wc.c revision 185714 
1/*
2 * Copyright (c) 1980, 1987, 1991, 1993
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 *    must display the following acknowledgement:
15 *	This product includes software developed by the University of
16 *	California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#ifndef lint
35static const char copyright[] =
36"@(#) Copyright (c) 1980, 1987, 1991, 1993\n\
37	The Regents of the University of California.  All rights reserved.\n";
38#endif /* not lint */
39
40#if 0
41#ifndef lint
42static char sccsid[] = "@(#)wc.c	8.1 (Berkeley) 6/6/93";
43#endif /* not lint */
44#endif
45
46#include <sys/cdefs.h>
47__FBSDID("$FreeBSD: head/usr.bin/wc/wc.c 185714 2008-12-06 19:21:56Z keramida $");
48
49#include <sys/param.h>
50#include <sys/stat.h>
51
52#include <ctype.h>
53#include <err.h>
54#include <errno.h>
55#include <fcntl.h>
56#include <locale.h>
57#include <stdint.h>
58#include <stdio.h>
59#include <stdlib.h>
60#include <string.h>
61#include <unistd.h>
62#include <wchar.h>
63#include <wctype.h>
64
65uintmax_t tlinect, twordct, tcharct, tlongline;
66int doline, doword, dochar, domulti, dolongline;
67
68static int	cnt(const char *);
69static void	usage(void);
70
71int
72main(int argc, char *argv[])
73{
74	int ch, errors, total;
75
76	(void) setlocale(LC_CTYPE, "");
77
78	while ((ch = getopt(argc, argv, "clmwL")) != -1)
79		switch((char)ch) {
80		case 'l':
81			doline = 1;
82			break;
83		case 'w':
84			doword = 1;
85			break;
86		case 'c':
87			dochar = 1;
88			domulti = 0;
89			break;
90		case 'L':
91			dolongline = 1;
92			break;
93		case 'm':
94			domulti = 1;
95			dochar = 0;
96			break;
97		case '?':
98		default:
99			usage();
100		}
101	argv += optind;
102	argc -= optind;
103
104	/* Wc's flags are on by default. */
105	if (doline + doword + dochar + domulti + dolongline == 0)
106		doline = doword = dochar = 1;
107
108	errors = 0;
109	total = 0;
110	if (!*argv) {
111		if (cnt((char *)NULL) != 0)
112			++errors;
113		else
114			(void)printf("\n");
115	}
116	else do {
117		if (cnt(*argv) != 0)
118			++errors;
119		else
120			(void)printf(" %s\n", *argv);
121		++total;
122	} while(*++argv);
123
124	if (total > 1) {
125		if (doline)
126			(void)printf(" %7ju", tlinect);
127		if (doword)
128			(void)printf(" %7ju", twordct);
129		if (dochar || domulti)
130			(void)printf(" %7ju", tcharct);
131		if (dolongline)
132			(void)printf(" %7ju", tlongline);
133		(void)printf(" total\n");
134	}
135	exit(errors == 0 ? 0 : 1);
136}
137
138static int
139cnt(const char *file)
140{
141	struct stat sb;
142	uintmax_t linect, wordct, charct, llct, tmpll;
143	int fd, len, warned;
144	size_t clen;
145	short gotsp;
146	u_char *p;
147	u_char buf[MAXBSIZE];
148	wchar_t wch;
149	mbstate_t mbs;
150
151	linect = wordct = charct = llct = tmpll = 0;
152	if (file == NULL) {
153		file = "stdin";
154		fd = STDIN_FILENO;
155	} else {
156		if ((fd = open(file, O_RDONLY, 0)) < 0) {
157			warn("%s: open", file);
158			return (1);
159		}
160		if (doword || (domulti && MB_CUR_MAX != 1))
161			goto word;
162		/*
163		 * Line counting is split out because it's a lot faster to get
164		 * lines than to get words, since the word count requires some
165		 * logic.
166		 */
167		if (doline) {
168			while ((len = read(fd, buf, MAXBSIZE))) {
169				if (len == -1) {
170					warn("%s: read", file);
171					(void)close(fd);
172					return (1);
173				}
174				charct += len;
175				for (p = buf; len--; ++p)
176					if (*p == '\n') {
177						if (tmpll > llct)
178							llct = tmpll;
179						tmpll = 0;
180						++linect;
181					} else
182						tmpll++;
183			}
184			tlinect += linect;
185			(void)printf(" %7ju", linect);
186			if (dochar) {
187				tcharct += charct;
188				(void)printf(" %7ju", charct);
189			}
190			if (dolongline) {
191				if (llct > tlongline)
192					tlongline = llct;
193				(void)printf(" %7ju", tlongline);
194			}
195			(void)close(fd);
196			return (0);
197		}
198		/*
199		 * If all we need is the number of characters and it's a
200		 * regular file, just stat the puppy.
201		 */
202		if (dochar || domulti) {
203			if (fstat(fd, &sb)) {
204				warn("%s: fstat", file);
205				(void)close(fd);
206				return (1);
207			}
208			if (S_ISREG(sb.st_mode)) {
209				(void)printf(" %7lld", (long long)sb.st_size);
210				tcharct += sb.st_size;
211				(void)close(fd);
212				return (0);
213			}
214		}
215	}
216
217	/* Do it the hard way... */
218word:	gotsp = 1;
219	warned = 0;
220	memset(&mbs, 0, sizeof(mbs));
221	while ((len = read(fd, buf, MAXBSIZE)) != 0) {
222		if (len == -1) {
223			warn("%s: read", file);
224			(void)close(fd);
225			return (1);
226		}
227		p = buf;
228		while (len > 0) {
229			if (!domulti || MB_CUR_MAX == 1) {
230				clen = 1;
231				wch = (unsigned char)*p;
232			} else if ((clen = mbrtowc(&wch, p, len, &mbs)) ==
233			    (size_t)-1) {
234				if (!warned) {
235					errno = EILSEQ;
236					warn("%s", file);
237					warned = 1;
238				}
239				memset(&mbs, 0, sizeof(mbs));
240				clen = 1;
241				wch = (unsigned char)*p;
242			} else if (clen == (size_t)-2)
243				break;
244			else if (clen == 0)
245				clen = 1;
246			charct++;
247			if (wch != L'\n')
248				tmpll++;
249			len -= clen;
250			p += clen;
251			if (wch == L'\n') {
252				if (tmpll > llct)
253					llct = tmpll;
254				tmpll = 0;
255				++linect;
256			}
257			if (iswspace(wch))
258				gotsp = 1;
259			else if (gotsp) {
260				gotsp = 0;
261				++wordct;
262			}
263		}
264	}
265	if (domulti && MB_CUR_MAX > 1)
266		if (mbrtowc(NULL, NULL, 0, &mbs) == (size_t)-1 && !warned)
267			warn("%s", file);
268	if (doline) {
269		tlinect += linect;
270		(void)printf(" %7ju", linect);
271	}
272	if (doword) {
273		twordct += wordct;
274		(void)printf(" %7ju", wordct);
275	}
276	if (dochar || domulti) {
277		tcharct += charct;
278		(void)printf(" %7ju", charct);
279	}
280	if (dolongline) {
281		if (llct > tlongline)
282			tlongline = llct;
283		(void)printf(" %7ju", llct);
284	}
285	(void)close(fd);
286	return (0);
287}
288
289static void
290usage()
291{
292	(void)fprintf(stderr, "usage: wc [-Lclmw] [file ...]\n");
293	exit(1);
294}
295