create a document for mdev so people dont have to rtfs

1 files changed, 10 insertions, 26 deletions

diff --git a/util-linux/Config.in b/util-linux/Config.in
index 1f144cae5..2184df153 100644
--- a/util-linux/Config.in
+++ b/util-linux/Config.in
@@ -269,46 +269,30 @@ config MDEV
         bool "mdev"
         default n
         help
-          mdev is a mini-udev implementation: call it with -s to populate
-          /dev from /sys, then "echo /sbin/mdev > /proc/sys/kernel/hotplug" to
-          have it handle hotplug events afterwards.  Device names are taken
-          from sysfs.
+          mdev is a mini-udev implementation for dynamically creating device
+          nodes in the /dev directory.
+
+          For more information, please see docs/mdev.txt
 
 config FEATURE_MDEV_CONF
         bool "Support /etc/mdev.conf"
         default n
         depends on MDEV
         help
-          The mdev config file contains lines that look like:
-
-            hd[a-z][0-9]* 0:3 660
-
-          That's device name (with regex match), uid:gid, and permissions.
+          Add support for the mdev config file to control ownership and
+          permissions of the device nodes.
 
-          Config file parsing stops on the first matching line.  If no config
-          entry is matched, devices are created with default 0:0 660.  (Make
-          the last line match .* to override this.)
+          For more information, please see docs/mdev.txt
 
 config FEATURE_MDEV_EXEC
         bool "Support command execution at device addition/removal"
         default n
         depends on FEATURE_MDEV_CONF
         help
-          This adds support for an optional field to /etc/mdev.conf, consisting
-          of a special character and a command line to run after creating the
-          corresponding device(s) and before removing, ala:
-
-            hdc root:cdrom 660  *ln -s $MDEV cdrom
-
-          The $MDEV environment variable is set to the name of the device.
-
-          The special characters and their meanings are:
-            @ Run after creating the device.
-            $ Run before removing the device.
-            * Run both after creating and before removing the device.
+          This adds support for an optional field to /etc/mdev.conf for
+          executing commands when devices are created/removed.
 
-          Commands are executed via system() so you need /bin/sh, meaning you
-          probably want to select a default shell in the Shells menu.
+          For more information, please see docs/mdev.txt
 
 config MKSWAP
         bool "mkswap"