1/* $NetBSD$ */ 2 3/* signals.h -- header to include system dependent signal definitions. 4 Id: signals.h,v 1.2 2004/04/11 17:56:46 karl Exp 5 6 Copyright (C) 1993, 1994, 1995, 1997, 2002, 2004 Free Software Foundation, Inc. 7 8 This program is free software; you can redistribute it and/or modify 9 it under the terms of the GNU General Public License as published by 10 the Free Software Foundation; either version 2, or (at your option) 11 any later version. 12 13 This program is distributed in the hope that it will be useful, 14 but WITHOUT ANY WARRANTY; without even the implied warranty of 15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 GNU General Public License for more details. 17 18 You should have received a copy of the GNU General Public License 19 along with this program; if not, write to the Free Software 20 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 21 22 Originally written by Brian Fox (bfox@ai.mit.edu). */ 23 24#ifndef INFO_SIGNALS_H 25#define INFO_SIGNALS_H 26 27#include <sys/types.h> 28#include <signal.h> 29 30/* For sysV68 --phdm@info.ucl.ac.be. */ 31#if !defined (SIGCHLD) && defined (SIGCLD) 32#define SIGCHLD SIGCLD 33#endif 34 35#if !defined (HAVE_SIGPROCMASK) && !defined (sigmask) 36# define sigmask(x) (1 << ((x)-1)) 37#endif /* !HAVE_SIGPROCMASK && !sigmask */ 38 39/* Without SA_NOCLDSTOP, sigset_t might end up being undefined even 40 though we have sigprocmask, on older systems, according to Nelson 41 Beebe. The test is from coreutils/sort.c, via Paul Eggert. */ 42#if !defined (HAVE_SIGPROCMASK) || !defined (SA_NOCLDSTOP) 43# if !defined (SIG_BLOCK) 44# define SIG_UNBLOCK 1 45# define SIG_BLOCK 2 46# define SIG_SETMASK 3 47# endif /* SIG_BLOCK */ 48 49/* Type of a signal set. */ 50# define sigset_t int 51 52/* Make SET have no signals in it. */ 53# define sigemptyset(set) (*(set) = (sigset_t)0x0) 54 55/* Make SET have the full range of signal specifications possible. */ 56# define sigfillset(set) (*(set) = (sigset_t)0xffffffffff) 57 58/* Add SIG to the contents of SET. */ 59# define sigaddset(set, sig) *(set) |= sigmask (sig) 60 61/* Delete SIG from the contents of SET. */ 62# define sigdelset(set, sig) *(set) &= ~(sigmask (sig)) 63 64/* Tell if SET contains SIG. */ 65# define sigismember(set, sig) (*(set) & (sigmask (sig))) 66 67/* Suspend the process until the reception of one of the signals 68 not present in SET. */ 69# define sigsuspend(set) sigpause (*(set)) 70#endif /* !HAVE_SIGPROCMASK */ 71 72#if defined (HAVE_SIGPROCMASK) || defined (HAVE_SIGSETMASK) 73/* These definitions are used both in POSIX and non-POSIX implementations. */ 74 75#define BLOCK_SIGNAL(sig) \ 76 do { \ 77 sigset_t nvar, ovar; \ 78 sigemptyset (&nvar); \ 79 sigemptyset (&ovar); \ 80 sigaddset (&nvar, sig); \ 81 sigprocmask (SIG_BLOCK, &nvar, &ovar); \ 82 } while (0) 83 84#define UNBLOCK_SIGNAL(sig) \ 85 do { \ 86 sigset_t nvar, ovar; \ 87 sigemptyset (&ovar); \ 88 sigemptyset (&nvar); \ 89 sigaddset (&nvar, sig); \ 90 sigprocmask (SIG_UNBLOCK, &nvar, &ovar); \ 91 } while (0) 92 93#else /* !HAVE_SIGPROCMASK && !HAVE_SIGSETMASK */ 94# define BLOCK_SIGNAL(sig) 95# define UNBLOCK_SIGNAL(sig) 96#endif /* !HAVE_SIGPROCMASK && !HAVE_SIGSETMASK */ 97 98#endif /* not INFO_SIGNALS_H */ 99