1  /* Read block from given position in file without changing file pointer.
       2     Hurd version.
       3     Copyright (C) 2001-2023 Free Software Foundation, Inc.
       4     This file is part of the GNU C Library.
       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, see
      18     <https://www.gnu.org/licenses/>.  */
      19  
      20  #include <errno.h>
      21  #include <unistd.h>
      22  #include <hurd/fd.h>
      23  #include <not-cancel.h>
      24  
      25  ssize_t
      26  __pread64_nocancel (int fd, void *buf, size_t nbytes, off64_t offset)
      27  {
      28    error_t err;
      29    if (offset < 0)
      30      err = EINVAL;
      31    else
      32      err = HURD_FD_USE (fd, _hurd_fd_read (descriptor, buf, &nbytes, offset));
      33    return err ? __hurd_dfail (fd, err) : nbytes;
      34  }
      35  libc_hidden_weak (__pread64_nocancel)