FreeBSD-5.3/usr.bin/wc/wc.c
/*
* 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. 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
static const char copyright[] =
"@(#) Copyright (c) 1980, 1987, 1991, 1993\n\
The Regents of the University of California. All rights reserved.\n";
#endif /* not lint */
#if 0
#ifndef lint
static char sccsid[] = "@(#)wc.c 8.1 (Berkeley) 6/6/93";
#endif /* not lint */
#endif
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/usr.bin/wc/wc.c,v 1.20 2004/04/09 11:17:29 tjr Exp $");
#include <sys/param.h>
#include <sys/stat.h>
#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <locale.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <wchar.h>
#include <wctype.h>
uintmax_t tlinect, twordct, tcharct;
int doline, doword, dochar, domulti;
static int cnt(const char *);
static void usage(void);
int
main(argc, argv)
int argc;
char *argv[];
{
int ch, errors, total;
(void) setlocale(LC_CTYPE, "");
while ((ch = getopt(argc, argv, "clmw")) != -1)
switch((char)ch) {
case 'l':
doline = 1;
break;
case 'w':
doword = 1;
break;
case 'c':
dochar = 1;
domulti = 0;
break;
case 'm':
domulti = 1;
dochar = 0;
break;
case '?':
default:
usage();
}
argv += optind;
argc -= optind;
/* Wc's flags are on by default. */
if (doline + doword + dochar + domulti == 0)
doline = doword = dochar = 1;
errors = 0;
total = 0;
if (!*argv) {
if (cnt((char *)NULL) != 0)
++errors;
else
(void)printf("\n");
}
else do {
if (cnt(*argv) != 0)
++errors;
else
(void)printf(" %s\n", *argv);
++total;
} while(*++argv);
if (total > 1) {
if (doline)
(void)printf(" %7ju", tlinect);
if (doword)
(void)printf(" %7ju", twordct);
if (dochar || domulti)
(void)printf(" %7ju", tcharct);
(void)printf(" total\n");
}
exit(errors == 0 ? 0 : 1);
}
static int
cnt(file)
const char *file;
{
struct stat sb;
uintmax_t linect, wordct, charct;
int fd, len, warned;
size_t clen;
short gotsp;
u_char *p;
u_char buf[MAXBSIZE];
wchar_t wch;
mbstate_t mbs;
linect = wordct = charct = 0;
if (file == NULL) {
file = "stdin";
fd = STDIN_FILENO;
} else {
if ((fd = open(file, O_RDONLY, 0)) < 0) {
warn("%s: open", file);
return (1);
}
if (doword || (domulti && MB_CUR_MAX != 1))
goto word;
/*
* 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))) {
if (len == -1) {
warn("%s: read", file);
(void)close(fd);
return (1);
}
charct += len;
for (p = buf; len--; ++p)
if (*p == '\n')
++linect;
}
tlinect += linect;
(void)printf(" %7ju", linect);
if (dochar) {
tcharct += charct;
(void)printf(" %7ju", charct);
}
(void)close(fd);
return (0);
}
/*
* If all we need is the number of characters and it's a
* regular file, just stat the puppy.
*/
if (dochar || domulti) {
if (fstat(fd, &sb)) {
warn("%s: fstat", file);
(void)close(fd);
return (1);
}
if (S_ISREG(sb.st_mode)) {
(void)printf(" %7lld", (long long)sb.st_size);
tcharct += sb.st_size;
(void)close(fd);
return (0);
}
}
}
/* Do it the hard way... */
word: gotsp = 1;
warned = 0;
memset(&mbs, 0, sizeof(mbs));
while ((len = read(fd, buf, MAXBSIZE)) != 0) {
if (len == -1) {
warn("%s: read", file);
(void)close(fd);
return (1);
}
p = buf;
while (len > 0) {
if (!domulti || MB_CUR_MAX == 1) {
clen = 1;
wch = (unsigned char)*p;
} else if ((clen = mbrtowc(&wch, p, len, &mbs)) ==
(size_t)-1) {
if (!warned) {
errno = EILSEQ;
warn("%s", file);
warned = 1;
}
memset(&mbs, 0, sizeof(mbs));
clen = 1;
wch = (unsigned char)*p;
} else if (clen == (size_t)-2)
break;
else if (clen == 0)
clen = 1;
charct++;
len -= clen;
p += clen;
if (wch == L'\n')
++linect;
if (iswspace(wch))
gotsp = 1;
else if (gotsp) {
gotsp = 0;
++wordct;
}
}
}
if (domulti && MB_CUR_MAX > 1)
if (mbrtowc(NULL, NULL, 0, &mbs) == (size_t)-1 && !warned)
warn("%s", file);
if (doline) {
tlinect += linect;
(void)printf(" %7ju", linect);
}
if (doword) {
twordct += wordct;
(void)printf(" %7ju", wordct);
}
if (dochar || domulti) {
tcharct += charct;
(void)printf(" %7ju", charct);
}
(void)close(fd);
return (0);
}
static void
usage()
{
(void)fprintf(stderr, "usage: wc [-clmw] [file ...]\n");
exit(1);
}