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.\"     @(#)sigblock.2	6.7 (Berkeley) 3/10/91
.\"
.\" Modified Sat Jul 24 10:09:15 1993 by Rik Faith (faith@cs.unc.edu)
.\" Modified Fri Aug 11 1995 by Stephen Lee (sl14@cornell.edu)
.\" German translation by René Tschirley (gremlin@cs.tu-berlin.de)
.\""
.TH SIGBLOCK 2 "11. August 1995" "BSD Man Page" "Systemaufrufe"
.SH BEZEICHNUNG
sigblock, siggetmask, sigsetmask, sigmask \- Manipulation von Signalmasken
.SH ÜBERSICHT
.B #include <signal.h>
.sp
.BI "int sigblock(int " mask );
.br
.B int siggetmask(void);
.br
.BI "int sigsetmask(int " mask );
.br
.BI "int sigmask(" signum );
.SH BESCHREIBUNG
Dieses Interface kann veraltet sein durch:
.BR sigprocmask (2).

.B Sigblock()
fügt die Signale in
.I mask
der Liste der zu blockierenden Signale hinzu.

.B sigsetmask()
ersetzt die Liste der zu blockierenden Signale mit dem Argument
.IR mask .

Signale werden blockiert, wenn das zugehörige Bit in
.I mask
auf 1 gesetzt ist; das Makro
.B sigmask
ermöglicht die Konstruktion von Masken für eine gegebene Signalnummer
.IR signum .

Es ist nicht möglich,
.B SIGKILL
oder
.BR SIGSTOP 
zu blockieren; Versuche werden vom System stillschweigend unterdrückt.

Die augenblickliche Liste der zu blockierenden Signale kann durch
.BR siggetmask()
erfragt werden.
.SH "RÜCKGABEWERTE"
.B Siggetmask()
liefert die Menge der augenblicklich zu maskierenden Signale.

.B Sigsetmask() 
und
.B sigblock()
liefern die vorherigen Menden der maskierten Signale.
.SH ENTWICKLUNG
Diese Funktionen erschienen in BSD 4.3 und wurden mißbilligt.

.SH "SIEHE AUCH"
.BR kill (2),
.BR sigprocmask (2),
.BR siggetops (3).