NAME

sigblock − block signals

SYNOPSIS

long sigblock(mask);
long mask;

HP-UX COMPATIBILITY

Level: HP-UX/STANDARD

Origin: UCB

DESCRIPTION

Sigblock 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 (that is, if (mask & (1L << (i-1))) != 0 ). 

It is not possible to block those signals which cannot be ignored, as documented in signal(2); this restriction is silently imposed by the system.

Sigsetmask(2) can be used to set the mask absolutely.

RETURN VALUE

The previous set of masked signals is returned. 

SEE ALSO

kill(2), sigvector(2), sigsetmask(2), sigpause(2)

Hewlett-Packard  —  last mod. May 11, 2021