# $OpenBSD: cafebabe,v 1.3 2009/04/24 18:54:34 chl Exp $ #------------------------------------------------------------------------------ # Cafe Babes unite! # # Since Java bytecode and Mach-O fat-files have the same magic number, the test # must be performed in the same "magic" sequence to get both right. The long # at offset 4 in a mach-O fat file tells the number of architectures; the short at # offset 4 in a Java bytecode file is the JVM minor version and the # short at offset 6 is the JVM major version. Since there are only # only 18 labeled Mach-O architectures at current, and the first released # Java class format was version 43.0, we can safely choose any number # between 18 and 39 to test the number of architectures against # (and use as a hack). Let's not use 18, because the Mach-O people # might add another one or two as time goes by... # 0 beshort 0xcafe >2 beshort 0xbabe !:mime application/x-java-applet >4 belong >30 compiled Java class data, >>6 beshort x version %d. >>4 beshort x \b%d >>4 belong 1 Mach-O fat file with 1 architecture >>4 belong >1 >>>4 belong <20 Mach-O fat file with %ld architectures >2 beshort 0xd00d JAR compressed with pack200 !:mime application/x-java-pack200