##
# Load files needed by the scenario via TFTP
#
# \param --load-tftp-base-dir     base directory of TFTP
# \param --load-tftp-offset-dir   offset directory within TFTP
# \param --load-tftp-absolute     path is absolute, i.e. /base_dir/offset_dir
#                            instead of only /offset_dir is used
#

source [genode_dir]/tool/run/load.inc


##
# The files are loaded implicitly via TFTP to the target machine
#
proc run_load { } {
	global load_spawn_id
	set load_spawn_id -1
	return true
}


proc load_tftp_base_dir { } { return [get_cmd_arg --load-tftp-base-dir ""] }


proc load_tftp_offset_dir { } { return [get_cmd_arg --load-tftp-offset-dir ""] }


proc load_tftp_use_absolute { } { return [get_cmd_switch --load-tftp-absolute] }


##
# Install files needed to boot via PXE
#
proc install_pxe_bootloader_to_run_dir { } {
	exec mkdir -p [run_dir]/boot
	exec cp [genode_dir]/tool/boot/pulsar [run_dir]/boot/pulsar
	exec chmod a+r [run_dir]/boot/pulsar
	exec cp [genode_dir]/tool/boot/bender [run_dir]/boot/bender
	exec chmod a+r [run_dir]/boot/bender
}


##
# Generate pulsar config file used for loading files from TFTP
#
proc generate_tftp_config { } {
	set tftp_base_dir [load_tftp_base_dir]
	set tftp_offset_dir [load_tftp_offset_dir]

	if {[string length $tftp_base_dir] > 0 && [string length $tftp_offset_dir] > 0} {

		# if the link target exists as directory this leads to bad behavior
		if {[file exists $tftp_base_dir$tftp_offset_dir] &&
		    [string compare [file type $tftp_base_dir$tftp_offset_dir] "directory"] == 0} {

			puts stderr "Error: TFTP symlink target $tftp_base_dir$tftp_offset_dir is a directory"
			exit -1
		}
		exec ln -nfs "[pwd]" "$tftp_base_dir$tftp_offset_dir"

		set tftp_base ""
		if {[load_tftp_use_absolute]} {
			set tftp_base $tftp_base_dir
		}

		set fh [open "$tftp_base_dir$tftp_offset_dir/config-00-00-00-00-00-00" "WRONLY CREAT TRUNC"]
		puts $fh " root $tftp_base$tftp_offset_dir/[run_dir]"
		puts $fh " config config-52-54-00-12-34-56"
		close $fh
	} else {
		puts "Warning, TFTP base directory or TFTP offset directory not set."
	}
}