Check existence of assign

Hi,

Is there a function or way to check if a particular assign exists ? I want to do this from within an application but transparently so that the "Please insert volume... in any drive" requester does not pop up.

I think I could use SystemTagList() to run the assign command with the EXISTS option and send the output to a file I could then examine but his seems a rather long way around way of doing things.

Any ideas.


Bill.

@BillE

A IDOS->Lock() might work?

Anyway you could do something like this, perhaps not the best way but it's a way:

@orgin

There is IDOS->FindDosEntry doing it easier.

@BillE

You can move -1 to pr_WindowPtr to avoid requesters.

Bye,
Thomas

@thomas

And since OS4 there is

@BillE

APTR oldwin = IDOS->SetProcWindow((APTR)-1);
BPTR lock = IDOS->Lock(assign_name,SHARED_LOCK);
IDOS->UnLock(lock); /* 0 safe */
IDOS->SetProcWindow(oldwin);

if( lock )
{
IDOS->Printf("%s exists\n",assign_name);
}
else
{
IDOS->Printf("%s does not exist\n",assign_name);
}

@Thread


Thanks to all those that replied.

Basically all I needed to do was check if a file within an assign exists but without the requester popping up if the assign does not exist on someone's system.

APTR oldwin = IDOS->SetProcWindow((APTR)-1);
/* Do the stuff I want here */
IDOS->SetProcWindow(oldwin);

That does the trick - perfect

The function also looks useful for ensuring any requesters which I do want to keep will open on the application's screen instead of Workbench.

Excellent, thanks for the suggestions.



Bill.