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By default, under 5.X, uscanner0 permissions are 0640 preventing users
in operator group to use the scanner (a write access is required).  So
let's show how to change the permissions to 660 (for example) via
devfs.rules and the devfs_system_ruleset option in rc.conf.
This gives an example on how to change permissions on a node that is not
always present at system boot.
This commit is contained in:
Marc Fonvieille 2004-10-25 16:37:32 +00:00
parent 48e3526337
commit 3bae3606f6
Notes: svn2git 2020-12-08 03:00:23 +00:00 
svn path=/head/; revision=22681
1 changed files with 21 additions and 1 deletions
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22
en_US.ISO8859-1/books/handbook/multimedia/chapter.sgml
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@ -1815,7 +1815,27 @@ device `epson:/dev/uscanner0' is a Epson GT-8200 flatbed scanner</screen>
<screen>&prompt.root; <userinput>pw groupmod operator -m <replaceable>joe</replaceable></userinput></screen>
<para>For more details read the &man.pw.8; manual page.</para>
<para>For more details read the &man.pw.8; manual page. You
also have to set the correct write permissions (0660 or 0664)
on the <filename>/dev/uscanner0</filename> device node, by
default the <groupname>operator</groupname> group can only
read the device node. This is done by adding the following
lines to the <filename>/etc/devfs.rules</filename> file:</para>
<programlisting>[system=5]
add path uscanner0 mode 660</programlisting>
<para>Then add the following to
<filename>/etc/rc.conf</filename> and reboot the
machine:</para>
<programlisting>devfs_system_ruleset="system"</programlisting>
<para>More information regarding these lines can be found in the
&man.devfs.8; manual page. Under &os;&nbsp;4.X, the
<groupname>operator</groupname> group has, by default, read
and write permissions to
<filename>/dev/uscanner0</filename>.</para>
<note>
<para>Of course, for security reasons, you should think twice