76 lines
1.3 KiB
Groff
76 lines
1.3 KiB
Groff
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.TH SIGPROCMASK 2
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.SH NAME
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sigprocmask \- manipulate the signal mask
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.SH SYNOPSIS
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.ft B
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#include <signal.h>
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int sigprocmask(int \fIhow\fP, const sigset_t *\fIset\fP, sigset_t *\fIoset\fP)
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.ft P
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.SH DESCRIPTION
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.B Sigprocmask()
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examines or manipulates the signal mask. This mask is the set of signals
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that are currently blocked. The
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.I how
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argument determines the action that must be performed. In all cases the
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signal set referenced by
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.IR oset ,
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if not
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.BR NULL ,
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will be used to receive the old signal mask. The
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.I set
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argument, if not
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.BR NULL ,
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will be used to set or modify the current signal mask.
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.PP
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.I How
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can be one of:
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.PP
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.TP 15
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.B SIG_BLOCK
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Add the signals referenced by
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.I set
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to the mask.
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.TP
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.B SIG_UNBLOCK
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Remove the signals referenced by
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.I set
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from the mask.
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.TP
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.B SIG_SETMASK
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Set the signal mask to the set referenced by
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.IR set .
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.PP
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The value of
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.I how
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is ignored if
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.I set
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is
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.BR NULL .
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.SH "SEE ALSO"
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.BR sigaction (2),
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.BR sigpending (2),
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.BR sigsuspend (2),
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.BR sigset (3).
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.SH DIAGNOSTICS
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Returns
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.B 0
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on success and
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.B \-1
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on error. The error code is
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.B EFAULT
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for a bad
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.I set
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or
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.I oset
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address, or
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.B EINVAL
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for a bad
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.I how
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argument.
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.SH AUTHOR
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Kees J. Bot (kjb@cs.vu.nl)
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.\"
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.\" $PchId: sigprocmask.2,v 1.2 1996/04/11 06:02:09 philip Exp $
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