udev-extra-rules: refactor mount.sh script

Avoids a fork for using cat and do a whitespace cleanup.

Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>

meta-oe/recipes-core/udev/udev-extra-rules.bb

@@ -2,7 +2,7 @@ DESCRIPTION = "Extra udev rules"
 LICENSE = "MIT"
 LIC_FILES_CHKSUM = "file://${COREBASE}/LICENSE;md5=3f40d7994397109285ec7b81fdeb3b58"
 
-PR = "r1"
+PR = "r2"
 
 SRC_URI = " \
        file://automount.rules \

meta-oe/recipes-core/udev/udev-extra-rules/mount.sh

@@ -10,7 +10,7 @@ PMOUNT="/usr/bin/pmount"
 UMOUNT="/bin/umount"
 name="`basename "$DEVNAME"`"
 
-for line in `cat /etc/udev/mount.blacklist | grep -v ^#`
+for line in `grep -v ^# /etc/udev/mount.blacklist`
 do
 	if ( echo "$DEVNAME" | grep -q "$line" )
 	then
@@ -49,20 +49,12 @@ if [ "$ACTION" = "add" ] && [ -n "$DEVNAME" ]; then
 			$MOUNT $DEVNAME 2> /dev/null
 	fi
 
-	# If the device isn't mounted at this point, it isn't configured in fstab
-	# 20061107: Small correction: The rootfs partition may be called just "rootfs" and not by
-	# 	    its true device name so this would break. If the rootfs is mounted on two places
-	#	    during boot, it confuses the heck out of fsck. So Im auto-adding the root-partition
-	#	    to /etc/udev/mount.blacklist via postinst 
-
-	cat /proc/mounts | awk '{print $1}' | grep -q "^$DEVNAME$" || automount 
-	
+	# Avoid remounting devices (e.g: rootfs)
+	awk '{print $1}' /proc/mounts | grep -q "^$DEVNAME$" || automount
 fi
 
-
-
 if [ "$ACTION" = "remove" ] && [ -x "$UMOUNT" ] && [ -n "$DEVNAME" ]; then
-	for mnt in `cat /proc/mounts | grep "$DEVNAME" | cut -f 2 -d " " `
+	for mnt in `grep "$DEVNAME" /proc/mounts | cut -f 2 -d " " `
 	do
 		$UMOUNT -l $mnt
 	done