/* * 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. 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 $ */ #ifndef _SYS_SIGNAL_H_ #define _SYS_SIGNAL_H_ #include <sys/cdefs.h> #include <sys/_siginfo.h> #include <sys/_sigset.h> #include <machine/stdint.h> #ifndef _PID_T_DECLARED typedef __pid_t pid_t; #define _PID_T_DECLARED #endif #ifndef _SIZE_T_DECLARED typedef __size_t size_t; #define _SIZE_T_DECLARED #endif #ifndef _UID_T_DECLARED typedef __uint32_t uid_t; #define _UID_T_DECLARED #endif /* * sigset_t macros. */ #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. */ #if __POSIX_VISIBLE #define SIGHUP 1 /* hangup */ #endif #define SIGINT 2 /* interrupt */ #if __POSIX_VISIBLE #define SIGQUIT 3 /* quit */ #endif #define SIGILL 4 /* illegal instr. (not reset when caught) */ #if __XSI_VISIBLE #define SIGTRAP 5 /* trace trap (not reset when caught) */ #endif #define SIGABRT 6 /* abort() */ #if __BSD_VISIBLE #define SIGIOT SIGABRT /* compatibility */ #define SIGEMT 7 /* EMT instruction */ #endif #define SIGFPE 8 /* floating point exception */ #if __POSIX_VISIBLE #define SIGKILL 9 /* kill (cannot be caught or ignored) */ #endif #if __POSIX_VISIBLE >= 200112 || __XSI_VISIBLE #define SIGBUS 10 /* bus error */ #endif #define SIGSEGV 11 /* segmentation violation */ #if __POSIX_VISIBLE >= 200112 || __XSI_VISIBLE #define SIGSYS 12 /* non-existent system call invoked */ #endif #if __POSIX_VISIBLE #define SIGPIPE 13 /* write on a pipe with no one to read it */ #define SIGALRM 14 /* alarm clock */ #endif #define SIGTERM 15 /* software termination signal from kill */ #if __POSIX_VISIBLE >= 200112 || __XSI_VISIBLE #define SIGURG 16 /* urgent condition on IO channel */ #endif #if __POSIX_VISIBLE #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) */ #endif #if __BSD_VISIBLE #define SIGIO 23 /* input/output possible signal */ #endif #if __XSI_VISIBLE #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 */ #endif #if __BSD_VISIBLE #define SIGWINCH 28 /* window size changes */ #define SIGINFO 29 /* information request */ #endif #if __POSIX_VISIBLE #define SIGUSR1 30 /* user defined signal 1 */ #define SIGUSR2 31 /* user defined signal 2 */ #endif #if __BSD_VISIBLE #define SIGTHR 32 /* Thread interrupt (FreeBSD-5 reserved) */ #define SIGCKPT 33 /* checkpoint and continue */ #define SIGCKPTEXIT 34 /* checkpoint and exit */ #endif #define SIGRTMIN 65 /* min realtime signal */ #define SIGRTMAX 126 /* max realtime signal */ /*- * 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. * * SIG_EINTR causes system calls to interrupt but generates no signal * delivery. The caller is responsible for polling the event. */ typedef void __sighandler_t (int); #define SIG_DFL ((__sighandler_t *)0) #define SIG_IGN ((__sighandler_t *)1) #define SIG_ERR ((__sighandler_t *)-1) #if __POSIX_VISIBLE >= 199309 #if !defined(_KERNEL) || defined(_KERNEL_VIRTUAL) #ifndef _PTHREAD_ATTR_T_DECLARED struct __pthread_attr_s; typedef struct __pthread_attr_s *pthread_attr_t; #define _PTHREAD_ATTR_T_DECLARED #endif #endif struct sigevent { int sigev_notify; /* Notification type */ union { int __sigev_signo; /* Signal number */ int __sigev_notify_kqueue; #ifdef _KERNEL void *__sigev_notify_attributes; #else pthread_attr_t *__sigev_notify_attributes; #endif } __sigev_u; union sigval sigev_value; /* Signal value */ void (*sigev_notify_function)(union sigval); }; #define sigev_signo __sigev_u.__sigev_signo #define sigev_notify_attributes __sigev_u.__sigev_notify_attributes #if __BSD_VISIBLE #define sigev_notify_kqueue __sigev_u.__sigev_notify_kqueue #endif #define SIGEV_NONE 0 /* No async notification */ #define SIGEV_SIGNAL 1 /* Generate a queued signal */ #define SIGEV_THREAD 2 /* Call back in a pthread */ #if __BSD_VISIBLE #define SIGEV_KEVENT 3 /* Generate a kevent */ #endif #endif /* __POSIX_VISIBLE >= 199309 */ #ifndef _SIGSET_T_DECLARED typedef struct __sigset sigset_t; #define _SIGSET_T_DECLARED #endif /* * XXX - there are some nasty dependencies on include file order. Now that * sigset_t has been defined we can include the MD header. */ #include <machine/signal.h> /* sig_atomic_t; trap codes; sigcontext */ #if __POSIX_VISIBLE struct __siginfo; /* * Signal vector "template" used in sigaction call. */ struct sigaction { union { void (*__sa_handler) (int); void (*__sa_sigaction) (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 */ #endif /* __POSIX_VISIBLE */ #if __XSI_VISIBLE #define sa_sigaction __sigaction_u.__sa_sigaction #endif #if __XSI_VISIBLE #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 */ #endif #if __BSD_VISIBLE #define NSIG 64 /* size of sigptbl */ /* Additional FreeBSD values. */ #define SI_UNDEFINED 0 typedef void __siginfohandler_t (int, siginfo_t *, void *); typedef __sighandler_t *sig_t; /* type of pointer to a signal function */ #endif #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 */ #ifdef _KERNEL #include <sys/ucontext.h> #elif __POSIX_VISIBLE >= 200112 || __XSI_VISIBLE #include <sys/_ucontext.h> #endif #if __BSD_VISIBLE /* * 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! */ /* * Macro for converting signal number to a mask suitable for * sigblock(). */ #define sigmask(m) (1 << ((m)-1)) #define BADSIG SIG_ERR #endif /* __BSD_VISIBLE */ #if __POSIX_VISIBLE /* * 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 /* * For historical reasons, programs expect signal's return value to be * defined by <sys/signal.h>. */ __BEGIN_DECLS __sighandler_t *signal(int, __sighandler_t *); #if __BSD_VISIBLE int sigblockall(void); int sigunblockall(void); #endif __END_DECLS #endif /* !_SYS_SIGNAL_H_ */
