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This merges in the latest NetBSD sup source.
- removed $Log: ...$ tags to not waste space in the repository
- now doesn't segfault on the alpha!

Note:
To compile sup on systems other than *BSD, you'll need a copy of
vis.c, vis.h, daemon.c, and sys/cdefs.h.  At least the first two
(for OSF/1).

From NetBSD changelog description (for credit where due):
.... 1996/12/23 19:42:05  christos
- add missing prototypes.
- fix function call inconsistencies
- fix int <-> long and pointer conversions
It should run now on 64 bit machines...

....  1996/12/31 18:08:00  christos
64 bit patches (mostly long -> time_t) from Matthew Jacob (?)
sup now works on the alpha!

/*	$OpenBSD: supmsg.c,v 1.4 1997/04/01 07:35:45 todd Exp $	*/

/*
 * Copyright (c) 1992 Carnegie Mellon University
 * All Rights Reserved.
 * 
 * Permission to use, copy, modify and distribute this software and its
 * documentation is hereby granted, provided that both the copyright
 * notice and this permission notice appear in all copies of the
 * software, derivative works or modified versions, and any portions
 * thereof, and that both notices appear in supporting documentation.
 *
 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
 * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
 *
 * Carnegie Mellon requests users of this software to return to
 *
 *  Software Distribution Coordinator  or  Software_Distribution@CS.CMU.EDU
 *  School of Computer Science
 *  Carnegie Mellon University
 *  Pittsburgh PA 15213-3890
 *
 * any improvements or extensions that they make and grant Carnegie Mellon
 * the rights to redistribute these changes.
 */
/*
 **********************************************************************
 * HISTORY
 *
 * 7-July-93  Nate Williams at Montana State University
 *	Modified SUP to use gzip based compression when sending files
 *	across the network to save BandWidth
 * 
 **********************************************************************
 */
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <libc.h>
#include <c.h>
#include "supcdefs.h"
#include "supextern.h"
#define MSGSUBR
#define MSGFILE
#include "supmsg.h"

/*
 * signon message
 */
extern int	pgmver;			/* program version of partner */
extern int	pgmversion;		/* my program version */
extern char	*scmver;		/* scm version of partner */
extern int	fspid;			/* process id of fileserver */

static int refuseone __P((TREE *, void *));
static int listone __P((TREE *, void *));
static int needone __P((TREE *, void *));
static int denyone __P((TREE *, void *));
static int writeone __P((TREE *, void *));

int msgsignon ()
{
	register int x;

	if (server) {
		x = readmsg (MSGSIGNON);
		if (x == SCMOK)  x = readint (&protver);
		if (x == SCMOK)  x = readint (&pgmver);
		if (x == SCMOK)  x = readstring (&scmver);
		if (x == SCMOK)  x = readmend ();
	} else {
		x = writemsg (MSGSIGNON);
		if (x == SCMOK)  x = writeint (PROTOVERSION);
		if (x == SCMOK)  x = writeint (pgmversion);
		if (x == SCMOK)  x = writestring (scmversion);
		if (x == SCMOK)  x = writemend ();
	}
	return (x);
}

int msgsignonack ()
{
	register int x;

	if (server) {
		x = writemsg (MSGSIGNONACK);
		if (x == SCMOK)  x = writeint (PROTOVERSION);
		if (x == SCMOK)  x = writeint (pgmversion);
		if (x == SCMOK)  x = writestring (scmversion);
		if (x == SCMOK)  x = writeint (fspid);
		if (x == SCMOK)  x = writemend ();
	} else {
		x = readmsg (MSGSIGNONACK);
		if (x == SCMOK)  x = readint (&protver);
		if (x == SCMOK)  x = readint (&pgmver);
		if (x == SCMOK)  x = readstring (&scmver);
		if (x == SCMOK)  x = readint (&fspid);
		if (x == SCMOK)  x = readmend ();
	}
	return (x);
}

/*
 * setup message
 */
extern int	xpatch;			/* setup crosspatch to a new client */
extern char	*xuser;			/* user,group,acct for crosspatch */
extern char	*collname;		/* base directory */
extern char	*basedir;		/* base directory */
extern int	basedev;		/* base directory device */
extern int	baseino;		/* base directory inode */
extern time_t	lasttime;		/* time of last upgrade */
extern int	listonly;		/* only listing files, no data xfer */
extern int	newonly;		/* only send new files */
extern char	*release;		/* release name */
extern int	setupack;		/* ack return value for setup */

int msgsetup ()
{
	register int x;

	if (server) {
		x = readmsg (MSGSETUP);
		if (x != SCMOK)  return (x);
		if (protver >= 7) {
			x = readint (&xpatch);
			if (x != SCMOK)  return (x);
		} else
			xpatch = FALSE;
		if (xpatch) {
			x = readstring (&xuser);
			if (x != SCMOK)  return (x);
			return (readmend ());
		}
		x = readstring (&collname);
		if (x == SCMOK)  x = readint ((int *)&lasttime);
		if (x == SCMOK)  x = readstring (&basedir);
		if (x == SCMOK)  x = readint (&basedev);
		if (x == SCMOK)  x = readint (&baseino);
		if (x == SCMOK)  x = readint (&listonly);
		if (x == SCMOK)  x = readint (&newonly);
		if (x == SCMOK)
			if (protver < 6)
				release = (char *)NULL;
			else
				x = readstring (&release);
		if (x == SCMOK)  x = readmend ();
	} else {
		x = writemsg (MSGSETUP);
		if (x != SCMOK)  return (x);
		if (protver >= 7) {
			x = writeint (xpatch);
			if (x != SCMOK)  return (x);
		}
		if (xpatch) {
			x = writestring (xuser);
			if (x != SCMOK)  return (x);
			return (writemend ());
		}
		if (x == SCMOK)  x = writestring (collname);
		if (x == SCMOK)  x = writeint ((int)lasttime);
		if (x == SCMOK)  x = writestring (basedir);
		if (x == SCMOK)  x = writeint (basedev);
		if (x == SCMOK)  x = writeint (baseino);
		if (x == SCMOK)  x = writeint (listonly);
		if (x == SCMOK)  x = writeint (newonly);
		if (x == SCMOK && protver >= 6)  x = writestring (release);
		if (x == SCMOK)  x = writemend ();
	}
	return (x);
}

int msgsetupack ()
{
	if (server)
		return (writemint (MSGSETUPACK,setupack));
	return (readmint (MSGSETUPACK,&setupack));
}

/*
 * crypt test message
 */
extern char	*crypttest;		/* encryption test string */

int msgcrypt ()
{
	if (server)
		return (readmstr (MSGCRYPT,&crypttest));
	return (writemstr (MSGCRYPT,crypttest));
}

int msgcryptok ()
{
	if (server)
		return (writemnull (MSGCRYPTOK));
	return (readmnull (MSGCRYPTOK));
}

/*
 * login message
 */
extern char	*logcrypt;		/* login encryption test */
extern char	*loguser;		/* login username */
extern char	*logpswd;		/* password for login */
extern int	logack;			/* login ack status */
extern char	*logerror;		/* error from login */

int msglogin ()
{
	register int x;
	if (server) {
		x = readmsg (MSGLOGIN);
		if (x == SCMOK)  x = readstring (&logcrypt);
		if (x == SCMOK)  x = readstring (&loguser);
		if (x == SCMOK)  x = readstring (&logpswd);
		if (x == SCMOK)  x = readmend ();
	} else {
		x = writemsg (MSGLOGIN);
		if (x == SCMOK)  x = writestring (logcrypt);
		if (x == SCMOK)  x = writestring (loguser);
		if (x == SCMOK)  x = writestring (logpswd);
		if (x == SCMOK)  x = writemend ();
	}
	return (x);
}

int msglogack ()
{
	register int x;
	if (server) {
		x = writemsg (MSGLOGACK);
		if (x == SCMOK)  x = writeint (logack);
		if (x == SCMOK)  x = writestring (logerror);
		if (x == SCMOK)  x = writemend ();
	} else {
		x = readmsg (MSGLOGACK);
		if (x == SCMOK)  x = readint (&logack);
		if (x == SCMOK)  x = readstring (&logerror);
		if (x == SCMOK)  x = readmend ();
	}
	return (x);
}

/*
 * refuse list message
 */
extern TREE	*refuseT;		/* tree of files to refuse */

static int refuseone (t, v)
register TREE *t;
void *v;
{
	return (writestring (t->Tname));
}

int msgrefuse ()
{
	register int x;
	if (server) {
		char *name;
		x = readmsg (MSGREFUSE);
		if (x == SCMOK)  x = readstring (&name);
		while (x == SCMOK) {
			if (name == NULL)  break;
			(void) Tinsert (&refuseT,name,FALSE);
			free (name);
			x = readstring (&name);
		}
		if (x == SCMOK)  x = readmend ();
	} else {
		x = writemsg (MSGREFUSE);
		if (x == SCMOK)  x = Tprocess (refuseT,refuseone, NULL);
		if (x == SCMOK)  x = writestring ((char *)NULL);
		if (x == SCMOK)  x = writemend ();
	}
	return (x);
}

/*
 * list files message
 */
extern TREE	*listT;			/* tree of files to list */
extern time_t	scantime;		/* time that collection was scanned */

static int listone (t, v)
register TREE *t;
void *v;
{
	register int x;

	x = writestring (t->Tname);
	if (x == SCMOK)  x = writeint ((int)t->Tmode);
	if (x == SCMOK)  x = writeint ((int)t->Tflags);
	if (x == SCMOK)  x = writeint (t->Tmtime);
	return (x);
}

int msglist ()
{
	register int x;
	if (server) {
		x = writemsg (MSGLIST);
		if (x == SCMOK)  x = Tprocess (listT,listone, NULL);
		if (x == SCMOK)  x = writestring ((char *)NULL);
		if (x == SCMOK)  x = writeint ((int)scantime);
		if (x == SCMOK)  x = writemend ();
	} else {
		char *name;
		int mode,flags,mtime;
		register TREE *t;
		x = readmsg (MSGLIST);
		if (x == SCMOK)  x = readstring (&name);
		while (x == SCMOK) {
			if (name == NULL)  break;
			x = readint (&mode);
			if (x == SCMOK)  x = readint (&flags);
			if (x == SCMOK)  x = readint (&mtime);
			if (x != SCMOK)  break;
			t = Tinsert (&listT,name,TRUE);
			free (name);
			t->Tmode = mode;
			t->Tflags = flags;
			t->Tmtime = mtime;
			x = readstring (&name);
		}
		if (x == SCMOK)  x = readint ((int *)&scantime);
		if (x == SCMOK)  x = readmend ();
	}
	return (x);
}

/*
 * files needed message
 */
extern TREE	*needT;			/* tree of files to need */

static int needone (t, v)
register TREE *t;
void *v;
{
	register int x;
	x = writestring (t->Tname);
	if (x == SCMOK)  x = writeint ((t->Tflags&FUPDATE) != 0);
	return (x);
}

int msgneed ()
{
	register int x;
	if (server) {
		char *name;
		int update;
		register TREE *t;
		x = readmsg (MSGNEED);
		if (x == SCMOK)  x = readstring (&name);
		while (x == SCMOK) {
			if (name == NULL)  break;
			x = readint (&update);
			if (x != SCMOK)  break;
			t = Tinsert (&needT,name,TRUE);
			free (name);
			if (update)  t->Tflags |= FUPDATE;
			x = readstring (&name);
		}
		if (x == SCMOK)  x = readmend ();
	} else {
		x = writemsg (MSGNEED);
		if (x == SCMOK)  x = Tprocess (needT,needone, NULL);
		if (x == SCMOK)  x = writestring ((char *)NULL);
		if (x == SCMOK)  x = writemend ();
	}
	return (x);
}

/*
 * files denied message
 */
extern TREE	*denyT;			/* tree of files to deny */

static int denyone (t, v)
register TREE *t;
void *v;
{
	return (writestring (t->Tname));
}

int msgdeny ()
{
	register int x;
	if (server) {
		x = writemsg (MSGDENY);
		if (x == SCMOK)  x = Tprocess (denyT,denyone, NULL);
		if (x == SCMOK)  x = writestring ((char *)NULL);
		if (x == SCMOK)  x = writemend ();
	} else {
		char *name;
		x = readmsg (MSGDENY);
		if (x == SCMOK)  x = readstring (&name);
		while (x == SCMOK) {
			if (name == NULL)  break;
			(void) Tinsert (&denyT,name,FALSE);
			free (name);
			x = readstring (&name);
		}
		if (x == SCMOK)  x = readmend ();
	}
	return (x);
}

/*
 * send file message
 */
int msgsend ()
{
	if (server)
		return (readmnull (MSGSEND));
	return (writemnull (MSGSEND));
}

/*
 * receive file message
 */
extern TREE	*upgradeT;		/* pointer to file being upgraded */

static int writeone (t, v)
register TREE *t;
void *v;
{
	return (writestring (t->Tname));
}


#ifdef __STDC__
int msgrecv (int (*xferfile)(TREE *, va_list),...)
#else
/*VARARGS*//*ARGSUSED*/
int msgrecv (va_alist)
va_dcl
#endif
{
	va_list args;
	register int x;
	register TREE *t = upgradeT;
#ifdef __STDC__
	va_start(args,xferfile);
#else
	int (*xferfile)(TREE *, void *);

	va_start(args);
	xferfile = va_arg(args, int (*)(TREE *, void *));
#endif
	if (server) {
		x = writemsg (MSGRECV);
		if (t == NULL) {
			if (x == SCMOK)  x = writestring ((char *)NULL);
			if (x == SCMOK)  x = writemend ();
			return (x);
		}
		if (x == SCMOK)  x = writestring (t->Tname);
		if (x == SCMOK)  x = writeint (t->Tmode);
		if (t->Tmode == 0) {
			if (x == SCMOK)  x = writemend ();
			return (x);
		}
		if (x == SCMOK)  x = writeint (t->Tflags);
		if (x == SCMOK)  x = writestring (t->Tuser);
		if (x == SCMOK)  x = writestring (t->Tgroup);
		if (x == SCMOK)  x = writeint (t->Tmtime);
		if (x == SCMOK)  x = Tprocess (t->Tlink,writeone, NULL);
		if (x == SCMOK)  x = writestring ((char *)NULL);
		if (x == SCMOK)  x = Tprocess (t->Texec,writeone, NULL);
		if (x == SCMOK)  x = writestring ((char *)NULL);
		if (x == SCMOK)  x = (*xferfile) (t,args);
		if (x == SCMOK)  x = writemend ();
	} else {
		char *linkname,*execcmd;
		if (t == NULL)  return (SCMERR);
		x = readmsg (MSGRECV);
		if (x == SCMOK)  x = readstring (&t->Tname);
		if (x == SCMOK && t->Tname == NULL) {
			x = readmend ();
			if (x == SCMOK)  x = (*xferfile) (NULL,args);
			return (x);
		}
		if (x == SCMOK)  x = readint (&t->Tmode);
		if (t->Tmode == 0) {
			x = readmend ();
			if (x == SCMOK)  x = (*xferfile) (t,args);
			return (x);
		}
		if (x == SCMOK)  x = readint (&t->Tflags);
		if (x == SCMOK)  x = readstring (&t->Tuser);
		if (x == SCMOK)  x = readstring (&t->Tgroup);
		if (x == SCMOK)  x = readint (&t->Tmtime);
		t->Tlink = NULL;
		if (x == SCMOK)  x = readstring (&linkname);
		while (x == SCMOK) {
			if (linkname == NULL)  break;
			(void) Tinsert (&t->Tlink,linkname,FALSE);
			free (linkname);
			x = readstring (&linkname);
		}
		t->Texec = NULL;
		if (x == SCMOK)  x = readstring (&execcmd);
		while (x == SCMOK) {
			if (execcmd == NULL)  break;
			(void) Tinsert (&t->Texec,execcmd,FALSE);
			free (execcmd);
			x = readstring (&execcmd);
		}
		if (x == SCMOK)  x = (*xferfile) (t,args);
		if (x == SCMOK)  x = readmend ();
	}
	va_end(args);
	return (x);
}

/*
 * protocol done message
 */
extern int	doneack;
extern char	*donereason;

int msgdone ()
{
	register int x;

	if (protver < 6) {
		printf ("Error, msgdone should not have been called.");
		return (SCMERR);
	}
	if (server) {
		x = readmsg (MSGDONE);
		if (x == SCMOK)  x = readint (&doneack);
		if (x == SCMOK)  x = readstring (&donereason);
		if (x == SCMOK)  x = readmend ();
	} else {
		x = writemsg (MSGDONE);
		if (x == SCMOK)  x = writeint (doneack);
		if (x == SCMOK)  x = writestring (donereason);
		if (x == SCMOK)  x = writemend ();
	}
	return (x);
}

/*
 * go away message
 */
extern char	*goawayreason;		/* reason for goaway */

int msggoaway ()
{
	return (writemstr (MSGGOAWAY,goawayreason));
}

/*
 * cross-patch protocol message
 */
extern int	xargc;			/* arg count for crosspatch */
extern char	**xargv;		/* arg array for crosspatch */

int msgxpatch ()
{
	register int x;
	register int i;

	if (server) {
		x = readmsg (MSGXPATCH);
		if (x != SCMOK)  return (x);
		x = readint (&xargc);
		if (x != SCMOK)  return (x);
		xargc += 2;
		xargv = (char **)calloc (sizeof (char *),(unsigned)xargc+1);
		if (xargv == NULL)
			return (SCMERR);
		for (i = 2; i < xargc; i++) {
			x = readstring (&xargv[i]);
			if (x != SCMOK)  return (x);
		}
		x = readmend ();
	} else {
		x = writemsg (MSGXPATCH);
		if (x != SCMOK)  return (x);
		x = writeint (xargc);
		if (x != SCMOK)  return (x);
		for (i = 0; i < xargc; i++) {
			x = writestring (xargv[i]);
			if (x != SCMOK)  return (x);
		}
		x = writemend ();
	}
	return (x);
}

/*
 * Compression check protocol message
 */
extern int	docompress;		/* Compress file before sending? */

int msgcompress ()
{
	if (server)
		return (readmint (MSGCOMPRESS,&docompress));
	return (writemint (MSGCOMPRESS, docompress));
}