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