Thiago Macieira wrote:
>> You're missing a detail. On OS X, $TMPDIR (and QDir::tempPath()) *are* user
>> specific. They're also very "immemorable"...
>
> They're not required to be. If we can detect that they are, then sure, we
> could use it as XDG_RUNTIME_DIR.
>> > It could be a subdir of $TMPDIR, but then we run into a race condition
>> > problem of creating a secure subdir with a well-established name among
>> > applications. That's why the XDG spec says that XDG_RUNTIME_DIR *must*
>> > have been created when the user logs in and must be removed when the user
>> > fully logs out.
It sounds like all this is hard to enforce without checking before returning a
location. NB: that's what KDE does with the directory that is supposed to act
as ... the trashbin!
Note that OS X has NSString *NSTemporaryDirectory(), and also that QSP is
already half set up to determine TempLocation via kTemporaryFolderType :
kTemporaryFolderType = 'temp', /* On Mac OS X, each user has their own
temporary items folder, and the Folder Manager attempts to set permissions of
these*/
/* folders such that other users can not access
the data inside. On Mac OS X 10.4 and later the data inside the temporary*/
/* items folder is deleted at logout and at
boot, but not otherwise. Earlier version of Mac OS X would delete items
inside*/
/* the temporary items folder after a period of
inaccess. You can ask for a temporary item in a specific domain or on a */
/* particular volume by FSVolumeRefNum. If you
want a location for temporary items for a short time, then use either*/
/* ( kUserDomain, kkTemporaryFolderType ) or (
kSystemDomain, kTemporaryFolderType ). The kUserDomain varient will always be*/
/* on the same volume as the user's home folder,
while the kSystemDomain version will be on the same volume as /var/tmp/ ( and*/
/* will probably be on the local hard drive in
case the user's home is a network volume ). If you want a location for a
temporary*/
/* file or folder to use for saving a document,
especially if you want to use FSpExchangeFile() to implement a safe-save, then*/
/* ask for the temporary items folder on the
same volume as the file you are safe saving.*/
/* However, be prepared for a failure to find a
temporary folder in any domain or on any volume. Some volumes may not have*/
/* a location for a temporary folder, or the
permissions of the volume may be such that the Folder Manager can not return*/
/* a temporary folder for the volume.*/
/* If your application creates an item in a
temporary items folder you should delete that item as soon as it is not
needed,*/
/* and certainly before your application exits,
since otherwise the item is consuming disk space until the user logs out or*/
/* restarts. Any items left inside a temporary
items folder should be moved into a folder inside the Trash folder on the disk*/
/* when the user logs in, inside a folder named
"Recovered items", in case there is anything useful to the end user.*/
The only open question is what `macLocation` domain should be returned by
QSP::TempLocation: kUserDomain, kSystemDomain or kOnAppropriateDisk .
Maybe Jake Petroules already addressed that question?
R.
_______________________________________________
Development mailing list
[email protected]
http://lists.qt-project.org/mailman/listinfo/development
