/* * Copyright (c) 1982, 1986, 1989, 1991, 1993 * The Regents of the University of California. All rights reserved. * (c) UNIX System Laboratories, Inc. * All or some portions of this file are derived from material licensed * to the University of California by American Telephone and Telegraph * Co. or Unix System Laboratories, Inc. and are reproduced herein with * the permission of UNIX System Laboratories, Inc. * * 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. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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. * * @(#)signal.h 8.4 (Berkeley) 5/4/95 * $FreeBSD: src/sys/sys/signal.h,v 1.23.2.2 2001/04/19 01:38:35 alfred Exp $ * $DragonFly: src/sys/sys/signal.h,v 1.2 2003/06/17 04:28:58 dillon Exp $ */ #ifndef _SYS_SIGNAL_H_ #define _SYS_SIGNAL_H_ #include #include /* * sigset_t macros. */ #define _SIG_WORDS 4 #define _SIG_MAXSIG 128 #define _SIG_IDX(sig) ((sig) - 1) #define _SIG_WORD(sig) (_SIG_IDX(sig) >> 5) #define _SIG_BIT(sig) (1 << (_SIG_IDX(sig) & 31)) #define _SIG_VALID(sig) ((sig) < _SIG_MAXSIG && (sig) > 0) /* * System defined signals. */ #define SIGHUP 1 /* hangup */ #define SIGINT 2 /* interrupt */ #define SIGQUIT 3 /* quit */ #define SIGILL 4 /* illegal instr. (not reset when caught) */ #ifndef _POSIX_SOURCE #define SIGTRAP 5 /* trace trap (not reset when caught) */ #endif #define SIGABRT 6 /* abort() */ #ifndef _POSIX_SOURCE #define SIGIOT SIGABRT /* compatibility */ #define SIGEMT 7 /* EMT instruction */ #endif #define SIGFPE 8 /* floating point exception */ #define SIGKILL 9 /* kill (cannot be caught or ignored) */ #ifndef _POSIX_SOURCE #define SIGBUS 10 /* bus error */ #endif #define SIGSEGV 11 /* segmentation violation */ #ifndef _POSIX_SOURCE #define SIGSYS 12 /* non-existent system call invoked */ #endif #define SIGPIPE 13 /* write on a pipe with no one to read it */ #define SIGALRM 14 /* alarm clock */ #define SIGTERM 15 /* software termination signal from kill */ #ifndef _POSIX_SOURCE #define SIGURG 16 /* urgent condition on IO channel */ #endif #define SIGSTOP 17 /* sendable stop signal not from tty */ #define SIGTSTP 18 /* stop signal from tty */ #define SIGCONT 19 /* continue a stopped process */ #define SIGCHLD 20 /* to parent on child stop or exit */ #define SIGTTIN 21 /* to readers pgrp upon background tty read */ #define SIGTTOU 22 /* like TTIN if (tp->t_local<OSTOP) */ #ifndef _POSIX_SOURCE #define SIGIO 23 /* input/output possible signal */ #define SIGXCPU 24 /* exceeded CPU time limit */ #define SIGXFSZ 25 /* exceeded file size limit */ #define SIGVTALRM 26 /* virtual time alarm */ #define SIGPROF 27 /* profiling time alarm */ #define SIGWINCH 28 /* window size changes */ #define SIGINFO 29 /* information request */ #endif #define SIGUSR1 30 /* user defined signal 1 */ #define SIGUSR2 31 /* user defined signal 2 */ /*- * Type of a signal handling function. * * Language spec sez signal handlers take exactly one arg, even though we * actually supply three. Ugh! * * We don't try to hide the difference by leaving out the args because * that would cause warnings about conformant programs. Nonconformant * programs can avoid the warnings by casting to (__sighandler_t *) or * sig_t before calling signal() or assigning to sa_handler or sv_handler. * * The kernel should reverse the cast before calling the function. It * has no way to do this, but on most machines 1-arg and 3-arg functions * have the same calling protocol so there is no problem in practice. * A bit in sa_flags could be used to specify the number of args. */ typedef void __sighandler_t __P((int)); #define SIG_DFL ((__sighandler_t *)0) #define SIG_IGN ((__sighandler_t *)1) #define SIG_ERR ((__sighandler_t *)-1) #if defined(_P1003_1B_VISIBLE) || defined(_KERNEL) union sigval { /* Members as suggested by Annex C of POSIX 1003.1b. */ int sigval_int; void *sigval_ptr; }; struct sigevent { int sigev_notify; /* Notification type */ union { int __sigev_signo; /* Signal number */ int __sigev_notify_kqueue; } __sigev_u; union sigval sigev_value; /* Signal value */ }; #define sigev_signo __sigev_u.__sigev_signo #define sigev_notify_kqueue __sigev_u.__sigev_notify_kqueue #define SIGEV_NONE 0 /* No async notification */ #define SIGEV_SIGNAL 1 /* Generate a queued signal */ #define SIGEV_KEVENT 3 /* Generate a kevent */ typedef struct __siginfo { int si_signo; /* signal number */ int si_errno; /* errno association */ /* * Cause of signal, one of the SI_ macros or signal-specific * values, i.e. one of the FPE_... values for SIGFPE. This * value is equivalent to the second argument to an old-style * FreeBSD signal handler. */ int si_code; /* signal code */ int si_pid; /* sending process */ unsigned int si_uid; /* sender's ruid */ int si_status; /* exit value */ void *si_addr; /* faulting instruction */ union sigval si_value; /* signal value */ long si_band; /* band event for SIGPOLL */ int __spare__[7]; /* gimme some slack */ } siginfo_t; #endif /* _P1003_1B_VISIBLE */ typedef struct __sigset { unsigned int __bits[_SIG_WORDS]; } sigset_t; /* * XXX - there are some nasty dependencies on include file order. Now that * sigset_t has been defined we can include the MD header. */ #include /* sig_atomic_t; trap codes; sigcontext */ #if !defined(_ANSI_SOURCE) struct __siginfo; /* * Signal vector "template" used in sigaction call. */ struct sigaction { union { void (*__sa_handler) __P((int)); void (*__sa_sigaction) __P((int, struct __siginfo *, void *)); } __sigaction_u; /* signal handler */ int sa_flags; /* see signal options below */ sigset_t sa_mask; /* signal mask to apply */ }; /* if SA_SIGINFO is set, sa_sigaction is to be used instead of sa_handler. */ #define sa_handler __sigaction_u.__sa_handler #define SA_NOCLDSTOP 0x0008 /* do not generate SIGCHLD on child stop */ #if !defined(_POSIX_SOURCE) #define sa_sigaction __sigaction_u.__sa_sigaction #define SA_ONSTACK 0x0001 /* take signal on signal stack */ #define SA_RESTART 0x0002 /* restart system call on signal return */ #define SA_RESETHAND 0x0004 /* reset to SIG_DFL when taking signal */ #define SA_NODEFER 0x0010 /* don't mask the signal we're delivering */ #define SA_NOCLDWAIT 0x0020 /* don't keep zombies around */ #define SA_SIGINFO 0x0040 /* signal handler with SA_SIGINFO args */ #ifdef COMPAT_SUNOS #define SA_USERTRAMP 0x0100 /* do not bounce off kernel's sigtramp */ #endif #define NSIG 32 /* number of old signals (counting 0) */ /* POSIX 1003.1b required values. */ #define SI_USER 0x10001 #define SI_QUEUE 0x10002 #define SI_TIMER 0x10003 #define SI_ASYNCIO 0x10004 #define SI_MESGQ 0x10005 /* Additional FreeBSD values. */ #define SI_UNDEFINED 0 typedef void __siginfohandler_t __P((int, struct __siginfo *, void *)); typedef __sighandler_t *sig_t; /* type of pointer to a signal function */ #ifdef _BSD_SIZE_T_ typedef _BSD_SIZE_T_ size_t; #undef _BSD_SIZE_T_ #endif /* * Structure used in sigaltstack call. */ typedef struct sigaltstack { char *ss_sp; /* signal stack base */ size_t ss_size; /* signal stack length */ int ss_flags; /* SS_DISABLE and/or SS_ONSTACK */ } stack_t; #define SS_ONSTACK 0x0001 /* take signal on alternate stack */ #define SS_DISABLE 0x0004 /* disable taking signals on alternate stack */ #define MINSIGSTKSZ 8192 /* minimum allowable stack */ #define SIGSTKSZ (MINSIGSTKSZ + 32768) /* recommended stack size */ /* Have enough typedefs for this now. XXX */ #include /* * 4.3 compatibility: * Signal vector "template" used in sigvec call. */ struct sigvec { __sighandler_t *sv_handler; /* signal handler */ int sv_mask; /* signal mask to apply */ int sv_flags; /* see signal options below */ }; #define SV_ONSTACK SA_ONSTACK #define SV_INTERRUPT SA_RESTART /* same bit, opposite sense */ #define SV_RESETHAND SA_RESETHAND #define SV_NODEFER SA_NODEFER #define SV_NOCLDSTOP SA_NOCLDSTOP #define SV_SIGINFO SA_SIGINFO #define sv_onstack sv_flags /* isn't compatibility wonderful! */ /* * Structure used in sigstack call. */ struct sigstack { char *ss_sp; /* signal stack pointer */ int ss_onstack; /* current status */ }; /* * Macro for converting signal number to a mask suitable for * sigblock(). */ #define sigmask(m) (1 << ((m)-1)) #define BADSIG SIG_ERR #endif /* !_POSIX_SOURCE */ /* * Flags for sigprocmask: */ #define SIG_BLOCK 1 /* block specified signal set */ #define SIG_UNBLOCK 2 /* unblock specified signal set */ #define SIG_SETMASK 3 /* set specified signal set */ #endif /* !_ANSI_SOURCE */ /* * For historical reasons; programs expect signal's return value to be * defined by . */ __BEGIN_DECLS __sighandler_t *signal __P((int, __sighandler_t *)); __END_DECLS #endif /* !_SYS_SIGNAL_H_ */