Annotation of src/usr.bin/wc/wc.c, Revision 1.28
1.28 ! cheloha 1: /* $OpenBSD: wc.c,v 1.27 2021/10/24 21:24:18 deraadt 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/param.h> /* MAXBSIZE */
33: #include <sys/stat.h>
1.22 guenther 34:
35: #include <fcntl.h>
1.1 deraadt 36: #include <stdio.h>
37: #include <stdlib.h>
38: #include <locale.h>
39: #include <ctype.h>
1.3 millert 40: #include <err.h>
1.1 deraadt 41: #include <unistd.h>
1.11 espie 42: #include <util.h>
1.20 schwarze 43: #include <wchar.h>
44: #include <wctype.h>
1.1 deraadt 45:
1.3 millert 46: int64_t tlinect, twordct, tcharct;
1.20 schwarze 47: int doline, doword, dochar, humanchar, multibyte;
1.21 fcambus 48: int rval;
1.3 millert 49: extern char *__progname;
50:
1.28 ! cheloha 51: static void print_counts(int64_t, int64_t, int64_t, const char *);
1.21 fcambus 52: static void format_and_print(int64_t);
1.28 ! cheloha 53: static void cnt(const char *);
1.1 deraadt 54:
55: int
1.8 deraadt 56: main(int argc, char *argv[])
1.1 deraadt 57: {
1.6 mpech 58: int ch;
1.1 deraadt 59:
1.20 schwarze 60: setlocale(LC_CTYPE, "");
1.18 deraadt 61:
1.19 deraadt 62: if (pledge("stdio rpath", NULL) == -1)
63: err(1, "pledge");
1.1 deraadt 64:
1.11 espie 65: while ((ch = getopt(argc, argv, "lwchm")) != -1)
1.16 okan 66: switch(ch) {
1.1 deraadt 67: case 'l':
68: doline = 1;
69: break;
70: case 'w':
71: doword = 1;
72: break;
1.20 schwarze 73: case 'm':
74: if (MB_CUR_MAX > 1)
75: multibyte = 1;
76: /* FALLTHROUGH */
1.1 deraadt 77: case 'c':
78: dochar = 1;
79: break;
1.11 espie 80: case 'h':
81: humanchar = 1;
82: break;
1.1 deraadt 83: case '?':
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:
1.20 schwarze 147: if (!doword && !multibyte) {
148: if (bufsz < MAXBSIZE &&
149: (buf = realloc(buf, MAXBSIZE)) == NULL)
150: err(1, NULL);
1.1 deraadt 151: /*
1.3 millert 152: * Line counting is split out because it's a lot
1.1 deraadt 153: * faster to get lines than to get words, since
154: * the word count requires some logic.
155: */
156: if (doline) {
1.3 millert 157: while ((len = read(fd, buf, MAXBSIZE)) > 0) {
1.1 deraadt 158: charct += len;
159: for (C = buf; len--; ++C)
160: if (*C == '\n')
161: ++linect;
162: }
163: if (len == -1) {
1.3 millert 164: warn("%s", file);
1.1 deraadt 165: rval = 1;
166: }
167: }
168: /*
1.3 millert 169: * If all we need is the number of characters and
1.1 deraadt 170: * it's a directory or a regular or linked file, just
171: * stat the puppy. We avoid testing for it not being
172: * a special device in case someone adds a new type
173: * of inode.
174: */
175: else if (dochar) {
1.3 millert 176: mode_t ifmt;
1.1 deraadt 177:
178: if (fstat(fd, &sbuf)) {
1.3 millert 179: warn("%s", file);
1.1 deraadt 180: rval = 1;
181: } else {
182: ifmt = sbuf.st_mode & S_IFMT;
183: if (ifmt == S_IFREG || ifmt == S_IFLNK
1.3 millert 184: || ifmt == S_IFDIR) {
1.1 deraadt 185: charct = sbuf.st_size;
186: } else {
1.3 millert 187: while ((len = read(fd, buf, MAXBSIZE)) > 0)
1.1 deraadt 188: charct += len;
189: if (len == -1) {
1.3 millert 190: warn("%s", file);
1.1 deraadt 191: rval = 1;
192: }
193: }
194: }
195: }
1.3 millert 196: } else {
1.28 ! cheloha 197: if (path == NULL)
1.20 schwarze 198: stream = stdin;
199: else if ((stream = fdopen(fd, "r")) == NULL) {
200: warn("%s", file);
201: close(fd);
202: rval = 1;
203: return;
204: }
205:
206: /*
207: * Do it the hard way.
208: * According to POSIX, a word is a "maximal string of
209: * characters delimited by whitespace." Nothing is said
210: * about a character being printing or non-printing.
211: */
1.1 deraadt 212: gotsp = 1;
1.20 schwarze 213: while ((len = getline(&buf, &bufsz, stream)) > 0) {
214: if (multibyte) {
1.23 cheloha 215: const char *end = buf + len;
216: for (C = buf; C < end; C += len) {
1.20 schwarze 217: ++charct;
218: len = mbtowc(&wc, C, MB_CUR_MAX);
219: if (len == -1) {
1.21 fcambus 220: mbtowc(NULL, NULL,
1.20 schwarze 221: MB_CUR_MAX);
222: len = 1;
1.25 schwarze 223: wc = L'?';
1.24 schwarze 224: } else if (len == 0)
225: len = 1;
1.20 schwarze 226: if (iswspace(wc)) {
227: gotsp = 1;
228: if (wc == L'\n')
229: ++linect;
230: } else if (gotsp) {
231: gotsp = 0;
232: ++wordct;
233: }
234: }
235: } else {
236: charct += len;
1.23 cheloha 237: for (C = buf; len--; ++C) {
1.20 schwarze 238: if (isspace((unsigned char)*C)) {
239: gotsp = 1;
240: if (*C == '\n')
241: ++linect;
242: } else if (gotsp) {
1.1 deraadt 243: gotsp = 0;
244: ++wordct;
245: }
246: }
247: }
248: }
1.20 schwarze 249: if (ferror(stream)) {
1.3 millert 250: warn("%s", file);
1.1 deraadt 251: rval = 1;
252: }
253: }
254:
1.28 ! cheloha 255: print_counts(linect, wordct, charct, path);
1.1 deraadt 256:
1.3 millert 257: /*
258: * Don't bother checking doline, doword, or dochar -- speeds
1.10 deraadt 259: * up the common case
1.3 millert 260: */
1.1 deraadt 261: tlinect += linect;
262: twordct += wordct;
263: tcharct += charct;
264:
1.20 schwarze 265: if ((stream == NULL ? close(fd) : fclose(stream)) != 0) {
1.3 millert 266: warn("%s", file);
1.1 deraadt 267: rval = 1;
268: }
269: }
270:
1.21 fcambus 271: static void
272: format_and_print(int64_t v)
1.11 espie 273: {
274: if (humanchar) {
275: char result[FMT_SCALED_STRSIZE];
276:
1.21 fcambus 277: fmt_scaled((long long)v, result);
278: printf("%7s", result);
1.11 espie 279: } else {
1.21 fcambus 280: printf(" %7lld", v);
1.11 espie 281: }
282: }
283:
1.21 fcambus 284: static void
1.28 ! cheloha 285: print_counts(int64_t lines, int64_t words, int64_t chars, const char *name)
1.1 deraadt 286: {
287: if (doline)
1.21 fcambus 288: format_and_print(lines);
1.1 deraadt 289: if (doword)
1.21 fcambus 290: format_and_print(words);
1.1 deraadt 291: if (dochar)
1.21 fcambus 292: format_and_print(chars);
1.1 deraadt 293:
1.12 otto 294: if (name)
1.21 fcambus 295: printf(" %s\n", name);
1.12 otto 296: else
1.21 fcambus 297: printf("\n");
1.1 deraadt 298: }
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