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/* $NetBSD: compat___sigaction14_sigtramp.c,v 1.1 2021/11/01 05:53:45 thorpej Exp $ */
/*-
* Copyright (c) 2002 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jason R. Thorpe.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
#if defined(LIBC_SCCS) && !defined(lint)
__RCSID("$NetBSD: compat___sigaction14_sigtramp.c,v 1.1 2021/11/01 05:53:45 thorpej Exp $");
#endif /* LIBC_SCCS and not lint */
#include <sys/types.h>
#include <stddef.h>
#include <signal.h>
#include <errno.h>
#include "extern.h"
#define C(a,b) __CONCAT(a,b)
#define __SIGTRAMP_SIGCONTEXT \
C(__sigtramp_sigcontext_,__SIGTRAMP_SIGCONTEXT_VERSION)
#define __SIGTRAMP_SIGINFO \
C(__sigtramp_siginfo_,__SIGTRAMP_SIGINFO_VERSION)
__weak_alias(__sigaction14, __libc_sigaction14)
#define __LIBC12_SOURCE__
/*
* The symbol must remain, but we don't want this exposed in a header
* anywhere, so the prototype goes here.
*/
int __libc_sigaction14(int, const struct sigaction *, struct sigaction *);
int
__libc_sigaction14(int sig, const struct sigaction *act, struct sigaction *oact)
{
extern const char __SIGTRAMP_SIGINFO[];
/*
* If no sigaction, use the "default" trampoline since it won't
* be used.
*/
if (act == NULL)
return __sigaction_sigtramp(sig, act, oact, NULL, 0);
#if defined(__HAVE_STRUCT_SIGCONTEXT) && defined(__LIBC12_SOURCE__)
/*
* We select the non-SA_SIGINFO trampoline if SA_SIGINFO is not
* set in the sigaction.
*/
if ((act->sa_flags & SA_SIGINFO) == 0) {
extern const char __SIGTRAMP_SIGCONTEXT[];
int sav = errno;
int rv = __sigaction_sigtramp(sig, act, oact,
__SIGTRAMP_SIGCONTEXT, __SIGTRAMP_SIGCONTEXT_VERSION);
if (rv >= 0 || errno != EINVAL)
return rv;
errno = sav;
}
#endif
/*
* If SA_SIGINFO was specified or the compatibility trampolines
* can't be used, use the siginfo trampoline.
*/
return __sigaction_sigtramp(sig, act, oact,
__SIGTRAMP_SIGINFO, __SIGTRAMP_SIGINFO_VERSION);
}
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