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iotests: Add peek_file* functions

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Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-id: 20191011152814.14791-16-mreitz@redhat.com
Signed-off-by: Max Reitz <mreitz@redhat.com>
This commit is contained in:
Max Reitz 2019-10-11 17:28:13 +02:00
parent e40e6e88f6
commit fc8ba423ca
1 changed files with 20 additions and 0 deletions
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20
tests/qemu-iotests/common.rc
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@ -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