Merge branch 'travis-root-checks-v2' of https://github.com/rudimeier/util-linux

* 'travis-root-checks-v2' of https://github.com/rudimeier/util-linux:
  travis-ci: enable root checks
  travis-ci: minor cleanup and speedup
  tests: introduce TS_CMD_UUIDGEN (never use installed one)
  tests, don't write TS_DEVICE to stdout anymore
  tests: ts_scsi_debug_init must not run in a subshell
  tests: cleanup ts_scsi_debug_init
  tests: some more tests need loop support
  tests: ts_device_init requires loop support
  tests: use ts_check_losetup in losetup test
  tests: add function ts_check_losetup
  tests: ts_device_init remove useless error handling

47 files changed, 194 insertions, 135 deletions

diff --git a/tests/ts/blkid/md-raid0-whole b/tests/ts/blkid/md-raid0-whole
index 46442bb2a..5cf2eea08 100755
--- a/tests/ts/blkid/md-raid0-whole
+++ b/tests/ts/blkid/md-raid0-whole
@@ -26,6 +26,7 @@ ts_check_test_command "$TS_CMD_FDISK"
 ts_check_test_command "$TS_CMD_BLKID"
 
 ts_skip_nonroot
+ts_check_losetup
 [ -x /sbin/mdadm ] || ts_skip "missing mdadm"
 
 set -o pipefail
diff --git a/tests/ts/blkid/md-raid1-part b/tests/ts/blkid/md-raid1-part
index 0257e15a8..6a59037e4 100755
--- a/tests/ts/blkid/md-raid1-part
+++ b/tests/ts/blkid/md-raid1-part
@@ -27,10 +27,11 @@ ts_check_test_command "$TS_CMD_BLKID"
 
 ts_skip_nonroot
 
-DEVICE=$(ts_scsi_debug_init dev_size_mb=51 sector_size=512)
+# set global variable TS_DEVICE
+ts_scsi_debug_init dev_size_mb=51 sector_size=512
 
 ts_log "Create partitions"
-$TS_CMD_FDISK ${DEVICE} >> $TS_OUTPUT 2>&1 <<EOF
+$TS_CMD_FDISK ${TS_DEVICE} >> $TS_OUTPUT 2>&1 <<EOF
 n
 p
 1
@@ -47,7 +48,7 @@ q
 EOF
 
 # replace generated ID with something stable
-$TS_CMD_FDISK ${DEVICE} &> /dev/null <<EOF
+$TS_CMD_FDISK ${TS_DEVICE} &> /dev/null <<EOF
 x
 i
 0x1
@@ -63,24 +64,24 @@ MD_DEVICE=/dev/${MD_DEVNAME}
 ts_log "Create RAID1 device"
 /sbin/mdadm -q -S ${MD_DEVICE} &> /dev/null
 /sbin/mdadm -q --create ${MD_DEVICE} --metadata=0.90 --chunk=64 --level=1 \
-	    --raid-devices=2 ${DEVICE}1 ${DEVICE}2 >> $TS_OUTPUT 2>&1
+	    --raid-devices=2 ${TS_DEVICE}1 ${TS_DEVICE}2 >> $TS_OUTPUT 2>&1
 udevadm settle
 
 ts_log "Probe whole-disk"
-$TS_CMD_BLKID -p -o udev ${DEVICE} 2>&1 | sort >> $TS_OUTPUT
+$TS_CMD_BLKID -p -o udev ${TS_DEVICE} 2>&1 | sort >> $TS_OUTPUT
 
 ts_log "Probe first RAID member"
-$TS_CMD_BLKID -p -o udev ${DEVICE}1 2>&1 | sort >> $TS_OUTPUT
+$TS_CMD_BLKID -p -o udev ${TS_DEVICE}1 2>&1 | sort >> $TS_OUTPUT
 
 ts_log "Probe second RAID member"
-$TS_CMD_BLKID -p -o udev ${DEVICE}2 2>&1 | sort >> $TS_OUTPUT
+$TS_CMD_BLKID -p -o udev ${TS_DEVICE}2 2>&1 | sort >> $TS_OUTPUT
 
 /sbin/mdadm -q -S ${MD_DEVICE} >> $TS_OUTPUT 2>&1
 
 udevadm settle
 rmmod scsi_debug
 
-ts_fdisk_clean $DEVICE
+ts_fdisk_clean $TS_DEVICE
 # substitue UUIDs and major/minor number before comparison
 sed -i \
   -e         's/^\(ID_FS_UUID\)=.*/\1=__ts_uuid__/' \
diff --git a/tests/ts/blkid/md-raid1-whole b/tests/ts/blkid/md-raid1-whole
index fcb55c2a4..0ec6c1582 100755
--- a/tests/ts/blkid/md-raid1-whole
+++ b/tests/ts/blkid/md-raid1-whole
@@ -26,6 +26,7 @@ ts_check_test_command "$TS_CMD_FDISK"
 ts_check_test_command "$TS_CMD_BLKID"
 
 ts_skip_nonroot
+ts_check_losetup
 [ -x /sbin/mdadm ] || ts_skip "missing mdadm"
 
 set -o pipefail
diff --git a/tests/ts/cramfs/doubles b/tests/ts/cramfs/doubles
index 9b1ce2eb3..7393fc7dc 100755
--- a/tests/ts/cramfs/doubles
+++ b/tests/ts/cramfs/doubles
@@ -26,6 +26,7 @@ ts_check_test_command "$TS_CMD_MOUNT"
 ts_check_test_command "$TS_CMD_UMOUNT"
 
 ts_skip_nonroot
+ts_check_losetup
 
 set -o pipefail
 
diff --git a/tests/ts/cramfs/mkfs b/tests/ts/cramfs/mkfs
index 96d6855d7..70c827591 100755
--- a/tests/ts/cramfs/mkfs
+++ b/tests/ts/cramfs/mkfs
@@ -24,9 +24,9 @@ ts_init "$*"
 ts_check_test_command "$TS_CMD_MKCRAMFS"
 ts_check_test_command "$TS_CMD_MOUNT"
 ts_check_test_command "$TS_CMD_UMOUNT"
-ts_check_test_command "$TS_CMD_LOSETUP"
 
 ts_skip_nonroot
+ts_check_losetup
 
 set -o pipefail
 
diff --git a/tests/ts/eject/umount b/tests/ts/eject/umount
index e781a7ba6..2a684669a 100755
--- a/tests/ts/eject/umount
+++ b/tests/ts/eject/umount
@@ -16,6 +16,7 @@ ts_skip_nonroot
 # not removable device.
 #
 
+# set global variable TS_DEVICE
 function init_device {
 	ts_scsi_debug_init dev_size_mb=100
 }
@@ -51,50 +52,50 @@ function deinit_device {
 
 
 ts_init_subtest "by-disk"
-DEVICE=$(init_device)
-$TS_CMD_EJECT --force $DEVICE && ts_log "Success"
+init_device
+$TS_CMD_EJECT --force $TS_DEVICE && ts_log "Success"
 deinit_device
 ts_finalize_subtest
 
 ts_init_subtest "by-disk-mounted"
-DEVICE=$(init_device)
-mkfs.ext2 -q -F $DEVICE
+init_device
+mkfs.ext2 -q -F $TS_DEVICE
 udevadm settle
 mkdir -p $TS_MOUNTPOINT
-mount $DEVICE $TS_MOUNTPOINT
-$TS_CMD_EJECT --force $DEVICE && ts_log "Success"
+mount $TS_DEVICE $TS_MOUNTPOINT
+$TS_CMD_EJECT --force $TS_DEVICE && ts_log "Success"
 deinit_device
 ts_finalize_subtest
 
 
 ts_init_subtest "by-disk-mounted-partition"
-DEVICE=$(init_device)
-init_partitions $DEVICE
+init_device
+init_partitions $TS_DEVICE
 mkdir -p ${TS_MOUNTPOINT}1
 mkdir -p ${TS_MOUNTPOINT}2
-mount ${DEVICE}1 ${TS_MOUNTPOINT}1
-mount ${DEVICE}2 ${TS_MOUNTPOINT}2
-$TS_CMD_EJECT --force $DEVICE && ts_log "Success"
+mount ${TS_DEVICE}1 ${TS_MOUNTPOINT}1
+mount ${TS_DEVICE}2 ${TS_MOUNTPOINT}2
+$TS_CMD_EJECT --force $TS_DEVICE && ts_log "Success"
 deinit_device
 ts_finalize_subtest
 
 
 ts_init_subtest "by-partition"
-DEVICE=$(init_device)
-init_partitions $DEVICE
-$TS_CMD_EJECT --force ${DEVICE}1 && ts_log "Success"
+init_device
+init_partitions $TS_DEVICE
+$TS_CMD_EJECT --force ${TS_DEVICE}1 && ts_log "Success"
 deinit_device
 ts_finalize_subtest
 
 
 ts_init_subtest "by-partition-mounted"
-DEVICE=$(init_device)
-init_partitions $DEVICE
+init_device
+init_partitions $TS_DEVICE
 mkdir -p ${TS_MOUNTPOINT}1
 mkdir -p ${TS_MOUNTPOINT}2
-mount ${DEVICE}1 ${TS_MOUNTPOINT}1
-mount ${DEVICE}2 ${TS_MOUNTPOINT}2
-$TS_CMD_EJECT --force ${DEVICE}1 && ts_log "Success"
+mount ${TS_DEVICE}1 ${TS_MOUNTPOINT}1
+mount ${TS_DEVICE}2 ${TS_MOUNTPOINT}2
+$TS_CMD_EJECT --force ${TS_DEVICE}1 && ts_log "Success"
 deinit_device
 ts_finalize_subtest
 
diff --git a/tests/ts/fdisk/align-512-4K b/tests/ts/fdisk/align-512-4K
index 5d70fe1fa..bdfb5ceca 100755
--- a/tests/ts/fdisk/align-512-4K
+++ b/tests/ts/fdisk/align-512-4K
@@ -30,11 +30,12 @@ ts_check_test_command "$TS_CMD_FDISK"
 
 ts_skip_nonroot
 
-DEVICE=$(ts_scsi_debug_init dev_size_mb=50 sector_size=512 physblk_exp=3)
-DEVNAME=$(basename $DEVICE)
+# set global variable TS_DEVICE
+ts_scsi_debug_init dev_size_mb=50 sector_size=512 physblk_exp=3
+DEVNAME=$(basename $TS_DEVICE)
 
 ts_log "Create partitions"
-$TS_CMD_FDISK ${DEVICE} >> $TS_OUTPUT 2>&1 <<EOF
+$TS_CMD_FDISK ${TS_DEVICE} >> $TS_OUTPUT 2>&1 <<EOF
 n
 p
 1
@@ -74,6 +75,6 @@ cat /sys/block/${DEVNAME}/${DEVNAME}{1,2,3,4,5,6,7}/alignment_offset >> $TS_OUTP
 
 rmmod scsi_debug
 
-ts_fdisk_clean $DEVICE
+ts_fdisk_clean $TS_DEVICE
 
 ts_finalize
diff --git a/tests/ts/fdisk/align-512-4K-63 b/tests/ts/fdisk/align-512-4K-63
index 65f2a7556..e259b5a0a 100755
--- a/tests/ts/fdisk/align-512-4K-63
+++ b/tests/ts/fdisk/align-512-4K-63
@@ -30,11 +30,12 @@ ts_check_test_command "$TS_CMD_FDISK"
 
 ts_skip_nonroot
 
-DEVICE=$(ts_scsi_debug_init dev_size_mb=50 sector_size=512 physblk_exp=3 lowest_aligned=7)
-DEVNAME=$(basename $DEVICE)
+# set global variable TS_DEVICE
+ts_scsi_debug_init dev_size_mb=50 sector_size=512 physblk_exp=3 lowest_aligned=7
+DEVNAME=$(basename $TS_DEVICE)
 
 ts_log "Create partitions"
-$TS_CMD_FDISK ${DEVICE} >> $TS_OUTPUT 2>&1 <<EOF
+$TS_CMD_FDISK ${TS_DEVICE} >> $TS_OUTPUT 2>&1 <<EOF
 n
 p
 1
@@ -74,6 +75,6 @@ cat /sys/block/${DEVNAME}/${DEVNAME}{1,2,3,4,5,6,7}/alignment_offset >> $TS_OUTP
 
 rmmod scsi_debug
 
-ts_fdisk_clean $DEVICE
+ts_fdisk_clean $TS_DEVICE
 
 ts_finalize
diff --git a/tests/ts/fdisk/align-512-4K-md b/tests/ts/fdisk/align-512-4K-md
index 9a2cb88f7..acb6186a6 100755
--- a/tests/ts/fdisk/align-512-4K-md
+++ b/tests/ts/fdisk/align-512-4K-md
@@ -30,11 +30,12 @@ ts_check_test_command "$TS_CMD_FDISK"
 
 ts_skip_nonroot
 
-DEVICE=$(ts_scsi_debug_init dev_size_mb=50 sector_size=512 physblk_exp=3)
-DEVNAME=$(basename $DEVICE)
+# set global variable TS_DEVICE
+ts_scsi_debug_init dev_size_mb=50 sector_size=512 physblk_exp=3
+DEVNAME=$(basename $TS_DEVICE)
 
 ts_log "Create partitions"
-$TS_CMD_FDISK ${DEVICE} >> $TS_OUTPUT 2>&1 <<EOF
+$TS_CMD_FDISK ${TS_DEVICE} >> $TS_OUTPUT 2>&1 <<EOF
 n
 p
 1
@@ -59,7 +60,7 @@ MD_DEVICE=/dev/${MD_DEVNAME}
 
 /sbin/mdadm -q -S ${MD_DEVICE} &> /dev/null
 /sbin/mdadm -q --create ${MD_DEVICE} --metadata=0.90 --chunk=64 \
-	    --level=0 --raid-devices=2 ${DEVICE}1 ${DEVICE}2 >> $TS_OUTPUT 2>&1
+	    --level=0 --raid-devices=2 ${TS_DEVICE}1 ${TS_DEVICE}2 >> $TS_OUTPUT 2>&1
 
 udevadm settle
 ts_log "Create partitions (MD)"
@@ -88,7 +89,7 @@ cat /sys/block/${MD_DEVNAME}/${MD_DEVNAME}p{1,2}/alignment_offset >> $TS_OUTPUT
 udevadm settle
 rmmod scsi_debug
 
-ts_fdisk_clean $DEVICE
+ts_fdisk_clean $TS_DEVICE
 ts_fdisk_clean $MD_DEVICE
 
 ts_finalize
diff --git a/tests/ts/fdisk/align-512-512 b/tests/ts/fdisk/align-512-512
index 8057f9339..21037170e 100755
--- a/tests/ts/fdisk/align-512-512
+++ b/tests/ts/fdisk/align-512-512
@@ -28,6 +28,7 @@ ts_init "$*"
 ts_check_test_command "$TS_CMD_FDISK"
 
 ts_skip_nonroot
+ts_check_losetup
 
 DEVICE=$(ts_device_init 50)
 [ "$?" == 0 ] || ts_die "Cannot init device"
diff --git a/tests/ts/fdisk/align-512-512-topology b/tests/ts/fdisk/align-512-512-topology
index f988b4e42..d291e2f97 100755
--- a/tests/ts/fdisk/align-512-512-topology
+++ b/tests/ts/fdisk/align-512-512-topology
@@ -30,12 +30,12 @@ ts_check_test_command "$TS_CMD_FDISK"
 
 ts_skip_nonroot
 
-
-DEVICE=$(ts_scsi_debug_init dev_size_mb=50 sector_size=512)
-DEVNAME=$(basename $DEVICE)
+# set global variable TS_DEVICE
+ts_scsi_debug_init dev_size_mb=50 sector_size=512
+DEVNAME=$(basename $TS_DEVICE)
 
 ts_log "Create partitions"
-$TS_CMD_FDISK ${DEVICE} >> $TS_OUTPUT 2>&1 <<EOF
+$TS_CMD_FDISK ${TS_DEVICE} >> $TS_OUTPUT 2>&1 <<EOF
 n
 p
 1
@@ -75,6 +75,6 @@ cat /sys/block/${DEVNAME}/${DEVNAME}{1,2,3,4,5,6,7}/alignment_offset >> $TS_OUTP
 
 rmmod scsi_debug
 
-ts_fdisk_clean $DEVICE
+ts_fdisk_clean $TS_DEVICE
 
 ts_finalize
diff --git a/tests/ts/fsck/ismounted b/tests/ts/fsck/ismounted
index 685601613..b7b21fc9e 100755
--- a/tests/ts/fsck/ismounted
+++ b/tests/ts/fsck/ismounted
@@ -24,6 +24,7 @@ ts_check_test_command "$TS_CMD_FDISK"
 ts_check_test_command "$TS_CMD_MOUNT"
 
 ts_skip_nonroot
+ts_check_losetup
 
 set -o pipefail
 
diff --git a/tests/ts/libmount/context b/tests/ts/libmount/context
index 35e1a014e..0cc21ec77 100755
--- a/tests/ts/libmount/context
+++ b/tests/ts/libmount/context
@@ -12,11 +12,13 @@ ts_check_test_command "$TS_CMD_FDISK"
 ts_check_test_command "$TS_CMD_FINDMNT"
 ts_check_test_command "$TS_CMD_MOUNT"
 ts_check_test_command "$TS_CMD_UMOUNT"
+ts_check_test_command "$TS_CMD_UUIDGEN"
 
 ts_skip_nonroot
 TESTPROG="$TS_HELPER_LIBMOUNT_CONTEXT"
 LABEL=libmount-test
-UUID=$(uuidgen)
+UUID=$($TS_CMD_UUIDGEN)
+
 MOUNTPOINT="$TS_MOUNTPOINT"
 TS_NOEXIST="$TS_OUTDIR/${TS_TESTNAME}-${TS_SUBNAME}-noex"
 [ -d $TS_NOEXIST ] && rmdir $TS_NOEXIST
@@ -26,11 +28,12 @@ TS_NOEXIST="$TS_OUTDIR/${TS_TESTNAME}-${TS_SUBNAME}-noex"
 ts_log "Init device"
 umount $MOUNTPOINT &> /dev/null
 
-DEVICE=$(ts_scsi_debug_init dev_size_mb=100)
-DEVNAME=$(basename $DEVICE)
+# set global variable TS_DEVICE
+ts_scsi_debug_init dev_size_mb=100
+DEVNAME=$(basename $TS_DEVICE)
 
 ts_log "Create partitions"
-$TS_CMD_FDISK ${DEVICE} &> /dev/null <<EOF
+$TS_CMD_FDISK ${TS_DEVICE} &> /dev/null <<EOF
 n
 p
 1
@@ -40,7 +43,7 @@ w
 q
 EOF
 
-DEVICE="${DEVICE}1"
+DEVICE="${TS_DEVICE}1"
 
 sleep 1
 udevadm settle
diff --git a/tests/ts/libmount/context-py b/tests/ts/libmount/context-py
index 840634413..14bde41f7 100755
--- a/tests/ts/libmount/context-py
+++ b/tests/ts/libmount/context-py
@@ -12,6 +12,7 @@ ts_check_test_command "$TS_CMD_FDISK"
 ts_check_test_command "$TS_CMD_FINDMNT"
 ts_check_test_command "$TS_CMD_MOUNT"
 ts_check_test_command "$TS_CMD_UMOUNT"
+ts_check_test_command "$TS_CMD_UUIDGEN"
 
 ts_init_py libmount
 ts_skip_nonroot
@@ -20,7 +21,7 @@ TESTPROG="$TS_HELPER_PYLIBMOUNT_CONTEXT"
 
 PYDBG="$PYTHON -m pdb"
 LABEL=libmount-test
-UUID=$(uuidgen)
+UUID=$($TS_CMD_UUIDGEN)
 MOUNTPOINT="$TS_MOUNTPOINT"
 TS_NOEXIST="$TS_OUTDIR/${TS_TESTNAME}-${TS_SUBNAME}-noex"
 [ -d $TS_NOEXIST ] && rmdir $TS_NOEXIST
@@ -28,11 +29,12 @@ TS_NOEXIST="$TS_OUTDIR/${TS_TESTNAME}-${TS_SUBNAME}-noex"
 ts_log "Init device"
 umount $MOUNTPOINT &> /dev/null
 
-DEVICE=$(ts_scsi_debug_init dev_size_mb=100)
-DEVNAME=$(basename $DEVICE)
+# set global variable TS_DEVICE
+ts_scsi_debug_init dev_size_mb=100
+DEVNAME=$(basename $TS_DEVICE)
 
 ts_log "Create partitions"
-$TS_CMD_FDISK ${DEVICE} &> /dev/null <<EOF
+$TS_CMD_FDISK ${TS_DEVICE} &> /dev/null <<EOF
 n
 p
 1
@@ -42,7 +44,7 @@ w
 q
 EOF
 
-DEVICE="${DEVICE}1"
+DEVICE="${TS_DEVICE}1"
 
 sleep 1
 udevadm settle
diff --git a/tests/ts/libmount/context-utab b/tests/ts/libmount/context-utab
index 4d3e3d7ca..c7b94a5bb 100755
--- a/tests/ts/libmount/context-utab
+++ b/tests/ts/libmount/context-utab
@@ -11,20 +11,22 @@ ts_init "$*"
 ts_check_test_command "$TS_CMD_FDISK"
 ts_check_test_command "$TS_CMD_FINDMNT"
 ts_check_test_command "$TS_CMD_WIPEFS"
+ts_check_test_command "$TS_CMD_UUIDGEN"
 ts_skip_nonroot
 
 TESTPROG="$TS_HELPER_LIBMOUNT_CONTEXT"
 LABEL=libmount-test
-UUID=$(uuidgen)
+UUID=$($TS_CMD_UUIDGEN)
 MOUNTPOINT="$TS_MOUNTPOINT"
 
 [ -x $TESTPROG ] || ts_skip "test not compiled"
 
-DEVICE=$(ts_scsi_debug_init dev_size_mb=100)
-DEVNAME=$(basename $DEVICE)
+# set global variable TS_DEVICE
+ts_scsi_debug_init dev_size_mb=100
+DEVNAME=$(basename $TS_DEVICE)
 
 ts_log "Create partitions"
-$TS_CMD_FDISK ${DEVICE} &> /dev/null <<EOF
+$TS_CMD_FDISK ${TS_DEVICE} &> /dev/null <<EOF
 n
 p
 1
@@ -34,7 +36,7 @@ w
 q
 EOF
 
-DEVICE="${DEVICE}1"
+DEVICE="${TS_DEVICE}1"
 
 sleep 1
 udevadm settle
diff --git a/tests/ts/libmount/context-utab-py b/tests/ts/libmount/context-utab-py
index b454ceb54..e03332b37 100755
--- a/tests/ts/libmount/context-utab-py
+++ b/tests/ts/libmount/context-utab-py
@@ -10,6 +10,7 @@ ts_init "$*"
 ts_check_test_command "$TS_CMD_FDISK"
 ts_check_test_command "$TS_CMD_FINDMNT"
 ts_check_test_command "$TS_CMD_WIPEFS"
+ts_check_test_command "$TS_CMD_UUIDGEN"
 
 ts_init_py libmount
 ts_skip_nonroot
@@ -17,14 +18,15 @@ ts_skip_nonroot
 
 TESTPROG="$TS_HELPER_PYLIBMOUNT_CONTEXT"
 LABEL=libmount-test
-UUID=$(uuidgen)
+UUID=$($TS_CMD_UUIDGEN)
 MOUNTPOINT="$TS_MOUNTPOINT"
 
-DEVICE=$(ts_scsi_debug_init dev_size_mb=100)
-DEVNAME=$(basename $DEVICE)
+# set global variable TS_DEVICE
+ts_scsi_debug_init dev_size_mb=100
+DEVNAME=$(basename $TS_DEVICE)
 
 ts_log "Create partitions"
-$TS_CMD_FDISK ${DEVICE} &> /dev/null <<EOF
+$TS_CMD_FDISK ${TS_DEVICE} &> /dev/null <<EOF
 n
 p
 1
@@ -34,7 +36,7 @@ w
 q
 EOF
 
-DEVICE="${DEVICE}1"
+DEVICE="${TS_DEVICE}1"
 
 sleep 1
 udevadm settle
diff --git a/tests/ts/libmount/tabfiles-tags b/tests/ts/libmount/tabfiles-tags
index 318ccf05c..dbc9a57f5 100755
--- a/tests/ts/libmount/tabfiles-tags
+++ b/tests/ts/libmount/tabfiles-tags
@@ -11,17 +11,18 @@ TESTPROG="$TS_HELPER_LIBMOUNT_TAB"
 
 [ -x $TESTPROG ] || ts_skip "test not compiled"
 
-DEVICE=$(ts_scsi_debug_init dev_size_mb=50 sector_size=512)
+# set global variable TS_DEVICE
+ts_scsi_debug_init dev_size_mb=50 sector_size=512
 LABEL="testLibmount"
 UUID="de1bc6e9-34ab-4151-a1d7-900042eee8d9"
 
 #
 # Create filesystem
 #
-mkfs.ext3 -F -L $LABEL $DEVICE -U $UUID &> /dev/null || ts_die "Cannot make ext3 on $DEVICE" $DEVICE
+mkfs.ext3 -F -L $LABEL $TS_DEVICE -U $UUID &> /dev/null || ts_die "Cannot make ext3 on $TS_DEVICE" $TS_DEVICE
 udevadm settle
 
-ts_device_has_uuid $DEVICE || ts_die "Cannot find UUID on $DEVICE" $DEVICE
+ts_device_has_uuid $TS_DEVICE || ts_die "Cannot find UUID on $TS_DEVICE" $TS_DEVICE
 
 FSTAB="$TS_OUTDIR/fstab"
 
@@ -36,7 +37,7 @@ sed -i -e 's/fs: 0x.*/fs:/g' $TS_OUTPUT
 ts_finalize_subtest
 
 ts_init_subtest "fstab-label2dev"
-ts_valgrind $TESTPROG --find-forward $FSTAB source $DEVICE &> $TS_OUTPUT
+ts_valgrind $TESTPROG --find-forward $FSTAB source $TS_DEVICE &> $TS_OUTPUT
 sed -i -e 's/fs: 0x.*/fs:/g' $TS_OUTPUT
 ts_finalize_subtest
 
@@ -60,18 +61,18 @@ ts_finalize_subtest
 
 ts_init_subtest "fstab-dev2label"
 # has to return /mnt/mountpoint
-ts_valgrind $TESTPROG --find-forward $FSTAB source $DEVICE &> $TS_OUTPUT
+ts_valgrind $TESTPROG --find-forward $FSTAB source $TS_DEVICE &> $TS_OUTPUT
 sed -i -e 's/fs: 0x.*/fs:/g' $TS_OUTPUT
 ts_finalize_subtest
 
 #
 # Add devname
 #
-echo "$DEVICE  /mnt/mountpoint3 auto defaults" >> $FSTAB
+echo "$TS_DEVICE  /mnt/mountpoint3 auto defaults" >> $FSTAB
 
 ts_init_subtest "fstab-dev"
 # has to return /mnt/mountpoint3
-ts_valgrind $TESTPROG --find-forward $FSTAB source $DEVICE &> $TS_OUTPUT
+ts_valgrind $TESTPROG --find-forward $FSTAB source $TS_DEVICE &> $TS_OUTPUT
 sed -i -e 's/fs: 0x.*/fs:/g' $TS_OUTPUT
 sed -i -e 's/source: .*//g' $TS_OUTPUT		# devname is generated, remove it
 ts_finalize_subtest
diff --git a/tests/ts/libmount/tabfiles-tags-py b/tests/ts/libmount/tabfiles-tags-py
index 237a6d827..278d70665 100755
--- a/tests/ts/libmount/tabfiles-tags-py
+++ b/tests/ts/libmount/tabfiles-tags-py
@@ -12,17 +12,18 @@ TESTPROG="$TS_HELPER_PYLIBMOUNT_TAB"
 
 PYDBG="$PYTHON -m pdb"
 
-DEVICE=$(ts_scsi_debug_init dev_size_mb=50 sector_size=512)
+# set global variable TS_DEVICE
+ts_scsi_debug_init dev_size_mb=50 sector_size=512
 LABEL="testLibmount"
 UUID="de1bc6e9-34ab-4151-a1d7-900042eee8d9"
 
 #
 # Create filesystem
 #
-mkfs.ext3 -F -L $LABEL $DEVICE -U $UUID &> /dev/null || ts_die "Cannot make ext3 on $DEVICE" $DEVICE
+mkfs.ext3 -F -L $LABEL $TS_DEVICE -U $UUID &> /dev/null || ts_die "Cannot make ext3 on $TS_DEVICE" $TS_DEVICE
 udevadm settle
 
-ts_device_has_uuid $DEVICE || ts_die "Cannot find UUID on $DEVICE" $DEVICE
+ts_device_has_uuid $TS_DEVICE || ts_die "Cannot find UUID on $TS_DEVICE" $TS_DEVICE
 
 FSTAB="$TS_OUTDIR/fstab"
 
@@ -37,7 +38,7 @@ sed -i -e 's/fs: 0x.*/fs:/g' $TS_OUTPUT
 ts_finalize_subtest
 
 ts_init_subtest "fstab-label2dev"
-$PYTHON $TESTPROG --find-forward $FSTAB source $DEVICE &> $TS_OUTPUT
+$PYTHON $TESTPROG --find-forward $FSTAB source $TS_DEVICE &> $TS_OUTPUT
 sed -i -e 's/fs: 0x.*/fs:/g' $TS_OUTPUT
 ts_finalize_subtest
 
@@ -61,18 +62,18 @@ ts_finalize_subtest
 
 ts_init_subtest "fstab-dev2label"
 # has to return /mnt/mountpoint
-$PYTHON $TESTPROG --find-forward $FSTAB source $DEVICE &> $TS_OUTPUT
+$PYTHON $TESTPROG --find-forward $FSTAB source $TS_DEVICE &> $TS_OUTPUT
 sed -i -e 's/fs: 0x.*/fs:/g' $TS_OUTPUT
 ts_finalize_subtest
 
 #
 # Add devname
 #
-echo "$DEVICE  /mnt/mountpoint3 auto defaults" >> $FSTAB
+echo "$TS_DEVICE  /mnt/mountpoint3 auto defaults" >> $FSTAB
 
 ts_init_subtest "fstab-dev"
 # has to return /mnt/mountpoint3
-$PYTHON $TESTPROG --find-forward $FSTAB source $DEVICE &> $TS_OUTPUT
+$PYTHON $TESTPROG --find-forward $FSTAB source $TS_DEVICE &> $TS_OUTPUT
 sed -i -e 's/fs: 0x.*/fs:/g' $TS_OUTPUT
 sed -i -e 's/source: .*//g' $TS_OUTPUT		# devname is generated, remove it
 ts_finalize_subtest
diff --git a/tests/ts/losetup/losetup b/tests/ts/losetup/losetup
index 234c58f6f..804518998 100755
--- a/tests/ts/losetup/losetup
+++ b/tests/ts/losetup/losetup
@@ -24,9 +24,19 @@ ts_init "$*"
 
 ts_check_test_command "$TS_CMD_LOSETUP"
 
+# Before checking for loop support we would need to test if losetup -f works at
+# all. At least we do a simple executable test for now.
+$TS_CMD_LOSETUP --version >/dev/null 2>$TS_OUTPUT || ts_failed
+$TS_CMD_LOSETUP --unknownopt >>$TS_OUTPUT 2>/dev/null && ts_failed
+test -s $TS_OUTPUT && ts_failed
+rm -f $TS_OUTPUT
+
 ts_skip_nonroot
+ts_check_losetup
+
 
-DEVICE=$(ts_scsi_debug_init dev_size_mb=11)
+# set global variable TS_DEVICE
+ts_scsi_debug_init dev_size_mb=11
 REFILE=$(ts_image_init 10)
 
 function lo_print {
@@ -84,7 +94,7 @@ rm -rf $BACKFILE
 #
 # Backing file is a block device
 #
-BACKFILE="$DEVICE"
+BACKFILE="$TS_DEVICE"
 
 ts_init_subtest "blkdev"
 LODEV=$( $TS_CMD_LOSETUP --find --show $BACKFILE )
diff --git a/tests/ts/minix/fsck b/tests/ts/minix/fsck
index 70ad2faa7..cba7c311b 100755
--- a/tests/ts/minix/fsck
+++ b/tests/ts/minix/fsck
@@ -23,6 +23,7 @@ ts_init "$*"
 ts_check_test_command "$TS_CMD_MKMINIX"
 
 ts_skip_nonroot
+ts_check_losetup
 
 set -o pipefail
 
diff --git a/tests/ts/minix/mkfs b/tests/ts/minix/mkfs
index 0159c7b97..f94cb0a4d 100755
--- a/tests/ts/minix/mkfs
+++ b/tests/ts/minix/mkfs
@@ -23,6 +23,7 @@ ts_init "$*"
 ts_check_test_command "$TS_CMD_MKMINIX"
 
 ts_skip_nonroot
+ts_check_losetup
 
 set -o pipefail
 
diff --git a/tests/ts/mount/devname b/tests/ts/mount/devname
index 1cab468d8..bc5895afa 100755
--- a/tests/ts/mount/devname
+++ b/tests/ts/mount/devname
@@ -26,6 +26,7 @@ ts_check_test_command "$TS_CMD_MOUNT"
 ts_check_test_command "$TS_CMD_UMOUNT"
 
 ts_skip_nonroot
+ts_check_losetup
 
 set -o pipefail
 
diff --git a/tests/ts/mount/fstab-devname b/tests/ts/mount/fstab-devname
index 4dcc4fc74..b91127b0d 100755
--- a/tests/ts/mount/fstab-devname
+++ b/tests/ts/mount/fstab-devname
@@ -25,6 +25,7 @@ ts_check_test_command "$TS_CMD_MOUNT"
 ts_check_test_command "$TS_CMD_UMOUNT"
 
 ts_skip_nonroot
+ts_check_losetup
 
 set -o pipefail
 
diff --git a/tests/ts/mount/fstab-devname2label b/tests/ts/mount/fstab-devname2label
index f8040959e..247731668 100755
--- a/tests/ts/mount/fstab-devname2label
+++ b/tests/ts/mount/fstab-devname2label
@@ -26,6 +26,7 @@ ts_check_test_command "$TS_CMD_MOUNT"
 ts_check_test_command "$TS_CMD_UMOUNT"
 
 ts_skip_nonroot
+ts_check_losetup
 
 set -o pipefail
 
diff --git a/tests/ts/mount/fstab-devname2uuid b/tests/ts/mount/fstab-devname2uuid
index f5548265e..ecaaaffe9 100755
--- a/tests/ts/mount/fstab-devname2uuid
+++ b/tests/ts/mount/fstab-devname2uuid
@@ -25,6 +25,7 @@ ts_check_test_command "$TS_CMD_MOUNT"
 ts_check_test_command "$TS_CMD_UMOUNT"
 
 ts_skip_nonroot
+ts_check_losetup
 
 set -o pipefail
 
diff --git a/tests/ts/mount/fstab-label b/tests/ts/mount/fstab-label
index 24fb80f7a..a2664ff3e 100755
--- a/tests/ts/mount/fstab-label
+++ b/tests/ts/mount/fstab-label
@@ -26,6 +26,7 @@ ts_check_test_command "$TS_CMD_MOUNT"
 ts_check_test_command "$TS_CMD_UMOUNT"
 
 ts_skip_nonroot
+ts_check_losetup
 
 set -o pipefail
 
diff --git a/tests/ts/mount/fstab-label2devname b/tests/ts/mount/fstab-label2devname
index b2359a519..feddcdbdb 100755
--- a/tests/ts/mount/fstab-label2devname
+++ b/tests/ts/mount/fstab-label2devname
@@ -26,6 +26,7 @@ ts_check_test_command "$TS_CMD_MOUNT"
 ts_check_test_command "$TS_CMD_UMOUNT"
 
 ts_skip_nonroot
+ts_check_losetup
 
 set -o pipefail
 
diff --git a/tests/ts/mount/fstab-label2uuid b/tests/ts/mount/fstab-label2uuid
index 165426bd7..47f6f80f0 100755
--- a/tests/ts/mount/fstab-label2uuid
+++ b/tests/ts/mount/fstab-label2uuid
@@ -27,6 +27,7 @@ ts_check_test_command "$TS_CMD_MOUNT"
 ts_check_test_command "$TS_CMD_UMOUNT"
 
 ts_skip_nonroot
+ts_check_losetup
 
 set -o pipefail
 
diff --git a/tests/ts/mount/fstab-symlink b/tests/ts/mount/fstab-symlink
index ddabcd645..a903d75fa 100755
--- a/tests/ts/mount/fstab-symlink
+++ b/tests/ts/mount/fstab-symlink
@@ -26,6 +26,7 @@ ts_check_test_command "$TS_CMD_MOUNT"
 ts_check_test_command "$TS_CMD_UMOUNT"
 
 ts_skip_nonroot
+ts_check_losetup
 
 set -o pipefail
 
diff --git a/tests/ts/mount/fstab-uuid b/tests/ts/mount/fstab-uuid
index 5d3afb706..573ed0f59 100755
--- a/tests/ts/mount/fstab-uuid
+++ b/tests/ts/mount/fstab-uuid
@@ -25,6 +25,7 @@ ts_check_test_command "$TS_CMD_MOUNT"
 ts_check_test_command "$TS_CMD_UMOUNT"
 
 ts_skip_nonroot
+ts_check_losetup
 
 set -o pipefail
 
diff --git a/tests/ts/mount/fstab-uuid2devname b/tests/ts/mount/fstab-uuid2devname
index 90f7d9177..5c361c60b 100755
--- a/tests/ts/mount/fstab-uuid2devname
+++ b/tests/ts/mount/fstab-uuid2devname
@@ -25,6 +25,7 @@ ts_check_test_command "$TS_CMD_MOUNT"
 ts_check_test_command "$TS_CMD_UMOUNT"
 
 ts_skip_nonroot
+ts_check_losetup
 
 set -o pipefail
 
diff --git a/tests/ts/mount/fstab-uuid2label b/tests/ts/mount/fstab-uuid2label
index 5291688fc..adceb6dd0 100755
--- a/tests/ts/mount/fstab-uuid2label
+++ b/tests/ts/mount/fstab-uuid2label
@@ -26,6 +26,7 @@ ts_check_test_command "$TS_CMD_MOUNT"
 ts_check_test_command "$TS_CMD_UMOUNT"
 
 ts_skip_nonroot
+ts_check_losetup
 
 set -o pipefail
 
diff --git a/tests/ts/mount/label b/tests/ts/mount/label
index b0e7ca69a..f68035152 100755
--- a/tests/ts/mount/label
+++ b/tests/ts/mount/label
@@ -27,6 +27,7 @@ ts_check_test_command "$TS_CMD_MOUNT"
 ts_check_test_command "$TS_CMD_UMOUNT"
 
 ts_skip_nonroot
+ts_check_losetup
 
 set -o pipefail
 
diff --git a/tests/ts/mount/regfile b/tests/ts/mount/regfile
index 9f24c721a..82f460d0f 100755
--- a/tests/ts/mount/regfile
+++ b/tests/ts/mount/regfile
@@ -13,6 +13,7 @@ ts_check_test_command "$TS_CMD_MOUNT"
 ts_check_test_command "$TS_CMD_UMOUNT"
 
 ts_skip_nonroot
+ts_check_losetup
 
 set -o pipefail
 
diff --git a/tests/ts/mount/remount b/tests/ts/mount/remount
index f983ab37b..b5c323326 100755
--- a/tests/ts/mount/remount
+++ b/tests/ts/mount/remount
@@ -25,6 +25,7 @@ ts_check_test_command "$TS_CMD_MOUNT"
 ts_check_test_command "$TS_CMD_FINDMNT"
 
 ts_skip_nonroot
+ts_check_losetup
 
 # mountpoint
 [ -d $TS_MOUNTPOINT ] || mkdir -p $TS_MOUNTPOINT
diff --git a/tests/ts/mount/rlimit b/tests/ts/mount/rlimit
index 13064c842..c11ab7b42 100755
--- a/tests/ts/mount/rlimit
+++ b/tests/ts/mount/rlimit
@@ -33,6 +33,7 @@ ts_check_test_command "$TS_CMD_MOUNT"
 ts_check_test_command "$TS_CMD_UMOUNT"
 
 ts_skip_nonroot
+ts_check_losetup
 
 [ -L /etc/mtab ] && ts_skip "mtab is symlink"
 [ "$(stat --format '%s' /etc/mtab)" -gt "1024" ] || ts_skip "mtab is too small"
diff --git a/tests/ts/mount/shared-subtree b/tests/ts/mount/shared-subtree
index d512a0007..09d467638 100755
--- a/tests/ts/mount/shared-subtree
+++ b/tests/ts/mount/shared-subtree
@@ -11,6 +11,7 @@ ts_check_test_command "$TS_CMD_UMOUNT"
 ts_check_test_command "$TS_CMD_FINDMNT"
 
 ts_skip_nonroot
+ts_check_losetup
 
 [ -d $TS_MOUNTPOINT ] || mkdir -p $TS_MOUNTPOINT
 
diff --git a/tests/ts/mount/umount-alltargets b/tests/ts/mount/umount-alltargets
index e3b5aec9a..9060524e6 100755
--- a/tests/ts/mount/umount-alltargets
+++ b/tests/ts/mount/umount-alltargets
@@ -17,10 +17,11 @@ ts_skip_nonroot
 $TS_CMD_UMOUNT --help | grep -q all-targets
 [ $? -eq 1 ] && ts_skip "all-targets unsupported"
 
-DEVICE=$(ts_scsi_debug_init dev_size_mb=50)
+# set global variable TS_DEVICE
+ts_scsi_debug_init dev_size_mb=50
 
 ts_log "Create partitions"
-$TS_CMD_FDISK ${DEVICE} &> /dev/null <<EOF
+$TS_CMD_FDISK ${TS_DEVICE} &> /dev/null <<EOF
 n
 p
 1
@@ -47,13 +48,13 @@ EOF
 udevadm settle
 
 ts_log "Create filesystem A"
-mkfs.ext2 ${DEVICE}1 &> /dev/null
+mkfs.ext2 ${TS_DEVICE}1 &> /dev/null
 ts_log "Create filesystem B"
-mkfs.ext2 ${DEVICE}2 &> /dev/null
+mkfs.ext2 ${TS_DEVICE}2 &> /dev/null
 ts_log "Create filesystem C"
-mkfs.ext2 ${DEVICE}3 &> /dev/null
+mkfs.ext2 ${TS_DEVICE}3 &> /dev/null
 ts_log "Create filesystem D"
-mkfs.ext2 ${DEVICE}4 &> /dev/null
+mkfs.ext2 ${TS_DEVICE}4 &> /dev/null
 
 udevadm settle
 
@@ -81,7 +82,7 @@ MOUNTPOINT=$TS_MOUNTPOINT
 # The same device mounted on more places, umount all by mountpoint name
 #
 ts_init_subtest "all-targets-mnt"
-multi_mount ${DEVICE}1 $MOUNTPOINT
+multi_mount ${TS_DEVICE}1 $MOUNTPOINT
 $TS_CMD_UMOUNT --all-targets ${MOUNTPOINT}1 >> $TS_OUTPUT 2>&1
 [ $? == 0 ] || ts_log "umount failed"
 ts_finalize_subtest
@@ -90,8 +91,8 @@ ts_finalize_subtest
 # The same device mounted on more places, umount all by device name
 #
 ts_init_subtest "all-targets-dev"
-multi_mount ${DEVICE}1 $MOUNTPOINT
-$TS_CMD_UMOUNT --all-targets ${DEVICE}1 >> $TS_OUTPUT 2>&1
+multi_mount ${TS_DEVICE}1 $MOUNTPOINT
+$TS_CMD_UMOUNT --all-targets ${TS_DEVICE}1 >> $TS_OUTPUT 2>&1
 [ $? == 0 ] || ts_log "umount failed"
 ts_finalize_subtest
 
@@ -100,14 +101,14 @@ ts_finalize_subtest
 # sub-mounts. Umount all by one umount all by top-level device name.
 #
 ts_init_subtest "all-targets-recursive"
-multi_mount ${DEVICE}1 $MOUNTPOINT
+multi_mount ${TS_DEVICE}1 $MOUNTPOINT
 [ -d "${MOUNTPOINT}1/subA" ] || mkdir -p ${MOUNTPOINT}1/subA
-$TS_CMD_MOUNT ${DEVICE}2 ${MOUNTPOINT}1/subA
+$TS_CMD_MOUNT ${TS_DEVICE}2 ${MOUNTPOINT}1/subA
 [ -d "${MOUNTPOINT}1/subA/subAB" ] || mkdir -p ${MOUNTPOINT}1/subA/subAB
-$TS_CMD_MOUNT ${DEVICE}3 ${MOUNTPOINT}1/subA/subAB
+$TS_CMD_MOUNT ${TS_DEVICE}3 ${MOUNTPOINT}1/subA/subAB
 [ -d "${MOUNTPOINT}1/subB" ] || mkdir -p ${MOUNTPOINT}1/subB
-$TS_CMD_MOUNT ${DEVICE}4 ${MOUNTPOINT}1/subB
-$TS_CMD_UMOUNT --recursive --all-targets ${DEVICE}1 >> $TS_OUTPUT 2>&1
+$TS_CMD_MOUNT ${TS_DEVICE}4 ${MOUNTPOINT}1/subB
+$TS_CMD_UMOUNT --recursive --all-targets ${TS_DEVICE}1 >> $TS_OUTPUT 2>&1
 [ $? == 0 ] || ts_log "umount failed"
 ts_finalize_subtest
 
diff --git a/tests/ts/mount/umount-recursive b/tests/ts/mount/umount-recursive
index d55f61285..f393aed12 100755
--- a/tests/ts/mount/umount-recursive
+++ b/tests/ts/mount/umount-recursive
@@ -18,10 +18,11 @@ $TS_CMD_UMOUNT --help | grep -q recursive
 [ $? -eq 1 ] && ts_skip "recursive unsupported"
 
 ts_log "Init device"
-DEVICE=$(ts_scsi_debug_init dev_size_mb=50)
+# set global variable TS_DEVICE
+ts_scsi_debug_init dev_size_mb=50
 
 ts_log "Create partitions"
-$TS_CMD_FDISK ${DEVICE} &> /dev/null <<EOF
+$TS_CMD_FDISK ${TS_DEVICE} &> /dev/null <<EOF
 n
 p
 1
@@ -48,13 +49,13 @@ EOF
 udevadm settle
 
 ts_log "Create filesystem A"
-mkfs.ext2 ${DEVICE}1 &> /dev/null
+mkfs.ext2 ${TS_DEVICE}1 &> /dev/null
 ts_log "Create filesystem B"
-mkfs.ext2 ${DEVICE}2 &> /dev/null
+mkfs.ext2 ${TS_DEVICE}2 &> /dev/null
 ts_log "Create filesystem C"
-mkfs.ext2 ${DEVICE}3 &> /dev/null
+mkfs.ext2 ${TS_DEVICE}3 &> /dev/null
 ts_log "Create filesystem D"
-mkfs.ext2 ${DEVICE}4 &> /dev/null
+mkfs.ext2 ${TS_DEVICE}4 &> /dev/null
 
 udevadm settle
 
@@ -63,12 +64,12 @@ ts_log "Do tests..."
 [ -d "$TS_MOUNTPOINT" ] || mkdir -p $TS_MOUNTPOINT
 
 ts_log "A) Mount root"
-$TS_CMD_MOUNT ${DEVICE}1 $TS_MOUNTPOINT >> $TS_OUTPUT 2>&1
+$TS_CMD_MOUNT ${TS_DEVICE}1 $TS_MOUNTPOINT >> $TS_OUTPUT 2>&1
 $TS_CMD_MOUNT --make-shared $TS_MOUNTPOINT
 
 ts_log "B) Mount child"
 mkdir -p $TS_MOUNTPOINT/mntB
-$TS_CMD_MOUNT ${DEVICE}2 $TS_MOUNTPOINT/mntB >> $TS_OUTPUT 2>&1
+$TS_CMD_MOUNT ${TS_DEVICE}2 $TS_MOUNTPOINT/mntB >> $TS_OUTPUT 2>&1
 
 ts_log "B2) Mount child-bind"
 mkdir -p $TS_MOUNTPOINT/bindB
@@ -76,10 +77,10 @@ $TS_CMD_MOUNT --bind $TS_MOUNTPOINT/mntB $TS_MOUNTPOINT/bindB >> $TS_OUTPUT 2>&1
 
 ts_log "C) Mount child/child"
 mkdir -p $TS_MOUNTPOINT/mntB/mnt{C,D}
-$TS_CMD_MOUNT ${DEVICE}3 $TS_MOUNTPOINT/mntB/mntC >> $TS_OUTPUT 2>&1
+$TS_CMD_MOUNT ${TS_DEVICE}3 $TS_MOUNTPOINT/mntB/mntC >> $TS_OUTPUT 2>&1
 
 ts_log "D) Mount child/child"
-$TS_CMD_MOUNT ${DEVICE}4 $TS_MOUNTPOINT/mntB/mntD >> $TS_OUTPUT 2>&1
+$TS_CMD_MOUNT ${TS_DEVICE}4 $TS_MOUNTPOINT/mntB/mntD >> $TS_OUTPUT 2>&1
 
 ts_log "E) Mount child-bind"
 mkdir -p $TS_MOUNTPOINT/bindC
diff --git a/tests/ts/mount/uuid b/tests/ts/mount/uuid
index 0233064cf..5b0c90dcc 100755
--- a/tests/ts/mount/uuid
+++ b/tests/ts/mount/uuid
@@ -25,6 +25,7 @@ ts_check_test_command "$TS_CMD_MOUNT"
 ts_check_test_command "$TS_CMD_UMOUNT"
 
 ts_skip_nonroot
+ts_check_losetup
 
 set -o pipefail
 
diff --git a/tests/ts/partx/partx b/tests/ts/partx/partx
index bc612b0a4..ed6d0e184 100755
--- a/tests/ts/partx/partx
+++ b/tests/ts/partx/partx
@@ -44,94 +44,95 @@ for img in $(ls $TS_IMGDIR/*.img.bz2 | sort); do
 	ts_finalize_subtest
 done
 
-
-DEVICE=$(ts_scsi_debug_init dev_size_mb=50)
+# set global variable TS_DEVICE
+ts_scsi_debug_init dev_size_mb=50
 
 ts_init_subtest "addpart"
-$TS_CMD_ADDPART ${DEVICE} 1 0 1
+$TS_CMD_ADDPART ${TS_DEVICE} 1 0 1
 [ "$?" == 0 ] && echo OK &>$TS_OUTPUT || ts_die "Unable to add partition"a &>$TS_OUTPUT
 ts_finalize_subtest
 
 udevadm settle
 
 ts_init_subtest "delpart"
-$TS_CMD_DELPART ${DEVICE} 1
+$TS_CMD_DELPART ${TS_DEVICE} 1
 [ "$?" == 0 ] && echo OK >> $TS_OUTPUT 2>&1 || ts_die "Unable to remove partition" >> $TS_OUTPUT 2>&1
 ts_finalize_subtest
 
 udevadm settle
 rmmod scsi_debug &> /dev/null
 
-DEVICE=$(ts_scsi_debug_init dev_size_mb=50 num_parts=$PARTS)
-DEVNAME=$(basename $DEVICE)
+# set global variable TS_DEVICE
+ts_scsi_debug_init dev_size_mb=50 num_parts=$PARTS
+DEVNAME=$(basename $TS_DEVICE)
 
 ts_init_subtest "detect-parts"
-$TS_CMD_PARTX --show $DEVICE &> $TS_OUTPUT
+$TS_CMD_PARTX --show $TS_DEVICE &> $TS_OUTPUT
 ts_finalize_subtest
 
 udevadm settle
 
 ts_init_subtest "delete-all"
 #delete partinfo
-$TS_CMD_PARTX --delete $DEVICE &> $TS_OUTPUT
+$TS_CMD_PARTX --delete $TS_DEVICE &> $TS_OUTPUT
 [ $? -eq 0 ] && echo "partitions deleted" &> $TS_OUTPUT ||
-    echo "Unable to delete partitions on $DEVICE" &> $TS_OUTPUT
+    echo "Unable to delete partitions on $TS_DEVICE" &> $TS_OUTPUT
 ls -d "/sys/block/${DEVNAME}/${DEVNAME}*" 2>/dev/null && ts_die
 ts_finalize_subtest
 
 udevadm settle
 
 ts_init_subtest "add-all"
-#read DEVICE and restore the partinfo
-$TS_CMD_PARTX --add $DEVICE &> $TS_OUTPUT
+#read TS_DEVICE and restore the partinfo
+$TS_CMD_PARTX --add $TS_DEVICE &> $TS_OUTPUT
 [ $(ls -d /sys/block/${DEVNAME}/${DEVNAME}* 2>/dev/null | wc -l) -eq $PARTS ] &&
    echo "partitions added" >> $TS_OUTPUT 2>&1  ||
-   echo "Unable to add partitions for $DEVICE" >> $TS_OUTPUT 2>&1
+   echo "Unable to add partitions for $TS_DEVICE" >> $TS_OUTPUT 2>&1
 ts_finalize_subtest
 
 udevadm settle
 
 ts_init_subtest "update-one"
-#read DEVICE and update second partition
-$TS_CMD_PARTX --update ${DEVICE}2 &> $TS_OUTPUT
+#read TS_DEVICE and update second partition
+$TS_CMD_PARTX --update ${TS_DEVICE}2 &> $TS_OUTPUT
 [ $(ls -d /sys/block/${DEVNAME}/${DEVNAME}* 2>/dev/null | wc -l) -eq $PARTS ] &&
    echo "partitions updated" >> $TS_OUTPUT 2>&1  ||
-   echo "Unable to update 2nd partition for $DEVICE" >> $TS_OUTPUT 2>&1
+   echo "Unable to update 2nd partition for $TS_DEVICE" >> $TS_OUTPUT 2>&1
 ts_finalize_subtest
 
 udevadm settle
 
 ts_init_subtest "delete-one"
 #remove last partition only
-$TS_CMD_PARTX -d --nr -1 $DEVICE >> $TS_OUTPUT 2>&1
+$TS_CMD_PARTX -d --nr -1 $TS_DEVICE >> $TS_OUTPUT 2>&1
 [ $(ls -d /sys/block/${DEVNAME}/${DEVNAME}* 2>/dev/null |
 wc -l) -eq $((PARTS-1)) ] &&
     echo "last partition removed" >> $TS_OUTPUT 2>&1 ||
-    echo "Unable to remove a partition on $DEVICE" >> $TS_OUTPUT 2>&1
+    echo "Unable to remove a partition on $TS_DEVICE" >> $TS_OUTPUT 2>&1
 ts_finalize_subtest
 
 udevadm settle
 
 ts_init_subtest "delete-non-existent"
 #attempt to remove it again
-$TS_CMD_PARTX -d $PARTS $DEVICE && echo "partx failed: removed non-existing partition" &>$TS_OUTPUT || echo "partx: OK" &>$TS_OUTPUT
+$TS_CMD_PARTX -d $PARTS $TS_DEVICE && echo "partx failed: removed non-existing partition" &>$TS_OUTPUT || echo "partx: OK" &>$TS_OUTPUT
 ts_finalize_subtest
 
 udevadm settle
 
 ts_init_subtest "add-existing"
 #try adding an existing partition
-$TS_CMD_PARTX -a --nr 1 $DEVICE &>/dev/null && echo "partx failed: re-added an existing partition" &> $TS_OUTPUT || echo "partx: OK" &> $TS_OUTPUT
+$TS_CMD_PARTX -a --nr 1 $TS_DEVICE &>/dev/null && echo "partx failed: re-added an existing partition" &> $TS_OUTPUT || echo "partx: OK" &> $TS_OUTPUT
 ts_finalize_subtest
 
 udevadm settle
 
 ts_init_subtest "change-by-range"
 # {-a|-d} --nr 0 should handle all partitions
-$TS_CMD_PARTX -d --nr 0 $DEVICE
-ls -d /sys/block/${DEVNAME}/${DEVNAME}* 2>/dev/null && echo "Unable to delete partitions on $DEVICE" >> $TS_OUTPUT 2>&1 || echo "partitions deleted" >> $TS_OUTPUT 2>&1
-$TS_CMD_PARTX -a --nr 0 $DEVICE
-[ $(ls -d /sys/block/${DEVNAME}/${DEVNAME}* 2>/dev/null | wc -l) -eq $PARTS ] && echo "partitions added" >> $TS_OUTPUT 2>&1 || echo "Failed to add $DEVICE partitions" >> $TS_OUTPUT 2>&1
+$TS_CMD_PARTX -d --nr 0 $TS_DEVICE
+ls -d /sys/block/${DEVNAME}/${DEVNAME}* 2>/dev/null && echo "Unable to delete partitions on $TS_DEVICE" >> $TS_OUTPUT 2>&1 || echo "partitions deleted" >> $TS_OUTPUT 2>&1
+$TS_CMD_PARTX -a --nr 0 $TS_DEVICE
+[ $(ls -d /sys/block/${DEVNAME}/${DEVNAME}* 2>/dev/null | wc -l) -eq $PARTS ] && echo "partitions added" >> $TS_OUTPUT 2>&1 || echo "Failed to add $TS_DEVICE partitions" >> $TS_OUTPUT 2>&1
 ts_finalize_subtest
 
 udevadm settle
diff --git a/tests/ts/swapon/devname b/tests/ts/swapon/devname
index f8f312105..934455df3 100755
--- a/tests/ts/swapon/devname
+++ b/tests/ts/swapon/devname
@@ -26,6 +26,7 @@ ts_check_test_command "$TS_CMD_SWAPON"
 ts_check_test_command "$TS_CMD_SWAPOFF"
 
 ts_skip_nonroot
+ts_check_losetup
 
 set -o pipefail
 
diff --git a/tests/ts/swapon/fixpgsz b/tests/ts/swapon/fixpgsz
index f0dafe934..8296951ec 100755
--- a/tests/ts/swapon/fixpgsz
+++ b/tests/ts/swapon/fixpgsz
@@ -11,6 +11,7 @@ ts_check_test_command "$TS_CMD_SWAPON"
 ts_check_test_command "$TS_CMD_SWAPOFF"
 
 ts_skip_nonroot
+ts_check_losetup
 
 set -o pipefail
 
diff --git a/tests/ts/swapon/fixsig b/tests/ts/swapon/fixsig
index a4d04110c..c1b4cb6c2 100755
--- a/tests/ts/swapon/fixsig
+++ b/tests/ts/swapon/fixsig
@@ -11,6 +11,7 @@ ts_check_test_command "$TS_CMD_SWAPON"
 ts_check_test_command "$TS_CMD_SWAPOFF"
 
 ts_skip_nonroot
+ts_check_losetup
 
 set -o pipefail
 
diff --git a/tests/ts/swapon/label b/tests/ts/swapon/label
index 03cf017ed..329b1af08 100755
--- a/tests/ts/swapon/label
+++ b/tests/ts/swapon/label
@@ -27,6 +27,7 @@ ts_check_test_command "$TS_CMD_SWAPON"
 ts_check_test_command "$TS_CMD_SWAPOFF"
 
 ts_skip_nonroot
+ts_check_losetup
 
 set -o pipefail
 
diff --git a/tests/ts/swapon/uuid b/tests/ts/swapon/uuid
index c80e52fdb..2ea493184 100755
--- a/tests/ts/swapon/uuid
+++ b/tests/ts/swapon/uuid
@@ -26,6 +26,7 @@ ts_check_test_command "$TS_CMD_SWAPON"
 ts_check_test_command "$TS_CMD_SWAPOFF"
 
 ts_skip_nonroot
+ts_check_losetup
 
 set -o pipefail
 
diff --git a/tests/ts/wipefs/wipefs b/tests/ts/wipefs/wipefs
index 4bd174800..f921625c5 100755
--- a/tests/ts/wipefs/wipefs
+++ b/tests/ts/wipefs/wipefs
@@ -9,21 +9,22 @@ ts_init "$*"
 
 ts_check_test_command "$TS_CMD_WIPEFS"
 
-DEVICE=$(ts_scsi_debug_init dev_size_mb=50 num_parts=2)
+# set global variable TS_DEVICE
+ts_scsi_debug_init dev_size_mb=50 num_parts=2
 
 # remove old backups
-rm -rf $HOME/wipefs-$(basename ${DEVICE})-*.bak
+rm -rf $HOME/wipefs-$(basename ${TS_DEVICE})-*.bak
 
 #remove the magic byte, back it up
-$TS_CMD_WIPEFS --all --backup ${DEVICE} &>/dev/null || ts_die "wipefs failed"
+$TS_CMD_WIPEFS --all --backup ${TS_DEVICE} &>/dev/null || ts_die "wipefs failed"
 
 #there should be just one magic string/backup file in this case
-INFILE=$(ls $HOME/wipefs-$(basename ${DEVICE})-*.bak)
+INFILE=$(ls $HOME/wipefs-$(basename ${TS_DEVICE})-*.bak)
 OFFT=$(echo $INFILE | sed -E 's/^.*-(.*).bak$/\1/')
-dd if=$INFILE of=$DEVICE bs=1 conv=notrunc seek=$(($OFFT)) &>/dev/null
+dd if=$INFILE of=$TS_DEVICE bs=1 conv=notrunc seek=$(($OFFT)) &>/dev/null
 
 #the bytes should be copied back, check if wipefs can recognize it
-$TS_CMD_WIPEFS -a ${DEVICE} > $TS_OUTDIR/out 2>/dev/null
+$TS_CMD_WIPEFS -a ${TS_DEVICE} > $TS_OUTDIR/out 2>/dev/null
 
 # check for output
 [ -s $TS_OUTDIR/out ] && echo "OK" &> $TS_OUTPUT || exit 1