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#!/bin/sh
#
#
# This is a "library" of sorts for use by the other FRR shell scripts. It
# has most of the daemon start/stop logic, but expects the following shell
# functions/commands to be provided by the "calling" script:
#
# log_success_msg
# log_warning_msg
# log_failure_msg
#
# (coincidentally, these are LSB standard functions.)
#
# Sourcing this file in a shell script will load FRR config variables but
# not perform any action. Note there is an "exit 1" if the main config
# file does not exist.
#
# This script should be installed in /usr/sbin/frrcommon.sh
PATH=/bin:/usr/bin:/sbin:/usr/sbin
D_PATH="/usr/sbin" # /usr/lib/frr
C_PATH="/etc/frr" # /etc/frr
V_PATH="/var/run/frr" # /var/run/frr
VTYSH="/usr/bin/vtysh" # /usr/bin/vtysh
FRR_USER="network" # frr
FRR_GROUP="network" # frr
FRR_VTY_GROUP="" # frrvty
# ORDER MATTERS FOR $DAEMONS!
# - keep zebra first
# - watchfrr does NOT belong in this list
DAEMONS="zebra bgpd ripd ripngd ospfd ospf6d isisd babeld pimd ldpd nhrpd eigrpd sharpd pbrd staticd bfdd fabricd vrrpd"
RELOAD_SCRIPT="$D_PATH/frr-reload.py"
#
# general helpers
#
debug() {
[ -n "$watchfrr_debug" ] || return 0
printf '%s %s(%s):' "`date +%Y-%m-%dT%H:%M:%S.%N`" "$0" $$ >&2
# this is to show how arguments are split regarding whitespace & co.
# (e.g. for use with `debug "message" "$@"`)
while [ $# -gt 0 ]; do
printf ' "%s"' "$1" >&2
shift
done
printf '\n' >&2
}
chownfrr() {
[ -n "$FRR_USER" ] && chown "$FRR_USER" "$1"
[ -n "$FRR_GROUP" ] && chgrp "$FRR_GROUP" "$1"
}
vtysh_b () {
[ "$1" = "watchfrr" ] && return 0
[ -r "$C_PATH/frr.conf" ] || return 0
if [ -n "$1" ]; then
"$VTYSH" -b -n -d "$1"
else
"$VTYSH" -b -n
fi
}
daemon_inst() {
# note this sets global variables ($dmninst, $daemon, $inst)
dmninst="$1"
daemon="${dmninst%-*}"
inst=""
[ "$daemon" != "$dmninst" ] && inst="${dmninst#*-}"
}
daemon_list() {
# note $1 and $2 specify names for global variables to be set
local enabled disabled evar dvar
enabled=""
disabled=""
evar="$1"
dvar="$2"
for daemon in $DAEMONS; do
eval cfg=\$$daemon
eval inst=\$${daemon}_instances
[ "$daemon" = zebra -o "$daemon" = staticd ] && cfg=yes
if [ -n "$cfg" -a "$cfg" != "no" -a "$cfg" != "0" ]; then
if ! daemon_prep "$daemon" "$inst"; then
continue
fi
debug "$daemon enabled"
enabled="$enabled $daemon"
if [ -n "$inst" ]; then
debug "$daemon multi-instance $inst"
oldifs="${IFS}"
IFS="${IFS},"
for i in $inst; do
enabled="$enabled $daemon-$i"
done
IFS="${oldifs}"
fi
else
debug "$daemon disabled"
disabled="$disabled $daemon"
fi
done
enabled="${enabled# }"
disabled="${disabled# }"
[ -z "$evar" ] && echo "$enabled"
[ -n "$evar" ] && eval $evar="\"$enabled\""
[ -n "$dvar" ] && eval $dvar="\"$disabled\""
}
#
# individual daemon management
#
daemon_prep() {
local daemon inst cfg
daemon="$1"
inst="$2"
[ "$daemon" = "watchfrr" ] && return 0
[ -x "$D_PATH/$daemon" ] || {
log_failure_msg "cannot start $daemon${inst:+ (instance $inst)}: daemon binary not installed"
return 1
}
[ -r "$C_PATH/frr.conf" ] && return 0
cfg="$C_PATH/$daemon${inst:+-$inst}.conf"
if [ ! -r "$cfg" ]; then
touch "$cfg"
chownfrr "$cfg"
fi
return 0
}
daemon_start() {
local dmninst daemon inst args instopt wrap bin
daemon_inst "$1"
ulimit -n $MAX_FDS > /dev/null 2> /dev/null
daemon_prep "$daemon" "$inst" || return 1
if test ! -d "$V_PATH"; then
mkdir -p "$V_PATH"
chown $FRR_USER "$V_PATH"
fi
eval wrap="\$${daemon}_wrap"
bin="$D_PATH/$daemon"
instopt="${inst:+-n $inst}"
eval args="\$${daemon}_options"
if eval "$all_wrap $wrap $bin -d $instopt $args"; then
log_success_msg "Started $dmninst"
vtysh_b "$daemon"
else
log_failure_msg "Failed to start $dmninst!"
fi
}
daemon_stop() {
local dmninst daemon inst pidfile vtyfile pid cnt fail
daemon_inst "$1"
pidfile="$V_PATH/$daemon${inst:+-$inst}.pid"
vtyfile="$V_PATH/$daemon${inst:+-$inst}.vty"
[ -r "$pidfile" ] || fail="pid file not found"
[ -z "$fail" ] && pid="`cat \"$pidfile\"`"
[ -z "$fail" -a -z "$pid" ] && fail="pid file is empty"
[ -n "$fail" ] || kill -0 "$pid" 2>/dev/null || fail="pid $pid not running"
if [ -n "$fail" ]; then
log_failure_msg "Cannot stop $dmninst: $fail"
return 1
fi
debug "kill -2 $pid"
kill -2 "$pid"
cnt=1200
while kill -0 "$pid" 2>/dev/null; do
sleep 1
[ $(( cnt -= 1 )) -gt 0 ] || break
done
if kill -0 "$pid" 2>/dev/null; then
log_failure_msg "Failed to stop $dmninst, pid $pid still running"
still_running=1
return 1
else
log_success_msg "Stopped $dmninst"
rm -f "$pidfile"
return 0
fi
}
daemon_status() {
local dmninst daemon inst pidfile pid fail
daemon_inst "$1"
pidfile="$V_PATH/$daemon${inst:+-$inst}.pid"
[ -r "$pidfile" ] || return 3
pid="`cat \"$pidfile\"`"
[ -z "$pid" ] && return 1
kill -0 "$pid" 2>/dev/null || return 1
return 0
}
print_status() {
daemon_status "$1"
rv=$?
if [ "$rv" -eq 0 ]; then
log_success_msg "Status of $1: running"
else
log_failure_msg "Status of $1: FAILED"
fi
return $rv
}
#
# all-daemon commands
#
all_start() {
daemon_list daemons
for dmninst in $daemons; do
daemon_start "$dmninst"
done
}
all_stop() {
local pids reversed
daemon_list daemons disabled
[ "$1" = "--reallyall" ] && daemons="$daemons $disabled"
reversed=""
for dmninst in $daemons; do
reversed="$dmninst $reversed"
done
for dmninst in $reversed; do
daemon_stop "$dmninst" &
pids="$pids $!"
done
for pid in $pids; do
wait $pid
done
}
all_status() {
local fail
daemon_list daemons
fail=0
for dmninst in $daemons; do
print_status "$dmninst" || fail=1
done
return $fail
}
#
# config sourcing
#
load_old_config() {
oldcfg="$1"
[ -r "$oldcfg" ] || return 0
[ -s "$oldcfg" ] || return 0
grep -v '^[[:blank:]]*\(#\|$\)' "$oldcfg" > /dev/null || return 0
log_warning_msg "Reading deprecated $oldcfg. Please move its settings to $C_PATH/daemons and remove it."
# save off settings from daemons for the OR below
for dmn in $DAEMONS; do eval "_new_$dmn=\${$dmn:-no}"; done
. "$oldcfg"
# OR together the daemon enabling options between config files
for dmn in $DAEMONS; do eval "test \$_new_$dmn != no && $dmn=\$_new_$dmn; unset _new_$dmn"; done
}
[ -r "$C_PATH/daemons" ] || {
log_failure_msg "cannot run $@: $C_PATH/daemons does not exist"
exit 1
}
. "$C_PATH/daemons"
load_old_config "$C_PATH/daemons.conf"
load_old_config "/etc/default/frr"
load_old_config "/etc/sysconfig/frr"
if { declare -p watchfrr_options 2>/dev/null || true; } | grep -q '^declare \-a'; then
log_warning_msg "watchfrr_options contains a bash array value." \
"The configured value is intentionally ignored since it is likely wrong." \
"Please remove or fix the setting."
unset watchfrr_options
fi
#
# other defaults and dispatch
#
frrcommon_main() {
local cmd
debug "frrcommon_main" "$@"
cmd="$1"
shift
if [ "$1" = "all" -o -z "$1" ]; then
case "$cmd" in
start) all_start;;
stop) all_stop;;
restart)
all_stop
all_start
;;
*) $cmd "$@";;
esac
else
case "$cmd" in
start) daemon_start "$@";;
stop) daemon_stop "$@";;
restart)
daemon_stop "$@"
daemon_start "$@"
;;
*) $cmd "$@";;
esac
fi
}