/*
 *  This file is part of ixemul.library for the Amiga.
 *  Copyright (C) 1991, 1992  Markus M. Wild
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Library General Public
 *  License as published by the Free Software Foundation; either
 *  version 2 of the License, or (at your option) any later version.
 *
 *  This 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
 *  Library General Public License for more details.
 *
 *  You should have received a copy of the GNU Library General Public
 *  License along with this library; if not, write to the Free
 *  Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#define KERNEL
#include "ixemul.h"

#if __GNUC__ != 2
#define alloca __builtin_alloca
#endif

#ifndef ERROR_IS_SOFT_LINK
#define ERROR_IS_SOFT_LINK  233
#endif

#ifndef ACTION_READ_LINK
#define ACTION_READ_LINK 1024
#endif

struct readlink_vec {
  char *buf;
  int bufsize;
};

static int
__readlink_func (struct StandardPacket *sp, struct MsgPort *handler,
                 BPTR parent_lock,
	         BSTR name,
	         struct readlink_vec *rv, int *no_error)
{
  /* this baby uses CSTRings, absolutely unique... */
  unsigned char *np = BTOCPTR (name);
  np[*np + 1] = 0; np++;

  sp->sp_Pkt.dp_Type = ACTION_READ_LINK;
  sp->sp_Pkt.dp_Arg1 = parent_lock;
  sp->sp_Pkt.dp_Arg2 = (long) np;
  sp->sp_Pkt.dp_Arg3 = (long) rv->buf;
  sp->sp_Pkt.dp_Arg4 = rv->bufsize;

  PutPacket (handler, sp);
  __wait_sync_packet (sp);

  *no_error = sp->sp_Pkt.dp_Res1 > 0;

  /* this *can't* be a symlink... */
  return 0;
}

int 
readlink(char *path, char *buf, int bufsiz)
{
  struct readlink_vec rv;
  
  rv.buf = buf;
  rv.bufsize = bufsiz;
  
  return __plock (path, __readlink_func, &rv);
}