RFR: 7178922 : (props) re-visit how os.name is determined on Mac

Alan Bateman Alan.Bateman at oracle.com
Wed Nov 14 09:59:34 UTC 2012

On 13/11/2012 22:50, Brent Christian wrote:
> At present, the JDK port for OS X gets its value for os.name from a 
> JRS function exported by the Apple Java Runtime Support framework.
> Historically this has either been "Mac OS X", or "Mac OS X Server", 
> but there have been reports that this could change at any time, e.g.
> to just "OS X".  This would break any app that relies on this property
> to detect the Mac platform using something like:
> System.getProperty("os.name").startsWith("Mac").
> To ensure compatibility going forward, the os.name System property on 
> Mac should be hard-coded to the value that is expected, "Mac OS X". 
> (FWIW, as of 10.7 Mac OS X Server is no longer a separate edition of 
> the OS).
> Webrev is here:
> http://cr.openjdk.java.net/~bchristi/7178922/webrev.0/
> Note: the setUnknownOSAndVersion() function is unused following my 
> change, so I went ahead and removed it.
> Thanks,
> -Brent
This might be a question for the MacOSX folks but is it safe to continue 
to depend on JavaRuntimeSupport period? I'm just wondering if we really 
need to use it to determine the OS version and locale?


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