[b2b1e1a] | 1 | #!/bin/sh -e
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| 2 |
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| 3 | # This script is run if an optical drive lacks a rule for persistent naming.
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| 4 | #
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| 5 | # It adds symlinks for optical drives based on the device class determined
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| 6 | # by cdrom_id and used ID_PATH to identify the device.
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| 7 |
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| 8 | # (C) 2006 Marco d'Itri <md@Linux.IT>
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| 9 | #
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| 10 | # This program is free software: you can redistribute it and/or modify
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| 11 | # it under the terms of the GNU General Public License as published by
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| 12 | # the Free Software Foundation, either version 2 of the License, or
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| 13 | # (at your option) any later version.
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| 14 |
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| 15 | # This program is distributed in the hope that it will be useful,
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| 16 | # but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 17 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 18 | # GNU General Public License for more details.
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| 19 |
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| 20 | # You should have received a copy of the GNU General Public License
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| 21 | # along with this program. If not, see <http://www.gnu.org/licenses/>.
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| 22 |
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| 23 | # debug, if UDEV_LOG=<debug>
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| 24 | if [ -n "$UDEV_LOG" ]; then
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| 25 | if [ "$UDEV_LOG" -ge 7 ]; then
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| 26 | set -x
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| 27 | fi
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| 28 | fi
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| 29 |
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| 30 | RULES_FILE="/etc/udev/rules.d/70-persistent-cd.rules"
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| 31 |
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| 32 | . /lib/udev/rule_generator.functions
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| 33 |
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| 34 | find_next_available() {
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| 35 | raw_find_next_available "$(find_all_rules 'SYMLINK\+=' "$1")"
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| 36 | }
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| 37 |
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| 38 | write_rule() {
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| 39 | local match="$1"
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| 40 | local link="$2"
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| 41 | local comment="$3"
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| 42 |
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| 43 | {
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| 44 | if [ "$PRINT_HEADER" ]; then
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| 45 | PRINT_HEADER=
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| 46 | echo "# This file was automatically generated by the $0"
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| 47 | echo "# program, run by the cd-aliases-generator.rules rules file."
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| 48 | echo "#"
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| 49 | echo "# You can modify it, as long as you keep each rule on a single"
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| 50 | echo "# line, and set the \$GENERATED variable."
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| 51 | echo ""
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| 52 | fi
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| 53 |
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| 54 | [ "$comment" ] && echo "# $comment"
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| 55 | echo "$match, SYMLINK+=\"$link\", ENV{GENERATED}=\"1\""
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| 56 | } >> $RULES_FILE
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| 57 | SYMLINKS="$SYMLINKS $link"
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| 58 | }
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| 59 |
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| 60 | if [ -z "$DEVPATH" ]; then
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| 61 | echo "Missing \$DEVPATH." >&2
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| 62 | exit 1
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| 63 | fi
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| 64 | if [ -z "$ID_CDROM" ]; then
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| 65 | echo "$DEVPATH is not a CD reader." >&2
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| 66 | exit 1
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| 67 | fi
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| 68 |
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| 69 | if [ "$1" ]; then
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| 70 | METHOD="$1"
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| 71 | else
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| 72 | METHOD='by-path'
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| 73 | fi
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| 74 |
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| 75 | case "$METHOD" in
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| 76 | by-path)
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| 77 | if [ -z "$ID_PATH" ]; then
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| 78 | echo "$DEVPATH not supported by path_id. by-id may work." >&2
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| 79 | exit 1
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| 80 | fi
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| 81 | RULE="ENV{ID_PATH}==\"$ID_PATH\""
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| 82 | ;;
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| 83 |
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| 84 | by-id)
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| 85 | if [ "$ID_SERIAL" ]; then
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| 86 | RULE="ENV{ID_SERIAL}==\"$ID_SERIAL\""
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| 87 | elif [ "$ID_MODEL" -a "$ID_REVISION" ]; then
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| 88 | RULE="ENV{ID_MODEL}==\"$ID_MODEL\", ENV{ID_REVISION}==\"$ID_REVISION\""
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| 89 | else
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| 90 | echo "$DEVPATH not supported by ata_id. by-path may work." >&2
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| 91 | exit 1
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| 92 | fi
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| 93 | ;;
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| 94 |
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| 95 | *)
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| 96 | echo "Invalid argument (must be either by-path or by-id)." >&2
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| 97 | exit 1
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| 98 | ;;
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| 99 | esac
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| 100 |
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| 101 | # Prevent concurrent processes from modifying the file at the same time.
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| 102 | lock_rules_file
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| 103 |
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| 104 | # Check if the rules file is writeable.
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| 105 | choose_rules_file
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| 106 |
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| 107 | link_num=$(find_next_available 'cdrom[0-9]*')
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| 108 |
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| 109 | match="SUBSYSTEM==\"block\", ENV{ID_CDROM}==\"?*\", $RULE"
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| 110 |
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| 111 | comment="$ID_MODEL ($ID_PATH)"
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| 112 |
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| 113 | write_rule "$match" "cdrom$link_num" "$comment"
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| 114 | [ "$ID_CDROM_CD_R" -o "$ID_CDROM_CD_RW" ] && \
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| 115 | write_rule "$match" "cdrw$link_num"
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| 116 | [ "$ID_CDROM_DVD" ] && \
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| 117 | write_rule "$match" "dvd$link_num"
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| 118 | [ "$ID_CDROM_DVD_R" -o "$ID_CDROM_DVD_RW" -o "$ID_CDROM_DVD_RAM" ] && \
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| 119 | write_rule "$match" "dvdrw$link_num"
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| 120 | echo >> $RULES_FILE
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| 121 |
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| 122 | unlock_rules_file
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| 123 |
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| 124 | echo $SYMLINKS
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| 125 |
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| 126 | exit 0
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