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