3 # This script is run if an optical drive lacks a rule for persistent naming.
5 # It adds symlinks for optical drives based on the device class determined
6 # by cdrom_id and used ID_PATH to identify the device.
8 # (C) 2006 Marco d'Itri <md@Linux.IT>
10 # This program is free software; you can redistribute it and/or modify it
11 # under the terms of the GNU General Public License as published by the
12 # Free Software Foundation version 2 of the License.
14 # debug, if UDEV_LOG=<debug>
15 if [ -n "$UDEV_LOG" ]; then
16 if [ "$UDEV_LOG" -ge 7 ]; then
21 RULES_FILE="/etc/udev/rules.d/70-persistent-cd.rules"
23 . /lib/udev/rule_generator.functions
25 find_next_available() {
26 raw_find_next_available "$(find_all_rules 'SYMLINK\+=' "$1")"
35 if [ "$PRINT_HEADER" ]; then
37 echo "# This file was automatically generated by the $0"
38 echo "# program, run by the cd-aliases-generator.rules rules file."
40 echo "# You can modify it, as long as you keep each rule on a single"
41 echo "# line, and set the \$GENERATED variable."
45 [ "$comment" ] && echo "# $comment"
46 echo "$match, SYMLINK+=\"$link\", ENV{GENERATED}=\"1\""
48 SYMLINKS="$SYMLINKS $link"
51 if [ -z "$DEVPATH" ]; then
52 echo "Missing \$DEVPATH." >&2
55 if [ -z "$ID_CDROM" ]; then
56 echo "$DEVPATH is not a CD reader." >&2
68 if [ -z "$ID_PATH" ]; then
69 echo "$DEVPATH not supported by path_id. by-id may work." >&2
72 RULE="ENV{ID_PATH}==\"$ID_PATH\""
76 if [ "$ID_SERIAL" ]; then
77 RULE="ENV{ID_SERIAL}==\"$ID_SERIAL\""
78 elif [ "$ID_MODEL" -a "$ID_REVISION" ]; then
79 RULE="ENV{ID_MODEL}==\"$ID_MODEL\", ENV{ID_REVISION}==\"$ID_REVISION\""
81 echo "$DEVPATH not supported by ata_id. by-path may work." >&2
87 echo "Invalid argument (must be either by-path or by-id)." >&2
92 # Prevent concurrent processes from modifying the file at the same time.
95 # Check if the rules file is writeable.
98 link_num=$(find_next_available 'cdrom[0-9]*')
100 match="SUBSYSTEM==\"block\", ENV{ID_CDROM}==\"?*\", $RULE"
102 comment="$ID_MODEL ($ID_PATH)"
104 write_rule "$match" "cdrom$link_num" "$comment"
105 [ "$ID_CDROM_CD_R" -o "$ID_CDROM_CD_RW" ] && \
106 write_rule "$match" "cdrw$link_num"
107 [ "$ID_CDROM_DVD" ] && \
108 write_rule "$match" "dvd$link_num"
109 [ "$ID_CDROM_DVD_R" -o "$ID_CDROM_DVD_RW" -o "$ID_CDROM_DVD_RAM" ] && \
110 write_rule "$match" "dvdrw$link_num"