/* * Copyright (c) 1982, 1986, 1989 Regents of the University of California. * All rights reserved. * * Redistribution is only permitted until one year after the first shipment * of 4.4BSD by the Regents. Otherwise, redistribution and use in source and * binary forms are permitted provided that: (1) source distributions retain * this entire copyright notice and comment, and (2) distributions including * binaries display the following acknowledgement: This product includes * software developed by the University of California, Berkeley and its * contributors'' in the documentation or other materials provided with the * distribution and in all advertising materials mentioning features or use * of this software. 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 AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. * * @(#)signal.h 7.11 (Berkeley) 7/1/90 */ #ifndef _SIGNAL_H #define _SIGNAL_H #include #define NSIG 33 /* counting 0; max = 33 (mask is 1-32) */ #ifndef _POSIX_SOURCE #include /* codes for SIGILL, SIGFPE */ #endif /* _POSIX_SOURCE */ #define SIGHUP 1 /* hangup */ #define SIGINT 2 /* interrupt */ #define SIGQUIT 3 /* quit */ #define SIGILL 4 /* illegal instruction (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 /* bad argument to system call */ #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 for output 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 */ #define SIGMSG 32 /* an AmigaDOS signal has been set. SIGMSG is normally ignored. (code is the mask of new signals) */ #include #ifndef _POSIX_SOURCE typedef void (*sig_t)(int); #endif #if 0 #ifndef _KERNEL void (*signal())(); #endif #endif typedef unsigned int sigset_t; __BEGIN_DECLS int sigaddset __P((sigset_t *, int)); int sigdelset __P((sigset_t *, int)); int sigemptyset __P((sigset_t *)); int sigfillset __P((sigset_t *)); int sigismember __P((const sigset_t *, int)); __END_DECLS #define sigemptyset(set) ( *(set) = 0 ) #define sigfillset(set) ( *(set) = ~(sigset_t)0, 0 ) #define sigaddset(set, signo) ( *(set) |= 1 << ((signo) - 1), 0) #define sigdelset(set, signo) ( *(set) &= ~(1 << ((signo) - 1)), 0) #define sigismember(set, signo) ( (*(set) & (1 << ((signo) - 1))) != 0) /* * Signal vector "template" used in sigaction call. */ struct sigaction { void (*sa_handler)(); /* signal handler */ sigset_t sa_mask; /* signal mask to apply */ int sa_flags; /* see signal options below */ }; #ifndef _POSIX_SOURCE #define SA_ONSTACK 0x0001 /* take signal on signal stack */ #define SA_RESTART 0x0002 /* do not restart system on signal return */ #endif #define SA_NOCLDSTOP 0x0004 /* do not generate SIGCHLD on child stop */ /* * 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 */ #ifndef _POSIX_SOURCE /* * 4.3 compatibility: * Signal vector "template" used in sigvec call. */ struct sigvec { void (*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_onstack sv_flags /* isn't compatibility wonderful! */ /* * Structure used in sigaltstack call. */ struct sigaltstack { char *ss_base; /* signal stack base */ int ss_len; /* signal stack length */ int ss_onstack; /* current status */ }; /* * Structure used in sigstack call. */ struct sigstack { char *ss_sp; /* signal stack pointer */ int ss_onstack; /* current status */ }; /* * Information pushed on stack when a signal is delivered. * This is used by the kernel to restore state following * execution of the signal handler. It is also made available * to the handler to allow it to restore state properly if * a non-standard exit is performed. */ struct sigcontext { int sc_onstack; /* sigstack state to restore */ int sc_mask; /* signal mask to restore */ int sc_sp; /* sp to restore */ int sc_fp; /* fp to restore */ int sc_ap; /* ap to restore */ int sc_pc; /* pc to restore */ int sc_ps; /* psl to restore */ }; /* * Macro for converting signal number to a mask suitable for * sigblock(). */ #define sigmask(m) (1 << ((m)-1)) #define BADSIG (void (*)())-1 #endif /* _POSIX_SOURCE */ #ifdef _KERNEL #define SIG_CATCH (void (*)())2 #define SIG_HOLD (void (*)())3 #define sigcantmask (sigmask(SIGKILL)|sigmask(SIGSTOP)) /* * get signal action for process and signal; currently only for current process */ #define SIGACTION(p, sig) (u.u_signal[(sig)]) /* * Determine signal that should be delivered to process p, the current process, * 0 if none. If there is a pending stop signal with default action, * the process stops in issig(). */ #define CURSIG(p) \ (((p)->p_sig == 0 || \ (((p)->p_flag&STRC) == 0 && ((p)->p_sig &~ (p)->p_sigmask) == 0)) ? \ 0 : issig(p)) /* * Clear a pending signal from a process. */ #define CLRSIG(p, sig) { (p)->p_sig &= ~sigmask(sig); } #endif #define SIG_ERR (void (*)(int))-1 #define SIG_DFL (void (*)(int))0 #define SIG_IGN (void (*)(int))1 #include __BEGIN_DECLS void (*signal __P((int, void (*) __P((int))))) __P((int)); int raise __P((int)); #ifndef _ANSI_SOURCE int kill __P((pid_t, int)); int sigaction __P((int, const struct sigaction *, struct sigaction *)); int sigpending __P((sigset_t *)); int sigprocmask __P((int, const sigset_t *, sigset_t *)); int sigsuspend __P((const sigset_t *)); #endif /* !_ANSI_SOURCE */ #if !defined(_ANSI_SOURCE) && !defined(_POSIX_SOURCE) int killpg __P((pid_t, int)); void psignal __P((unsigned, const char *)); #ifndef _KERNEL int sigblock __P((int)); int sigsetmask __P((int)); int sigreturn __P((struct sigcontext *)); int sigpause __P((int)); #endif int siginterrupt __P((int, int)); int sigstack __P((const struct sigstack *, struct sigstack *)); int sigvec __P((int, struct sigvec *, struct sigvec *)); #endif /* !_ANSI_SOURCE && !_POSIX_SOURCE */ __END_DECLS #endif /* _SIGNAL_H */