Make rule generator switchable

[Matthias Schwarzott <zzam@gentoo.org>]

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Hi there!

I thought about making rule generator/persistent-net user switchable. As this 
was not possible yet, I implemented one possibility. This reads udev.conf 
from write_(cd|net)_rules and aborts if there is:
persistent_cd_generator="disabled"

Is there a better method to do this? If not, how about including this, and 
perhaps commented out part for config file.

#Disable generation of persistent-rules for cd devices
#persistent_cd_generator="disabled"

# Disable generation of persistent-rules for network devices
#persistent_net_generator="disabled"


Matthias
-- 
Matthias Schwarzott (zzam)

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diff --git a/extras/rule_generator/write_cd_rules b/extras/rule_generator/write_cd_rules
index bd951c5..21b48e9 100644
--- a/extras/rule_generator/write_cd_rules
+++ b/extras/rule_generator/write_cd_rules
@@ -14,6 +14,11 @@
 RULES_FILE="/etc/udev/rules.d/70-persistent-cd.rules"
 
 . /lib/udev/rule_generator.functions
+[ -r /etc/udev/udev.conf ] && . /etc/udev/udev.conf
+
+if [ "$persistent_cd_generator" = "disabled" ]; then
+	exit 1
+fi
 
 find_next_available() {
 	raw_find_next_available "$(find_all_rules 'SYMLINK+=' $1)"
diff --git a/extras/rule_generator/write_net_rules b/extras/rule_generator/write_net_rules
index b873b5b..37c0130 100644
--- a/extras/rule_generator/write_net_rules
+++ b/extras/rule_generator/write_net_rules
@@ -19,6 +19,11 @@
 RULES_FILE='/etc/udev/rules.d/70-persistent-net.rules'
 
 . /lib/udev/rule_generator.functions
+[ -r /etc/udev/udev.conf ] && . /etc/udev/udev.conf
+
+if [ "$persistent_net_generator" = "disabled" ]; then
+	exit 1
+fi
 
 interface_name_taken() {
 	local value="$(find_all_rules 'NAME=' $INTERFACE)"

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