Re: Symlink indirection

From: Jeff Bailey (
Date: Fri Dec 13 2002 - 11:51:46 EST

On Fri, 2002-12-13 at 10:23, Richard B. Johnson wrote:

> Since a symlink is just a file containing a name, the resulting path
> length is simply the maximum path length that user-space tools allow.
> This should be defined as "PATH_MAX". Posix defines this as 255 characters
> but I think posix requires that this be the minimum and all file-name
> handling buffers must be at least PATH_MAX in length.

Small nit here, the Posix draft I have says that the definition shall be
omitted from the <limits.h> header on specific implementation where the
corresponding value is equal or greater than the stated minimum, but
where the value can vary depending on the file to which it is applied.

Please don't ever rely on PATH_MAX existing. pathconf() is a better
tool. We spend a lot of time chasing authors to explain to them why it
really is okay for the Hurd (i386-pc-gnu)'s libc to omit this

Jeff Bailey

When you get to the heart,
use a knife and fork.
 - From instructions on how to eat an artichoke.

- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to More majordomo info at Please read the FAQ at

This archive was generated by hypermail 2b29 : Sun Dec 15 2002 - 22:00:29 EST