1/*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1997 John Birrell <jb@cimlogic.com.au>.
5 * 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 author nor the names of any co-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 JOHN BIRRELL 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 AUTHOR 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__FBSDID("$FreeBSD$");
34
35#include "namespace.h"
36#include <errno.h>
37#include <signal.h>
38#include <pthread.h>
39#include "un-namespace.h"
40
41#include "thr_private.h"
42
43__weak_reference(_Tthr_kill, _pthread_kill);
44__weak_reference(_Tthr_kill, pthread_kill);
45
46int
47_Tthr_kill(pthread_t pthread, int sig)
48{
49	struct pthread *curthread;
50	int ret;
51
52	/* Check for invalid signal numbers: */
53	if (sig < 0 || sig > _SIG_MAXSIG)
54		/* Invalid signal: */
55		return (EINVAL);
56
57	curthread = _get_curthread();
58
59	/*
60	 * Ensure the thread is in the list of active threads, and the
61	 * signal is valid (signal 0 specifies error checking only) and
62	 * not being ignored:
63	 */
64	if (curthread == pthread) {
65		if (sig > 0)
66			_thr_send_sig(pthread, sig);
67		ret = 0;
68	} else if ((ret = _thr_find_thread(curthread, pthread,
69	    /*include dead*/0)) == 0) {
70		if (sig > 0)
71			_thr_send_sig(pthread, sig);
72		THR_THREAD_UNLOCK(curthread, pthread);
73	}
74
75	/* Return the completion status: */
76	return (ret);
77}
78