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cleanup copyright notices on all files.  I have attempted to be accurate with
the details.  everything is now under Tatu's licence (which I copied from his
readme), and/or the core-sdi bsd-ish thing for deattack, or various openbsd
developers under a 2-term bsd licence.  We're not changing any rules, just
being accurate.

/*
 * Copyright (c) 2000 Markus Friedl.  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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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.
 */
#ifndef HOSTFILE_H
#define HOSTFILE_H

/*
 * Checks whether the given host is already in the list of our known hosts.
 * Returns HOST_OK if the host is known and has the specified key, HOST_NEW
 * if the host is not known, and HOST_CHANGED if the host is known but used
 * to have a different host key.  The host must be in all lowercase.
 */
typedef enum {
	HOST_OK, HOST_NEW, HOST_CHANGED
}       HostStatus;
HostStatus
check_host_in_hostfile(const char *filename, const char *host, Key *key, Key *found);

/*
 * Appends an entry to the host file.  Returns false if the entry could not
 * be appended.
 */
int	add_host_to_hostfile(const char *filename, const char *host, Key *key);

#endif