Annotation of src/usr.bin/wc/wc.c, Revision 1.29
1.29 ! deraadt 1: /* $OpenBSD: wc.c,v 1.28 2021/11/16 23:34:24 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: case '?':
85: default:
1.21 fcambus 86: fprintf(stderr,
1.11 espie 87: "usage: %s [-c | -m] [-hlw] [file ...]\n",
1.3 millert 88: __progname);
1.21 fcambus 89: return 1;
1.1 deraadt 90: }
91: argv += optind;
92: argc -= optind;
93:
94: /*
95: * wc is unusual in that its flags are on by default, so,
96: * if you don't get any arguments, you have to turn them
97: * all on.
98: */
1.3 millert 99: if (!doline && !doword && !dochar)
1.1 deraadt 100: doline = doword = dochar = 1;
101:
102: if (!*argv) {
1.21 fcambus 103: cnt(NULL);
1.1 deraadt 104: } else {
105: int dototal = (argc > 1);
106:
107: do {
108: cnt(*argv);
109: } while(*++argv);
110:
1.3 millert 111: if (dototal)
1.10 deraadt 112: print_counts(tlinect, twordct, tcharct, "total");
1.1 deraadt 113: }
114:
1.21 fcambus 115: return rval;
1.1 deraadt 116: }
117:
1.21 fcambus 118: static void
1.28 cheloha 119: cnt(const char *path)
1.1 deraadt 120: {
1.20 schwarze 121: static char *buf;
1.21 fcambus 122: static size_t bufsz;
1.20 schwarze 123:
124: FILE *stream;
1.28 cheloha 125: const char *file;
1.20 schwarze 126: char *C;
127: wchar_t wc;
1.6 mpech 128: short gotsp;
1.20 schwarze 129: ssize_t len;
1.6 mpech 130: int64_t linect, wordct, charct;
1.1 deraadt 131: struct stat sbuf;
132: int fd;
133:
134: linect = wordct = charct = 0;
1.20 schwarze 135: stream = NULL;
1.28 cheloha 136: if (path != NULL) {
137: file = path;
1.27 deraadt 138: if ((fd = open(file, O_RDONLY)) == -1) {
1.3 millert 139: warn("%s", file);
1.1 deraadt 140: rval = 1;
141: return;
142: }
143: } else {
1.28 cheloha 144: file = "(stdin)";
1.1 deraadt 145: fd = STDIN_FILENO;
146: }
1.10 deraadt 147:
1.20 schwarze 148: if (!doword && !multibyte) {
1.29 ! deraadt 149: if (bufsz < _MAXBSIZE &&
! 150: (buf = realloc(buf, _MAXBSIZE)) == NULL)
1.20 schwarze 151: err(1, NULL);
1.1 deraadt 152: /*
1.3 millert 153: * Line counting is split out because it's a lot
1.1 deraadt 154: * faster to get lines than to get words, since
155: * the word count requires some logic.
156: */
157: if (doline) {
1.29 ! deraadt 158: while ((len = read(fd, buf, _MAXBSIZE)) > 0) {
1.1 deraadt 159: charct += len;
160: for (C = buf; len--; ++C)
161: if (*C == '\n')
162: ++linect;
163: }
164: if (len == -1) {
1.3 millert 165: warn("%s", file);
1.1 deraadt 166: rval = 1;
167: }
168: }
169: /*
1.3 millert 170: * If all we need is the number of characters and
1.1 deraadt 171: * it's a directory or a regular or linked file, just
172: * stat the puppy. We avoid testing for it not being
173: * a special device in case someone adds a new type
174: * of inode.
175: */
176: else if (dochar) {
1.3 millert 177: mode_t ifmt;
1.1 deraadt 178:
179: if (fstat(fd, &sbuf)) {
1.3 millert 180: warn("%s", file);
1.1 deraadt 181: rval = 1;
182: } else {
183: ifmt = sbuf.st_mode & S_IFMT;
184: if (ifmt == S_IFREG || ifmt == S_IFLNK
1.3 millert 185: || ifmt == S_IFDIR) {
1.1 deraadt 186: charct = sbuf.st_size;
187: } else {
1.29 ! deraadt 188: while ((len = read(fd, buf, _MAXBSIZE)) > 0)
1.1 deraadt 189: charct += len;
190: if (len == -1) {
1.3 millert 191: warn("%s", file);
1.1 deraadt 192: rval = 1;
193: }
194: }
195: }
196: }
1.3 millert 197: } else {
1.28 cheloha 198: if (path == NULL)
1.20 schwarze 199: stream = stdin;
200: else if ((stream = fdopen(fd, "r")) == NULL) {
201: warn("%s", file);
202: close(fd);
203: rval = 1;
204: return;
205: }
206:
207: /*
208: * Do it the hard way.
209: * According to POSIX, a word is a "maximal string of
210: * characters delimited by whitespace." Nothing is said
211: * about a character being printing or non-printing.
212: */
1.1 deraadt 213: gotsp = 1;
1.20 schwarze 214: while ((len = getline(&buf, &bufsz, stream)) > 0) {
215: if (multibyte) {
1.23 cheloha 216: const char *end = buf + len;
217: for (C = buf; C < end; C += len) {
1.20 schwarze 218: ++charct;
219: len = mbtowc(&wc, C, MB_CUR_MAX);
220: if (len == -1) {
1.21 fcambus 221: mbtowc(NULL, NULL,
1.20 schwarze 222: MB_CUR_MAX);
223: len = 1;
1.25 schwarze 224: wc = L'?';
1.24 schwarze 225: } else if (len == 0)
226: len = 1;
1.20 schwarze 227: if (iswspace(wc)) {
228: gotsp = 1;
229: if (wc == L'\n')
230: ++linect;
231: } else if (gotsp) {
232: gotsp = 0;
233: ++wordct;
234: }
235: }
236: } else {
237: charct += len;
1.23 cheloha 238: for (C = buf; len--; ++C) {
1.20 schwarze 239: if (isspace((unsigned char)*C)) {
240: gotsp = 1;
241: if (*C == '\n')
242: ++linect;
243: } else if (gotsp) {
1.1 deraadt 244: gotsp = 0;
245: ++wordct;
246: }
247: }
248: }
249: }
1.20 schwarze 250: if (ferror(stream)) {
1.3 millert 251: warn("%s", file);
1.1 deraadt 252: rval = 1;
253: }
254: }
255:
1.28 cheloha 256: print_counts(linect, wordct, charct, path);
1.1 deraadt 257:
1.3 millert 258: /*
259: * Don't bother checking doline, doword, or dochar -- speeds
1.10 deraadt 260: * up the common case
1.3 millert 261: */
1.1 deraadt 262: tlinect += linect;
263: twordct += wordct;
264: tcharct += charct;
265:
1.20 schwarze 266: if ((stream == NULL ? close(fd) : fclose(stream)) != 0) {
1.3 millert 267: warn("%s", file);
1.1 deraadt 268: rval = 1;
269: }
270: }
271:
1.21 fcambus 272: static void
273: format_and_print(int64_t v)
1.11 espie 274: {
275: if (humanchar) {
276: char result[FMT_SCALED_STRSIZE];
277:
1.21 fcambus 278: fmt_scaled((long long)v, result);
279: printf("%7s", result);
1.11 espie 280: } else {
1.21 fcambus 281: printf(" %7lld", v);
1.11 espie 282: }
283: }
284:
1.21 fcambus 285: static void
1.28 cheloha 286: print_counts(int64_t lines, int64_t words, int64_t chars, const char *name)
1.1 deraadt 287: {
288: if (doline)
1.21 fcambus 289: format_and_print(lines);
1.1 deraadt 290: if (doword)
1.21 fcambus 291: format_and_print(words);
1.1 deraadt 292: if (dochar)
1.21 fcambus 293: format_and_print(chars);
1.1 deraadt 294:
1.12 otto 295: if (name)
1.21 fcambus 296: printf(" %s\n", name);
1.12 otto 297: else
1.21 fcambus 298: printf("\n");
1.1 deraadt 299: }
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