ook een versie voor slocate en mooi opties afhandelen

mlocatedb-dump/mlocatedb-dump.rb

@@ -8,8 +8,43 @@
 
 # Zie ook: http://linux.die.net/man/5/mlocate.db
 
-# Geen argumenten. Probeert gewoon een bestand met de naam 'mlocate.db'
+require "getoptlong"
-# in de huidige dir te openen
+
+def parse_options
+	@options = {}
+	begin
+		opts = GetoptLong.new(
+			[ "-i",                 GetoptLong::REQUIRED_ARGUMENT ],
+			[ "-h", "--help",       GetoptLong::NO_ARGUMENT ]
+		)
+		opts.quiet=true
+		opts.each do |opt, arg|
+			@options[opt] = arg
+		end
+		if @options["-h"]
+			usage
+		end
+	rescue GetoptLong::InvalidOption
+		print "#{$!}\n"
+		usage 
+	end
+	# default values
+	if @options["-i"].nil?
+		@options["-i"] = "slocate.db"
+	end
+	return @options
+end
+
+def usage
+	print <<XXX
+Usage: slocatedb-dump.rb [-i <inputfile>] [-l] [-h]
+
+-i <inputfile>	use <inputfile> for input (default: slocate.db)
+-h		this help message
+XXX
+	exit
+end
+
 
 def arr2long(arr)
 	return (arr[0]<<24) + (arr[1]<<16) + (arr[2]<<8) + arr[3]
@@ -23,8 +58,9 @@ def arr2string(arr)
 	return string
 end
 
+parse_options
 
-fh = File.new("mlocate.db", "r")
+fh = File.new(@options["-i"], "r")
 
 magic_number=fh.read(8)
 if magic_number == "\000mlocate"
@@ -91,6 +127,10 @@ while true
 
 			curdir=''
 			while (b=fh.read(1)) != "\000"
+				if b.nil?
+					# we're done
+					exit
+				end
 				curdir += b
 			end
 			puts "#{curdir}/"

slocatedb-dump/slocatedb-dump.rb

@@ -0,0 +1,90 @@
+#!/usr/bin/env ruby
+
+# $Id$
+# $URL$
+
+# Parser voor slocate.db bestanden. Toont een filelisting van alle bestanden
+# uit de database.
+
+require "getoptlong"
+
+def parse_options
+	@options = {}
+	begin
+		opts = GetoptLong.new(
+			[ "-i",			GetoptLong::REQUIRED_ARGUMENT ],
+			[ "-h", "--help",	GetoptLong::NO_ARGUMENT ],
+			[ "-l",			GetoptLong::NO_ARGUMENT ]
+		)
+		opts.quiet=true
+		opts.each do |opt, arg|
+			@options[opt] = arg
+		end
+		if @options["-h"]
+			usage
+		end
+	rescue GetoptLong::InvalidOption
+		print "#{$!}\n"
+		usage
+	end
+	# default values
+	if @options["-l"].nil?
+		@options["-l"] = false
+	end
+	if @options["-i"].nil?
+		@options["-i"] = "slocate.db"
+	end
+	return @options
+end
+
+def usage
+	print <<XXX
+Usage: slocatedb-dump.rb [-i <inputfile>] [-l] [-h]
+
+-i <inputfile>	use <inputfile> for input (default: slocate.db)
+-l		parse as traditional locate database format (default slocate.db style)
+-h		this help message
+XXX
+	exit
+end
+
+
+def signedbyte(byte)
+	if byte >= 128
+		((byte^0xff)+1)*-1
+	else
+		byte
+	end
+end
+
+parse_options
+
+fh = File.new(@options["-i"], "r")
+
+# dit byte schijnt heel het verschil te zijn met traditionele locate databases
+# dus bij een traditionele even 4 regels niet gebruiken
+if ! @options["-l"]
+	secure=fh.read(1)
+	if secure == '1'
+		puts "Uses security features..."
+	end
+end
+
+curdepth=0
+curpaths=""
+while true
+	char = fh.read(1)
+	if char.nil?
+		# we're done
+		exit
+	end
+	depth = signedbyte(char[0])
+	curdepth+=depth
+	curpaths=curpaths[0...curdepth]
+	newname=''
+	while(b=fh.read(1)) != "\000"
+		newname += b
+	end
+	curpaths+=newname
+	puts curpaths
+end