2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 1988, 1993
5 * The Regents of the University of California. All rights reserved.
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8 * modification, are permitted provided that the following conditions
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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
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21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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32 #include <sys/capsicum.h>
33 #include <sys/queue.h>
35 #include <sys/types.h>
37 #include <capsicum_helpers.h>
50 STAILQ_ENTRY(entry) entries;
52 static STAILQ_HEAD(, entry) head = STAILQ_HEAD_INITIALIZER(head);
54 static void add(int, const char *);
55 static void usage(void) __dead2;
58 main(int argc, char *argv[])
61 int n, fd, rval, wval;
63 int append, ch, exitval;
65 #define BSIZE (8 * 1024)
68 while ((ch = getopt(argc, argv, "ai")) != -1)
74 (void)signal(SIGINT, SIG_IGN);
83 if ((buf = malloc(BSIZE)) == NULL)
86 if (caph_limit_stdin() == -1 || caph_limit_stderr() == -1)
87 err(EXIT_FAILURE, "unable to limit stdio");
89 add(STDOUT_FILENO, "stdout");
91 for (exitval = 0; *argv; ++argv)
92 if ((fd = open(*argv, append ? O_WRONLY|O_CREAT|O_APPEND :
93 O_WRONLY|O_CREAT|O_TRUNC, DEFFILEMODE)) < 0) {
100 err(EXIT_FAILURE, "unable to enter capability mode");
101 while ((rval = read(STDIN_FILENO, buf, BSIZE)) > 0)
102 STAILQ_FOREACH(p, &head, entries) {
106 if ((wval = write(p->fd, bp, n)) == -1) {
122 (void)fprintf(stderr, "usage: tee [-ai] [file ...]\n");
127 add(int fd, const char *name)
132 if (fd == STDOUT_FILENO) {
133 if (caph_limit_stdout() == -1)
134 err(EXIT_FAILURE, "unable to limit stdout");
136 cap_rights_init(&rights, CAP_WRITE, CAP_FSTAT);
137 if (caph_rights_limit(fd, &rights) < 0)
138 err(EXIT_FAILURE, "unable to limit rights");
141 if ((p = malloc(sizeof(struct entry))) == NULL)
145 STAILQ_INSERT_HEAD(&head, p, entries);