Name

sigblock − block signals

Syntax

sigblock(mask)
int mask;

Description

The sigblock system call causes the signals specified in mask to be added to the set of signals currently being blocked from delivery.  Signal i is blocked if the ith bit in mask is a 1. 

It is not possible to block SIGKILL, SIGSTOP, or SIGCONT.  This restriction is silently imposed by the system. 

The previous set of masked signals is returned. 

See Also

kill(2), sigsetmask(2), sigvec(2)