/* sys/signal.h */ #ifndef _SYS_SIGNAL_H #define _SYS_SIGNAL_H #ifdef __cplusplus extern "C" { #endif #include "_ansi.h" #include /* #ifndef __STRICT_ANSI__*/ #if defined(_POSIX_THREADS) #include /* for pthread data types */ #endif typedef unsigned long sigset_t; #if defined(__rtems__) #if defined(_POSIX_REALTIME_SIGNALS) /* 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 */ #if defined(_POSIX_THREADS) void (*sigev_notify_function)( union sigval ); /* Notification function */ pthread_attr_t *sigev_notify_attributes; /* Notification Attributes */ #endif }; /* 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 /* 3.3.8 Synchronously Accept a Signal, P1003.1b-1993, p. 76 */ #define SA_NOCLDSTOP 1 /* Do not generate SIGCHLD when children stop */ #define SA_SIGINFO 2 /* Invoke the signal catching function with */ /* three arguments instead of one. */ /* struct sigaction notes from POSIX: * * (1) Routines stored in sa_handler should take a single int as * there argument although the POSIX standard does not require this. * (2) The fields sa_handler and sa_sigaction may overlap, and a conforming * application should not use both simultaneously. */ 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 { void (*_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 struct sigaction { void (*sa_handler)(int); sigset_t sa_mask; int sa_flags; }; #define SA_NOCLDSTOP 1 /* only value supported now for sa_flags */ #ifdef __CYGWIN__ # define SA_RESTART 0x10000000 /* Restart syscall on signal return. */ # define SA_NODEFER 0x40000000 /* Don't automatically block the signal when its handler is being executed. */ # define SA_RESETHAND 0x80000000 /* Reset to SIG_DFL on entry to handler. */ #endif #endif /* defined(__rtems__) */ #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 */ /* 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))) #define sigemptyset(what) (*(what) = 0) int _EXFUN(sigprocmask, (int how, const sigset_t *set, sigset_t *oset)); #if defined(_POSIX_THREADS) int _EXFUN(pthread_sigmask, (int how, const sigset_t *set, sigset_t *oset)); #endif /* protos for functions found in winsup sources for CYGWIN */ #if defined(__CYGWIN__) || defined(__rtems__) #undef sigaddset #undef sigemptyset /* The first argument to kill should be pid_t. Right now always defines pid_t to be int. If that ever changes, then we will need to do something else, perhaps along the lines of . */ int _EXFUN(kill, (int, int)); int _EXFUN(killpg, (pid_t, int)); int _EXFUN(sigaction, (int, const struct sigaction *, struct sigaction *)); int _EXFUN(sigaddset, (sigset_t *, const int)); int _EXFUN(sigdelset, (sigset_t *, const int)); int _EXFUN(sigismember, (const sigset_t *, int)); int _EXFUN(sigfillset, (sigset_t *)); int _EXFUN(sigemptyset, (sigset_t *)); int _EXFUN(sigpending, (sigset_t *)); int _EXFUN(sigsuspend, (const sigset_t *)); int _EXFUN(sigpause, (int)); #if defined(_POSIX_THREADS) int _EXFUN(pthread_kill, (pthread_t thread, int sig)); #endif #if defined(_POSIX_REALTIME_SIGNALS) /* 3.3.8 Synchronously Accept a Signal, P1003.1b-1993, p. 76 NOTE: P1003.1c/D10, p. 39 adds sigwait(). */ int _EXFUN(sigwaitinfo, (const sigset_t *set, siginfo_t *info)); int _EXFUN(sigtimedwait, (const sigset_t *set, siginfo_t *info, const struct timespec *timeout) ); int _EXFUN(sigwait, (const sigset_t *set, int *sig)); /* 3.3.9 Queue a Signal to a Process, P1003.1b-1993, p. 78 */ int _EXFUN(sigqueue, (pid_t pid, int signo, const union sigval value)); #endif /* defined(_POSIX_REALTIME_SIGNALS) */ #endif /* defined(__CYGWIN__) || defined(__rtems__) */ /* #endif __STRICT_ANSI__ */ #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(__CYGWIN__) /* BSD signals semantics */ #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 SIGABRT 6 /* used by abort */ #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 */ #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 */ #else #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 SIGUSR1 16 /* reserved as application defined signal 1 */ #define SIGUSR2 17 /* reserved as application defined signal 2 */ #define __SIGFIRSTNOTRT SIGHUP #define __SIGLASTNOTRT SIGUSR2 /* RTEMS does not support job control, hence no Job Control Signals are defined per P1003.1b-1993, p. 60-61. RTEMS does not support memory protection, hence no Memory Protection Signals are defined per P1003.1b-1993, p. 60-61. */ /* 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 18 #define SIGRTMAX 32 #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 #endif /* _SYS_SIGNAL_H */