sysdeps/mach/hurd/read_nocancel.c

   1 /* Copyright (C) 1993-2020 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 <unistd.h>
  20 #include <hurd/fd.h>
  21 #include <not-cancel.h>
  22
  23 /* Read NBYTES into BUF from FD.  Return the number read or -1.  */
  24 ssize_t
  25 __read_nocancel (int fd, void *buf, size_t nbytes)
  26 {
  27   error_t err = HURD_FD_USE (fd, _hurd_fd_read (descriptor, buf, &nbytes, -1));
  28   return err ? __hurd_dfail (fd, err) : nbytes;
  29 }
  30 libc_hidden_weak (__read_nocancel)