[launchd-dev] WatchEvents and unlink

[Alfred Labrie]

Hello

Another workaround is to replace the file content with "", then write
later at that path.

As I said, this is new behavior and sounds like a bug:
rdar://problem/7787489

Thank you anyway.

Regards.


On Tue, Mar 23, 2010 at 5:52 PM, dreamcat four <dreamcat4 at gmail.com> wrote:
> Hi,
> WatchPaths has always been a little bit touchy / unpredictable. But
> not unsolvable.
>
> Maybe you would have better luck to make the WatchPath the parent Dir,
> and not the file itself. Then then that file got deleted it wouldnt
> matter so much. And if you don't wish to watch other files within the
> same enclosing directory, then how about creating an alternate path,
> and just symlinking only the one file you are interested in?
>
> I don't have any answer for your question, except to go search in the
> Launchd source code. But personally I wouldn't waste your time if you
> can just bjork the thing into working with these other tactics.
>
> On Tue, Mar 23, 2010 at 4:24 PM, Alfred Labrie <alfred.labrie at gmail.com> wrote:
>> Hello
>>
>> I am sorry to "bump" but I am really wondering if it is normal behavior.
>>
>> Please help.
>>
>> A.
>>
>>
>> On Wed, Mar 17, 2010 at 3:03 PM, Alfred Labrie <alfred.labrie at gmail.com> wrote:
>>> Hello
>>>
>>> It sounds like there is a new behavior with WatchEvents on Snow Leopard.
>>>
>>> Let's say, I watch for this file path: "/private/tmp/watch"
>>> - if I create the file, launch daemon is triggered
>>> - if I write + close the file, launch daemon is triggered
>>> - if I remove the file then I create a new file, launch daemon is no
>>> longer triggered
>>>
>>> On Leopard, remove then create the file would trigger the launch daemon.
>>>
>>> Typical watch.plist syntax would be:
>>> ...
>>> <dict>
>>>        <key>KeepAlive</key>
>>>        <false/>
>>>        <key>Label</key>
>>>        <string>inc.ninja.watch</string>
>>>        <key>ProgramArguments</key>
>>>        <array>
>>>                <string>/path/to/execute</string>
>>>        </array>
>>>        <key>WatchPaths</key>
>>>        <array>
>>>                <string>/private/tmp/watch</string>
>>>        </array>
>>> </dict>
>>> </plist>
>>>
>>> This is tested on Mac OS X 10.6.2 and above. Is it by design or is it a bug?
>>>
>>> Regards.
>>>
>> _______________________________________________
>> launchd-dev mailing list
>> launchd-dev at lists.macosforge.org
>> http://lists.macosforge.org/mailman/listinfo.cgi/launchd-dev
>>
>