#!/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, either version 2 of the License, or # (at your option) any later version. # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # You should have received a copy of the GNU General Public License # along with this program. If not, see <http://www.gnu.org/licenses/>. # debug, if UDEV_LOG=<debug> if [ -n "$UDEV_LOG" ]; then if [ "$UDEV_LOG" -ge 7 ]; then set -x fi fi RULES_FILE="@udevconfdir@/rules.d/70-persistent-cd.rules" . @udevlibexecdir@/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