X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=udev.8;h=eb772c9dbebd205cbe63b74fce5e0fc9a375ffa9;hb=e15b5ed5ded18af1329b304fc650a1cbc8123ccc;hp=f2006c42dc60aef84065b69cab2ed65506660a5e;hpb=170ae44e7d45e5907668cd1eab740a84eb79c70a;p=elogind.git

diff --git a/udev.8 b/udev.8
index f2006c42d..eb772c9db 100644
--- a/udev.8
+++ b/udev.8
@@ -78,7 +78,7 @@ udev_rules="/etc/udev/udev.rules"
 # udev_permissions - The name and location of the udev permission file
 udev_permissions="/etc/udev/udev.permissions"
 
-# default_mode - set the default mode for all nodes that have no 
+# default_mode - set the default mode for all nodes that have no
 #                explicit match in the permissions file
 default_mode="0666"
 .fi
@@ -106,14 +106,20 @@ The line format is:
 where valid methods with corresponding keys are:
 .TP
 .B CALLOUT
-calling external program, that returns a string to match
+calling external program, that returns a string to match.  The
+.B BUS
+key is optional, but if specified, the sysfs device bus must be able to be
+determined by a "device" symlink.
 .br
 .RB "keys: " BUS ", " PROGRAM ", " ID
 .TP
 .B LABEL
 device label or serial number, like USB serial number, SCSI UUID or
 file system label.  Up to 5 different sysfs files can be checked, with
-all of the values being required in order to match the rule.
+all of the values being required in order to match the rule.  The
+.B BUS
+key is optional, but if specified, the sysfs device bus must be able to be
+detemined by a "device" symlink.
 .br
 .RB "keys: " BUS ", " SYSFS_
 .TP