77 lines
3.2 KiB
Bash
77 lines
3.2 KiB
Bash
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#!/bin/bash
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#==================================================================================================
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# This shell script will start the mystic internet service (mis). It checks to see if a stale #
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# semaphore is left behind and will also error out if the process is already running and #
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# a start attempt is made. This script can ideally be called as a fork within a systemd .service #
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# file. The script will exit with an appropriate error code to indicate whether is was successful #
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# or not. It is intended to work only with Debian, Ubuntu and other debian based distributions. #
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# #
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# For more information visit: https://vswitchzero.com/mystic-systemd #
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#==================================================================================================
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# Some variables. Older versions of mystic used -d instead of daemon as an option, so change
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# accordingly. Also ensure your mystic path is set correctly.
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MIS_PATH=@MYSTIC_DIR@
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MIS_OPTS=daemon
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MIS_PID=$(ps auxwww | grep "mis $MIS_OPTS" | grep -v grep | awk '{print $2}')
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echo "Attempting to start the Mystic Internet Service (mis).."
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# Make sure mis isn't already running:
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if [ ! -z "$MIS_PID" ]
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then
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echo "mis-start.sh: Error: mis daemon is already running with PID $MIS_PID. Stop the service before attempting to start it."
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exit 1
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fi
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# If the process isn't running there shouldn't be a mis.bsy file in the semaphore directory.
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# Sometimes it's left behind if the process doesn't stop cleanly. This is not uncommon. The
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# file is removed if the proces is not running and the file exists. Otherwise the service will
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# fail to start.
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if [ -f "$MIS_PATH/semaphore/mis.bsy" ] && [ -z "$MIS_PID" ]
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then
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echo "Warning: The mis.bsy semaphore exists even though the mis daemon is not running."
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echo "Removing semaphore.."
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rm $MIS_PATH/semaphore/mis.bsy
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if [ -f "$MIS_PATH/semaphore/mis.bsy" ]
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then
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echo "Error: Failed to remove semaphore. Service cannot start while semaphore exists. Exiting."
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exit 1
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else
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echo "Semaphore successfully removed. Proceeding to start the mis daemon.."
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fi
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else
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echo "No stale semaphore file found. Proceeding to start the mis daemon.."
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fi
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# If the script gets to this point, it should be safe to start the mis daemon. The script first changes
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# directory to the mystic path specified just in case the "mysticbbs" environment variable is not set.
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cd $MIS_PATH > /dev/null
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$MIS_PATH/mis $MIS_OPTS
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cd - > /dev/null
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#Keep checking to make sure the service starts:
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MIS_COUNTER=0
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echo "Checking to ensure the process starts.."
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while [ $MIS_COUNTER -lt 6 ]
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do
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MIS_PID=$(ps auxwww | grep "mis $MIS_OPTS" | grep -v grep | awk '{print $2}')
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if [ -z "$MIS_PID" ]
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then
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echo "Process has not yet started. Waiting 5 seconds.."
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sleep 5
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else
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echo "Finished! Mis daemon has been started successfully at PID $MIS_PID."
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exit 0
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fi
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let MIS_COUNTER=MIS_COUNTER+1
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done
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# If it's still not up after 30 seconds we consider this a failure.
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if [ "$MIS_COUNTER" -eq 6 ] && [ -z "$MIS_PID" ]
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then
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echo "Error: Process failed to start after 30 seconds."
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exit 1
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fi
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