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
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
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 * 4. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 static char const copyright[] =
36 "@(#) Copyright (c) 1989, 1993\n\
37 The Regents of the University of California. All rights reserved.\n";
43 static char sccsid[] = "@(#)cat.c 8.2 (Berkeley) 4/27/95";
46 #include <sys/cdefs.h>
47 __FBSDID("$FreeBSD$");
49 #include <sys/param.h>
51 #ifndef NO_UDOM_SUPPORT
52 #include <sys/socket.h>
67 static int bflag, eflag, lflag, nflag, sflag, tflag, vflag;
69 static const char *filename;
71 static void usage(void);
72 static void scanfiles(char *argv[], int cooked);
73 static void cook_cat(FILE *);
74 static void raw_cat(int);
76 #ifndef NO_UDOM_SUPPORT
77 static int udom_open(const char *path, int flags);
81 * Memory strategy threshold, in pages: if physmem is larger than this,
84 #define PHYSPAGES_THRESHOLD (32 * 1024)
86 /* Maximum buffer size in bytes - do not allow it to grow larger than this. */
87 #define BUFSIZE_MAX (2 * 1024 * 1024)
90 * Small (default) buffer size in bytes. It's inefficient for this to be
91 * smaller than MAXPHYS.
93 #define BUFSIZE_SMALL (MAXPHYS)
96 main(int argc, char *argv[])
99 struct flock stdout_lock;
101 setlocale(LC_CTYPE, "");
103 while ((ch = getopt(argc, argv, "belnstuv")) != -1)
106 bflag = nflag = 1; /* -b implies -n */
109 eflag = vflag = 1; /* -e implies -v */
121 tflag = vflag = 1; /* -t implies -v */
124 setbuf(stdout, NULL);
135 stdout_lock.l_len = 0;
136 stdout_lock.l_start = 0;
137 stdout_lock.l_type = F_WRLCK;
138 stdout_lock.l_whence = SEEK_SET;
139 if (fcntl(STDOUT_FILENO, F_SETLKW, &stdout_lock) == -1)
140 err(EXIT_FAILURE, "stdout");
143 if (bflag || eflag || nflag || sflag || tflag || vflag)
156 fprintf(stderr, "usage: cat [-belnstuv] [file ...]\n");
162 scanfiles(char *argv[], int cooked)
169 while ((path = argv[i]) != NULL || i == 0) {
170 if (path == NULL || strcmp(path, "-") == 0) {
175 fd = open(path, O_RDONLY);
176 #ifndef NO_UDOM_SUPPORT
177 if (fd < 0 && errno == EOPNOTSUPP)
178 fd = udom_open(path, O_RDONLY);
185 if (fd == STDIN_FILENO)
188 fp = fdopen(fd, "r");
194 if (fd != STDIN_FILENO)
206 int ch, gobble, line, prev;
208 /* Reset EOF condition on stdin. */
209 if (fp == stdin && feof(stdin))
213 for (prev = '\n'; (ch = getc(fp)) != EOF; prev = ch) {
223 if (nflag && (!bflag || ch != '\n')) {
224 (void)fprintf(stdout, "%6d\t", ++line);
230 if (eflag && putchar('$') == EOF)
232 } else if (ch == '\t') {
234 if (putchar('^') == EOF || putchar('I') == EOF)
239 if (!isascii(ch) && !isprint(ch)) {
240 if (putchar('M') == EOF || putchar('-') == EOF)
245 if (putchar('^') == EOF ||
246 putchar(ch == '\177' ? '?' :
252 if (putchar(ch) == EOF)
256 warn("%s", filename);
270 static char *buf = NULL;
273 wfd = fileno(stdout);
275 if (fstat(wfd, &sbuf))
277 if (S_ISREG(sbuf.st_mode)) {
278 /* If there's plenty of RAM, use a large copy buffer */
279 if (sysconf(_SC_PHYS_PAGES) > PHYSPAGES_THRESHOLD)
280 bsize = MIN(BUFSIZE_MAX, MAXPHYS * 8);
282 bsize = BUFSIZE_SMALL;
284 bsize = MAX(sbuf.st_blksize,
285 (blksize_t)sysconf(_SC_PAGESIZE));
286 if ((buf = malloc(bsize)) == NULL)
287 err(1, "malloc() failure of IO buffer");
289 while ((nr = read(rfd, buf, bsize)) > 0)
290 for (off = 0; nr; nr -= nw, off += nw)
291 if ((nw = write(wfd, buf + off, (size_t)nr)) < 0)
294 warn("%s", filename);
299 #ifndef NO_UDOM_SUPPORT
302 udom_open(const char *path, int flags)
304 struct sockaddr_un sou;
308 bzero(&sou, sizeof(sou));
311 * Construct the unix domain socket address and attempt to connect
313 fd = socket(AF_UNIX, SOCK_STREAM, 0);
315 sou.sun_family = AF_UNIX;
316 if ((len = strlcpy(sou.sun_path, path,
317 sizeof(sou.sun_path))) >= sizeof(sou.sun_path)) {
318 errno = ENAMETOOLONG;
321 len = offsetof(struct sockaddr_un, sun_path[len+1]);
323 if (connect(fd, (void *)&sou, len) < 0) {
330 * handle the open flags by shutting down appropriate directions
333 switch(flags & O_ACCMODE) {
335 if (shutdown(fd, SHUT_WR) == -1)
339 if (shutdown(fd, SHUT_RD) == -1)