text: /*
   * Copyright (c) 2007, Kohsuke Ohtani
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   * 3. Neither the name of the author nor the names of any co-contributors
   *    may be used to endorse or promote products derived from this software
   *    without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   * SUCH DAMAGE.
   */
  
  #include <sys/prex.h>
  #include <sys/posix.h>
  #include <ipc/fs.h>
  #include <sys/fcntl.h>
  
  #include <stdarg.h>
  #include <string.h>
  
  int
  fcntl(int fd, int cmd, ...)
  {
  	struct fcntl_msg m;
  	va_list args;
  	long arg;
  
  	va_start(args, cmd);
  	arg = va_arg(args, long);
  	va_end(args);
  
  	m.hdr.code = FS_FCNTL;
  	m.fd = fd;
  	m.cmd = cmd;
  	if (cmd == F_GETLK || cmd == F_SETLK || cmd == F_SETLKW)
  		memcpy(&m.lock, (char *)arg, sizeof(struct flock));
  	else
  		m.arg = arg;
  
  	if (__posix_call(__fs_obj, &m, sizeof(m), 1) != 0)
  		return -1;
  	return m.arg;
  }
  