File: [local] / src / usr.bin / wc / wc.c (download)
Revision 1.23, Sat Sep 29 16:17:35 2018 UTC (5 years, 8 months ago) by cheloha
Branch: MAIN
Changes since 1.22: +4 -3 lines
Treat NUL like any other byte in the default case; aligns newline count
with that of the '-l' case.
From David Hines on bugs@.
ok millert@
|
/* $OpenBSD: wc.c,v 1.23 2018/09/29 16:17:35 cheloha 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 <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <locale.h>
#include <ctype.h>
#include <err.h>
#include <unistd.h>
#include <util.h>
#include <wchar.h>
#include <wctype.h>
int64_t tlinect, twordct, tcharct;
int doline, doword, dochar, humanchar, multibyte;
int rval;
extern char *__progname;
static void print_counts(int64_t, int64_t, int64_t, char *);
static void format_and_print(int64_t);
static void cnt(char *);
int
main(int argc, char *argv[])
{
int ch;
setlocale(LC_CTYPE, "");
if (pledge("stdio rpath", NULL) == -1)
err(1, "pledge");
while ((ch = getopt(argc, argv, "lwchm")) != -1)
switch(ch) {
case 'l':
doline = 1;
break;
case 'w':
doword = 1;
break;
case 'm':
if (MB_CUR_MAX > 1)
multibyte = 1;
/* FALLTHROUGH */
case 'c':
dochar = 1;
break;
case 'h':
humanchar = 1;
break;
case '?':
default:
fprintf(stderr,
"usage: %s [-c | -m] [-hlw] [file ...]\n",
__progname);
return 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(NULL);
} else {
int dototal = (argc > 1);
do {
cnt(*argv);
} while(*++argv);
if (dototal)
print_counts(tlinect, twordct, tcharct, "total");
}
return rval;
}
static void
cnt(char *file)
{
static char *buf;
static size_t bufsz;
FILE *stream;
char *C;
wchar_t wc;
short gotsp;
ssize_t len;
int64_t linect, wordct, charct;
struct stat sbuf;
int fd;
linect = wordct = charct = 0;
stream = NULL;
if (file) {
if ((fd = open(file, O_RDONLY, 0)) < 0) {
warn("%s", file);
rval = 1;
return;
}
} else {
fd = STDIN_FILENO;
}
if (!doword && !multibyte) {
if (bufsz < MAXBSIZE &&
(buf = realloc(buf, MAXBSIZE)) == NULL)
err(1, NULL);
/*
* 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 {
if (file == NULL)
stream = stdin;
else if ((stream = fdopen(fd, "r")) == NULL) {
warn("%s", file);
close(fd);
rval = 1;
return;
}
/*
* Do it the hard way.
* According to POSIX, a word is a "maximal string of
* characters delimited by whitespace." Nothing is said
* about a character being printing or non-printing.
*/
gotsp = 1;
while ((len = getline(&buf, &bufsz, stream)) > 0) {
if (multibyte) {
const char *end = buf + len;
for (C = buf; C < end; C += len) {
++charct;
len = mbtowc(&wc, C, MB_CUR_MAX);
if (len == -1) {
mbtowc(NULL, NULL,
MB_CUR_MAX);
len = 1;
wc = L' ';
}
if (iswspace(wc)) {
gotsp = 1;
if (wc == L'\n')
++linect;
} else if (gotsp) {
gotsp = 0;
++wordct;
}
}
} else {
charct += len;
for (C = buf; len--; ++C) {
if (isspace((unsigned char)*C)) {
gotsp = 1;
if (*C == '\n')
++linect;
} else if (gotsp) {
gotsp = 0;
++wordct;
}
}
}
}
if (ferror(stream)) {
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 ((stream == NULL ? close(fd) : fclose(stream)) != 0) {
warn("%s", file);
rval = 1;
}
}
static void
format_and_print(int64_t v)
{
if (humanchar) {
char result[FMT_SCALED_STRSIZE];
fmt_scaled((long long)v, result);
printf("%7s", result);
} else {
printf(" %7lld", v);
}
}
static void
print_counts(int64_t lines, int64_t words, int64_t chars, char *name)
{
if (doline)
format_and_print(lines);
if (doword)
format_and_print(words);
if (dochar)
format_and_print(chars);
if (name)
printf(" %s\n", name);
else
printf("\n");
}