linux shell

frrinit.sh

if [ -r "/lib/lsb/init-functions" ]; then
    . /lib/lsb/init-functions
else
    log_success_msg() {
        echo "$@"
    }
    log_warning_msg() {
        echo "$@" >&2
    }
    log_failure_msg() {
        echo "$@" >&2
    }
fi

# "/usr/lib/frr/frrinit.sh start somenamespace"
FRR_PATHSPACE="$2"

self="`dirname $0`"
if [ -r "$self/frrcommon.sh" ]; then
    . "$self/frrcommon.sh"
else
    . "@CFG_SBIN@/frrcommon.sh"
fi

case "$1" in
start)
    daemon_list daemons
    watchfrr_options="$watchfrr_options $daemons"
    daemon_start watchfrr
    ;;
stop)
    daemon_stop watchfrr
    all_stop --reallyall
    exit ${still_running:-0}
    ;;

restart|force-reload)
    daemon_stop watchfrr
    all_stop --reallyall

    daemon_list daemons
    watchfrr_options="$watchfrr_options $daemons"
    daemon_start watchfrr
    ;;

status)
    fail=0
    print_status watchfrr || fail=1
    all_status || fail=1
    exit $fail
    ;;

reload)
    if [ ! -x "$RELOAD_SCRIPT" ]; then
        log_failure_msg "The frr-pythontools package is required for reload functionality."
        exit 1
    fi

    # systemd doesn't set WATCHDOG_USEC for reload commands.
    watchfrr_pidfile="$V_PATH/watchfrr.pid"
    watchfrr_pid="`cat \"$watchfrr_pidfile\"`"
    watchfrr_cmdline="`tr '\0' '\n' < /proc/$watchfrr_pid/cmdline`"
    if [ -d "/proc/$watchfrr_pid" ]; then
        wdt="`tr '\0' '\n' < /proc/$watchfrr_pid/environ | grep '^WATCHDOG_USEC='`"
        wdt="${wdt#WATCHDOG_USEC=}"
        [ -n "$wdt" ] && : ${WATCHDOG_USEC:=$wdt}
        [ -n "$WATCHDOG_USEC" ] && export WATCHDOG_USEC
    fi

    # restart watchfrr to pick up added daemons.
    # NB: This will NOT cause the other daemons to be restarted.
    daemon_list enabled_daemons disabled_daemons
    watchfrr_options="$watchfrr_options $enabled_daemons"
    daemon_stop watchfrr && \
        daemon_start watchfrr

    # If we disable an arbitrary daemon and do reload,
    # disabled daemon is still running and we should stop it.
    for daemon in $disabled_daemons; do
        if grep -q "$daemon" <<< "$watchfrr_cmdline"; then
            daemon_stop "$daemon" &
            pids="$pids $!"
        fi
    done

    for pid in $pids; do
        wait "$pid"
    done

    # make systemd not kill watchfrr after ExecReload completes
    # 3 goats were sacrificed to restore sanity after coding this
    watchfrr_pid="`cat \"$watchfrr_pidfile\"`"
    if [ -f "/proc/$watchfrr_pid/cgroup" -a -d "/sys/fs/cgroup/systemd" ]; then
        cg="`egrep '^[0-9]+:name=systemd:' \"/proc/$watchfrr_pid/cgroup\"`"
        cg="${cg#*:*:}"

        cgmain="$cg"
        cgmain="${cgmain%/.control}"
        cgmain="${cgmain%/control}"

        [ -n "$cg" -a "$cg" != "$cgmain" ] && \
            echo "$watchfrr_pid" > "/sys/fs/cgroup/systemd/$cgmain/tasks"
    fi

    NEW_CONFIG_FILE="${2:-$C_PATH/frr.conf}"
    [ ! -r $NEW_CONFIG_FILE ] && log_failure_msg "Unable to read new configuration file $NEW_CONFIG_FILE" && exit 1
    "$RELOAD_SCRIPT" --reload --bindir "$D_PATH" --confdir "$C_PATH" --rundir "$V_PATH" "$NEW_CONFIG_FILE" `echo $nsopt`
    exit $?
    ;;

*)
    echo "Usage:"
    echo "    ${0} <start|stop|restart|force-reload|reload|status> [namespace]"
    echo "    ${0} stop namespace1"
    exit 1
    ;;
esac

if [ -r "/lib/lsb/init-functions" ]; then　　检查后面的文件是否可读，-read
    . /lib/lsb/init-functions　　　　　　　　　　如果可读，就包含进来，语法为. file，点和file之间有个空格，点也可以写为source
else
    log_success_msg() {
        echo "$@"
    }
fi