fbbd9655e5
Renumber cluase 4 to 3, per what everybody else did when BSD granted them permission to remove clause 3. My insistance on keeping the same numbering for legal reasons is too pedantic, so give up on that point. Submitted by: Jan Schaumann <jschauma@stevens.edu> Pull Request: https://github.com/freebsd/freebsd/pull/96
388 lines
8.4 KiB
C
388 lines
8.4 KiB
C
/*-
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* Copyright (c) 1989, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Kevin Fall.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#if 0
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#ifndef lint
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static char const copyright[] =
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"@(#) Copyright (c) 1989, 1993\n\
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The Regents of the University of California. All rights reserved.\n";
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#endif /* not lint */
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#endif
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)cat.c 8.2 (Berkeley) 4/27/95";
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#endif
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#endif /* not lint */
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/stat.h>
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#ifndef NO_UDOM_SUPPORT
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#include <sys/socket.h>
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#include <sys/un.h>
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#include <errno.h>
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#include <netdb.h>
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#endif
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#include <ctype.h>
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#include <err.h>
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#include <fcntl.h>
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#include <locale.h>
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#include <stddef.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <wchar.h>
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#include <wctype.h>
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static int bflag, eflag, lflag, nflag, sflag, tflag, vflag;
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static int rval;
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static const char *filename;
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static void usage(void) __dead2;
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static void scanfiles(char *argv[], int cooked);
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static void cook_cat(FILE *);
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static void raw_cat(int);
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#ifndef NO_UDOM_SUPPORT
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static int udom_open(const char *path, int flags);
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#endif
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/*
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* Memory strategy threshold, in pages: if physmem is larger than this,
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* use a large buffer.
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*/
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#define PHYSPAGES_THRESHOLD (32 * 1024)
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/* Maximum buffer size in bytes - do not allow it to grow larger than this. */
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#define BUFSIZE_MAX (2 * 1024 * 1024)
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/*
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* Small (default) buffer size in bytes. It's inefficient for this to be
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* smaller than MAXPHYS.
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*/
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#define BUFSIZE_SMALL (MAXPHYS)
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int
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main(int argc, char *argv[])
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{
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int ch;
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struct flock stdout_lock;
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setlocale(LC_CTYPE, "");
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while ((ch = getopt(argc, argv, "belnstuv")) != -1)
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switch (ch) {
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case 'b':
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bflag = nflag = 1; /* -b implies -n */
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break;
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case 'e':
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eflag = vflag = 1; /* -e implies -v */
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break;
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case 'l':
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lflag = 1;
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break;
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case 'n':
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nflag = 1;
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break;
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case 's':
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sflag = 1;
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break;
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case 't':
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tflag = vflag = 1; /* -t implies -v */
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break;
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case 'u':
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setbuf(stdout, NULL);
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break;
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case 'v':
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vflag = 1;
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break;
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default:
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usage();
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}
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argv += optind;
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if (lflag) {
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stdout_lock.l_len = 0;
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stdout_lock.l_start = 0;
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stdout_lock.l_type = F_WRLCK;
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stdout_lock.l_whence = SEEK_SET;
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if (fcntl(STDOUT_FILENO, F_SETLKW, &stdout_lock) == -1)
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err(EXIT_FAILURE, "stdout");
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}
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if (bflag || eflag || nflag || sflag || tflag || vflag)
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scanfiles(argv, 1);
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else
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scanfiles(argv, 0);
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if (fclose(stdout))
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err(1, "stdout");
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exit(rval);
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/* NOTREACHED */
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}
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static void
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usage(void)
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{
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fprintf(stderr, "usage: cat [-belnstuv] [file ...]\n");
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exit(1);
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/* NOTREACHED */
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}
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static void
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scanfiles(char *argv[], int cooked)
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{
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int fd, i;
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char *path;
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FILE *fp;
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i = 0;
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fd = -1;
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while ((path = argv[i]) != NULL || i == 0) {
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if (path == NULL || strcmp(path, "-") == 0) {
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filename = "stdin";
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fd = STDIN_FILENO;
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} else {
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filename = path;
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fd = open(path, O_RDONLY);
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#ifndef NO_UDOM_SUPPORT
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if (fd < 0 && errno == EOPNOTSUPP)
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fd = udom_open(path, O_RDONLY);
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#endif
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}
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if (fd < 0) {
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warn("%s", path);
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rval = 1;
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} else if (cooked) {
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if (fd == STDIN_FILENO)
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cook_cat(stdin);
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else {
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fp = fdopen(fd, "r");
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cook_cat(fp);
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fclose(fp);
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}
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} else {
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raw_cat(fd);
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if (fd != STDIN_FILENO)
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close(fd);
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}
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if (path == NULL)
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break;
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++i;
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}
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}
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static void
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cook_cat(FILE *fp)
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{
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int ch, gobble, line, prev;
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wint_t wch;
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/* Reset EOF condition on stdin. */
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if (fp == stdin && feof(stdin))
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clearerr(stdin);
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line = gobble = 0;
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for (prev = '\n'; (ch = getc(fp)) != EOF; prev = ch) {
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if (prev == '\n') {
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if (sflag) {
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if (ch == '\n') {
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if (gobble)
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continue;
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gobble = 1;
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} else
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gobble = 0;
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}
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if (nflag && (!bflag || ch != '\n')) {
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(void)fprintf(stdout, "%6d\t", ++line);
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if (ferror(stdout))
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break;
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}
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}
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if (ch == '\n') {
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if (eflag && putchar('$') == EOF)
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break;
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} else if (ch == '\t') {
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if (tflag) {
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if (putchar('^') == EOF || putchar('I') == EOF)
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break;
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continue;
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}
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} else if (vflag) {
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(void)ungetc(ch, fp);
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/*
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* Our getwc(3) doesn't change file position
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* on error.
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*/
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if ((wch = getwc(fp)) == WEOF) {
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if (ferror(fp) && errno == EILSEQ) {
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clearerr(fp);
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/* Resync attempt. */
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memset(&fp->_mbstate, 0, sizeof(mbstate_t));
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if ((ch = getc(fp)) == EOF)
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break;
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wch = ch;
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goto ilseq;
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} else
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break;
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}
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if (!iswascii(wch) && !iswprint(wch)) {
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ilseq:
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if (putchar('M') == EOF || putchar('-') == EOF)
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break;
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wch = toascii(wch);
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}
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if (iswcntrl(wch)) {
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ch = toascii(wch);
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ch = (ch == '\177') ? '?' : (ch | 0100);
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if (putchar('^') == EOF || putchar(ch) == EOF)
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break;
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continue;
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}
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if (putwchar(wch) == WEOF)
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break;
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ch = -1;
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continue;
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}
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if (putchar(ch) == EOF)
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break;
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}
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if (ferror(fp)) {
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warn("%s", filename);
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rval = 1;
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clearerr(fp);
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}
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if (ferror(stdout))
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err(1, "stdout");
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}
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static void
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raw_cat(int rfd)
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{
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int off, wfd;
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ssize_t nr, nw;
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static size_t bsize;
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static char *buf = NULL;
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struct stat sbuf;
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wfd = fileno(stdout);
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if (buf == NULL) {
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if (fstat(wfd, &sbuf))
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err(1, "stdout");
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if (S_ISREG(sbuf.st_mode)) {
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/* If there's plenty of RAM, use a large copy buffer */
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if (sysconf(_SC_PHYS_PAGES) > PHYSPAGES_THRESHOLD)
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bsize = MIN(BUFSIZE_MAX, MAXPHYS * 8);
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else
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bsize = BUFSIZE_SMALL;
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} else
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bsize = MAX(sbuf.st_blksize,
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(blksize_t)sysconf(_SC_PAGESIZE));
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if ((buf = malloc(bsize)) == NULL)
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err(1, "malloc() failure of IO buffer");
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}
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while ((nr = read(rfd, buf, bsize)) > 0)
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for (off = 0; nr; nr -= nw, off += nw)
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if ((nw = write(wfd, buf + off, (size_t)nr)) < 0)
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err(1, "stdout");
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if (nr < 0) {
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warn("%s", filename);
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rval = 1;
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}
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}
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#ifndef NO_UDOM_SUPPORT
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static int
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udom_open(const char *path, int flags)
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{
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struct addrinfo hints, *res, *res0;
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char rpath[PATH_MAX];
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int fd = -1;
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int error;
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/*
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* Construct the unix domain socket address and attempt to connect.
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*/
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bzero(&hints, sizeof(hints));
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hints.ai_family = AF_LOCAL;
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if (realpath(path, rpath) == NULL)
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return (-1);
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error = getaddrinfo(rpath, NULL, &hints, &res0);
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if (error) {
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warn("%s", gai_strerror(error));
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errno = EINVAL;
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return (-1);
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}
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for (res = res0; res != NULL; res = res->ai_next) {
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fd = socket(res->ai_family, res->ai_socktype,
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res->ai_protocol);
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if (fd < 0) {
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freeaddrinfo(res0);
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return (-1);
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}
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error = connect(fd, res->ai_addr, res->ai_addrlen);
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if (error == 0)
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break;
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else {
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close(fd);
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fd = -1;
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}
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}
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freeaddrinfo(res0);
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/*
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* handle the open flags by shutting down appropriate directions
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*/
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if (fd >= 0) {
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switch(flags & O_ACCMODE) {
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case O_RDONLY:
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if (shutdown(fd, SHUT_WR) == -1)
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warn(NULL);
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break;
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case O_WRONLY:
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if (shutdown(fd, SHUT_RD) == -1)
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warn(NULL);
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break;
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default:
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break;
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}
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}
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return (fd);
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}
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#endif
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