sigwait.2 revision 81588
Copyright (C) 2000 Jason Evans <jasone@FreeBSD.org>.
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$FreeBSD: head/lib/libc/sys/sigwait.2 81588 2001-08-13 16:33:00Z ru $
.Dd April 27, 2000 .Dt SIGWAIT 3 .Os .Sh NAME .Nm sigwait .Nd select a set of signals .Sh LIBRARY .Lb libc_r .Sh SYNOPSIS .Fd #include <signal.h> .Ft int .Fn sigwait "const sigset_t *set" "int *sig" .Sh DESCRIPTION The .Fn sigwait function selects a set of signals, specified by .Fa set . If none of the selected signals are pending, .Fn sigwait waits until one or more of the selected signals has been generated. Then .Fn sigwait atomically clears one of the selected signals from the set of pending signals for the process and sets the location pointed to by .Fa sig to the signal number that was cleared.
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
notice(s), this list of conditions and the following disclaimer as
the first lines of this file unmodified other than the possible
addition of one or more copyright notices.
2. Redistributions in binary form must reproduce the above copyright
notice(s), this list of conditions and the following disclaimer in
the documentation and/or other materials provided with the
distribution.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY
EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
$FreeBSD: head/lib/libc/sys/sigwait.2 81588 2001-08-13 16:33:00Z ru $
.Dd April 27, 2000 .Dt SIGWAIT 3 .Os .Sh NAME .Nm sigwait .Nd select a set of signals .Sh LIBRARY .Lb libc_r .Sh SYNOPSIS .Fd #include <signal.h> .Ft int .Fn sigwait "const sigset_t *set" "int *sig" .Sh DESCRIPTION The .Fn sigwait function selects a set of signals, specified by .Fa set . If none of the selected signals are pending, .Fn sigwait waits until one or more of the selected signals has been generated. Then .Fn sigwait atomically clears one of the selected signals from the set of pending signals for the process and sets the location pointed to by .Fa sig to the signal number that was cleared.
p The signals specified by .Fa set should be blocked at the time of the call to .Fn sigwait . .Sh RETURN VALUES If successful, .Fn sigwait returns 0 and sets the location pointed to by .Fa sig to the cleared signal number. Otherwise, an error number is returned. .Sh ERRORS .Fn sigwait will fail if: l -tag -width Er t Bq Er EINVAL .Fa set specifies one or more invalid signal numbers. .El .Sh SEE ALSO .Xr sigaction 2 , .Xr sigpending 2 , .Xr sigsuspend 2 , .Xr pause 3 , .Xr pthread_sigmask 3 .Sh STANDARDS .Fn sigwait conforms to .St -p1003.1-96