This will make a number of things easier in the future, as well as (finally!) avoiding the Id-smashing problem which has plagued developers for so long. Boy, I'm glad we're not using sup anymore. This update would have been insane otherwise.
262 lines
5.8 KiB
C
262 lines
5.8 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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. 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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* $FreeBSD$
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*/
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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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#ifndef lint
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static char const sccsid[] = "@(#)cat.c 8.2 (Berkeley) 4/27/95";
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#endif /* not lint */
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#include <sys/param.h>
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#include <sys/stat.h>
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#include <ctype.h>
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#include <err.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <locale.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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int bflag, eflag, nflag, sflag, tflag, vflag;
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int rval;
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char *filename;
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void cook_args __P((char *argv[]));
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void cook_buf __P((FILE *));
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void raw_args __P((char *argv[]));
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void raw_cat __P((int));
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int
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main(argc, argv)
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int argc;
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char *argv[];
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{
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extern int optind;
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int ch;
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setlocale(LC_CTYPE, "");
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while ((ch = getopt(argc, argv, "benstuv")) != EOF)
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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 '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, (char *)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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(void)fprintf(stderr,
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"usage: cat [-benstuv] [-] [file ...]\n");
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exit(1);
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}
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argv += optind;
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if (bflag || eflag || nflag || sflag || tflag || vflag)
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cook_args(argv);
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else
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raw_args(argv);
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if (fclose(stdout))
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err(1, "stdout");
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exit(rval);
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}
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void
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cook_args(argv)
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char **argv;
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{
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register FILE *fp;
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fp = stdin;
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filename = "stdin";
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do {
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if (*argv) {
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if (!strcmp(*argv, "-"))
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fp = stdin;
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else if ((fp = fopen(*argv, "r")) == NULL) {
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warn("%s", *argv);
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rval = 1;
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++argv;
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continue;
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}
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filename = *argv++;
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}
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cook_buf(fp);
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if (fp != stdin)
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(void)fclose(fp);
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} while (*argv);
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}
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void
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cook_buf(fp)
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register FILE *fp;
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{
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register int ch, gobble, line, prev;
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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 (ch == '\n') {
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if (sflag) {
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if (!gobble && putchar(ch) == EOF)
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break;
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gobble = 1;
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continue;
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}
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if (nflag && !bflag) {
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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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} else if (nflag) {
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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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gobble = 0;
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if (ch == '\n') {
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if (eflag)
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if (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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if (!isascii(ch) && !isprint(ch)) {
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if (putchar('M') == EOF || putchar('-') == EOF)
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break;
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ch = toascii(ch);
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}
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if (iscntrl(ch)) {
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if (putchar('^') == EOF ||
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putchar(ch == '\177' ? '?' :
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ch | 0100) == EOF)
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break;
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continue;
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}
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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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void
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raw_args(argv)
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char **argv;
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{
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register int fd;
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fd = fileno(stdin);
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filename = "stdin";
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do {
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if (*argv) {
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if (!strcmp(*argv, "-"))
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fd = fileno(stdin);
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else if ((fd = open(*argv, O_RDONLY, 0)) < 0) {
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warn("%s", *argv);
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rval = 1;
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++argv;
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continue;
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}
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filename = *argv++;
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}
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raw_cat(fd);
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if (fd != fileno(stdin))
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(void)close(fd);
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} while (*argv);
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}
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void
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raw_cat(rfd)
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register int rfd;
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{
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register int nr, nw, off, wfd;
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static int bsize;
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static char *buf;
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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, "%s", filename);
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bsize = MAX(sbuf.st_blksize, 1024);
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if ((buf = malloc((u_int)bsize)) == NULL)
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err(1, NULL);
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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, 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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