CentOS7の/sbin/service
if [ -f "${SERVICEDIR}/${SERVICE}" ]; then env -i PATH="$PATH" TERM="$TERM" SYSTEMCTL_IGNORE_DEPENDENCIES=${SYSTEMCTL_IGNORE_DEPENDENCIES} SYSTEMCTL_SKIP_REDIRECT=${SYSTEMCTL_SKIP_REDIRECT} "${SERVICEDIR}/${SERVICE}" ${ACTION} ${OPTIONS} elif [ -x "${ACTIONDIR}/${SERVICE}/${ACTION}" -a -n "${ACTION}" ]; then env -i PATH="$PATH" TERM="$TERM" SYSTEMCTL_IGNORE_DEPENDENCIES=${SYSTEMCTL_IGNORE_DEPENDENCIES} SYSTEMCTL_SKIP_REDIRECT=${SYSTEMCTL_SKIP_REDIRECT} "${ACTIONDIR}/${SERVICE}/${ACTION}" ${OPTIONS} elif `echo $ACTION | egrep -qw "start|stop|restart|try-restart|reload|force-reload|status|condrestart"` ; then echo $"Redirecting to /bin/systemctl ${ACTION} ${OPTIONS} ${SERVICE}.service" >&2 exec /bin/systemctl ${ACTION} ${OPTIONS} ${SERVICE}.service else echo $"The service command supports only basic LSB actions (start, stop, restart, try-restart, reload, force-reload, status). For other actions, please try to use systemctl." >&2 exit 2 fi
となっているので、
/sbin/service ${service} ${action}
とした場合、
/etc/init.d/${service}
があれば
/etc/init.d/${service} ${action}
を実行。
/usr/libexec/initscripts/legacy-actions/${service}/${action}
があれば
/usr/libexec/initscripts/legacy-actions/${service}/${action}
を実行。
${action}が
start|stop|restart|try-restart|reload|force-reload|status|condrestart
のどれかだったら
/bin/systemctl ${action} ${service}.service
を実行ということになる。
/usr/libexec/initscripts/legacy-actionsにはhttpdのconfigtestやgracefulがあったりするので、
/sbin/service httpd configtest
とかを実行可能である。