编辑文件 - 40-systemd

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路径: /snap/core22/2411/usr/lib/lsb/init-functions.d/40-systemd
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# -*-Shell-script-*-
# /lib/lsb/init-functions

_use_systemctl=0
if [ -d /run/systemd/system ]; then

if [ -n "${__init_d_script_name:-}" ]; then # scripts run with new init-d-script
        executable="$__init_d_script_name"
        argument="$1"
    elif [ "${0##*/}" = "init-d-script" ] ||
         [ "${0##*/}" = "${1:-}" ]; then # scripts run with old init-d-script
        executable="$1"
        argument="$2"
    else # plain old scripts
        executable="$0"
        argument="${1:-}"
    fi

prog=${executable##*/}
    service="${prog%.sh}.service"

# Don't try to run masked services. systemctl <= 230 always succeeds here,
    # but later systemctls fail on nonexisting units; be compatible with both
    state=$(systemctl -p LoadState --value show $service 2>/dev/null) || state="not-found"
    [ "$state" = "masked" ] && exit 0

# Redirect SysV init scripts when executed by the user
    if [ $PPID -ne 1 ] && [ -z "${SYSTEMCTL_SKIP_REDIRECT:-}" ]; then
        case $(readlink -f "$executable") in
            /etc/init.d/*)
                # If the state is not-found, this might be a newly installed SysV init
                # script where systemd-sysv-generator has not been run yet.
                [ "$state" != "not-found" ] || [ "$(id -u)" != 0 ] || systemctl --no-ask-password daemon-reload

_use_systemctl=1
                # Some services can't reload through the .service file,
                # but can through the init script.
                if [ "$(systemctl -p CanReload --value show $service 2>/dev/null)" = "no" ] && [ "${argument:-}" = "reload" ]; then
                    _use_systemctl=0
                fi
                ;;
        esac
    fi
fi

systemctl_redirect () {
    local s
    local rc
    local prog=${1##*/}
    local command=$2

case "$command" in
        start)
            s="Starting $prog (via systemctl)"
            ;;
        stop)
            s="Stopping $prog (via systemctl)"
            ;;
        reload|force-reload)
            s="Reloading $prog configuration (via systemctl)"
            ;;
        try-restart)
            s="Restarting $prog if running (via systemctl)"
            ;;
        restart)
            s="Restarting $prog (via systemctl)"
            ;;
    esac

service="${prog%.sh}.service"

# avoid deadlocks during bootup and shutdown from units/hooks
    # which call "invoke-rc.d service reload" and similar, since
    # the synchronous wait plus systemd's normal behaviour of
    # transactionally processing all dependencies first easily
    # causes dependency loops
    if ! systemctl --quiet is-system-running && [ "$command" = "reload" ]; then
        sctl_args="--no-block"
    fi

[ "$command" = status ] || log_daemon_msg "$s" "$service"
    systemctl --no-pager $sctl_args $command "$service"
    rc=$?
    [ "$command" = status ] || log_end_msg $rc

return $rc
}

if [ "$_use_systemctl" = "1" ]; then
    # Some init scripts use "set -e" and "set -u", we don't want that
    # here
    set +e
    set +u

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