RFR [6943190] TEST_BUG: java/lang/Runtime/exec/ExecWithInput.java hardcodes path to cat

[Ivan Gerasimov]

On 24.02.2014 23:38, Martin Buchholz wrote:
> Thanks for working on these ancient Process tests.
> I would prefer to see them using "feature tests".
>
> You wanna do "cat /dev/zero"?  Then look for cat in /bin and /usr/bin 
> and check for /dev/zero as well, e.g. using File.isExecutable
>
OK. Here's another iteration.
I introduced a utility class UnixCommands, which encapsulates searching 
for the command under several fixed directories.

I didn't touch /dev/null though.  I think we can assume it exists in 
every Unix system.  Many other tests depend on it anyways.

Would you please have a chance to review the updated wevrev?
http://cr.openjdk.java.net/~igerasim/6943190/1/webrev/

Sincerely yours,
Ivan

> Doing OS-specific things like:
>
> +    static final boolean isLinux =
> +            System.getProperty("os.name  <http://os.name>", "unknown").startsWith("Linux");
>
> should be a last resort.
>
>
> On Mon, Feb 24, 2014 at 9:26 AM, Ivan Gerasimov 
> <ivan.gerasimov at oracle.com <mailto:ivan.gerasimov at oracle.com>> wrote:
>
>     Hello!
>
>     We've got one quite old report about been unable to run the test
>     under Android.
>     https://bugs.openjdk.java.net/browse/JDK-6943190
>
>     That was due to hard-coded path to the cat utility as /bin/cat.
>     When investigating, I found two other tests under the same
>     directory that use /usr/bin/cat and /usr/bin/echo.
>     These two test seem to (almost) never run because of the unusual path.
>
>     Here's the first version of the webrev, with the fix to only three
>     tests mentioned above:
>     http://cr.openjdk.java.net/~igerasim/6943190/0/webrev/
>     <http://cr.openjdk.java.net/%7Eigerasim/6943190/0/webrev/>
>
>     java/lang/Runtime/exec/ directory has also got several other
>     tests, which run shell commands.
>     Some of them have absolute path and some of them don't.
>
>     So I have a general question: Why would we ever need the absolute
>     path for the commands?
>     Why wouldn't we rely on the PATH env variable?
>
>     Sincerely yours,
>     Ivan
>
>
>