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Date:      Wed, 13 Apr 2022 01:04:05 +0000
From:      Rick Macklem <rmacklem@uoguelph.ca>
To:        freebsd-current <freebsd-current@freebsd.org>
Subject:   Sanity limit for length of user/group names?
Message-ID:  <YT2PR01MB97304F4066E62581CF01DC00DDEC9@YT2PR01MB9730.CANPRD01.PROD.OUTLOOK.COM>
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Hi,

The NFSv4 RFCs do not specify an upper limit for the length
of a user or group (called Owner/Owner_group in NFSv4) string.

However, PR#260546 notes that a sanity upper limit for their
length is needed.

Is there any constant in FreeBSD that defines the upper limit for
the length of a user or group name?
(I can find the maximum length of a hostname and I think that can
 be used as a safe upper limit for a domain name, as well. The Owner/
 Owner_group names include "@domain" on them.)

Thanks for any help with this, rick
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