/* Copyright (C) 1995-2018 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/types.h>

#include <sys/ptrace.h>

#include <sys/user.h>

#include <stdarg.h>

#include <signal.h>

#include <sysdep.h>

#include <sys/syscall.h>

long int

ptrace (enum __ptrace_request request, ...)

{

  long int res, ret;

  va_list ap;

  pid_t pid;

  void *addr, *data;

  va_start (ap, request);

  pid = va_arg (ap, pid_t);

  addr = va_arg (ap, void *);

  data = va_arg (ap, void *);

  va_end (ap);

  if (request > 0 && request < 4)

    data = &ret;

  res = INLINE_SYSCALL (ptrace, 4, request, pid, addr, data);

  if (res >= 0 && request > 0 && request < 4)

    {

      __set_errno (0);

      return ret;

    }

  return res;

}