mirror_zfs/cmd/zpool_id/zpool_id
Brian Behlendorf c9c0d073da Add build system
Add autoconf style build infrastructure to the ZFS tree.  This
includes autogen.sh, configure.ac, m4 macros, some scripts/*,
and makefiles for all the core ZFS components.
2010-08-31 13:41:27 -07:00

61 lines
1.4 KiB
Bash
Executable File

#!/bin/bash
CONFIG=${CONFIG:-/etc/zfs/zdev.conf}
PATH_ID=${PATH_ID:-/lib/udev/path_id}
AWK=${AWK:-/bin/awk}
die() {
echo "Error: $*"
exit 1
}
usage() {
cat << EOF
Usage: zpool_id [h] [-c configfile] <devpath>
-c Alternate config file [default /etc/zfs/zdev.conf]
-d Use path_id from device as the mapping key
-h Show this message
EOF
exit 1
}
while getopts 'c:d:h' OPTION; do
case ${OPTION} in
c)
CONFIG=${OPTARG}
;;
d)
DEVICE=${OPTARG}
;;
h)
usage
;;
esac
done
# Check that a device was requested
[ -z ${DEVICE} ] && usage
# Check for the existence of a configuration file
[ ! -f ${CONFIG} ] && die "Missing config file: ${CONFIG}"
# Use udev's path_id to generate a unique persistent key
eval `${PATH_ID} ${DEVICE}`
[ -z ${ID_PATH} ] && die "Missing ID_PATH for ${DEVICE}"
# Use the persistent key to lookup the zpool device id in the
# configuration file which is of the format <device id> <key>.
# Lines starting with #'s are treated as comments and ignored.
# Exact matches are required, wild cards are not supported,
# and only the first match is returned.
ID_ZPOOL=`${AWK} "/${ID_PATH}\>/ && !/^#/ { print \\$1; exit }" ${CONFIG}`
[ -z ${ID_ZPOOL} ] && die "Missing ID_ZPOOL for ID_PATH: ${ID_PATH}"
if [ ${ID_ZPOOL} ]; then
echo "ID_PATH=${ID_PATH}"
echo "ID_ZPOOL=${ID_ZPOOL}"
echo "ID_ZPOOL_PATH=disk/zpool/${ID_ZPOOL}"
fi
exit 0