1  /* Copyright (C) 1991-2023 Free Software Foundation, Inc.
       2     This file is part of the GNU C Library.
       3  
       4     The GNU C Library is free software; you can redistribute it and/or
       5     modify it under the terms of the GNU Lesser General Public
       6     License as published by the Free Software Foundation; either
       7     version 2.1 of the License, or (at your option) any later version.
       8  
       9     The GNU C Library is distributed in the hope that it will be useful,
      10     but WITHOUT ANY WARRANTY; without even the implied warranty of
      11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      12     Lesser General Public License for more details.
      13  
      14     You should have received a copy of the GNU Lesser General Public
      15     License along with the GNU C Library; if not, see
      16     <https://www.gnu.org/licenses/>.  */
      17  
      18  #include <errno.h>
      19  #include <fcntl.h>
      20  #include <sys/types.h>
      21  #include <unistd.h>
      22  #include <hurd.h>
      23  
      24  /* Truncate FILE_NAME to LENGTH bytes.  */
      25  int
      26  __truncate64 (const char *file_name, off64_t length)
      27  {
      28    error_t err;
      29    file_t file = __file_name_lookup (file_name, O_WRITE, 0);
      30  
      31    if (file == MACH_PORT_NULL)
      32      return -1;
      33  
      34    err = __file_set_size (file, length);
      35    __mach_port_deallocate (__mach_task_self (), file);
      36  
      37    if (err)
      38      return __hurd_fail (err);
      39    return 0;
      40  }
      41  
      42  weak_alias (__truncate64, truncate64)