[qemu-xen stable-4.13] iotests: Add peek_file* functions

[patchbot@xxxxxxx]

commit b156178553341ab24dcc14efdb7b681375099462
Author:     Max Reitz <mreitz@xxxxxxxxxx>
AuthorDate: Fri Oct 11 17:28:13 2019 +0200
Commit:     Michael Roth <mdroth@xxxxxxxxxxxxxxxxxx>
CommitDate: Tue Nov 12 11:59:33 2019 -0600

    iotests: Add peek_file* functions
    
    Signed-off-by: Max Reitz <mreitz@xxxxxxxxxx>
    Reviewed-by: Eric Blake <eblake@xxxxxxxxxx>
    Message-id: 20191011152814.14791-16-mreitz@xxxxxxxxxx
    Signed-off-by: Max Reitz <mreitz@xxxxxxxxxx>
    (cherry picked from commit fc8ba423ca6b37bee56ec9dc339b44043c39553d)
    *prereq for 570542ec
    Signed-off-by: Michael Roth <mdroth@xxxxxxxxxxxxxxxxxx>
---
 tests/qemu-iotests/common.rc | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/tests/qemu-iotests/common.rc b/tests/qemu-iotests/common.rc
index 5502c3da2f..78decfd5d5 100644
--- a/tests/qemu-iotests/common.rc
+++ b/tests/qemu-iotests/common.rc
@@ -53,6 +53,26 @@ poke_file()
     printf "$3" | dd "of=$1" bs=1 "seek=$2" conv=notrunc &>/dev/null
 }
 
+# peek_file_le 'test.img' 512 2 => 65534
+peek_file_le()
+{
+    # Wrap in echo $() to strip spaces
+    echo $(od -j"$2" -N"$3" --endian=little -An -vtu"$3" "$1")
+}
+
+# peek_file_be 'test.img' 512 2 => 65279
+peek_file_be()
+{
+    # Wrap in echo $() to strip spaces
+    echo $(od -j"$2" -N"$3" --endian=big -An -vtu"$3" "$1")
+}
+
+# peek_file_raw 'test.img' 512 2 => '\xff\xfe'
+peek_file_raw()
+{
+    dd if="$1" bs=1 skip="$2" count="$3" status=none
+}
+
 
 if ! . ./common.config
     then
--
generated by git-patchbot for /home/xen/git/qemu-xen.git#stable-4.13