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b97f368d04
Some implementations of `awk` incorrectly parse the \< and \> regex symbols, so use a `while read` loop and regular globbing instead. Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Closes: #259
87 lines
2.0 KiB
Bash
Executable File
87 lines
2.0 KiB
Bash
Executable File
#!/bin/sh
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CONFIG="${CONFIG:-/etc/zfs/zdev.conf}"
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if [ -z "${PATH_ID}" ]; then
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# The path_id helper became a builtin command in udev 174.
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if [ -x '/lib/udev/path_id' ]; then
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PATH_ID='/lib/udev/path_id'
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else
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PATH_ID='udevadm test-builtin path_id'
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fi
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fi
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die() {
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echo "Error: $*"
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exit 1
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}
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usage() {
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cat << EOF
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Usage: zpool_id [-h] [-c configfile] <devpath>
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-c Alternate config file [default /etc/zfs/zdev.conf]
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-d Use path_id from device as the mapping key
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-h Show this message
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EOF
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exit 1
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}
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while getopts 'c:d:h' OPTION; do
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case ${OPTION} in
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c)
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CONFIG="${OPTARG}"
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;;
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d)
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DEVICE="${OPTARG}"
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;;
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h)
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usage
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;;
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esac
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done
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# Check that a device was requested
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[ -z "${DEVICE}" ] && usage
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# Check for the existence of a configuration file
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[ ! -f "${CONFIG}" ] && die "Missing config file: ${CONFIG}"
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# If we are handling a multipath device then $DM_UUID will be
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# exported and we'll use its value (prefixed with dm-uuid per
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# multipathd's naming convention) as our unique persistent key.
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# For traditional devices we'll obtain the key from udev's
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# path_id.
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if [ -n "${DM_UUID}" ] && echo "${DM_UUID}" | grep -q -e '^mpath' ; then
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ID_PATH="dm-uuid-${DM_UUID}"
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else
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eval `${PATH_ID} ${DEVICE}`
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[ -z "${ID_PATH}" ] && die "Missing ID_PATH for ${DEVICE}"
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fi
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# Use the persistent key to lookup the zpool device id in the
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# configuration file which is of the format <device id> <key>.
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# Lines starting with #'s are treated as comments and ignored.
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# Exact matches are required, wild cards are not supported,
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# and only the first match is returned.
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ID_ZPOOL=''
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while read CONFIG_ZPOOL CONFIG_PATH REPLY; do
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if [ "${CONFIG_ZPOOL}" != "${CONFIG_ZPOOL#\#}" ]; then
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# Skip comment lines.
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continue
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fi
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if [ "${CONFIG_PATH}" = "${ID_PATH}" ]; then
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ID_ZPOOL="${CONFIG_ZPOOL}"
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break
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fi
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done <"${CONFIG}"
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[ -z "${ID_ZPOOL}" ] && die "Missing ID_ZPOOL for ID_PATH: ${ID_PATH}"
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if [ -n "${ID_ZPOOL}" ]; then
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echo "ID_PATH=${ID_PATH}"
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echo "ID_ZPOOL=${ID_ZPOOL}"
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echo "ID_ZPOOL_PATH=disk/zpool/${ID_ZPOOL}"
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fi
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exit 0
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