| SIGSETMASK(2) | System Calls Manual | SIGSETMASK(2) |
sigsetmask,
sigblock — manipulate
current signal mask
Standard C Library (libc, -lc)
#include
<signal.h>
int
sigsetmask(int
mask);
int
sigblock(int
mask);
int
sigmask(int
signum);
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.
The sigblock() and
sigsetmask() functions return the previous set of
masked signals.
kill(2), sigaction(2), sigprocmask(2), sigsuspend(2), sigvec(2), sigsetops(3)
The sigsetmask() and
sigblock() functions first appeared in
4.2BSD and have been deprecated.
| June 2, 1993 | Debian |