Fix bug #8229 - git patch attached against 3.6.0-rc2 to fix 'widelinks' regression intro'd in 3.2

Add "allow insecure widelinks" to re-enable the ability (requested
by some sites) to have "widelinks = yes" and "unix extensions = yes".

Based on an original patch by Linda Walsh <samba@tlinx.org>

Autobuild-User: Jeremy Allison <jra@samba.org>
Autobuild-Date: Wed Sep 14 03:55:45 CEST 2011 on sn-devel-104

3 files changed, 45 insertions, 0 deletions

diff --git a/docs-xml/smbdotconf/misc/allowinsecurewidelinks.xml b/docs-xml/smbdotconf/misc/allowinsecurewidelinks.xml
new file mode 100644
index 0000000000..a8a099190b
--- /dev/null
+++ b/docs-xml/smbdotconf/misc/allowinsecurewidelinks.xml
@@ -0,0 +1,37 @@
+<samba:parameter name="allow insecure wide links"
+		context="G"
+		type="boolean"
+		xmlns:samba="http://www.samba.org/samba/DTD/samba-doc">
+<description>
+	<para>
+	In normal operation the option <smbconfoption name="wide links"/>
+	which allows the server to follow symlinks outside of a share path
+	is automatically disabled when <smbconfoption name="unix extensions"/>
+	are enabled on a Samba server. This is done for security purposes
+	to prevent UNIX clients creating symlinks to areas of the server
+	file system that the administrator does not wish to export.
+	</para>
+	<para>
+	Setting <smbconfoption name="allow insecure wide links"/> to
+	true disables the link between these two parameters, removing
+	this protection and allowing a site to configure
+	the server to follow symlinks (by setting <smbconfoption name="wide links"/>
+	to "true") even when <smbconfoption name="unix extensions"/>
+	is turned on.
+	</para>
+	<para>
+	If is not recommended to enable this option unless you
+	fully understand the implications of allowing the server to
+	follow symbolic links created by UNIX clients. For most
+	normal Samba configurations this would be considered a security
+	hole and setting this parameter is not recommended.
+	</para>
+	<para>
+	This option was added at the request of sites who had
+	deliberately set Samba up in this way and needed to continue
+	supporting this functionality without having to patch the
+	Samba code.
+	</para>
+</description>
+<value type="default">no</value>
+</samba:parameter>
diff --git a/docs-xml/smbdotconf/misc/widelinks.xml b/docs-xml/smbdotconf/misc/widelinks.xml
index 1c30bb768a..da1374afab 100644
--- a/docs-xml/smbdotconf/misc/widelinks.xml
+++ b/docs-xml/smbdotconf/misc/widelinks.xml
@@ -17,6 +17,10 @@
 	disabled (with a message in the log file) if the
 	<smbconfoption name="unix extensions"/> option is on.
 	</para>
+	<para>
+	See the parameter <smbconfoption name="allow insecure wide links"/>
+	if you wish to change this coupling between the two parameters.
+	</para>
 </description>
 
 <value type="default">no</value>
diff --git a/docs-xml/smbdotconf/protocol/unixextensions.xml b/docs-xml/smbdotconf/protocol/unixextensions.xml
index d816648836..61a39cb763 100644
--- a/docs-xml/smbdotconf/protocol/unixextensions.xml
+++ b/docs-xml/smbdotconf/protocol/unixextensions.xml
@@ -14,6 +14,10 @@
     Note if this parameter is turned on, the <smbconfoption name="wide links"/>
     parameter will automatically be disabled.
     </para>
+    <para>
+    See the parameter <smbconfoption name="allow insecure wide links"/>
+    if you wish to change this coupling between the two parameters.
+    </para>
 </description>
 
 <value type="default">yes</value>