1*4887Schin /*********************************************************************** 2*4887Schin * * 3*4887Schin * This software is part of the ast package * 4*4887Schin * Copyright (c) 1985-2007 AT&T Knowledge Ventures * 5*4887Schin * and is licensed under the * 6*4887Schin * Common Public License, Version 1.0 * 7*4887Schin * by AT&T Knowledge Ventures * 8*4887Schin * * 9*4887Schin * A copy of the License is available at * 10*4887Schin * http://www.opensource.org/licenses/cpl1.0.txt * 11*4887Schin * (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9) * 12*4887Schin * * 13*4887Schin * Information and Software Systems Research * 14*4887Schin * AT&T Research * 15*4887Schin * Florham Park NJ * 16*4887Schin * * 17*4887Schin * Glenn Fowler <gsf@research.att.com> * 18*4887Schin * David Korn <dgk@research.att.com> * 19*4887Schin * Phong Vo <kpv@research.att.com> * 20*4887Schin * * 21*4887Schin ***********************************************************************/ 22*4887Schin #pragma prototyped 23*4887Schin 24*4887Schin /* 25*4887Schin * signal that disables syscall restart on interrupt with clear signal mask 26*4887Schin * fun==SIG_DFL also unblocks signal 27*4887Schin */ 28*4887Schin 29*4887Schin #if !_UWIN 30*4887Schin 31*4887Schin #undef signal 32*4887Schin #define signal ______signal 33*4887Schin 34*4887Schin #endif 35*4887Schin 36*4887Schin #include <ast.h> 37*4887Schin #include <sig.h> 38*4887Schin 39*4887Schin #if !_UWIN 40*4887Schin 41*4887Schin #undef signal 42*4887Schin 43*4887Schin #undef _def_map_ast 44*4887Schin #include <ast_map.h> 45*4887Schin 46*4887Schin #if defined(__EXPORT__) 47*4887Schin #define extern __EXPORT__ 48*4887Schin #endif 49*4887Schin 50*4887Schin #endif 51*4887Schin 52*4887Schin #if defined(SV_ABORT) 53*4887Schin #undef SV_INTERRUPT 54*4887Schin #define SV_INTERRUPT SV_ABORT 55*4887Schin #endif 56*4887Schin 57*4887Schin #if !_std_signal && (_lib_sigaction && defined(SA_NOCLDSTOP) || _lib_sigvec && defined(SV_INTERRUPT)) 58*4887Schin 59*4887Schin #if !defined(SA_NOCLDSTOP) || !defined(SA_INTERRUPT) && defined(SV_INTERRUPT) 60*4887Schin #undef SA_INTERRUPT 61*4887Schin #define SA_INTERRUPT SV_INTERRUPT 62*4887Schin #undef sigaction 63*4887Schin #define sigaction sigvec 64*4887Schin #undef sigemptyset 65*4887Schin #define sigemptyset(p) (*(p)=0) 66*4887Schin #undef sa_flags 67*4887Schin #define sa_flags sv_flags 68*4887Schin #undef sa_handler 69*4887Schin #define sa_handler sv_handler 70*4887Schin #undef sa_mask 71*4887Schin #define sa_mask sv_mask 72*4887Schin #endif 73*4887Schin 74*4887Schin extern Sig_handler_t 75*4887Schin signal(int sig, Sig_handler_t fun) 76*4887Schin { 77*4887Schin struct sigaction na; 78*4887Schin struct sigaction oa; 79*4887Schin #ifdef SIGNO_MASK 80*4887Schin unsigned int flags; 81*4887Schin #endif 82*4887Schin 83*4887Schin #ifdef SIGNO_MASK 84*4887Schin flags = sig & ~SIGNO_MASK; 85*4887Schin sig &= SIGNO_MASK; 86*4887Schin #endif 87*4887Schin if (fun == SIG_DFL) 88*4887Schin sigunblock(sig); 89*4887Schin memzero(&na, sizeof(na)); 90*4887Schin na.sa_handler = fun; 91*4887Schin #if defined(SA_INTERRUPT) || defined(SA_RESTART) 92*4887Schin switch (sig) 93*4887Schin { 94*4887Schin #if defined(SIGIO) || defined(SIGTSTP) || defined(SIGTTIN) || defined(SIGTTOU) 95*4887Schin #if defined(SIGIO) 96*4887Schin case SIGIO: 97*4887Schin #endif 98*4887Schin #if defined(SIGTSTP) 99*4887Schin case SIGTSTP: 100*4887Schin #endif 101*4887Schin #if defined(SIGTTIN) 102*4887Schin case SIGTTIN: 103*4887Schin #endif 104*4887Schin #if defined(SIGTTOU) 105*4887Schin case SIGTTOU: 106*4887Schin #endif 107*4887Schin #if defined(SA_RESTART) 108*4887Schin na.sa_flags = SA_RESTART; 109*4887Schin #endif 110*4887Schin break; 111*4887Schin #endif 112*4887Schin default: 113*4887Schin #if defined(SA_INTERRUPT) 114*4887Schin na.sa_flags = SA_INTERRUPT; 115*4887Schin #endif 116*4887Schin break; 117*4887Schin } 118*4887Schin #endif 119*4887Schin return(sigaction(sig, &na, &oa) ? (Sig_handler_t)0 : oa.sa_handler); 120*4887Schin } 121*4887Schin 122*4887Schin #else 123*4887Schin 124*4887Schin NoN(signal) 125*4887Schin 126*4887Schin #endif 127