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-rw-r--r--udev/contrib/debian/write_cd_aliases120
1 files changed, 120 insertions, 0 deletions
diff --git a/udev/contrib/debian/write_cd_aliases b/udev/contrib/debian/write_cd_aliases
new file mode 100644
index 0000000..ea8eeb7
--- /dev/null
+++ b/udev/contrib/debian/write_cd_aliases
@@ -0,0 +1,120 @@
+#!/bin/sh -e
+
+# Updated for LFS by B. Dubbs, 2012-09-23
+# Fix RULES_LOCK location
+
+
+RULES_FILE="/etc/udev/rules.d/82-persistent-cd.rules"
+
+##############################################################################
+lock_rules_file() {
+ RULES_LOCK="/run/udev/lock-${RULES_FILE##*/}"
+
+ if [ ! -d /run/udev/ ]; then
+ echo "write_cd_aliases: /run/udev does not exist!" >&2
+ exit 2
+ fi
+
+ retry=10
+ while ! mkdir $RULES_LOCK 2> /dev/null; do
+ if [ $retry -eq 0 ]; then
+ echo "Cannot lock $RULES_FILE!" >&2
+ exit 2
+ fi
+ sleep 1
+ retry=$(($retry - 1))
+ done
+}
+
+unlock_rules_file() {
+ rmdir $RULES_LOCK || true
+}
+
+##############################################################################
+find_next_available() {
+ # use echo to convert newlines to spaces
+ local links=`echo $(find_all_symlinks $1)`
+ local basename=${links%%[ 0-9]*}
+ local max=-1
+ for name in $links; do
+ local num=${name#$basename}
+ [ "$num" ] || num=0
+ [ $num -gt $max ] && max=$num
+ done
+
+ max=$(($max + 1))
+ # "name0" actually is just "name"
+ [ $max -eq 0 ] && return
+ echo "$max"
+}
+
+find_all_symlinks() {
+ local linkre="$1"
+ local match="$2"
+
+ [ -e $RULES_FILE ] || return
+
+ local search='.*[[:space:],]SYMLINK+="\('"$linkre"'\)"[[:space:]]*\(,.*\|\\\|\)$'
+
+ sed -n -e "${match}s/${search}/\1/p" $RULES_FILE
+}
+
+write_rule() {
+ local match="$1"
+ local link="$2"
+ local comment="$3"
+
+ [ -e "$RULES_FILE" ] || PRINT_HEADER=1
+ {
+ if [ "$PRINT_HEADER" ]; then
+ PRINT_HEADER=
+ echo "# This file was automatically generated by the $0"
+ echo "# program, probably run by the 83-cdrom.rules rules file."
+ echo "#"
+ echo "# You can modify it, as long as you keep each rule on a single line"
+ echo "# and set the \$GENERATED variable."
+ echo ""
+ fi
+
+ [ "$comment" ] && echo "# $comment"
+ echo "ACTION==\"add\", SUBSYSTEM==\"block\", $match, ENV{ID_CDROM}==\"1\", SYMLINK+=\"$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
+
+# Prevent parallel processes from modifying the file at the same time.
+lock_rules_file
+
+link_num=$(find_next_available 'cdrom[0-9]*')
+
+#match="ENV{ID_PATH}==\"$ID_PATH\""
+
+#kernel=${DEVPATH##*/}
+#match="KERNEL==\"$kernel\""
+
+id=${PHYSDEVPATH##*/}
+match="BUS==\"$PHYSDEVBUS\", ID==\"$id\""
+
+comment="$ID_MODEL ($ID_PATH)"
+
+ write_rule "$match" "cdrom$link_num" "$comment"
+[ "$ID_CDROM_CD_RW" ] && write_rule "$match" "cdrw$link_num"
+[ "$ID_CDROM_DVD" ] && write_rule "$match" "dvd$link_num"
+[ "$ID_CDROM_DVD_RW" ] && write_rule "$match" "dvdrw$link_num"
+
+unlock_rules_file
+
+echo $SYMLINKS
+
+exit 0
+