/* Copyright (c) 1982, 1986, 1993 The Regents of the University of California. All rights reserved. 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. */ /* sys/signal.h */ #ifndef _SYS_SIGNAL_H #define _SYS_SIGNAL_H #ifdef __cplusplus extern "C" { #endif #include "_ansi.h" #include #include #include #include #include #include #if !defined(_SIGSET_T_DECLARED) #define _SIGSET_T_DECLARED typedef __sigset_t sigset_t; #endif #if defined(__CYGWIN__) #include #else #if defined(_POSIX_REALTIME_SIGNALS) || __POSIX_VISIBLE >= 199309 /* sigev_notify values NOTE: P1003.1c/D10, p. 34 adds SIGEV_THREAD. */ #define SIGEV_NONE 1 /* No asynchronous notification shall be delivered */ /* when the event of interest occurs. */ #define SIGEV_SIGNAL 2 /* A queued signal, with an application defined */ /* value, shall be delivered when the event of */ /* interest occurs. */ #define SIGEV_THREAD 3 /* A notification function shall be called to */ /* perform notification. */ /* Signal Generation and Delivery, P1003.1b-1993, p. 63 NOTE: P1003.1c/D10, p. 34 adds sigev_notify_function and sigev_notify_attributes to the sigevent structure. */ union sigval { int sival_int; /* Integer signal value */ void *sival_ptr; /* Pointer signal value */ }; struct sigevent { int sigev_notify; /* Notification type */ int sigev_signo; /* Signal number */ union sigval sigev_value; /* Signal value */ }; /* Signal Actions, P1003.1b-1993, p. 64 */ /* si_code values, p. 66 */ #define SI_USER 1 /* Sent by a user. kill(), abort(), etc */ #define SI_QUEUE 2 /* Sent by sigqueue() */ #define SI_TIMER 3 /* Sent by expiration of a timer_settime() timer */ #define SI_ASYNCIO 4 /* Indicates completion of asycnhronous IO */ #define SI_MESGQ 5 /* Indicates arrival of a message at an empty queue */ typedef struct { int si_signo; /* Signal number */ int si_code; /* Cause of the signal */ union sigval si_value; /* Signal value */ } siginfo_t; #endif /* defined(_POSIX_REALTIME_SIGNALS) || __POSIX_VISIBLE >= 199309 */ #if defined(__rtems__) /* 3.3.8 Synchronously Accept a Signal, P1003.1b-1993, p. 76 */ #define SA_NOCLDSTOP 0x1 /* Do not generate SIGCHLD when children stop */ #define SA_SIGINFO 0x2 /* Invoke the signal catching function with */ /* three arguments instead of one. */ #if __BSD_VISIBLE || __XSI_VISIBLE >= 4 || __POSIX_VISIBLE >= 200809 #define SA_ONSTACK 0x4 /* Signal delivery will be on a separate stack. */ #endif /* struct sigaction notes from POSIX: * * (1) Routines stored in sa_handler should take a single int as * their argument although the POSIX standard does not require this. * This is not longer true since at least POSIX.1-2008 * (2) The fields sa_handler and sa_sigaction may overlap, and a conforming * application should not use both simultaneously. */ typedef void (*_sig_func_ptr)(int); struct sigaction { int sa_flags; /* Special flags to affect behavior of signal */ sigset_t sa_mask; /* Additional set of signals to be blocked */ /* during execution of signal-catching */ /* function. */ union { _sig_func_ptr _handler; /* SIG_DFL, SIG_IGN, or pointer to a function */ #if defined(_POSIX_REALTIME_SIGNALS) void (*_sigaction)( int, siginfo_t *, void * ); #endif } _signal_handlers; }; #define sa_handler _signal_handlers._handler #if defined(_POSIX_REALTIME_SIGNALS) #define sa_sigaction _signal_handlers._sigaction #endif #else /* defined(__rtems__) */ #define SA_NOCLDSTOP 1 /* only value supported now for sa_flags */ typedef void (*_sig_func_ptr)(int); struct sigaction { _sig_func_ptr sa_handler; sigset_t sa_mask; int sa_flags; }; #endif /* defined(__rtems__) */ #endif /* defined(__CYGWIN__) */ #if __BSD_VISIBLE || __XSI_VISIBLE >= 4 || __POSIX_VISIBLE >= 200809 /* * Minimum and default signal stack constants. Allow for target overrides * from . */ #ifndef MINSIGSTKSZ #define MINSIGSTKSZ 2048 #endif #ifndef SIGSTKSZ #define SIGSTKSZ 8192 #endif /* * Possible values for ss_flags in stack_t below. */ #define SS_ONSTACK 0x1 #define SS_DISABLE 0x2 #endif /* * Structure used in sigaltstack call. */ typedef struct sigaltstack { void *ss_sp; /* Stack base or pointer. */ int ss_flags; /* Flags. */ size_t ss_size; /* Stack size. */ } stack_t; #if __POSIX_VISIBLE #define SIG_SETMASK 0 /* set mask with sigprocmask() */ #define SIG_BLOCK 1 /* set of signals to block */ #define SIG_UNBLOCK 2 /* set of signals to, well, unblock */ int sigprocmask (int, const sigset_t *, sigset_t *); #endif #if __POSIX_VISIBLE >= 199506 int pthread_sigmask (int, const sigset_t *, sigset_t *); #endif #if __POSIX_VISIBLE int kill (pid_t, int); #endif #if __BSD_VISIBLE || __XSI_VISIBLE >= 4 int killpg (pid_t, int); #endif #if __POSIX_VISIBLE int sigaction (int, const struct sigaction *, struct sigaction *); int sigaddset (sigset_t *, const int); int sigdelset (sigset_t *, const int); int sigismember (const sigset_t *, int); int sigfillset (sigset_t *); int sigemptyset (sigset_t *); int sigpending (sigset_t *); int sigsuspend (const sigset_t *); int sigwait (const sigset_t *, int *); #if !defined(__CYGWIN__) && !defined(__rtems__) /* These depend upon the type of sigset_t, which right now is always a long.. They're in the POSIX namespace, but are not ANSI. */ #define sigaddset(what,sig) (*(what) |= (1<<(sig)), 0) #define sigdelset(what,sig) (*(what) &= ~(1<<(sig)), 0) #define sigemptyset(what) (*(what) = 0, 0) #define sigfillset(what) (*(what) = ~(0), 0) #define sigismember(what,sig) (((*(what)) & (1<<(sig))) != 0) #endif /* !__CYGWIN__ && !__rtems__ */ #endif /* __POSIX_VISIBLE */ /* There are two common sigpause variants, both of which take an int argument. If you request _XOPEN_SOURCE or _GNU_SOURCE, you get the System V version, which removes the given signal from the process's signal mask; otherwise you get the BSD version, which sets the process's signal mask to the given value. */ #if __XSI_VISIBLE && !defined(__INSIDE_CYGWIN__) # ifdef __GNUC__ int sigpause (int) __asm__ (__ASMNAME ("__xpg_sigpause")); # else int __xpg_sigpause (int); # define sigpause __xpg_sigpause # endif #elif __BSD_VISIBLE int sigpause (int); #endif #if __BSD_VISIBLE || __XSI_VISIBLE >= 4 || __POSIX_VISIBLE >= 200809 int sigaltstack (const stack_t *__restrict, stack_t *__restrict); #endif #if __POSIX_VISIBLE >= 199309 /* 3.3.8 Synchronously Accept a Signal, P1003.1b-1993, p. 76 NOTE: P1003.1c/D10, p. 39 adds sigwait(). */ int sigwaitinfo (const sigset_t *, siginfo_t *); int sigtimedwait (const sigset_t *, siginfo_t *, const struct timespec *); /* 3.3.9 Queue a Signal to a Process, P1003.1b-1993, p. 78 */ int sigqueue (pid_t, int, const union sigval); #endif /* __POSIX_VISIBLE >= 199309 */ /* Using __MISC_VISIBLE until POSIX Issue 8 is officially released */ #if __MISC_VISIBLE /* POSIX Issue 8 adds sig2str() and str2sig() */ #if __SIZEOF_INT__ >= 4 #define SIG2STR_MAX 17 /* (sizeof("RTMAX+") + sizeof("4294967295") - 1) */ #else #define SIG2STR_MAX 12 /* (sizeof("RTMAX+") + sizeof("65535") - 1) */ #endif int sig2str(int, char *); int str2sig(const char *__restrict, int *__restrict); #endif /* __MISC_VISIBLE */ #if defined(___AM29K__) /* These all need to be defined for ANSI C, but I don't think they are meaningful. */ #define SIGABRT 1 #define SIGFPE 1 #define SIGILL 1 #define SIGINT 1 #define SIGSEGV 1 #define SIGTERM 1 /* These need to be defined for POSIX, and some others do too. */ #define SIGHUP 1 #define SIGQUIT 1 #define NSIG 2 #elif defined(__GO32__) #define SIGINT 1 #define SIGKILL 2 #define SIGPIPE 3 #define SIGFPE 4 #define SIGHUP 5 #define SIGTERM 6 #define SIGSEGV 7 #define SIGTSTP 8 #define SIGQUIT 9 #define SIGTRAP 10 #define SIGILL 11 #define SIGEMT 12 #define SIGALRM 13 #define SIGBUS 14 #define SIGLOST 15 #define SIGSTOP 16 #define SIGABRT 17 #define SIGUSR1 18 #define SIGUSR2 19 #define NSIG 20 #elif !defined(SIGTRAP) #define SIGHUP 1 /* hangup */ #define SIGINT 2 /* interrupt */ #define SIGQUIT 3 /* quit */ #define SIGILL 4 /* illegal instruction (not reset when caught) */ #define SIGTRAP 5 /* trace trap (not reset when caught) */ #define SIGIOT 6 /* IOT instruction */ #define SIGABRT 6 /* used by abort, replace SIGIOT in the future */ #define SIGEMT 7 /* EMT instruction */ #define SIGFPE 8 /* floating point exception */ #define SIGKILL 9 /* kill (cannot be caught or ignored) */ #define SIGBUS 10 /* bus error */ #define SIGSEGV 11 /* segmentation violation */ #define SIGSYS 12 /* bad argument to system call */ #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 */ #if defined(__rtems__) #define SIGURG 16 /* urgent condition on IO channel */ #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 SIGCLD 20 /* System V name for SIGCHLD */ #define SIGTTIN 21 /* to readers pgrp upon background tty read */ #define SIGTTOU 22 /* like TTIN for output if (tp->t_local<OSTOP) */ #define SIGIO 23 /* input/output possible signal */ #define SIGPOLL SIGIO /* System V name for SIGIO */ #define SIGWINCH 24 /* window changed */ #define SIGUSR1 25 /* user defined signal 1 */ #define SIGUSR2 26 /* user defined signal 2 */ /* Real-Time Signals Range, P1003.1b-1993, p. 61 NOTE: By P1003.1b-1993, this should be at least RTSIG_MAX (which is a minimum of 8) signals. */ #define SIGRTMIN 27 #define SIGRTMAX 31 #define __SIGFIRSTNOTRT SIGHUP #define __SIGLASTNOTRT SIGUSR2 #define NSIG 32 /* signal 0 implied */ #elif defined(__svr4__) /* svr4 specifics. different signals above 15, and sigaction. */ #define SIGUSR1 16 #define SIGUSR2 17 #define SIGCLD 18 #define SIGPWR 19 #define SIGWINCH 20 #define SIGPOLL 22 /* 20 for x.out binaries!!!! */ #define SIGSTOP 23 /* sendable stop signal not from tty */ #define SIGTSTP 24 /* stop signal from tty */ #define SIGCONT 25 /* continue a stopped process */ #define SIGTTIN 26 /* to readers pgrp upon background tty read */ #define SIGTTOU 27 /* like TTIN for output if (tp->t_local<OSTOP) */ #define NSIG 28 #else #define SIGURG 16 /* urgent condition on IO channel */ #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 SIGCLD 20 /* System V name for SIGCHLD */ #define SIGTTIN 21 /* to readers pgrp upon background tty read */ #define SIGTTOU 22 /* like TTIN for output if (tp->t_local<OSTOP) */ #define SIGIO 23 /* input/output possible signal */ #define SIGPOLL SIGIO /* System V name for SIGIO */ #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 changed */ #define SIGLOST 29 /* resource lost (eg, record-lock lost) */ #define SIGUSR1 30 /* user defined signal 1 */ #define SIGUSR2 31 /* user defined signal 2 */ #define NSIG 32 /* signal 0 implied */ #endif #endif #ifdef __cplusplus } #endif #if defined(__CYGWIN__) #if __XSI_VISIBLE >= 4 || __POSIX_VISIBLE >= 200809 #include #endif #endif #ifndef _SIGNAL_H_ /* Some applications take advantage of the fact that * and are equivalent in glibc. Allow for that here. */ #include #endif #endif /* _SYS_SIGNAL_H */