getting a user's trash folders

In article <1gh6aj6.1uluvng71m328N%noreply@dds.nl>,
noreply RemoveThis @dds.nl (Patrick Machielse) wrote:

> (2) CARBON
> OSErr FSFindFolder (
> short vRefNum,
> OSType folderType,
> Boolean createFolder,
> FSRef *foundRef
> )
>
> Here, there are 3 possible values for 'folderType':
> - kTrashFolderType = 'trsh',

This is tho one you want.

For user's files in the home directory, pass kUserDomain for the first
parameter. For other volumes, use the actual volume reference number,
like this:

// path = some valid path to a file/folder on a secondary volume
FSRef file;
FSPathMakeRef(path, &file, NULL);
FSCatalogInfo info;
FSGetCatalogInfo(&file, kFSCatInfoVolume, &info, 0, 0, 0);
FSFindFolder(info.volume, 'trsh', false, &file);

This should give you the trash folder for that volume, but be sure to
check all the error codes because not every kind of volume uses a trash
folder.

-Chad

Gregory Weston <gwestonREMOVE.TakeThisOut@CAPSattbi.com> wrote:

> (Patrick Machielse) wrote:
>
> > I want to get the current user's trash folders.
>
> For the volumes hosting ~, the trash is in "~/.Trash".
> For every local volumes other than that, the trash is in
> "/Volumes/<volname>/.Trashes/<uid>"
> For networked volumes, trashed items are deleted immediately.

Thanks, that seems to be right. Do you by any chance have a URL to
Apple's documentation?

Patrick

Chad M <huskerchad.DeleteThis@removethis.andthistoo.insightbb.com> wrote:

> For user's files in the home directory, pass kUserDomain for the first
> parameter. For other volumes, use the actual volume reference number,
> like this:
>
> // path = some valid path to a file/folder on a secondary volume
> FSRef file;
> FSPathMakeRef(path, &file, NULL);
> FSCatalogInfo info;
> FSGetCatalogInfo(&file, kFSCatInfoVolume, &info, 0, 0, 0);
> FSFindFolder(info.volume, 'trsh', false, &file);
>
> This should give you the trash folder for that volume, but be sure to
> check all the error codes because not every kind of volume uses a trash
> folder.

Thanks Chad, I'll check this out. It seems that I have to do most of the
work myself:

- enumerate the volumes
- single out the volume with the user's home folder
(may not be the startup volume)
- use FSFolder and check return value.

In the end it should be more robust than constructing the paths 'by
hand' though.

I think I will file an enhancement request for
NSSearchPathForDirectoriesInDomains because I think it really should
support getting the trash folders.

Patrick

In article <1gh7xop.11l94trbcvhz2N%noreply@dds.nl>,
noreply DeleteThis @dds.nl (Patrick Machielse) wrote:

> Gregory Weston <gwestonREMOVE DeleteThis @CAPSattbi.com> wrote:
>
> > (Patrick Machielse) wrote:
> >
> > > I want to get the current user's trash folders.
> >
> > For the volumes hosting ~, the trash is in "~/.Trash".
> > For every local volumes other than that, the trash is in
> > "/Volumes/<volname>/.Trashes/<uid>"
> > For networked volumes, trashed items are deleted immediately.
>
> Thanks, that seems to be right. Do you by any chance have a URL to
> Apple's documentation?

This is not documented. It has changed in the past. You would be foolish to rely
on it. Also, it is not entirely correct, as AFP support server trash, and does
not require trashed items on network volumes to be deleted immediately.

Do not hardcode these names into your code. At the very least, you should use
"kSystemTrashFolderType" and "kTrashFolderType", iterating over volumes.
However, you should note that even with administrative privileges you may not
have permission to read, much less modify, every conceivable trash on every
accessible volume.

Which brings me to my main point: what are you really trying to do?

meeroh

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Miro Jurisic <macdev.RemoveThis@meeroh.org> wrote:

> > Thanks, that seems to be right. Do you by any chance have a URL to
> > Apple's documentation?
>
> This is not documented. It has changed in the past. You would be foolish
> to rely on it. Also, it is not entirely correct, as AFP support server
> trash, and does not require trashed items on network volumes to be deleted
> immediately.

A documentation enhancement request seems to be in order, then.

> Do not hardcode these names into your code. At the very least, you should use
> "kSystemTrashFolderType" and "kTrashFolderType", iterating over volumes.

What is the best way to iterate over the mounted volumes? (is there a
standard way to do this in Carbon. I don't want to link with AppKit (for
NSWorkSpace) )

> Which brings me to my main point: what are you really trying to do?

I'm writing an app that manages the trash for the current user. So I'm
really only interested in the trash locations for that user. Sofar my
code looks like this:

// get an array of paths to user trash folders
NSMutableArray *trashes = [NSMutableArray array];

// enumerate volumes on mount point /Volumes/
NSEnumerator *e = [[self mountedVolumes] objectEnumerator];
NSString *volumePath;
while ( volumePath = [e nextObject] ) {
// make volume FSRef
FSRef volRef;
if (noErr != FSPathMakeRef([volumePath UTF8String], &volRef, NULL))
continue;

// get volume info from volume FSRef
FSCatalogInfo info;
if (noErr != FSGetCatalogInfo(&volRef, kFSCatInfoVolume, &info,
NULL, NULL, NULL))
continue;

// get trash FSRef on the volume
FSRef trashRef;
if (noErr != FSFindFolder(info.volume, kTrashFolderType,
kDontCreateFolder, &trashRef))
continue;

// add path from trash FSRef to 'trashes'
UInt8 path[256];
if (noErr == FSRefMakePath(&trashRef, path, 255)) {
[trashes addObject:[NSString stringWithUTF8String:(const char
*)path]];
}
}

where [self mountedVolumes] returns an array of volume names (like
@"/Volumes/startup" etc.). I'm not sure about the last step, turning the
UInt8 array into an NSString, but I believe this is the right way, and
sofar it works...

Patrick

In article <1gh9vfg.1d1ibsq1fv4sv4N%noreply@dds.nl>,
noreply.TakeThisOut@dds.nl (Patrick Machielse) wrote:

> Miro Jurisic <macdev.TakeThisOut@meeroh.org> wrote:
>
> > > Thanks, that seems to be right. Do you by any chance have a URL to
> > > Apple's documentation?
> >
> > This is not documented. It has changed in the past. You would be foolish
> > to rely on it. Also, it is not entirely correct, as AFP support server
> > trash, and does not require trashed items on network volumes to be deleted
> > immediately.
>
> A documentation enhancement request seems to be in order, then.

For what? I didn't see any place in Apple documentation where names of trash
folders were listed...

> > Do not hardcode these names into your code. At the very least, you should
> > use "kSystemTrashFolderType" and "kTrashFolderType", iterating over
> > volumes.
>
> What is the best way to iterate over the mounted volumes? (is there a
> standard way to do this in Carbon. I don't want to link with AppKit (for
> NSWorkSpace) )

FSGetVolumeInfo

meeroh

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If this message helped you, consider buying an item
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