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* [PATCH] udev - small script optimization
@ 2004-01-13  3:50 Kay Sievers
  2004-01-13 18:42 ` Greg KH
  2004-01-13 19:27 ` Martin Hicks
  0 siblings, 2 replies; 3+ messages in thread
From: Kay Sievers @ 2004-01-13  3:50 UTC (permalink / raw)
  To: linux-hotplug

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Optimize the scripts reflecting the now more powerful rule logic,
cause we can combine all known fields now in any order:

  The ide-devfs.sh is only executed if the kernel name matches with 'hd*':

    BUS="ide", KERNEL="hd*", PROGRAM="/etc/udev/ide-devfs.sh %k %b %n", NAME="%k", SYMLINK="%1c %2c"

  The name_cdrom.pl is only executed for ide and scsi devices, but not for a partition.
  It exits with nonzero to skip the rule if the CD is not found:

    KERNEL="[hs]d[a-z]", PROGRAM="name_cdrom.pl %M %m", NAME="%1c", SYMLINK="cdrom"


I'm happy for today, this was my last patch. :)

Kay

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diff -Nru a/extras/ide-devfs.sh b/extras/ide-devfs.sh
--- a/extras/ide-devfs.sh	Tue Jan 13 04:38:46 2004
+++ b/extras/ide-devfs.sh	Tue Jan 13 04:38:46 2004
@@ -2,7 +2,7 @@
 
 # udev external PROGRAM script
 # return devfs-names for ide-devices
-# BUS="ide", PROGRAM="/etc/udev/ide-devfs.sh %k %b %n", RESULT="hd*", NAME="%1c", SYMLINK="%2c %3c"
+# BUS="ide", KERNEL="hd*", PROGRAM="/etc/udev/ide-devfs.sh %k %b %n", NAME="%k", SYMLINK="%1c %2c"
 
 HOST="${2%\.[0-9]}"
 TARGET="${2#[0-9]\.}"
@@ -38,10 +38,10 @@
 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 cdroms/cdrom`get_dev_number $1 cdrom`
+		echo ide/host${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 discs/disc`get_dev_number $1 disk`/disc
+		echo ide/host${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 discs/disc`get_dev_number $1 disk`/part$3
+	echo ide/host${HOST}/bus${BUS}/target${TARGET}/lun0/part$3 discs/disc`get_dev_number $1 disk`/part$3
 fi
diff -Nru a/extras/name_cdrom.pl b/extras/name_cdrom.pl
--- a/extras/name_cdrom.pl	Tue Jan 13 04:38:46 2004
+++ b/extras/name_cdrom.pl	Tue Jan 13 04:38:46 2004
@@ -2,19 +2,17 @@
 
 # a horribly funny script that shows how flexible udev can really be
 # This is to be executed by udev with the following rules:
-# BUS="ide", PROGRAM="name_cdrom.pl %M %m", PROGRAM="good*", NAME="%2c", SYMLINK="cdrom"
-# BUS="scsi", PROGRAM="name_cdrom.pl %M %m", PROGRAM="good*", NAME="%2c", SYMLINK="cdrom"
-#
-# The scsi rule catches USB cdroms and ide-scsi devices.
-#
+# KERNEL="[hs]d[a-z]", PROGRAM="name_cdrom.pl %M %m", NAME="%1c", SYMLINK="cdrom"
 
-use CDDB_get qw( get_cddb );
+use strict;
+use warnings;
 
-my %config;
+use CDDB_get qw( get_cddb );
 
-$dev_node = "/tmp/cd_foo";
+my $dev_node = "/tmp/cd_foo";
 
 # following variables just need to be declared if different from defaults
+my %config;
 $config{CDDB_HOST}="freedb.freedb.org";		# set cddb host
 $config{CDDB_PORT}=8880;			# set cddb port
 $config{CDDB_MODE}="cddb";			# set cddb mode: cddb or http
@@ -23,8 +21,8 @@
 # No user interaction, this is a automated script!
 $config{input}=0;
 
-$major = $ARGV[0];
-$minor = $ARGV[1];
+my $major = $ARGV[0];
+my $minor = $ARGV[1];
 
 # create our temp device node to read the cd info from
 unlink($dev_node);
@@ -38,11 +36,11 @@
 # remove the dev node we just created
 unlink($dev_node);
 
-# print out our cd name if we have found it
-unless(defined $cd{title}) {
-	print"bad unknown cdrom\n";
-} else {
+# print out our cd name if we have found it or skip rule by nonzero exit
+if (defined $cd{title}) {
 	$cd{artist} =~ s/ /_/g;
 	$cd{title} =~ s/ /_/g;
-	print "good $cd{artist}-$cd{title}\n";
+	print "$cd{artist}-$cd{title}\n";
+} else {
+	exit -1;
 }

^ permalink raw reply	[flat|nested] 3+ messages in thread
end of thread, other threads:[~2004-01-13 19:27 UTC | newest]

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2004-01-13  3:50 [PATCH] udev - small script optimization Kay Sievers
2004-01-13 18:42 ` Greg KH
2004-01-13 19:27 ` Martin Hicks

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