glibc/sysdeps/mach/hurd/flock.c

/* Copyright (C) 1992-2019 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library 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
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, see
   <http://www.gnu.org/licenses/>.  */

#include <errno.h>
#include <sys/file.h>
#include <hurd/fd.h>
#include <hurd/fs.h>

/* Apply or remove an advisory lock, according to OPERATION,
   on the file FD refers to.  */
int
__flock (int fd, int operation)
{
  error_t err;

  if (err = HURD_DPORT_USE (fd, __file_lock (port, operation)))
    return __hurd_dfail (fd, err);

  return 0;
}

weak_alias (__flock, flock)