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#!/bin/sh
#
# Start the `FRP server' as a daemon, and start/check with a cron job.
# https://github.com/fatedier/frp
#
# See start-stop-daemon(8) for details.
# The `start-stop-daemon' tool is shipped with the `dpkg' package on
# Debian systems, which is an essential part. While on non-Debian
# systems, e.g., RedHat/CentOS, install the `dpkg' package to get this
# tool ;)
#
#
# Example configuration file:
# ---------------------------------------------------------------------
# [common]
# bind_port = xxxx
# ---------------------------------------------------------------------
#
# Example cron job (check every 10th minutes):
# */10 * * * * sh $HOME/bin/frps-daemon.sh start >/dev/null 2>&1
#
# NOTE:
# * If the machine that runs this `FRP server' is behind a NAT, then
# port forwarding for the above `bind_port' should be enabled.
# * For each service that FRP proxies, e.g., SSH, an extra port will
# be bind to the server-side machine, as specified by the `remote_port'
# in the client-side configuration file.
# * With only `bind_port' been forwarded, one can SSH into the server-side
# machine first, then SSH into the client-side machine through:
# ssh -p <remote_port> <user>@localhost
# * With the extra `remote_port' been also forwarded, one can simply
# SSH into the client-side machine with:
# ssh -p <remote_port> <user>@<ip_server_side>
#
#
# Aaron LI
# 2018-01-23
#
NAME=frps
PROGRAM=$HOME/local/frp/frps
CONFIG=$HOME/configs/${NAME}.ini
PIDFILE=$HOME/.cache/${NAME}.pid
LOGFILE=$HOME/.cache/${NAME}.log
PATH=${PATH}:/usr/local/sbin:/usr/sbin:/sbin
case "$1" in
start)
cmd=start
cmd_args="--start --make-pidfile --background"
;;
stop)
cmd=stop
cmd_args="--stop --remove-pidfile --retry 5"
;;
status)
cmd=status
cmd_args="--status"
;;
*)
echo "usage: ${0##*/} {start|stop|status}"
exit 1
;;
esac
start-stop-daemon ${cmd_args} \
--oknodo --verbose \
--name ${NAME} \
--pidfile ${PIDFILE} \
--startas ${PROGRAM} \
-- -c ${CONFIG} -L ${LOGFILE}
ret=$?
if [ "${cmd}" = "start" ]; then
if [ ${ret} -eq 0 ]; then
echo "Successfully started ${NAME} as PID $(cat ${PIDFILE})"
else
echo "Failed to start ${NAME}: ${PROGRAM}"
echo "Exit code: ${ret}"
fi
elif [ "${cmd}" = "stop" ]; then
if [ ${ret} -eq 0 ]; then
echo "Successfully stopped ${NAME}: ${PROGRAM}"
else
echo "Failed to stop ${NAME}: ${PROGRAM}"
echo "Exit code: ${ret}"
fi
elif [ "${cmd}" = "status" ]; then
if [ ${ret} -eq 0 ]; then
echo "${NAME} is running as PID $(cat ${PIDFILE})"
elif [ ${ret} -eq 1 ]; then
echo "${NAME} is not running but the PID file (${PIDFILE}) exists"
elif [ ${ret} -eq 3 ]; then
echo "${NAME} is not running"
else
echo "${NAME} in unknown status"
echo "Exit code: ${ret}"
fi
else
echo "ERROR: unknown command: ${cmd}"
fi
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