75 lines
2.2 KiB
Awk
Executable File
75 lines
2.2 KiB
Awk
Executable File
#!/usr/bin/gawk -f
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# Denon x311 volume-plugin for munin
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# Copyright (C) 2010 Kristian Lyngstøl
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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 2 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 along
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# with this program; if not, write to the Free Software Foundation, Inc.,
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# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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# This plugin asks a Denon (?) receiver over "telnet" what volume it's
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# running at and parses the result. It's tested with Denon AVR 4311, but I
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# suppose it works with the 3311 too, possibly more. It uses 192.168.0.60
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# by default - because I'm lazy.
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### Magic markers
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# #%# family=manual
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# #%# capabilities=
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#
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# Even if we _could_ do autoconf on ENVIRON["ip"], it's hazardous as you
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# have little control over timeouts and risk hanging around annoying the
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# user.
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BEGIN {
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if (ARGV[1] == "config") {
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print "graph_title Denon AVR-4311 Volume"
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print "graph_category radio"
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print "volume.label Volume"
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print "volume.type GAUGE"
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exit 0
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}
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if (ENVIRON["ip"] == "") {
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ip="denon.kristian.int"
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} else {
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ip=ENVIRON["ip"]
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}
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Service="/inet/tcp/0/" ip "/23"
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# The AVR-4311 uses just a \r as line/record separator (annoying as
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# heck).
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RS="\r"
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# MV? asks for volume. Returned in MVXXZ - the z is optional
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print "MV?\r" |&Service
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Service |& getline
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close(Service)
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gsub("^MV","")
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# 445 == 44.5. 44 = 44. So only divide by ten if more than 2
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# characters were returned. Note that it also returns 005 for 0.5
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if (length >2) {
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n=$0/10
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} else {
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n=$0
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}
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# 99 is "0" and 99.5 is "0.5" (somewhat audible). I shift
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# everything by 1 because I prefer my lists to start at 0, not
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# -1....
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if (n==99 || n == 99.5) {
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n-=99
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} else {
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n+=1
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}
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printf "volume.value %0.1f\n",n
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}
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