Copyright (C) 1994, Digital Equipment Corp.
INTERFACE** <signal.h> **Usignal ; FROM Ctypes IMPORT int;
CONST
SIGHUP = 1; (* hangup *)
SIGINT = 2; (* interrupt *)
SIGQUIT = 3; (* quit *)
SIGILL = 4; (* illegal instruction (not reset when caught) *)
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 *)
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 *)
SIGURG = 16; (* urgent condition on IO channel *)
SIGSTOP = 17; (* sendable stop signal not from tty *)
SIGTSTP = 18; (* stop signal from tty *)
SIGCONT = 19; (* continue a stopped process *)
SIGCHLD = 20; (* to parent on child stop or exit *)
SIGTTIN = 21; (* to readers pgrp upon background tty read *)
SIGTTOU = 22; (* like TTIN for output if (tp->t_local<OSTOP) *)
SIGIO = 23; (* input/output possible signal *)
SIGXCPU = 24; (* exceeded CPU time limit *)
SIGXFSZ = 25; (* exceeded file size limit *)
SIGVTALRM = 26; (* virtual time alarm *)
SIGPROF = 27; (* profiling time alarm *)
SIGWINCH = 28; (* window size changes *)
SIGLOST = 29; (* Sys-V rec lock: notify user upon server crash *)
SIGUSR1 = 30; (* User signal 1 (from SysV) *)
SIGUSR2 = 31; (* User signal 2 (from SysV) *)
(* 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);
sigset_t = int;
struct_sigvec = RECORD
sv_handler: SignalHandler; (* signal handler *)
sv_mask: sigset_t; (* signal mask to apply *)
sv_flags: int; (* see signal options below *) END;
CONST
empty_sigset_t : sigset_t = 0;
empty_sv_mask : sigset_t = 0;
CONST
SV_ONSTACK = 16_0001; (* take signal on signal stack *)
SV_INTERRUPT = 16_0002; (* do not restart system on signal return *)
SA_NOCLDSTOP = 16_0004; (* Don't generate SIGCLD when children stop *)
SV_OLDSIG = 16_1000; (* Emulate old signal() for POSIX *)
(* Defines for sigprocmask() call. POSIX. *)
SIG_BLOCK = 1; (* Add these signals to block mask *)
SIG_UNBLOCK = 2; (* Remove these signals from block mask *)
SIG_SETMASK = 3; (* 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_onstack: int; (* sigstack state to restore *)
sc_mask: int; (* signal mask to restore *)
sc_sp: int; (* sp to restore *)
sc_pc: int; (* pc to retore *)
sc_ps: int; (* psl to restore *)
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.