Function create_output_file

src/csplit.c:893–925

/* Create the next output file. */

static void
create_output_file (void)
{
  int nfiles = files_created;
  bool fopen_ok;
  int fopen_errno;

  output_filename = make_filename (nfiles);

  if (nfiles == INT_MAX)
    {
      fopen_ok = false;
      fopen_errno = EOVERFLOW;
    }
  else
    {
      /* Create the output file in a critical section, to avoid races.  */
      sigset_t oldset;
      sigprocmask (SIG_BLOCK, &caught_signals, &oldset);
      output_stream = fopen (output_filename, "w");
      fopen_ok = (output_stream != NULL);
      fopen_errno = errno;
      files_created = nfiles + fopen_ok;
      sigprocmask (SIG_SETMASK, &oldset, NULL);
    }

  if (! fopen_ok)
    {
      error (0, fopen_errno, "%s", quotef (output_filename));
      cleanup_fatal ();
    }
  bytes_written = 0;
}

/* If requested, delete all the files we have created.  This function
   must be called only from critical sections.  */