1/*	$NetBSD: tee.c,v 1.6 1997/10/20 00:37:11 lukem Exp $	*/
2
3/*
4 * Copyright (c) 1988, 1993
5 *	The Regents of the University of California.  All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 3. All advertising materials mentioning features or use of this software
16 *    must display the following acknowledgement:
17 *	This product includes software developed by the University of
18 *	California, Berkeley and its contributors.
19 * 4. Neither the name of the University nor the names of its contributors
20 *    may be used to endorse or promote products derived from this software
21 *    without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 */
35
36#include <sys/cdefs.h>
37#ifndef lint
38__COPYRIGHT("@(#) Copyright (c) 1988, 1993\n\
39	The Regents of the University of California.  All rights reserved.\n");
40#endif /* not lint */
41
42#ifndef lint
43#if 0
44static char sccsid[] = "@(#)tee.c	8.1 (Berkeley) 6/6/93";
45#endif
46__RCSID("$NetBSD: tee.c,v 1.6 1997/10/20 00:37:11 lukem Exp $");
47#endif
48
49#include <sys/types.h>
50#include <sys/stat.h>
51#include <signal.h>
52#include <errno.h>
53#include <fcntl.h>
54#include <unistd.h>
55#include <stdio.h>
56#include <stdlib.h>
57#include <string.h>
58#include <locale.h>
59#include <err.h>
60
61typedef struct _list {
62	struct _list *next;
63	int fd;
64	char *name;
65} LIST;
66LIST *head;
67
68void	add __P((int, char *));
69int	main __P((int, char **));
70
71int
72main(argc, argv)
73	int argc;
74	char *argv[];
75{
76	LIST *p;
77	int n, fd, rval, wval;
78	char *bp;
79	int append, ch, exitval;
80	char *buf;
81#define	BSIZE (8 * 1024)
82
83	setlocale(LC_ALL, "");
84
85	append = 0;
86	while ((ch = getopt(argc, argv, "ai")) != -1)
87		switch((char)ch) {
88		case 'a':
89			append = 1;
90			break;
91		case 'i':
92			(void)signal(SIGINT, SIG_IGN);
93			break;
94		case '?':
95		default:
96			(void)fprintf(stderr, "usage: tee [-ai] [file ...]\n");
97			exit(1);
98		}
99	argv += optind;
100	argc -= optind;
101
102	if ((buf = malloc((size_t)BSIZE)) == NULL)
103		err(1, "malloc");
104
105	add(STDOUT_FILENO, "stdout");
106
107	for (exitval = 0; *argv; ++argv)
108		if ((fd = open(*argv, append ? O_WRONLY|O_CREAT|O_APPEND :
109		    O_WRONLY|O_CREAT|O_TRUNC, DEFFILEMODE)) < 0) {
110			warn("%s", *argv);
111			exitval = 1;
112		} else
113			add(fd, *argv);
114
115	while ((rval = read(STDIN_FILENO, buf, BSIZE)) > 0)
116		for (p = head; p; p = p->next) {
117			n = rval;
118			bp = buf;
119			do {
120				if ((wval = write(p->fd, bp, n)) == -1) {
121					warn("%s", p->name);
122					exitval = 1;
123					break;
124				}
125				bp += wval;
126			} while (n -= wval);
127		}
128	if (rval < 0) {
129		warn("read");
130		exitval = 1;
131	}
132
133	for (p = head; p; p = p->next) {
134		if (close(p->fd) == -1) {
135			warn("%s", p->name);
136			exitval = 1;
137		}
138	}
139
140	exit(exitval);
141}
142
143void
144add(fd, name)
145	int fd;
146	char *name;
147{
148	LIST *p;
149
150	if ((p = malloc((size_t)sizeof(LIST))) == NULL)
151		err(1, "malloc");
152	p->fd = fd;
153	p->name = name;
154	p->next = head;
155	head = p;
156}
157