/* * Copyright (c) 1999 Apple Computer, Inc. All rights reserved. * * @APPLE_LICENSE_HEADER_START@ * * Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved. * * This file contains Original Code and/or Modifications of Original Code * as defined in and that are subject to the Apple Public Source License * Version 2.0 (the 'License'). You may not use this file except in * compliance with the License. Please obtain a copy of the License at * http://www.opensource.apple.com/apsl/ and read it before using this * file. * * The Original Code and all software distributed under the License are * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. * Please see the License for the specific language governing rights and * limitations under the License. * * @APPLE_LICENSE_HEADER_END@ */ /* * Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved * * @(#)sigaction.c 1.0 */ #include <sys/syscall.h> #include <signal.h> #include <sys/signal.h> #include <errno.h> /* * Intercept the sigaction syscall and use our signal trampoline * as the signal handler instead. The code here is derived * from sigvec in sys/kern_sig.c. */ #if defined(__DYNAMIC__) extern int __in_sigtramp; #endif static int sigaction__ (sig, nsv, osv, bind) int sig; register struct sigaction *nsv, *osv; int bind; { struct sigaction vec; void (*prevsig)(); extern void _sigtramp(); struct __sigaction sa; struct __sigaction *sap; if (sig <= 0 || sig >= NSIG || sig == SIGKILL || sig == SIGSTOP) { errno = EINVAL; return (-1); } sap = (struct __sigaction *)0; if (nsv) { sa.sa_handler = nsv->sa_handler; sa.sa_tramp = _sigtramp; sa.sa_mask = nsv->sa_mask; sa.sa_flags = nsv->sa_flags; sap = &sa; if (nsv->sa_handler != (void (*)())SIG_DFL && nsv->sa_handler != (void (*)())SIG_IGN) { #ifdef __DYNAMIC__ if (bind && (__in_sigtramp == 0)) // XXX _dyld_bind_fully_image_containing_address(nsv->sa_handler); #endif } } if (syscall (SYS_sigaction, sig, sap, osv) < 0) { return (-1); } return (0); } int sigaction (sig, nsv, osv) int sig; register const struct sigaction *nsv; register struct sigaction *osv; { return sigaction__(sig, nsv, osv, 1); } // XXX #ifdef __DYNAMIC__ int _sigaction_nobind (sig, nsv, osv) int sig; register const struct sigaction *nsv; register struct sigaction *osv; { return sigaction__(sig, nsv, osv, 0); } #endif