+# Check command line options.
+# If any of them is invalid, exit the process.
+#
+def check_command_line
+ if (ARGV.length != 2)
+ usage
+ exit 2
+ end
+
+ if $options["daemon"]
+ $options["daemon"] = File.expand_path($options["daemon"], File.dirname(__FILE__))
+ unless is_writable_dir? $options["daemon"]
+ usage
+ $stderr.puts "Can not create a file in the daemon directory: %s" % [$options["daemon"]]
+ exit 5
+ end
+ end
+
+ $topdir = $options["daemon"] || File.expand_path(File.dirname(__FILE__))
+
+ if $options["player-log-dir"]
+ $options["player-log-dir"] = File.expand_path($options["player-log-dir"], $topdir)
+ unless is_writable_dir?($options["player-log-dir"])
+ usage
+ $stderr.puts "Can not write a file in the player log dir: %s" % [$options["player-log-dir"]]
+ exit 3
+ end
+ end
+
+ if $options["pid-file"]
+ $options["pid-file"] = File.expand_path($options["pid-file"], $topdir)
+ unless is_writable_file? $options["pid-file"]
+ usage
+ $stderr.puts "Can not create the pid file: %s" % [$options["pid-file"]]
+ exit 4
+ end
+ end
+
+ $options["floodgate-history"] ||= File.join($topdir, "floodgate_history.yaml")
+ $options["floodgate-history"] = File.expand_path($options["floodgate-history"], $topdir)
+ unless is_writable_file? $options["floodgate-history"]
+ usage
+ $stderr.puts "Can not create the floodgate history file: %s" % [$options["floodgate-history"]]
+ exit 6
+ end
+end
+
+# See if the file is writable. The file will be created if it does not exist
+# yet.
+# Return true if the file is writable, otherwise false.
+#
+def is_writable_file?(file)
+ if File.exist?(file)
+ if FileTest.file?(file)
+ return FileTest.writable_real?(file)
+ else
+ return false
+ end
+ end
+
+ begin
+ open(file, "w") {|fh| }
+ FileUtils.rm file
+ rescue
+ return false
+ end
+
+ return true
+end
+
+# See if a file can be created in the directory.
+# Return true if a file is writable in the directory, otherwise false.
+#
+def is_writable_dir?(dir)
+ unless File.directory? dir
+ return false
+ end
+
+ result = true
+
+ begin
+ temp_file = Tempfile.new("dummy-shogi-server", dir)
+ temp_file.close true
+ rescue
+ result = false
+ end
+
+ return result
+end
+