1 /*- 2 * Copyright (c) 2009-2011 Robert N. M. Watson 3 * Copyright (c) 2011 Jonathan Anderson 4 * Copyright (c) 2012 FreeBSD Foundation 5 * All rights reserved. 6 * 7 * Portions of this software were developed by Pawel Jakub Dawidek under 8 * sponsorship from the FreeBSD Foundation. 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 AUTHOR AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 /* 33 * Test whether various operations on capabilities are properly masked for 34 * various object types. 35 */ 36 37 #include <sys/param.h> 38 #include <sys/capsicum.h> 39 #include <sys/errno.h> 40 #include <sys/mman.h> 41 #include <sys/mount.h> 42 #include <sys/stat.h> 43 44 #include <err.h> 45 #include <fcntl.h> 46 #include <poll.h> 47 #include <stdint.h> 48 #include <stdio.h> 49 #include <stdlib.h> 50 #include <string.h> 51 #include <unistd.h> 52 53 #include "cap_test.h" 54 55 #define SYSCALL_FAIL(syscall, message) \ 56 FAIL("%s:\t%s (rights 0x%jx)", #syscall, message, rights) 57 58 /* 59 * Ensure that, if the capability had enough rights for the system call to 60 * pass, then it did. Otherwise, ensure that the errno is ENOTCAPABLE; 61 * capability restrictions should kick in before any other error logic. 62 */ 63 #define CHECK_RESULT(syscall, rights_needed, succeeded) do { \ 64 if ((rights & (rights_needed)) == (rights_needed)) { \ 65 if (succeeded) { \ 66 if (success == -1) \ 67 success = PASSED; \ 68 } else { \ 69 SYSCALL_FAIL(syscall, "failed"); \ 70 } \ 71 } else { \ 72 if (succeeded) { \ 73 FAILX("%s:\tsucceeded when it shouldn't have" \ 74 " (rights 0x%jx)", #syscall, \ 75 (uintmax_t)rights); \ 76 } else if (errno != ENOTCAPABLE) { \ 77 SYSCALL_FAIL(syscall, "errno != ENOTCAPABLE"); \ 78 } \ 79 } \ 80 errno = 0; \ 81 } while (0) 82 83 /* 84 * As above, but for the special mmap() case: unmap after successful mmap(). 85 */ 86 #define CHECK_MMAP_RESULT(rights_needed) do { \ 87 if ((rights & (rights_needed)) == (rights_needed)) { \ 88 if (p == MAP_FAILED) \ 89 SYSCALL_FAIL(mmap, "failed"); \ 90 else { \ 91 (void)munmap(p, getpagesize()); \ 92 if (success == -1) \ 93 success = PASSED; \ 94 } \ 95 } else { \ 96 if (p != MAP_FAILED) { \ 97 FAILX("%s:\tsucceeded when it shouldn't have" \ 98 " (rights 0x%jx)", "mmap", rights); \ 99 (void)munmap(p, getpagesize()); \ 100 } else if (errno != ENOTCAPABLE) \ 101 SYSCALL_FAIL(syscall, "errno != ENOTCAPABLE"); \ 102 } \ 103 errno = 0; \ 104 } while (0) 105 106 /* 107 * Given a file descriptor, create a capability with specific rights and 108 * make sure only those rights work. 109 */ 110 static int 111 try_file_ops(int filefd, int dirfd, cap_rights_t rights) 112 { 113 struct stat sb; 114 struct statfs sf; 115 cap_rights_t erights; 116 int fd_cap, fd_capcap, dfd_cap; 117 ssize_t ssize, ssize2; 118 off_t off; 119 void *p; 120 char ch; 121 int ret, is_nfs; 122 struct pollfd pollfd; 123 int success = -1; 124 125 REQUIRE(fstatfs(filefd, &sf)); 126 is_nfs = (strcmp("nfs", sf.f_fstypename) == 0); 127 128 REQUIRE(fd_cap = cap_new(filefd, rights)); 129 CHECK(cap_getrights(fd_cap, &erights) == 0); 130 CHECK(rights == erights); 131 REQUIRE(fd_capcap = cap_new(fd_cap, rights)); 132 CHECK(cap_getrights(fd_capcap, &erights) == 0); 133 CHECK(rights == erights); 134 CHECK(fd_capcap != fd_cap); 135 REQUIRE(dfd_cap = cap_new(dirfd, rights)); 136 CHECK(cap_getrights(dfd_cap, &erights) == 0); 137 CHECK(rights == erights); 138 139 ssize = read(fd_cap, &ch, sizeof(ch)); 140 CHECK_RESULT(read, CAP_READ, ssize >= 0); 141 142 ssize = write(fd_cap, &ch, sizeof(ch)); 143 CHECK_RESULT(write, CAP_WRITE, ssize >= 0); 144 145 off = lseek(fd_cap, 0, SEEK_SET); 146 CHECK_RESULT(lseek, CAP_SEEK, off >= 0); 147 148 ssize = pread(fd_cap, &ch, sizeof(ch), 0); 149 ssize2 = pread(fd_cap, &ch, sizeof(ch), 0); 150 CHECK_RESULT(pread, CAP_PREAD, ssize >= 0); 151 CHECK(ssize == ssize2); 152 153 ssize = pwrite(fd_cap, &ch, sizeof(ch), 0); 154 CHECK_RESULT(pwrite, CAP_PWRITE, ssize >= 0); 155 156 p = mmap(NULL, getpagesize(), PROT_NONE, MAP_SHARED, fd_cap, 0); 157 CHECK_MMAP_RESULT(CAP_MMAP); 158 159 p = mmap(NULL, getpagesize(), PROT_READ, MAP_SHARED, fd_cap, 0); 160 CHECK_MMAP_RESULT(CAP_MMAP_R); 161 162 p = mmap(NULL, getpagesize(), PROT_WRITE, MAP_SHARED, fd_cap, 0); 163 CHECK_MMAP_RESULT(CAP_MMAP_W); 164 165 p = mmap(NULL, getpagesize(), PROT_EXEC, MAP_SHARED, fd_cap, 0); 166 CHECK_MMAP_RESULT(CAP_MMAP_X); 167 168 p = mmap(NULL, getpagesize(), PROT_READ | PROT_WRITE, MAP_SHARED, 169 fd_cap, 0); 170 CHECK_MMAP_RESULT(CAP_MMAP_RW); 171 172 p = mmap(NULL, getpagesize(), PROT_READ | PROT_EXEC, MAP_SHARED, 173 fd_cap, 0); 174 CHECK_MMAP_RESULT(CAP_MMAP_RX); 175 176 p = mmap(NULL, getpagesize(), PROT_EXEC | PROT_WRITE, MAP_SHARED, 177 fd_cap, 0); 178 CHECK_MMAP_RESULT(CAP_MMAP_WX); 179 180 p = mmap(NULL, getpagesize(), PROT_READ | PROT_WRITE | PROT_EXEC, 181 MAP_SHARED, fd_cap, 0); 182 CHECK_MMAP_RESULT(CAP_MMAP_RWX); 183 184 ret = openat(dfd_cap, "cap_create", O_CREAT | O_RDONLY, 0600); 185 CHECK_RESULT(openat(O_CREATE | O_RDONLY), 186 CAP_CREATE | CAP_READ | CAP_LOOKUP, ret >= 0); 187 CHECK(ret == -1 || close(ret) == 0); 188 CHECK(ret == -1 || unlinkat(dirfd, "cap_create", 0) == 0); 189 ret = openat(dfd_cap, "cap_create", O_CREAT | O_WRONLY | O_APPEND, 190 0600); 191 CHECK_RESULT(openat(O_CREATE | O_WRONLY | O_APPEND), 192 CAP_CREATE | CAP_WRITE | CAP_LOOKUP, ret >= 0); 193 CHECK(ret == -1 || close(ret) == 0); 194 CHECK(ret == -1 || unlinkat(dirfd, "cap_create", 0) == 0); 195 ret = openat(dfd_cap, "cap_create", O_CREAT | O_RDWR | O_APPEND, 0600); 196 CHECK_RESULT(openat(O_CREATE | O_RDWR | O_APPEND), 197 CAP_CREATE | CAP_READ | CAP_WRITE | CAP_LOOKUP, ret >= 0); 198 CHECK(ret == -1 || close(ret) == 0); 199 CHECK(ret == -1 || unlinkat(dirfd, "cap_create", 0) == 0); 200 201 ret = fsync(fd_cap); 202 CHECK_RESULT(fsync, CAP_FSYNC, ret == 0); 203 204 ret = openat(dirfd, "cap_fsync", O_CREAT, 0600); 205 CHECK(ret >= 0); 206 CHECK(close(ret) == 0); 207 ret = openat(dfd_cap, "cap_fsync", O_FSYNC | O_RDONLY); 208 CHECK_RESULT(openat(O_FSYNC | O_RDONLY), 209 CAP_FSYNC | CAP_READ | CAP_LOOKUP, ret >= 0); 210 CHECK(ret == -1 || close(ret) == 0); 211 ret = openat(dfd_cap, "cap_fsync", O_FSYNC | O_WRONLY | O_APPEND); 212 CHECK_RESULT(openat(O_FSYNC | O_WRONLY | O_APPEND), 213 CAP_FSYNC | CAP_WRITE | CAP_LOOKUP, ret >= 0); 214 CHECK(ret == -1 || close(ret) == 0); 215 ret = openat(dfd_cap, "cap_fsync", O_FSYNC | O_RDWR | O_APPEND); 216 CHECK_RESULT(openat(O_FSYNC | O_RDWR | O_APPEND), 217 CAP_FSYNC | CAP_READ | CAP_WRITE | CAP_LOOKUP, ret >= 0); 218 CHECK(ret == -1 || close(ret) == 0); 219 ret = openat(dfd_cap, "cap_fsync", O_SYNC | O_RDONLY); 220 CHECK_RESULT(openat(O_SYNC | O_RDONLY), 221 CAP_FSYNC | CAP_READ | CAP_LOOKUP, ret >= 0); 222 CHECK(ret == -1 || close(ret) == 0); 223 ret = openat(dfd_cap, "cap_fsync", O_SYNC | O_WRONLY | O_APPEND); 224 CHECK_RESULT(openat(O_SYNC | O_WRONLY | O_APPEND), 225 CAP_FSYNC | CAP_WRITE | CAP_LOOKUP, ret >= 0); 226 CHECK(ret == -1 || close(ret) == 0); 227 ret = openat(dfd_cap, "cap_fsync", O_SYNC | O_RDWR | O_APPEND); 228 CHECK_RESULT(openat(O_SYNC | O_RDWR | O_APPEND), 229 CAP_FSYNC | CAP_READ | CAP_WRITE | CAP_LOOKUP, ret >= 0); 230 CHECK(ret == -1 || close(ret) == 0); 231 CHECK(unlinkat(dirfd, "cap_fsync", 0) == 0); 232 233 ret = ftruncate(fd_cap, 0); 234 CHECK_RESULT(ftruncate, CAP_FTRUNCATE, ret == 0); 235 236 ret = openat(dirfd, "cap_ftruncate", O_CREAT, 0600); 237 CHECK(ret >= 0); 238 CHECK(close(ret) == 0); 239 ret = openat(dfd_cap, "cap_ftruncate", O_TRUNC | O_RDONLY); 240 CHECK_RESULT(openat(O_TRUNC | O_RDONLY), 241 CAP_FTRUNCATE | CAP_READ | CAP_LOOKUP, ret >= 0); 242 CHECK(ret == -1 || close(ret) == 0); 243 ret = openat(dfd_cap, "cap_ftruncate", O_TRUNC | O_WRONLY); 244 CHECK_RESULT(openat(O_TRUNC | O_WRONLY), 245 CAP_FTRUNCATE | CAP_WRITE | CAP_LOOKUP, ret >= 0); 246 CHECK(ret == -1 || close(ret) == 0); 247 ret = openat(dfd_cap, "cap_ftruncate", O_TRUNC | O_RDWR); 248 CHECK_RESULT(openat(O_TRUNC | O_RDWR), 249 CAP_FTRUNCATE | CAP_READ | CAP_WRITE | CAP_LOOKUP, ret >= 0); 250 CHECK(ret == -1 || close(ret) == 0); 251 CHECK(unlinkat(dirfd, "cap_ftruncate", 0) == 0); 252 253 ret = openat(dfd_cap, "cap_create", O_CREAT | O_WRONLY, 0600); 254 CHECK_RESULT(openat(O_CREATE | O_WRONLY), 255 CAP_CREATE | CAP_WRITE | CAP_SEEK | CAP_LOOKUP, ret >= 0); 256 CHECK(ret == -1 || close(ret) == 0); 257 CHECK(ret == -1 || unlinkat(dirfd, "cap_create", 0) == 0); 258 ret = openat(dfd_cap, "cap_create", O_CREAT | O_RDWR, 0600); 259 CHECK_RESULT(openat(O_CREATE | O_RDWR), 260 CAP_CREATE | CAP_READ | CAP_WRITE | CAP_SEEK | CAP_LOOKUP, 261 ret >= 0); 262 CHECK(ret == -1 || close(ret) == 0); 263 CHECK(ret == -1 || unlinkat(dirfd, "cap_create", 0) == 0); 264 265 ret = openat(dirfd, "cap_fsync", O_CREAT, 0600); 266 CHECK(ret >= 0); 267 CHECK(close(ret) == 0); 268 ret = openat(dfd_cap, "cap_fsync", O_FSYNC | O_WRONLY); 269 CHECK_RESULT(openat(O_FSYNC | O_WRONLY), 270 CAP_FSYNC | CAP_WRITE | CAP_SEEK | CAP_LOOKUP, ret >= 0); 271 CHECK(ret == -1 || close(ret) == 0); 272 ret = openat(dfd_cap, "cap_fsync", O_FSYNC | O_RDWR); 273 CHECK_RESULT(openat(O_FSYNC | O_RDWR), 274 CAP_FSYNC | CAP_READ | CAP_WRITE | CAP_SEEK | CAP_LOOKUP, ret >= 0); 275 CHECK(ret == -1 || close(ret) == 0); 276 ret = openat(dfd_cap, "cap_fsync", O_SYNC | O_WRONLY); 277 CHECK_RESULT(openat(O_SYNC | O_WRONLY), 278 CAP_FSYNC | CAP_WRITE | CAP_SEEK | CAP_LOOKUP, ret >= 0); 279 CHECK(ret == -1 || close(ret) == 0); 280 ret = openat(dfd_cap, "cap_fsync", O_SYNC | O_RDWR); 281 CHECK_RESULT(openat(O_SYNC | O_RDWR), 282 CAP_FSYNC | CAP_READ | CAP_WRITE | CAP_SEEK | CAP_LOOKUP, ret >= 0); 283 CHECK(ret == -1 || close(ret) == 0); 284 CHECK(unlinkat(dirfd, "cap_fsync", 0) == 0); 285 286 /* 287 * Note: this is not expected to work over NFS. 288 */ 289 ret = fchflags(fd_cap, UF_NODUMP); 290 CHECK_RESULT(fchflags, CAP_FCHFLAGS, 291 ret == 0 || (is_nfs && errno == EOPNOTSUPP)); 292 293 ret = openat(dirfd, "cap_chflagsat", O_CREAT, 0600); 294 CHECK(ret >= 0); 295 CHECK(close(ret) == 0); 296 ret = chflagsat(dfd_cap, "cap_chflagsat", UF_NODUMP, 0); 297 CHECK_RESULT(chflagsat, CAP_CHFLAGSAT | CAP_LOOKUP, ret == 0); 298 CHECK(unlinkat(dirfd, "cap_chflagsat", 0) == 0); 299 300 ret = fchown(fd_cap, -1, -1); 301 CHECK_RESULT(fchown, CAP_FCHOWN, ret == 0); 302 303 ret = openat(dirfd, "cap_fchownat", O_CREAT, 0600); 304 CHECK(ret >= 0); 305 CHECK(close(ret) == 0); 306 ret = fchownat(dfd_cap, "cap_fchownat", -1, -1, 0); 307 CHECK_RESULT(fchownat, CAP_FCHOWN | CAP_LOOKUP, ret == 0); 308 CHECK(unlinkat(dirfd, "cap_fchownat", 0) == 0); 309 310 ret = fchmod(fd_cap, 0644); 311 CHECK_RESULT(fchmod, CAP_FCHMOD, ret == 0); 312 313 ret = openat(dirfd, "cap_fchmodat", O_CREAT, 0600); 314 CHECK(ret >= 0); 315 CHECK(close(ret) == 0); 316 ret = fchmodat(dfd_cap, "cap_fchmodat", 0600, 0); 317 CHECK_RESULT(fchmodat, CAP_FCHMOD | CAP_LOOKUP, ret == 0); 318 CHECK(unlinkat(dirfd, "cap_fchmodat", 0) == 0); 319 320 ret = fcntl(fd_cap, F_GETFL); 321 CHECK_RESULT(fcntl(F_GETFL), CAP_FCNTL, ret >= 0); 322 ret = fcntl(fd_cap, F_SETFL, ret); 323 CHECK_RESULT(fcntl(F_SETFL), CAP_FCNTL, ret == 0); 324 325 /* XXX flock */ 326 327 ret = fstat(fd_cap, &sb); 328 CHECK_RESULT(fstat, CAP_FSTAT, ret == 0); 329 330 ret = openat(dirfd, "cap_fstatat", O_CREAT, 0600); 331 CHECK(ret >= 0); 332 CHECK(close(ret) == 0); 333 ret = fstatat(dfd_cap, "cap_fstatat", &sb, 0); 334 CHECK_RESULT(fstatat, CAP_FSTAT | CAP_LOOKUP, ret == 0); 335 CHECK(unlinkat(dirfd, "cap_fstatat", 0) == 0); 336 337 ret = fstatfs(fd_cap, &sf); 338 CHECK_RESULT(fstatfs, CAP_FSTATFS, ret == 0); 339 340 ret = fpathconf(fd_cap, _PC_NAME_MAX); 341 CHECK_RESULT(fpathconf, CAP_FPATHCONF, ret >= 0); 342 343 ret = futimes(fd_cap, NULL); 344 CHECK_RESULT(futimes, CAP_FUTIMES, ret == 0); 345 346 ret = openat(dirfd, "cap_futimesat", O_CREAT, 0600); 347 CHECK(ret >= 0); 348 CHECK(close(ret) == 0); 349 ret = futimesat(dfd_cap, "cap_futimesat", NULL); 350 CHECK_RESULT(futimesat, CAP_FUTIMES | CAP_LOOKUP, ret == 0); 351 CHECK(unlinkat(dirfd, "cap_futimesat", 0) == 0); 352 353 ret = openat(dirfd, "cap_linkat_src", O_CREAT, 0600); 354 CHECK(ret >= 0); 355 CHECK(close(ret) == 0); 356 ret = linkat(dirfd, "cap_linkat_src", dfd_cap, "cap_linkat_dst", 0); 357 CHECK_RESULT(linkat, CAP_LINKAT | CAP_LOOKUP, ret == 0); 358 CHECK(unlinkat(dirfd, "cap_linkat_src", 0) == 0); 359 CHECK(ret == -1 || unlinkat(dirfd, "cap_linkat_dst", 0) == 0); 360 361 ret = mkdirat(dfd_cap, "cap_mkdirat", 0700); 362 CHECK_RESULT(mkdirat, CAP_MKDIRAT | CAP_LOOKUP, ret == 0); 363 CHECK(ret == -1 || unlinkat(dirfd, "cap_mkdirat", AT_REMOVEDIR) == 0); 364 365 ret = mkfifoat(dfd_cap, "cap_mkfifoat", 0600); 366 CHECK_RESULT(mkfifoat, CAP_MKFIFOAT | CAP_LOOKUP, ret == 0); 367 CHECK(ret == -1 || unlinkat(dirfd, "cap_mkfifoat", 0) == 0); 368 369 ret = mknodat(dfd_cap, "cap_mknodat", S_IFCHR | 0600, 0); 370 CHECK_RESULT(mknodat, CAP_MKNODAT | CAP_LOOKUP, ret == 0); 371 CHECK(ret == -1 || unlinkat(dirfd, "cap_mknodat", 0) == 0); 372 373 /* TODO: renameat(2) */ 374 375 ret = symlinkat("test", dfd_cap, "cap_symlinkat"); 376 CHECK_RESULT(symlinkat, CAP_SYMLINKAT | CAP_LOOKUP, ret == 0); 377 CHECK(ret == -1 || unlinkat(dirfd, "cap_symlinkat", 0) == 0); 378 379 ret = openat(dirfd, "cap_unlinkat", O_CREAT, 0600); 380 CHECK(ret >= 0); 381 CHECK(close(ret) == 0); 382 ret = unlinkat(dfd_cap, "cap_unlinkat", 0); 383 CHECK_RESULT(unlinkat, CAP_UNLINKAT | CAP_LOOKUP, ret == 0); 384 CHECK(ret == 0 || unlinkat(dirfd, "cap_unlinkat", 0) == 0); 385 ret = mkdirat(dirfd, "cap_unlinkat", 0700); 386 CHECK(ret == 0); 387 ret = unlinkat(dfd_cap, "cap_unlinkat", AT_REMOVEDIR); 388 CHECK_RESULT(unlinkat, CAP_UNLINKAT | CAP_LOOKUP, ret == 0); 389 CHECK(ret == 0 || unlinkat(dirfd, "cap_unlinkat", AT_REMOVEDIR) == 0); 390 391 pollfd.fd = fd_cap; 392 pollfd.events = POLLIN | POLLERR | POLLHUP; 393 pollfd.revents = 0; 394 395 ret = poll(&pollfd, 1, 0); 396 if (rights & CAP_EVENT) 397 CHECK((pollfd.revents & POLLNVAL) == 0); 398 else 399 CHECK((pollfd.revents & POLLNVAL) != 0); 400 401 /* XXX: select, kqueue */ 402 403 close(fd_cap); 404 close(fd_capcap); 405 406 if (success == -1) { 407 fprintf(stderr, "No tests for rights 0x%jx.\n", 408 (uintmax_t)rights); 409 success = FAILED; 410 } 411 return (success); 412 } 413 414 #define TRY(rights) \ 415 do { \ 416 if (success == PASSED) \ 417 success = try_file_ops(filefd, dirfd, (rights)); \ 418 else \ 419 /* We've already failed, but try the test anyway. */ \ 420 try_file_ops(filefd, dirfd, (rights)); \ 421 } while (0) 422 423 #define KEEP_ERRNO(...) do { \ 424 int _saved_errno = errno; \ 425 __VA_ARGS__; \ 426 errno = _saved_errno; \ 427 } while (0); 428 429 int 430 test_capabilities(void) 431 { 432 int filefd, dirfd, tmpfd; 433 int success = PASSED; 434 char file[] = "/tmp/cap_test.XXXXXXXXXX"; 435 char dir[] = "/tmp/cap_test.XXXXXXXXXX"; 436 437 filefd = mkstemp(file); 438 if (filefd < 0) 439 err(-1, "mkstemp"); 440 if (mkdtemp(dir) == NULL) { 441 KEEP_ERRNO(unlink(file)); 442 err(-1, "mkdtemp"); 443 } 444 dirfd = open(dir, O_RDONLY | O_DIRECTORY); 445 if (dirfd == -1) { 446 KEEP_ERRNO(unlink(file)); 447 KEEP_ERRNO(rmdir(dir)); 448 err(-1, "open"); 449 } 450 tmpfd = open("/tmp", O_RDONLY | O_DIRECTORY); 451 if (tmpfd == -1) { 452 KEEP_ERRNO(unlink(file)); 453 KEEP_ERRNO(rmdir(dir)); 454 err(-1, "open"); 455 } 456 457 if (cap_enter() == -1) { 458 KEEP_ERRNO(unlink(file)); 459 KEEP_ERRNO(rmdir(dir)); 460 err(-1, "cap_enter"); 461 } 462 463 TRY(CAP_READ); 464 TRY(CAP_WRITE); 465 TRY(CAP_SEEK); 466 TRY(CAP_PREAD); 467 TRY(CAP_PWRITE); 468 TRY(CAP_READ | CAP_WRITE); 469 TRY(CAP_PREAD | CAP_PWRITE); 470 TRY(CAP_MMAP); 471 TRY(CAP_MMAP_R); 472 TRY(CAP_MMAP_W); 473 TRY(CAP_MMAP_X); 474 TRY(CAP_MMAP_RW); 475 TRY(CAP_MMAP_RX); 476 TRY(CAP_MMAP_WX); 477 TRY(CAP_MMAP_RWX); 478 TRY(CAP_CREATE | CAP_READ | CAP_LOOKUP); 479 TRY(CAP_CREATE | CAP_WRITE | CAP_LOOKUP); 480 TRY(CAP_CREATE | CAP_READ | CAP_WRITE | CAP_LOOKUP); 481 #ifdef TODO 482 TRY(CAP_FEXECVE); 483 #endif 484 TRY(CAP_FSYNC); 485 TRY(CAP_FSYNC | CAP_READ | CAP_LOOKUP); 486 TRY(CAP_FSYNC | CAP_WRITE | CAP_LOOKUP); 487 TRY(CAP_FSYNC | CAP_READ | CAP_WRITE | CAP_LOOKUP); 488 TRY(CAP_FTRUNCATE); 489 TRY(CAP_FTRUNCATE | CAP_READ | CAP_LOOKUP); 490 TRY(CAP_FTRUNCATE | CAP_WRITE | CAP_LOOKUP); 491 TRY(CAP_FTRUNCATE | CAP_READ | CAP_WRITE | CAP_LOOKUP); 492 #ifdef TODO 493 TRY(CAP_FCHDIR); 494 #endif 495 TRY(CAP_FCHFLAGS); 496 TRY(CAP_FCHOWN); 497 TRY(CAP_FCHOWN | CAP_LOOKUP); 498 TRY(CAP_FCHMOD | CAP_LOOKUP); 499 TRY(CAP_FCNTL); 500 #ifdef TODO 501 TRY(CAP_FLOCK); 502 #endif 503 TRY(CAP_FPATHCONF); 504 #ifdef TODO 505 TRY(CAP_FSCK); 506 #endif 507 TRY(CAP_FSTAT | CAP_LOOKUP); 508 TRY(CAP_FSTATFS); 509 TRY(CAP_FUTIMES | CAP_LOOKUP); 510 TRY(CAP_LINKAT | CAP_LOOKUP); 511 TRY(CAP_MKDIRAT | CAP_LOOKUP); 512 TRY(CAP_MKFIFOAT | CAP_LOOKUP); 513 TRY(CAP_MKNODAT | CAP_LOOKUP); 514 TRY(CAP_SYMLINKAT | CAP_LOOKUP); 515 TRY(CAP_UNLINKAT | CAP_LOOKUP); 516 /* Rename needs CAP_RENAMEAT on source directory and CAP_LINKAT on destination directory. */ 517 TRY(CAP_RENAMEAT | CAP_UNLINKAT | CAP_LOOKUP); 518 #ifdef TODO 519 TRY(CAP_LOOKUP); 520 TRY(CAP_EXTATTR_DELETE); 521 TRY(CAP_EXTATTR_GET); 522 TRY(CAP_EXTATTR_LIST); 523 TRY(CAP_EXTATTR_SET); 524 TRY(CAP_ACL_CHECK); 525 TRY(CAP_ACL_DELETE); 526 TRY(CAP_ACL_GET); 527 TRY(CAP_ACL_SET); 528 TRY(CAP_ACCEPT); 529 TRY(CAP_BIND); 530 TRY(CAP_CONNECT); 531 TRY(CAP_GETPEERNAME); 532 TRY(CAP_GETSOCKNAME); 533 TRY(CAP_GETSOCKOPT); 534 TRY(CAP_LISTEN); 535 TRY(CAP_PEELOFF); 536 TRY(CAP_RECV); 537 TRY(CAP_SEND); 538 TRY(CAP_SETSOCKOPT); 539 TRY(CAP_SHUTDOWN); 540 TRY(CAP_MAC_GET); 541 TRY(CAP_MAC_SET); 542 TRY(CAP_SEM_GETVALUE); 543 TRY(CAP_SEM_POST); 544 TRY(CAP_SEM_WAIT); 545 TRY(CAP_POST_EVENT); 546 TRY(CAP_EVENT); 547 TRY(CAP_IOCTL); 548 TRY(CAP_TTYHOOK); 549 TRY(CAP_PDGETPID); 550 TRY(CAP_PDWAIT); 551 TRY(CAP_PDKILL); 552 #endif 553 554 (void)unlinkat(tmpfd, file + strlen("/tmp/"), 0); 555 (void)unlinkat(tmpfd, dir + strlen("/tmp/"), AT_REMOVEDIR); 556 557 return (success); 558 } 559