| 1 | /*++ |
| 2 | |
| 3 | Copyright (c) Microsoft. All rights reserved. |
| 4 | |
| 5 | Module Name: |
| 6 | |
| 7 | auxv.c |
| 8 | |
| 9 | Abstract: |
| 10 | |
| 11 | This file is a test for the auxiliary vector functionality. |
| 12 | |
| 13 | --*/ |
| 14 | |
| 15 | #include <stdio.h> |
| 16 | #include <stdlib.h> |
| 17 | #include <sys/auxv.h> |
| 18 | #include <sys/types.h> |
| 19 | #include <sys/stat.h> |
| 20 | #include <fcntl.h> |
| 21 | #include <unistd.h> |
| 22 | #include "lxtcommon.h" |
| 23 | #include "unittests.h" |
| 24 | |
| 25 | #define AUXV_UID 1004 |
| 26 | #define AUXV_GID 1004 |
| 27 | |
| 28 | #define LXT_NAME "auxv" |
| 29 | |
| 30 | #define AUXV_TEST_SCRIPT "auxv_test_script.sh" |
| 31 | #define AUXV_TEST_SCRIPT_SOURCE "#!" AUXV_TEST_PROGRAM_PATH |
| 32 | #define AUXV_TEST_PROGRAM "auxv_test_program" |
| 33 | #define AUXV_TEST_PROGRAM_PATH "/data/test/" AUXV_TEST_PROGRAM |
| 34 | #define AUXV_TEST_PROGRAM_SOURCE_FILE "auxv_test_program.c" |
| 35 | #define AUXV_TEST_PROGRAM_SOURCE \ |
| 36 | "#include <stdio.h>\n" \ |
| 37 | "#include <string.h>\n" \ |
| 38 | "#include <stdlib.h>\n" \ |
| 39 | "#include <sys/auxv.h>\n" \ |
| 40 | "\n" \ |
| 41 | "int main(int Argc, char** Argv)\n" \ |
| 42 | "{\n" \ |
| 43 | " int Index;\n" \ |
| 44 | " char* Filename = (char*)getauxval(AT_EXECFN);\n" \ |
| 45 | " char* Platform = (char*)getauxval(AT_PLATFORM);\n" \ |
| 46 | " printf(\"AT_EXECFN: %%s {%%p}\\n\", Filename, Filename);\n" \ |
| 47 | " printf(\"AT_PLATFORM: %%s {%%p}\\n\", Platform, Platform);\n" \ |
| 48 | " for (Index = 0; Index < Argc; Index += 1) {\n" \ |
| 49 | " printf(\"Argv[%%d] = %%s\\n\", Index, Argv[Index]);\n" \ |
| 50 | " }\n" \ |
| 51 | " if (Platform > Filename) {\n" \ |
| 52 | " return -1;\n" \ |
| 53 | " }\n" \ |
| 54 | " if ((strcmp(Platform, \"%s\") != 0) ||\n" \ |
| 55 | " (strcmp(Filename, \"%s\") != 0)) {\n" \ |
| 56 | " return -1;\n" \ |
| 57 | " }\n" \ |
| 58 | " return 0;\n" \ |
| 59 | "}" |
| 60 | |
| 61 | int AuxvAtExecfn(PLXT_ARGS Args); |
| 62 | |
| 63 | int AuxvGetAuxv(PLXT_ARGS Args); |
| 64 | |
| 65 | int AuxvGetAuxvChild(void); |
| 66 | |
| 67 | static const LXT_VARIATION g_LxtVariations[] = {{"getauxv", AuxvGetAuxv}, {"AT_EXECFN", AuxvAtExecfn}}; |
| 68 | |
| 69 | int AuxvTestEntry(int Argc, char* Argv[]) |
| 70 | { |
| 71 | |
| 72 | LXT_ARGS Args; |
| 73 | int ArgvIndex; |
| 74 | int Result; |
| 75 | |
| 76 | Result = LXT_RESULT_FAILURE; |
| 77 | |
| 78 | // |
| 79 | // Parse the arguments. |
| 80 | // |
| 81 | |
| 82 | for (ArgvIndex = 1; ArgvIndex < Argc; ++ArgvIndex) |
| 83 | { |
| 84 | if (Argv[ArgvIndex][0] != '-') |
| 85 | { |
| 86 | printf("Unexpected character %s", Argv[ArgvIndex]); |
| 87 | goto ErrorExit; |
| 88 | } |
| 89 | |
| 90 | switch (Argv[ArgvIndex][1]) |
| 91 | { |
| 92 | case 'c': |
| 93 | |
| 94 | // |
| 95 | // Run the getauxv child variation. |
| 96 | // |
| 97 | |
| 98 | return AuxvGetAuxvChild(); |
| 99 | |
| 100 | // |
| 101 | // The below arguments are taken care of by LxtInitialize. |
| 102 | // |
| 103 | |
| 104 | case 'a': |
| 105 | break; |
| 106 | |
| 107 | case 'v': |
| 108 | case 'l': |
| 109 | ++ArgvIndex; |
| 110 | |
| 111 | break; |
| 112 | |
| 113 | default: |
| 114 | goto ErrorExit; |
| 115 | } |
| 116 | } |
| 117 | |
| 118 | // |
| 119 | // If -c was not specified, just run the tests |
| 120 | // |
| 121 | |
| 122 | LxtCheckResult(LxtInitialize(Argc, Argv, &Args, LXT_NAME)); |
| 123 | LxtCheckResult(LxtRunVariations(&Args, g_LxtVariations, LXT_COUNT_OF(g_LxtVariations))); |
| 124 | |
| 125 | ErrorExit: |
| 126 | LxtUninitialize(); |
| 127 | return 0; |
| 128 | } |
| 129 | |
| 130 | int AuxvGetAuxv(PLXT_ARGS Args) |
| 131 | |
| 132 | { |
| 133 | |
| 134 | char* Argv[4]; |
| 135 | struct stat Buffer; |
| 136 | int ChildPid; |
| 137 | int Mode; |
| 138 | int OriginalMode; |
| 139 | gid_t OriginalGid; |
| 140 | uid_t OriginalUid; |
| 141 | int Result; |
| 142 | unsigned long Value; |
| 143 | |
| 144 | ChildPid = -1; |
| 145 | OriginalMode = 0; |
| 146 | OriginalUid = 0; |
| 147 | OriginalGid = 0; |
| 148 | Value = getauxval(AT_SECURE); |
| 149 | LxtLogInfo("Parent AT_SECURE = %u", Value); |
| 150 | LxtCheckEqual(Value, 0, "%u"); |
| 151 | |
| 152 | // change Args->Argv[0] so that it points to the new single test binary design |
| 153 | Args->Argv[0] = Argv[0] = WSL_UNIT_TEST_BINARY; |
| 154 | LxtLogInfo("calling stat(%s)", Args->Argv[0]); |
| 155 | LxtCheckErrno(stat(Args->Argv[0], &Buffer)); |
| 156 | OriginalMode = Buffer.st_mode; |
| 157 | OriginalGid = Buffer.st_gid; |
| 158 | OriginalUid = Buffer.st_uid; |
| 159 | |
| 160 | LxtLogInfo("Setting the set-user-ID bit"); |
| 161 | Mode = OriginalMode | S_ISUID; |
| 162 | |
| 163 | LxtCheckErrno(chown(Args->Argv[0], AUXV_UID, AUXV_UID)); |
| 164 | LxtCheckErrno(chmod(Args->Argv[0], Mode)); |
| 165 | |
| 166 | // |
| 167 | // Start a child process to verify the value of AT_SECURE. |
| 168 | // |
| 169 | |
| 170 | LxtCheckErrno(ChildPid = fork()); |
| 171 | if (ChildPid == 0) |
| 172 | { |
| 173 | Argv[1] = "auxv"; |
| 174 | Argv[2] = "-c"; |
| 175 | Argv[3] = NULL; |
| 176 | execve(Args->Argv[0], Argv, NULL); |
| 177 | LxtLogError("Execve failed, errno: %d (%s)", errno, strerror(errno)); |
| 178 | _exit(LXT_RESULT_FAILURE); |
| 179 | } |
| 180 | |
| 181 | // |
| 182 | // Wait for the child to exit. |
| 183 | // |
| 184 | |
| 185 | LxtCheckResult(LxtWaitPidPoll(ChildPid, LXT_RESULT_SUCCESS)); |
| 186 | |
| 187 | LxtLogInfo("Setting the set-group-ID bit"); |
| 188 | Mode = OriginalMode | S_ISGID; |
| 189 | LxtCheckErrno(chmod(Args->Argv[0], Mode)); |
| 190 | |
| 191 | // |
| 192 | // Start a child process to verify the value of AT_SECURE. |
| 193 | // |
| 194 | |
| 195 | LxtCheckErrno(ChildPid = fork()); |
| 196 | if (ChildPid == 0) |
| 197 | { |
| 198 | Argv[1] = "auxv"; |
| 199 | Argv[2] = "-c"; |
| 200 | Argv[3] = NULL; |
| 201 | execve(Argv[0], Argv, NULL); |
| 202 | LxtLogError("Execve failed, errno: %d (%s)", errno, strerror(errno)); |
| 203 | _exit(LXT_RESULT_FAILURE); |
| 204 | } |
| 205 | |
| 206 | // |
| 207 | // Wait for the child to exit. |
| 208 | // |
| 209 | |
| 210 | LxtCheckResult(LxtWaitPidPoll(ChildPid, LXT_RESULT_SUCCESS)); |
| 211 | Result = LXT_RESULT_SUCCESS; |
| 212 | |
| 213 | ErrorExit: |
| 214 | if (OriginalMode != 0) |
| 215 | { |
| 216 | chmod(Args->Argv[0], OriginalMode); |
| 217 | chown(Args->Argv[0], OriginalUid, OriginalGid); |
| 218 | } |
| 219 | |
| 220 | if (ChildPid == 0) |
| 221 | { |
| 222 | _exit(Result); |
| 223 | } |
| 224 | |
| 225 | return Result; |
| 226 | } |
| 227 | |
| 228 | int AuxvGetAuxvChild(void) |
| 229 | |
| 230 | { |
| 231 | |
| 232 | int ChildPid; |
| 233 | int Result; |
| 234 | unsigned long Value; |
| 235 | |
| 236 | ChildPid = -1; |
| 237 | Value = getauxval(AT_SECURE); |
| 238 | LxtLogInfo("child AT_SECURE = %u", Value); |
| 239 | LxtCheckEqual(Value, 1, "%u"); |
| 240 | |
| 241 | // |
| 242 | // Start a child process to verify the value of AT_SECURE. |
| 243 | // |
| 244 | |
| 245 | LxtCheckErrno(ChildPid = fork()); |
| 246 | if (ChildPid == 0) |
| 247 | { |
| 248 | Value = getauxval(AT_SECURE); |
| 249 | LxtLogInfo("child fork AT_SECURE = %u", Value); |
| 250 | LxtCheckEqual(Value, 1, "%u"); |
| 251 | Result = LXT_RESULT_SUCCESS; |
| 252 | goto ErrorExit; |
| 253 | } |
| 254 | |
| 255 | // |
| 256 | // Wait for the child to exit. |
| 257 | // |
| 258 | |
| 259 | LxtCheckResult(LxtWaitPidPoll(ChildPid, LXT_RESULT_SUCCESS)); |
| 260 | Result = LXT_RESULT_SUCCESS; |
| 261 | |
| 262 | ErrorExit: |
| 263 | if (ChildPid == 0) |
| 264 | { |
| 265 | _exit(Result); |
| 266 | } |
| 267 | |
| 268 | return Result; |
| 269 | } |
| 270 | |
| 271 | int AuxvAtExecfnCompile(char* Filename) |
| 272 | |
| 273 | { |
| 274 | |
| 275 | char* Argv[5]; |
| 276 | char Buffer[1024]; |
| 277 | int ByteCount; |
| 278 | int ChildPid; |
| 279 | int Fd; |
| 280 | char* Platform; |
| 281 | int Result; |
| 282 | |
| 283 | ChildPid = -1; |
| 284 | Fd = -1; |
| 285 | Platform = (char*)getauxval(AT_PLATFORM); |
| 286 | |
| 287 | ByteCount = snprintf(Buffer, sizeof(Buffer), AUXV_TEST_PROGRAM_SOURCE, Platform, Filename); |
| 288 | |
| 289 | if (ByteCount < 0) |
| 290 | { |
| 291 | Result = LXT_RESULT_FAILURE; |
| 292 | LxtLogError("Formatting test source failed %d", errno); |
| 293 | goto ErrorExit; |
| 294 | } |
| 295 | |
| 296 | // |
| 297 | // Create the source file to be compiled. |
| 298 | // |
| 299 | |
| 300 | LxtCheckErrno(Fd = creat(AUXV_TEST_PROGRAM_SOURCE_FILE, 0755)); |
| 301 | LxtCheckErrno(ByteCount = write(Fd, Buffer, ByteCount)); |
| 302 | |
| 303 | // |
| 304 | // Compile the binary |
| 305 | // |
| 306 | |
| 307 | LxtCheckErrno(ChildPid = fork()); |
| 308 | if (ChildPid == 0) |
| 309 | { |
| 310 | Filename = "/usr/bin/gcc"; |
| 311 | Argv[0] = "gcc"; |
| 312 | Argv[1] = AUXV_TEST_PROGRAM_SOURCE_FILE; |
| 313 | Argv[2] = "-o"; |
| 314 | Argv[3] = AUXV_TEST_PROGRAM_PATH; |
| 315 | Argv[4] = NULL; |
| 316 | LxtCheckErrno(execv(Filename, Argv)); |
| 317 | goto ErrorExit; |
| 318 | } |
| 319 | |
| 320 | // |
| 321 | // Wait for the child to exit. |
| 322 | // |
| 323 | |
| 324 | LxtCheckResult(LxtWaitPidPollOptions(ChildPid, LXT_RESULT_SUCCESS, 0, 30)); |
| 325 | |
| 326 | Result = LXT_RESULT_SUCCESS; |
| 327 | |
| 328 | ErrorExit: |
| 329 | if (Fd != -1) |
| 330 | { |
| 331 | LxtClose(Fd); |
| 332 | } |
| 333 | |
| 334 | if (ChildPid == 0) |
| 335 | { |
| 336 | _exit(Result); |
| 337 | } |
| 338 | |
| 339 | unlink(AUXV_TEST_PROGRAM_SOURCE_FILE); |
| 340 | return Result; |
| 341 | } |
| 342 | |
| 343 | int AuxvAtExecfn(PLXT_ARGS Args) |
| 344 | |
| 345 | { |
| 346 | |
| 347 | char* Argv[2]; |
| 348 | int ByteCount; |
| 349 | int ChildPid; |
| 350 | char* Environment[2]; |
| 351 | int Fd; |
| 352 | char* Filename; |
| 353 | int Result; |
| 354 | |
| 355 | ChildPid = -1; |
| 356 | Fd = -1; |
| 357 | Filename = AUXV_TEST_PROGRAM_PATH; |
| 358 | LxtCheckResult(AuxvAtExecfnCompile(Filename)); |
| 359 | |
| 360 | // |
| 361 | // Run the binary with a non-null argument array. |
| 362 | // |
| 363 | |
| 364 | LxtCheckErrno(ChildPid = fork()); |
| 365 | if (ChildPid == 0) |
| 366 | { |
| 367 | Argv[0] = AUXV_TEST_PROGRAM_PATH; |
| 368 | Argv[1] = NULL; |
| 369 | LxtCheckErrno(execv(Filename, Argv)); |
| 370 | goto ErrorExit; |
| 371 | } |
| 372 | |
| 373 | LxtCheckResult(LxtWaitPidPoll(ChildPid, LXT_RESULT_SUCCESS)); |
| 374 | |
| 375 | // |
| 376 | // Run the binary with a null argument array. |
| 377 | // |
| 378 | |
| 379 | LxtCheckErrno(ChildPid = fork()); |
| 380 | if (ChildPid == 0) |
| 381 | { |
| 382 | Environment[0] = "FOO=bar"; |
| 383 | Environment[1] = NULL; |
| 384 | LxtCheckErrno(LxtExecve(Filename, NULL, Environment)); |
| 385 | goto ErrorExit; |
| 386 | } |
| 387 | |
| 388 | // |
| 389 | // Wait for the child to exit. |
| 390 | // |
| 391 | |
| 392 | LxtCheckResult(LxtWaitPidPoll(ChildPid, LXT_RESULT_SUCCESS)); |
| 393 | |
| 394 | // |
| 395 | // Run the binary with an Argv[0] that does not match the filename. |
| 396 | // |
| 397 | |
| 398 | LxtCheckErrno(ChildPid = fork()); |
| 399 | if (ChildPid == 0) |
| 400 | { |
| 401 | Argv[0] = "FOO"; |
| 402 | Argv[1] = NULL; |
| 403 | LxtCheckErrno(execv(Filename, Argv)); |
| 404 | goto ErrorExit; |
| 405 | } |
| 406 | |
| 407 | // |
| 408 | // Wait for the child to exit. |
| 409 | // |
| 410 | |
| 411 | LxtCheckResult(LxtWaitPidPoll(ChildPid, LXT_RESULT_SUCCESS)); |
| 412 | |
| 413 | // |
| 414 | // Run the binary with an empty command line. |
| 415 | // |
| 416 | |
| 417 | LxtCheckErrno(ChildPid = fork()); |
| 418 | if (ChildPid == 0) |
| 419 | { |
| 420 | Environment[0] = "FOO=bar"; |
| 421 | Environment[1] = NULL; |
| 422 | LxtCheckErrno(LxtExecve(Filename, NULL, Environment)); |
| 423 | goto ErrorExit; |
| 424 | } |
| 425 | |
| 426 | // |
| 427 | // Wait for the child to exit. |
| 428 | // |
| 429 | |
| 430 | LxtCheckResult(LxtWaitPidPoll(ChildPid, LXT_RESULT_SUCCESS)); |
| 431 | |
| 432 | // |
| 433 | // Run the binary with null argument and environment arrays. |
| 434 | // |
| 435 | |
| 436 | LxtCheckErrno(ChildPid = fork()); |
| 437 | if (ChildPid == 0) |
| 438 | { |
| 439 | LxtCheckErrno(LxtExecve(Filename, NULL, NULL)); |
| 440 | goto ErrorExit; |
| 441 | } |
| 442 | |
| 443 | // |
| 444 | // Wait for the child to exit. |
| 445 | // |
| 446 | |
| 447 | LxtCheckResult(LxtWaitPidPoll(ChildPid, LXT_RESULT_SUCCESS)); |
| 448 | |
| 449 | // |
| 450 | // Create a script that uses #! to launch the test binary. |
| 451 | // |
| 452 | |
| 453 | LxtCheckErrno(Fd = creat(AUXV_TEST_SCRIPT, 0755)); |
| 454 | LxtCheckErrno(ByteCount = write(Fd, AUXV_TEST_SCRIPT_SOURCE, sizeof(AUXV_TEST_SCRIPT_SOURCE))); |
| 455 | LxtClose(Fd); |
| 456 | Fd = -1; |
| 457 | |
| 458 | // |
| 459 | // Recompile the binary with the script as the expected AT_EXECFN. |
| 460 | // |
| 461 | |
| 462 | Filename = AUXV_TEST_SCRIPT; |
| 463 | LxtCheckResult(AuxvAtExecfnCompile(Filename)); |
| 464 | |
| 465 | // |
| 466 | // Run the script with a non-null argument array. |
| 467 | // |
| 468 | |
| 469 | LxtCheckErrno(ChildPid = fork()); |
| 470 | if (ChildPid == 0) |
| 471 | { |
| 472 | Argv[0] = Filename; |
| 473 | Argv[1] = NULL; |
| 474 | LxtCheckErrno(execv(Filename, Argv)); |
| 475 | goto ErrorExit; |
| 476 | } |
| 477 | |
| 478 | LxtCheckResult(LxtWaitPidPoll(ChildPid, LXT_RESULT_SUCCESS)); |
| 479 | |
| 480 | // |
| 481 | // Run the script with a null argument array. |
| 482 | // |
| 483 | |
| 484 | LxtCheckErrno(ChildPid = fork()); |
| 485 | if (ChildPid == 0) |
| 486 | { |
| 487 | Environment[0] = "FOO=bar"; |
| 488 | Environment[1] = NULL; |
| 489 | LxtCheckErrno(LxtExecve(Filename, NULL, Environment)); |
| 490 | goto ErrorExit; |
| 491 | } |
| 492 | |
| 493 | // |
| 494 | // Wait for the child to exit. |
| 495 | // |
| 496 | |
| 497 | LxtCheckResult(LxtWaitPidPoll(ChildPid, LXT_RESULT_SUCCESS)); |
| 498 | |
| 499 | // |
| 500 | // Run the script with an Argv[0] that does not match the filename. |
| 501 | // |
| 502 | |
| 503 | LxtCheckErrno(ChildPid = fork()); |
| 504 | if (ChildPid == 0) |
| 505 | { |
| 506 | Argv[0] = "FOO"; |
| 507 | Argv[1] = NULL; |
| 508 | LxtCheckErrno(execv(Filename, Argv)); |
| 509 | goto ErrorExit; |
| 510 | } |
| 511 | |
| 512 | // |
| 513 | // Wait for the child to exit. |
| 514 | // |
| 515 | |
| 516 | LxtCheckResult(LxtWaitPidPoll(ChildPid, LXT_RESULT_SUCCESS)); |
| 517 | |
| 518 | // |
| 519 | // Run the script with an empty command line. |
| 520 | // |
| 521 | |
| 522 | LxtCheckErrno(ChildPid = fork()); |
| 523 | if (ChildPid == 0) |
| 524 | { |
| 525 | Environment[0] = "FOO=bar"; |
| 526 | Environment[1] = NULL; |
| 527 | LxtCheckErrno(LxtExecve(Filename, NULL, Environment)); |
| 528 | goto ErrorExit; |
| 529 | } |
| 530 | |
| 531 | // |
| 532 | // Wait for the child to exit. |
| 533 | // |
| 534 | |
| 535 | LxtCheckResult(LxtWaitPidPoll(ChildPid, LXT_RESULT_SUCCESS)); |
| 536 | |
| 537 | // |
| 538 | // Run the script with null argument and environment arrays. |
| 539 | // |
| 540 | |
| 541 | LxtCheckErrno(ChildPid = fork()); |
| 542 | if (ChildPid == 0) |
| 543 | { |
| 544 | LxtCheckErrno(LxtExecve(Filename, NULL, NULL)); |
| 545 | goto ErrorExit; |
| 546 | } |
| 547 | |
| 548 | // |
| 549 | // Wait for the child to exit. |
| 550 | // |
| 551 | |
| 552 | LxtCheckResult(LxtWaitPidPoll(ChildPid, LXT_RESULT_SUCCESS)); |
| 553 | |
| 554 | Result = LXT_RESULT_SUCCESS; |
| 555 | |
| 556 | ErrorExit: |
| 557 | if (Fd != -1) |
| 558 | { |
| 559 | LxtClose(Fd); |
| 560 | } |
| 561 | |
| 562 | if (ChildPid == 0) |
| 563 | { |
| 564 | _exit(Result); |
| 565 | } |
| 566 | |
| 567 | unlink(AUXV_TEST_PROGRAM_PATH); |
| 568 | unlink(AUXV_TEST_SCRIPT); |
| 569 | return Result; |
| 570 | } |