diff options
Diffstat (limited to 'rule_generator/write_cd_rules')
| -rw-r--r-- | rule_generator/write_cd_rules | 127 |
1 files changed, 127 insertions, 0 deletions
diff --git a/rule_generator/write_cd_rules b/rule_generator/write_cd_rules new file mode 100644 index 0000000000..00382ada2f --- /dev/null +++ b/rule_generator/write_cd_rules @@ -0,0 +1,127 @@ +#!/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="/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 + |