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authorgreg@kroah.com <greg@kroah.com>2004-10-15 19:19:53 -0700
committerGreg KH <gregkh@suse.de>2005-04-26 22:02:45 -0700
commit79db6912cf8827bf4293d2d15b84cc9633dd7d4e (patch)
treeb3227d61af289164a750ff958d01a8db7721ce7e /extras/cdsymlinks.sh
parent29afcc5f111f780869a7b091600b106136e11b6d (diff)
[PATCH] add very nice cdsymlinks scripts.
These are from Darren Salt <linux@youmustbejoking.demon.co.uk>
Diffstat (limited to 'extras/cdsymlinks.sh')
-rw-r--r--extras/cdsymlinks.sh184
1 files changed, 184 insertions, 0 deletions
diff --git a/extras/cdsymlinks.sh b/extras/cdsymlinks.sh
new file mode 100644
index 0000000000..e99be2e544
--- /dev/null
+++ b/extras/cdsymlinks.sh
@@ -0,0 +1,184 @@
+#! /bin/sh -e
+#
+# Map cdrom, cdm, cdmrw, cd-r, cdrw, dvd, dvdrw, dvdram to suitable devices.
+# Prefers cd* for DVD-incapable and cdrom and dvd for read-only devices.
+# First parameter is the kernel device name.
+# Second parameter, if present, must be "-d" => output the full mapping.
+#
+# Usage:
+# BUS="ide", KERNEL="hd[a-z]", PROGRAM="/etc/udev/cdsymlinks.sh %k", SYMLINK="%c{1} %c{2} %c{3} %c{4} %c{5} %c{6}"
+# BUS="scsi", KERNEL="sr[0-9]*", PROGRAM="/etc/udev/cdsymlinks.sh %k", SYMLINK="%c{1} %c{2} %c{3} %c{4} %c{5} %c{6}"
+# BUS="scsi", KERNEL="scd[0-9]*", PROGRAM="/etc/udev/cdsymlinks.sh %k", SYMLINK="%c{1} %c{2} %c{3} %c{4} %c{5} %c{6}"
+# (this last one is "just in case")
+#
+# (c) 2004 Darren Salt <linux@youmustbejoking.demon.co.uk>
+
+test -e /proc/sys/dev/cdrom/info || exit 0
+
+# Defaults; it's better that you alter them in /etc/udev/cdsymlinks.conf
+OUTPUT='CD CDRW DVD DVDRW DVDRAM'
+NUMBERED_LINKS=1
+
+test -e /etc/udev/cdsymlinks.conf && . /etc/udev/cdsymlinks.conf
+
+DEBUG=''
+test "$2" = '-d' && DEBUG=1
+
+
+# Array emulation. 'setArray FOO a b c' gives FOO=3 FOO_1=a FOO_2=b FOO_3=c
+setArray () {
+ local _ARRAY=$1
+ local _INDEX=0
+ shift
+ while test $# -ne 0; do
+ eval ${_ARRAY}_$_INDEX="$1"
+ _INDEX=$(($_INDEX+1))
+ shift
+ done
+ eval $_ARRAY=$_INDEX
+}
+
+ix () { eval echo -n \$$1_$2; }
+ixs () { eval $1_$2="$3"; }
+
+# Args: variable, value
+# Returns true if value is not in variable (a whitespace-separated list)
+notin () {
+ test "$2" = '' && return 0
+ local i
+ for i in `eval echo '$'$1`; do
+ test "$i" != "$2" || return 1
+ done
+}
+
+
+# Scan /proc/sys/dev/cdrom/info for details on the present devices
+setArray DEVICES `sed -re '/^drive name:/I! d; s/.*://' /proc/sys/dev/cdrom/info`
+setArray DVDRAMs `sed -re '/^Can write DVD-RAM:/I! d; s/.*://' /proc/sys/dev/cdrom/info`
+setArray DVDRWs `sed -re '/^Can write DVD-R:/I! d; s/.*://' /proc/sys/dev/cdrom/info`
+setArray DVDs `sed -re '/^Can read DVD:/I! d; s/.*://' /proc/sys/dev/cdrom/info`
+setArray CDRWs `sed -re '/^Can write CD-RW:/I! d; s/.*://' /proc/sys/dev/cdrom/info`
+setArray CDRs `sed -re '/^Can write CD-R:/I! d; s/.*://' /proc/sys/dev/cdrom/info`
+setArray CDMRWs `sed -re '/^Can write MRW:/I! d; s/.*://' /proc/sys/dev/cdrom/info`
+setArray CDMs `sed -re '/^Can read MRW:/I! d; s/.*://' /proc/sys/dev/cdrom/info`
+
+# How many devices do we have?
+NumDevs=$(($DEVICES-1))
+Count=''
+i=-1
+while test $i -ne $NumDevs; do
+ i=$(($i+1));
+ Count="$i${Count:+ }$Count";
+done
+
+# Fill in any missing capabilities information (assume not capable)
+for i in $Count; do
+ test "`ix DVDRAMs $i`" != '' || ixs DVDRAMs $i 0
+ test "`ix DVDRWs $i`" != '' || ixs DVDRWs $i 0
+ test "`ix DVDs $i`" != '' || ixs DVDs $i 0
+ test "`ix CDRWs $i`" != '' || ixs CDRWs $i 0
+ test "`ix CDRs $i`" != '' || ixs CDRs $i 0
+ test "`ix CDMRWs $i`" != '' || ixs CDMRWs $i 0
+ test "`ix CDMs $i`" != '' || ixs CDMs $i 0
+done
+
+DVDRAM=''
+DVDRW=''
+DVD=''
+CDRW=''
+CDR=''
+CDMRW=''
+CDM=''
+CD=''
+
+# Calculate symlink->device mappings.
+# We need to be careful about how we assign mappings because we want
+# read-only devices to have /dev/cdrom and /dev/dvd.
+# Hot-plugged CD/DVD devices may well cause this scheme some problems.
+for i in $Count; do
+ test "`ix DVDRAMs $i`" = 1 && DVDRAM="$DVDRAM `ix DEVICES $i`"
+done
+for i in $Count; do
+ test "`ix DVDRWs $i`" = 1 && DVDRW="$DVDRW `ix DEVICES $i`"
+done
+for i in $Count; do
+ test "`ix DVDs $i`" = 1 && DVD="$DVD `ix DEVICES $i`"
+done
+for i in $Count; do
+ test "`ix CDRWs $i`" = 1 && CDRW="$CDRW `ix DEVICES $i`"
+done
+for i in $Count; do
+ test "`ix CDRs $i`" = 1 && CDR="$CDR `ix DEVICES $i`"
+done
+for i in $Count; do
+ test "`ix CDMRWs $i`" = 1 && CDMRW="$CDMRW `ix DEVICES $i`"
+done
+for i in $Count; do
+ test "`ix CDMs $i`" = 1 && CDM="$CDM `ix DEVICES $i`"
+done
+for i in $Count; do
+ CD="$CD `ix DEVICES $i`"
+done
+
+# Debug output
+if test "$DEBUG" = 1; then
+ echo 'Devices:' `for i in $Count; do ix DEVICES $i; echo -n \ ; done`
+ echo 'DVDRAM :' `for i in $Count; do ix DVDRAMs $i; echo -n \ ; done` $DVDRAM
+ echo 'DVDRW :' `for i in $Count; do ix DVDRWs $i; echo -n \ ; done` $DVDRW
+ echo 'DVD :' `for i in $Count; do ix DVDs $i; echo -n \ ; done` $DVD
+ echo 'CDRW :' `for i in $Count; do ix CDRWs $i; echo -n \ ; done` $CDRW
+ echo 'CD-R :' `for i in $Count; do ix CDRs $i; echo -n \ ; done` $CDR
+ echo 'CDMRW :' `for i in $Count; do ix CDMRWs $i; echo -n \ ; done` $CDMRW
+ echo 'CDM :' `for i in $Count; do ix CDMs $i; echo -n \ ; done` $CDM
+ echo 'CDROM : (all)' $CD
+fi
+
+# Prepare symlink names output
+output () {
+ test "`eval echo '$'$3`" = '' && return
+ local i
+ local COUNT=''
+ local DEVLS="`ls -dl \"/dev/$2\" \"/dev/$2\"[0-9]* 2>/dev/null`"
+ local PRESENT="`echo "$DEVLS" |
+ sed -re 's!^.* /dev/('$2'[[:digit:]]*) -> [^[:space:]]+$!\1!'`"
+ for i in `eval echo '$'$3`; do
+ # First, we look for existing symlinks to the target device.
+ local DEVPRESENT="`echo "$DEVLS" |
+ sed -re 's!^.* /dev/('$2'[[:digit:]]*) -> '$i'$!\1!; t X; d; :X'`"
+ if test "$DEVPRESENT" != ""; then
+ # Existing symlinks found - don't output a new one.
+ # If the target dev ($1) is the current dev ($i), we output their names.
+ test "$1" = "$i" && echo " $DEVPRESENT" | sed -e 'N; $ s/\n/ /'
+ else
+ # If we found no existing symlinks for the target device...
+ # Find the next available (not present) symlink name.
+ # We always need to do this for reasons of output consistency: if a
+ # symlink is created by udev as a result of use of this program, we
+ # DON'T want different output!
+ until notin PRESENT "$2$COUNT"; do
+ COUNT=$(($COUNT+1))
+ done
+ # If the target dev ($1) is the current dev ($i), we output its name.
+ if test $(($NUMBERED_LINKS)) -ne 0 || test "$COUNT" -eq 0; then
+ test "$i" = "$1" && echo -n " $2$COUNT"
+ fi
+ # If the link isn't in our "existing links" list, add it and increment
+ # our counter.
+ if test ! -e "/dev/$2$COUNT"; then
+ PRESENT="$PRESENT\n$2$COUNT"
+ COUNT=$(($COUNT+1))
+ fi
+ fi
+ done
+}
+
+# And output it
+notin OUTPUT CD || echo -n "`output "$1" cdrom CD`"
+notin OUTPUT CDMRW || echo -n "`output "$1" cdmrw CDM`"
+notin OUTPUT CDWMRW || echo -n "`output "$1" cdwmrw CDMRW`"
+notin OUTPUT CDR || echo -n "`output "$1" cd-r CDR`"
+notin OUTPUT CDRW || echo -n "`output "$1" cdrw CDRW`"
+notin OUTPUT DVD || echo -n "`output "$1" dvd DVD`"
+notin OUTPUT DVDRW || echo -n "`output "$1" dvdrw DVDRW`"
+notin OUTPUT DVDRAM || echo -n "`output "$1" dvdram DVDRAM`"
+echo