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SIGMASK(2FREEBSD) - man page online | system calls

Manipulate current signal mask.

Chapter
June 2, 1993
SIGSETMASK(2)                        BSD System Calls Manual                        SIGSETMASK(2)

NAME sigsetmask, sigblock — manipulate current signal mask
LIBRARY Standard C Library (libc, -lc)
SYNOPSIS #include <signal.h> int sigsetmask(int mask); int sigblock(int mask); int sigmask(int signum);
DESCRIPTION This interface is made obsolete by: 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 kill(2), sigaction(2), sigprocmask(2), sigsuspend(2), sigvec(2), sigsetops(3)
HISTORY The sigsetmask() and sigblock() functions first appeared in 4.2BSD and have been deprecated.
BSD June 2, 1993 BSD
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sigmask(2freebsd) referred by
refer to kill(2) | sigaction(2) | sigprocmask(2) | sigsetmask(2freebsd) | sigsetops(3) | sigsuspend(2) | sigvec(2freebsd)