kc3-lang/gnulib/tests/test-freadable.c

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• Hash : 7b089321
  Author :
  Date : 2025-01-01T09:24:36
  

  maint: run 'make update-copyright'
  

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• tests/test-freadable.c

• /* Test of freadable() function.
     Copyright (C) 2007-2025 Free Software Foundation, Inc.
  
     This program is free software: you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
     the Free Software Foundation, either version 3 of the License, or
     (at your option) any later version.
  
     This program is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     GNU General Public License for more details.
  
     You should have received a copy of the GNU General Public License
     along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  
  /* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
  
  #include <config.h>
  
  /* None of the files accessed by this test are large, so disable the
     fseek link warning if we are not using the gnulib fseek module.  */
  #define _GL_NO_LARGE_FILES
  #include "freadable.h"
  
  #include <stdio.h>
  
  #include "macros.h"
  
  #define TESTFILE "t-freadable.tmp"
  
  int
  main ()
  {
    FILE *fp;
  
    /* Create a file with some contents.  */
    fp = fopen (TESTFILE, "w");
    if (fp == NULL)
      goto skip;
    ASSERT (!freadable (fp));
    if (fwrite ("foobarsh", 1, 8, fp) < 8)
      goto skip;
    ASSERT (!freadable (fp));
    if (fclose (fp))
      goto skip;
  
    /* Open it in read-only mode.  */
    fp = fopen (TESTFILE, "r");
    if (fp == NULL)
      goto skip;
    ASSERT (freadable (fp));
    if (fgetc (fp) != 'f')
      goto skip;
    ASSERT (freadable (fp));
    if (fseek (fp, 2, SEEK_CUR))
      goto skip;
    ASSERT (freadable (fp));
    if (fgetc (fp) != 'b')
      goto skip;
    ASSERT (freadable (fp));
    fflush (fp);
    ASSERT (freadable (fp));
    if (fgetc (fp) != 'a')
      goto skip;
    ASSERT (freadable (fp));
    if (fseek (fp, 0, SEEK_END))
      goto skip;
    ASSERT (freadable (fp));
    if (fclose (fp))
      goto skip;
  
    /* Open it in read-write mode.  */
    fp = fopen (TESTFILE, "r+");
    if (fp == NULL)
      goto skip;
    ASSERT (freadable (fp));
    if (fgetc (fp) != 'f')
      goto skip;
    ASSERT (freadable (fp));
    if (fseek (fp, 2, SEEK_CUR))
      goto skip;
    ASSERT (freadable (fp));
    if (fgetc (fp) != 'b')
      goto skip;
    ASSERT (freadable (fp));
    fflush (fp);
    ASSERT (freadable (fp));
    if (fgetc (fp) != 'a')
      goto skip;
    ASSERT (freadable (fp));
    if (fputc ('z', fp) != 'z')
      goto skip;
    ASSERT (freadable (fp));
    if (fseek (fp, 0, SEEK_END))
      goto skip;
    ASSERT (freadable (fp));
    if (fclose (fp))
      goto skip;
  
    /* Open it in append mode.  */
    fp = fopen (TESTFILE, "a");
    if (fp == NULL)
      goto skip;
    ASSERT (!freadable (fp));
    if (fwrite ("bla", 1, 3, fp) < 3)
      goto skip;
    ASSERT (!freadable (fp));
    if (fclose (fp))
      goto skip;
  
    return test_exit_status;
  
   skip:
    if (test_exit_status != EXIT_SUCCESS)
      return test_exit_status;
    fprintf (stderr, "Skipping test: file operations failed.\n");
    return 77;
  }
  

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