tests: add blkid --offset test

Signed-off-by: Karel Zak <kzak@redhat.com>

tests/expected/blkid/offset

@@ -0,0 +1,41 @@
+Checking that no-one is using this disk right now ... OK
+
+Disk <removed>: 50 MiB, 52428800 bytes, 102400 sectors
+Disk model: scsi_debug      
+Units: sectors of 1 * 512 = 512 bytes
+Sector size (logical/physical): 512 bytes / 512 bytes
+I/O size (minimum/optimal): 512 bytes / <removed> bytes
+
+>>> Script header accepted.
+>>> Script header accepted.
+>>> Created a new disklabel.
+<removed>1: Created a new partition <removed>.
+<removed>2: Created a new partition <removed>.
+<removed>3: Created a new partition <removed>.
+<removed>4: Created a new partition <removed>.
+<removed>5: Done.
+
+New situation:
+Disklabel type: gpt
+Disk identifier: <removed>
+
+Device             Start    End Sectors Size Type
+<removed>1   2048  12287   10240   5M Linux filesystem
+<removed>2  12288  22527   10240   5M Linux filesystem
+<removed>3  22528  32767   10240   5M Linux filesystem
+<removed>4  32768 100351   67584  33M Linux filesystem
+
+The partition table has been altered.
+Calling ioctl() to re-read partition table.
+Syncing disks.
+ID_FS_LABEL=FOO
+ID_FS_LABEL_ENC=FOO
+ID_FS_UUID=ccf3dc28-f697-4577-971b-0bc79300a700
+ID_FS_UUID_ENC=ccf3dc28-f697-4577-971b-0bc79300a700
+ID_FS_VERSION=1.0
+ID_FS_FSBLOCKSIZE=1024
+ID_FS_BLOCK_SIZE=1024
+ID_FS_FSLASTBLOCK=5120
+ID_FS_FSSIZE=5242880
+ID_FS_TYPE=ext2
+ID_FS_USAGE=filesystem

tests/ts/blkid/offset

@@ -0,0 +1,58 @@
+#!/bin/bash
+
+# This file is part of util-linux.
+#
+# This file is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This file is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+TS_TOPDIR="${0%/*}/../.."
+TS_DESC="offset"
+
+. "$TS_TOPDIR"/functions.sh
+ts_init "$*"
+
+ts_check_test_command "$TS_CMD_SFDISK"
+ts_check_test_command "$TS_CMD_BLKID"
+ts_check_test_command "$TS_CMD_PARTX"
+
+ts_check_prog "mkfs.ext2"
+ts_skip_nonroot
+
+# set global variable TS_DEVICE
+ts_scsi_debug_init dev_size_mb=50 sector_size=512
+
+$TS_CMD_SFDISK ${TS_DEVICE} >> $TS_OUTPUT 2>> $TS_ERRLOG <<EOF
+label: gpt
+label-id: b181c399-4711-4c52-8b65-9e764541218d
+
+,5M,L
+,5M,L
+,5M,L
+, ,
+EOF
+ts_fdisk_clean $TS_DEVICE
+udevadm settle
+
+
+mkfs.ext2 -L FOO -U ccf3dc28-f697-4577-971b-0bc79300a700 ${TS_DEVICE}2 &> /dev/null
+udevadm settle
+ts_device_has "TYPE" "ext2" ${TS_DEVICE}2 ||
+		ts_die "Cannot find ext2 on ${TS_DEVICE}2"
+
+DEVNAME=$(basename $TS_DEVICE)
+offset=$(( $(cat /sys/block/${DEVNAME}/${DEVNAME}2/start) * 512))
+size=$(( $(cat /sys/block/${DEVNAME}/${DEVNAME}2/size) * 512))
+
+$TS_CMD_PARTX --delete ${TS_DEVICE} &> /dev/null
+
+$TS_CMD_BLKID -p -o udev --offset=${offset} --size=${size} $TS_DEVICE \
+		>> $TS_OUTPUT 2>> $TS_ERRLOG
+
+ts_finalize