aboutsummaryrefslogtreecommitdiff
path: root/tests/qemu-iotests
diff options
context:
space:
mode:
authorMax Reitz <mreitz@redhat.com>2020-03-24 18:27:56 +0100
committerMax Reitz <mreitz@redhat.com>2020-03-26 14:52:37 +0100
commit2f8bb28ff0123a4e84bd14facc541dd2159580c2 (patch)
tree3a72bbd33c543036fd7a47feeb4d1e7befc3c376 /tests/qemu-iotests
parent1656324ec0d1a9466160a5c5065b9bf11e6ea91b (diff)
iotests: Add poke_file_[bl]e functions
Similarly to peek_file_[bl]e, we may want to write binary integers into a file. Currently, this often means messing around with poke_file and raw binary strings. I hope these functions make it a bit more comfortable. Signed-off-by: Max Reitz <mreitz@redhat.com> Code-suggested-by: Eric Blake <eblake@redhat.com> Message-Id: <20200324172757.1173824-3-mreitz@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Max Reitz <mreitz@redhat.com>
Diffstat (limited to 'tests/qemu-iotests')
-rw-r--r--tests/qemu-iotests/common.rc24
1 files changed, 24 insertions, 0 deletions
diff --git a/tests/qemu-iotests/common.rc b/tests/qemu-iotests/common.rc
index 4c246c0450..bf3b9fdea0 100644
--- a/tests/qemu-iotests/common.rc
+++ b/tests/qemu-iotests/common.rc
@@ -53,6 +53,30 @@ poke_file()
printf "$3" | dd "of=$1" bs=1 "seek=$2" conv=notrunc &>/dev/null
}
+# poke_file_le $img_filename $offset $byte_width $value
+# Example: poke_file_le "$TEST_IMG" 512 2 65534
+poke_file_le()
+{
+ local img=$1 ofs=$2 len=$3 val=$4 str=''
+
+ while ((len--)); do
+ str+=$(printf '\\x%02x' $((val & 0xff)))
+ val=$((val >> 8))
+ done
+
+ poke_file "$img" "$ofs" "$str"
+}
+
+# poke_file_be $img_filename $offset $byte_width $value
+# Example: poke_file_be "$TEST_IMG" 512 2 65279
+poke_file_be()
+{
+ local img=$1 ofs=$2 len=$3 val=$4
+ local str=$(printf "%0$((len * 2))x\n" $val | sed 's/\(..\)/\\x\1/g')
+
+ poke_file "$img" "$ofs" "$str"
+}
+
# peek_file_le 'test.img' 512 2 => 65534
peek_file_le()
{