Date: Mon, 29 Oct 2012 09:31:50 +0100 (CET) From: =?ISO-8859-1?Q?Trond_Endrest=F8l?= <Trond.Endrestol@fagskolen.gjovik.no> To: jb <jb.1234abcd@gmail.com> Cc: freebsd-questions@freebsd.org Subject: Re: /etc/passwd and "&" char Message-ID: <alpine.BSF.2.00.1210290930320.26470@mail.fig.ol.no> In-Reply-To: <loom.20121029T091947-234@post.gmane.org> References: <loom.20121029T091947-234@post.gmane.org>
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On Mon, 29 Oct 2012 08:28-0000, jb wrote:
> Hi,
>
> Question:
> What is the purpose of the "&" char in GECOS fields, e.g. user's name field, in
> /etc/passwd file ?
>
> $ grep "&" /etc/passwd
> root:*:0:0:Charlie &:/root:/bin/csh
> operator:*:2:5:System &:/:/usr/sbin/nologin
> svn:*:1002:1002:User &:/home/svn:/usr/sbin/nologin
>From passwd(5):
The full name may contain a ampersand (`&') which will be replaced by the
capitalized login name when the gecos field is displayed or used by vari-
ous programs such as finger(1), sendmail(8), etc.
> The field containing "&" char represents "-c comment" option in pw(8), which
> sets up GECOS fields (user's full name, etc).
>
> The pw(8) states further:
> ...
> The pw utility allows 8-bit characters in the passwd GECOS field ...
> ...
> Using 8-bit characters may also affect other
> programs that transmit the contents of the GECOS field over the Internet,
> such as fingerd(8), and a small number of TCP/IP clients, such as IRC,
> where full names specified in the passwd file may be used by default.
> ...
>
> http://en.wikipedia.org/wiki/Ampersand
> ...
> Encoding and display
> ...
> Programming languages
> ...
> The ampersand character is used as a special character in at least some
> versions of the database software originally created in Denmark under the
> name Navision (the software has since been acquired by Microsoft). Using this
> character in either "Text" or "Code" fields could create difficulties for
> performing certain tasks in Navision, such as filtering records (either by
> the user or by programming). It is also used as described below to indicate
> shortcuts in menu items and lab els.
> ...
> Text markup
> In SGML, XML, and HTML, ... This creates what is known as the ampersand
> problem. ...
> ...
> Unix shells
> ...
> Web standards
> ...
>
> Google search results for "& character":
> Special (escape) characters in SGML, HTML and XML documents:
> & & & ampersand
>
> jb
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| IT-ansvarlig, | System administrator, |
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