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* ntsec.sgml: Add note on special names for missing user/group.

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Corinna Vinschen 2003-02-07 20:59:19 +00:00
parent 4136fdb16b
commit 4a41db9e74
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@ -1,3 +1,7 @@
2003-02-07 Igor Pechtchanski <pechtcha@cs.nyu.edu>
* ntsec.sgml: Add note on special names for missing user/group.
2002-12-18 Christopher Faylor <cgf@redhat.com>
* overview2.sgml: Remove CTRL-Z discussion.

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winsup/doc/ntsec.sgml
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@ -731,4 +731,67 @@ able to access it when trying to login using ssh or rsh without password.
</sect2>
<sect2 id="ntsec-release1.3.20"><title>Special values of user and group
ids</title>
<para>
If the current user is not present in <filename>/etc/passwd</filename>,
that user's user id is set to a special value of 400. The user name for
the current user will always be shown correctly. If another user
(or a Windows group, treated as a user) is not present in
<filename>/etc/passwd</filename>, the user id of that user will have a
special value of -1 (which would be shown by <command>ls</command> as
65535). The user name shown in this case will be '????????'.
</para>
<para>
If the current user is not present in <filename>/etc/passwd</filename>,
that user's login group id is set to a special value of 401. If another
user is not present in <filename>/etc/passwd</filename>, that user's login
group id is set to a special value of -1. If the user is present in
<filename>/etc/passwd</filename>, but that user's group is not in
<filename>/etc/group</filename> and is not the login group of that user,
the group id is set to a special value of -1. The name of this group
(id -1) will be shown as '????????'.
In releases of Cygwin before 1.3.20, the group id 401 had a group name
'None'. Since Cygwin release 1.3.20, the group id 401 is shown as
'mkpasswd', indicating the command that should be run to alleviate the
situation.
</para>
<para>
Also, since Cygwin release 1.3.20, if the current user is present in
<filename>/etc/passwd</filename>, but that user's login group is not
present in <filename>/etc/group</filename>, the group name will be shown
as 'mkgroup', again indicating the appropriate command.
</para>
<para>To summarize:</para>
<itemizedlist spacing="compact">
<listitem><para>If the current user doesn't show up in
<filename>/etc/passwd</filename>, it's <emphasis>group</emphasis> will
be named 'mkpasswd'.</para></listitem>
<listitem><para>Otherwise, if the login group of the current user isn't
in <filename>/etc/group</filename>, it will be named 'mkgroup'.</para>
</listitem>
<listitem><para>Otherwise a group not in <filename>/etc/group</filename>
will be shown as '????????' and a user not in
<filename>/etc/passwd</filename> will be shown as "????????".</para>
</listitem>
</itemizedlist>
<para>
Note that, since the special user and group names are just indicators,
nothing prevents you from actually having a user named `mkpasswd' in
<filename>/etc/passwd</filename> (or a group named `mkgroup' in
<filename>/etc/group</filename>). If you do that, however, be aware of
the possible confusion.
</para>
</sect2>
</sect1>