[PATCH] ext4/048: add check for od endian flag

[Leah Rumancik <leah.rumancik@gmail.com>]

From: Leah Rumancik <lrumancik@google.com>

od --endian=little is used to read bytes in little endian when on a
big endian machine. Update test ext4/048 to require od endian flag
support on big endian machines, otherwise, skip test.

Signed-off-by: Leah Rumancik <leah.rumancik@gmail.com>
---
 common/rc      |  6 ++++++
 tests/ext4/048 | 13 ++++++++++++-
 2 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/common/rc b/common/rc
index a0aa7300..70aa7176 100644
--- a/common/rc
+++ b/common/rc
@@ -4582,6 +4582,12 @@ _getcap()
 	return ${PIPESTATUS[0]}
 }
 
+_require_od_endian_flag()
+{
+	od --endian=little < /dev/null > /dev/null 2>&1 || \
+		_notrun "od does not support endian flag"
+}
+
 init_rc
 
 ################################################################################
diff --git a/tests/ext4/048 b/tests/ext4/048
index 35d3ece8..51189618 100755
--- a/tests/ext4/048
+++ b/tests/ext4/048
@@ -26,6 +26,11 @@ _supported_fs ext4
 _require_scratch
 _require_command "$DEBUGFS_PROG" debugfs
 
+big_endian=$(echo -ne '\x11' | od -tx2 | head -1 | cut -f2 -d' ' | cut -c1)
+if (( big_endian )); then
+	_require_od_endian_flag
+fi
+
 testdir="${SCRATCH_MNT}/testdir"
 
 # get block number filename's dir ent
@@ -44,7 +49,13 @@ get_offset() {
 # argument 1: block
 # argument 2: offset
 get_reclen() {
-	echo $(od $SCRATCH_DEV --skip-bytes=$(($1 * $blocksize + $2 + 4)) --read-bytes=2  -d -An  --endian=little | tr -d ' \t\n\r')
+	if (( big_endian )); then
+		echo $(od $SCRATCH_DEV --skip-bytes=$(($1 * $blocksize + $2 + 4)) --read-bytes=2  -d -An  --endian=little | \
+			tr -d ' \t\n\r')
+	else
+		echo $(od $SCRATCH_DEV --skip-bytes=$(($1 * $blocksize + $2 + 4)) --read-bytes=2  -d -An | \
+			tr -d ' \t\n\r')
+	fi
 }
 
 # reads portion of dirent that should be zero'd out (starting at offset of name_len = 6)
-- 
2.32.0.rc1.229.g3e70b5a671-goog