NAME

sigsetmask − set current signal mask

SYNOPSIS

#include <signal.h>

long sigsetmask(long mask);

DESCRIPTION

sigsetmask() sets the current signal mask (those signals that are blocked from delivery).  Signal i is blocked if the i-th bit in mask, as specified with the macro sigmask(i), is a 1. 

It is not possible to mask signals that cannot be ignored, as documented in signal(5); this restriction is silently imposed by the system.

sigblock() can be used to add elements to the set of blocked signals. 

RETURN VALUE

The previous set of masked signals is returned. 

EXAMPLES

The following call to sigsetmask() causes only the SIGUSR1 and SIGUSR2 signals to be blocked:

long oldmask;

oldmask = sigsetmask (sigmask (SIGUSR1) | sigmask (SIGUSR2));

WARNINGS

Do not use sigsetmask() in conjunction with the facilities described under sigset(2V).

AUTHOR

sigsetmask() was developed by the University of California, Berkeley. 

SEE ALSO

kill(2), sigblock(2), sigpause(2), sigprocmask(2), sigvector(2). 

Hewlett-Packard Company  —  HP-UX Release 9.0: August 1992