43 lines
1.7 KiB
Plaintext
43 lines
1.7 KiB
Plaintext
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#!/bin/bash
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#
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# Invoke script on xscreensaver state change
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#
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# Copyright (C) 2013 Mike Gerwitz
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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# This simplifies hooking xscreensaver by having a script invoked with each
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# state change rather than having to deal with daemon code. Since the script
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# (and its executable check) is invoked with each and every state change,
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# this has the pleasent and familiar benefit of allowing the user to change
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# the script at any point in time without restarting the daemon.
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#
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# All output from the invoked script is redirected to stderr for logging.
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#
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# The -watch data is output back to stdout so that it may be used as a part
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# of a pipeline in place of xscreensaver-command -watch.
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##
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# if no script is given as the first argument, default to a standard script
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# name in the user's home directory
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cmd="${1:-$HOME/.xscreensaver-watch}"
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log="${2:-$HOME/.xscreensaver-watch.log}"
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# -watch provides data in the format <state> <ts>; we will invoke the script
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# once for each line of input, passing those data as two arguments
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xscreensaver-command -watch | while read state ts; do
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[ -x "$cmd" ] && "$cmd" "$state" "$ts" >&2
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echo "$state $ts"
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done
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