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[PATCH] udev - small script optimization 

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"
This commit is contained in:
kay.sievers@vrfy.org 2004-01-13 18:34:38 -08:00 committed by Greg KH
parent 8ffb636f01
commit 33084f1e2a
2 changed files with 17 additions and 19 deletions
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8
extras/ide-devfs.sh
View File

@ -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 @@ get_dev_number() {
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

28
extras/name_cdrom.pl
View File

@ -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 strict;
use warnings;
use CDDB_get qw( get_cddb );
my %config;
$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 @@ $config{CD_DEVICE}="$dev_node"; # set cd device
# 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 @@ my %cd=get_cddb(\%config);
# 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;
}