Suppress the error message for command -v for files with a slash.
[dragonfly.git] / bin / cat / cat.c
blobec22577b488cf0376954ba9af3554538ca6ac4c6
1 /*
2 * Copyright (c) 1989, 1993
3 * The Regents of the University of California. All rights reserved.
5 * This code is derived from software contributed to Berkeley by
6 * Kevin Fall.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by the University of
19 * California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
36 * @(#) Copyright (c) 1989, 1993 The Regents of the University of California. All rights reserved.
37 * @(#)cat.c 8.2 (Berkeley) 4/27/95
38 * $FreeBSD: src/bin/cat/cat.c,v 1.14.2.8 2002/06/29 05:09:26 tjr Exp $
39 * $DragonFly: src/bin/cat/cat.c,v 1.13 2004/11/07 23:44:38 dillon Exp $
42 #include <sys/param.h>
43 #include <sys/stat.h>
44 #ifndef NO_UDOM_SUPPORT
45 #include <sys/socket.h>
46 #include <sys/un.h>
47 #include <errno.h>
48 #endif
50 #include <ctype.h>
51 #include <err.h>
52 #include <fcntl.h>
53 #include <locale.h>
54 #include <stddef.h>
55 #include <stdio.h>
56 #include <stdlib.h>
57 #include <string.h>
58 #include <unistd.h>
60 static int bflag, eflag, nflag, sflag, tflag, vflag, rval;
61 static const char *filename;
63 static void scanfiles (char **, int);
64 static void cook_cat (FILE *);
65 static void raw_cat (int);
67 #ifndef NO_UDOM_SUPPORT
68 static int udom_open (const char *path, int flags);
69 #endif
71 static void
72 usage(void)
74 fprintf(stderr,
75 "usage: cat [-benstuv] [-] [file ...]\n");
76 exit(EXIT_FAILURE);
79 int
80 main(int argc, char **argv)
82 int ch;
84 setlocale(LC_CTYPE, "");
86 while ((ch = getopt(argc, argv, "benstuv")) != -1)
87 switch (ch) {
88 case 'b':
89 bflag = nflag = 1; /* -b implies -n */
90 break;
91 case 'e':
92 eflag = vflag = 1; /* -e implies -v */
93 break;
94 case 'n':
95 nflag = 1;
96 break;
97 case 's':
98 sflag = 1;
99 break;
100 case 't':
101 tflag = vflag = 1; /* -t implies -v */
102 break;
103 case 'u':
104 setbuf(stdout, NULL);
105 break;
106 case 'v':
107 vflag = 1;
108 break;
109 default:
110 usage();
111 /* NOTREACHED */
113 argv += optind;
115 if (bflag || eflag || nflag || sflag || tflag || vflag)
116 scanfiles(argv, 1);
117 else
118 scanfiles(argv, 0);
119 if (fclose(stdout))
120 err(1, "stdout");
121 exit(rval);
122 /* NOTREACHED */
125 static void
126 scanfiles(char **argv, int cooked)
128 char *path;
129 FILE *fp;
130 int fd;
131 int i;
133 i = 0;
135 while ((path = argv[i]) != NULL || i == 0) {
136 if (path == NULL || strcmp(path, "-") == 0) {
137 filename = "stdin";
138 fd = STDIN_FILENO;
139 } else {
140 filename = path;
141 fd = open(path, O_RDONLY);
142 #ifndef NO_UDOM_SUPPORT
143 if (fd < 0 && errno == EOPNOTSUPP)
144 fd = udom_open(path, O_RDONLY);
145 #endif
147 if (fd < 0) {
148 warn("%s", path);
149 rval = 1;
150 } else if (cooked) {
151 if (fd == STDIN_FILENO) {
152 cook_cat(stdin);
153 } else {
154 fp = fdopen(fd, "r");
155 if (fp == NULL)
156 err(1, "%s", path);
157 cook_cat(fp);
158 fclose(fp);
160 } else {
161 raw_cat(fd);
162 if (fd != STDIN_FILENO)
163 close(fd);
165 if (path == NULL)
166 break;
167 ++i;
171 static void
172 cook_cat(FILE *fp)
174 int ch, gobble, line, prev;
176 /* Reset EOF condition on stdin. */
177 if (fp == stdin && feof(stdin))
178 clearerr(stdin);
180 line = gobble = 0;
181 for (prev = '\n'; (ch = getc(fp)) != EOF; prev = ch) {
182 if (prev == '\n') {
183 if (ch == '\n') {
184 if (sflag) {
185 if (!gobble && putchar(ch) == EOF)
186 break;
187 gobble = 1;
188 continue;
190 if (nflag && !bflag) {
191 fprintf(stdout, "%6d\t", ++line);
192 if (ferror(stdout))
193 break;
195 } else if (nflag) {
196 fprintf(stdout, "%6d\t", ++line);
197 if (ferror(stdout))
198 break;
201 gobble = 0;
202 if (ch == '\n') {
203 if (eflag)
204 if (putchar('$') == EOF)
205 break;
206 } else if (ch == '\t') {
207 if (tflag) {
208 if (putchar('^') == EOF || putchar('I') == EOF)
209 break;
210 continue;
212 } else if (vflag) {
213 if (!isascii(ch) && !isprint(ch)) {
214 if (putchar('M') == EOF || putchar('-') == EOF)
215 break;
216 ch = toascii(ch);
218 if (iscntrl(ch)) {
219 if (putchar('^') == EOF ||
220 putchar(ch == '\177' ? '?' :
221 ch | 0100) == EOF)
222 break;
223 continue;
226 if (putchar(ch) == EOF)
227 break;
229 if (ferror(fp)) {
230 warn("%s", filename);
231 rval = 1;
232 clearerr(fp);
234 if (ferror(stdout))
235 err(1, "stdout");
238 static void
239 raw_cat(int rfd)
241 int off;
242 size_t nbsize;
243 ssize_t nr;
244 ssize_t nw;
245 struct stat rst;
246 static struct stat ost;
247 static size_t bsize;
248 static char *buf;
251 * Figure out the block size to use. Use the larger of stdout vs
252 * the passed descriptor. The minimum blocksize we use is BUFSIZ.
254 if (ost.st_blksize == 0) {
255 if (fstat(STDOUT_FILENO, &ost))
256 err(1, "<stdout>");
257 if (ost.st_blksize < BUFSIZ)
258 ost.st_blksize = BUFSIZ;
261 * note: rst.st_blksize can be 0, but it is handled ok.
263 if (fstat(rfd, &rst))
264 err(1, "%s", filename);
266 nbsize = MAX(ost.st_blksize, rst.st_blksize);
267 if (bsize != nbsize) {
268 bsize = nbsize;
269 if ((buf = realloc(buf, bsize)) == NULL)
270 err(1, "malloc failed");
272 while ((nr = read(rfd, buf, bsize)) > 0) {
273 for (off = 0; nr; nr -= nw, off += nw) {
274 nw = write(STDOUT_FILENO, buf + off, nr);
275 if (nw < 0)
276 err(1, "stdout");
279 if (nr < 0) {
280 warn("%s", filename);
281 rval = 1;
285 #ifndef NO_UDOM_SUPPORT
287 static int
288 udom_open(const char *path, int flags)
290 struct sockaddr_un sou;
291 int fd;
292 unsigned int len;
294 bzero(&sou, sizeof(sou));
297 * Construct the unix domain socket address and attempt to connect
299 fd = socket(AF_UNIX, SOCK_STREAM, 0);
300 if (fd >= 0) {
301 sou.sun_family = AF_UNIX;
302 snprintf(sou.sun_path, sizeof(sou.sun_path), "%s", path);
303 len = strlen(sou.sun_path);
304 len = offsetof(struct sockaddr_un, sun_path[len+1]);
306 if (connect(fd, (void *)&sou, len) < 0) {
307 close(fd);
308 fd = -1;
313 * handle the open flags by shutting down appropriate directions
315 if (fd >= 0) {
316 switch (flags & O_ACCMODE) {
317 case O_RDONLY:
318 if (shutdown(fd, SHUT_WR) == -1)
319 warn(NULL);
320 break;
321 case O_WRONLY:
322 if (shutdown(fd, SHUT_RD) == -1)
323 warn(NULL);
324 break;
325 default:
326 break;
329 return(fd);
332 #endif