2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 1989, 1993
5 * The Regents of the University of California. All rights reserved.
7 * This code is derived from software contributed to Berkeley by
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37 static char const copyright[] =
38 "@(#) Copyright (c) 1989, 1993\n\
39 The Regents of the University of California. All rights reserved.\n";
45 static char sccsid[] = "@(#)cat.c 8.2 (Berkeley) 4/27/95";
48 #include <sys/cdefs.h>
49 __FBSDID("$FreeBSD$");
51 #include <sys/param.h>
53 #ifndef NO_UDOM_SUPPORT
54 #include <sys/socket.h>
71 static int bflag, eflag, lflag, nflag, sflag, tflag, vflag;
73 static const char *filename;
75 static void usage(void) __dead2;
76 static void scanfiles(char *argv[], int cooked);
77 static void cook_cat(FILE *);
78 static void raw_cat(int);
80 #ifndef NO_UDOM_SUPPORT
81 static int udom_open(const char *path, int flags);
85 * Memory strategy threshold, in pages: if physmem is larger than this,
88 #define PHYSPAGES_THRESHOLD (32 * 1024)
90 /* Maximum buffer size in bytes - do not allow it to grow larger than this. */
91 #define BUFSIZE_MAX (2 * 1024 * 1024)
94 * Small (default) buffer size in bytes. It's inefficient for this to be
95 * smaller than MAXPHYS.
97 #define BUFSIZE_SMALL (MAXPHYS)
101 * For the bootstrapped cat binary (needed for locked appending to METALOG), we
102 * disable all flags except -l and -u to avoid non-portable function calls.
103 * In the future we may instead want to write a small portable bootstrap tool
104 * that locks the output file before writing to it. However, for now
105 * bootstrapping cat without multibyte support is the simpler solution.
108 #define SUPPORTED_FLAGS "lu"
110 #define SUPPORTED_FLAGS "belnstuv"
114 main(int argc, char *argv[])
117 struct flock stdout_lock;
119 setlocale(LC_CTYPE, "");
121 while ((ch = getopt(argc, argv, SUPPORTED_FLAGS)) != -1)
124 bflag = nflag = 1; /* -b implies -n */
127 eflag = vflag = 1; /* -e implies -v */
139 tflag = vflag = 1; /* -t implies -v */
142 setbuf(stdout, NULL);
153 stdout_lock.l_len = 0;
154 stdout_lock.l_start = 0;
155 stdout_lock.l_type = F_WRLCK;
156 stdout_lock.l_whence = SEEK_SET;
157 if (fcntl(STDOUT_FILENO, F_SETLKW, &stdout_lock) == -1)
158 err(EXIT_FAILURE, "stdout");
161 if (bflag || eflag || nflag || sflag || tflag || vflag)
175 fprintf(stderr, "usage: cat [-" SUPPORTED_FLAGS "] [file ...]\n");
181 scanfiles(char *argv[], int cooked)
189 while ((path = argv[i]) != NULL || i == 0) {
190 if (path == NULL || strcmp(path, "-") == 0) {
195 fd = open(path, O_RDONLY);
196 #ifndef NO_UDOM_SUPPORT
197 if (fd < 0 && errno == EOPNOTSUPP)
198 fd = udom_open(path, O_RDONLY);
204 #ifndef BOOTSTRAP_CAT
206 if (fd == STDIN_FILENO)
209 fp = fdopen(fd, "r");
216 if (fd != STDIN_FILENO)
225 #ifndef BOOTSTRAP_CAT
229 int ch, gobble, line, prev;
232 /* Reset EOF condition on stdin. */
233 if (fp == stdin && feof(stdin))
237 for (prev = '\n'; (ch = getc(fp)) != EOF; prev = ch) {
248 if (!bflag || ch != '\n') {
249 (void)fprintf(stdout, "%6d\t", ++line);
253 (void)fprintf(stdout, "%6s\t", "");
260 if (eflag && putchar('$') == EOF)
262 } else if (ch == '\t') {
264 if (putchar('^') == EOF || putchar('I') == EOF)
269 (void)ungetc(ch, fp);
271 * Our getwc(3) doesn't change file position
274 if ((wch = getwc(fp)) == WEOF) {
275 if (ferror(fp) && errno == EILSEQ) {
277 /* Resync attempt. */
278 memset(&fp->_mbstate, 0, sizeof(mbstate_t));
279 if ((ch = getc(fp)) == EOF)
286 if (!iswascii(wch) && !iswprint(wch)) {
288 if (putchar('M') == EOF || putchar('-') == EOF)
294 ch = (ch == '\177') ? '?' : (ch | 0100);
295 if (putchar('^') == EOF || putchar(ch) == EOF)
299 if (putwchar(wch) == WEOF)
304 if (putchar(ch) == EOF)
308 warn("%s", filename);
315 #endif /* BOOTSTRAP_CAT */
324 static char *buf = NULL;
327 wfd = fileno(stdout);
329 if (fstat(wfd, &sbuf))
331 if (S_ISREG(sbuf.st_mode)) {
332 /* If there's plenty of RAM, use a large copy buffer */
333 if (sysconf(_SC_PHYS_PAGES) > PHYSPAGES_THRESHOLD)
334 bsize = MIN(BUFSIZE_MAX, MAXPHYS * 8);
336 bsize = BUFSIZE_SMALL;
338 bsize = sbuf.st_blksize;
339 pagesize = sysconf(_SC_PAGESIZE);
341 bsize = MAX(bsize, (size_t)pagesize);
343 if ((buf = malloc(bsize)) == NULL)
344 err(1, "malloc() failure of IO buffer");
346 while ((nr = read(rfd, buf, bsize)) > 0)
347 for (off = 0; nr; nr -= nw, off += nw)
348 if ((nw = write(wfd, buf + off, (size_t)nr)) < 0)
351 warn("%s", filename);
356 #ifndef NO_UDOM_SUPPORT
359 udom_open(const char *path, int flags)
361 struct addrinfo hints, *res, *res0;
362 char rpath[PATH_MAX];
367 * Construct the unix domain socket address and attempt to connect.
369 bzero(&hints, sizeof(hints));
370 hints.ai_family = AF_LOCAL;
371 if (realpath(path, rpath) == NULL)
373 error = getaddrinfo(rpath, NULL, &hints, &res0);
375 warn("%s", gai_strerror(error));
379 for (res = res0; res != NULL; res = res->ai_next) {
380 fd = socket(res->ai_family, res->ai_socktype,
386 error = connect(fd, res->ai_addr, res->ai_addrlen);
397 * handle the open flags by shutting down appropriate directions
400 switch(flags & O_ACCMODE) {
402 if (shutdown(fd, SHUT_WR) == -1)
406 if (shutdown(fd, SHUT_RD) == -1)