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