nptl/tst-setuid1.c

   1 /* Copyright (C) 2004-2017 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Jakub Jelinek <jaku@redhat.com>, 2004.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <pthread.h>
  20 #include <pwd.h>
  21 #include <grp.h>
  22 #include <stdlib.h>
  23 #include <stdio.h>
  24 #include <sys/wait.h>
  25 #include <unistd.h>
  26
  27
  28 static pthread_barrier_t b3, b4;
  29 static uid_t prev_ruid, prev_euid, prev_suid, nobody_uid;
  30 static gid_t prev_rgid, prev_egid, prev_sgid, nobody_gid;
  31 enum ACTION { PREPARE, SET, CHECK_BEFORE, CHECK_AFTER };
  32 #define TESTNO(arg) ((long int) (arg) & 0xff)
  33 #define THREADNO(arg) ((long int) (arg) >> 8)
  34
  35
  36 static void
  37 check_prev_uid (int tno)
  38 {
  39   uid_t ruid, euid, suid;
  40   if (getresuid (&ruid, &euid, &suid) < 0)
  41     {
  42       printf ("getresuid failed: %d %m\n", tno);
  43       exit (1);
  44     }
  45
  46   if (ruid != prev_ruid || euid != prev_euid || suid != prev_suid)
  47     {
  48       printf ("uids before in %d (%d %d %d) != (%d %d %d)\n", tno,
  49               ruid, euid, suid, prev_ruid, prev_euid, prev_suid);
  50       exit (1);
  51     }
  52 }
  53
  54
  55 static void
  56 check_prev_gid (int tno)
  57 {
  58   gid_t rgid, egid, sgid;
  59   if (getresgid (&rgid, &egid, &sgid) < 0)
  60     {
  61       printf ("getresgid failed: %d %m\n", tno);
  62       exit (1);
  63     }
  64
  65   if (rgid != prev_rgid || egid != prev_egid || sgid != prev_sgid)
  66     {
  67       printf ("gids before in %d (%d %d %d) != (%d %d %d)\n", tno,
  68               rgid, egid, sgid, prev_rgid, prev_egid, prev_sgid);
  69       exit (1);
  70     }
  71 }
  72
  73
  74 static void
  75 test_setuid1 (enum ACTION action, int tno)
  76 {
  77   if (action == PREPARE)
  78     return;
  79
  80   if (action != CHECK_AFTER)
  81     check_prev_uid (tno);
  82
  83   if (action == SET && setuid (nobody_uid) < 0)
  84     {
  85        printf ("setuid failed: %m\n");
  86        exit (1);
  87     }
  88
  89   if (action != CHECK_BEFORE)
  90     {
  91       uid_t ruid, euid, suid;
  92       if (getresuid (&ruid, &euid, &suid) < 0)
  93         {
  94           printf ("getresuid failed: %d %m\n", tno);
  95           exit (1);
  96         }
  97
  98       if (ruid != nobody_uid || euid != nobody_uid || suid != nobody_uid)
  99         {
 100           printf ("after setuid %d (%d %d %d) != (%d %d %d)\n", tno,
 101                   ruid, euid, suid, nobody_uid, nobody_uid, nobody_uid);
 102           exit (1);
 103         }
 104     }
 105 }
 106
 107
 108 static void
 109 test_setuid2 (enum ACTION action, int tno)
 110 {
 111   if (action == PREPARE)
 112     {
 113       if (setresuid (nobody_uid, nobody_uid, -1) < 0)
 114         {
 115           printf ("setresuid failed: %m\n");
 116           exit (1);
 117         }
 118
 119       prev_ruid = nobody_uid;
 120       prev_euid = nobody_uid;
 121       return;
 122     }
 123
 124   if (action != CHECK_AFTER)
 125     check_prev_uid (tno);
 126
 127   if (action == SET && setuid (prev_suid) < 0)
 128     {
 129       printf ("setuid failed: %m\n");
 130       exit (1);
 131     }
 132
 133   if (action != CHECK_BEFORE)
 134     {
 135       uid_t ruid, euid, suid;
 136       if (getresuid (&ruid, &euid, &suid) < 0)
 137         {
 138           printf ("getresuid failed: %d %m\n", tno);
 139           exit (1);
 140         }
 141
 142       if (ruid != nobody_uid || euid != prev_suid || suid != prev_suid)
 143         {
 144           printf ("after setuid %d (%d %d %d) != (%d %d %d)\n", tno,
 145                   ruid, euid, suid, nobody_uid, prev_suid, prev_suid);
 146           exit (1);
 147         }
 148     }
 149 }
 150
 151
 152 static void
 153 test_seteuid1 (enum ACTION action, int tno)
 154 {
 155   if (action == PREPARE)
 156     return;
 157
 158   if (action != CHECK_AFTER)
 159     check_prev_uid (tno);
 160
 161   if (action == SET && seteuid (nobody_uid) < 0)
 162     {
 163        printf ("seteuid failed: %m\n");
 164        exit (1);
 165     }
 166
 167   if (action != CHECK_BEFORE)
 168     {
 169       uid_t ruid, euid, suid;
 170       if (getresuid (&ruid, &euid, &suid) < 0)
 171         {
 172           printf ("getresuid failed: %d %m\n", tno);
 173           exit (1);
 174         }
 175
 176       if (ruid != prev_ruid || euid != nobody_uid || suid != prev_suid)
 177         {
 178           printf ("after seteuid %d (%d %d %d) != (%d %d %d)\n", tno,
 179                   ruid, euid, suid, prev_ruid, nobody_uid, prev_suid);
 180           exit (1);
 181         }
 182     }
 183 }
 184
 185
 186 static void
 187 test_seteuid2 (enum ACTION action, int tno)
 188 {
 189   if (action == PREPARE)
 190     {
 191       if (setresuid (nobody_uid, nobody_uid, -1) < 0)
 192         {
 193           printf ("setresuid failed: %m\n");
 194           exit (1);
 195         }
 196
 197       prev_ruid = nobody_uid;
 198       prev_euid = nobody_uid;
 199       nobody_uid = prev_suid;
 200       return;
 201     }
 202
 203   test_seteuid1 (action, tno);
 204 }
 205
 206
 207 static void
 208 test_setreuid1 (enum ACTION action, int tno)
 209 {
 210   if (action == PREPARE)
 211     return;
 212
 213   if (action != CHECK_AFTER)
 214     check_prev_uid (tno);
 215
 216   if (action == SET && setreuid (-1, nobody_uid) < 0)
 217     {
 218        printf ("setreuid failed: %m\n");
 219        exit (1);
 220     }
 221
 222   if (action != CHECK_BEFORE)
 223     {
 224       uid_t ruid, euid, suid, esuid;
 225       if (getresuid (&ruid, &euid, &suid) < 0)
 226         {
 227           printf ("getresuid failed: %d %m\n", tno);
 228           exit (1);
 229         }
 230
 231       if (prev_ruid != nobody_uid)
 232         esuid = nobody_uid;
 233       else
 234         esuid = prev_suid;
 235
 236       if (ruid != prev_ruid || euid != nobody_uid || suid != esuid)
 237         {
 238           printf ("after setreuid %d (%d %d %d) != (%d %d %d)\n", tno,
 239                   ruid, euid, suid, prev_ruid, nobody_uid, esuid);
 240           exit (1);
 241         }
 242     }
 243 }
 244
 245
 246 static void
 247 test_setreuid2 (enum ACTION action, int tno)
 248 {
 249   if (action == PREPARE)
 250     return;
 251
 252   if (action != CHECK_AFTER)
 253     check_prev_uid (tno);
 254
 255   if (action == SET && setreuid (nobody_uid, -1) < 0)
 256     {
 257        printf ("setreuid failed: %m\n");
 258        exit (1);
 259     }
 260
 261   if (action != CHECK_BEFORE)
 262     {
 263       uid_t ruid, euid, suid;
 264       if (getresuid (&ruid, &euid, &suid) < 0)
 265         {
 266           printf ("getresuid failed: %d %m\n", tno);
 267           exit (1);
 268         }
 269
 270       if (ruid != nobody_uid || euid != prev_euid || suid != prev_euid)
 271         {
 272           printf ("after setreuid %d (%d %d %d) != (%d %d %d)\n", tno,
 273                   ruid, euid, suid, nobody_uid, prev_euid, prev_euid);
 274           exit (1);
 275         }
 276     }
 277 }
 278
 279
 280 static void
 281 test_setreuid3 (enum ACTION action, int tno)
 282 {
 283   if (action == PREPARE)
 284     return;
 285
 286   if (action != CHECK_AFTER)
 287     check_prev_uid (tno);
 288
 289   if (action == SET && setreuid (nobody_uid, nobody_uid) < 0)
 290     {
 291        printf ("setreuid failed: %m\n");
 292        exit (1);
 293     }
 294
 295   if (action != CHECK_BEFORE)
 296     {
 297       uid_t ruid, euid, suid;
 298       if (getresuid (&ruid, &euid, &suid) < 0)
 299         {
 300           printf ("getresuid failed: %d %m\n", tno);
 301           exit (1);
 302         }
 303
 304       if (ruid != nobody_uid || euid != nobody_uid || suid != nobody_uid)
 305         {
 306           printf ("after setreuid %d (%d %d %d) != (%d %d %d)\n", tno,
 307                   ruid, euid, suid, nobody_uid, nobody_uid, nobody_uid);
 308           exit (1);
 309         }
 310     }
 311 }
 312
 313
 314 static void
 315 test_setreuid4 (enum ACTION action, int tno)
 316 {
 317   if (action == PREPARE)
 318     {
 319       if (setresuid (nobody_uid, nobody_uid, -1) < 0)
 320         {
 321           printf ("setresuid failed: %m\n");
 322           exit (1);
 323         }
 324
 325       prev_ruid = nobody_uid;
 326       prev_euid = nobody_uid;
 327       nobody_uid = prev_suid;
 328       return;
 329     }
 330
 331   test_setreuid1 (action, tno);
 332 }
 333
 334
 335 static void
 336 test_setresuid1 (enum ACTION action, int tno)
 337 {
 338   if (action == PREPARE)
 339     return;
 340
 341   if (action != CHECK_AFTER)
 342     check_prev_uid (tno);
 343
 344   if (action == SET && setresuid (-1, nobody_uid, -1) < 0)
 345     {
 346        printf ("setresuid failed: %m\n");
 347        exit (1);
 348     }
 349
 350   if (action != CHECK_BEFORE)
 351     {
 352       uid_t ruid, euid, suid;
 353       if (getresuid (&ruid, &euid, &suid) < 0)
 354         {
 355           printf ("getresuid failed: %d %m\n", tno);
 356           exit (1);
 357         }
 358
 359       if (ruid != prev_ruid || euid != nobody_uid || suid != prev_suid)
 360         {
 361           printf ("after setresuid %d (%d %d %d) != (%d %d %d)\n", tno,
 362                   ruid, euid, suid, prev_ruid, nobody_uid, prev_suid);
 363           exit (1);
 364         }
 365     }
 366 }
 367
 368
 369 static void
 370 test_setresuid2 (enum ACTION action, int tno)
 371 {
 372   if (action == PREPARE)
 373     return;
 374
 375   if (action != CHECK_AFTER)
 376     check_prev_uid (tno);
 377
 378   if (action == SET && setresuid (prev_euid, nobody_uid, nobody_uid) < 0)
 379     {
 380        printf ("setresuid failed: %m\n");
 381        exit (1);
 382     }
 383
 384   if (action != CHECK_BEFORE)
 385     {
 386       uid_t ruid, euid, suid;
 387       if (getresuid (&ruid, &euid, &suid) < 0)
 388         {
 389           printf ("getresuid failed: %d %m\n", tno);
 390           exit (1);
 391         }
 392
 393       if (ruid != prev_euid || euid != nobody_uid || suid != nobody_uid)
 394         {
 395           printf ("after setresuid %d (%d %d %d) != (%d %d %d)\n", tno,
 396                   ruid, euid, suid, prev_euid, nobody_uid, nobody_uid);
 397           exit (1);
 398         }
 399     }
 400 }
 401
 402
 403 static void
 404 test_setresuid3 (enum ACTION action, int tno)
 405 {
 406   if (action == PREPARE)
 407     return;
 408
 409   if (action != CHECK_AFTER)
 410     check_prev_uid (tno);
 411
 412   if (action == SET && setresuid (nobody_uid, nobody_uid, nobody_uid) < 0)
 413     {
 414        printf ("setresuid failed: %m\n");
 415        exit (1);
 416     }
 417
 418   if (action != CHECK_BEFORE)
 419     {
 420       uid_t ruid, euid, suid;
 421       if (getresuid (&ruid, &euid, &suid) < 0)
 422         {
 423           printf ("getresuid failed: %d %m\n", tno);
 424           exit (1);
 425         }
 426
 427       if (ruid != nobody_uid || euid != nobody_uid || suid != nobody_uid)
 428         {
 429           printf ("after setresuid %d (%d %d %d) != (%d %d %d)\n", tno,
 430                   ruid, euid, suid, nobody_uid, nobody_uid, nobody_uid);
 431           exit (1);
 432         }
 433     }
 434 }
 435
 436
 437 static void
 438 test_setresuid4 (enum ACTION action, int tno)
 439 {
 440   if (action == PREPARE)
 441     {
 442       if (setresuid (nobody_uid, nobody_uid, -1) < 0)
 443         {
 444           printf ("setresuid failed: %m\n");
 445           exit (1);
 446         }
 447
 448       prev_ruid = nobody_uid;
 449       prev_euid = nobody_uid;
 450       nobody_uid = prev_suid;
 451       return;
 452     }
 453
 454   test_setresuid1 (action, tno);
 455 }
 456
 457
 458 static void
 459 test_setgid1 (enum ACTION action, int tno)
 460 {
 461   if (action == PREPARE)
 462     return;
 463
 464   if (action != CHECK_AFTER)
 465     check_prev_gid (tno);
 466
 467   if (action == SET && setgid (nobody_gid) < 0)
 468     {
 469        printf ("setgid failed: %m\n");
 470        exit (1);
 471     }
 472
 473   if (action != CHECK_BEFORE)
 474     {
 475       gid_t rgid, egid, sgid;
 476       if (getresgid (&rgid, &egid, &sgid) < 0)
 477         {
 478           printf ("getresgid failed: %d %m\n", tno);
 479           exit (1);
 480         }
 481
 482       if (rgid != nobody_gid || egid != nobody_gid || sgid != nobody_gid)
 483         {
 484           printf ("after setgid %d (%d %d %d) != (%d %d %d)\n", tno,
 485                   rgid, egid, sgid, nobody_gid, nobody_gid, nobody_gid);
 486           exit (1);
 487         }
 488     }
 489 }
 490
 491
 492 static void
 493 test_setgid2 (enum ACTION action, int tno)
 494 {
 495   if (action == PREPARE)
 496     {
 497       if (setresgid (nobody_gid, nobody_gid, -1) < 0)
 498         {
 499           printf ("setresgid failed: %m\n");
 500           exit (1);
 501         }
 502
 503       prev_rgid = nobody_gid;
 504       prev_egid = nobody_gid;
 505
 506       if (setresuid (nobody_uid, nobody_uid, -1) < 0)
 507         {
 508           printf ("setresuid failed: %m\n");
 509           exit (1);
 510         }
 511
 512       prev_ruid = nobody_uid;
 513       prev_euid = nobody_uid;
 514       return;
 515     }
 516
 517   if (action != CHECK_AFTER)
 518     check_prev_gid (tno);
 519
 520   if (action == SET && setgid (prev_sgid) < 0)
 521     {
 522       printf ("setgid failed: %m\n");
 523       exit (1);
 524     }
 525
 526   if (action != CHECK_BEFORE)
 527     {
 528       gid_t rgid, egid, sgid;
 529       if (getresgid (&rgid, &egid, &sgid) < 0)
 530         {
 531           printf ("getresgid failed: %d %m\n", tno);
 532           exit (1);
 533         }
 534
 535       if (rgid != nobody_gid || egid != prev_sgid || sgid != prev_sgid)
 536         {
 537           printf ("after setgid %d (%d %d %d) != (%d %d %d)\n", tno,
 538                   rgid, egid, sgid, nobody_gid, prev_sgid, prev_sgid);
 539           exit (1);
 540         }
 541     }
 542 }
 543
 544
 545 static void
 546 test_setegid1 (enum ACTION action, int tno)
 547 {
 548   if (action == PREPARE)
 549     return;
 550
 551   if (action != CHECK_AFTER)
 552     check_prev_gid (tno);
 553
 554   if (action == SET && setegid (nobody_gid) < 0)
 555     {
 556        printf ("setegid failed: %m\n");
 557        exit (1);
 558     }
 559
 560   if (action != CHECK_BEFORE)
 561     {
 562       gid_t rgid, egid, sgid;
 563       if (getresgid (&rgid, &egid, &sgid) < 0)
 564         {
 565           printf ("getresgid failed: %d %m\n", tno);
 566           exit (1);
 567         }
 568
 569       if (rgid != prev_rgid || egid != nobody_gid || sgid != prev_sgid)
 570         {
 571           printf ("after setegid %d (%d %d %d) != (%d %d %d)\n", tno,
 572                   rgid, egid, sgid, prev_rgid, nobody_gid, prev_sgid);
 573           exit (1);
 574         }
 575     }
 576 }
 577
 578
 579 static void
 580 test_setegid2 (enum ACTION action, int tno)
 581 {
 582   if (action == PREPARE)
 583     {
 584       if (setresgid (nobody_gid, nobody_gid, -1) < 0)
 585         {
 586           printf ("setresgid failed: %m\n");
 587           exit (1);
 588         }
 589
 590       prev_rgid = nobody_gid;
 591       prev_egid = nobody_gid;
 592       nobody_gid = prev_sgid;
 593       return;
 594     }
 595
 596   test_setegid1 (action, tno);
 597 }
 598
 599
 600 static void
 601 test_setregid1 (enum ACTION action, int tno)
 602 {
 603   if (action == PREPARE)
 604     return;
 605
 606   if (action != CHECK_AFTER)
 607     check_prev_gid (tno);
 608
 609   if (action == SET && setregid (-1, nobody_gid) < 0)
 610     {
 611        printf ("setregid failed: %m\n");
 612        exit (1);
 613     }
 614
 615   if (action != CHECK_BEFORE)
 616     {
 617       gid_t rgid, egid, sgid, esgid;
 618       if (getresgid (&rgid, &egid, &sgid) < 0)
 619         {
 620           printf ("getresgid failed: %d %m\n", tno);
 621           exit (1);
 622         }
 623
 624       if (prev_rgid != nobody_gid)
 625         esgid = nobody_gid;
 626       else
 627         esgid = prev_sgid;
 628
 629       if (rgid != prev_rgid || egid != nobody_gid || sgid != esgid)
 630         {
 631           printf ("after setregid %d (%d %d %d) != (%d %d %d)\n", tno,
 632                   rgid, egid, sgid, prev_rgid, nobody_gid, esgid);
 633           exit (1);
 634         }
 635     }
 636 }
 637
 638
 639 static void
 640 test_setregid2 (enum ACTION action, int tno)
 641 {
 642   if (action == PREPARE)
 643     return;
 644
 645   if (action != CHECK_AFTER)
 646     check_prev_gid (tno);
 647
 648   if (action == SET && setregid (nobody_gid, -1) < 0)
 649     {
 650        printf ("setregid failed: %m\n");
 651        exit (1);
 652     }
 653
 654   if (action != CHECK_BEFORE)
 655     {
 656       gid_t rgid, egid, sgid;
 657       if (getresgid (&rgid, &egid, &sgid) < 0)
 658         {
 659           printf ("getresgid failed: %d %m\n", tno);
 660           exit (1);
 661         }
 662
 663       if (rgid != nobody_gid || egid != prev_egid || sgid != prev_egid)
 664         {
 665           printf ("after setregid %d (%d %d %d) != (%d %d %d)\n", tno,
 666                   rgid, egid, sgid, nobody_gid, prev_egid, prev_egid);
 667           exit (1);
 668         }
 669     }
 670 }
 671
 672
 673 static void
 674 test_setregid3 (enum ACTION action, int tno)
 675 {
 676   if (action == PREPARE)
 677     return;
 678
 679   if (action != CHECK_AFTER)
 680     check_prev_gid (tno);
 681
 682   if (action == SET && setregid (nobody_gid, nobody_gid) < 0)
 683     {
 684        printf ("setregid failed: %m\n");
 685        exit (1);
 686     }
 687
 688   if (action != CHECK_BEFORE)
 689     {
 690       gid_t rgid, egid, sgid;
 691       if (getresgid (&rgid, &egid, &sgid) < 0)
 692         {
 693           printf ("getresgid failed: %d %m\n", tno);
 694           exit (1);
 695         }
 696
 697       if (rgid != nobody_gid || egid != nobody_gid || sgid != nobody_gid)
 698         {
 699           printf ("after setregid %d (%d %d %d) != (%d %d %d)\n", tno,
 700                   rgid, egid, sgid, nobody_gid, nobody_gid, nobody_gid);
 701           exit (1);
 702         }
 703     }
 704 }
 705
 706
 707 static void
 708 test_setregid4 (enum ACTION action, int tno)
 709 {
 710   if (action == PREPARE)
 711     {
 712       if (setresgid (nobody_gid, nobody_gid, -1) < 0)
 713         {
 714           printf ("setresgid failed: %m\n");
 715           exit (1);
 716         }
 717
 718       prev_rgid = nobody_gid;
 719       prev_egid = nobody_gid;
 720       nobody_gid = prev_sgid;
 721       return;
 722     }
 723
 724   test_setregid1 (action, tno);
 725 }
 726
 727
 728 static void
 729 test_setresgid1 (enum ACTION action, int tno)
 730 {
 731   if (action == PREPARE)
 732     return;
 733
 734   if (action != CHECK_AFTER)
 735     check_prev_gid (tno);
 736
 737   if (action == SET && setresgid (-1, nobody_gid, -1) < 0)
 738     {
 739        printf ("setresgid failed: %m\n");
 740        exit (1);
 741     }
 742
 743   if (action != CHECK_BEFORE)
 744     {
 745       gid_t rgid, egid, sgid;
 746       if (getresgid (&rgid, &egid, &sgid) < 0)
 747         {
 748           printf ("getresgid failed: %d %m\n", tno);
 749           exit (1);
 750         }
 751
 752       if (rgid != prev_rgid || egid != nobody_gid || sgid != prev_sgid)
 753         {
 754           printf ("after setresgid %d (%d %d %d) != (%d %d %d)\n", tno,
 755                   rgid, egid, sgid, prev_rgid, nobody_gid, prev_sgid);
 756           exit (1);
 757         }
 758     }
 759 }
 760
 761
 762 static void
 763 test_setresgid2 (enum ACTION action, int tno)
 764 {
 765   if (action == PREPARE)
 766     return;
 767
 768   if (action != CHECK_AFTER)
 769     check_prev_gid (tno);
 770
 771   if (action == SET && setresgid (prev_egid, nobody_gid, nobody_gid) < 0)
 772     {
 773        printf ("setresgid failed: %m\n");
 774        exit (1);
 775     }
 776
 777   if (action != CHECK_BEFORE)
 778     {
 779       gid_t rgid, egid, sgid;
 780       if (getresgid (&rgid, &egid, &sgid) < 0)
 781         {
 782           printf ("getresgid failed: %d %m\n", tno);
 783           exit (1);
 784         }
 785
 786       if (rgid != prev_egid || egid != nobody_gid || sgid != nobody_gid)
 787         {
 788           printf ("after setresgid %d (%d %d %d) != (%d %d %d)\n", tno,
 789                   rgid, egid, sgid, prev_egid, nobody_gid, nobody_gid);
 790           exit (1);
 791         }
 792     }
 793 }
 794
 795
 796 static void
 797 test_setresgid3 (enum ACTION action, int tno)
 798 {
 799   if (action == PREPARE)
 800     return;
 801
 802   if (action != CHECK_AFTER)
 803     check_prev_gid (tno);
 804
 805   if (action == SET && setresgid (nobody_gid, nobody_gid, nobody_gid) < 0)
 806     {
 807        printf ("setresgid failed: %m\n");
 808        exit (1);
 809     }
 810
 811   if (action != CHECK_BEFORE)
 812     {
 813       gid_t rgid, egid, sgid;
 814       if (getresgid (&rgid, &egid, &sgid) < 0)
 815         {
 816           printf ("getresgid failed: %d %m\n", tno);
 817           exit (1);
 818         }
 819
 820       if (rgid != nobody_gid || egid != nobody_gid || sgid != nobody_gid)
 821         {
 822           printf ("after setresgid %d (%d %d %d) != (%d %d %d)\n", tno,
 823                   rgid, egid, sgid, nobody_gid, nobody_gid, nobody_gid);
 824           exit (1);
 825         }
 826     }
 827 }
 828
 829
 830 static void
 831 test_setresgid4 (enum ACTION action, int tno)
 832 {
 833   if (action == PREPARE)
 834     {
 835       if (setresgid (nobody_gid, nobody_gid, -1) < 0)
 836         {
 837           printf ("setresgid failed: %m\n");
 838           exit (1);
 839         }
 840
 841       prev_rgid = nobody_gid;
 842       prev_egid = nobody_gid;
 843       nobody_gid = prev_sgid;
 844       return;
 845     }
 846
 847   test_setresgid1 (action, tno);
 848 }
 849
 850
 851 static struct setuid_test
 852 {
 853   const char *name;
 854   void (*test) (enum ACTION, int tno);
 855 } setuid_tests[] =
 856 {
 857   { "setuid1", test_setuid1 },
 858   { "setuid2", test_setuid2 },
 859   { "seteuid1", test_seteuid1 },
 860   { "seteuid2", test_seteuid2 },
 861   { "setreuid1", test_setreuid1 },
 862   { "setreuid2", test_setreuid2 },
 863   { "setreuid3", test_setreuid3 },
 864   { "setreuid4", test_setreuid4 },
 865   { "setresuid1", test_setresuid1 },
 866   { "setresuid2", test_setresuid2 },
 867   { "setresuid3", test_setresuid3 },
 868   { "setresuid4", test_setresuid4 },
 869   { "setgid1", test_setgid1 },
 870   { "setgid2", test_setgid2 },
 871   { "setegid1", test_setegid1 },
 872   { "setegid2", test_setegid2 },
 873   { "setregid1", test_setregid1 },
 874   { "setregid2", test_setregid2 },
 875   { "setregid3", test_setregid3 },
 876   { "setregid4", test_setregid4 },
 877   { "setresgid1", test_setresgid1 },
 878   { "setresgid2", test_setresgid2 },
 879   { "setresgid3", test_setresgid3 },
 880   { "setresgid4", test_setresgid4 }
 881 };
 882
 883
 884 static void *
 885 tf2 (void *arg)
 886 {
 887   int e = pthread_barrier_wait (&b4);
 888   if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD)
 889     {
 890       puts ("barrier_wait failed");
 891       exit (1);
 892     }
 893
 894   setuid_tests[TESTNO (arg)].test (CHECK_AFTER, THREADNO (arg));
 895   return NULL;
 896 }
 897
 898
 899 static void *
 900 tf (void *arg)
 901 {
 902   setuid_tests[TESTNO (arg)].test (CHECK_BEFORE, THREADNO (arg));
 903
 904   int e = pthread_barrier_wait (&b3);
 905   if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD)
 906     {
 907       puts ("barrier_wait failed");
 908       exit (1);
 909     }
 910
 911   return tf2 (arg);
 912 }
 913
 914
 915 static int
 916 do_one_test (long int testno)
 917 {
 918   printf ("%s test\n", setuid_tests[testno].name);
 919
 920   pid_t pid = fork ();
 921   if (pid == 0)
 922     {
 923       setuid_tests[testno].test (PREPARE, 0);
 924       setuid_tests[testno].test (SET, 0);
 925       exit (0);
 926     }
 927
 928   if (pid < 0)
 929     {
 930       printf ("fork failed: %m\n");
 931       exit (1);
 932     }
 933
 934   int status;
 935   if (waitpid (pid, &status, 0) < 0)
 936     {
 937       printf ("waitpid failed: %m\n");
 938       exit (1);
 939     }
 940
 941   if (!WIFEXITED (status))
 942     {
 943       puts ("child did not exit");
 944       exit (1);
 945     }
 946
 947   if (WEXITSTATUS (status))
 948     {
 949       printf ("skipping %s test\n", setuid_tests[testno].name);
 950       return 0;
 951     }
 952
 953   pid = fork ();
 954   if (pid == 0)
 955     {
 956       setuid_tests[testno].test (PREPARE, 0);
 957
 958       pthread_t th;
 959       int e = pthread_create (&th, NULL, tf, (void *) (testno | 0x100L));
 960       if (e != 0)
 961         {
 962           printf ("create failed: %m\n");
 963           exit (1);
 964         }
 965
 966       pthread_t th2;
 967       e = pthread_create (&th2, NULL, tf, (void *) (testno | 0x200L));
 968       if (e != 0)
 969         {
 970           printf ("create failed: %m\n");
 971           exit (1);
 972         }
 973
 974       e = pthread_barrier_wait (&b3);
 975       if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD)
 976         {
 977           puts ("barrier_wait failed");
 978           exit (1);
 979         }
 980
 981       setuid_tests[testno].test (SET, 0);
 982
 983       pthread_t th3;
 984       e = pthread_create (&th3, NULL, tf2, (void *) (testno | 0x300L));
 985       if (e != 0)
 986         {
 987           printf ("create failed: %m\n");
 988           exit (1);
 989         }
 990
 991       e = pthread_barrier_wait (&b4);
 992       if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD)
 993         {
 994           puts ("barrier_wait failed");
 995           exit (1);
 996         }
 997
 998       exit (0);
 999     }
1000
1001   if (pid < 0)
1002     {
1003       printf ("fork failed: %m\n");
1004       exit (1);
1005     }
1006
1007   if (waitpid (pid, &status, 0) < 0)
1008     {
1009       printf ("waitpid failed: %m\n");
1010       exit (1);
1011     }
1012
1013   if (!WIFEXITED (status))
1014     {
1015       puts ("second child did not exit");
1016       exit (1);
1017     }
1018
1019   if (WEXITSTATUS (status))
1020     exit (WEXITSTATUS (status));
1021
1022   return 0;
1023 }
1024
1025
1026 static int
1027 do_test (void)
1028 {
1029   struct passwd *pwd = getpwnam ("nobody");
1030   if (pwd == NULL)
1031     {
1032       puts ("User nobody doesn't exist");
1033       return 0;
1034     }
1035   nobody_uid = pwd->pw_uid;
1036   nobody_gid = pwd->pw_gid;
1037
1038   if (getresuid (&prev_ruid, &prev_euid, &prev_suid) < 0)
1039     {
1040       printf ("getresuid failed: %m\n");
1041       exit (1);
1042     }
1043
1044   if (getresgid (&prev_rgid, &prev_egid, &prev_sgid) < 0)
1045     {
1046       printf ("getresgid failed: %m\n");
1047       exit (1);
1048     }
1049
1050   if (prev_ruid == nobody_uid || prev_euid == nobody_uid
1051       || prev_suid == nobody_uid)
1052     {
1053       puts ("already running as user nobody, skipping tests");
1054       exit (0);
1055     }
1056
1057   if (prev_rgid == nobody_gid || prev_egid == nobody_gid
1058       || prev_sgid == nobody_gid)
1059     {
1060       puts ("already running as group nobody, skipping tests");
1061       exit (0);
1062     }
1063
1064   if (pthread_barrier_init (&b3, NULL, 3) != 0)
1065     {
1066       puts ("barrier_init failed");
1067       exit (1);
1068     }
1069
1070   if (pthread_barrier_init (&b4, NULL, 4) != 0)
1071     {
1072       puts ("barrier_init failed");
1073       exit (1);
1074     }
1075
1076   for (unsigned long int testno = 0;
1077        testno < sizeof (setuid_tests) / sizeof (setuid_tests[0]);
1078        ++testno)
1079     do_one_test (testno);
1080   return 0;
1081 }
1082
1083 #define TEST_FUNCTION do_test ()
1084 #include "../test-skeleton.c"