tools/testing/selftests/nolibc/nolibc-test.c

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2
   3 #define _GNU_SOURCE
   4 #define _LARGEFILE64_SOURCE
   5
   6 /* libc-specific include files
   7  * The program may be built in 3 ways:
   8  *   $(CC) -nostdlib -include /path/to/nolibc.h => NOLIBC already defined
   9  *   $(CC) -nostdlib -I/path/to/nolibc/sysroot  => _NOLIBC_* guards are present
  10  *   $(CC) with default libc                    => NOLIBC* never defined
  11  */
  12 #ifndef NOLIBC
  13 #include <stdio.h>
  14 #include <stdlib.h>
  15 #include <string.h>
  16 #ifndef _NOLIBC_STDIO_H
  17 /* standard libcs need more includes */
  18 #include <sys/io.h>
  19 #include <sys/ioctl.h>
  20 #include <sys/mman.h>
  21 #include <sys/mount.h>
  22 #include <sys/prctl.h>
  23 #include <sys/reboot.h>
  24 #include <sys/stat.h>
  25 #include <sys/syscall.h>
  26 #include <sys/sysmacros.h>
  27 #include <sys/time.h>
  28 #include <sys/wait.h>
  29 #include <dirent.h>
  30 #include <errno.h>
  31 #include <fcntl.h>
  32 #include <poll.h>
  33 #include <sched.h>
  34 #include <signal.h>
  35 #include <stdarg.h>
  36 #include <stddef.h>
  37 #include <stdint.h>
  38 #include <unistd.h>
  39 #include <limits.h>
  40 #endif
  41 #endif
  42
  43 /* for the type of int_fast16_t and int_fast32_t, musl differs from glibc and nolibc */
  44 #define SINT_MAX_OF_TYPE(type) (((type)1 << (sizeof(type) * 8 - 2)) - (type)1 + ((type)1 << (sizeof(type) * 8 - 2)))
  45 #define SINT_MIN_OF_TYPE(type) (-SINT_MAX_OF_TYPE(type) - 1)
  46
  47 /* will be used to test initialization of environ */
  48 static char **test_envp;
  49
  50 /* will be used by some test cases as readable file, please don't write it */
  51 static const char *argv0;
  52
  53 /* definition of a series of tests */
  54 struct test {
  55         const char *name;              /* test name */
  56         int (*func)(int min, int max); /* handler */
  57 };
  58
  59 #ifndef _NOLIBC_STDLIB_H
  60 char *itoa(int i)
  61 {
  62         static char buf[12];
  63         int ret;
  64
  65         ret = snprintf(buf, sizeof(buf), "%d", i);
  66         return (ret >= 0 && ret < sizeof(buf)) ? buf : "#err";
  67 }
  68 #endif
  69
  70 #define CASE_ERR(err) \
  71         case err: return #err
  72
  73 /* returns the error name (e.g. "ENOENT") for common errors, "SUCCESS" for 0,
  74  * or the decimal value for less common ones.
  75  */
  76 const char *errorname(int err)
  77 {
  78         switch (err) {
  79         case 0: return "SUCCESS";
  80         CASE_ERR(EPERM);
  81         CASE_ERR(ENOENT);
  82         CASE_ERR(ESRCH);
  83         CASE_ERR(EINTR);
  84         CASE_ERR(EIO);
  85         CASE_ERR(ENXIO);
  86         CASE_ERR(E2BIG);
  87         CASE_ERR(ENOEXEC);
  88         CASE_ERR(EBADF);
  89         CASE_ERR(ECHILD);
  90         CASE_ERR(EAGAIN);
  91         CASE_ERR(ENOMEM);
  92         CASE_ERR(EACCES);
  93         CASE_ERR(EFAULT);
  94         CASE_ERR(ENOTBLK);
  95         CASE_ERR(EBUSY);
  96         CASE_ERR(EEXIST);
  97         CASE_ERR(EXDEV);
  98         CASE_ERR(ENODEV);
  99         CASE_ERR(ENOTDIR);
 100         CASE_ERR(EISDIR);
 101         CASE_ERR(EINVAL);
 102         CASE_ERR(ENFILE);
 103         CASE_ERR(EMFILE);
 104         CASE_ERR(ENOTTY);
 105         CASE_ERR(ETXTBSY);
 106         CASE_ERR(EFBIG);
 107         CASE_ERR(ENOSPC);
 108         CASE_ERR(ESPIPE);
 109         CASE_ERR(EROFS);
 110         CASE_ERR(EMLINK);
 111         CASE_ERR(EPIPE);
 112         CASE_ERR(EDOM);
 113         CASE_ERR(ERANGE);
 114         CASE_ERR(ENOSYS);
 115         CASE_ERR(EOVERFLOW);
 116         default:
 117                 return itoa(err);
 118         }
 119 }
 120
 121 static void putcharn(char c, size_t n)
 122 {
 123         char buf[64];
 124
 125         memset(buf, c, n);
 126         buf[n] = '\0';
 127         fputs(buf, stdout);
 128 }
 129
 130 enum RESULT {
 131         OK,
 132         FAIL,
 133         SKIPPED,
 134 };
 135
 136 static void result(int llen, enum RESULT r)
 137 {
 138         const char *msg;
 139
 140         if (r == OK)
 141                 msg = " [OK]";
 142         else if (r == SKIPPED)
 143                 msg = "[SKIPPED]";
 144         else
 145                 msg = "[FAIL]";
 146
 147         putcharn(' ', 64 - llen);
 148         puts(msg);
 149 }
 150
 151 /* The tests below are intended to be used by the macroes, which evaluate
 152  * expression <expr>, print the status to stdout, and update the "ret"
 153  * variable to count failures. The functions themselves return the number
 154  * of failures, thus either 0 or 1.
 155  */
 156
 157 #define EXPECT_ZR(cond, expr)                           \
 158         do { if (!(cond)) result(llen, SKIPPED); else ret += expect_zr(expr, llen); } while (0)
 159
 160 static int expect_zr(int expr, int llen)
 161 {
 162         int ret = !(expr == 0);
 163
 164         llen += printf(" = %d ", expr);
 165         result(llen, ret ? FAIL : OK);
 166         return ret;
 167 }
 168
 169
 170 #define EXPECT_NZ(cond, expr, val)                      \
 171         do { if (!(cond)) result(llen, SKIPPED); else ret += expect_nz(expr, llen; } while (0)
 172
 173 static int expect_nz(int expr, int llen)
 174 {
 175         int ret = !(expr != 0);
 176
 177         llen += printf(" = %d ", expr);
 178         result(llen, ret ? FAIL : OK);
 179         return ret;
 180 }
 181
 182
 183 #define EXPECT_EQ(cond, expr, val)                              \
 184         do { if (!(cond)) result(llen, SKIPPED); else ret += expect_eq(expr, llen, val); } while (0)
 185
 186 static int expect_eq(uint64_t expr, int llen, uint64_t val)
 187 {
 188         int ret = !(expr == val);
 189
 190         llen += printf(" = %lld ", (long long)expr);
 191         result(llen, ret ? FAIL : OK);
 192         return ret;
 193 }
 194
 195
 196 #define EXPECT_NE(cond, expr, val)                              \
 197         do { if (!(cond)) result(llen, SKIPPED); else ret += expect_ne(expr, llen, val); } while (0)
 198
 199 static int expect_ne(int expr, int llen, int val)
 200 {
 201         int ret = !(expr != val);
 202
 203         llen += printf(" = %d ", expr);
 204         result(llen, ret ? FAIL : OK);
 205         return ret;
 206 }
 207
 208
 209 #define EXPECT_GE(cond, expr, val)                              \
 210         do { if (!(cond)) result(llen, SKIPPED); else ret += expect_ge(expr, llen, val); } while (0)
 211
 212 static int expect_ge(int expr, int llen, int val)
 213 {
 214         int ret = !(expr >= val);
 215
 216         llen += printf(" = %d ", expr);
 217         result(llen, ret ? FAIL : OK);
 218         return ret;
 219 }
 220
 221
 222 #define EXPECT_GT(cond, expr, val)                              \
 223         do { if (!(cond)) result(llen, SKIPPED); else ret += expect_gt(expr, llen, val); } while (0)
 224
 225 static int expect_gt(int expr, int llen, int val)
 226 {
 227         int ret = !(expr > val);
 228
 229         llen += printf(" = %d ", expr);
 230         result(llen, ret ? FAIL : OK);
 231         return ret;
 232 }
 233
 234
 235 #define EXPECT_LE(cond, expr, val)                              \
 236         do { if (!(cond)) result(llen, SKIPPED); else ret += expect_le(expr, llen, val); } while (0)
 237
 238 static int expect_le(int expr, int llen, int val)
 239 {
 240         int ret = !(expr <= val);
 241
 242         llen += printf(" = %d ", expr);
 243         result(llen, ret ? FAIL : OK);
 244         return ret;
 245 }
 246
 247
 248 #define EXPECT_LT(cond, expr, val)                              \
 249         do { if (!(cond)) result(llen, SKIPPED); else ret += expect_lt(expr, llen, val); } while (0)
 250
 251 static int expect_lt(int expr, int llen, int val)
 252 {
 253         int ret = !(expr < val);
 254
 255         llen += printf(" = %d ", expr);
 256         result(llen, ret ? FAIL : OK);
 257         return ret;
 258 }
 259
 260
 261 #define EXPECT_SYSZR(cond, expr)                                \
 262         do { if (!(cond)) result(llen, SKIPPED); else ret += expect_syszr(expr, llen); } while (0)
 263
 264 static int expect_syszr(int expr, int llen)
 265 {
 266         int ret = 0;
 267
 268         if (expr) {
 269                 ret = 1;
 270                 llen += printf(" = %d %s ", expr, errorname(errno));
 271                 result(llen, FAIL);
 272         } else {
 273                 llen += printf(" = %d ", expr);
 274                 result(llen, OK);
 275         }
 276         return ret;
 277 }
 278
 279
 280 #define EXPECT_SYSEQ(cond, expr, val)                           \
 281         do { if (!(cond)) result(llen, SKIPPED); else ret += expect_syseq(expr, llen, val); } while (0)
 282
 283 static int expect_syseq(int expr, int llen, int val)
 284 {
 285         int ret = 0;
 286
 287         if (expr != val) {
 288                 ret = 1;
 289                 llen += printf(" = %d %s ", expr, errorname(errno));
 290                 result(llen, FAIL);
 291         } else {
 292                 llen += printf(" = %d ", expr);
 293                 result(llen, OK);
 294         }
 295         return ret;
 296 }
 297
 298
 299 #define EXPECT_SYSNE(cond, expr, val)                           \
 300         do { if (!(cond)) result(llen, SKIPPED); else ret += expect_sysne(expr, llen, val); } while (0)
 301
 302 static int expect_sysne(int expr, int llen, int val)
 303 {
 304         int ret = 0;
 305
 306         if (expr == val) {
 307                 ret = 1;
 308                 llen += printf(" = %d %s ", expr, errorname(errno));
 309                 result(llen, FAIL);
 310         } else {
 311                 llen += printf(" = %d ", expr);
 312                 result(llen, OK);
 313         }
 314         return ret;
 315 }
 316
 317
 318 #define EXPECT_SYSER2(cond, expr, expret, experr1, experr2)             \
 319         do { if (!(cond)) result(llen, SKIPPED); else ret += expect_syserr2(expr, expret, experr1, experr2, llen); } while (0)
 320
 321 #define EXPECT_SYSER(cond, expr, expret, experr)                        \
 322         EXPECT_SYSER2(cond, expr, expret, experr, 0)
 323
 324 static int expect_syserr2(int expr, int expret, int experr1, int experr2, int llen)
 325 {
 326         int ret = 0;
 327         int _errno = errno;
 328
 329         llen += printf(" = %d %s ", expr, errorname(_errno));
 330         if (expr != expret || (_errno != experr1 && _errno != experr2)) {
 331                 ret = 1;
 332                 if (experr2 == 0)
 333                         llen += printf(" != (%d %s) ", expret, errorname(experr1));
 334                 else
 335                         llen += printf(" != (%d %s %s) ", expret, errorname(experr1), errorname(experr2));
 336                 result(llen, FAIL);
 337         } else {
 338                 result(llen, OK);
 339         }
 340         return ret;
 341 }
 342
 343
 344 #define EXPECT_PTRZR(cond, expr)                                \
 345         do { if (!(cond)) result(llen, SKIPPED); else ret += expect_ptrzr(expr, llen); } while (0)
 346
 347 static int expect_ptrzr(const void *expr, int llen)
 348 {
 349         int ret = 0;
 350
 351         llen += printf(" = <%p> ", expr);
 352         if (expr) {
 353                 ret = 1;
 354                 result(llen, FAIL);
 355         } else {
 356                 result(llen, OK);
 357         }
 358         return ret;
 359 }
 360
 361
 362 #define EXPECT_PTRNZ(cond, expr)                                \
 363         do { if (!(cond)) result(llen, SKIPPED); else ret += expect_ptrnz(expr, llen); } while (0)
 364
 365 static int expect_ptrnz(const void *expr, int llen)
 366 {
 367         int ret = 0;
 368
 369         llen += printf(" = <%p> ", expr);
 370         if (!expr) {
 371                 ret = 1;
 372                 result(llen, FAIL);
 373         } else {
 374                 result(llen, OK);
 375         }
 376         return ret;
 377 }
 378
 379 #define EXPECT_PTREQ(cond, expr, cmp)                           \
 380         do { if (!(cond)) result(llen, SKIPPED); else ret += expect_ptreq(expr, llen, cmp); } while (0)
 381
 382 static int expect_ptreq(const void *expr, int llen, const void *cmp)
 383 {
 384         int ret = 0;
 385
 386         llen += printf(" = <%p> ", expr);
 387         if (expr != cmp) {
 388                 ret = 1;
 389                 result(llen, FAIL);
 390         } else {
 391                 result(llen, OK);
 392         }
 393         return ret;
 394 }
 395
 396 #define EXPECT_PTRNE(cond, expr, cmp)                           \
 397         do { if (!(cond)) result(llen, SKIPPED); else ret += expect_ptrne(expr, llen, cmp); } while (0)
 398
 399 static int expect_ptrne(const void *expr, int llen, const void *cmp)
 400 {
 401         int ret = 0;
 402
 403         llen += printf(" = <%p> ", expr);
 404         if (expr == cmp) {
 405                 ret = 1;
 406                 result(llen, FAIL);
 407         } else {
 408                 result(llen, OK);
 409         }
 410         return ret;
 411 }
 412
 413 #define EXPECT_PTRER2(cond, expr, expret, experr1, experr2)             \
 414         do { if (!(cond)) result(llen, SKIPPED); else ret += expect_ptrerr2(expr, expret, experr1, experr2, llen); } while (0)
 415
 416 #define EXPECT_PTRER(cond, expr, expret, experr)                        \
 417         EXPECT_PTRER2(cond, expr, expret, experr, 0)
 418
 419 static int expect_ptrerr2(const void *expr, const void *expret, int experr1, int experr2, int llen)
 420 {
 421         int ret = 0;
 422         int _errno = errno;
 423
 424         llen += printf(" = <%p> %s ", expr, errorname(_errno));
 425         if (expr != expret || (_errno != experr1 && _errno != experr2)) {
 426                 ret = 1;
 427                 if (experr2 == 0)
 428                         llen += printf(" != (<%p> %s) ", expret, errorname(experr1));
 429                 else
 430                         llen += printf(" != (<%p> %s %s) ", expret, errorname(experr1), errorname(experr2));
 431                 result(llen, FAIL);
 432         } else {
 433                 result(llen, OK);
 434         }
 435         return ret;
 436 }
 437
 438 #define EXPECT_STRZR(cond, expr)                                \
 439         do { if (!(cond)) result(llen, SKIPPED); else ret += expect_strzr(expr, llen); } while (0)
 440
 441 static int expect_strzr(const char *expr, int llen)
 442 {
 443         int ret = 0;
 444
 445         llen += printf(" = <%s> ", expr);
 446         if (expr) {
 447                 ret = 1;
 448                 result(llen, FAIL);
 449         } else {
 450                 result(llen, OK);
 451         }
 452         return ret;
 453 }
 454
 455
 456 #define EXPECT_STRNZ(cond, expr)                                \
 457         do { if (!(cond)) result(llen, SKIPPED); else ret += expect_strnz(expr, llen); } while (0)
 458
 459 static int expect_strnz(const char *expr, int llen)
 460 {
 461         int ret = 0;
 462
 463         llen += printf(" = <%s> ", expr);
 464         if (!expr) {
 465                 ret = 1;
 466                 result(llen, FAIL);
 467         } else {
 468                 result(llen, OK);
 469         }
 470         return ret;
 471 }
 472
 473
 474 #define EXPECT_STREQ(cond, expr, cmp)                           \
 475         do { if (!(cond)) result(llen, SKIPPED); else ret += expect_streq(expr, llen, cmp); } while (0)
 476
 477 static int expect_streq(const char *expr, int llen, const char *cmp)
 478 {
 479         int ret = 0;
 480
 481         llen += printf(" = <%s> ", expr);
 482         if (strcmp(expr, cmp) != 0) {
 483                 ret = 1;
 484                 result(llen, FAIL);
 485         } else {
 486                 result(llen, OK);
 487         }
 488         return ret;
 489 }
 490
 491
 492 #define EXPECT_STRNE(cond, expr, cmp)                           \
 493         do { if (!(cond)) result(llen, SKIPPED); else ret += expect_strne(expr, llen, cmp); } while (0)
 494
 495 static int expect_strne(const char *expr, int llen, const char *cmp)
 496 {
 497         int ret = 0;
 498
 499         llen += printf(" = <%s> ", expr);
 500         if (strcmp(expr, cmp) == 0) {
 501                 ret = 1;
 502                 result(llen, FAIL);
 503         } else {
 504                 result(llen, OK);
 505         }
 506         return ret;
 507 }
 508
 509
 510 /* declare tests based on line numbers. There must be exactly one test per line. */
 511 #define CASE_TEST(name) \
 512         case __LINE__: llen += printf("%d %s", test, #name);
 513
 514
 515 /* used by some syscall tests below */
 516 int test_getdents64(const char *dir)
 517 {
 518         char buffer[4096];
 519         int fd, ret;
 520         int err;
 521
 522         ret = fd = open(dir, O_RDONLY | O_DIRECTORY, 0);
 523         if (ret < 0)
 524                 return ret;
 525
 526         ret = getdents64(fd, (void *)buffer, sizeof(buffer));
 527         err = errno;
 528         close(fd);
 529
 530         errno = err;
 531         return ret;
 532 }
 533
 534 static int test_getpagesize(void)
 535 {
 536         long x = getpagesize();
 537         int c;
 538
 539         if (x < 0)
 540                 return x;
 541
 542 #if defined(__x86_64__) || defined(__i386__) || defined(__i486__) || defined(__i586__) || defined(__i686__)
 543         /*
 544          * x86 family is always 4K page.
 545          */
 546         c = (x == 4096);
 547 #elif defined(__aarch64__)
 548         /*
 549          * Linux aarch64 supports three values of page size: 4K, 16K, and 64K
 550          * which are selected at kernel compilation time.
 551          */
 552         c = (x == 4096 || x == (16 * 1024) || x == (64 * 1024));
 553 #else
 554         /*
 555          * Assuming other architectures must have at least 4K page.
 556          */
 557         c = (x >= 4096);
 558 #endif
 559
 560         return !c;
 561 }
 562
 563 static int test_fork(void)
 564 {
 565         int status;
 566         pid_t pid;
 567
 568         /* flush the printf buffer to avoid child flush it */
 569         fflush(stdout);
 570         fflush(stderr);
 571
 572         pid = fork();
 573
 574         switch (pid) {
 575         case -1:
 576                 return 1;
 577
 578         case 0:
 579                 exit(123);
 580
 581         default:
 582                 pid = waitpid(pid, &status, 0);
 583
 584                 return pid == -1 || !WIFEXITED(status) || WEXITSTATUS(status) != 123;
 585         }
 586 }
 587
 588 static int test_stat_timestamps(void)
 589 {
 590         struct stat st;
 591
 592         if (sizeof(st.st_atim.tv_sec) != sizeof(st.st_atime))
 593                 return 1;
 594
 595         if (stat("/proc/self/", &st) && stat(argv0, &st) && stat("/", &st))
 596                 return 1;
 597
 598         if (st.st_atim.tv_sec != st.st_atime || st.st_atim.tv_nsec > 1000000000)
 599                 return 1;
 600
 601         if (st.st_mtim.tv_sec != st.st_mtime || st.st_mtim.tv_nsec > 1000000000)
 602                 return 1;
 603
 604         if (st.st_ctim.tv_sec != st.st_ctime || st.st_ctim.tv_nsec > 1000000000)
 605                 return 1;
 606
 607         return 0;
 608 }
 609
 610 int test_mmap_munmap(void)
 611 {
 612         int ret, fd, i;
 613         void *mem;
 614         size_t page_size, file_size, length;
 615         off_t offset, pa_offset;
 616         struct stat stat_buf;
 617         const char * const files[] = {
 618                 "/dev/zero",
 619                 "/proc/1/exe", "/proc/self/exe",
 620                 argv0,
 621                 NULL
 622         };
 623
 624         page_size = getpagesize();
 625         if (page_size < 0)
 626                 return -1;
 627
 628         /* find a right file to mmap, existed and accessible */
 629         for (i = 0; files[i] != NULL; i++) {
 630                 ret = fd = open(files[i], O_RDONLY);
 631                 if (ret == -1)
 632                         continue;
 633                 else
 634                         break;
 635         }
 636         if (ret == -1)
 637                 return ret;
 638
 639         ret = stat(files[i], &stat_buf);
 640         if (ret == -1)
 641                 goto end;
 642
 643         /* file size of the special /dev/zero is 0, let's assign one manually */
 644         if (i == 0)
 645                 file_size = 3*page_size;
 646         else
 647                 file_size = stat_buf.st_size;
 648
 649         offset = file_size - 1;
 650         if (offset < 0)
 651                 offset = 0;
 652         length = file_size - offset;
 653         pa_offset = offset & ~(page_size - 1);
 654
 655         mem = mmap(NULL, length + offset - pa_offset, PROT_READ, MAP_SHARED, fd, pa_offset);
 656         if (mem == MAP_FAILED) {
 657                 ret = -1;
 658                 goto end;
 659         }
 660
 661         ret = munmap(mem, length + offset - pa_offset);
 662
 663 end:
 664         close(fd);
 665         return ret;
 666 }
 667
 668
 669 /* Run syscall tests between IDs <min> and <max>.
 670  * Return 0 on success, non-zero on failure.
 671  */
 672 int run_syscall(int min, int max)
 673 {
 674         struct timeval tv;
 675         struct timezone tz;
 676         struct stat stat_buf;
 677         int euid0;
 678         int proc;
 679         int test;
 680         int tmp;
 681         int ret = 0;
 682         void *p1, *p2;
 683         int has_gettid = 1;
 684
 685         /* <proc> indicates whether or not /proc is mounted */
 686         proc = stat("/proc", &stat_buf) == 0;
 687
 688         /* this will be used to skip certain tests that can't be run unprivileged */
 689         euid0 = geteuid() == 0;
 690
 691         /* from 2.30, glibc provides gettid() */
 692 #if defined(__GLIBC_MINOR__) && defined(__GLIBC__)
 693         has_gettid = __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 30);
 694 #endif
 695
 696         for (test = min; test >= 0 && test <= max; test++) {
 697                 int llen = 0; /* line length */
 698
 699                 /* avoid leaving empty lines below, this will insert holes into
 700                  * test numbers.
 701                  */
 702                 switch (test + __LINE__ + 1) {
 703                 CASE_TEST(getpid);            EXPECT_SYSNE(1, getpid(), -1); break;
 704                 CASE_TEST(getppid);           EXPECT_SYSNE(1, getppid(), -1); break;
 705                 CASE_TEST(gettid);            EXPECT_SYSNE(has_gettid, gettid(), -1); break;
 706                 CASE_TEST(getpgid_self);      EXPECT_SYSNE(1, getpgid(0), -1); break;
 707                 CASE_TEST(getpgid_bad);       EXPECT_SYSER(1, getpgid(-1), -1, ESRCH); break;
 708                 CASE_TEST(kill_0);            EXPECT_SYSZR(1, kill(getpid(), 0)); break;
 709                 CASE_TEST(kill_CONT);         EXPECT_SYSZR(1, kill(getpid(), 0)); break;
 710                 CASE_TEST(kill_BADPID);       EXPECT_SYSER(1, kill(INT_MAX, 0), -1, ESRCH); break;
 711                 CASE_TEST(sbrk_0);            EXPECT_PTRNE(1, sbrk(0), (void *)-1); break;
 712                 CASE_TEST(sbrk);              if ((p1 = p2 = sbrk(4096)) != (void *)-1) p2 = sbrk(-4096); EXPECT_SYSZR(1, (p2 == (void *)-1) || p2 == p1); break;
 713                 CASE_TEST(brk);               EXPECT_SYSZR(1, brk(sbrk(0))); break;
 714                 CASE_TEST(chdir_root);        EXPECT_SYSZR(1, chdir("/")); chdir(getenv("PWD")); break;
 715                 CASE_TEST(chdir_dot);         EXPECT_SYSZR(1, chdir(".")); break;
 716                 CASE_TEST(chdir_blah);        EXPECT_SYSER(1, chdir("/blah"), -1, ENOENT); break;
 717                 CASE_TEST(chmod_argv0);       EXPECT_SYSZR(1, chmod(argv0, 0555)); break;
 718                 CASE_TEST(chmod_net);         EXPECT_SYSZR(proc, chmod("/proc/self/net", 0555)); break;
 719                 CASE_TEST(chmod_self);        EXPECT_SYSER(proc, chmod("/proc/self", 0555), -1, EPERM); break;
 720                 CASE_TEST(chown_self);        EXPECT_SYSER(proc, chown("/proc/self", 0, 0), -1, EPERM); break;
 721                 CASE_TEST(chroot_root);       EXPECT_SYSZR(euid0, chroot("/")); break;
 722                 CASE_TEST(chroot_blah);       EXPECT_SYSER(1, chroot("/proc/self/blah"), -1, ENOENT); break;
 723                 CASE_TEST(chroot_exe);        EXPECT_SYSER(1, chroot(argv0), -1, ENOTDIR); break;
 724                 CASE_TEST(close_m1);          EXPECT_SYSER(1, close(-1), -1, EBADF); break;
 725                 CASE_TEST(close_dup);         EXPECT_SYSZR(1, close(dup(0))); break;
 726                 CASE_TEST(dup_0);             tmp = dup(0);  EXPECT_SYSNE(1, tmp, -1); close(tmp); break;
 727                 CASE_TEST(dup_m1);            tmp = dup(-1); EXPECT_SYSER(1, tmp, -1, EBADF); if (tmp != -1) close(tmp); break;
 728                 CASE_TEST(dup2_0);            tmp = dup2(0, 100);  EXPECT_SYSNE(1, tmp, -1); close(tmp); break;
 729                 CASE_TEST(dup2_m1);           tmp = dup2(-1, 100); EXPECT_SYSER(1, tmp, -1, EBADF); if (tmp != -1) close(tmp); break;
 730                 CASE_TEST(dup3_0);            tmp = dup3(0, 100, 0);  EXPECT_SYSNE(1, tmp, -1); close(tmp); break;
 731                 CASE_TEST(dup3_m1);           tmp = dup3(-1, 100, 0); EXPECT_SYSER(1, tmp, -1, EBADF); if (tmp != -1) close(tmp); break;
 732                 CASE_TEST(execve_root);       EXPECT_SYSER(1, execve("/", (char*[]){ [0] = "/", [1] = NULL }, NULL), -1, EACCES); break;
 733                 CASE_TEST(fork);              EXPECT_SYSZR(1, test_fork()); break;
 734                 CASE_TEST(getdents64_root);   EXPECT_SYSNE(1, test_getdents64("/"), -1); break;
 735                 CASE_TEST(getdents64_null);   EXPECT_SYSER(1, test_getdents64("/dev/null"), -1, ENOTDIR); break;
 736                 CASE_TEST(gettimeofday_tv);   EXPECT_SYSZR(1, gettimeofday(&tv, NULL)); break;
 737                 CASE_TEST(gettimeofday_tv_tz);EXPECT_SYSZR(1, gettimeofday(&tv, &tz)); break;
 738                 CASE_TEST(getpagesize);       EXPECT_SYSZR(1, test_getpagesize()); break;
 739                 CASE_TEST(ioctl_tiocinq);     EXPECT_SYSZR(1, ioctl(0, TIOCINQ, &tmp)); break;
 740                 CASE_TEST(ioctl_tiocinq);     EXPECT_SYSZR(1, ioctl(0, TIOCINQ, &tmp)); break;
 741                 CASE_TEST(link_root1);        EXPECT_SYSER(1, link("/", "/"), -1, EEXIST); break;
 742                 CASE_TEST(link_blah);         EXPECT_SYSER(1, link("/proc/self/blah", "/blah"), -1, ENOENT); break;
 743                 CASE_TEST(link_dir);          EXPECT_SYSER(euid0, link("/", "/blah"), -1, EPERM); break;
 744                 CASE_TEST(link_cross);        EXPECT_SYSER(proc, link("/proc/self/cmdline", "/blah"), -1, EXDEV); break;
 745                 CASE_TEST(lseek_m1);          EXPECT_SYSER(1, lseek(-1, 0, SEEK_SET), -1, EBADF); break;
 746                 CASE_TEST(lseek_0);           EXPECT_SYSER(1, lseek(0, 0, SEEK_SET), -1, ESPIPE); break;
 747                 CASE_TEST(mkdir_root);        EXPECT_SYSER(1, mkdir("/", 0755), -1, EEXIST); break;
 748                 CASE_TEST(mmap_bad);          EXPECT_PTRER(1, mmap(NULL, 0, PROT_READ, MAP_PRIVATE, 0, 0), MAP_FAILED, EINVAL); break;
 749                 CASE_TEST(munmap_bad);        EXPECT_SYSER(1, munmap((void *)1, 0), -1, EINVAL); break;
 750                 CASE_TEST(mmap_munmap_good);  EXPECT_SYSZR(1, test_mmap_munmap()); break;
 751                 CASE_TEST(open_tty);          EXPECT_SYSNE(1, tmp = open("/dev/null", 0), -1); if (tmp != -1) close(tmp); break;
 752                 CASE_TEST(open_blah);         EXPECT_SYSER(1, tmp = open("/proc/self/blah", 0), -1, ENOENT); if (tmp != -1) close(tmp); break;
 753                 CASE_TEST(poll_null);         EXPECT_SYSZR(1, poll(NULL, 0, 0)); break;
 754                 CASE_TEST(poll_stdout);       EXPECT_SYSNE(1, ({ struct pollfd fds = { 1, POLLOUT, 0}; poll(&fds, 1, 0); }), -1); break;
 755                 CASE_TEST(poll_fault);        EXPECT_SYSER(1, poll((void *)1, 1, 0), -1, EFAULT); break;
 756                 CASE_TEST(prctl);             EXPECT_SYSER(1, prctl(PR_SET_NAME, (unsigned long)NULL, 0, 0, 0), -1, EFAULT); break;
 757                 CASE_TEST(read_badf);         EXPECT_SYSER(1, read(-1, &tmp, 1), -1, EBADF); break;
 758                 CASE_TEST(rmdir_blah);        EXPECT_SYSER(1, rmdir("/blah"), -1, ENOENT); break;
 759                 CASE_TEST(sched_yield);       EXPECT_SYSZR(1, sched_yield()); break;
 760                 CASE_TEST(select_null);       EXPECT_SYSZR(1, ({ struct timeval tv = { 0 }; select(0, NULL, NULL, NULL, &tv); })); break;
 761                 CASE_TEST(select_stdout);     EXPECT_SYSNE(1, ({ fd_set fds; FD_ZERO(&fds); FD_SET(1, &fds); select(2, NULL, &fds, NULL, NULL); }), -1); break;
 762                 CASE_TEST(select_fault);      EXPECT_SYSER(1, select(1, (void *)1, NULL, NULL, 0), -1, EFAULT); break;
 763                 CASE_TEST(stat_blah);         EXPECT_SYSER(1, stat("/proc/self/blah", &stat_buf), -1, ENOENT); break;
 764                 CASE_TEST(stat_fault);        EXPECT_SYSER(1, stat((void *)1, &stat_buf), -1, EFAULT); break;
 765                 CASE_TEST(stat_timestamps);   EXPECT_SYSZR(1, test_stat_timestamps()); break;
 766                 CASE_TEST(symlink_root);      EXPECT_SYSER(1, symlink("/", "/"), -1, EEXIST); break;
 767                 CASE_TEST(unlink_root);       EXPECT_SYSER(1, unlink("/"), -1, EISDIR); break;
 768                 CASE_TEST(unlink_blah);       EXPECT_SYSER(1, unlink("/proc/self/blah"), -1, ENOENT); break;
 769                 CASE_TEST(wait_child);        EXPECT_SYSER(1, wait(&tmp), -1, ECHILD); break;
 770                 CASE_TEST(waitpid_min);       EXPECT_SYSER(1, waitpid(INT_MIN, &tmp, WNOHANG), -1, ESRCH); break;
 771                 CASE_TEST(waitpid_child);     EXPECT_SYSER(1, waitpid(getpid(), &tmp, WNOHANG), -1, ECHILD); break;
 772                 CASE_TEST(write_badf);        EXPECT_SYSER(1, write(-1, &tmp, 1), -1, EBADF); break;
 773                 CASE_TEST(write_zero);        EXPECT_SYSZR(1, write(1, &tmp, 0)); break;
 774                 CASE_TEST(syscall_noargs);    EXPECT_SYSEQ(1, syscall(__NR_getpid), getpid()); break;
 775                 CASE_TEST(syscall_args);      EXPECT_SYSER(1, syscall(__NR_statx, 0, NULL, 0, 0, NULL), -1, EFAULT); break;
 776                 case __LINE__:
 777                         return ret; /* must be last */
 778                 /* note: do not set any defaults so as to permit holes above */
 779                 }
 780         }
 781         return ret;
 782 }
 783
 784 int run_stdlib(int min, int max)
 785 {
 786         int test;
 787         int tmp;
 788         int ret = 0;
 789         void *p1, *p2;
 790
 791         for (test = min; test >= 0 && test <= max; test++) {
 792                 int llen = 0; /* line length */
 793
 794                 /* avoid leaving empty lines below, this will insert holes into
 795                  * test numbers.
 796                  */
 797                 switch (test + __LINE__ + 1) {
 798                 CASE_TEST(environ);            EXPECT_PTREQ(1, environ, test_envp); break;
 799                 CASE_TEST(getenv_TERM);        EXPECT_STRNZ(1, getenv("TERM")); break;
 800                 CASE_TEST(getenv_blah);        EXPECT_STRZR(1, getenv("blah")); break;
 801                 CASE_TEST(setcmp_blah_blah);   EXPECT_EQ(1, strcmp("blah", "blah"), 0); break;
 802                 CASE_TEST(setcmp_blah_blah2);  EXPECT_NE(1, strcmp("blah", "blah2"), 0); break;
 803                 CASE_TEST(setncmp_blah_blah);  EXPECT_EQ(1, strncmp("blah", "blah", 10), 0); break;
 804                 CASE_TEST(setncmp_blah_blah4); EXPECT_EQ(1, strncmp("blah", "blah4", 4), 0); break;
 805                 CASE_TEST(setncmp_blah_blah5); EXPECT_NE(1, strncmp("blah", "blah5", 5), 0); break;
 806                 CASE_TEST(setncmp_blah_blah6); EXPECT_NE(1, strncmp("blah", "blah6", 6), 0); break;
 807                 CASE_TEST(strchr_foobar_o);    EXPECT_STREQ(1, strchr("foobar", 'o'), "oobar"); break;
 808                 CASE_TEST(strchr_foobar_z);    EXPECT_STRZR(1, strchr("foobar", 'z')); break;
 809                 CASE_TEST(strrchr_foobar_o);   EXPECT_STREQ(1, strrchr("foobar", 'o'), "obar"); break;
 810                 CASE_TEST(strrchr_foobar_z);   EXPECT_STRZR(1, strrchr("foobar", 'z')); break;
 811                 CASE_TEST(memcmp_20_20);       EXPECT_EQ(1, memcmp("aaa\x20", "aaa\x20", 4), 0); break;
 812                 CASE_TEST(memcmp_20_60);       EXPECT_LT(1, memcmp("aaa\x20", "aaa\x60", 4), 0); break;
 813                 CASE_TEST(memcmp_60_20);       EXPECT_GT(1, memcmp("aaa\x60", "aaa\x20", 4), 0); break;
 814                 CASE_TEST(memcmp_20_e0);       EXPECT_LT(1, memcmp("aaa\x20", "aaa\xe0", 4), 0); break;
 815                 CASE_TEST(memcmp_e0_20);       EXPECT_GT(1, memcmp("aaa\xe0", "aaa\x20", 4), 0); break;
 816                 CASE_TEST(memcmp_80_e0);       EXPECT_LT(1, memcmp("aaa\x80", "aaa\xe0", 4), 0); break;
 817                 CASE_TEST(memcmp_e0_80);       EXPECT_GT(1, memcmp("aaa\xe0", "aaa\x80", 4), 0); break;
 818                 CASE_TEST(limit_int8_max);          EXPECT_EQ(1, INT8_MAX,         (int8_t)          0x7f); break;
 819                 CASE_TEST(limit_int8_min);          EXPECT_EQ(1, INT8_MIN,         (int8_t)          0x80); break;
 820                 CASE_TEST(limit_uint8_max);         EXPECT_EQ(1, UINT8_MAX,        (uint8_t)         0xff); break;
 821                 CASE_TEST(limit_int16_max);         EXPECT_EQ(1, INT16_MAX,        (int16_t)         0x7fff); break;
 822                 CASE_TEST(limit_int16_min);         EXPECT_EQ(1, INT16_MIN,        (int16_t)         0x8000); break;
 823                 CASE_TEST(limit_uint16_max);        EXPECT_EQ(1, UINT16_MAX,       (uint16_t)        0xffff); break;
 824                 CASE_TEST(limit_int32_max);         EXPECT_EQ(1, INT32_MAX,        (int32_t)         0x7fffffff); break;
 825                 CASE_TEST(limit_int32_min);         EXPECT_EQ(1, INT32_MIN,        (int32_t)         0x80000000); break;
 826                 CASE_TEST(limit_uint32_max);        EXPECT_EQ(1, UINT32_MAX,       (uint32_t)        0xffffffff); break;
 827                 CASE_TEST(limit_int64_max);         EXPECT_EQ(1, INT64_MAX,        (int64_t)         0x7fffffffffffffff); break;
 828                 CASE_TEST(limit_int64_min);         EXPECT_EQ(1, INT64_MIN,        (int64_t)         0x8000000000000000); break;
 829                 CASE_TEST(limit_uint64_max);        EXPECT_EQ(1, UINT64_MAX,       (uint64_t)        0xffffffffffffffff); break;
 830                 CASE_TEST(limit_int_least8_max);    EXPECT_EQ(1, INT_LEAST8_MAX,   (int_least8_t)    0x7f); break;
 831                 CASE_TEST(limit_int_least8_min);    EXPECT_EQ(1, INT_LEAST8_MIN,   (int_least8_t)    0x80); break;
 832                 CASE_TEST(limit_uint_least8_max);   EXPECT_EQ(1, UINT_LEAST8_MAX,  (uint_least8_t)   0xff); break;
 833                 CASE_TEST(limit_int_least16_max);   EXPECT_EQ(1, INT_LEAST16_MAX,  (int_least16_t)   0x7fff); break;
 834                 CASE_TEST(limit_int_least16_min);   EXPECT_EQ(1, INT_LEAST16_MIN,  (int_least16_t)   0x8000); break;
 835                 CASE_TEST(limit_uint_least16_max);  EXPECT_EQ(1, UINT_LEAST16_MAX, (uint_least16_t)  0xffff); break;
 836                 CASE_TEST(limit_int_least32_max);   EXPECT_EQ(1, INT_LEAST32_MAX,  (int_least32_t)   0x7fffffff); break;
 837                 CASE_TEST(limit_int_least32_min);   EXPECT_EQ(1, INT_LEAST32_MIN,  (int_least32_t)   0x80000000); break;
 838                 CASE_TEST(limit_uint_least32_max);  EXPECT_EQ(1, UINT_LEAST32_MAX, (uint_least32_t)  0xffffffffU); break;
 839                 CASE_TEST(limit_int_least64_min);   EXPECT_EQ(1, INT_LEAST64_MIN,  (int_least64_t)   0x8000000000000000LL); break;
 840                 CASE_TEST(limit_int_least64_max);   EXPECT_EQ(1, INT_LEAST64_MAX,  (int_least64_t)   0x7fffffffffffffffLL); break;
 841                 CASE_TEST(limit_uint_least64_max);  EXPECT_EQ(1, UINT_LEAST64_MAX, (uint_least64_t)  0xffffffffffffffffULL); break;
 842                 CASE_TEST(limit_int_fast8_max);     EXPECT_EQ(1, INT_FAST8_MAX,    (int_fast8_t)     0x7f); break;
 843                 CASE_TEST(limit_int_fast8_min);     EXPECT_EQ(1, INT_FAST8_MIN,    (int_fast8_t)     0x80); break;
 844                 CASE_TEST(limit_uint_fast8_max);    EXPECT_EQ(1, UINT_FAST8_MAX,   (uint_fast8_t)    0xff); break;
 845                 CASE_TEST(limit_int_fast16_min);    EXPECT_EQ(1, INT_FAST16_MIN,   (int_fast16_t)    SINT_MIN_OF_TYPE(int_fast16_t)); break;
 846                 CASE_TEST(limit_int_fast16_max);    EXPECT_EQ(1, INT_FAST16_MAX,   (int_fast16_t)    SINT_MAX_OF_TYPE(int_fast16_t)); break;
 847                 CASE_TEST(limit_uint_fast16_max);   EXPECT_EQ(1, UINT_FAST16_MAX,  (uint_fast16_t)   UINTPTR_MAX); break;
 848                 CASE_TEST(limit_int_fast32_min);    EXPECT_EQ(1, INT_FAST32_MIN,   (int_fast32_t)    SINT_MIN_OF_TYPE(int_fast32_t)); break;
 849                 CASE_TEST(limit_int_fast32_max);    EXPECT_EQ(1, INT_FAST32_MAX,   (int_fast32_t)    SINT_MAX_OF_TYPE(int_fast32_t)); break;
 850                 CASE_TEST(limit_uint_fast32_max);   EXPECT_EQ(1, UINT_FAST32_MAX,  (uint_fast32_t)   UINTPTR_MAX); break;
 851                 CASE_TEST(limit_int_fast64_min);    EXPECT_EQ(1, INT_FAST64_MIN,   (int_fast64_t)    INT64_MIN); break;
 852                 CASE_TEST(limit_int_fast64_max);    EXPECT_EQ(1, INT_FAST64_MAX,   (int_fast64_t)    INT64_MAX); break;
 853                 CASE_TEST(limit_uint_fast64_max);   EXPECT_EQ(1, UINT_FAST64_MAX,  (uint_fast64_t)   UINT64_MAX); break;
 854 #if __SIZEOF_LONG__ == 8
 855                 CASE_TEST(limit_intptr_min);        EXPECT_EQ(1, INTPTR_MIN,       (intptr_t)        0x8000000000000000LL); break;
 856                 CASE_TEST(limit_intptr_max);        EXPECT_EQ(1, INTPTR_MAX,       (intptr_t)        0x7fffffffffffffffLL); break;
 857                 CASE_TEST(limit_uintptr_max);       EXPECT_EQ(1, UINTPTR_MAX,      (uintptr_t)       0xffffffffffffffffULL); break;
 858                 CASE_TEST(limit_ptrdiff_min);       EXPECT_EQ(1, PTRDIFF_MIN,      (ptrdiff_t)       0x8000000000000000LL); break;
 859                 CASE_TEST(limit_ptrdiff_max);       EXPECT_EQ(1, PTRDIFF_MAX,      (ptrdiff_t)       0x7fffffffffffffffLL); break;
 860                 CASE_TEST(limit_size_max);          EXPECT_EQ(1, SIZE_MAX,         (size_t)          0xffffffffffffffffULL); break;
 861 #elif __SIZEOF_LONG__ == 4
 862                 CASE_TEST(limit_intptr_min);        EXPECT_EQ(1, INTPTR_MIN,       (intptr_t)        0x80000000); break;
 863                 CASE_TEST(limit_intptr_max);        EXPECT_EQ(1, INTPTR_MAX,       (intptr_t)        0x7fffffff); break;
 864                 CASE_TEST(limit_uintptr_max);       EXPECT_EQ(1, UINTPTR_MAX,      (uintptr_t)       0xffffffffU); break;
 865                 CASE_TEST(limit_ptrdiff_min);       EXPECT_EQ(1, PTRDIFF_MIN,      (ptrdiff_t)       0x80000000); break;
 866                 CASE_TEST(limit_ptrdiff_max);       EXPECT_EQ(1, PTRDIFF_MAX,      (ptrdiff_t)       0x7fffffff); break;
 867                 CASE_TEST(limit_size_max);          EXPECT_EQ(1, SIZE_MAX,         (size_t)          0xffffffffU); break;
 868 #else
 869 # warning "__SIZEOF_LONG__ is undefined"
 870 #endif /* __SIZEOF_LONG__ */
 871                 case __LINE__:
 872                         return ret; /* must be last */
 873                 /* note: do not set any defaults so as to permit holes above */
 874                 }
 875         }
 876         return ret;
 877 }
 878
 879 #define EXPECT_VFPRINTF(c, expected, fmt, ...)                          \
 880         ret += expect_vfprintf(llen, c, expected, fmt, ##__VA_ARGS__)
 881
 882 static int expect_vfprintf(int llen, size_t c, const char *expected, const char *fmt, ...)
 883 {
 884         int ret, fd, w, r;
 885         char buf[100];
 886         FILE *memfile;
 887         va_list args;
 888
 889         fd = open("/tmp", O_TMPFILE | O_EXCL | O_RDWR, 0600);
 890         if (fd == -1) {
 891                 result(llen, SKIPPED);
 892                 return 0;
 893         }
 894
 895         memfile = fdopen(fd, "w+");
 896         if (!memfile) {
 897                 result(llen, FAIL);
 898                 return 1;
 899         }
 900
 901         va_start(args, fmt);
 902         w = vfprintf(memfile, fmt, args);
 903         va_end(args);
 904
 905         if (w != c) {
 906                 llen += printf(" written(%d) != %d", w, (int) c);
 907                 result(llen, FAIL);
 908                 return 1;
 909         }
 910
 911         fflush(memfile);
 912         lseek(fd, 0, SEEK_SET);
 913
 914         r = read(fd, buf, sizeof(buf) - 1);
 915         buf[r] = '\0';
 916
 917         fclose(memfile);
 918
 919         if (r != w) {
 920                 llen += printf(" written(%d) != read(%d)", w, r);
 921                 result(llen, FAIL);
 922                 return 1;
 923         }
 924
 925         llen += printf(" \"%s\" = \"%s\"", expected, buf);
 926         ret = strncmp(expected, buf, c);
 927
 928         result(llen, ret ? FAIL : OK);
 929         return ret;
 930 }
 931
 932 static int run_vfprintf(int min, int max)
 933 {
 934         int test;
 935         int tmp;
 936         int ret = 0;
 937         void *p1, *p2;
 938
 939         for (test = min; test >= 0 && test <= max; test++) {
 940                 int llen = 0; /* line length */
 941
 942                 /* avoid leaving empty lines below, this will insert holes into
 943                  * test numbers.
 944                  */
 945                 switch (test + __LINE__ + 1) {
 946                 CASE_TEST(empty);        EXPECT_VFPRINTF(0, "", ""); break;
 947                 CASE_TEST(simple);       EXPECT_VFPRINTF(3, "foo", "foo"); break;
 948                 CASE_TEST(string);       EXPECT_VFPRINTF(3, "foo", "%s", "foo"); break;
 949                 CASE_TEST(number);       EXPECT_VFPRINTF(4, "1234", "%d", 1234); break;
 950                 CASE_TEST(negnumber);    EXPECT_VFPRINTF(5, "-1234", "%d", -1234); break;
 951                 CASE_TEST(unsigned);     EXPECT_VFPRINTF(5, "12345", "%u", 12345); break;
 952                 CASE_TEST(char);         EXPECT_VFPRINTF(1, "c", "%c", 'c'); break;
 953                 CASE_TEST(hex);          EXPECT_VFPRINTF(1, "f", "%x", 0xf); break;
 954                 CASE_TEST(pointer);      EXPECT_VFPRINTF(3, "0x1", "%p", (void *) 0x1); break;
 955                 case __LINE__:
 956                         return ret; /* must be last */
 957                 /* note: do not set any defaults so as to permit holes above */
 958                 }
 959         }
 960         return ret;
 961 }
 962
 963 static int smash_stack(void)
 964 {
 965         char buf[100];
 966         volatile char *ptr = buf;
 967         size_t i;
 968
 969         for (i = 0; i < 200; i++)
 970                 ptr[i] = 'P';
 971
 972         return 1;
 973 }
 974
 975 static int run_protection(int min, int max)
 976 {
 977         pid_t pid;
 978         int llen = 0, status;
 979
 980         llen += printf("0 -fstackprotector ");
 981
 982 #if !defined(_NOLIBC_STACKPROTECTOR)
 983         llen += printf("not supported");
 984         result(llen, SKIPPED);
 985         return 0;
 986 #endif
 987
 988 #if defined(_NOLIBC_STACKPROTECTOR)
 989         if (!__stack_chk_guard) {
 990                 llen += printf("__stack_chk_guard not initialized");
 991                 result(llen, FAIL);
 992                 return 1;
 993         }
 994 #endif
 995
 996         pid = -1;
 997         pid = fork();
 998
 999         switch (pid) {
1000         case -1:
1001                 llen += printf("fork()");
1002                 result(llen, FAIL);
1003                 return 1;
1004
1005         case 0:
1006                 close(STDOUT_FILENO);
1007                 close(STDERR_FILENO);
1008
1009                 prctl(PR_SET_DUMPABLE, 0, 0, 0, 0);
1010                 smash_stack();
1011                 return 1;
1012
1013         default:
1014                 pid = waitpid(pid, &status, 0);
1015
1016                 if (pid == -1 || !WIFSIGNALED(status) || WTERMSIG(status) != SIGABRT) {
1017                         llen += printf("waitpid()");
1018                         result(llen, FAIL);
1019                         return 1;
1020                 }
1021                 result(llen, OK);
1022                 return 0;
1023         }
1024 }
1025
1026 /* prepare what needs to be prepared for pid 1 (stdio, /dev, /proc, etc) */
1027 int prepare(void)
1028 {
1029         struct stat stat_buf;
1030
1031         /* It's possible that /dev doesn't even exist or was not mounted, so
1032          * we'll try to create it, mount it, or create minimal entries into it.
1033          * We want at least /dev/null and /dev/console.
1034          */
1035         if (stat("/dev/.", &stat_buf) == 0 || mkdir("/dev", 0755) == 0) {
1036                 if (stat("/dev/console", &stat_buf) != 0 ||
1037                     stat("/dev/null", &stat_buf) != 0 ||
1038                     stat("/dev/zero", &stat_buf) != 0) {
1039                         /* try devtmpfs first, otherwise fall back to manual creation */
1040                         if (mount("/dev", "/dev", "devtmpfs", 0, 0) != 0) {
1041                                 mknod("/dev/console", 0600 | S_IFCHR, makedev(5, 1));
1042                                 mknod("/dev/null",    0666 | S_IFCHR, makedev(1, 3));
1043                                 mknod("/dev/zero",    0666 | S_IFCHR, makedev(1, 5));
1044                         }
1045                 }
1046         }
1047
1048         /* If no /dev/console was found before calling init, stdio is closed so
1049          * we need to reopen it from /dev/console. If it failed above, it will
1050          * still fail here and we cannot emit a message anyway.
1051          */
1052         if (close(dup(1)) == -1) {
1053                 int fd = open("/dev/console", O_RDWR);
1054
1055                 if (fd >= 0) {
1056                         if (fd != 0)
1057                                 dup2(fd, 0);
1058                         if (fd != 1)
1059                                 dup2(fd, 1);
1060                         if (fd != 2)
1061                                 dup2(fd, 2);
1062                         if (fd > 2)
1063                                 close(fd);
1064                         puts("\nSuccessfully reopened /dev/console.");
1065                 }
1066         }
1067
1068         /* try to mount /proc if not mounted. Silently fail otherwise */
1069         if (stat("/proc/.", &stat_buf) == 0 || mkdir("/proc", 0755) == 0) {
1070                 if (stat("/proc/self", &stat_buf) != 0) {
1071                         /* If not mountable, remove /proc completely to avoid misuse */
1072                         if (mount("none", "/proc", "proc", 0, 0) != 0)
1073                                 rmdir("/proc");
1074                 }
1075         }
1076
1077         /* some tests rely on a writable /tmp */
1078         mkdir("/tmp", 0755);
1079
1080         return 0;
1081 }
1082
1083 /* This is the definition of known test names, with their functions */
1084 static const struct test test_names[] = {
1085         /* add new tests here */
1086         { .name = "syscall",    .func = run_syscall    },
1087         { .name = "stdlib",     .func = run_stdlib     },
1088         { .name = "vfprintf",   .func = run_vfprintf   },
1089         { .name = "protection", .func = run_protection },
1090         { 0 }
1091 };
1092
1093 int is_setting_valid(char *test)
1094 {
1095         int idx, len, test_len, valid = 0;
1096         char delimiter;
1097
1098         if (!test)
1099                 return valid;
1100
1101         test_len = strlen(test);
1102
1103         for (idx = 0; test_names[idx].name; idx++) {
1104                 len = strlen(test_names[idx].name);
1105                 if (test_len < len)
1106                         continue;
1107
1108                 if (strncmp(test, test_names[idx].name, len) != 0)
1109                         continue;
1110
1111                 delimiter = test[len];
1112                 if (delimiter != ':' && delimiter != ',' && delimiter != '\0')
1113                         continue;
1114
1115                 valid = 1;
1116                 break;
1117         }
1118
1119         return valid;
1120 }
1121
1122 int main(int argc, char **argv, char **envp)
1123 {
1124         int min = 0;
1125         int max = INT_MAX;
1126         int ret = 0;
1127         int err;
1128         int idx;
1129         char *test;
1130
1131         argv0 = argv[0];
1132         test_envp = envp;
1133
1134         /* when called as init, it's possible that no console was opened, for
1135          * example if no /dev file system was provided. We'll check that fd#1
1136          * was opened, and if not we'll attempt to create and open /dev/console
1137          * and /dev/null that we'll use for later tests.
1138          */
1139         if (getpid() == 1)
1140                 prepare();
1141
1142         /* the definition of a series of tests comes from either argv[1] or the
1143          * "NOLIBC_TEST" environment variable. It's made of a comma-delimited
1144          * series of test names and optional ranges:
1145          *    syscall:5-15[:.*],stdlib:8-10
1146          */
1147         test = argv[1];
1148         if (!is_setting_valid(test))
1149                 test = getenv("NOLIBC_TEST");
1150
1151         if (is_setting_valid(test)) {
1152                 char *comma, *colon, *dash, *value;
1153
1154                 do {
1155                         comma = strchr(test, ',');
1156                         if (comma)
1157                                 *(comma++) = '\0';
1158
1159                         colon = strchr(test, ':');
1160                         if (colon)
1161                                 *(colon++) = '\0';
1162
1163                         for (idx = 0; test_names[idx].name; idx++) {
1164                                 if (strcmp(test, test_names[idx].name) == 0)
1165                                         break;
1166                         }
1167
1168                         if (test_names[idx].name) {
1169                                 /* The test was named, it will be called at least
1170                                  * once. We may have an optional range at <colon>
1171                                  * here, which defaults to the full range.
1172                                  */
1173                                 do {
1174                                         min = 0; max = INT_MAX;
1175                                         value = colon;
1176                                         if (value && *value) {
1177                                                 colon = strchr(value, ':');
1178                                                 if (colon)
1179                                                         *(colon++) = '\0';
1180
1181                                                 dash = strchr(value, '-');
1182                                                 if (dash)
1183                                                         *(dash++) = '\0';
1184
1185                                                 /* support :val: :min-max: :min-: :-max: */
1186                                                 if (*value)
1187                                                         min = atoi(value);
1188                                                 if (!dash)
1189                                                         max = min;
1190                                                 else if (*dash)
1191                                                         max = atoi(dash);
1192
1193                                                 value = colon;
1194                                         }
1195
1196                                         /* now's time to call the test */
1197                                         printf("Running test '%s'\n", test_names[idx].name);
1198                                         err = test_names[idx].func(min, max);
1199                                         ret += err;
1200                                         printf("Errors during this test: %d\n\n", err);
1201                                 } while (colon && *colon);
1202                         } else
1203                                 printf("Ignoring unknown test name '%s'\n", test);
1204
1205                         test = comma;
1206                 } while (test && *test);
1207         } else {
1208                 /* no test mentioned, run everything */
1209                 for (idx = 0; test_names[idx].name; idx++) {
1210                         printf("Running test '%s'\n", test_names[idx].name);
1211                         err = test_names[idx].func(min, max);
1212                         ret += err;
1213                         printf("Errors during this test: %d\n\n", err);
1214                 }
1215         }
1216
1217         printf("Total number of errors: %d\n", ret);
1218
1219         if (getpid() == 1) {
1220                 /* we're running as init, there's no other process on the
1221                  * system, thus likely started from a VM for a quick check.
1222                  * Exiting will provoke a kernel panic that may be reported
1223                  * as an error by Qemu or the hypervisor, while stopping
1224                  * cleanly will often be reported as a success. This allows
1225                  * to use the output of this program for bisecting kernels.
1226                  */
1227                 printf("Leaving init with final status: %d\n", !!ret);
1228                 if (ret == 0)
1229                         reboot(RB_POWER_OFF);
1230 #if defined(__x86_64__)
1231                 /* QEMU started with "-device isa-debug-exit -no-reboot" will
1232                  * exit with status code 2N+1 when N is written to 0x501. We
1233                  * hard-code the syscall here as it's arch-dependent.
1234                  */
1235                 else if (syscall(__NR_ioperm, 0x501, 1, 1) == 0)
1236                         __asm__ volatile ("outb %%al, %%dx" :: "d"(0x501), "a"(0));
1237                 /* if it does nothing, fall back to the regular panic */
1238 #endif
1239         }
1240
1241         printf("Exiting with status %d\n", !!ret);
1242         return !!ret;
1243 }