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 i-th 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)

System Calls