2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 1988, 1993
5 * The Regents of the University of California. All rights reserved.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
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.
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
33 static const char copyright[] =
34 "@(#) Copyright (c) 1988, 1993\n\
35 The Regents of the University of California. All rights reserved.\n";
40 static char sccsid[] = "@(#)tee.c 8.1 (Berkeley) 6/6/93";
42 static const char rcsid[] =
46 #include <sys/capsicum.h>
47 #include <sys/queue.h>
49 #include <sys/types.h>
51 #include <capsicum_helpers.h>
64 STAILQ_ENTRY(entry) entries;
66 static STAILQ_HEAD(, entry) head = STAILQ_HEAD_INITIALIZER(head);
68 static void add(int, const char *);
69 static void usage(void) __dead2;
72 main(int argc, char *argv[])
75 int n, fd, rval, wval;
77 int append, ch, exitval;
79 #define BSIZE (8 * 1024)
82 while ((ch = getopt(argc, argv, "ai")) != -1)
88 (void)signal(SIGINT, SIG_IGN);
97 if ((buf = malloc(BSIZE)) == NULL)
100 if (caph_limit_stdin() == -1 || caph_limit_stderr() == -1)
101 err(EXIT_FAILURE, "unable to limit stdio");
103 add(STDOUT_FILENO, "stdout");
105 for (exitval = 0; *argv; ++argv)
106 if ((fd = open(*argv, append ? O_WRONLY|O_CREAT|O_APPEND :
107 O_WRONLY|O_CREAT|O_TRUNC, DEFFILEMODE)) < 0) {
113 if (caph_enter() < 0)
114 err(EXIT_FAILURE, "unable to enter capability mode");
115 while ((rval = read(STDIN_FILENO, buf, BSIZE)) > 0)
116 STAILQ_FOREACH(p, &head, entries) {
120 if ((wval = write(p->fd, bp, n)) == -1) {
136 (void)fprintf(stderr, "usage: tee [-ai] [file ...]\n");
141 add(int fd, const char *name)
146 if (fd == STDOUT_FILENO) {
147 if (caph_limit_stdout() == -1)
148 err(EXIT_FAILURE, "unable to limit stdout");
150 cap_rights_init(&rights, CAP_WRITE, CAP_FSTAT);
151 if (caph_rights_limit(fd, &rights) < 0)
152 err(EXIT_FAILURE, "unable to limit rights");
155 if ((p = malloc(sizeof(struct entry))) == NULL)
159 STAILQ_INSERT_HEAD(&head, p, entries);