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64 lines
1.7 KiB
D
Executable File
64 lines
1.7 KiB
D
Executable File
#!/usr/sbin/dtrace -s
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/*
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* woof.d - Bark whenever new processes appear. Needs /dev/audio.
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* Written in DTrace (Solaris 10 3/05).
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*
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* $Id: woof.d,v 1.1.1.1 2015/09/30 22:01:09 christos Exp $
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*
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* USAGE: woof.d &
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*
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* SEE ALSO: /usr/dt/bin/sdtaudiocontrol # to set volume
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*
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* COPYRIGHT: Copyright (c) 2006 Brendan Gregg.
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*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License, Version 1.0 only
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* (the "License"). You may not use this file except in compliance
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* with the License.
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*
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* You can obtain a copy of the license at Docs/cddl1.txt
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* or http://www.opensolaris.org/os/licensing.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* CDDL HEADER END
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*
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* 14-Aug-2006 Brendan Gregg Created this.
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* 14-Aug-2006 " " Last update.
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*/
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#pragma D option quiet
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#pragma D option destructive
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#pragma D option switchrate=10hz
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inline int SCREEN_OUTPUT = 0; /* Set to 1 for screen output */
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/* barks prevents woof.d from barking too much (up to 20 barks/second) */
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int barks;
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dtrace:::BEGIN
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{
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SCREEN_OUTPUT ? trace("Beware of the dog!\n") : 1;
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}
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/*
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* Call the shell to run a background audioplay command (cat > /dev/audio
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* doesn't always work). One problem this creates is a feedback loop,
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* where we bark at our own barks, or at other dogs barks; entertaining
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* as this is, it can really slog the system and has been avoided by
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* checking our ancestory.
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*/
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proc:::exec-success
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/!progenyof($pid) && barks++ < 2/
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{
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SCREEN_OUTPUT ? trace("Woof! ") : 1;
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system("audioplay /usr/share/audio/samples/au/bark.au &");
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}
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profile:::tick-10hz
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{
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barks = 0;
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}
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