1 /* $NetBSD: compat___sigaction14_sigtramp.c,v 1.2 2024/01/20 14:52:46 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 2002 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jason R. Thorpe. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 #if defined(LIBC_SCCS) && !defined(lint) 34 __RCSID("$NetBSD: compat___sigaction14_sigtramp.c,v 1.2 2024/01/20 14:52:46 christos Exp $"); 35 #endif /* LIBC_SCCS and not lint */ 36 37 #define __LIBC12_SOURCE__ 38 #include <sys/types.h> 39 #include <stddef.h> 40 #include <sys/time.h> 41 #include <compat/sys/time.h> 42 #include <signal.h> 43 #include <compat/include/signal.h> 44 #include <errno.h> 45 46 #include "extern.h" 47 48 __weak_alias(__sigaction14, __libc_sigaction14) 49 50 int 51 __libc_sigaction14(int sig, const struct sigaction *act, struct sigaction *oact) 52 { 53 54 /* 55 * If no sigaction, use the "default" trampoline since it won't 56 * be used. 57 */ 58 if (act == NULL) 59 return __sigaction_sigtramp(sig, act, oact, NULL, 0); 60 61 #if defined(__HAVE_STRUCT_SIGCONTEXT) && defined(__LIBC12_SOURCE__) 62 /* 63 * We select the non-SA_SIGINFO trampoline if SA_SIGINFO is not 64 * set in the sigaction. 65 */ 66 if ((act->sa_flags & SA_SIGINFO) == 0) { 67 int sav = errno; 68 int rv = __sigaction_sigtramp(sig, act, oact, 69 __SIGTRAMP_SIGCONTEXT, __SIGTRAMP_SIGCONTEXT_VERSION); 70 if (rv >= 0 || errno != EINVAL) 71 return rv; 72 errno = sav; 73 } 74 #endif 75 76 /* 77 * If SA_SIGINFO was specified or the compatibility trampolines 78 * can't be used, use the siginfo trampoline. 79 */ 80 return __sigaction_sigtramp(sig, act, oact, 81 __SIGTRAMP_SIGINFO, __SIGTRAMP_SIGINFO_VERSION); 82 } 83