Date: Sun, 29 Dec 1996 20:26:16 +0100 From: Wolfram Schneider <wosch@cs.tu-berlin.de> To: Masafumi NAKANE/=?ISO-2022-JP?B?GyRCQ2Y6LDJtSjgbKEI=?= <max@wide.ad.jp> Cc: current@freebsd.org Subject: usable characters for login names Message-ID: <199612291926.UAA03797@campa.panke.de> In-Reply-To: <199612291216.VAA04809@mail.tky007.tth.expo96.ad.jp> References: <199612291216.VAA04809@mail.tky007.tth.expo96.ad.jp>
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Masafumi NAKANE writes:
>Now, adduser rejects underscore and hyphen. Pw useradd accepts `_'
>but rejects `-'. Is there any explicit source code or documentation
>stating about legal characters for logins?
Illegal characters are characters which break password database
(':', '\0', '\n'), group database (comma, spaces), mail
addresses (many characters), or any other important program.
Only characters which are on any keyboard in the world should be used.
Wolfram
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