/* sys/signal.h */ #ifndef _SYS_SIGNAL_H #define _SYS_SIGNAL_H #ifdef __cplusplus extern "C" { #endif #include "_ansi.h" #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 */ #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 /* 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 how, const sigset_t *set, sigset_t *oset); #endif #if __POSIX_VISIBLE >= 199506 int pthread_sigmask (int how, const sigset_t *set, sigset_t *oset); #endif #ifdef _COMPILING_NEWLIB int _kill (pid_t, int); #endif /* _COMPILING_NEWLIB */ #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 *set, int *sig); #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 >= 199506 int pthread_kill (pthread_t thread, int sig); #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 *set, siginfo_t *info); int sigtimedwait (const sigset_t *set, siginfo_t *info, const struct timespec *timeout); /* 3.3.9 Queue a Signal to a Process, P1003.1b-1993, p. 78 */ int sigqueue (pid_t pid, int signo, const union sigval value); #endif /* __POSIX_VISIBLE >= 199309 */ #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 */