SwordArMor-gentoo-overlay/net-misc/frr/files/frr-openrc-v1

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#!/sbin/openrc-run
#
# FRR OpenRC init script.
#
# Copyright (C) 2020 Rafael F. Zalamena
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; only version 2 of the License.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
description="FRR initialization script."
# FRR variables.
frr_dir="/usr/lib/frr"
frr_state_dir="/run/frr"
config_file="/etc/frr/frr.conf"
daemon_file="/etc/frr/daemons"
daemon_db="/run/frrdb"
vty_config_file="/etc/frr/vtysh.conf"
frr_reload="$frr_dir/frr-reload.py"
frr_reload_log="$frr_state_dir/reload.log"
# Don't change profile here, use $daemon_file. This is the default.
frr_profile="traditional"
# watchfrr variables.
watchfrr_daemons=''
watchfrr_pidfile="$frr_state_dir/watchfrr.pid"
#
# Helpers.
#
_check_daemon_binary() {
local daemon=$1
[ -x "$frr_dir/$daemon" ] && return 0
eerror "No binary found for $daemon in $frr_dir"
return 1
}
_load_daemon_list() {
# Load FRR daemons configuration file.
while read line <&3 ; do
case $line in
""|"#"*)
# Skip empty/commented lines.
continue
;;
*d=*|*_instances=*|*_options=*|*_wrap=*)
# Load daemon options.
eval "$line"
;;
MAX_FDS=*|frr_profile=*|vtysh_enable=*)
# Load misc configuration.
eval "$line"
;;
esac
done 3< $daemon_file
# `zebra` and `staticd` are mandatory.
_check_daemon_binary 'zebra' || return 1
_check_daemon_binary 'staticd' || return 1
watchfrr_daemons='zebra staticd'
# Create the watchfrr command line.
for daemon in \
babeld bfdd bgpd eigrpd fabricd isisd ldpd nhrpd ospfd ospf6d pbrd \
pimd ripd ripngd sharpd vrrpd \
; do
# Trick to read variable name with variable.
cdaemon=$(eval echo \$$daemon)
cdaemon_instances=$(eval echo \$${daemon}_instances)
# Add daemon to command line if specified.
if [ ! -z $cdaemon ] && [ $cdaemon = 'yes' ]; then
_check_daemon_binary $daemon || return 1
# Multi instance daemon handling.
if [ ! -z $cdaemon_instances ]; then
for instance in $(echo $cdaemon_instances | tr ',' ' '); do
watchfrr_daemons="$watchfrr_daemons $daemon-$instance"
done
fi
# Single instance daemon handling.
watchfrr_daemons="$watchfrr_daemons $daemon"
continue
fi
done
}
_frr_start() {
# Apply MAX_FDS configuration if set.
if [ ! -z $MAX_FDS ]; then
veinfo " Setting maximum file descriptors to ${MAX_FDS}"
ulimit -n $MAX_FDS >/dev/null 2>/dev/null
fi
# Save started daemons to state database.
rm -f -- $daemon_db
for daemon in $watchfrr_daemons; do
echo $daemon >> $daemon_db
veinfo " Starting $daemon..."
done
veinfo " Starting watchfrr..."
# Start watchfrr which will start all configured daemons.
eval $all_wrap $frr_dir/watchfrr -d -F $frr_profile $watchfrr_daemons
veinfo " Loading configuration..."
# After starting the daemons, lets load the configuration.
if [ $vtysh_enable = 'yes' ]; then
vtysh -b -n
else
veinfo " Configuration loading disabled (vtysh_enable=$vtysh_enable)"
fi
}
_get_pid() {
local daemon=$1
local pid_file="$frr_state_dir/$daemon.pid"
# Test for file existence.
if [ ! -r "$pid_file" ]; then
eerror "Failed to find or read $daemon pid file"
return 1
fi
# Get PID if any.
pid=$(cat $pid_file)
if [ -z $pid ]; then
eerror "$daemon PID file empty"
return 1
fi
return 0
}
_stop_daemon() {
local daemon=$1
local pid_file="$frr_state_dir/$daemon.pid"
# Get daemon pid.
_get_pid $daemon
# Ask daemon to quit.
kill -2 "$pid"
# Test if daemon is still running.
attempts=1200
while kill -0 "$pid" 2>/dev/null; do
sleep 0.5
[ $((attempts - 1)) -gt 0 ] || break
done
# Tell user about our situation.
if kill -0 "$pid" 2>/dev/null ; then
eerror "Failed to stop $daemon (PID=${pid})"
return 1
else
rm -f -- $pid_file
fi
}
_frr_stop() {
local failures=0
# Stop watchfrr first so it doesn't restart anyone.
veinfo " Stopping watchfrr..."
_stop_daemon watchfrr || failures=1
# Read started daemon database.
while read line <&3 ; do
case $line in
""|"#"*)
# Skip empty/commented lines.
continue
;;
*)
# Get daemon name.
veinfo " Stopping $line..."
_stop_daemon $line || failures=1
;;
esac
done 3< $daemon_db
# Remove daemon database file.
rm -f -- $daemon_db
return $failures
}
_check_watchfrr() {
_get_pid watchfrr || return 1
return 0
}
#
# Main.
#
depend() {
# We need root to write logs.
need localmount
# Optionally wait for network to start.
use net
# Expect /run to be ready.
after bootmisc
}
start_pre() {
# Check configuration file readability.
checkpath -f -m 0640 -o frr:frr $vty_config_file
checkpath -f -m 0640 -o frr:frr $daemon_file
checkpath -f -m 0640 -o frr:frr $config_file
# Check run state directory.
checkpath -d -o frr $frr_state_dir
# Load daemon list and peform checks.
_load_daemon_list
}
start() {
# Load daemon list.
_load_daemon_list
# Handle restarts.
if [ "$RC_CMD" = 'restart' ]; then
ebegin 'Reloading FRR configuration'
else
ebegin 'Starting FRR'
fi
# Start FRR.
_frr_start
# New daemons and watchfrr started, apply new configuration.
if [ "$RC_CMD" = 'restart' ]; then
"$frr_reload" --reload "$config_file" 2>/run/frr/reload.log
[ $? -ne 0 ] && ewarn " Failed to reload (check $frr_reload_log)"
# NOTE: we can't return bad status otherwise OpenRC will think we
# failed to start, lets print a helpful message instead.
fi
eend 0
}
stop() {
local failures=0
# Handle restarts.
if [ "$RC_CMD" = 'restart' ]; then
# Load daemon list.
_load_daemon_list
# We must restart 'watchfrr' in order to start new daemons.
veinfo " Stopping watchfrr..."
_stop_daemon watchfrr
# Stop daemons that are no longer in configuration file.
for daemon in $(ls -1 /run/frr/*.pid | cut -d '.' -f 1); do
# Filter daemon name.
daemon=$(basename "$daemon")
# Skip watchfrr.
[ "$daemon" = 'watchfrr' ] && continue
echo "$watchfrr_daemons" | grep "$daemon" >/dev/null
if [ $? -ne 0 ]; then
veinfo " Stopping $daemon..."
_stop_daemon $daemon
fi
done
return 0
fi
ebegin 'Stopping FRR'
_frr_stop || failures=1
eend $failures 'some daemons failed to stop'
}
status() {
_check_watchfrr || return 1
}