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

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