提交 c6decabc 编写于 作者: E Eric Blake 提交者: Michael Roth

iotests: Fix nonportable use of od --endian

Tests 261 and 272 fail on RHEL 7 with coreutils 8.22, since od
--endian was not added until coreutils 8.23.  Fix this by manually
constructing the final value one byte at a time.

Fixes: fc8ba423Reported-by: NAndrey Shinkevich <andrey.shinkevich@virtuozzo.com>
Signed-off-by: NEric Blake <eblake@redhat.com>
Reviewed-by: NMax Reitz <mreitz@redhat.com>
Message-Id: <20200226125424.481840-1-eblake@redhat.com>
Signed-off-by: NMax Reitz <mreitz@redhat.com>
(cherry picked from commit 69135eb3)
Signed-off-by: NMichael Roth <mdroth@linux.vnet.ibm.com>
上级 580c08b3
......@@ -56,18 +56,30 @@ poke_file()
# 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")
local val=0 shift=0 byte
# coreutils' od --endian is not portable, so manually assemble bytes.
for byte in $(od -j"$2" -N"$3" -An -v -tu1 "$1"); do
val=$(( val | (byte << shift) ))
shift=$((shift + 8))
done
printf %llu $val
}
# 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")
local val=0 byte
# coreutils' od --endian is not portable, so manually assemble bytes.
for byte in $(od -j"$2" -N"$3" -An -v -tu1 "$1"); do
val=$(( (val << 8) | byte ))
done
printf %llu $val
}
# peek_file_raw 'test.img' 512 2 => '\xff\xfe'
# peek_file_raw 'test.img' 512 2 => '\xff\xfe'. Do not use if the raw data
# is likely to contain \0 or trailing \n.
peek_file_raw()
{
dd if="$1" bs=1 skip="$2" count="$3" status=none
......
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