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- #!/bin/sh -e
-
- # This script is run if an optical drive lacks a rule for persistent naming.
- #
- # It adds symlinks for optical drives based on the device class determined
- # by cdrom_id and used ID_PATH to identify the device.
- #
- # (C) 2006 Marco d'Itri <md@Linux.IT>
- #
- # This program is free software; you can redistribute it and/or modify it
- # under the terms of the GNU General Public License as published by the
- # Free Software Foundation version 2 of the License.
-
- # debug, if UDEV_LOG=<debug>
- if [ -n "$UDEV_LOG" ]; then
- if [ "$UDEV_LOG" -ge 7 ]; then
- set -x
- fi
- fi
-
- RULES_FILE="/etc/udev/rules.d/70-persistent-cd.rules"
-
- . /lib/udev/rule_generator.functions
-
- find_next_available() {
- raw_find_next_available "$(find_all_rules 'SYMLINK\+=' "$1")"
- }
-
- write_rule() {
- local match="$1"
- local link="$2"
- local comment="$3"
-
- {
- if [ "$PRINT_HEADER" ]; then
- PRINT_HEADER=
- echo "# This file was automatically generated by the $0"
- echo "# program, run by the cd-aliases-generator.rules rules file."
- echo "#"
- echo "# You can modify it, as long as you keep each rule on a single"
- echo "# line, and set the \$GENERATED variable."
- echo ""
- fi
-
- [ "$comment" ] && echo "# $comment"
- echo "$match, SYMLINK+=\"$link\", ENV{GENERATED}=\"1\""
- } >> $RULES_FILE
- SYMLINKS="$SYMLINKS $link"
- }
-
- if [ -z "$DEVPATH" ]; then
- echo "Missing \$DEVPATH." >&2
- exit 1
- fi
- if [ -z "$ID_CDROM" ]; then
- echo "$DEVPATH is not a CD reader." >&2
- exit 1
- fi
-
- if [ "$1" ]; then
- METHOD="$1"
- else
- METHOD='by-path'
- fi
-
- case "$METHOD" in
- by-path)
- if [ -z "$ID_PATH" ]; then
- echo "$DEVPATH not supported by path_id. by-id may work." >&2
- exit 1
- fi
- RULE="ENV{ID_PATH}==\"$ID_PATH\""
- ;;
-
- by-id)
- if [ "$ID_SERIAL" ]; then
- RULE="ENV{ID_SERIAL}==\"$ID_SERIAL\""
- elif [ "$ID_MODEL" -a "$ID_REVISION" ]; then
- RULE="ENV{ID_MODEL}==\"$ID_MODEL\", ENV{ID_REVISION}==\"$ID_REVISION\""
- else
- echo "$DEVPATH not supported by ata_id. by-path may work." >&2
- exit 1
- fi
- ;;
-
- *)
- echo "Invalid argument (must be either by-path or by-id)." >&2
- exit 1
- ;;
- esac
-
- # Prevent concurrent processes from modifying the file at the same time.
- lock_rules_file
-
- # Check if the rules file is writeable.
- choose_rules_file
-
- link_num=$(find_next_available 'cdrom[0-9]*')
-
- match="SUBSYSTEM==\"block\", ENV{ID_CDROM}==\"?*\", $RULE"
-
- comment="$ID_MODEL ($ID_PATH)"
-
- write_rule "$match" "cdrom$link_num" "$comment"
- [ "$ID_CDROM_CD_R" -o "$ID_CDROM_CD_RW" ] && \
- write_rule "$match" "cdrw$link_num"
- [ "$ID_CDROM_DVD" ] && \
- write_rule "$match" "dvd$link_num"
- [ "$ID_CDROM_DVD_R" -o "$ID_CDROM_DVD_RW" -o "$ID_CDROM_DVD_RAM" ] && \
- write_rule "$match" "dvdrw$link_num"
- echo >> $RULES_FILE
-
- unlock_rules_file
-
- echo $SYMLINKS
-
- exit 0
-
-