1 /* $NetBSD: tee.c,v 1.11 2013/03/06 11:44:11 yamt 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. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32 #include <sys/cdefs.h>
33 #ifndef lint
34 __COPYRIGHT("@(#) Copyright (c) 1988, 1993\
35 The Regents of the University of California. All rights reserved.");
36 #endif /* not lint */
37
38 #ifndef lint
39 #if 0
40 static char sccsid[] = "@(#)tee.c 8.1 (Berkeley) 6/6/93";
41 #endif
42 __RCSID("$NetBSD: tee.c,v 1.11 2013/03/06 11:44:11 yamt Exp $");
43 #endif
44
45 #include <sys/types.h>
46 #include <sys/stat.h>
47 #include <signal.h>
48 #include <errno.h>
49 #include <fcntl.h>
50 #include <unistd.h>
51 #include <stdio.h>
52 #include <stdlib.h>
53 #include <string.h>
54 #include <locale.h>
55 #include <err.h>
56
57 typedef struct _list {
58 struct _list *next;
59 int fd;
60 const char *name;
61 } LIST;
62 LIST *head;
63
64 void add(int, const char *);
65 int main(int, char **);
66
67 int
main(int argc,char * argv[])68 main(int argc, char *argv[])
69 {
70 LIST *p;
71 ssize_t rval;
72 int fd;
73 int append, ch, exitval;
74 char *buf;
75 #define BSIZE (8 * 1024)
76
77 setlocale(LC_ALL, "");
78
79 append = 0;
80 while ((ch = getopt(argc, argv, "ai")) != -1)
81 switch((char)ch) {
82 case 'a':
83 append = 1;
84 break;
85 case 'i':
86 (void)signal(SIGINT, SIG_IGN);
87 break;
88 case '?':
89 default:
90 (void)fprintf(stderr, "usage: tee [-ai] [file ...]\n");
91 exit(1);
92 }
93 argv += optind;
94 argc -= optind;
95
96 if ((buf = malloc(BSIZE)) == NULL)
97 err(1, "malloc");
98
99 add(STDOUT_FILENO, "stdout");
100
101 for (exitval = 0; *argv; ++argv)
102 if ((fd = open(*argv, append ? O_WRONLY|O_CREAT|O_APPEND :
103 O_WRONLY|O_CREAT|O_TRUNC, DEFFILEMODE)) < 0) {
104 warn("%s", *argv);
105 exitval = 1;
106 } else
107 add(fd, *argv);
108
109 while ((rval = read(STDIN_FILENO, buf, BSIZE)) > 0)
110 for (p = head; p; p = p->next) {
111 const char *bp = buf;
112 size_t n = rval;
113 ssize_t wval;
114
115 do {
116 if ((wval = write(p->fd, bp, n)) == -1) {
117 warn("%s", p->name);
118 exitval = 1;
119 break;
120 }
121 bp += wval;
122 } while (n -= wval);
123 }
124 if (rval < 0) {
125 warn("read");
126 exitval = 1;
127 }
128
129 for (p = head; p; p = p->next) {
130 if (close(p->fd) == -1) {
131 warn("%s", p->name);
132 exitval = 1;
133 }
134 }
135
136 exit(exitval);
137 }
138
139 void
add(int fd,const char * name)140 add(int fd, const char *name)
141 {
142 LIST *p;
143
144 if ((p = malloc(sizeof(LIST))) == NULL)
145 err(1, "malloc");
146 p->fd = fd;
147 p->name = name;
148 p->next = head;
149 head = p;
150 }
151