NetBSD/bin/cat/cat.c

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/* $NetBSD: cat.c,v 1.28 2001/09/16 12:12:13 wiz Exp $ */
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/*
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* Copyright (c) 1989, 1993
* The Regents of the University of California. All rights reserved.
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*
* This code is derived from software contributed to Berkeley by
* Kevin Fall.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
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#ifndef lint
__COPYRIGHT(
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"@(#) Copyright (c) 1989, 1993\n\
The Regents of the University of California. All rights reserved.\n");
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#endif /* not lint */
#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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#else
__RCSID("$NetBSD: cat.c,v 1.28 2001/09/16 12:12:13 wiz Exp $");
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#endif
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#endif /* not lint */
#include <sys/param.h>
#include <sys/stat.h>
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#include <ctype.h>
#include <err.h>
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#include <errno.h>
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#include <fcntl.h>
#include <locale.h>
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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
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#include <unistd.h>
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int bflag, eflag, fflag, nflag, sflag, tflag, vflag;
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int rval;
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const char *filename;
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int main(int, char *[]);
void cook_args(char *argv[]);
void cook_buf(FILE *);
void raw_args(char *argv[]);
void raw_cat(int);
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int
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main(int argc, char *argv[])
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{
int ch;
setprogname(argv[0]);
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(void)setlocale(LC_ALL, "");
while ((ch = getopt(argc, argv, "befnstuv")) != -1)
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switch (ch) {
case 'b':
bflag = nflag = 1; /* -b implies -n */
break;
case 'e':
eflag = vflag = 1; /* -e implies -v */
break;
case 'f':
fflag = 1;
break;
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case 'n':
nflag = 1;
break;
case 's':
sflag = 1;
break;
case 't':
tflag = vflag = 1; /* -t implies -v */
break;
case 'u':
setbuf(stdout, NULL);
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break;
case 'v':
vflag = 1;
break;
default:
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case '?':
(void)fprintf(stderr,
"usage: cat [-befnstuv] [-] [file ...]\n");
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exit(1);
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/* NOTREACHED */
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}
argv += optind;
if (bflag || eflag || nflag || sflag || tflag || vflag)
cook_args(argv);
else
raw_args(argv);
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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}
void
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cook_args(char **argv)
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{
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FILE *fp;
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fp = stdin;
filename = "stdin";
do {
if (*argv) {
if (!strcmp(*argv, "-"))
fp = stdin;
else if ((fp = fopen(*argv,
fflag ? "rf" : "r")) == NULL) {
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warn("%s", *argv);
rval = 1;
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++argv;
continue;
}
filename = *argv++;
}
cook_buf(fp);
if (fp != stdin)
(void)fclose(fp);
} while (*argv);
}
void
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cook_buf(FILE *fp)
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{
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int ch, gobble, line, prev;
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line = gobble = 0;
for (prev = '\n'; (ch = getc(fp)) != EOF; prev = ch) {
if (prev == '\n') {
if (ch == '\n') {
if (sflag) {
if (!gobble && putchar(ch) == EOF)
break;
gobble = 1;
continue;
}
if (nflag) {
if (!bflag) {
(void)fprintf(stdout,
"%6d\t", ++line);
if (ferror(stdout))
break;
} else if (eflag) {
(void)fprintf(stdout,
"%6s\t", "");
if (ferror(stdout))
break;
}
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}
} else if (nflag) {
(void)fprintf(stdout, "%6d\t", ++line);
if (ferror(stdout))
break;
}
}
gobble = 0;
if (ch == '\n') {
if (eflag)
if (putchar('$') == EOF)
break;
} else if (ch == '\t') {
if (tflag) {
if (putchar('^') == EOF || putchar('I') == EOF)
break;
continue;
}
} else if (vflag) {
if (!isascii(ch)) {
if (putchar('M') == EOF || putchar('-') == EOF)
break;
ch = toascii(ch);
}
if (iscntrl(ch)) {
if (putchar('^') == EOF ||
putchar(ch == '\177' ? '?' :
ch | 0100) == EOF)
break;
continue;
}
}
if (putchar(ch) == EOF)
break;
}
if (ferror(fp)) {
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warn("%s", filename);
rval = 1;
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clearerr(fp);
}
if (ferror(stdout))
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err(1, "stdout");
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}
void
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raw_args(char **argv)
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{
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int fd;
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fd = fileno(stdin);
filename = "stdin";
do {
if (*argv) {
if (!strcmp(*argv, "-"))
fd = fileno(stdin);
else if (fflag) {
struct stat st;
fd = open(*argv, O_RDONLY|O_NONBLOCK, 0);
if (fd < 0)
goto skip;
if (fstat(fd, &st) == -1) {
close(fd);
goto skip;
}
if (!S_ISREG(st.st_mode)) {
close(fd);
errno = EFTYPE;
goto skip;
}
}
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else if ((fd = open(*argv, O_RDONLY, 0)) < 0) {
skip:
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warn("%s", *argv);
rval = 1;
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++argv;
continue;
}
filename = *argv++;
}
raw_cat(fd);
if (fd != fileno(stdin))
(void)close(fd);
} while (*argv);
}
void
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raw_cat(int rfd)
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{
static char *buf;
static char fb_buf[BUFSIZ];
static size_t bsize;
struct stat sbuf;
ssize_t nr, nw, off;
int wfd;
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wfd = fileno(stdout);
if (buf == NULL) {
if (fstat(wfd, &sbuf) == 0) {
bsize = MIN(sbuf.st_blksize, SSIZE_MAX);
bsize = MAX(bsize, BUFSIZ);
buf = malloc(bsize);
}
if (buf == NULL) {
buf = fb_buf;
bsize = BUFSIZ;
}
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}
while ((nr = read(rfd, buf, bsize)) > 0)
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for (off = 0; nr; nr -= nw, off += nw)
if ((nw = write(wfd, buf + off, (size_t)nr)) < 0)
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err(1, "stdout");
if (nr < 0) {
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warn("%s", filename);
rval = 1;
}
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}