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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: wc.c,v 1.17 2015/01/16 06:40:14 deraadt Exp $	*/

/*
 * Copyright (c) 1980, 1987, 1991, 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.
 */

#include <sys/param.h>	/* MAXBSIZE */
#include <sys/stat.h>
#include <sys/file.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <locale.h>
#include <ctype.h>
#include <err.h>
#include <unistd.h>
#include <util.h>

int64_t	tlinect, twordct, tcharct;
int	doline, doword, dochar, humanchar;
int 	rval;
extern char *__progname;

void	print_counts(int64_t, int64_t, int64_t, char *);
void	format_and_print(long long);
void	cnt(char *);

int
main(int argc, char *argv[])
{
	int ch;

	setlocale(LC_ALL, "");

	while ((ch = getopt(argc, argv, "lwchm")) != -1)
		switch(ch) {
		case 'l':
			doline = 1;
			break;
		case 'w':
			doword = 1;
			break;
		case 'c':
		case 'm':
			dochar = 1;
			break;
		case 'h':
			humanchar = 1;
			break;
		case '?':
		default:
			(void)fprintf(stderr,
			    "usage: %s [-c | -m] [-hlw] [file ...]\n",
			    __progname);
			exit(1);
		}
	argv += optind;
	argc -= optind;

	/*
	 * wc is unusual in that its flags are on by default, so,
	 * if you don't get any arguments, you have to turn them
	 * all on.
	 */
	if (!doline && !doword && !dochar)
		doline = doword = dochar = 1;

	if (!*argv) {
		cnt((char *)NULL);
	} else {
		int dototal = (argc > 1);

		do {
			cnt(*argv);
		} while(*++argv);

		if (dototal)
			print_counts(tlinect, twordct, tcharct, "total");
	}

	exit(rval);
}

void
cnt(char *file)
{
	u_char *C;
	short gotsp;
	int len;
	int64_t linect, wordct, charct;
	struct stat sbuf;
	int fd;
	u_char buf[MAXBSIZE];

	linect = wordct = charct = 0;
	if (file) {
		if ((fd = open(file, O_RDONLY, 0)) < 0) {
			warn("%s", file);
			rval = 1;
			return;
		}
	} else  {
		fd = STDIN_FILENO;
	}

	if (!doword) {
		/*
		 * Line counting is split out because it's a lot
		 * faster to get lines than to get words, since
		 * the word count requires some logic.
		 */
		if (doline) {
			while ((len = read(fd, buf, MAXBSIZE)) > 0) {
				charct += len;
				for (C = buf; len--; ++C)
					if (*C == '\n')
						++linect;
			}
			if (len == -1) {
				warn("%s", file);
				rval = 1;
			}
		}
		/*
		 * If all we need is the number of characters and
		 * it's a directory or a regular or linked file, just
		 * stat the puppy.  We avoid testing for it not being
		 * a special device in case someone adds a new type
		 * of inode.
		 */
		else if (dochar) {
			mode_t ifmt;

			if (fstat(fd, &sbuf)) {
				warn("%s", file);
				rval = 1;
			} else {
				ifmt = sbuf.st_mode & S_IFMT;
				if (ifmt == S_IFREG || ifmt == S_IFLNK
				    || ifmt == S_IFDIR) {
					charct = sbuf.st_size;
				} else {
					while ((len = read(fd, buf, MAXBSIZE)) > 0)
						charct += len;
					if (len == -1) {
						warn("%s", file);
						rval = 1;
					}
				}
			}
		}
	} else {
		/* Do it the hard way... */
		gotsp = 1;
		while ((len = read(fd, buf, MAXBSIZE)) > 0) {
			/*
			 * This loses in the presence of multi-byte characters.
			 * To do it right would require a function to return a
			 * character while knowing how many bytes it consumed.
			 */
			charct += len;
			for (C = buf; len--; ++C) {
				if (isspace(*C)) {
					gotsp = 1;
					if (*C == '\n')
						++linect;
				} else {
					/*
					 * This line implements the POSIX
					 * spec, i.e. a word is a "maximal
					 * string of characters delimited by
					 * whitespace."  Notice nothing was
					 * said about a character being
					 * printing or non-printing.
					 */
					if (gotsp) {
						gotsp = 0;
						++wordct;
					}
				}
			}
		}
		if (len == -1) {
			warn("%s", file);
			rval = 1;
		}
	}

	print_counts(linect, wordct, charct, file);

	/*
	 * Don't bother checking doline, doword, or dochar -- speeds
	 * up the common case
	 */
	tlinect += linect;
	twordct += wordct;
	tcharct += charct;

	if (close(fd) != 0) {
		warn("%s", file);
		rval = 1;
	}
}

void 
format_and_print(long long v)
{
	if (humanchar) {
		char result[FMT_SCALED_STRSIZE];

		(void)fmt_scaled(v, result);
		(void)printf("%7s", result);
	} else {
		(void)printf(" %7lld", v);
	}
}

void
print_counts(int64_t lines, int64_t words, int64_t chars, char *name)
{
	if (doline)
		format_and_print((long long)lines);
	if (doword)
		format_and_print((long long)words);
	if (dochar)
		format_and_print((long long)chars);

	if (name)
		(void)printf(" %s\n", name);
	else
		(void)printf("\n");
}