Nicolas Williams <[EMAIL PROTECTED]> wrote:

> On Fri, Sep 28, 2007 at 09:41:27PM +0100, Peter Tribble wrote:
> > On 9/26/07, Nicolas Williams <[EMAIL PROTECTED]> wrote:
> > >
> > > Why do you think we limit usernames to 8 characters still?  It's because
> > > of things like ps(1) and ls(1) that like to use fixed-width columns.
> > 
> > But they aren't limited to 8 characters. Usernames can be longer.
> Yes.  And no.
> There's a large variety of silly limits on username length, from 8
> _characters_ (or is it width? well, we don't really do I18N for
> usernames...) to 32 _bytes_.
> The 8 character limit is all about column formatting in tools like ps(1)
> and ls(1).  The 32 byte limit is from utmpx.

utmpx has no specific user name limit in POSIX.

Before POSIX.1-2001, there indeed was a hard limit but this limit was from TAR!

With the new extended tar headers from POSIX.1-2001, user names could be 
_really_ llong.


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