RFR: 8272600: (test) Use native "sleep" in Basic.java [v3]

[Roger Riggs]

On Tue, 31 Aug 2021 01:12:40 GMT, David Holmes <dholmes at openjdk.org> wrote:

>> Roger Riggs has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Revised to use native /bin/sleep program on Unix* (non-Windows).
>>   For Windows, a native "BasicSleep" program is used.
>
> test/jdk/java/lang/ProcessBuilder/Basic.java line 2646:
> 
>> 2644:         if (exePath.toFile().canExecute()) {
>> 2645:             return exePath;
>> 2646:         }
> 
> Not sure why this is so elaborate when elsewhere in the test we just assume `/usr/bin/env` exists?

True enough, will simplify.  At one point, I was going to name the BasicSleep just "sleep" and put the native path at the end of a search list. Some other executables are not reliably in the same directories in all Unix versions.

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PR: https://git.openjdk.java.net/jdk/pull/5239