debug/tst-chk1.c

   1 /* Copyright (C) 2004-2017 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Jakub Jelinek <jakub@redhat.com>, 2004.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 /* This file tests gets.  Force it to be declared.  */
  20 #include <features.h>
  21 #undef __GLIBC_USE_DEPRECATED_GETS
  22 #define __GLIBC_USE_DEPRECATED_GETS 1
  23
  24 #include <assert.h>
  25 #include <fcntl.h>
  26 #include <locale.h>
  27 #include <obstack.h>
  28 #include <setjmp.h>
  29 #include <signal.h>
  30 #include <stdio.h>
  31 #include <stdlib.h>
  32 #include <string.h>
  33 #include <unistd.h>
  34 #include <wchar.h>
  35 #include <sys/poll.h>
  36 #include <sys/select.h>
  37 #include <sys/socket.h>
  38 #include <sys/un.h>
  39
  40
  41 #define obstack_chunk_alloc malloc
  42 #define obstack_chunk_free free
  43
  44 char *temp_filename;
  45 static void do_prepare (void);
  46 static int do_test (void);
  47 #define PREPARE(argc, argv) do_prepare ()
  48 #define TEST_FUNCTION do_test ()
  49 #include "../test-skeleton.c"
  50
  51 static void
  52 do_prepare (void)
  53 {
  54   int temp_fd = create_temp_file ("tst-chk1.", &temp_filename);
  55   if (temp_fd == -1)
  56     {
  57       printf ("cannot create temporary file: %m\n");
  58       exit (1);
  59     }
  60
  61   const char *strs = "abcdefgh\nABCDEFGHI\nabcdefghij\nABCDEFGHIJ";
  62   if ((size_t) write (temp_fd, strs, strlen (strs)) != strlen (strs))
  63     {
  64       puts ("could not write test strings into file");
  65       unlink (temp_filename);
  66       exit (1);
  67     }
  68 }
  69
  70 volatile int chk_fail_ok;
  71 volatile int ret;
  72 jmp_buf chk_fail_buf;
  73
  74 static void
  75 handler (int sig)
  76 {
  77   if (chk_fail_ok)
  78     {
  79       chk_fail_ok = 0;
  80       longjmp (chk_fail_buf, 1);
  81     }
  82   else
  83     _exit (127);
  84 }
  85
  86 char buf[10];
  87 wchar_t wbuf[10];
  88 volatile size_t l0;
  89 volatile char *p;
  90 volatile wchar_t *wp;
  91 const char *str1 = "JIHGFEDCBA";
  92 const char *str2 = "F";
  93 const char *str3 = "%s%n%s%n";
  94 const char *str4 = "Hello, ";
  95 const char *str5 = "World!\n";
  96 const wchar_t *wstr1 = L"JIHGFEDCBA";
  97 const wchar_t *wstr2 = L"F";
  98 const wchar_t *wstr3 = L"%s%n%s%n";
  99 const wchar_t *wstr4 = L"Hello, ";
 100 const wchar_t *wstr5 = L"World!\n";
 101 char buf2[10] = "%s";
 102 int num1 = 67;
 103 int num2 = 987654;
 104
 105 #define FAIL() \
 106   do { printf ("Failure on line %d\n", __LINE__); ret = 1; } while (0)
 107 #define CHK_FAIL_START \
 108   chk_fail_ok = 1;                              \
 109   if (! setjmp (chk_fail_buf))                  \
 110     {
 111 #define CHK_FAIL_END \
 112       chk_fail_ok = 0;                          \
 113       FAIL ();                                  \
 114     }
 115 #if __USE_FORTIFY_LEVEL >= 2 && (!defined __cplusplus || defined __va_arg_pack)
 116 # define CHK_FAIL2_START CHK_FAIL_START
 117 # define CHK_FAIL2_END CHK_FAIL_END
 118 #else
 119 # define CHK_FAIL2_START
 120 # define CHK_FAIL2_END
 121 #endif
 122
 123 static int
 124 do_test (void)
 125 {
 126   set_fortify_handler (handler);
 127
 128   struct A { char buf1[9]; char buf2[1]; } a;
 129   struct wA { wchar_t buf1[9]; wchar_t buf2[1]; } wa;
 130
 131   printf ("Test checking routines at fortify level %d\n",
 132 #ifdef __USE_FORTIFY_LEVEL
 133           (int) __USE_FORTIFY_LEVEL
 134 #else
 135           0
 136 #endif
 137           );
 138
 139 #if defined __USE_FORTIFY_LEVEL && !defined __fortify_function
 140   printf ("Test skipped");
 141   if (l0 == 0)
 142     return 0;
 143 #endif
 144
 145   /* These ops can be done without runtime checking of object size.  */
 146   memcpy (buf, "abcdefghij", 10);
 147   memmove (buf + 1, buf, 9);
 148   if (memcmp (buf, "aabcdefghi", 10))
 149     FAIL ();
 150
 151   memcpy (buf, "abcdefghij", 10);
 152   bcopy (buf, buf + 1, 9);
 153   if (memcmp (buf, "aabcdefghi", 10))
 154     FAIL ();
 155
 156   if (mempcpy (buf + 5, "abcde", 5) != buf + 10
 157       || memcmp (buf, "aabcdabcde", 10))
 158     FAIL ();
 159
 160   memset (buf + 8, 'j', 2);
 161   if (memcmp (buf, "aabcdabcjj", 10))
 162     FAIL ();
 163
 164   bzero (buf + 8, 2);
 165   if (memcmp (buf, "aabcdabc\0\0", 10))
 166     FAIL ();
 167
 168   explicit_bzero (buf + 6, 4);
 169   if (memcmp (buf, "aabcda\0\0\0\0", 10))
 170     FAIL ();
 171
 172   strcpy (buf + 4, "EDCBA");
 173   if (memcmp (buf, "aabcEDCBA", 10))
 174     FAIL ();
 175
 176   if (stpcpy (buf + 8, "F") != buf + 9 || memcmp (buf, "aabcEDCBF", 10))
 177     FAIL ();
 178
 179   strncpy (buf + 6, "X", 4);
 180   if (memcmp (buf, "aabcEDX\0\0", 10))
 181     FAIL ();
 182
 183   if (sprintf (buf + 7, "%s", "67") != 2 || memcmp (buf, "aabcEDX67", 10))
 184     FAIL ();
 185
 186   if (snprintf (buf + 7, 3, "%s", "987654") != 6
 187       || memcmp (buf, "aabcEDX98", 10))
 188     FAIL ();
 189
 190   /* These ops need runtime checking, but shouldn't __chk_fail.  */
 191   memcpy (buf, "abcdefghij", l0 + 10);
 192   memmove (buf + 1, buf, l0 + 9);
 193   if (memcmp (buf, "aabcdefghi", 10))
 194     FAIL ();
 195
 196   memcpy (buf, "abcdefghij", l0 + 10);
 197   bcopy (buf, buf + 1, l0 + 9);
 198   if (memcmp (buf, "aabcdefghi", 10))
 199     FAIL ();
 200
 201   if (mempcpy (buf + 5, "abcde", l0 + 5) != buf + 10
 202       || memcmp (buf, "aabcdabcde", 10))
 203     FAIL ();
 204
 205   memset (buf + 8, 'j', l0 + 2);
 206   if (memcmp (buf, "aabcdabcjj", 10))
 207     FAIL ();
 208
 209   bzero (buf + 8, l0 + 2);
 210   if (memcmp (buf, "aabcdabc\0\0", 10))
 211     FAIL ();
 212
 213   explicit_bzero (buf + 6, l0 + 4);
 214   if (memcmp (buf, "aabcda\0\0\0\0", 10))
 215     FAIL ();
 216
 217   strcpy (buf + 4, str1 + 5);
 218   if (memcmp (buf, "aabcEDCBA", 10))
 219     FAIL ();
 220
 221   if (stpcpy (buf + 8, str2) != buf + 9 || memcmp (buf, "aabcEDCBF", 10))
 222     FAIL ();
 223
 224   strncpy (buf + 6, "X", l0 + 4);
 225   if (memcmp (buf, "aabcEDX\0\0", 10))
 226     FAIL ();
 227
 228   if (stpncpy (buf + 5, "cd", l0 + 5) != buf + 7
 229       || memcmp (buf, "aabcEcd\0\0", 10))
 230     FAIL ();
 231
 232   if (sprintf (buf + 7, "%d", num1) != 2 || memcmp (buf, "aabcEcd67", 10))
 233     FAIL ();
 234
 235   if (snprintf (buf + 7, 3, "%d", num2) != 6 || memcmp (buf, "aabcEcd98", 10))
 236     FAIL ();
 237
 238   buf[l0 + 8] = '\0';
 239   strcat (buf, "A");
 240   if (memcmp (buf, "aabcEcd9A", 10))
 241     FAIL ();
 242
 243   buf[l0 + 7] = '\0';
 244   strncat (buf, "ZYXWV", l0 + 2);
 245   if (memcmp (buf, "aabcEcdZY", 10))
 246     FAIL ();
 247
 248   /* The following tests are supposed to succeed at all fortify
 249      levels, even though they overflow a.buf1 into a.buf2.  */
 250   memcpy (a.buf1, "abcdefghij", l0 + 10);
 251   memmove (a.buf1 + 1, a.buf1, l0 + 9);
 252   if (memcmp (a.buf1, "aabcdefghi", 10))
 253     FAIL ();
 254
 255   memcpy (a.buf1, "abcdefghij", l0 + 10);
 256   bcopy (a.buf1, a.buf1 + 1, l0 + 9);
 257   if (memcmp (a.buf1, "aabcdefghi", 10))
 258     FAIL ();
 259
 260   if (mempcpy (a.buf1 + 5, "abcde", l0 + 5) != a.buf1 + 10
 261       || memcmp (a.buf1, "aabcdabcde", 10))
 262     FAIL ();
 263
 264   memset (a.buf1 + 8, 'j', l0 + 2);
 265   if (memcmp (a.buf1, "aabcdabcjj", 10))
 266     FAIL ();
 267
 268   bzero (a.buf1 + 8, l0 + 2);
 269   if (memcmp (a.buf1, "aabcdabc\0\0", 10))
 270     FAIL ();
 271
 272   explicit_bzero (a.buf1 + 6, l0 + 4);
 273   if (memcmp (a.buf1, "aabcda\0\0\0\0", 10))
 274     FAIL ();
 275
 276 #if __USE_FORTIFY_LEVEL < 2
 277   /* The following tests are supposed to crash with -D_FORTIFY_SOURCE=2
 278      and sufficient GCC support, as the string operations overflow
 279      from a.buf1 into a.buf2.  */
 280   strcpy (a.buf1 + 4, str1 + 5);
 281   if (memcmp (a.buf1, "aabcEDCBA", 10))
 282     FAIL ();
 283
 284   if (stpcpy (a.buf1 + 8, str2) != a.buf1 + 9
 285       || memcmp (a.buf1, "aabcEDCBF", 10))
 286     FAIL ();
 287
 288   strncpy (a.buf1 + 6, "X", l0 + 4);
 289   if (memcmp (a.buf1, "aabcEDX\0\0", 10))
 290     FAIL ();
 291
 292   if (sprintf (a.buf1 + 7, "%d", num1) != 2
 293       || memcmp (a.buf1, "aabcEDX67", 10))
 294     FAIL ();
 295
 296   if (snprintf (a.buf1 + 7, 3, "%d", num2) != 6
 297       || memcmp (a.buf1, "aabcEDX98", 10))
 298     FAIL ();
 299
 300   a.buf1[l0 + 8] = '\0';
 301   strcat (a.buf1, "A");
 302   if (memcmp (a.buf1, "aabcEDX9A", 10))
 303     FAIL ();
 304
 305   a.buf1[l0 + 7] = '\0';
 306   strncat (a.buf1, "ZYXWV", l0 + 2);
 307   if (memcmp (a.buf1, "aabcEDXZY", 10))
 308     FAIL ();
 309
 310 #endif
 311
 312 #if __USE_FORTIFY_LEVEL >= 1
 313   /* Now check if all buffer overflows are caught at runtime.
 314      N.B. All tests involving a length parameter need to be done
 315      twice: once with the length a compile-time constant, once without.  */
 316
 317   CHK_FAIL_START
 318   memcpy (buf + 1, "abcdefghij", 10);
 319   CHK_FAIL_END
 320
 321   CHK_FAIL_START
 322   memcpy (buf + 1, "abcdefghij", l0 + 10);
 323   CHK_FAIL_END
 324
 325   CHK_FAIL_START
 326   memmove (buf + 2, buf + 1, 9);
 327   CHK_FAIL_END
 328
 329   CHK_FAIL_START
 330   memmove (buf + 2, buf + 1, l0 + 9);
 331   CHK_FAIL_END
 332
 333   CHK_FAIL_START
 334   bcopy (buf + 1, buf + 2, 9);
 335   CHK_FAIL_END
 336
 337   CHK_FAIL_START
 338   bcopy (buf + 1, buf + 2, l0 + 9);
 339   CHK_FAIL_END
 340
 341   CHK_FAIL_START
 342   p = (char *) mempcpy (buf + 6, "abcde", 5);
 343   CHK_FAIL_END
 344
 345   CHK_FAIL_START
 346   p = (char *) mempcpy (buf + 6, "abcde", l0 + 5);
 347   CHK_FAIL_END
 348
 349   CHK_FAIL_START
 350   memset (buf + 9, 'j', 2);
 351   CHK_FAIL_END
 352
 353   CHK_FAIL_START
 354   memset (buf + 9, 'j', l0 + 2);
 355   CHK_FAIL_END
 356
 357   CHK_FAIL_START
 358   bzero (buf + 9, 2);
 359   CHK_FAIL_END
 360
 361   CHK_FAIL_START
 362   bzero (buf + 9, l0 + 2);
 363   CHK_FAIL_END
 364
 365   CHK_FAIL_START
 366   explicit_bzero (buf + 9, 2);
 367   CHK_FAIL_END
 368
 369   CHK_FAIL_START
 370   explicit_bzero (buf + 9, l0 + 2);
 371   CHK_FAIL_END
 372
 373   CHK_FAIL_START
 374   strcpy (buf + 5, str1 + 5);
 375   CHK_FAIL_END
 376
 377   CHK_FAIL_START
 378   p = stpcpy (buf + 9, str2);
 379   CHK_FAIL_END
 380
 381   CHK_FAIL_START
 382   strncpy (buf + 7, "X", 4);
 383   CHK_FAIL_END
 384
 385   CHK_FAIL_START
 386   strncpy (buf + 7, "X", l0 + 4);
 387   CHK_FAIL_END
 388
 389   CHK_FAIL_START
 390   stpncpy (buf + 6, "cd", 5);
 391   CHK_FAIL_END
 392
 393   CHK_FAIL_START
 394   stpncpy (buf + 6, "cd", l0 + 5);
 395   CHK_FAIL_END
 396
 397 # if !defined __cplusplus || defined __va_arg_pack
 398   CHK_FAIL_START
 399   sprintf (buf + 8, "%d", num1);
 400   CHK_FAIL_END
 401
 402   CHK_FAIL_START
 403   snprintf (buf + 8, 3, "%d", num2);
 404   CHK_FAIL_END
 405
 406   CHK_FAIL_START
 407   snprintf (buf + 8, l0 + 3, "%d", num2);
 408   CHK_FAIL_END
 409
 410   CHK_FAIL_START
 411   swprintf (wbuf + 8, 3, L"%d", num1);
 412   CHK_FAIL_END
 413
 414   CHK_FAIL_START
 415   swprintf (wbuf + 8, l0 + 3, L"%d", num1);
 416   CHK_FAIL_END
 417 # endif
 418
 419   memcpy (buf, str1 + 2, 9);
 420   CHK_FAIL_START
 421   strcat (buf, "AB");
 422   CHK_FAIL_END
 423
 424   memcpy (buf, str1 + 3, 8);
 425   CHK_FAIL_START
 426   strncat (buf, "ZYXWV", 3);
 427   CHK_FAIL_END
 428
 429   memcpy (buf, str1 + 3, 8);
 430   CHK_FAIL_START
 431   strncat (buf, "ZYXWV", l0 + 3);
 432   CHK_FAIL_END
 433
 434   CHK_FAIL_START
 435   memcpy (a.buf1 + 1, "abcdefghij", 10);
 436   CHK_FAIL_END
 437
 438   CHK_FAIL_START
 439   memcpy (a.buf1 + 1, "abcdefghij", l0 + 10);
 440   CHK_FAIL_END
 441
 442   CHK_FAIL_START
 443   memmove (a.buf1 + 2, a.buf1 + 1, 9);
 444   CHK_FAIL_END
 445
 446   CHK_FAIL_START
 447   memmove (a.buf1 + 2, a.buf1 + 1, l0 + 9);
 448   CHK_FAIL_END
 449
 450   CHK_FAIL_START
 451   bcopy (a.buf1 + 1, a.buf1 + 2, 9);
 452   CHK_FAIL_END
 453
 454   CHK_FAIL_START
 455   bcopy (a.buf1 + 1, a.buf1 + 2, l0 + 9);
 456   CHK_FAIL_END
 457
 458   CHK_FAIL_START
 459   p = (char *) mempcpy (a.buf1 + 6, "abcde", 5);
 460   CHK_FAIL_END
 461
 462   CHK_FAIL_START
 463   p = (char *) mempcpy (a.buf1 + 6, "abcde", l0 + 5);
 464   CHK_FAIL_END
 465
 466   CHK_FAIL_START
 467   memset (a.buf1 + 9, 'j', 2);
 468   CHK_FAIL_END
 469
 470   CHK_FAIL_START
 471   memset (a.buf1 + 9, 'j', l0 + 2);
 472   CHK_FAIL_END
 473
 474   CHK_FAIL_START
 475   bzero (a.buf1 + 9, 2);
 476   CHK_FAIL_END
 477
 478   CHK_FAIL_START
 479   bzero (a.buf1 + 9, l0 + 2);
 480   CHK_FAIL_END
 481
 482   CHK_FAIL_START
 483   explicit_bzero (a.buf1 + 9, 2);
 484   CHK_FAIL_END
 485
 486   CHK_FAIL_START
 487   explicit_bzero (a.buf1 + 9, l0 + 2);
 488   CHK_FAIL_END
 489
 490 # if __USE_FORTIFY_LEVEL >= 2
 491 #  define O 0
 492 # else
 493 #  define O 1
 494 # endif
 495
 496   CHK_FAIL_START
 497   strcpy (a.buf1 + (O + 4), str1 + 5);
 498   CHK_FAIL_END
 499
 500   CHK_FAIL_START
 501   p = stpcpy (a.buf1 + (O + 8), str2);
 502   CHK_FAIL_END
 503
 504   CHK_FAIL_START
 505   strncpy (a.buf1 + (O + 6), "X", 4);
 506   CHK_FAIL_END
 507
 508   CHK_FAIL_START
 509   strncpy (a.buf1 + (O + 6), "X", l0 + 4);
 510   CHK_FAIL_END
 511
 512 # if !defined __cplusplus || defined __va_arg_pack
 513   CHK_FAIL_START
 514   sprintf (a.buf1 + (O + 7), "%d", num1);
 515   CHK_FAIL_END
 516
 517   CHK_FAIL_START
 518   snprintf (a.buf1 + (O + 7), 3, "%d", num2);
 519   CHK_FAIL_END
 520
 521   CHK_FAIL_START
 522   snprintf (a.buf1 + (O + 7), l0 + 3, "%d", num2);
 523   CHK_FAIL_END
 524 # endif
 525
 526   memcpy (a.buf1, str1 + (3 - O), 8 + O);
 527   CHK_FAIL_START
 528   strcat (a.buf1, "AB");
 529   CHK_FAIL_END
 530
 531   memcpy (a.buf1, str1 + (4 - O), 7 + O);
 532   CHK_FAIL_START
 533   strncat (a.buf1, "ZYXWV", l0 + 3);
 534   CHK_FAIL_END
 535 #endif
 536
 537
 538   /* These ops can be done without runtime checking of object size.  */
 539   wmemcpy (wbuf, L"abcdefghij", 10);
 540   wmemmove (wbuf + 1, wbuf, 9);
 541   if (wmemcmp (wbuf, L"aabcdefghi", 10))
 542     FAIL ();
 543
 544   if (wmempcpy (wbuf + 5, L"abcde", 5) != wbuf + 10
 545       || wmemcmp (wbuf, L"aabcdabcde", 10))
 546     FAIL ();
 547
 548   wmemset (wbuf + 8, L'j', 2);
 549   if (wmemcmp (wbuf, L"aabcdabcjj", 10))
 550     FAIL ();
 551
 552   wcscpy (wbuf + 4, L"EDCBA");
 553   if (wmemcmp (wbuf, L"aabcEDCBA", 10))
 554     FAIL ();
 555
 556   if (wcpcpy (wbuf + 8, L"F") != wbuf + 9 || wmemcmp (wbuf, L"aabcEDCBF", 10))
 557     FAIL ();
 558
 559   wcsncpy (wbuf + 6, L"X", 4);
 560   if (wmemcmp (wbuf, L"aabcEDX\0\0", 10))
 561     FAIL ();
 562
 563   if (swprintf (wbuf + 7, 3, L"%ls", L"987654") >= 0
 564       || wmemcmp (wbuf, L"aabcEDX98", 10))
 565     FAIL ();
 566
 567   if (swprintf (wbuf + 7, 3, L"64") != 2
 568       || wmemcmp (wbuf, L"aabcEDX64", 10))
 569     FAIL ();
 570
 571   /* These ops need runtime checking, but shouldn't __chk_fail.  */
 572   wmemcpy (wbuf, L"abcdefghij", l0 + 10);
 573   wmemmove (wbuf + 1, wbuf, l0 + 9);
 574   if (wmemcmp (wbuf, L"aabcdefghi", 10))
 575     FAIL ();
 576
 577   if (wmempcpy (wbuf + 5, L"abcde", l0 + 5) != wbuf + 10
 578       || wmemcmp (wbuf, L"aabcdabcde", 10))
 579     FAIL ();
 580
 581   wmemset (wbuf + 8, L'j', l0 + 2);
 582   if (wmemcmp (wbuf, L"aabcdabcjj", 10))
 583     FAIL ();
 584
 585   wcscpy (wbuf + 4, wstr1 + 5);
 586   if (wmemcmp (wbuf, L"aabcEDCBA", 10))
 587     FAIL ();
 588
 589   if (wcpcpy (wbuf + 8, wstr2) != wbuf + 9 || wmemcmp (wbuf, L"aabcEDCBF", 10))
 590     FAIL ();
 591
 592   wcsncpy (wbuf + 6, L"X", l0 + 4);
 593   if (wmemcmp (wbuf, L"aabcEDX\0\0", 10))
 594     FAIL ();
 595
 596   if (wcpncpy (wbuf + 5, L"cd", l0 + 5) != wbuf + 7
 597       || wmemcmp (wbuf, L"aabcEcd\0\0", 10))
 598     FAIL ();
 599
 600   if (swprintf (wbuf + 7, 3, L"%d", num2) >= 0
 601       || wmemcmp (wbuf, L"aabcEcd98", 10))
 602     FAIL ();
 603
 604   wbuf[l0 + 8] = L'\0';
 605   wcscat (wbuf, L"A");
 606   if (wmemcmp (wbuf, L"aabcEcd9A", 10))
 607     FAIL ();
 608
 609   wbuf[l0 + 7] = L'\0';
 610   wcsncat (wbuf, L"ZYXWV", l0 + 2);
 611   if (wmemcmp (wbuf, L"aabcEcdZY", 10))
 612     FAIL ();
 613
 614   wmemcpy (wa.buf1, L"abcdefghij", l0 + 10);
 615   wmemmove (wa.buf1 + 1, wa.buf1, l0 + 9);
 616   if (wmemcmp (wa.buf1, L"aabcdefghi", 10))
 617     FAIL ();
 618
 619   if (wmempcpy (wa.buf1 + 5, L"abcde", l0 + 5) != wa.buf1 + 10
 620       || wmemcmp (wa.buf1, L"aabcdabcde", 10))
 621     FAIL ();
 622
 623   wmemset (wa.buf1 + 8, L'j', l0 + 2);
 624   if (wmemcmp (wa.buf1, L"aabcdabcjj", 10))
 625     FAIL ();
 626
 627 #if __USE_FORTIFY_LEVEL < 2
 628   /* The following tests are supposed to crash with -D_FORTIFY_SOURCE=2
 629      and sufficient GCC support, as the string operations overflow
 630      from a.buf1 into a.buf2.  */
 631   wcscpy (wa.buf1 + 4, wstr1 + 5);
 632   if (wmemcmp (wa.buf1, L"aabcEDCBA", 10))
 633     FAIL ();
 634
 635   if (wcpcpy (wa.buf1 + 8, wstr2) != wa.buf1 + 9
 636       || wmemcmp (wa.buf1, L"aabcEDCBF", 10))
 637     FAIL ();
 638
 639   wcsncpy (wa.buf1 + 6, L"X", l0 + 4);
 640   if (wmemcmp (wa.buf1, L"aabcEDX\0\0", 10))
 641     FAIL ();
 642
 643   if (swprintf (wa.buf1 + 7, 3, L"%d", num2) >= 0
 644       || wmemcmp (wa.buf1, L"aabcEDX98", 10))
 645     FAIL ();
 646
 647   wa.buf1[l0 + 8] = L'\0';
 648   wcscat (wa.buf1, L"A");
 649   if (wmemcmp (wa.buf1, L"aabcEDX9A", 10))
 650     FAIL ();
 651
 652   wa.buf1[l0 + 7] = L'\0';
 653   wcsncat (wa.buf1, L"ZYXWV", l0 + 2);
 654   if (wmemcmp (wa.buf1, L"aabcEDXZY", 10))
 655     FAIL ();
 656
 657 #endif
 658
 659 #if __USE_FORTIFY_LEVEL >= 1
 660   /* Now check if all buffer overflows are caught at runtime.
 661      N.B. All tests involving a length parameter need to be done
 662      twice: once with the length a compile-time constant, once without.  */
 663
 664   CHK_FAIL_START
 665   wmemcpy (wbuf + 1, L"abcdefghij", 10);
 666   CHK_FAIL_END
 667
 668   CHK_FAIL_START
 669   wmemcpy (wbuf + 1, L"abcdefghij", l0 + 10);
 670   CHK_FAIL_END
 671
 672   CHK_FAIL_START
 673   wmemcpy (wbuf + 9, L"abcdefghij", 10);
 674   CHK_FAIL_END
 675
 676   CHK_FAIL_START
 677   wmemcpy (wbuf + 9, L"abcdefghij", l0 + 10);
 678   CHK_FAIL_END
 679
 680   CHK_FAIL_START
 681   wmemmove (wbuf + 2, wbuf + 1, 9);
 682   CHK_FAIL_END
 683
 684   CHK_FAIL_START
 685   wmemmove (wbuf + 2, wbuf + 1, l0 + 9);
 686   CHK_FAIL_END
 687
 688   CHK_FAIL_START
 689   wp = wmempcpy (wbuf + 6, L"abcde", 5);
 690   CHK_FAIL_END
 691
 692   CHK_FAIL_START
 693   wp = wmempcpy (wbuf + 6, L"abcde", l0 + 5);
 694   CHK_FAIL_END
 695
 696   CHK_FAIL_START
 697   wmemset (wbuf + 9, L'j', 2);
 698   CHK_FAIL_END
 699
 700   CHK_FAIL_START
 701   wmemset (wbuf + 9, L'j', l0 + 2);
 702   CHK_FAIL_END
 703
 704   CHK_FAIL_START
 705   wcscpy (wbuf + 5, wstr1 + 5);
 706   CHK_FAIL_END
 707
 708   CHK_FAIL_START
 709   wp = wcpcpy (wbuf + 9, wstr2);
 710   CHK_FAIL_END
 711
 712   CHK_FAIL_START
 713   wcsncpy (wbuf + 7, L"X", 4);
 714   CHK_FAIL_END
 715
 716   CHK_FAIL_START
 717   wcsncpy (wbuf + 7, L"X", l0 + 4);
 718   CHK_FAIL_END
 719
 720   CHK_FAIL_START
 721   wcsncpy (wbuf + 9, L"XABCDEFGH", 8);
 722   CHK_FAIL_END
 723
 724   CHK_FAIL_START
 725   wcpncpy (wbuf + 9, L"XABCDEFGH", 8);
 726   CHK_FAIL_END
 727
 728   CHK_FAIL_START
 729   wcpncpy (wbuf + 6, L"cd", 5);
 730   CHK_FAIL_END
 731
 732   CHK_FAIL_START
 733   wcpncpy (wbuf + 6, L"cd", l0 + 5);
 734   CHK_FAIL_END
 735
 736   wmemcpy (wbuf, wstr1 + 2, 9);
 737   CHK_FAIL_START
 738   wcscat (wbuf, L"AB");
 739   CHK_FAIL_END
 740
 741   wmemcpy (wbuf, wstr1 + 3, 8);
 742   CHK_FAIL_START
 743   wcsncat (wbuf, L"ZYXWV", l0 + 3);
 744   CHK_FAIL_END
 745
 746   CHK_FAIL_START
 747   wmemcpy (wa.buf1 + 1, L"abcdefghij", 10);
 748   CHK_FAIL_END
 749
 750   CHK_FAIL_START
 751   wmemcpy (wa.buf1 + 1, L"abcdefghij", l0 + 10);
 752   CHK_FAIL_END
 753
 754   CHK_FAIL_START
 755   wmemmove (wa.buf1 + 2, wa.buf1 + 1, 9);
 756   CHK_FAIL_END
 757
 758   CHK_FAIL_START
 759   wmemmove (wa.buf1 + 2, wa.buf1 + 1, l0 + 9);
 760   CHK_FAIL_END
 761
 762   CHK_FAIL_START
 763   wp = wmempcpy (wa.buf1 + 6, L"abcde", 5);
 764   CHK_FAIL_END
 765
 766   CHK_FAIL_START
 767   wp = wmempcpy (wa.buf1 + 6, L"abcde", l0 + 5);
 768   CHK_FAIL_END
 769
 770   CHK_FAIL_START
 771   wmemset (wa.buf1 + 9, L'j', 2);
 772   CHK_FAIL_END
 773
 774   CHK_FAIL_START
 775   wmemset (wa.buf1 + 9, L'j', l0 + 2);
 776   CHK_FAIL_END
 777
 778 #if __USE_FORTIFY_LEVEL >= 2
 779 # define O 0
 780 #else
 781 # define O 1
 782 #endif
 783
 784   CHK_FAIL_START
 785   wcscpy (wa.buf1 + (O + 4), wstr1 + 5);
 786   CHK_FAIL_END
 787
 788   CHK_FAIL_START
 789   wp = wcpcpy (wa.buf1 + (O + 8), wstr2);
 790   CHK_FAIL_END
 791
 792   CHK_FAIL_START
 793   wcsncpy (wa.buf1 + (O + 6), L"X", 4);
 794   CHK_FAIL_END
 795
 796   CHK_FAIL_START
 797   wcsncpy (wa.buf1 + (O + 6), L"X", l0 + 4);
 798   CHK_FAIL_END
 799
 800   wmemcpy (wa.buf1, wstr1 + (3 - O), 8 + O);
 801   CHK_FAIL_START
 802   wcscat (wa.buf1, L"AB");
 803   CHK_FAIL_END
 804
 805   wmemcpy (wa.buf1, wstr1 + (4 - O), 7 + O);
 806   CHK_FAIL_START
 807   wcsncat (wa.buf1, L"ZYXWV", l0 + 3);
 808   CHK_FAIL_END
 809 #endif
 810
 811
 812   /* Now checks for %n protection.  */
 813
 814   /* Constant literals passed directly are always ok
 815      (even with warnings about possible bugs from GCC).  */
 816   int n1, n2;
 817   if (sprintf (buf, "%s%n%s%n", str2, &n1, str2, &n2) != 2
 818       || n1 != 1 || n2 != 2)
 819     FAIL ();
 820
 821   /* In this case the format string is not known at compile time,
 822      but resides in read-only memory, so is ok.  */
 823   if (snprintf (buf, 4, str3, str2, &n1, str2, &n2) != 2
 824       || n1 != 1 || n2 != 2)
 825     FAIL ();
 826
 827   strcpy (buf2 + 2, "%n%s%n");
 828   /* When the format string is writable and contains %n,
 829      with -D_FORTIFY_SOURCE=2 it causes __chk_fail.  */
 830   CHK_FAIL2_START
 831   if (sprintf (buf, buf2, str2, &n1, str2, &n1) != 2)
 832     FAIL ();
 833   CHK_FAIL2_END
 834
 835   CHK_FAIL2_START
 836   if (snprintf (buf, 3, buf2, str2, &n1, str2, &n1) != 2)
 837     FAIL ();
 838   CHK_FAIL2_END
 839
 840   /* But if there is no %n, even writable format string
 841      should work.  */
 842   buf2[6] = '\0';
 843   if (sprintf (buf, buf2 + 4, str2) != 1)
 844     FAIL ();
 845
 846   /* Constant literals passed directly are always ok
 847      (even with warnings about possible bugs from GCC).  */
 848   if (printf ("%s%n%s%n", str4, &n1, str5, &n2) != 14
 849       || n1 != 7 || n2 != 14)
 850     FAIL ();
 851
 852   /* In this case the format string is not known at compile time,
 853      but resides in read-only memory, so is ok.  */
 854   if (printf (str3, str4, &n1, str5, &n2) != 14
 855       || n1 != 7 || n2 != 14)
 856     FAIL ();
 857
 858   strcpy (buf2 + 2, "%n%s%n");
 859   /* When the format string is writable and contains %n,
 860      with -D_FORTIFY_SOURCE=2 it causes __chk_fail.  */
 861   CHK_FAIL2_START
 862   if (printf (buf2, str4, &n1, str5, &n1) != 14)
 863     FAIL ();
 864   CHK_FAIL2_END
 865
 866   /* But if there is no %n, even writable format string
 867      should work.  */
 868   buf2[6] = '\0';
 869   if (printf (buf2 + 4, str5) != 7)
 870     FAIL ();
 871
 872   FILE *fp = stdout;
 873
 874   /* Constant literals passed directly are always ok
 875      (even with warnings about possible bugs from GCC).  */
 876   if (fprintf (fp, "%s%n%s%n", str4, &n1, str5, &n2) != 14
 877       || n1 != 7 || n2 != 14)
 878     FAIL ();
 879
 880   /* In this case the format string is not known at compile time,
 881      but resides in read-only memory, so is ok.  */
 882   if (fprintf (fp, str3, str4, &n1, str5, &n2) != 14
 883       || n1 != 7 || n2 != 14)
 884     FAIL ();
 885
 886   strcpy (buf2 + 2, "%n%s%n");
 887   /* When the format string is writable and contains %n,
 888      with -D_FORTIFY_SOURCE=2 it causes __chk_fail.  */
 889   CHK_FAIL2_START
 890   if (fprintf (fp, buf2, str4, &n1, str5, &n1) != 14)
 891     FAIL ();
 892   CHK_FAIL2_END
 893
 894   /* But if there is no %n, even writable format string
 895      should work.  */
 896   buf2[6] = '\0';
 897   if (fprintf (fp, buf2 + 4, str5) != 7)
 898     FAIL ();
 899
 900   char *my_ptr = NULL;
 901   strcpy (buf2 + 2, "%n%s%n");
 902   /* When the format string is writable and contains %n,
 903      with -D_FORTIFY_SOURCE=2 it causes __chk_fail.  */
 904   CHK_FAIL2_START
 905   if (asprintf (&my_ptr, buf2, str4, &n1, str5, &n1) != 14)
 906     FAIL ();
 907   else
 908     free (my_ptr);
 909   CHK_FAIL2_END
 910
 911   struct obstack obs;
 912   obstack_init (&obs);
 913   CHK_FAIL2_START
 914   if (obstack_printf (&obs, buf2, str4, &n1, str5, &n1) != 14)
 915     FAIL ();
 916   CHK_FAIL2_END
 917   obstack_free (&obs, NULL);
 918
 919   my_ptr = NULL;
 920   if (asprintf (&my_ptr, "%s%n%s%n", str4, &n1, str5, &n1) != 14)
 921     FAIL ();
 922   else
 923     free (my_ptr);
 924
 925   obstack_init (&obs);
 926   if (obstack_printf (&obs, "%s%n%s%n", str4, &n1, str5, &n1) != 14)
 927     FAIL ();
 928   obstack_free (&obs, NULL);
 929
 930   if (freopen (temp_filename, "r", stdin) == NULL)
 931     {
 932       puts ("could not open temporary file");
 933       exit (1);
 934     }
 935
 936   if (gets (buf) != buf || memcmp (buf, "abcdefgh", 9))
 937     FAIL ();
 938   if (gets (buf) != buf || memcmp (buf, "ABCDEFGHI", 10))
 939     FAIL ();
 940
 941 #if __USE_FORTIFY_LEVEL >= 1
 942   CHK_FAIL_START
 943   if (gets (buf) != buf)
 944     FAIL ();
 945   CHK_FAIL_END
 946 #endif
 947
 948   rewind (stdin);
 949
 950   if (fgets (buf, sizeof (buf), stdin) != buf
 951       || memcmp (buf, "abcdefgh\n", 10))
 952     FAIL ();
 953   if (fgets (buf, sizeof (buf), stdin) != buf || memcmp (buf, "ABCDEFGHI", 10))
 954     FAIL ();
 955
 956   rewind (stdin);
 957
 958   if (fgets (buf, l0 + sizeof (buf), stdin) != buf
 959       || memcmp (buf, "abcdefgh\n", 10))
 960     FAIL ();
 961
 962 #if __USE_FORTIFY_LEVEL >= 1
 963   CHK_FAIL_START
 964   if (fgets (buf, sizeof (buf) + 1, stdin) != buf)
 965     FAIL ();
 966   CHK_FAIL_END
 967
 968   CHK_FAIL_START
 969   if (fgets (buf, l0 + sizeof (buf) + 1, stdin) != buf)
 970     FAIL ();
 971   CHK_FAIL_END
 972 #endif
 973
 974   rewind (stdin);
 975
 976   if (fgets_unlocked (buf, sizeof (buf), stdin) != buf
 977       || memcmp (buf, "abcdefgh\n", 10))
 978     FAIL ();
 979   if (fgets_unlocked (buf, sizeof (buf), stdin) != buf
 980       || memcmp (buf, "ABCDEFGHI", 10))
 981     FAIL ();
 982
 983   rewind (stdin);
 984
 985   if (fgets_unlocked (buf, l0 + sizeof (buf), stdin) != buf
 986       || memcmp (buf, "abcdefgh\n", 10))
 987     FAIL ();
 988
 989 #if __USE_FORTIFY_LEVEL >= 1
 990   CHK_FAIL_START
 991   if (fgets_unlocked (buf, sizeof (buf) + 1, stdin) != buf)
 992     FAIL ();
 993   CHK_FAIL_END
 994
 995   CHK_FAIL_START
 996   if (fgets_unlocked (buf, l0 + sizeof (buf) + 1, stdin) != buf)
 997     FAIL ();
 998   CHK_FAIL_END
 999 #endif
1000
1001   rewind (stdin);
1002
1003   if (fread (buf, 1, sizeof (buf), stdin) != sizeof (buf)
1004       || memcmp (buf, "abcdefgh\nA", 10))
1005     FAIL ();
1006   if (fread (buf, sizeof (buf), 1, stdin) != 1
1007       || memcmp (buf, "BCDEFGHI\na", 10))
1008     FAIL ();
1009
1010   rewind (stdin);
1011
1012   if (fread (buf, l0 + 1, sizeof (buf), stdin) != sizeof (buf)
1013       || memcmp (buf, "abcdefgh\nA", 10))
1014     FAIL ();
1015   if (fread (buf, sizeof (buf), l0 + 1, stdin) != 1
1016       || memcmp (buf, "BCDEFGHI\na", 10))
1017     FAIL ();
1018
1019 #if __USE_FORTIFY_LEVEL >= 1
1020   CHK_FAIL_START
1021   if (fread (buf, 1, sizeof (buf) + 1, stdin) != sizeof (buf) + 1)
1022     FAIL ();
1023   CHK_FAIL_END
1024
1025   CHK_FAIL_START
1026   if (fread (buf, sizeof (buf) + 1, l0 + 1, stdin) != 1)
1027     FAIL ();
1028   CHK_FAIL_END
1029 #endif
1030
1031   rewind (stdin);
1032
1033   if (fread_unlocked (buf, 1, sizeof (buf), stdin) != sizeof (buf)
1034       || memcmp (buf, "abcdefgh\nA", 10))
1035     FAIL ();
1036   if (fread_unlocked (buf, sizeof (buf), 1, stdin) != 1
1037       || memcmp (buf, "BCDEFGHI\na", 10))
1038     FAIL ();
1039
1040   rewind (stdin);
1041
1042   if (fread_unlocked (buf, 1, 4, stdin) != 4
1043       || memcmp (buf, "abcdFGHI\na", 10))
1044     FAIL ();
1045   if (fread_unlocked (buf, 4, 1, stdin) != 1
1046       || memcmp (buf, "efghFGHI\na", 10))
1047     FAIL ();
1048
1049   rewind (stdin);
1050
1051   if (fread_unlocked (buf, l0 + 1, sizeof (buf), stdin) != sizeof (buf)
1052       || memcmp (buf, "abcdefgh\nA", 10))
1053     FAIL ();
1054   if (fread_unlocked (buf, sizeof (buf), l0 + 1, stdin) != 1
1055       || memcmp (buf, "BCDEFGHI\na", 10))
1056     FAIL ();
1057
1058 #if __USE_FORTIFY_LEVEL >= 1
1059   CHK_FAIL_START
1060   if (fread_unlocked (buf, 1, sizeof (buf) + 1, stdin) != sizeof (buf) + 1)
1061     FAIL ();
1062   CHK_FAIL_END
1063
1064   CHK_FAIL_START
1065   if (fread_unlocked (buf, sizeof (buf) + 1, l0 + 1, stdin) != 1)
1066     FAIL ();
1067   CHK_FAIL_END
1068 #endif
1069
1070   lseek (fileno (stdin), 0, SEEK_SET);
1071
1072   if (read (fileno (stdin), buf, sizeof (buf) - 1) != sizeof (buf) - 1
1073       || memcmp (buf, "abcdefgh\n", 9))
1074     FAIL ();
1075   if (read (fileno (stdin), buf, sizeof (buf) - 1) != sizeof (buf) - 1
1076       || memcmp (buf, "ABCDEFGHI", 9))
1077     FAIL ();
1078
1079   lseek (fileno (stdin), 0, SEEK_SET);
1080
1081   if (read (fileno (stdin), buf, l0 + sizeof (buf) - 1) != sizeof (buf) - 1
1082       || memcmp (buf, "abcdefgh\n", 9))
1083     FAIL ();
1084
1085 #if __USE_FORTIFY_LEVEL >= 1
1086   CHK_FAIL_START
1087   if (read (fileno (stdin), buf, sizeof (buf) + 1) != sizeof (buf) + 1)
1088     FAIL ();
1089   CHK_FAIL_END
1090
1091   CHK_FAIL_START
1092   if (read (fileno (stdin), buf, l0 + sizeof (buf) + 1) != sizeof (buf) + 1)
1093     FAIL ();
1094   CHK_FAIL_END
1095 #endif
1096
1097   if (pread (fileno (stdin), buf, sizeof (buf) - 1, sizeof (buf) - 2)
1098       != sizeof (buf) - 1
1099       || memcmp (buf, "\nABCDEFGH", 9))
1100     FAIL ();
1101   if (pread (fileno (stdin), buf, sizeof (buf) - 1, 0) != sizeof (buf) - 1
1102       || memcmp (buf, "abcdefgh\n", 9))
1103     FAIL ();
1104   if (pread (fileno (stdin), buf, l0 + sizeof (buf) - 1, sizeof (buf) - 3)
1105       != sizeof (buf) - 1
1106       || memcmp (buf, "h\nABCDEFG", 9))
1107     FAIL ();
1108
1109 #if __USE_FORTIFY_LEVEL >= 1
1110   CHK_FAIL_START
1111   if (pread (fileno (stdin), buf, sizeof (buf) + 1, 2 * sizeof (buf))
1112       != sizeof (buf) + 1)
1113     FAIL ();
1114   CHK_FAIL_END
1115
1116   CHK_FAIL_START
1117   if (pread (fileno (stdin), buf, l0 + sizeof (buf) + 1, 2 * sizeof (buf))
1118       != sizeof (buf) + 1)
1119     FAIL ();
1120   CHK_FAIL_END
1121 #endif
1122
1123   if (pread64 (fileno (stdin), buf, sizeof (buf) - 1, sizeof (buf) - 2)
1124       != sizeof (buf) - 1
1125       || memcmp (buf, "\nABCDEFGH", 9))
1126     FAIL ();
1127   if (pread64 (fileno (stdin), buf, sizeof (buf) - 1, 0) != sizeof (buf) - 1
1128       || memcmp (buf, "abcdefgh\n", 9))
1129     FAIL ();
1130   if (pread64 (fileno (stdin), buf, l0 + sizeof (buf) - 1, sizeof (buf) - 3)
1131       != sizeof (buf) - 1
1132       || memcmp (buf, "h\nABCDEFG", 9))
1133     FAIL ();
1134
1135 #if __USE_FORTIFY_LEVEL >= 1
1136   CHK_FAIL_START
1137   if (pread64 (fileno (stdin), buf, sizeof (buf) + 1, 2 * sizeof (buf))
1138       != sizeof (buf) + 1)
1139     FAIL ();
1140   CHK_FAIL_END
1141
1142   CHK_FAIL_START
1143   if (pread64 (fileno (stdin), buf, l0 + sizeof (buf) + 1, 2 * sizeof (buf))
1144       != sizeof (buf) + 1)
1145     FAIL ();
1146   CHK_FAIL_END
1147 #endif
1148
1149   if (freopen (temp_filename, "r", stdin) == NULL)
1150     {
1151       puts ("could not open temporary file");
1152       exit (1);
1153     }
1154
1155   if (fseek (stdin, 9 + 10 + 11, SEEK_SET))
1156     {
1157       puts ("could not seek in test file");
1158       exit (1);
1159     }
1160
1161 #if __USE_FORTIFY_LEVEL >= 1
1162   CHK_FAIL_START
1163   if (gets (buf) != buf)
1164     FAIL ();
1165   CHK_FAIL_END
1166 #endif
1167
1168   /* Check whether missing N$ formats are detected.  */
1169   CHK_FAIL2_START
1170   printf ("%3$d\n", 1, 2, 3, 4);
1171   CHK_FAIL2_END
1172
1173   CHK_FAIL2_START
1174   fprintf (stdout, "%3$d\n", 1, 2, 3, 4);
1175   CHK_FAIL2_END
1176
1177   CHK_FAIL2_START
1178   sprintf (buf, "%3$d\n", 1, 2, 3, 4);
1179   CHK_FAIL2_END
1180
1181   CHK_FAIL2_START
1182   snprintf (buf, sizeof (buf), "%3$d\n", 1, 2, 3, 4);
1183   CHK_FAIL2_END
1184
1185   int sp[2];
1186   if (socketpair (PF_UNIX, SOCK_STREAM, 0, sp))
1187     FAIL ();
1188   else
1189     {
1190       const char *sendstr = "abcdefgh\nABCDEFGH\n0123456789\n";
1191       if ((size_t) send (sp[0], sendstr, strlen (sendstr), 0)
1192           != strlen (sendstr))
1193         FAIL ();
1194
1195       char recvbuf[12];
1196       if (recv (sp[1], recvbuf, sizeof recvbuf, MSG_PEEK)
1197           != sizeof recvbuf
1198           || memcmp (recvbuf, sendstr, sizeof recvbuf) != 0)
1199         FAIL ();
1200
1201       if (recv (sp[1], recvbuf + 6, l0 + sizeof recvbuf - 7, MSG_PEEK)
1202           != sizeof recvbuf - 7
1203           || memcmp (recvbuf + 6, sendstr, sizeof recvbuf - 7) != 0)
1204         FAIL ();
1205
1206 #if __USE_FORTIFY_LEVEL >= 1
1207       CHK_FAIL_START
1208       if (recv (sp[1], recvbuf + 1, sizeof recvbuf, MSG_PEEK)
1209           != sizeof recvbuf)
1210         FAIL ();
1211       CHK_FAIL_END
1212
1213       CHK_FAIL_START
1214       if (recv (sp[1], recvbuf + 4, l0 + sizeof recvbuf - 3, MSG_PEEK)
1215           != sizeof recvbuf - 3)
1216         FAIL ();
1217       CHK_FAIL_END
1218 #endif
1219
1220       socklen_t sl;
1221       struct sockaddr_un sa_un;
1222
1223       sl = sizeof (sa_un);
1224       if (recvfrom (sp[1], recvbuf, sizeof recvbuf, MSG_PEEK,
1225                     (struct sockaddr *) &sa_un, &sl)
1226           != sizeof recvbuf
1227           || memcmp (recvbuf, sendstr, sizeof recvbuf) != 0)
1228         FAIL ();
1229
1230       sl = sizeof (sa_un);
1231       if (recvfrom (sp[1], recvbuf + 6, l0 + sizeof recvbuf - 7, MSG_PEEK,
1232                     (struct sockaddr *) &sa_un, &sl) != sizeof recvbuf - 7
1233           || memcmp (recvbuf + 6, sendstr, sizeof recvbuf - 7) != 0)
1234         FAIL ();
1235
1236 #if __USE_FORTIFY_LEVEL >= 1
1237       CHK_FAIL_START
1238       sl = sizeof (sa_un);
1239       if (recvfrom (sp[1], recvbuf + 1, sizeof recvbuf, MSG_PEEK,
1240                     (struct sockaddr *) &sa_un, &sl) != sizeof recvbuf)
1241         FAIL ();
1242       CHK_FAIL_END
1243
1244       CHK_FAIL_START
1245       sl = sizeof (sa_un);
1246       if (recvfrom (sp[1], recvbuf + 4, l0 + sizeof recvbuf - 3, MSG_PEEK,
1247                     (struct sockaddr *) &sa_un, &sl) != sizeof recvbuf - 3)
1248         FAIL ();
1249       CHK_FAIL_END
1250 #endif
1251
1252       close (sp[0]);
1253       close (sp[1]);
1254     }
1255
1256   char fname[] = "/tmp/tst-chk1-dir-XXXXXX\0foo";
1257   char *enddir = strchr (fname, '\0');
1258   if (mkdtemp (fname) == NULL)
1259     {
1260       printf ("mkdtemp failed: %m\n");
1261       return 1;
1262     }
1263   *enddir = '/';
1264   if (symlink ("bar", fname) != 0)
1265     FAIL ();
1266
1267   char readlinkbuf[4];
1268   if (readlink (fname, readlinkbuf, 4) != 3
1269       || memcmp (readlinkbuf, "bar", 3) != 0)
1270     FAIL ();
1271   if (readlink (fname, readlinkbuf + 1, l0 + 3) != 3
1272       || memcmp (readlinkbuf, "bbar", 4) != 0)
1273     FAIL ();
1274
1275 #if __USE_FORTIFY_LEVEL >= 1
1276   CHK_FAIL_START
1277   if (readlink (fname, readlinkbuf + 2, l0 + 3) != 3)
1278     FAIL ();
1279   CHK_FAIL_END
1280
1281   CHK_FAIL_START
1282   if (readlink (fname, readlinkbuf + 3, 4) != 3)
1283     FAIL ();
1284   CHK_FAIL_END
1285 #endif
1286
1287   int tmpfd = open ("/tmp", O_RDONLY | O_DIRECTORY);
1288   if (tmpfd < 0)
1289     FAIL ();
1290
1291   if (readlinkat (tmpfd, fname + sizeof ("/tmp/") - 1, readlinkbuf, 4) != 3
1292       || memcmp (readlinkbuf, "bar", 3) != 0)
1293     FAIL ();
1294   if (readlinkat (tmpfd, fname + sizeof ("/tmp/") - 1, readlinkbuf + 1,
1295                   l0 + 3) != 3
1296       || memcmp (readlinkbuf, "bbar", 4) != 0)
1297     FAIL ();
1298
1299 #if __USE_FORTIFY_LEVEL >= 1
1300   CHK_FAIL_START
1301   if (readlinkat (tmpfd, fname + sizeof ("/tmp/") - 1, readlinkbuf + 2,
1302                   l0 + 3) != 3)
1303     FAIL ();
1304   CHK_FAIL_END
1305
1306   CHK_FAIL_START
1307   if (readlinkat (tmpfd, fname + sizeof ("/tmp/") - 1, readlinkbuf + 3,
1308                   4) != 3)
1309     FAIL ();
1310   CHK_FAIL_END
1311 #endif
1312
1313   close (tmpfd);
1314
1315   char *cwd1 = getcwd (NULL, 0);
1316   if (cwd1 == NULL)
1317     FAIL ();
1318
1319   char *cwd2 = getcwd (NULL, 250);
1320   if (cwd2 == NULL)
1321     FAIL ();
1322
1323   if (cwd1 && cwd2)
1324     {
1325       if (strcmp (cwd1, cwd2) != 0)
1326         FAIL ();
1327
1328       *enddir = '\0';
1329       if (chdir (fname))
1330         FAIL ();
1331
1332       char *cwd3 = getcwd (NULL, 0);
1333       if (cwd3 == NULL)
1334         FAIL ();
1335       if (strcmp (fname, cwd3) != 0)
1336         printf ("getcwd after chdir is '%s' != '%s',"
1337                 "get{c,}wd tests skipped\n", cwd3, fname);
1338       else
1339         {
1340           char getcwdbuf[sizeof fname - 3];
1341
1342           char *cwd4 = getcwd (getcwdbuf, sizeof getcwdbuf);
1343           if (cwd4 != getcwdbuf
1344               || strcmp (getcwdbuf, fname) != 0)
1345             FAIL ();
1346
1347           cwd4 = getcwd (getcwdbuf + 1, l0 + sizeof getcwdbuf - 1);
1348           if (cwd4 != getcwdbuf + 1
1349               || getcwdbuf[0] != fname[0]
1350               || strcmp (getcwdbuf + 1, fname) != 0)
1351             FAIL ();
1352
1353 #if __USE_FORTIFY_LEVEL >= 1
1354           CHK_FAIL_START
1355           if (getcwd (getcwdbuf + 2, l0 + sizeof getcwdbuf)
1356               != getcwdbuf + 2)
1357             FAIL ();
1358           CHK_FAIL_END
1359
1360           CHK_FAIL_START
1361           if (getcwd (getcwdbuf + 2, sizeof getcwdbuf)
1362               != getcwdbuf + 2)
1363             FAIL ();
1364           CHK_FAIL_END
1365 #endif
1366
1367           if (getwd (getcwdbuf) != getcwdbuf
1368               || strcmp (getcwdbuf, fname) != 0)
1369             FAIL ();
1370
1371           if (getwd (getcwdbuf + 1) != getcwdbuf + 1
1372               || strcmp (getcwdbuf + 1, fname) != 0)
1373             FAIL ();
1374
1375 #if __USE_FORTIFY_LEVEL >= 1
1376           CHK_FAIL_START
1377           if (getwd (getcwdbuf + 2) != getcwdbuf + 2)
1378             FAIL ();
1379           CHK_FAIL_END
1380 #endif
1381         }
1382
1383       if (chdir (cwd1) != 0)
1384         FAIL ();
1385       free (cwd3);
1386     }
1387
1388   free (cwd1);
1389   free (cwd2);
1390   *enddir = '/';
1391   if (unlink (fname) != 0)
1392     FAIL ();
1393
1394   *enddir = '\0';
1395   if (rmdir (fname) != 0)
1396     FAIL ();
1397
1398
1399 #if PATH_MAX > 0
1400   char largebuf[PATH_MAX];
1401   char *realres = realpath (".", largebuf);
1402   if (realres != largebuf)
1403     FAIL ();
1404
1405 # if __USE_FORTIFY_LEVEL >= 1
1406   CHK_FAIL_START
1407   char realbuf[1];
1408   realres = realpath (".", realbuf);
1409   if (realres != realbuf)
1410     FAIL ();
1411   CHK_FAIL_END
1412 # endif
1413 #endif
1414
1415   if (setlocale (LC_ALL, "de_DE.UTF-8") != NULL)
1416     {
1417       assert (MB_CUR_MAX <= 10);
1418
1419       /* First a simple test.  */
1420       char enough[10];
1421       if (wctomb (enough, L'A') != 1)
1422         FAIL ();
1423
1424 #if __USE_FORTIFY_LEVEL >= 1
1425       /* We know the wchar_t encoding is ISO 10646.  So pick a
1426          character which has a multibyte representation which does not
1427          fit.  */
1428       CHK_FAIL_START
1429       char smallbuf[2];
1430       if (wctomb (smallbuf, L'\x100') != 2)
1431         FAIL ();
1432       CHK_FAIL_END
1433 #endif
1434
1435       mbstate_t s;
1436       memset (&s, '\0', sizeof (s));
1437       if (wcrtomb (enough, L'D', &s) != 1 || enough[0] != 'D')
1438         FAIL ();
1439
1440 #if __USE_FORTIFY_LEVEL >= 1
1441       /* We know the wchar_t encoding is ISO 10646.  So pick a
1442          character which has a multibyte representation which does not
1443          fit.  */
1444       CHK_FAIL_START
1445       char smallbuf[2];
1446       if (wcrtomb (smallbuf, L'\x100', &s) != 2)
1447         FAIL ();
1448       CHK_FAIL_END
1449 #endif
1450
1451       wchar_t wenough[10];
1452       memset (&s, '\0', sizeof (s));
1453       const char *cp = "A";
1454       if (mbsrtowcs (wenough, &cp, 10, &s) != 1
1455           || wcscmp (wenough, L"A") != 0)
1456         FAIL ();
1457
1458       cp = "BC";
1459       if (mbsrtowcs (wenough, &cp, l0 + 10, &s) != 2
1460           || wcscmp (wenough, L"BC") != 0)
1461         FAIL ();
1462
1463 #if __USE_FORTIFY_LEVEL >= 1
1464       CHK_FAIL_START
1465       wchar_t wsmallbuf[2];
1466       cp = "ABC";
1467       mbsrtowcs (wsmallbuf, &cp, 10, &s);
1468       CHK_FAIL_END
1469 #endif
1470
1471       cp = "A";
1472       if (mbstowcs (wenough, cp, 10) != 1
1473           || wcscmp (wenough, L"A") != 0)
1474         FAIL ();
1475
1476       cp = "DEF";
1477       if (mbstowcs (wenough, cp, l0 + 10) != 3
1478           || wcscmp (wenough, L"DEF") != 0)
1479         FAIL ();
1480
1481 #if __USE_FORTIFY_LEVEL >= 1
1482       CHK_FAIL_START
1483       wchar_t wsmallbuf[2];
1484       cp = "ABC";
1485       mbstowcs (wsmallbuf, cp, 10);
1486       CHK_FAIL_END
1487 #endif
1488
1489       memset (&s, '\0', sizeof (s));
1490       cp = "ABC";
1491       wcscpy (wenough, L"DEF");
1492       if (mbsnrtowcs (wenough, &cp, 1, 10, &s) != 1
1493           || wcscmp (wenough, L"AEF") != 0)
1494         FAIL ();
1495
1496       cp = "IJ";
1497       if (mbsnrtowcs (wenough, &cp, 1, l0 + 10, &s) != 1
1498           || wcscmp (wenough, L"IEF") != 0)
1499         FAIL ();
1500
1501 #if __USE_FORTIFY_LEVEL >= 1
1502       CHK_FAIL_START
1503       wchar_t wsmallbuf[2];
1504       cp = "ABC";
1505       mbsnrtowcs (wsmallbuf, &cp, 3, 10, &s);
1506       CHK_FAIL_END
1507 #endif
1508
1509       memset (&s, '\0', sizeof (s));
1510       const wchar_t *wcp = L"A";
1511       if (wcsrtombs (enough, &wcp, 10, &s) != 1
1512           || strcmp (enough, "A") != 0)
1513         FAIL ();
1514
1515       wcp = L"BC";
1516       if (wcsrtombs (enough, &wcp, l0 + 10, &s) != 2
1517           || strcmp (enough, "BC") != 0)
1518         FAIL ();
1519
1520 #if __USE_FORTIFY_LEVEL >= 1
1521       CHK_FAIL_START
1522       char smallbuf[2];
1523       wcp = L"ABC";
1524       wcsrtombs (smallbuf, &wcp, 10, &s);
1525       CHK_FAIL_END
1526 #endif
1527
1528       memset (enough, 'Z', sizeof (enough));
1529       wcp = L"EF";
1530       if (wcstombs (enough, wcp, 10) != 2
1531           || strcmp (enough, "EF") != 0)
1532         FAIL ();
1533
1534       wcp = L"G";
1535       if (wcstombs (enough, wcp, l0 + 10) != 1
1536           || strcmp (enough, "G") != 0)
1537         FAIL ();
1538
1539 #if __USE_FORTIFY_LEVEL >= 1
1540       CHK_FAIL_START
1541       char smallbuf[2];
1542       wcp = L"ABC";
1543       wcstombs (smallbuf, wcp, 10);
1544       CHK_FAIL_END
1545 #endif
1546
1547       memset (&s, '\0', sizeof (s));
1548       wcp = L"AB";
1549       if (wcsnrtombs (enough, &wcp, 1, 10, &s) != 1
1550           || strcmp (enough, "A") != 0)
1551         FAIL ();
1552
1553       wcp = L"BCD";
1554       if (wcsnrtombs (enough, &wcp, 1, l0 + 10, &s) != 1
1555           || strcmp (enough, "B") != 0)
1556         FAIL ();
1557
1558 #if __USE_FORTIFY_LEVEL >= 1
1559       CHK_FAIL_START
1560       char smallbuf[2];
1561       wcp = L"ABC";
1562       wcsnrtombs (smallbuf, &wcp, 3, 10, &s);
1563       CHK_FAIL_END
1564 #endif
1565     }
1566   else
1567     {
1568       puts ("cannot set locale");
1569       ret = 1;
1570     }
1571
1572   int fd = posix_openpt (O_RDWR);
1573   if (fd != -1)
1574     {
1575       char enough[1000];
1576       if (ptsname_r (fd, enough, sizeof (enough)) != 0)
1577         FAIL ();
1578
1579 #if __USE_FORTIFY_LEVEL >= 1
1580       CHK_FAIL_START
1581       char smallbuf[2];
1582       if (ptsname_r (fd, smallbuf, sizeof (smallbuf) + 1) == 0)
1583         FAIL ();
1584       CHK_FAIL_END
1585 #endif
1586       close (fd);
1587     }
1588
1589 #if PATH_MAX > 0
1590   confstr (_CS_GNU_LIBC_VERSION, largebuf, sizeof (largebuf));
1591 # if __USE_FORTIFY_LEVEL >= 1
1592   CHK_FAIL_START
1593   char smallbuf[1];
1594   confstr (_CS_GNU_LIBC_VERSION, smallbuf, sizeof (largebuf));
1595   CHK_FAIL_END
1596 # endif
1597 #endif
1598
1599   gid_t grpslarge[5];
1600   int ngr = getgroups (5, grpslarge);
1601   asm volatile ("" : : "r" (ngr));
1602 #if __USE_FORTIFY_LEVEL >= 1
1603   CHK_FAIL_START
1604   char smallbuf[1];
1605   ngr = getgroups (5, (gid_t *) smallbuf);
1606   asm volatile ("" : : "r" (ngr));
1607   CHK_FAIL_END
1608 #endif
1609
1610   fd = open (_PATH_TTY, O_RDONLY);
1611   if (fd != -1)
1612     {
1613       char enough[1000];
1614       if (ttyname_r (fd, enough, sizeof (enough)) != 0)
1615         FAIL ();
1616
1617 #if __USE_FORTIFY_LEVEL >= 1
1618       CHK_FAIL_START
1619       char smallbuf[2];
1620       if (ttyname_r (fd, smallbuf, sizeof (smallbuf) + 1) == 0)
1621         FAIL ();
1622       CHK_FAIL_END
1623 #endif
1624       close (fd);
1625     }
1626
1627   char hostnamelarge[1000];
1628   gethostname (hostnamelarge, sizeof (hostnamelarge));
1629 #if __USE_FORTIFY_LEVEL >= 1
1630   CHK_FAIL_START
1631   char smallbuf[1];
1632   gethostname (smallbuf, sizeof (hostnamelarge));
1633   CHK_FAIL_END
1634 #endif
1635
1636   char loginlarge[1000];
1637   getlogin_r (loginlarge, sizeof (hostnamelarge));
1638 #if __USE_FORTIFY_LEVEL >= 1
1639   CHK_FAIL_START
1640   char smallbuf[1];
1641   getlogin_r (smallbuf, sizeof (loginlarge));
1642   CHK_FAIL_END
1643 #endif
1644
1645   char domainnamelarge[1000];
1646   int res = getdomainname (domainnamelarge, sizeof (domainnamelarge));
1647   asm volatile ("" : : "r" (res));
1648 #if __USE_FORTIFY_LEVEL >= 1
1649   CHK_FAIL_START
1650   char smallbuf[1];
1651   res = getdomainname (smallbuf, sizeof (domainnamelarge));
1652   asm volatile ("" : : "r" (res));
1653   CHK_FAIL_END
1654 #endif
1655
1656   fd_set s;
1657   FD_ZERO (&s);
1658
1659   FD_SET (FD_SETSIZE - 1, &s);
1660 #if __USE_FORTIFY_LEVEL >= 1
1661   CHK_FAIL_START
1662   FD_SET (FD_SETSIZE, &s);
1663   CHK_FAIL_END
1664
1665   CHK_FAIL_START
1666   FD_SET (l0 + FD_SETSIZE, &s);
1667   CHK_FAIL_END
1668 #endif
1669
1670   FD_CLR (FD_SETSIZE - 1, &s);
1671 #if __USE_FORTIFY_LEVEL >= 1
1672   CHK_FAIL_START
1673   FD_CLR (FD_SETSIZE, &s);
1674   CHK_FAIL_END
1675
1676   CHK_FAIL_START
1677   FD_SET (l0 + FD_SETSIZE, &s);
1678   CHK_FAIL_END
1679 #endif
1680
1681   FD_ISSET (FD_SETSIZE - 1, &s);
1682 #if __USE_FORTIFY_LEVEL >= 1
1683   CHK_FAIL_START
1684   FD_ISSET (FD_SETSIZE, &s);
1685   CHK_FAIL_END
1686
1687   CHK_FAIL_START
1688   FD_ISSET (l0 + FD_SETSIZE, &s);
1689   CHK_FAIL_END
1690 #endif
1691
1692   struct pollfd fds[1];
1693   fds[0].fd = STDOUT_FILENO;
1694   fds[0].events = POLLOUT;
1695   poll (fds, 1, 0);
1696 #if __USE_FORTIFY_LEVEL >= 1
1697   CHK_FAIL_START
1698   poll (fds, 2, 0);
1699   CHK_FAIL_END
1700
1701   CHK_FAIL_START
1702   poll (fds, l0 + 2, 0);
1703   CHK_FAIL_END
1704 #endif
1705   ppoll (fds, 1, NULL, NULL);
1706 #if __USE_FORTIFY_LEVEL >= 1
1707   CHK_FAIL_START
1708   ppoll (fds, 2, NULL, NULL);
1709   CHK_FAIL_END
1710
1711   CHK_FAIL_START
1712   ppoll (fds, l0 + 2, NULL, NULL);
1713   CHK_FAIL_END
1714 #endif
1715
1716   return ret;
1717 }