Return to sigsetops.3 CVS log

Up to [CSRG BSD Unix] / 43BSDReno / lib / libc / gen

BSD 4.3reno

.\" Copyright (c) 1983 The Regents of the University of California.
.\" All rights reserved.
.\"
.\" Redistribution and use in source and binary forms are permitted provided
.\" that: (1) source distributions retain this entire copyright notice and
.\" comment, and (2) distributions including binaries display the following
.\" acknowledgement:  ``This product includes software developed by the
.\" University of California, Berkeley and its contributors'' in the
.\" documentation or other materials provided with the distribution and in
.\" all advertising materials mentioning features or use of this software.
.\" Neither the name of the University nor the names of its contributors may
.\" be used to endorse or promote products derived from this software without
.\" specific prior written permission.
.\" THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
.\" WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
.\" MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
.\"
.\"	@(#)sigsetops.2	6.1 (Berkeley) 7/1/90
.\"
.TH SIGSETOPS 3 "July 1, 1990"
.UC 7
.SH NAME
sigsetops, sigemptyset, sigfillset, sigaddset, sigdelset, sigismember \- manipulate signal masks
.SH SYNOPSIS
.nf
.B #include <signal.h>

.B sigemptyset(set);
.B sigset_t *set;

.B sigfillset(set);
.B sigset_t *set;

.B sigaddset(set, signo);
.B sigset_t *set;
.B int signo;

.B sigdelset(set, signo);
.B sigset_t *set;
.B int signo;

.B sigismember(set, signo);
.B sigset_t *set;
.B int signo;

.SH DESCRIPTION
These functions manipulate signal mask stored in a
.IR sigset_t .
They are provided as macros, but actual functions are available
if their names are undefined (with #undef
.IR name ).
.PP
The
.I sigemptyset
function initializes a signal set to be empty.
The
.I sigfillset
function initializes a signal set to contain all of the known signals.
One of these routines must be used to initialize a signal set
before its use by the other functions.
.PP
The
.I sigaddset
function adds a specified signal
.I signo
to a signal set.
The
.I sigdelset
function deletes a specified signal
.I signo
from a signal set.
.PP
The
.I sigismember
function tests whether a specified signal
.I signo
is contained in a signal set.
.SH "RETURN VALUE
The
.I sigismember
function returnes 1
if the signal is a member of the set,
a 0 otherwise.
The other functions return 0 upon success.
A \-1 return value
indicates an error occurred and
.I errno
is set to indicated the reason.
The current implementation does not detect any errors.
.SH ERRORS
These functions could fail if one of the following occurs:
.TP 15
[EINVAL]
.I signo
has an invalid value.
.SH STANDARDS
These functions are defined by POSIX.1.
.SH "SEE ALSO"
kill(2), sigaction(2), sigsetops(2), sigsuspend(2)

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.