NAME

sigsetmask − set current signal mask

SYNOPSIS

#include <signal.h>
 sigsetmask(mask);
int mask;
 mask = sigmask(signum)

DESCRIPTION

Sigsetmask sets the current signal mask (those signals that are blocked from delivery).  Signals are blocked if the corresponding bit in mask is a 1; the macro sigmask is provided to construct the mask for a given signum.

The system quietly disallows SIGKILL, SIGSTOP, or SIGCONT to be blocked. 

RETURN VALUE

The previous set of masked signals is returned. 

SEE ALSO

kill(2), sigvec(2), sigblock(2), sigpause(2)

4.2 Berkeley Distribution  —  May 14, 1986