Annotation of src/usr.bin/wc/wc.c, Revision 1.31
1.31 ! cheloha 1: /* $OpenBSD: wc.c,v 1.30 2022/09/02 15:21:40 cheloha Exp $ */
1.2 deraadt 2:
1.1 deraadt 3: /*
1.3 millert 4: * Copyright (c) 1980, 1987, 1991, 1993
5: * The Regents of the University of California. All rights reserved.
1.1 deraadt 6: *
7: * Redistribution and use in source and binary forms, with or without
8: * modification, are permitted provided that the following conditions
9: * are met:
10: * 1. Redistributions of source code must retain the above copyright
11: * notice, this list of conditions and the following disclaimer.
12: * 2. Redistributions in binary form must reproduce the above copyright
13: * notice, this list of conditions and the following disclaimer in the
14: * documentation and/or other materials provided with the distribution.
1.9 millert 15: * 3. Neither the name of the University nor the names of its contributors
1.1 deraadt 16: * may be used to endorse or promote products derived from this software
17: * without specific prior written permission.
18: *
19: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29: * SUCH DAMAGE.
30: */
31:
1.17 deraadt 32: #include <sys/stat.h>
1.22 guenther 33:
34: #include <fcntl.h>
1.1 deraadt 35: #include <stdio.h>
36: #include <stdlib.h>
37: #include <locale.h>
38: #include <ctype.h>
1.3 millert 39: #include <err.h>
1.1 deraadt 40: #include <unistd.h>
1.11 espie 41: #include <util.h>
1.20 schwarze 42: #include <wchar.h>
43: #include <wctype.h>
1.1 deraadt 44:
1.29 deraadt 45: #define _MAXBSIZE (64 * 1024)
46:
1.3 millert 47: int64_t tlinect, twordct, tcharct;
1.20 schwarze 48: int doline, doword, dochar, humanchar, multibyte;
1.21 fcambus 49: int rval;
1.3 millert 50: extern char *__progname;
51:
1.28 cheloha 52: static void print_counts(int64_t, int64_t, int64_t, const char *);
1.21 fcambus 53: static void format_and_print(int64_t);
1.28 cheloha 54: static void cnt(const char *);
1.1 deraadt 55:
56: int
1.8 deraadt 57: main(int argc, char *argv[])
1.1 deraadt 58: {
1.6 mpech 59: int ch;
1.1 deraadt 60:
1.20 schwarze 61: setlocale(LC_CTYPE, "");
1.18 deraadt 62:
1.19 deraadt 63: if (pledge("stdio rpath", NULL) == -1)
64: err(1, "pledge");
1.1 deraadt 65:
1.11 espie 66: while ((ch = getopt(argc, argv, "lwchm")) != -1)
1.16 okan 67: switch(ch) {
1.1 deraadt 68: case 'l':
69: doline = 1;
70: break;
71: case 'w':
72: doword = 1;
73: break;
1.20 schwarze 74: case 'm':
75: if (MB_CUR_MAX > 1)
76: multibyte = 1;
77: /* FALLTHROUGH */
1.1 deraadt 78: case 'c':
79: dochar = 1;
80: break;
1.11 espie 81: case 'h':
82: humanchar = 1;
83: break;
1.1 deraadt 84: default:
1.21 fcambus 85: fprintf(stderr,
1.11 espie 86: "usage: %s [-c | -m] [-hlw] [file ...]\n",
1.3 millert 87: __progname);
1.21 fcambus 88: return 1;
1.1 deraadt 89: }
90: argv += optind;
91: argc -= optind;
92:
93: /*
94: * wc is unusual in that its flags are on by default, so,
95: * if you don't get any arguments, you have to turn them
96: * all on.
97: */
1.3 millert 98: if (!doline && !doword && !dochar)
1.1 deraadt 99: doline = doword = dochar = 1;
100:
101: if (!*argv) {
1.21 fcambus 102: cnt(NULL);
1.1 deraadt 103: } else {
104: int dototal = (argc > 1);
105:
106: do {
107: cnt(*argv);
108: } while(*++argv);
109:
1.3 millert 110: if (dototal)
1.10 deraadt 111: print_counts(tlinect, twordct, tcharct, "total");
1.1 deraadt 112: }
113:
1.21 fcambus 114: return rval;
1.1 deraadt 115: }
116:
1.21 fcambus 117: static void
1.28 cheloha 118: cnt(const char *path)
1.1 deraadt 119: {
1.20 schwarze 120: static char *buf;
1.21 fcambus 121: static size_t bufsz;
1.20 schwarze 122:
123: FILE *stream;
1.28 cheloha 124: const char *file;
1.20 schwarze 125: char *C;
126: wchar_t wc;
1.6 mpech 127: short gotsp;
1.20 schwarze 128: ssize_t len;
1.6 mpech 129: int64_t linect, wordct, charct;
1.1 deraadt 130: struct stat sbuf;
131: int fd;
132:
133: linect = wordct = charct = 0;
1.20 schwarze 134: stream = NULL;
1.28 cheloha 135: if (path != NULL) {
136: file = path;
1.27 deraadt 137: if ((fd = open(file, O_RDONLY)) == -1) {
1.3 millert 138: warn("%s", file);
1.1 deraadt 139: rval = 1;
140: return;
141: }
142: } else {
1.28 cheloha 143: file = "(stdin)";
1.1 deraadt 144: fd = STDIN_FILENO;
145: }
1.10 deraadt 146:
1.30 cheloha 147: if (!multibyte) {
1.29 deraadt 148: if (bufsz < _MAXBSIZE &&
149: (buf = realloc(buf, _MAXBSIZE)) == NULL)
1.20 schwarze 150: err(1, NULL);
1.30 cheloha 151:
152: /*
153: * According to POSIX, a word is a "maximal string of
154: * characters delimited by whitespace." Nothing is said
155: * about a character being printing or non-printing.
156: */
157: if (doword) {
158: gotsp = 1;
159: while ((len = read(fd, buf, _MAXBSIZE)) > 0) {
160: charct += len;
161: for (C = buf; len--; ++C) {
162: if (isspace((unsigned char)*C)) {
163: gotsp = 1;
164: if (*C == '\n')
165: ++linect;
166: } else if (gotsp) {
167: gotsp = 0;
168: ++wordct;
169: }
170: }
171: }
172: if (len == -1) {
173: warn("%s", file);
174: rval = 1;
175: }
176: }
1.1 deraadt 177: /*
1.3 millert 178: * Line counting is split out because it's a lot
1.1 deraadt 179: * faster to get lines than to get words, since
180: * the word count requires some logic.
181: */
1.30 cheloha 182: else if (doline) {
1.29 deraadt 183: while ((len = read(fd, buf, _MAXBSIZE)) > 0) {
1.1 deraadt 184: charct += len;
185: for (C = buf; len--; ++C)
186: if (*C == '\n')
187: ++linect;
188: }
189: if (len == -1) {
1.3 millert 190: warn("%s", file);
1.1 deraadt 191: rval = 1;
192: }
193: }
194: /*
1.3 millert 195: * If all we need is the number of characters and
1.1 deraadt 196: * it's a directory or a regular or linked file, just
197: * stat the puppy. We avoid testing for it not being
198: * a special device in case someone adds a new type
199: * of inode.
200: */
201: else if (dochar) {
1.3 millert 202: mode_t ifmt;
1.1 deraadt 203:
204: if (fstat(fd, &sbuf)) {
1.3 millert 205: warn("%s", file);
1.1 deraadt 206: rval = 1;
207: } else {
208: ifmt = sbuf.st_mode & S_IFMT;
209: if (ifmt == S_IFREG || ifmt == S_IFLNK
1.3 millert 210: || ifmt == S_IFDIR) {
1.1 deraadt 211: charct = sbuf.st_size;
212: } else {
1.29 deraadt 213: while ((len = read(fd, buf, _MAXBSIZE)) > 0)
1.1 deraadt 214: charct += len;
215: if (len == -1) {
1.3 millert 216: warn("%s", file);
1.1 deraadt 217: rval = 1;
218: }
219: }
220: }
221: }
1.3 millert 222: } else {
1.28 cheloha 223: if (path == NULL)
1.20 schwarze 224: stream = stdin;
225: else if ((stream = fdopen(fd, "r")) == NULL) {
226: warn("%s", file);
227: close(fd);
228: rval = 1;
229: return;
230: }
231:
1.1 deraadt 232: gotsp = 1;
1.20 schwarze 233: while ((len = getline(&buf, &bufsz, stream)) > 0) {
1.30 cheloha 234: const char *end = buf + len;
235: for (C = buf; C < end; C += len) {
236: ++charct;
237: len = mbtowc(&wc, C, MB_CUR_MAX);
238: if (len == -1) {
239: mbtowc(NULL, NULL,
240: MB_CUR_MAX);
241: len = 1;
242: wc = L'?';
243: } else if (len == 0)
244: len = 1;
245: if (iswspace(wc)) {
246: gotsp = 1;
247: if (wc == L'\n')
248: ++linect;
249: } else if (gotsp) {
250: gotsp = 0;
251: ++wordct;
1.1 deraadt 252: }
253: }
254: }
1.20 schwarze 255: if (ferror(stream)) {
1.3 millert 256: warn("%s", file);
1.1 deraadt 257: rval = 1;
258: }
259: }
260:
1.28 cheloha 261: print_counts(linect, wordct, charct, path);
1.1 deraadt 262:
1.3 millert 263: /*
264: * Don't bother checking doline, doword, or dochar -- speeds
1.10 deraadt 265: * up the common case
1.3 millert 266: */
1.1 deraadt 267: tlinect += linect;
268: twordct += wordct;
269: tcharct += charct;
270:
1.20 schwarze 271: if ((stream == NULL ? close(fd) : fclose(stream)) != 0) {
1.3 millert 272: warn("%s", file);
1.1 deraadt 273: rval = 1;
274: }
275: }
276:
1.21 fcambus 277: static void
278: format_and_print(int64_t v)
1.11 espie 279: {
280: if (humanchar) {
281: char result[FMT_SCALED_STRSIZE];
282:
1.21 fcambus 283: fmt_scaled((long long)v, result);
284: printf("%7s", result);
1.11 espie 285: } else {
1.21 fcambus 286: printf(" %7lld", v);
1.11 espie 287: }
288: }
289:
1.21 fcambus 290: static void
1.28 cheloha 291: print_counts(int64_t lines, int64_t words, int64_t chars, const char *name)
1.1 deraadt 292: {
293: if (doline)
1.21 fcambus 294: format_and_print(lines);
1.1 deraadt 295: if (doword)
1.21 fcambus 296: format_and_print(words);
1.1 deraadt 297: if (dochar)
1.21 fcambus 298: format_and_print(chars);
1.1 deraadt 299:
1.12 otto 300: if (name)
1.21 fcambus 301: printf(" %s\n", name);
1.12 otto 302: else
1.21 fcambus 303: printf("\n");
1.1 deraadt 304: }
![[BACK]](/icons/back.gif){kind=icon}
Return to wc.c CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [local] / src / usr.bin / wc