NetBSD/usr.bin/wc/wc.c

259 lines
5.9 KiB
C

/*
* Copyright (c) 1980, 1987 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. 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 lint
char copyright[] =
"@(#) Copyright (c) 1980, 1987 Regents of the University of California.\n\
All rights reserved.\n";
#endif /* not lint */
#ifndef lint
/*static char sccsid[] = "from: @(#)wc.c 5.7 (Berkeley) 3/2/91";*/
static char rcsid[] = "$Id: wc.c,v 1.9 1994/01/03 03:11:06 andrew Exp $";
#endif /* not lint */
/* wc line, word and char count */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <locale.h>
#include <ctype.h>
#include <errno.h>
#include <sys/param.h>
#include <sys/stat.h>
#include <sys/file.h>
#include <unistd.h>
#include <err.h>
static void print_counts();
static void cnt();
static long tlinect, twordct, tcharct;
static int doline, doword, dochar;
static int rval = 0;
int
main(argc, argv)
int argc;
char **argv;
{
extern int optind;
register int ch;
setlocale(LC_ALL, "");
while ((ch = getopt(argc, argv, "lwcm")) != -1)
switch((char)ch) {
case 'l':
doline = 1;
break;
case 'w':
doword = 1;
break;
case 'c':
case 'm':
dochar = 1;
break;
case '?':
default:
fprintf(stderr, "usage: wc [-c | -m] [-lw] [file ...]\n");
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);
}
static void
cnt(file)
char *file;
{
register u_char *C;
register short gotsp;
register int len;
register long 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) {
int 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) {
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 ? file : "");
/* don't bother checkint doline, doword, or dochar --- speeds
up the common case */
tlinect += linect;
twordct += wordct;
tcharct += charct;
if (close(fd)) {
warn ("%s", file);
rval = 1;
}
}
void
print_counts (lines, words, chars, name)
long lines;
long words;
long chars;
char *name;
{
if (doline)
printf(" %7ld", lines);
if (doword)
printf(" %7ld", words);
if (dochar)
printf(" %7ld", chars);
printf (" %s\n", name);
}