3 # Map cdrom, cdm, cdmrw, cd-r, cdrw, dvd, dvdrw, dvdram to suitable devices.
4 # Prefers cd* for DVD-incapable and cdrom and dvd for read-only devices.
5 # First parameter is the kernel device name.
6 # Second parameter, if present, must be "-d" => output the full mapping.
9 # 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}"
10 # 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}"
11 # 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}"
12 # (this last one is "just in case")
14 # (c) 2004 Darren Salt <linux@youmustbejoking.demon.co.uk>
16 test -e /proc/sys/dev/cdrom/info || exit 0
18 # Defaults; it's better that you alter them in /etc/udev/cdsymlinks.conf
19 OUTPUT='CD CDRW DVD DVDRW DVDRAM'
22 test -e /etc/udev/cdsymlinks.conf && . /etc/udev/cdsymlinks.conf
25 test "$2" = '-d' && DEBUG=1
28 # Array emulation. 'setArray FOO a b c' gives FOO=3 FOO_1=a FOO_2=b FOO_3=c
33 while test $# -ne 0; do
34 eval ${_ARRAY}_$_INDEX="$1"
41 ix () { eval echo -n \$$1_$2; }
42 ixs () { eval $1_$2="$3"; }
44 # Args: variable, value
45 # Returns true if value is not in variable (a whitespace-separated list)
47 test "$2" = '' && return 0
49 for i in `eval echo '$'$1`; do
50 test "$i" != "$2" || return 1
55 # Scan /proc/sys/dev/cdrom/info for details on the present devices
56 setArray DEVICES `sed -re '/^drive name:/I! d; s/.*://' /proc/sys/dev/cdrom/info`
57 setArray DVDRAMs `sed -re '/^Can write DVD-RAM:/I! d; s/.*://' /proc/sys/dev/cdrom/info`
58 setArray DVDRWs `sed -re '/^Can write DVD-R:/I! d; s/.*://' /proc/sys/dev/cdrom/info`
59 setArray DVDs `sed -re '/^Can read DVD:/I! d; s/.*://' /proc/sys/dev/cdrom/info`
60 setArray CDRWs `sed -re '/^Can write CD-RW:/I! d; s/.*://' /proc/sys/dev/cdrom/info`
61 setArray CDRs `sed -re '/^Can write CD-R:/I! d; s/.*://' /proc/sys/dev/cdrom/info`
62 setArray CDMRWs `sed -re '/^Can write MRW:/I! d; s/.*://' /proc/sys/dev/cdrom/info`
63 setArray CDMs `sed -re '/^Can read MRW:/I! d; s/.*://' /proc/sys/dev/cdrom/info`
65 # How many devices do we have?
66 NumDevs=$(($DEVICES-1))
69 while test $i -ne $NumDevs; do
71 Count="$i${Count:+ }$Count";
74 # Fill in any missing capabilities information (assume not capable)
76 test "`ix DVDRAMs $i`" != '' || ixs DVDRAMs $i 0
77 test "`ix DVDRWs $i`" != '' || ixs DVDRWs $i 0
78 test "`ix DVDs $i`" != '' || ixs DVDs $i 0
79 test "`ix CDRWs $i`" != '' || ixs CDRWs $i 0
80 test "`ix CDRs $i`" != '' || ixs CDRs $i 0
81 test "`ix CDMRWs $i`" != '' || ixs CDMRWs $i 0
82 test "`ix CDMs $i`" != '' || ixs CDMs $i 0
94 # Calculate symlink->device mappings.
95 # We need to be careful about how we assign mappings because we want
96 # read-only devices to have /dev/cdrom and /dev/dvd.
97 # Hot-plugged CD/DVD devices may well cause this scheme some problems.
99 test "`ix DVDRAMs $i`" = 1 && DVDRAM="$DVDRAM `ix DEVICES $i`"
102 test "`ix DVDRWs $i`" = 1 && DVDRW="$DVDRW `ix DEVICES $i`"
105 test "`ix DVDs $i`" = 1 && DVD="$DVD `ix DEVICES $i`"
108 test "`ix CDRWs $i`" = 1 && CDRW="$CDRW `ix DEVICES $i`"
111 test "`ix CDRs $i`" = 1 && CDR="$CDR `ix DEVICES $i`"
114 test "`ix CDMRWs $i`" = 1 && CDMRW="$CDMRW `ix DEVICES $i`"
117 test "`ix CDMs $i`" = 1 && CDM="$CDM `ix DEVICES $i`"
120 CD="$CD `ix DEVICES $i`"
124 if test "$DEBUG" = 1; then
125 echo 'Devices:' `for i in $Count; do ix DEVICES $i; echo -n \ ; done`
126 echo 'DVDRAM :' `for i in $Count; do ix DVDRAMs $i; echo -n \ ; done` $DVDRAM
127 echo 'DVDRW :' `for i in $Count; do ix DVDRWs $i; echo -n \ ; done` $DVDRW
128 echo 'DVD :' `for i in $Count; do ix DVDs $i; echo -n \ ; done` $DVD
129 echo 'CDRW :' `for i in $Count; do ix CDRWs $i; echo -n \ ; done` $CDRW
130 echo 'CD-R :' `for i in $Count; do ix CDRs $i; echo -n \ ; done` $CDR
131 echo 'CDMRW :' `for i in $Count; do ix CDMRWs $i; echo -n \ ; done` $CDMRW
132 echo 'CDM :' `for i in $Count; do ix CDMs $i; echo -n \ ; done` $CDM
133 echo 'CDROM : (all)' $CD
136 # Prepare symlink names output
138 test "`eval echo '$'$3`" = '' && return
141 local DEVLS="`ls -dl \"/dev/$2\" \"/dev/$2\"[0-9]* 2>/dev/null`"
142 local PRESENT="`echo "$DEVLS" |
143 sed -re 's!^.* /dev/('$2'[[:digit:]]*) -> [^[:space:]]+$!\1!'`"
144 for i in `eval echo '$'$3`; do
145 # First, we look for existing symlinks to the target device.
146 local DEVPRESENT="`echo "$DEVLS" |
147 sed -re 's!^.* /dev/('$2'[[:digit:]]*) -> '$i'$!\1!; t X; d; :X'`"
148 if test "$DEVPRESENT" != ""; then
149 # Existing symlinks found - don't output a new one.
150 # If the target dev ($1) is the current dev ($i), we output their names.
151 test "$1" = "$i" && echo " $DEVPRESENT" | sed -e 'N; $ s/\n/ /'
153 # If we found no existing symlinks for the target device...
154 # Find the next available (not present) symlink name.
155 # We always need to do this for reasons of output consistency: if a
156 # symlink is created by udev as a result of use of this program, we
157 # DON'T want different output!
158 until notin PRESENT "$2$COUNT"; do
161 # If the target dev ($1) is the current dev ($i), we output its name.
162 if test $(($NUMBERED_LINKS)) -ne 0 || test "$COUNT" = ''; then
163 test "$i" = "$1" && echo -n " $2$COUNT"
165 # If the link isn't in our "existing links" list, add it and increment
167 if test ! -e "/dev/$2$COUNT"; then
168 PRESENT="$PRESENT\n$2$COUNT"
176 notin OUTPUT CD || echo -n "`output "$1" cdrom CD`"
177 notin OUTPUT CDMRW || echo -n "`output "$1" cdmrw CDM`"
178 notin OUTPUT CDWMRW || echo -n "`output "$1" cdwmrw CDMRW`"
179 notin OUTPUT CDR || echo -n "`output "$1" cd-r CDR`"
180 notin OUTPUT CDRW || echo -n "`output "$1" cdrw CDRW`"
181 notin OUTPUT DVD || echo -n "`output "$1" dvd DVD`"
182 notin OUTPUT DVDRW || echo -n "`output "$1" dvdrw DVDRW`"
183 notin OUTPUT DVDRAM || echo -n "`output "$1" dvdram DVDRAM`"