Copyright (C) 1994, Digital Equipment Corp. INTERFACE** <signal.h> **Usignal ; FROM Ctypes IMPORT int, char, short, long;
CONST SIGHUP = 1; (* hangup *) SIGINT = 2; (* interrupt *) SIGQUIT = 3; (* quit *) SIGILL = 4; (* illegal instruction (not reset when caught) *)
Not on hp300 ILL_RESAD_FAULT = 0; (* reserved addressing fault
ILL_PRIVIN_FAULT = 1; (* privileged instruction fault *) ILL_RESOP_FAULT = 2; (* reserved operand fault *) (* CHME, CHMS, CHMU are not yet given back to users reasonably *) *) SIGTRAP = 5; (* trace trap (not reset when caught) *) SIGIOT = 6; (* IOT instruction *) SIGEMT = 7; (* EMT instruction *) SIGFPE = 8; (* floating point exception *)
Not on hp300 FPE_INTOVF_TRAP = 1; (* integer overflow
FPE_INTDIV_TRAP = 2; (* integer divide by zero *) FPE_FLTOVF_TRAP = 3; (* floating overflow *) FPE_FLTDIV_TRAP = 4; (* floating/decimal divide by zero *) FPE_FLTUND_TRAP = 5; (* floating underflow *) FPE_DECOVF_TRAP = 6; (* decimal overflow *) FPE_SUBRNG_TRAP = 7; (* subscript out of range *) FPE_FLTOVF_FAULT = 8; (* floating overflow fault *) FPE_FLTDIV_FAULT = 9; (* divide by zero floating fault *) FPE_FLTUND_FAULT = 10; (* floating underflow fault *) *) SIGKILL = 9; (* kill (cannot be caught or ignored) *) SIGBUS = 10; (* bus error *) SIGSEGV = 11; (* segmentation violation *) SIGSYS = 12; (* bad argument to system call *) SIGPIPE = 13; (* write on a pipe with no one to read it *) SIGALRM = 14; (* alarm clock *) SIGTERM = 15; (* software termination signal from kill *) SIGUSR1 = 16; (* user defined signal 1 *) SIGUSR2 = 17; (* user defined signal 2 *) SIGCHLD = 18; (* Child process terminated or stopped *) SIGPWR = 19; (* power state indication *) SIGVTALRM = 20 ; (* virtual timer alarm *) SIGPROF = 21; (* profiling timer alarm *) SIGIO = 22; (* asynchronous I/O *) SIGWINDOW = 23 ; (* windowing signal *) SIGSTOP = 24; (* Stop signal (cannot be caught or ignored) *) SIGTSTP = 25; (* Interactive stop signal *) SIGCONT = 26; (* Continue if stopped *) SIGTTIN = 27; (* Read from control terminal attempted by a member of a background process group *) SIGTTOU = 28; (* Write to control terminal attempted by a member of a background process group *) SIGURG = 29; (* urgent condition on IO channel *) SIGLOST = 30; (* remote lock lost (NFS) *) (* Save for future use *) SIGDIL = 32; (* DIL signal *) NSIG = 33; (* Highest signal number + 1 *) (* System V definitions *) SIGCLD = SIGCHLD; SIGABRT = SIGIOT;Signal vector
template
used in sigvec call.
TYPE SignalHandler = PROCEDURE (sig, code: int; scp: UNTRACED REF struct_sigcontext); struct_sigset = RECORD sigset: ARRAY [1..8] OF long; END; sigset_t = struct_sigset; struct_sigaction = RECORD sa_handler: SignalHandler; (* signal handler *) sa_mask: sigset_t; (* signal mask to apply *) sa_flags: int; (* see signal options below *) END; struct_sigvec = RECORD sv_handler: SignalHandler; (* signal handler *) sv_mask: int; (* signal mask to apply *) sv_flags: int; (* see signal options below *) END; CONST empty_sigset_t = sigset_t {sigset := ARRAY [1..8] OF long {0, ..}}; empty_sv_mask : int = 0; CONST SV_ONSTACK = 16_0001; (* take signal on signal stack *) SA_ONSTACK = SV_ONSTACK; SV_INTERRUPT = 16_0002; (* do not restart system on signal return *) SA_NOCLDSTOP = 16_0008; (* Don't generate SIGCLD when children stop *) SV_OLDSIG = 16_1000; (* Emulate old signal() for POSIX *) SA_RESETHAND = 16_0004; (* Reset after catching *) (* Defines for sigprocmask() call. POSIX. *) SIG_BLOCK = 0; (* Add these signals to block mask *) SIG_UNBLOCK = 1; (* Remove these signals from block mask *) SIG_SETMASK = 2; (* Set block mask to this mask *) TYPE struct_sigstack = RECORD ss_sp: ADDRESS; (* signal stack pointer *) ss_onstack: int; (* current status *) END;
* 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 properly restore state if * a non-standard exit is performed. * * XXX - sigcontext needs updating per 4.3BSD - rr *
TYPE struct_sigcontext = RECORD sc_syscall: int; (* interrupted system call if any *) sc_syscall_action: char ; (* what to do after system call *) sc_pad1: char; sc_pad2: char; sc_onstack: char; (* sigstack state to restore *) sc_mask: int; (* signal mask to restore *) sc_sp: int; (* sp to restore *) sc_ps: int; (* ps to restore *) sc_pc: short; (* pc to retore *) END;Do not modifiy these variables
read-only
VAR BADSIG, SIG_ERR, SIG_DFL, SIG_IGN: SignalHandler;Convert a signal number to a mask suitable for sigblock().
<*INLINE*> PROCEDURE sigmask (n: int): int;** kill(2) - send signal to a process **
<*EXTERNAL*> PROCEDURE kill (pid, sig: int): int;** killpg(2) - send signal to a process or process group **
<*EXTERNAL*> PROCEDURE killpg (pgrp, sig: int): int;** sigblock(2) - block signals **
<*EXTERNAL*> PROCEDURE sigblock (mask: int): int;** sigpause(2) - atomically release blocked signals and wait for interrupt **
<*EXTERNAL*> PROCEDURE sigpause (sigmask: int): int;** sigpending(2) - examine pending signals **
<*EXTERNAL*> PROCEDURE sigpending (VAR set: sigset_t): int;** sigsetmask(2) - set current signal mask **
<*EXTERNAL*> PROCEDURE sigsetmask (mask: int): int;** sigstack(2) - set and/or get signal stack context **
<*EXTERNAL*> PROCEDURE sigstack (VAR ss, oss: struct_sigstack): int;** sigvec(2) - software signal facilities **
<*EXTERNAL*> PROCEDURE sigvec (sig: int; VAR vec, ovec: struct_sigvec): int; END Usignal.