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Replace <sys/param.h> with <limits.h> and other less dirty headers where
possible.  Annotate <sys/param.h> lines with their current reasons.  Switch
to PATH_MAX, NGROUPS_MAX, HOST_NAME_MAX+1, LOGIN_NAME_MAX, etc.  Change
MIN() and MAX() to local definitions of MINIMUM() and MAXIMUM() where
sensible to avoid pulling in the pollution.  These are the files confirmed
through binary verification.
ok guenther, millert, doug (helped with the verification protocol)

/*	$OpenBSD: unix.c,v 1.24 2015/01/16 06:40:10 deraadt Exp $	*/
/*	$NetBSD: unix.c,v 1.13 1995/10/03 21:42:48 thorpej Exp $	*/

/*-
 * Copyright (c) 1983, 1988, 1993
 *	The Regents of the University of California.  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.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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.
 */

/*
 * Display protocol blocks in the unix domain.
 */
#include <sys/param.h>	/* MSIZE */
#include <sys/protosw.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/mbuf.h>
#include <sys/sysctl.h>
#include <sys/un.h>
#include <sys/unpcb.h>
#define _KERNEL
#include <sys/ucred.h>
#include <sys/file.h>
#undef _KERNEL

#include <netinet/in.h>

#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <kvm.h>
#include "netstat.h"

static	void unixdomainpr(const struct kinfo_file *, u_long);

void
unixpr(kvm_t *kvmd, u_long pcbaddr)
{
	struct kinfo_file *kf;
	int i, fcnt;

	kf = kvm_getfiles(kvmd, KERN_FILE_BYFILE, 0, sizeof(*kf), &fcnt);
	if (kf == NULL) {
		printf("Out of memory (file table).\n");
		return;
	}
	for (i = 0; i < fcnt; i++) {
		if (kf[i].f_count != 0 && kf[i].f_type == DTYPE_SOCKET &&
		    kf[i].so_family == AF_LOCAL && (kf[i].so_pcb != 0 ||
		    kf[i].unp_path[0] != '\0'))
			unixdomainpr(&kf[i], pcbaddr);
	}
}

static	const char *socktype[] =
    { "#0", "stream", "dgram", "raw", "rdm", "seqpacket" };

static void
unixdomainpr(const struct kinfo_file *kf, u_long pcbaddr)
{
	static int first = 1;

	if (Pflag) {
		if (pcbaddr == kf->f_data)
			socket_dump(pcbaddr);
		return;
	}

	if (first) {
		printf("Active UNIX domain sockets\n");
		printf("%-*.*s %-6.6s %-6.6s %-6.6s %*.*s %*.*s %*.*s %*.*s Addr\n",
		    PLEN, PLEN, "Address", "Type", "Recv-Q", "Send-Q",
		    PLEN, PLEN, "Inode", PLEN, PLEN, "Conn",
		    PLEN, PLEN, "Refs", PLEN, PLEN, "Nextref");
		first = 0;
	}

#define	FAKE_PTR(p)	(PLEN - ((p) ? 0 : 2)), p, ((p) ? "" : "x0")
	printf("%#*llx%s %-6.6s %6llu %6llu %#*llx%s %#*llx%s %#*llx%s %#*llx%s",
	    FAKE_PTR(kf->f_data), socktype[kf->so_type],
	    kf->so_rcv_cc, kf->so_snd_cc,
	    FAKE_PTR(kf->v_un),
	    FAKE_PTR(kf->unp_conn),
	    FAKE_PTR(kf->unp_refs),
	    FAKE_PTR(kf->unp_nextref));
	if (kf->unp_path[0] != '\0')
		printf(" %.*s", KI_UNPPATHLEN, kf->unp_path);
	putchar('\n');
}

/*
 * Dump the contents of a UNIX PCB
 */
void
unpcb_dump(u_long off)
{
	struct unpcb unp;

	if (off == 0)
		return;
	kread(off, &unp, sizeof(unp));

#define	p(fmt, v, sep) printf(#v " " fmt sep, unp.v);
#define	pll(fmt, v, sep) printf(#v " " fmt sep, (long long) unp.v);
#define	pull(fmt, v, sep) printf(#v " " fmt sep, (unsigned long long) unp.v);
#define	pp(fmt, v, sep) printf(#v " " fmt sep, hideroot ? 0 : unp.v);
	printf("unpcb %#lx\n ", hideroot ? 0 : off);
	pp("%p", unp_socket, "\n ");
	pp("%p", unp_vnode, ", ");
	pull("%llu", unp_ino, "\n ");
	pp("%p", unp_conn, ", ");
	pp("%p", unp_refs, ", ");
	pp("%p", unp_nextref, "\n ");
	pp("%p", unp_addr, "\n ");
	p("%#.8x", unp_flags, "\n ");
	p("%u", unp_connid.uid, ", ");
	p("%u", unp_connid.gid, ", ");
	p("%d", unp_connid.pid, "\n ");
	p("%d", unp_cc, ", ");
	p("%d", unp_mbcnt, "\n ");
	pll("%lld", unp_ctime.tv_sec, ", ");
	p("%ld", unp_ctime.tv_nsec, "\n");
#undef p
#undef pp
}