Apple

I still haven’t found a way to get a file descriptor for a symlink (not the target file) on Tiger. I need to use this as the event identifier when I call kqueue() with the EVFILT_VNODE filter. Does anyone know how to either get the file descriptor for the symlink or is there a way to pass in something else as the identifier to the kqueue function?

Thanks

From: Trainor, Chris
Sent: Monday, October 27, 2008 5:26 PM
To: 'Jim Luther'
Cc: email@hidden
Subject: RE: How to get a file descriptor for a symlink?

I actually need to get the file descriptor so that I can pass it to kqueue().

Thanks

From: Jim Luther [mailto:email@hidden]
Sent: Monday, October 27, 2008 4:33 PM
To: Trainor, Chris
Cc: email@hidden
Subject: Re: How to get a file descriptor for a symlink?

Chris,

Assuming you want the contents of a symlink file, use readlink(2).

- Jim

On Oct 27, 2008, at 11:58 AM, Trainor, Chris wrote:

I am trying to call the open() function on a symlink to get a file descriptor. I need to open the symlink file, not the target. I can use the O_SYMLINK flag on Leopard to get this behavior, but that flag is not available on Tiger. I initially thought O_NOFOLLOW would do what I wanted, but then realized that is not what it is meant to do. It is supposed to cause the open() call to fail if the file is a symlink. It behaves this way on Leopard, but it appears to be broken on Tiger. Calling open() on Tiger seems to just ignore the O_ NOFOLLOW flag.

Any suggestions?

Thanks

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