saving uncommitted changes in /etc prior to emerge run

conf.d/udev

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+# /etc/conf.d/udev: config file for udev
+
+# udev can trigger coldplug events which cause services to start and
+# kernel modules to be loaded.
+# Services are deferred to start in the boot runlevel.
+# Set rc_coldplug="NO" if you don't want this.
+# If you want module coldplugging but not coldplugging of services then you
+# can disable service coldplugging in baselayout/openrc config files.
+# The setting is named different in different versions.
+# in /etc/rc.conf: rc_hotplug="!*" or
+# in /etc/conf.d/rc: rc_plug_services="!*"
+#rc_coldplug="YES"
+
+# We can create a /dev/root symbolic link to point to the root device in
+# some situations. This is on by default because some software relies on
+# it,. However, this software should be fixed to not do this.
+# For more information, see
+# https://bugs.gentoo.org/show_bug.cgi?id=438380.
+# If you are not using any affected software, you do not need this, so
+# feel free to turn it off.
+#rc_dev_root_symlink="YES"
+
+# Expert options:
+
+# Timeout in seconds to wait for processing of uevents at boot.
+# There should be no need to change this.
+#udev_settle_timeout="60"
+
+# Add extra command line options to udevd, use with care
+# udevd --help for possible values
+#udev_opts=""
+
+# Run udevd --debug and write output to /run/udevdebug.log
+# Should not be kept on as it fills diskspace slowly
+#udev_debug="YES"
+
+# Run udevadmin monitor to get a log of all events
+# in /run/udevmonitor.log
+#udev_monitor="YES"
+
+# Keep udevmonitor running after populating /dev.
+#udev_monitor_keep_running="no"
+
+# Set cmdline options for udevmonitor.
+# could be some of --env --kernel --udev
+#udev_monitor_opts="--env"
+