| # /lib/rcscripts/addons/dm-start.sh: Setup DM volumes at boot |
| # $Header: /var/cvsroot/gentoo-x86/sys-fs/lvm2/files/dm-start.sh,v 1.1 2009/04/09 23:00:10 caleb Exp $ |
| |
| # char **get_new_dm_volumes(void) |
| # |
| # Return dmsetup commands to setup volumes |
| get_new_dm_volumes() { |
| local volume params |
| |
| # Filter comments and blank lines |
| grep -v -e '^[[:space:]]*\(#\|$\)' /etc/dmtab | \ |
| while read volume params ; do |
| # If it exists, skip it |
| dmvolume_exists "${volume%:}" && continue |
| # Assemble the command to run to create volume |
| echo "echo ${params} | /sbin/dmsetup create ${volume%:}" |
| done |
| |
| return 0 |
| } |
| |
| # int dmvolume_exists(volume) |
| # |
| # Return true if volume exists in DM table |
| dmvolume_exists() { |
| local x line volume=$1 |
| |
| [ -z "${volume}" ] && return 1 |
| |
| /sbin/dmsetup ls 2>/dev/null | \ |
| while read line ; do |
| for x in ${line} ; do |
| # the following conditonal return only breaks out |
| # of the while loop, as it is running in a pipe. |
| [ "${x}" = "${volume}" ] && return 1 |
| # We only want to check the volume name |
| break |
| done |
| done |
| |
| # if 1 was returned from the above loop, then indicate that |
| # volume exists |
| [ $? = 1 ] && return 0 |
| |
| # otherwise the loop exited normally and the volume does not |
| # exist |
| return 1 |
| } |
| |
| # int is_empty_dm_volume(volume) |
| # |
| # Return true if the volume exists in DM table, but is empty/non-valid |
| is_empty_dm_volume() { |
| local table volume=$1 |
| |
| set -- $(/sbin/dmsetup table 2>/dev/null | grep -e "^${volume}:") |
| [ "${volume}" = "$1" -a -z "$2" ] |
| } |
| |
| local x volume |
| |
| if [ -x /sbin/dmsetup -a -c /dev/mapper/control -a -f /etc/dmtab ] ; then |
| [ -n "$(get_new_dm_volumes)" ] && \ |
| einfo " Setting up device-mapper volumes:" |
| |
| get_new_dm_volumes | \ |
| while read x ; do |
| [ -n "${x}" ] || continue |
| |
| volume="${x##* }" |
| |
| ebegin " Creating volume: ${volume}" |
| if ! eval "${x}" >/dev/null 2>/dev/null ; then |
| eend 1 " Error creating volume: ${volume}" |
| # dmsetup still adds an empty volume in some cases, |
| # so lets remove it |
| is_empty_dm_volume "${volume}" && \ |
| /sbin/dmsetup remove "${volume}" 2>/dev/null |
| else |
| eend 0 |
| fi |
| done |
| fi |
| |
| |
| # vim:ts=4 |