Re: Possible udev bug and some questions

[Kay Sievers <kay.sievers@vrfy.org>]

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On Fri, Dec 26, 2003 at 12:01:41AM +0200, Martin Schlemmer wrote:

> '../ide/host0/bus0/target0/lun0/*' should be the real devices with
> /dev/hd* and /dev/{cdroms,discs}/* the symlinks to 'ide/....'.  I just
> cannot see how to do it easy with udev currently - correct me if I am
> wrong.

You're right, sorry for the confusion.

> Here is once again a replacement on that previous

Please have a look at this patch against clean v011.
It seems to work now :)

thanks,
Kay


/udev/
|-- cdroms
|   `-- cdrom0 -> ../hdc
|-- discs
|   |-- disc0
|   |   |-- disc -> ../../hda
|   |   |-- part1 -> ../../hda1
|   |   |-- part2 -> ../../hda2
|   |   `-- part4 -> ../../hda4
|   |-- disc1
|   |   |-- disc -> ../../hdb
|   |   `-- part1 -> ../../hdb1
|   `-- disc2
|       |-- disc -> ../../hde
|       `-- part1 -> ../../hde1
|-- hda
|-- hda1
|-- hda2
|-- hda4
|-- hdb
|-- hdb1
|-- hdc
|-- hde
|-- hde1
`-- ide
    |-- host0
    |   |-- bus0
    |   |   |-- target0
    |   |   |   `-- lun0
    |   |   |       |-- disc -> ../../../../../hda
    |   |   |       |-- part1 -> ../../../../../hda1
    |   |   |       |-- part2 -> ../../../../../hda2
    |   |   |       `-- part4 -> ../../../../../hda4
    |   |   `-- target1
    |   |       `-- lun0
    |   |           |-- disc -> ../../../../../hdb
    |   |           `-- part1 -> ../../../../../hdb1
    |   `-- bus1
    |       `-- target0
    |           `-- lun0
    |               `-- cd -> ../../../../../hdc
    `-- host2
        `-- bus0
            `-- target0
                `-- lun0
                    |-- disc -> ../../../../../hde
                    `-- part1 -> ../../../../../hde1


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diff -Nru a/extras/ide-devfs.sh b/extras/ide-devfs.sh
--- a/extras/ide-devfs.sh	Thu Dec 25 23:53:20 2003
+++ b/extras/ide-devfs.sh	Thu Dec 25 23:53:20 2003
@@ -2,7 +2,7 @@
 
 # udev CALLOUT script
 # return devfs-names for ide-devices
-# CALLOUT, BUS="ide", PROGRAM="/etc/udev/ide-devfs.sh %k %b %n", ID="hd*", NAME="%1c", SYMLINK="%2c"
+# CALLOUT, BUS="ide", PROGRAM="/etc/udev/ide-devfs.sh %k %b %n", ID="hd*", NAME="%1c", SYMLINK="%2c %3c"
 
 HOST=${2%\.[0-9]}
 TARGET=${2#[0-9]\.}
@@ -14,14 +14,34 @@
 	BUS="0"
 fi
 
+get_dev_number() {
+	local x=
+	local num=0
+	local MEDIA=
+	local DRIVE=${1%[0-9]*}
+
+	for x in /proc/ide/*/media; do
+		if [ -e "$x" ]; then
+			MEDIA=`cat $x`
+			if [ "$MEDIA" = "$2" ]; then
+				num=`expr $num + 1`
+			fi
+			if [ "$x" = "/proc/ide/$DRIVE/media" ]; then
+				break
+			fi
+		fi
+	done
+	
+	echo `expr $num - 1`
+}
+
 if [ -z "$3" ]; then
 	MEDIA=`cat /proc/ide/$1/media`
 	if [ "$MEDIA" = "cdrom" ]; then
-		echo $1 ide/host$HOST/bus$BUS/target$TARGET/lun0/cd
+		echo $1 ide/host$HOST/bus$BUS/target$TARGET/lun0/cd cdroms/cdrom`get_dev_number $1 cdrom`
 	elif [ "$MEDIA" = "disk" ]; then
-		echo $1 ide/host$HOST/bus$BUS/target$TARGET/lun0/disc
+		echo $1 ide/host$HOST/bus$BUS/target$TARGET/lun0/disc discs/disc`get_dev_number $1 disk`/disc
 	fi
 else
-	echo $1 ide/host$HOST/bus$BUS/target$TARGET/lun0/part$3
+	echo $1 ide/host$HOST/bus$BUS/target$TARGET/lun0/part$3 discs/disc`get_dev_number $1 disk`/part$3
 fi
-