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-rwxr-xr-xhelpers/lh_losetup10
1 files changed, 8 insertions, 2 deletions
diff --git a/helpers/lh_losetup b/helpers/lh_losetup
index e2b3c0d10..442afdb87 100755
--- a/helpers/lh_losetup
+++ b/helpers/lh_losetup
@@ -2,7 +2,13 @@
# lh_losetup <device> <file> <partition>
-DEVICE="${1}"
+if [ -z "${1}" ]
+then
+ DEVICE="`losetup -f`"
+else
+ DEVICE="${1}"
+fi
+
FILE="${2}"
PARTITION="${3}"
@@ -11,7 +17,7 @@ FDISK_OUT="`fdisk -l -u ${DEVICE} 2>&1`"
losetup -d "${DEVICE}"
LOOPDEVICE="`echo ${DEVICE}p${PARTITION:=1}`"
-CYL="`echo ${FDISK_OUT} | sed -ne "s_^${LOOPDEVICE}[ *]*\([0-9]*\).*_\1_p" `"
+CYL=`echo "$FDISK_OUT" | sed -ne "s_^$LOOPDEVICE[ *]*\([0-9]*\).*_\1_p"`
#OFFSET="`expr 512 '*' ${CYL}`"
OFFSET="$((CYL*512))"