2 * Copyright (c) 1988, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
31 static const char copyright[] =
32 "@(#) Copyright (c) 1988, 1993\n\
33 The Regents of the University of California. All rights reserved.\n";
38 static char sccsid[] = "@(#)tee.c 8.1 (Berkeley) 6/6/93";
40 static const char rcsid[] =
44 #include <sys/capsicum.h>
46 #include <sys/types.h>
58 typedef struct _list {
65 static void add(int, const char *);
66 static void usage(void);
69 main(int argc, char *argv[])
72 int n, fd, rval, wval;
74 int append, ch, exitval;
78 #define BSIZE (8 * 1024)
81 while ((ch = getopt(argc, argv, "ai")) != -1)
87 (void)signal(SIGINT, SIG_IGN);
96 if ((buf = malloc(BSIZE)) == NULL)
99 cap_rights_init(&rights, CAP_READ, CAP_FSTAT);
100 if (cap_rights_limit(STDIN_FILENO, &rights) < 0 && errno != ENOSYS)
101 err(EXIT_FAILURE, "unable to limit rights for stdin");
102 cap_rights_init(&rights, CAP_WRITE, CAP_FSTAT, CAP_IOCTL);
103 if (cap_rights_limit(STDERR_FILENO, &rights) < 0 && errno != ENOSYS)
104 err(EXIT_FAILURE, "unable to limit rights for stderr");
106 if (cap_ioctls_limit(STDERR_FILENO, &cmd, 1) < 0 && errno != ENOSYS)
107 err(EXIT_FAILURE, "unable to limit ioctls for stderr");
109 add(STDOUT_FILENO, "stdout");
111 for (exitval = 0; *argv; ++argv)
112 if ((fd = open(*argv, append ? O_WRONLY|O_CREAT|O_APPEND :
113 O_WRONLY|O_CREAT|O_TRUNC, DEFFILEMODE)) < 0) {
119 if (cap_enter() < 0 && errno != ENOSYS)
120 err(EXIT_FAILURE, "unable to enter capability mode");
121 while ((rval = read(STDIN_FILENO, buf, BSIZE)) > 0)
122 for (p = head; p; p = p->next) {
126 if ((wval = write(p->fd, bp, n)) == -1) {
142 (void)fprintf(stderr, "usage: tee [-ai] [file ...]\n");
147 add(int fd, const char *name)
153 if (fd == STDOUT_FILENO)
154 cap_rights_init(&rights, CAP_WRITE, CAP_FSTAT, CAP_IOCTL);
156 cap_rights_init(&rights, CAP_WRITE, CAP_FSTAT);
157 if (cap_rights_limit(fd, &rights) < 0 && errno != ENOSYS)
158 err(EXIT_FAILURE, "unable to limit rights");
160 if (fd == STDOUT_FILENO) {
162 if (cap_ioctls_limit(fd, &cmd, 1) < 0 && errno != ENOSYS)
163 err(EXIT_FAILURE, "unable to limit ioctls for stdout");
166 if ((p = malloc(sizeof(LIST))) == NULL)