stdio-common/tst-fseek.c

   1 /* Tests of fseek and fseeko.
   2    Copyright (C) 2000, 2001, 2002 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Ulrich Drepper <drepper@redhat.com>, 2000.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, write to the Free
  18    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  19    02111-1307 USA.  */
  20
  21 #include <error.h>
  22 #include <errno.h>
  23 #include <stdio.h>
  24 #include <stdlib.h>
  25 #include <string.h>
  26 #include <unistd.h>
  27 #include <time.h>
  28 #include <sys/stat.h>
  29
  30
  31 int
  32 main (void)
  33 {
  34   const char *tmpdir;
  35   char *fname;
  36   int fd;
  37   FILE *fp;
  38   const char outstr[] = "hello world!\n";
  39   char strbuf[sizeof outstr];
  40   char buf[200];
  41   struct stat64 st1;
  42   struct stat64 st2;
  43   int result = 0;
  44
  45   tmpdir = getenv ("TMPDIR");
  46   if (tmpdir == NULL || tmpdir[0] == '\0')
  47     tmpdir = "/tmp";
  48
  49   asprintf (&fname, "%s/tst-fseek.XXXXXX", tmpdir);
  50   if (fname == NULL)
  51     error (EXIT_FAILURE, errno, "cannot generate name for temporary file");
  52
  53   /* Create a temporary file.   */
  54   fd = mkstemp (fname);
  55   if (fd == -1)
  56     error (EXIT_FAILURE, errno, "cannot open temporary file");
  57
  58   fp = fdopen (fd, "w+");
  59   if (fp == NULL)
  60     error (EXIT_FAILURE, errno, "cannot get FILE for temporary file");
  61
  62   setbuffer (fp, strbuf, sizeof (outstr) -1);
  63
  64   if (fwrite (outstr, sizeof (outstr) - 1, 1, fp) != 1)
  65     {
  66       printf ("%d: write error\n", __LINE__);
  67       result = 1;
  68       goto out;
  69     }
  70
  71   /* The EOF flag must be reset.  */
  72   if (fgetc (fp) != EOF)
  73     {
  74       printf ("%d: managed to read at end of file\n", __LINE__);
  75       result = 1;
  76     }
  77   else if (! feof (fp))
  78     {
  79       printf ("%d: EOF flag not set\n", __LINE__);
  80       result = 1;
  81     }
  82   if (fseek (fp, 0, SEEK_CUR) != 0)
  83     {
  84       printf ("%d: fseek(fp, 0, SEEK_CUR) failed\n", __LINE__);
  85       result = 1;
  86     }
  87   else if (feof (fp))
  88     {
  89       printf ("%d: fseek() didn't reset EOF flag\n", __LINE__);
  90       result = 1;
  91     }
  92
  93   /* Do the same for fseeko().  */
  94     if (fgetc (fp) != EOF)
  95     {
  96       printf ("%d: managed to read at end of file\n", __LINE__);
  97       result = 1;
  98     }
  99   else if (! feof (fp))
 100     {
 101       printf ("%d: EOF flag not set\n", __LINE__);
 102       result = 1;
 103     }
 104   if (fseeko (fp, 0, SEEK_CUR) != 0)
 105     {
 106       printf ("%d: fseek(fp, 0, SEEK_CUR) failed\n", __LINE__);
 107       result = 1;
 108     }
 109   else if (feof (fp))
 110     {
 111       printf ("%d: fseek() didn't reset EOF flag\n", __LINE__);
 112       result = 1;
 113     }
 114
 115   /* Go back to the beginning of the file: absolute.  */
 116   if (fseek (fp, 0, SEEK_SET) != 0)
 117     {
 118       printf ("%d: fseek(fp, 0, SEEK_SET) failed\n", __LINE__);
 119       result = 1;
 120     }
 121   else if (fflush (fp) != 0)
 122     {
 123       printf ("%d: fflush() failed\n", __LINE__);
 124       result = 1;
 125     }
 126   else if (lseek (fd, 0, SEEK_CUR) != 0)
 127     {
 128       printf ("%d: lseek() returned different position\n", __LINE__);
 129       result = 1;
 130     }
 131   else if (fread (buf, sizeof (outstr) - 1, 1, fp) != 1)
 132     {
 133       printf ("%d: fread() failed\n", __LINE__);
 134       result = 1;
 135     }
 136   else if (memcmp (buf, outstr, sizeof (outstr) - 1) != 0)
 137     {
 138       printf ("%d: content after fseek(,,SEEK_SET) wrong\n", __LINE__);
 139       result = 1;
 140     }
 141
 142   /* Now with fseeko.  */
 143   if (fseeko (fp, 0, SEEK_SET) != 0)
 144     {
 145       printf ("%d: fseeko(fp, 0, SEEK_SET) failed\n", __LINE__);
 146       result = 1;
 147     }
 148   else if (fflush (fp) != 0)
 149     {
 150       printf ("%d: fflush() failed\n", __LINE__);
 151       result = 1;
 152     }
 153   else if (lseek (fd, 0, SEEK_CUR) != 0)
 154     {
 155       printf ("%d: lseek() returned different position\n", __LINE__);
 156       result = 1;
 157     }
 158   else if (fread (buf, sizeof (outstr) - 1, 1, fp) != 1)
 159     {
 160       printf ("%d: fread() failed\n", __LINE__);
 161       result = 1;
 162     }
 163   else if (memcmp (buf, outstr, sizeof (outstr) - 1) != 0)
 164     {
 165       printf ("%d: content after fseeko(,,SEEK_SET) wrong\n", __LINE__);
 166       result = 1;
 167     }
 168
 169   /* Go back to the beginning of the file: relative.  */
 170   if (fseek (fp, -((int) sizeof (outstr) - 1), SEEK_CUR) != 0)
 171     {
 172       printf ("%d: fseek(fp, 0, SEEK_SET) failed\n", __LINE__);
 173       result = 1;
 174     }
 175   else if (fflush (fp) != 0)
 176     {
 177       printf ("%d: fflush() failed\n", __LINE__);
 178       result = 1;
 179     }
 180   else if (lseek (fd, 0, SEEK_CUR) != 0)
 181     {
 182       printf ("%d: lseek() returned different position\n", __LINE__);
 183       result = 1;
 184     }
 185   else if (fread (buf, sizeof (outstr) - 1, 1, fp) != 1)
 186     {
 187       printf ("%d: fread() failed\n", __LINE__);
 188       result = 1;
 189     }
 190   else if (memcmp (buf, outstr, sizeof (outstr) - 1) != 0)
 191     {
 192       printf ("%d: content after fseek(,,SEEK_SET) wrong\n", __LINE__);
 193       result = 1;
 194     }
 195
 196   /* Now with fseeko.  */
 197   if (fseeko (fp, -((int) sizeof (outstr) - 1), SEEK_CUR) != 0)
 198     {
 199       printf ("%d: fseeko(fp, 0, SEEK_SET) failed\n", __LINE__);
 200       result = 1;
 201     }
 202   else if (fflush (fp) != 0)
 203     {
 204       printf ("%d: fflush() failed\n", __LINE__);
 205       result = 1;
 206     }
 207   else if (lseek (fd, 0, SEEK_CUR) != 0)
 208     {
 209       printf ("%d: lseek() returned different position\n", __LINE__);
 210       result = 1;
 211     }
 212   else if (fread (buf, sizeof (outstr) - 1, 1, fp) != 1)
 213     {
 214       printf ("%d: fread() failed\n", __LINE__);
 215       result = 1;
 216     }
 217   else if (memcmp (buf, outstr, sizeof (outstr) - 1) != 0)
 218     {
 219       printf ("%d: content after fseeko(,,SEEK_SET) wrong\n", __LINE__);
 220       result = 1;
 221     }
 222
 223   /* Go back to the beginning of the file: from the end.  */
 224   if (fseek (fp, -((int) sizeof (outstr) - 1), SEEK_END) != 0)
 225     {
 226       printf ("%d: fseek(fp, 0, SEEK_SET) failed\n", __LINE__);
 227       result = 1;
 228     }
 229   else if (fflush (fp) != 0)
 230     {
 231       printf ("%d: fflush() failed\n", __LINE__);
 232       result = 1;
 233     }
 234   else if (lseek (fd, 0, SEEK_CUR) != 0)
 235     {
 236       printf ("%d: lseek() returned different position\n", __LINE__);
 237       result = 1;
 238     }
 239   else if (fread (buf, sizeof (outstr) - 1, 1, fp) != 1)
 240     {
 241       printf ("%d: fread() failed\n", __LINE__);
 242       result = 1;
 243     }
 244   else if (memcmp (buf, outstr, sizeof (outstr) - 1) != 0)
 245     {
 246       printf ("%d: content after fseek(,,SEEK_SET) wrong\n", __LINE__);
 247       result = 1;
 248     }
 249
 250   /* Now with fseeko.  */
 251   if (fseeko (fp, -((int) sizeof (outstr) - 1), SEEK_END) != 0)
 252     {
 253       printf ("%d: fseeko(fp, 0, SEEK_SET) failed\n", __LINE__);
 254       result = 1;
 255     }
 256   else if (fflush (fp) != 0)
 257     {
 258       printf ("%d: fflush() failed\n", __LINE__);
 259       result = 1;
 260     }
 261   else if (lseek (fd, 0, SEEK_CUR) != 0)
 262     {
 263       printf ("%d: lseek() returned different position\n", __LINE__);
 264       result = 1;
 265     }
 266   else if (fread (buf, sizeof (outstr) - 1, 1, fp) != 1)
 267     {
 268       printf ("%d: fread() failed\n", __LINE__);
 269       result = 1;
 270     }
 271   else if (memcmp (buf, outstr, sizeof (outstr) - 1) != 0)
 272     {
 273       printf ("%d: content after fseeko(,,SEEK_SET) wrong\n", __LINE__);
 274       result = 1;
 275     }
 276
 277   if (fwrite (outstr, sizeof (outstr) - 1, 1, fp) != 1)
 278     {
 279       printf ("%d: write error 2\n", __LINE__);
 280       result = 1;
 281       goto out;
 282     }
 283
 284   if (fwrite (outstr, sizeof (outstr) - 1, 1, fp) != 1)
 285     {
 286       printf ("%d: write error 3\n", __LINE__);
 287       result = 1;
 288       goto out;
 289     }
 290
 291   if (fwrite (outstr, sizeof (outstr) - 1, 1, fp) != 1)
 292     {
 293       printf ("%d: write error 4\n", __LINE__);
 294       result = 1;
 295       goto out;
 296     }
 297
 298   if (fwrite (outstr, sizeof (outstr) - 1, 1, fp) != 1)
 299     {
 300       printf ("%d: write error 5\n", __LINE__);
 301       result = 1;
 302       goto out;
 303     }
 304
 305   if (fputc ('1', fp) == EOF || fputc ('2', fp) == EOF)
 306     {
 307       printf ("%d: cannot add characters at the end\n", __LINE__);
 308       result = 1;
 309       goto out;
 310     }
 311
 312   /* Check the access time.  */
 313   if (fstat64 (fd, &st1) < 0)
 314     {
 315       printf ("%d: fstat64() before fseeko() failed\n\n", __LINE__);
 316       result = 1;
 317     }
 318   else
 319     {
 320       sleep (1);
 321
 322       if (fseek (fp, -(2 + 2 * (sizeof (outstr) - 1)), SEEK_CUR) != 0)
 323         {
 324           printf ("%d: fseek() after write characters failed\n", __LINE__);
 325           result = 1;
 326           goto out;
 327         }
 328       else
 329         {
 330
 331           time_t t;
 332           /* Make sure the timestamp actually can be different.  */
 333           sleep (1);
 334           t = time (NULL);
 335
 336           if (fstat64 (fd, &st2) < 0)
 337             {
 338               printf ("%d: fstat64() after fseeko() failed\n\n", __LINE__);
 339               result = 1;
 340             }
 341           if (st1.st_ctime >= t)
 342             {
 343               printf ("%d: st_ctime not updated\n", __LINE__);
 344               result = 1;
 345             }
 346           if (st1.st_mtime >= t)
 347             {
 348               printf ("%d: st_mtime not updated\n", __LINE__);
 349               result = 1;
 350             }
 351           if (st1.st_ctime >= st2.st_ctime)
 352             {
 353               printf ("%d: st_ctime not changed\n", __LINE__);
 354               result = 1;
 355             }
 356           if (st1.st_mtime >= st2.st_mtime)
 357             {
 358               printf ("%d: st_mtime not changed\n", __LINE__);
 359               result = 1;
 360             }
 361         }
 362     }
 363
 364   if (fread (buf, 1, 2 + 2 * (sizeof (outstr) - 1), fp)
 365       != 2 + 2 * (sizeof (outstr) - 1))
 366     {
 367       printf ("%d: reading 2 records plus bits failed\n", __LINE__);
 368       result = 1;
 369     }
 370   else if (memcmp (buf, outstr, sizeof (outstr) - 1) != 0
 371            || memcmp (&buf[sizeof (outstr) - 1], outstr,
 372                       sizeof (outstr) - 1) != 0
 373            || buf[2 * (sizeof (outstr) - 1)] != '1'
 374            || buf[2 * (sizeof (outstr) - 1) + 1] != '2')
 375     {
 376       printf ("%d: reading records failed\n", __LINE__);
 377       result = 1;
 378     }
 379   else if (ungetc ('9', fp) == EOF)
 380     {
 381       printf ("%d: ungetc() failed\n", __LINE__);
 382       result = 1;
 383     }
 384   else if (fseek (fp, -(2 + 2 * (sizeof (outstr) - 1)), SEEK_END) != 0)
 385     {
 386       printf ("%d: fseek after ungetc failed\n", __LINE__);
 387       result = 1;
 388     }
 389   else if (fread (buf, 1, 2 + 2 * (sizeof (outstr) - 1), fp)
 390       != 2 + 2 * (sizeof (outstr) - 1))
 391     {
 392       printf ("%d: reading 2 records plus bits failed\n", __LINE__);
 393       result = 1;
 394     }
 395   else if (memcmp (buf, outstr, sizeof (outstr) - 1) != 0
 396            || memcmp (&buf[sizeof (outstr) - 1], outstr,
 397                       sizeof (outstr) - 1) != 0
 398            || buf[2 * (sizeof (outstr) - 1)] != '1')
 399     {
 400       printf ("%d: reading records for the second time failed\n", __LINE__);
 401       result = 1;
 402     }
 403   else if (buf[2 * (sizeof (outstr) - 1) + 1] == '9')
 404     {
 405       printf ("%d: unget character not ignored\n", __LINE__);
 406       result = 1;
 407     }
 408   else if (buf[2 * (sizeof (outstr) - 1) + 1] != '2')
 409     {
 410       printf ("%d: unget somehow changed character\n", __LINE__);
 411       result = 1;
 412     }
 413
 414   fclose (fp);
 415
 416   fp = fopen (fname, "r");
 417   if (fp == NULL)
 418     {
 419       printf ("%d: fopen() failed\n\n", __LINE__);
 420       result = 1;
 421     }
 422   else if (fstat64 (fileno (fp), &st1) < 0)
 423     {
 424       printf ("%d: fstat64() before fseeko() failed\n\n", __LINE__);
 425       result = 1;
 426     }
 427   else if (fseeko (fp, 0, SEEK_END) != 0)
 428     {
 429       printf ("%d: fseeko(fp, 0, SEEK_END) failed\n", __LINE__);
 430       result = 1;
 431     }
 432   else if (ftello (fp) != st1.st_size)
 433     {
 434       printf ("%d: fstat64 st_size %zd ftello %zd\n", __LINE__,
 435               (size_t) st1.st_size, (size_t) ftello (fp));
 436       result = 1;
 437     }
 438   else
 439     printf ("%d: SEEK_END works\n", __LINE__);
 440   if (fp != NULL)
 441     fclose (fp);
 442
 443   fp = fopen (fname, "r");
 444   if (fp == NULL)
 445     {
 446       printf ("%d: fopen() failed\n\n", __LINE__);
 447       result = 1;
 448     }
 449   else if (fstat64 (fileno (fp), &st1) < 0)
 450     {
 451       printf ("%d: fstat64() before fgetc() failed\n\n", __LINE__);
 452       result = 1;
 453     }
 454   else if (fgetc (fp) == EOF)
 455     {
 456       printf ("%d: fgetc() before fseeko() failed\n\n", __LINE__);
 457       result = 1;
 458     }
 459   else if (fseeko (fp, 0, SEEK_END) != 0)
 460     {
 461       printf ("%d: fseeko(fp, 0, SEEK_END) failed\n", __LINE__);
 462       result = 1;
 463     }
 464   else if (ftello (fp) != st1.st_size)
 465     {
 466       printf ("%d: fstat64 st_size %zd ftello %zd\n", __LINE__,
 467               (size_t) st1.st_size, (size_t) ftello (fp));
 468       result = 1;
 469     }
 470   else
 471     printf ("%d: SEEK_END works\n", __LINE__);
 472   if (fp != NULL)
 473     fclose (fp);
 474
 475  out:
 476   unlink (fname);
 477
 478   return result;
 479 }