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jforbes pushed a commit to branch master
in repository kernel-tests.
commit 0ca76cd70357cfca0aece9594f3168d9f945f154
Author: Josh Boyer <jwboyer@xxxxxxxxxx>
Date: Wed May 29 13:08:15 2013 -0400
Add some utility functions to create and mount loopback filesystems
---
utils/loopback.sh | 50 ++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 50 insertions(+)
diff --git a/utils/loopback.sh b/utils/loopback.sh
new file mode 100644
index 0000000..3179c43
--- /dev/null
+++ b/utils/loopback.sh
@@ -0,0 +1,50 @@
+#!/bin/bash
+
+create_sparse_file() {
+ dd if=/dev/zero of=$1 bs=1 count=0 seek=$2M ;
+ return $?
+}
+
+create_fs() {
+ loopdev=`losetup --find --show $2`;
+ echo $loopdev
+ mkfs -t $1 $loopdev ;
+ losetup --detach $loopdev
+ return $?
+}
+
+mount_image() {
+ mount -t $1 -o loop $2 $3 ;
+ return $?
+}
+
+loopback_fs() {
+ file=$1;
+ size=$2;
+ fs=$3;
+ mountpoint=$4;
+
+ create_sparse_file $file $size;
+ rc=$?
+ if [ $rc -ne 0 ]
+ then
+ echo "Could not create spare file $file"
+ return 3
+ fi
+
+ create_fs $fs $file
+ if [ $rc -ne 0 ]
+ then
+ echo "Could not create $fs on $file"
+ return 3
+ fi
+
+ mount_image $fs $file $mountpoint
+ if [ $rc -ne 0 ]
+ then
+ echo "Could not mount $fs filesystem on $file at $mountpoint"
+ return 3
+ fi
+
+ return 0
+}
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