From ffdc02f45bcc973249406b2c9bd996f8b27fa2a5 Mon Sep 17 00:00:00 2001
From: David Herrmann <dh.herrmann@gmail.com>
Date: Thu, 11 Sep 2014 13:25:21 +0200
Subject: udev: allow removing tags via TAG-="foobar"

This extends the udev parser to support OP_REMOVE (-=) and adds support
for TAG-= to remove previously set tags. We don't fail if the tag didn't
exist.

This is pretty handy if we ship default rules for seat-assignments and
users want to exclude specific devices from that. They can easily add
rules that drop any automatically added "seat" tags again.

Signed-off-by: Anthony G. Basile <blueness@gentoo.org>
---
 man/udev.xml | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'man/udev.xml')

diff --git a/man/udev.xml b/man/udev.xml
index d4a5bedfdd..0ecf683a28 100644
--- a/man/udev.xml
+++ b/man/udev.xml
@@ -115,6 +115,13 @@
           </listitem>
         </varlistentry>
 
+        <varlistentry>
+          <term><literal>-=</literal></term>
+          <listitem>
+            <para>Remove the value from a key that holds a list of entries.</para>
+          </listitem>
+        </varlistentry>
+
         <varlistentry>
           <term><literal>:=</literal></term>
           <listitem>
-- 
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