June 2, 1993
freebsd-manpages
Manual pages for a GNU/kFreeBSD system
NAME
sigsetmask, sigblock - manipulate current signal mask
LIBRARY
.Lb libc
SYNOPSIS
.In signal.h int
sigsetmask int mask int sigblock int mask int sigmask int signumDESCRIPTION
.Bf -symbolic This interface is made obsolete by:
.Ef sigprocmask(2).
The
sigsetmask function sets the current signal mask to the specified mask. Signals are blocked from delivery if the corresponding bit in mask is a 1. The sigblock function adds the signals in the specified mask to the current signal mask, rather than overwriting it as sigsetmask does. The macro sigmask is provided to construct the mask for a given signum.The system quietly disallows
SIGKILL or SIGSTOP to be blocked.RETURN VALUES
The
sigblock and sigsetmask functions return the previous set of masked signals.SEE ALSO
HISTORY
The
sigsetmask and sigblock functions first appeared in BSD 4.2 and have been deprecated.