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52 lines
3.0 KiB
52 lines
3.0 KiB
#!/bin/bash
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##################################################################################
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# Send beacon via APRS channel 2 (ax1) #
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# #
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# (C)2021 M.T. Konstapel https://meezenest.nl/mees #
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# #
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# This file is part of PE1RXF-APRS-server. #
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# #
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# PE1RXF-APRS-server 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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# PE1RXF-APRS-server 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 PE1RXF-APRS-server. If not, see <https://www.gnu.org/licenses/>. #
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# #
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##################################################################################
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source /home/marcel/ham/aprs_utils/config.shlib; # load the config library functions
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ConfigFile="/home/marcel/ham/aprs_utils/pe1rxf-aprs-server.cfg"
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BEACON_FILE="$(config_get ax1_beacon_file $ConfigFile)"
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if [ -f "$BEACON_FILE" ]; then
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BEACON_TEXT=$(cat "$BEACON_FILE")
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# The BEACON_FILE holds the command for sending a beacon. So make this file part of the script.
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# I shouldn't really do this, as it is a potential security risk. But the BEACON_FILE is as safe as this script itself.
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# The BEACON_FILE can not be altered via the web interface, but only by the main program. So it should be ok.
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# But this makes the code potential self altering, which is bad! Realy realy bad!
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# But than again, is it really not the same as calling an external program from the script, as this program can also be alterred.
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# Anyway, enough of my rambling, let's continue with the script.
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# To be safe, lets do some minimal safety checks before executing the external file:
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# BEACON_FILE should only have one line:
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NR_OF_LINES=$(awk 'END { print NR }' $BEACON_FILE)
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# And this line should contain the beacon command:
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RESULT=$(grep "/usr/sbin/beacon" $BEACON_FILE)
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if [ -n "$RESULT" ] && [ $NR_OF_LINES -eq 1 ]; then
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# Send the beacon
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. $BEACON_FILE
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fi
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fi
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