From: Leah Rumancik <lrumancik@google.com>
Date: Mon, 7 Jun 2021 21:36:38 +0000 (+0000)
Subject: ext4/048: add check for od endian flag
X-Git-Tag: v2022.05.01~372
X-Git-Url: http://git.apps.os.sepia.ceph.com/?p=xfstests-dev.git;a=commitdiff_plain;h=9ff5f0ccac24fb2b37272f8f6efae920104ecee8

ext4/048: add check for od endian flag

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>
Reviewed-by: Yang Xu <xuyang2018.jy@fujitsu.com>
Signed-off-by: Eryu Guan <guaneryu@gmail.com>
---

diff --git a/common/rc b/common/rc
index 4efd4364..d4ad421e 100644
--- a/common/rc
+++ b/common/rc
@@ -4593,6 +4593,12 @@ _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)