|SIGBLOCK(2)||System Calls Manual||SIGBLOCK(2)|
sigblock — block
Standard C Library (libc, -lc)
adds the signals specified in mask to the set of
signals currently being blocked from delivery. Signals are blocked if the
corresponding bit in mask is a 1; the macro
is provided to construct the mask for a given
It is not possible to block
SIGSTOP; this restriction is silently imposed by the
The previous set of masked signals is returned.
sigblock() function call appeared in
4.2BSD and has been deprecated.
|June 2, 1993||macOS 14.1|