.TH SIGSETMASK 2 "7 July 1983" .UC 4 .SH NAME sigsetmask \- set current signal mask .SH SYNOPSIS .nf .B sigsetmask(mask); .B int mask; .SH DESCRIPTION .I Sigsetmask sets the current signal mask (those signals which are blocked from delivery). Signal .I i is blocked if the .IR i -th bit in .I mask is a 1. .PP The system quietly disallows SIGKILL, SIGSTOP, or SIGCONT to be blocked. .SH "RETURN VALUE The previous set of masked signals is returned. .SH "SEE ALSO" kill(2), sigvec(2), sigblock(2), sigpause(2)