########################################################################
# Description : Gnu Makefile to control the services in the specified
#               runlevel. It will run the required services, and log
#               the output of the services to the file
#               /var/log/initd.start (for service startup) and
#               /var/log/initd.stop (for service shutdown).
#
#               This controlling program is designed to be invoked by
#               the "/etc/rc.d/rc" script.
#
# Author      : jameshunt@uk.ibm.com
# Modified by : <b style="color:black;background-color:#ffff66">Mark Tiefenbruck</b> <pythagosaurus@gmail.com>
#
# Notes       :
#
# - Run as,
#
#    make [-n] -j -k -f runlevel.mk \
#        RUNLEVEL={0|1|2|3|4|5|6} \
#        JOB={start|stop|restart|status}
#
# - $(JOB) is not validated - that is left to the service program.
# - $(RUNLEVEL) is not validated - that is left to the calling program
#   (usually /etc/rc.d/rc).
#
########################################################################

# passed as a parameter
RUNLEVEL =

# passed as a parameter (start, stop, status, etc)
JOB =

########################################################################
# START CONFIGURATION

# system commands used by this facility
CAT               = /bin/cat
RM                = /bin/rm
ECHO              = /bin/echo
DATE              = /bin/date

# Directory containing scripts/programs to run.
INITD_DIR         = /etc/rc.d/rc$(RUNLEVEL).d

# Directory into which a lock file is created when a service starts.
# (Note that the lock file is created by the service).
SUBSYS_FILE_DIR  := /var/lock/subsys

# Used to create temporary files, before collating them all into 
# $(FINAL_OUTPUT_FILE).
TMP_DIR          := /tmp

TMPFILE_PREFIX   := .runlevel
TMP_FILE          = $(TMP_DIR)/$(TMPFILE_PREFIX).$(JOB).$@

# File that contains all output of programs/scripts run.
FINAL_OUTPUT_FILE = /var/log/initd.$(JOB)

start	= S
stop	= K
ALL	= $(patsubst $(INITD_DIR)/%,%,$(shell ls $(INITD_DIR)/$($(JOB))*))

# END CONFIGURATION
########################################################################

# Check command-line parameters
ifndef RUNLEVEL
$(error must specify RUNLEVEL, so I know what to run)
endif

ifndef JOB
$(error must specify JOB, so I know what to do)
endif

default	: $(ALL) create_final_output_file

# Generic rule to control a service.
$(ALL)	: $(SUBSYS_FILE_DIR)/$@
		@$(ECHO) "Begin \"$(JOB) $@\" at `$(DATE)`" >  $(TMP_FILE)
		@$(INITD_DIR)/$@ $(JOB) 2>&1	            >> $(TMP_FILE)
		@$(ECHO) "End \"$(JOB) $@\" at `$(DATE)`"   >> $(TMP_FILE)

# Include the relevant dependencies. Note that the dependencies for stopping
# services are usually opposite those for starting services.
#
# WARNING: including a file that does not exist will cause make to exit. This
# may cause your system to boot in an unfamiliar way.
include /etc/rc.d/$(JOB)$(RUNLEVEL).mk

# Lastly, merge all the service output files into a single file.
# Note that the order of the service output in the merged file is not
# chronological.
create_final_output_file : $(ALL)
		$(CAT) $(TMP_DIR)/$(TMPFILE_PREFIX).$(JOB).* \
			> $(FINAL_OUTPUT_FILE)
		$(RM) -f $(TMP_DIR)/$(TMPFILE_PREFIX).$(JOB).*

# EOF