/*      $OpenBSD: privsep.h,v 1.5 2007/02/13 21:54:22 stevesk Exp $ */
/*      $DragonFly: src/sbin/dhclient/privsep.h,v 1.1 2008/08/30 16:07:58 hasso Exp $   */

/*
 * Copyright (c) 2004 Henning Brauer <henning@openbsd.org>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER IN
 * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
 * OF OR IN CONNECTION WITH THE USE, ABUSE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include <sys/types.h>

struct buf {
        u_char                  *buf;
        size_t                   size;
        size_t                   wpos;
        size_t                   rpos;
};

enum imsg_code {
        IMSG_NONE,
        IMSG_SCRIPT_INIT,
        IMSG_SCRIPT_WRITE_PARAMS,
        IMSG_SCRIPT_GO,
        IMSG_SCRIPT_GO_RET
};

struct imsg_hdr {
        enum imsg_code  code;
        size_t          len;
};

struct buf      *buf_open(size_t);
void             buf_add(struct buf *, void *, size_t);
void             buf_close(int, struct buf *);
void             buf_read(int, void *, size_t);
void             dispatch_imsg(int);