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94 lines
2.8 KiB
Groff
94 lines
2.8 KiB
Groff
.\" Copyright (c) 1983, 1991, 1993
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.\" The Regents of the University of California. All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 4. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" @(#)sigpause.2 8.1 (Berkeley) 6/2/93
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.\" $FreeBSD$
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.\"
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.Dd June 2, 1993
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.Dt SIGPAUSE 2
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.Os
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.Sh NAME
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.Nm sigpause
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.Nd atomically release blocked signals and wait for interrupt
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.Sh LIBRARY
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.Lb libc
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.Sh SYNOPSIS
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.In signal.h
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.Ft int
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.Fn sigpause "int sigmask"
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.Sh DESCRIPTION
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.Sy This interface is made obsolete by
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.Xr sigsuspend 2 .
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.Pp
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The
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.Fn sigpause
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function
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assigns
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.Fa sigmask
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to the set of masked signals
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and then waits for a signal to arrive;
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on return the set of masked signals is restored.
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The
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.Fa sigmask
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argument
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is usually 0 to indicate that no
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signals are to be blocked.
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The
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.Fn sigpause
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function
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always terminates by being interrupted, returning -1 with
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.Va errno
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set to
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.Er EINTR
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.Sh SEE ALSO
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.Xr kill 2 ,
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.Xr sigaction 2 ,
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.Xr sigblock 2 ,
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.Xr sigprocmask 2 ,
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.Xr sigsuspend 2 ,
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.Xr sigvec 2
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.Sh STANDARDS
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The
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.Fn sigpause
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function is implemented for compatibility with historic
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.Bx 4.3
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applications.
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An incompatible interface by the same name, which used a single signal number
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rather than a mask, was present in
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.At V ,
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and was copied from there into the
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.Sy X/Open System Interfaces
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.Pq Tn XSI
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option of
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.St -p1003.1-2001 .
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.Sh HISTORY
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The
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.Fn sigpause
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function appeared in
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.Bx 4.2
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and has been deprecated.
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