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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: ruserpass.c,v 1.30 2015/01/16 06:40:08 deraadt Exp $	*/
/*	$NetBSD: ruserpass.c,v 1.14 1997/07/20 09:46:01 lukem Exp $	*/

/*
 * Copyright (c) 1985, 1993, 1994
 *	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.
 */

#ifndef SMALL

#include <sys/types.h>
#include <sys/stat.h>

#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include "ftp_var.h"

static	int token(void);
static	FILE *cfile;

#define	DEFAULT	1
#define	LOGIN	2
#define	PASSWD	3
#define	ACCOUNT 4
#define MACDEF  5
#define	ID	10
#define	MACH	11

static char tokval[100];

static struct toktab {
	char *tokstr;
	int tval;
} toktab[]= {
	{ "default",	DEFAULT },
	{ "login",	LOGIN },
	{ "password",	PASSWD },
	{ "passwd",	PASSWD },
	{ "account",	ACCOUNT },
	{ "machine",	MACH },
	{ "macdef",	MACDEF },
	{ NULL,		0 }
};

int
ruserpass(const char *host, char **aname, char **apass, char **aacct)
{
	char *hdir, buf[PATH_MAX], *tmp;
	char myname[HOST_NAME_MAX+1], *mydomain;
	int t, i, c, usedefault = 0;
	struct stat stb;

	hdir = getenv("HOME");
	if (hdir == NULL || *hdir == '\0')
		return (0);
	i = snprintf(buf, sizeof(buf), "%s/.netrc", hdir);
	if (i < 0 || i >= sizeof(buf)) {
		warnc(ENAMETOOLONG, "%s/.netrc", hdir);
		return (0);
	}
	cfile = fopen(buf, "r");
	if (cfile == NULL) {
		if (errno != ENOENT)
			warn("%s", buf);
		return (0);
	}
	if (gethostname(myname, sizeof(myname)) < 0)
		myname[0] = '\0';
	if ((mydomain = strchr(myname, '.')) == NULL)
		mydomain = "";
next:
	while ((t = token()) > 0) switch(t) {

	case DEFAULT:
		usedefault = 1;
		/* FALLTHROUGH */

	case MACH:
		if (!usedefault) {
			if ((t = token()) == -1)
				goto bad;
			if (t != ID)
				continue;
			/*
			 * Allow match either for user's input host name
			 * or official hostname.  Also allow match of
			 * incompletely-specified host in local domain.
			 */
			if (strcasecmp(host, tokval) == 0)
				goto match;
			if (strcasecmp(hostname, tokval) == 0)
				goto match;
			if ((tmp = strchr(hostname, '.')) != NULL &&
			    strcasecmp(tmp, mydomain) == 0 &&
			    strncasecmp(hostname, tokval,
			    (size_t)(tmp - hostname)) == 0 &&
			    tokval[tmp - hostname] == '\0')
				goto match;
			if ((tmp = strchr(host, '.')) != NULL &&
			    strcasecmp(tmp, mydomain) == 0 &&
			    strncasecmp(host, tokval,
			    (size_t)(tmp - host)) == 0 &&
			    tokval[tmp - host] == '\0')
				goto match;
			continue;
		}
	match:
		while ((t = token()) > 0 &&
		    t != MACH && t != DEFAULT) switch(t) {

		case LOGIN:
			if ((t = token()) == -1)
				goto bad;
			if (t) {
				if (*aname == 0) {
					if ((*aname = strdup(tokval)) == NULL)
						err(1, "strdup");
				} else {
					if (strcmp(*aname, tokval))
						goto next;
				}
			}
			break;
		case PASSWD:
			if ((*aname == NULL || strcmp(*aname, "anonymous")) &&
			    fstat(fileno(cfile), &stb) >= 0 &&
			    (stb.st_mode & 077) != 0) {
	warnx("Error: .netrc file is readable by others.");
	warnx("Remove password or make file unreadable by others.");
				goto bad;
			}
			if ((t = token()) == -1)
				goto bad;
			if (t && *apass == 0) {
				if ((*apass = strdup(tokval)) == NULL)
					err(1, "strdup");
			}
			break;
		case ACCOUNT:
			if (fstat(fileno(cfile), &stb) >= 0
			    && (stb.st_mode & 077) != 0) {
	warnx("Error: .netrc file is readable by others.");
	warnx("Remove account or make file unreadable by others.");
				goto bad;
			}
			if ((t = token()) == -1)
				goto bad;
			if (t && *aacct == 0) {
				if ((*aacct = strdup(tokval)) == NULL)
					err(1, "strdup");
			}
			break;
		case MACDEF:
			if (proxy) {
				(void)fclose(cfile);
				return (0);
			}
			while ((c = fgetc(cfile)) != EOF)
				if (c != ' ' && c != '\t')
					break;
			if (c == EOF || c == '\n') {
				fputs("Missing macdef name argument.\n", ttyout);
				goto bad;
			}
			if (macnum == 16) {
				fputs(
"Limit of 16 macros have already been defined.\n", ttyout);
				goto bad;
			}
			tmp = macros[macnum].mac_name;
			*tmp++ = c;
			for (i=0; i < 8 && (c = fgetc(cfile)) != EOF &&
			    !isspace(c); ++i) {
				*tmp++ = c;
			}
			if (c == EOF) {
				fputs(
"Macro definition missing null line terminator.\n", ttyout);
				goto bad;
			}
			*tmp = '\0';
			if (c != '\n') {
				while ((c = fgetc(cfile)) != EOF && c != '\n');
			}
			if (c == EOF) {
				fputs(
"Macro definition missing null line terminator.\n", ttyout);
				goto bad;
			}
			if (macnum == 0) {
				macros[macnum].mac_start = macbuf;
			}
			else {
				macros[macnum].mac_start =
				    macros[macnum-1].mac_end + 1;
			}
			tmp = macros[macnum].mac_start;
			while (tmp != macbuf + 4096) {
				if ((c = fgetc(cfile)) == EOF) {
				fputs(
"Macro definition missing null line terminator.\n", ttyout);
					goto bad;
				}
				*tmp = c;
				if (*tmp == '\n') {
					if (tmp == macros[macnum].mac_start) {
						macros[macnum++].mac_end = tmp;
						break;
					} else if (*(tmp-1) == '\0') {
						macros[macnum++].mac_end =
						    tmp - 1;
						break;
					}
					*tmp = '\0';
				}
				tmp++;
			}
			if (tmp == macbuf + 4096) {
				fputs("4K macro buffer exceeded.\n", ttyout);
				goto bad;
			}
			break;
		default:
			warnx("Unknown .netrc keyword %s", tokval);
			break;
		}
		goto done;
	}
done:
	if (t == -1)
		goto bad;
	(void)fclose(cfile);
	return (0);
bad:
	(void)fclose(cfile);
	return (-1);
}

static int
token(void)
{
	char *cp;
	int c;
	struct toktab *t;

	if (feof(cfile) || ferror(cfile))
		return (0);
	while ((c = fgetc(cfile)) != EOF &&
	    (c == '\n' || c == '\t' || c == ' ' || c == ','))
		continue;
	if (c == EOF)
		return (0);
	cp = tokval;
	if (c == '"') {
		while ((c = fgetc(cfile)) != EOF && c != '"') {
			if (c == '\\' && (c = fgetc(cfile)) == EOF)
				break;
			*cp++ = c;
			if (cp == tokval + sizeof(tokval)) {
				warnx("Token in .netrc too long");
				return (-1);
			}
		}
	} else {
		*cp++ = c;
		while ((c = fgetc(cfile)) != EOF
		    && c != '\n' && c != '\t' && c != ' ' && c != ',') {
			if (c == '\\' && (c = fgetc(cfile)) == EOF)
				break;
			*cp++ = c;
			if (cp == tokval + sizeof(tokval)) {
				warnx("Token in .netrc too long");
				return (-1);
			}
		}
	}
	*cp = 0;
	if (tokval[0] == 0)
		return (0);
	for (t = toktab; t->tokstr; t++)
		if (!strcmp(t->tokstr, tokval))
			return (t->tval);
	return (ID);
}

#endif /* !SMALL */