305 lines
6.6 KiB
C
305 lines
6.6 KiB
C
/* $OpenBSD: wc.c,v 1.31 2022/12/04 23:50:50 cheloha Exp $ */
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/*
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* Copyright (c) 1980, 1987, 1991, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <locale.h>
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#include <ctype.h>
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#include <err.h>
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#include <unistd.h>
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#include <util.h>
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#include <wchar.h>
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#include <wctype.h>
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#define _MAXBSIZE (64 * 1024)
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int64_t tlinect, twordct, tcharct;
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int doline, doword, dochar, humanchar, multibyte;
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int rval;
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extern char *__progname;
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static void print_counts(int64_t, int64_t, int64_t, const char *);
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static void format_and_print(int64_t);
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static void cnt(const char *);
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int
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main(int argc, char *argv[])
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{
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int ch;
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setlocale(LC_CTYPE, "");
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if (pledge("stdio rpath", NULL) == -1)
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err(1, "pledge");
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while ((ch = getopt(argc, argv, "lwchm")) != -1)
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switch(ch) {
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case 'l':
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doline = 1;
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break;
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case 'w':
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doword = 1;
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break;
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case 'm':
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if (MB_CUR_MAX > 1)
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multibyte = 1;
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/* FALLTHROUGH */
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case 'c':
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dochar = 1;
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break;
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case 'h':
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humanchar = 1;
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break;
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default:
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fprintf(stderr,
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"usage: %s [-c | -m] [-hlw] [file ...]\n",
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__progname);
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return 1;
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}
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argv += optind;
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argc -= optind;
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/*
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* wc is unusual in that its flags are on by default, so,
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* if you don't get any arguments, you have to turn them
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* all on.
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*/
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if (!doline && !doword && !dochar)
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doline = doword = dochar = 1;
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if (!*argv) {
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cnt(NULL);
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} else {
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int dototal = (argc > 1);
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do {
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cnt(*argv);
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} while(*++argv);
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if (dototal)
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print_counts(tlinect, twordct, tcharct, "total");
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}
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return rval;
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}
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static void
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cnt(const char *path)
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{
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static char *buf;
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static size_t bufsz;
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FILE *stream;
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const char *file;
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char *C;
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wchar_t wc;
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short gotsp;
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ssize_t len;
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int64_t linect, wordct, charct;
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struct stat sbuf;
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int fd;
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linect = wordct = charct = 0;
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stream = NULL;
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if (path != NULL) {
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file = path;
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if ((fd = open(file, O_RDONLY)) == -1) {
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warn("%s", file);
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rval = 1;
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return;
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}
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} else {
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file = "(stdin)";
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fd = STDIN_FILENO;
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}
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if (!multibyte) {
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if (bufsz < _MAXBSIZE &&
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(buf = realloc(buf, _MAXBSIZE)) == NULL)
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err(1, NULL);
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/*
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* According to POSIX, a word is a "maximal string of
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* characters delimited by whitespace." Nothing is said
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* about a character being printing or non-printing.
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*/
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if (doword) {
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gotsp = 1;
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while ((len = read(fd, buf, _MAXBSIZE)) > 0) {
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charct += len;
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for (C = buf; len--; ++C) {
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if (isspace((unsigned char)*C)) {
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gotsp = 1;
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if (*C == '\n')
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++linect;
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} else if (gotsp) {
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gotsp = 0;
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++wordct;
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}
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}
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}
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if (len == -1) {
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warn("%s", file);
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rval = 1;
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}
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}
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/*
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* Line counting is split out because it's a lot
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* faster to get lines than to get words, since
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* the word count requires some logic.
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*/
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else if (doline) {
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while ((len = read(fd, buf, _MAXBSIZE)) > 0) {
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charct += len;
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for (C = buf; len--; ++C)
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if (*C == '\n')
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++linect;
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}
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if (len == -1) {
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warn("%s", file);
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rval = 1;
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}
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}
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/*
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* If all we need is the number of characters and
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* it's a directory or a regular or linked file, just
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* stat the puppy. We avoid testing for it not being
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* a special device in case someone adds a new type
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* of inode.
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*/
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else if (dochar) {
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mode_t ifmt;
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if (fstat(fd, &sbuf)) {
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warn("%s", file);
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rval = 1;
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} else {
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ifmt = sbuf.st_mode & S_IFMT;
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if (ifmt == S_IFREG || ifmt == S_IFLNK
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|| ifmt == S_IFDIR) {
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charct = sbuf.st_size;
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} else {
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while ((len = read(fd, buf, _MAXBSIZE)) > 0)
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charct += len;
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if (len == -1) {
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warn("%s", file);
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rval = 1;
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}
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}
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}
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}
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} else {
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if (path == NULL)
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stream = stdin;
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else if ((stream = fdopen(fd, "r")) == NULL) {
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warn("%s", file);
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close(fd);
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rval = 1;
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return;
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}
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gotsp = 1;
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while ((len = getline(&buf, &bufsz, stream)) > 0) {
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const char *end = buf + len;
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for (C = buf; C < end; C += len) {
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++charct;
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len = mbtowc(&wc, C, MB_CUR_MAX);
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if (len == -1) {
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mbtowc(NULL, NULL,
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MB_CUR_MAX);
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len = 1;
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wc = L'?';
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} else if (len == 0)
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len = 1;
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if (iswspace(wc)) {
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gotsp = 1;
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if (wc == L'\n')
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++linect;
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} else if (gotsp) {
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gotsp = 0;
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++wordct;
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}
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}
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}
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if (ferror(stream)) {
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warn("%s", file);
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rval = 1;
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}
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}
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print_counts(linect, wordct, charct, path);
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/*
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* Don't bother checking doline, doword, or dochar -- speeds
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* up the common case
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*/
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tlinect += linect;
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twordct += wordct;
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tcharct += charct;
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if ((stream == NULL ? close(fd) : fclose(stream)) != 0) {
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warn("%s", file);
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rval = 1;
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}
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}
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static void
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format_and_print(int64_t v)
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{
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if (humanchar) {
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char result[FMT_SCALED_STRSIZE];
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fmt_scaled((long long)v, result);
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printf("%7s", result);
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} else {
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printf(" %7lld", v);
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}
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}
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static void
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print_counts(int64_t lines, int64_t words, int64_t chars, const char *name)
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{
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if (doline)
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format_and_print(lines);
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if (doword)
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format_and_print(words);
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if (dochar)
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format_and_print(chars);
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if (name)
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printf(" %s\n", name);
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else
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printf("\n");
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}
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