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 RULES_FILE="/etc/udev/rules.d/70-persistent-cd.rules"
16 . /lib/udev/rule_generator.functions
18 find_next_available() {
19 raw_find_next_available "$(find_all_rules 'SYMLINK+=' "$1")"
28 if [ "$PRINT_HEADER" ]; then
30 echo "# This file was automatically generated by the $0"
31 echo "# program, probably run by the cd-aliases-generator.rules rules file."
33 echo "# You can modify it, as long as you keep each rule on a single line"
34 echo "# and set the \$GENERATED variable."
38 [ "$comment" ] && echo "# $comment"
39 echo "$match, SYMLINK+=\"$link\", ENV{GENERATED}=\"1\""
41 SYMLINKS="$SYMLINKS $link"
44 if [ -z "$DEVPATH" ]; then
45 echo "Missing \$DEVPATH." >&2
48 if [ -z "$ID_CDROM" ]; then
49 echo "$DEVPATH is not a CD reader." >&2
61 if [ -z "$ID_PATH" ]; then
62 echo "$DEVPATH not supported by path_id. by-id may work." >&2
65 RULE="ENV{ID_PATH}==\"$ID_PATH\""
69 if [ "$ID_SERIAL" ]; then
70 RULE="ENV{ID_SERIAL}==\"$ID_SERIAL\""
71 elif [ "$ID_MODEL" -a "$ID_REVISION" ]; then
72 RULE="ENV{ID_MODEL}==\"$ID_MODEL\", ENV{ID_REVISION}==\"$ID_REVISION\""
74 echo "$DEVPATH not supported by ata_id. by-path may work." >&2
80 echo "Invalid argument (must be either by-path or by-id)." >&2
85 # Prevent concurrent processes from modifying the file at the same time.
88 # Check if the rules file is writeable.
91 link_num=$(find_next_available 'cdrom[0-9]*')
93 match="ENV{ID_CDROM}==\"?*\", $RULE"
95 comment="$ID_MODEL ($ID_PATH)"
97 write_rule "$match" "cdrom$link_num" "$comment"
98 [ "$ID_CDROM_CD_R" -o "$ID_CDROM_CD_RW" ] && \
99 write_rule "$match" "cdrw$link_num"
100 [ "$ID_CDROM_DVD" ] && \
101 write_rule "$match" "dvd$link_num"
102 [ "$ID_CDROM_DVD_R" -o "$ID_CDROM_DVD_RW" -o "$ID_CDROM_DVD_RAM" ] && \
103 write_rule "$match" "dvdrw$link_num"