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| 1 | .TH SIGPROCMASK 2
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| 2 | .SH NAME
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| 3 | sigprocmask \- manipulate the signal mask
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| 4 | .SH SYNOPSIS
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| 5 | .ft B
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| 6 | #include <signal.h>
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| 7 |
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| 8 | int sigprocmask(int \fIhow\fP, const sigset_t *\fIset\fP, sigset_t *\fIoset\fP)
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| 9 | .ft P
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| 10 | .SH DESCRIPTION
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| 11 | .B Sigprocmask()
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| 12 | examines or manipulates the signal mask. This mask is the set of signals
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| 13 | that are currently blocked. The
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| 14 | .I how
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| 15 | argument determines the action that must be performed. In all cases the
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| 16 | signal set referenced by
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| 17 | .IR oset ,
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| 18 | if not
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| 19 | .BR NULL ,
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| 20 | will be used to receive the old signal mask. The
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| 21 | .I set
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| 22 | argument, if not
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| 23 | .BR NULL ,
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| 24 | will be used to set or modify the current signal mask.
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| 25 | .PP
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| 26 | .I How
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| 27 | can be one of:
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| 28 | .PP
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| 29 | .TP 15
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| 30 | .B SIG_BLOCK
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| 31 | Add the signals referenced by
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| 32 | .I set
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| 33 | to the mask.
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| 34 | .TP
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| 35 | .B SIG_UNBLOCK
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| 36 | Remove the signals referenced by
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| 37 | .I set
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| 38 | from the mask.
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| 39 | .TP
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| 40 | .B SIG_SETMASK
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| 41 | Set the signal mask to the set referenced by
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| 42 | .IR set .
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| 43 | .PP
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| 44 | The value of
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| 45 | .I how
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| 46 | is ignored if
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| 47 | .I set
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| 48 | is
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| 49 | .BR NULL .
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| 50 | .SH "SEE ALSO"
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| 51 | .BR sigaction (2),
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| 52 | .BR sigpending (2),
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| 53 | .BR sigsuspend (2),
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| 54 | .BR sigset (3).
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| 55 | .SH DIAGNOSTICS
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| 56 | Returns
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| 57 | .B 0
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| 58 | on success and
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| 59 | .B \-1
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| 60 | on error. The error code is
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| 61 | .B EFAULT
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| 62 | for a bad
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| 63 | .I set
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| 64 | or
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| 65 | .I oset
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| 66 | address, or
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| 67 | .B EINVAL
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| 68 | for a bad
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| 69 | .I how
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| 70 | argument.
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| 71 | .SH AUTHOR
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| 72 | Kees J. Bot (kjb@cs.vu.nl)
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| 73 |
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| 74 | .\"
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| 75 | .\" $PchId: sigprocmask.2,v 1.2 1996/04/11 06:02:09 philip Exp $
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