Problems with long usernames

Alexander E. Patrakov semzx at
Fri Apr 11 19:28:40 PDT 2003

On Friday 11 April 2003 20:40, Archaic wrote:
> [tty2 root 09:33am ~] useradd -m supercalfragilisticexpealadocious
> useradd: invalid user name 'supercalfragilisticexpealadocious'
> [tty2 root 09:34am ~] useradd -m supercalfragilisticexpealadociou
>                                  123456879012345678901234568790123
> [tty2 root 09:35am ~] ls -la /home/supercalfragilisticexpealadociou/
> total 8.0k
> drwxr-xr-x    2 supercal localusr     4.0k Apr 11 09:34 .
> drwxr-xr-x    4 root     root         4.0k Apr 11 09:34 ..
> The only deviation from the book is adding MD5 support,
which has nothing to do with utmp/utmpx.

Thanks, now I see that your shadow is configured correctly. Accurding to the 
source, useradd refuses to create a user if his name won't fit in the 
corresponding field in the utmpx (not utmp) structure (32 bytes).

Another question. RedHat's 'top' command prints numeric IDs for usernames 
longer than 8 characters instead of truncating them as our 'top' does. Is 
that achieved with some package's configuration option or a patch?

Alexander E. Patrakov

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