From: Kay Sievers Date: Tue, 14 Jun 2005 11:28:24 +0000 (+0200) Subject: udev man page: add operators X-Git-Tag: 059~13^2~10 X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=commitdiff_plain;h=0fa98832b5be9893e1b26252c20b68d730b77173 udev man page: add operators Patch from: Hannes Reinecke Signed-off-by: Kay Sievers --- diff --git a/udev.8.in b/udev.8.in index e4c1c11af..b4edd5aeb 100644 --- a/udev.8.in +++ b/udev.8.in @@ -104,6 +104,36 @@ Every rule consists of a list of comma separated key value fields: .sp .IR "key " ,[ "key " ,...] .P +Each key has the following format: +.sp +.IR "name op value" +.P +There are distinct key operation types, depending on the type of the key, it +does a comparison or an assignment. +.P +Comparison operators are: +.TP +.B == +Compare for equality. +.TP +.B != +Compare for non-equality. +.P +Assignment operators are: +.TP +.B += +Add the value to a key that holds a list of entries. +.TP +.B := +Assign a value to a key finally; disallow any later changes, which +is useful to prevent changes by any later rules. +.TP +.B = +Asign a value to a key. Keys that represent a list, are reset and only this +single value is assigned. While this operator still works inplicitely as +comparison on keys that can't get a value assigned, its usage as an comparison +operator is deprecated. +.P The following key names can be used to match against device properties: .TP .B BUS