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From bugzi...@apache.org
Subject DO NOT REPLY [Bug 47821] Touch task doesn't work on Solaris for a file which you do not own
Date Mon, 14 Sep 2009 11:43:24 GMT
https://issues.apache.org/bugzilla/show_bug.cgi?id=47821

Johan Corveleyn <johan_corveleyn@hotmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |REOPENED
         Resolution|WONTFIX                     |

--- Comment #2 from Johan Corveleyn <johan_corveleyn@hotmail.com> 2009-09-14 04:43:18
PDT ---
I understand this is difficult to do, and cannot be done without using
platform-specific Runtime.exec code. It's a pity that the Java api doesn't
offer you a way to do this. 

But isn't there a way you could do the following, in the touch task, when no
datetime argument is given?
* Try setLastModified(System.currentTimeMillis())
* If that fails (i.e. returns false), and the platform is unix, try a
Runtime.exec of touch?

At the very least, touch should raise an error when it fails to set the
timestamp. File.setLastModified returns a boolean to indicate whether or not it
succeeded. This return value is currently ignored. Can you use that return
value to raise an error if needed? 

Maybe this could also be documented in the manual for the touch task?

Some background: in our build environment, this issue has caused serious
problems after we switched from Linux to Solaris, and it was hard to find out
what exactly went wrong. We used the copy task to deploy a new build to a
JavaWebStart server. By default, the copy task only copies newer files, if they
already exist on the target location. Because the touch failed, sometimes old
files (which needed to be redeployed) were not copied. It took us quite some
time to figure out why it failed, and to replace all touch tasks with <exec ...
/>.

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