRE_ERRNO(EBADF, dup(-1) == -1); 279 } 280 281 ATF_TC_WITH_CLEANUP(dup_max); 282 ATF_TC_HEAD(dup_max, tc) 283 { 284 atf_tc_set_md_var(tc, "descr", "Test dup(2) against limits"); 285 } 286 287 ATF_TC_BODY(dup_max, tc) 288 { 289 struct rlimit res; 290 int *buf, fd, sta; 291 size_t i, n; 292 pid_t pid; 293 294 pid = fork(); 295 ATF_REQUIRE(pid >= 0); 296 297 if (pid == 0) { 298 299 /* 300 * Open a temporary file until the 301 * maximum number of open files is 302 * reached. Ater that dup(2) family 303 * should fail with EMFILE. 304 */ 305 /* Adjusted for OpenBSD, initially 0 */ 306 (void)closefrom(STDERR_FILENO + 1); 307 (void)memset(&res, 0, sizeof(struct rlimit)); 308 309 n = 10; 310 res.rlim_cur = res.rlim_max = n; 311 if (setrlimit(RLIMIT_NOFILE, &res) != 0) 312 _exit(EX_OSERR); 313 314 buf = calloc(n, sizeof(int)); 315 316 if (buf == NULL) 317 _exit(EX_OSERR); 318 319 /* Adjusted for OpenBSD, initially mkstemp(path) */ 320 buf[0] = open(path, O_CREAT|O_EXCL|O_RDWR, S_IRUSR|S_IWUSR); 321 322 if (buf[0] < 0) 323 _exit(EX_OSERR); 324 325 /* Adjusted for OpenBSD, initially i < n */ 326 for (i = 1; i < n - (STDERR_FILENO + 1); i++) { 327 328 buf[i] = open(path, O_RDONLY); 329 330 if (buf[i] < 0) 331 _exit(EX_OSERR); 332 } 333 334 errno = 0; 335 fd = dup(buf[0]); 336 337 if (fd != -1 || errno != EMFILE) 338 _exit(EX_DATAERR); 339 340 _exit(EXIT_SUCCESS); 341 } 342 343 (void)wait(&sta); 344 345 if (WIFEXITED(sta) == 0 || WEXITSTATUS(sta) != EXIT_SUCCESS) { 346 347 if (WEXITSTATUS(sta) == EX_OSERR) 348 atf_tc_fail("system call error"); 349 350 if (WEXITSTATUS(sta) == EX_DATAERR) 351 atf_tc_fail("dup(2) dupped more than RLIMIT_NOFILE"); 352 353 atf_tc_fail("unknown error"); 354 } 355 356 (void)unlink(path); 357 } 358 359 ATF_TC_CLEANUP(dup_max, tc) 360 { 361 (void)unlink(path); 362 } 363 364 ATF_TC_WITH_CLEANUP(dup_mode); 365 ATF_TC_HEAD(dup_mode, tc) 366 { 367 atf_tc_set_md_var(tc, "descr", "A basic test of dup(2)"); 368 } 369 370 ATF_TC_BODY(dup_mode, tc) 371 { 372 check_mode(true, false, false); 373 } 374 375 ATF_TC_CLEANUP(dup_mode, tc) 376 { 377 (void)unlink(path); 378 } 379 380 ATF_TP_ADD_TCS(tp) 381 { 382 383 ATF_TP_ADD_TC(tp, dup2_basic); 384 ATF_TP_ADD_TC(tp, dup2_err); 385 ATF_TP_ADD_TC(tp, dup2_max); 386 ATF_TP_ADD_TC(tp, dup2_mode); 387 ATF_TP_ADD_TC(tp, dup3_err); 388 ATF_TP_ADD_TC(tp, dup3_max); 389 ATF_TP_ADD_TC(tp, dup3_mode); 390 ATF_TP_ADD_TC(tp, dup_err); 391 ATF_TP_ADD_TC(tp, dup_max); 392 ATF_TP_ADD_TC(tp, dup_mode); 393 394 return atf_no_error(); 395 } 396