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#!/bin/bash
###############################################################################
# GLOBALS
#
declare -rg FLAG="/tmp/openslx.disk"
declare -rg OPENSLX_SYS_MOUNT="/opt/openslx/system"
#
# END GLOBALS
###############################################################################
###############################################################################
# FUNCTION DEFINITIONS
#
# helper to mount the OPENSLX_SYS partition to /opt/openslx/system
# Usage: mount_sys_part <path_to_sys_partition>
mount_sys_part() {
if [ ! -b "$1" ]; then
warn "'$1' is not a block device?"
echo "!block: $1" >> /tmp/openslx.disk.log
return 1
fi
local OPENSLX_SYS_DEVICE="$1"
mkdir -p ${OPENSLX_SYS_MOUNT}
if ! mount -t auto "${OPENSLX_SYS_DEVICE}" "${OPENSLX_SYS_MOUNT}"; then
warn "Mounting '${OPENSLX_SYS_DEVICE}' to '${OPENSLX_SYS_MOUNT}' failed."
echo "mount phail" >> /tmp/openslx.disk.log
return 1
fi
return 0
}
#
# END FUNCTION DEFINITIONS
###############################################################################
###############################################################################
# MAIN CODE
#
command -v warn >/dev/null || . /lib/dracut-lib.sh
# let check the arguments
if [ "$#" -ne 2 ]; then
warn "'$0' need 2 arguments: '$0 [OPENSLX_SYS|OPENSLX_TMP] <dev_path>'"
echo "Not enough args!" >> /tmp/openslx.disk.log
exit 1
fi
# $1 sane?
if [ "x$1" != "xOPENSLX_SYS" ] && [ "x$1" != "xOPENSLX_TMP" ]; then
warn "First arg needs to be either 'OPENSLX_SYS' or 'OPENSLX_TMP'."
warn "Given: $1"
echo "OPENSLX? $1" >> /tmp/openslx.disk.log
exit 1
fi
# $2 sane?
if [ ! -b "/dev/$2" ]; then
warn "Second arg appears not to be a block device!"
echo "block? $2" >> /tmp/openslx.disk.log
exit 1
fi
# ok all seems well
PART_TYPE="$1"
PART_DEV="/dev/$2"
# lets check if we are already running
INSTANCES="$(grep "$PART_TYPE" "$FLAG" | busybox wc -l)"
if [ "$INSTANCES" -ge 1 ]; then
# uhoh we are not alone!
warn "'$0' already running for $PART_TYPE ... ignoring."
echo "already running for $PART_TYPE" >> /tmp/openslx.disk.log
exit 1
fi
# now comes the funny part. We write our pid to $FLAG in order to make sure
# we are the only instance of this script running.
echo "$PART_TYPE.$$" >> "$FLAG"
# if we are still here, then we can go on and process the partition
echo "Processing: $PART_TYPE -> $PART_DEV" >> /tmp/openslx.disk.log
if [ "$PART_TYPE" = "OPENSLX_TMP" ]; then
# mark it for later mounting!
echo "$PART_DEV" > /tmp/openslx.disk.tmp
exit 0
fi
if [ "$PART_TYPE" = "OPENSLX_SYS" ]; then
# mount it now, since qemu-nbd needs it asap!
exit $(mount_sys_part "$PART_DEV")
fi
#
# END MAIN CODE
###############################################################################
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