[unix-history] / usr / man / man2 / sigblock.2

.TH SIGBLOCK 2 "15 June 1983"
.UC 4
.SH NAME
sigblock \- block signals
.SH SYNOPSIS
.nf
.B sigblock(mask);
.B int mask;
.SH DESCRIPTION
.I Sigblock
causes the signals specified in
.I mask
to be added to the set of signals currently
being blocked from delivery.  Signal
.I i
is blocked if the
.IR i -th
bit in 
.I mask
is a 1.
.PP
It is not possible to block SIGKILL,
SIGSTOP, or SIGCONT;  this restriction is silently
imposed by the system.
.SH "RETURN VALUE
The previous set of masked signals is returned.
.SH "SEE ALSO"
kill(2), sigvec(2), sigsetmask(2),
Commit	Line	Data
250bd477 C	1	.TH SIGBLOCK 2 "15 June 1983"
	2	.UC 4
	3	.SH NAME
	4	sigblock \- block signals
	5	.SH SYNOPSIS
	6	.nf
	7	.B sigblock(mask);
	8	.B int mask;
	9	.SH DESCRIPTION
	10	.I Sigblock
	11	causes the signals specified in
	12	.I mask
	13	to be added to the set of signals currently
	14	being blocked from delivery. Signal
	15	.I i
	16	is blocked if the
	17	.IR i -th
	18	bit in
	19	.I mask
	20	is a 1.
	21	.PP
	22	It is not possible to block SIGKILL,
	23	SIGSTOP, or SIGCONT; this restriction is silently
	24	imposed by the system.
	25	.SH "RETURN VALUE
	26	The previous set of masked signals is returned.
	27	.SH "SEE ALSO"
	28	kill(2), sigvec(2), sigsetmask(2),