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Date: Thu, 16 Jan 2025 15:27:00 -0800
Subject: [PATCH 07/23] common/rc: create a wrapper for the su command
From: "Darrick J. Wong" <djwong@kernel.org>
To: zlang@redhat.com, djwong@kernel.org
Cc: hch@lst.de, fstests@vger.kernel.org, linux-xfs@vger.kernel.org
Message-ID: <173706974182.1927324.17074300255490410988.stgit@frogsfrogsfrogs>
In-Reply-To: <173706974044.1927324.7824600141282028094.stgit@frogsfrogsfrogs>
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From: Darrick J. Wong <djwong@kernel.org>

Create a _su wrapper around the su command so that the next patch can
fix all the pkill isolation code so that this test can only kill
processes started for this test.

Signed-off-by: "Darrick J. Wong" <djwong@kernel.org>
---
 common/rc         |    9 +++++++--
 tests/generic/093 |    2 +-
 tests/generic/125 |    2 +-
 tests/generic/128 |    2 +-
 tests/generic/193 |   36 ++++++++++++++++++------------------
 tests/generic/230 |   14 +++++++-------
 tests/generic/231 |    2 +-
 tests/generic/233 |    2 +-
 tests/generic/270 |    4 ++--
 tests/generic/314 |    2 +-
 tests/generic/327 |    2 +-
 tests/generic/328 |    4 ++--
 tests/generic/355 |    2 +-
 tests/generic/453 |    6 +++---
 tests/generic/514 |    2 +-
 tests/generic/573 |    2 +-
 tests/generic/600 |    2 +-
 tests/generic/601 |    2 +-
 tests/generic/603 |   10 +++++-----
 tests/generic/673 |    2 +-
 tests/generic/674 |    2 +-
 tests/generic/675 |    2 +-
 tests/generic/680 |    2 +-
 tests/generic/681 |    2 +-
 tests/generic/682 |    2 +-
 tests/generic/683 |    2 +-
 tests/generic/684 |    2 +-
 tests/generic/685 |    2 +-
 tests/generic/686 |    2 +-
 tests/generic/687 |    2 +-
 tests/generic/688 |    2 +-
 tests/generic/691 |    8 ++++----
 tests/generic/721 |   10 +++++-----
 tests/generic/726 |    2 +-
 tests/generic/727 |    2 +-
 tests/xfs/720     |    2 +-
 tests/xfs/795     |    2 +-
 tests/xfs/803     |    2 +-
 38 files changed, 82 insertions(+), 77 deletions(-)

diff --git a/common/rc b/common/rc
index c5421c9454fa62..459be11c11c405 100644
--- a/common/rc
+++ b/common/rc
@@ -2740,6 +2740,11 @@ _require_user_exists()
 	[ "$?" == "0" ] || _notrun "$user user not defined."
 }
 
+_su()
+{
+	su "$@"
+}
+
 # check if a user exists and is able to execute commands.
 # Uses 'fsgqa' user as default.
 #
@@ -2750,7 +2755,7 @@ _require_user()
 		qa_user=$1
 	fi
 	_require_user_exists $qa_user
-	echo /bin/true | su $qa_user
+	echo /bin/true | _su $qa_user
 	[ "$?" == "0" ] || _notrun "$qa_user cannot execute commands."
 }
 
@@ -2812,7 +2817,7 @@ s,^\s*$,,;
 
 _user_do()
 {
-	echo $1 | su -s /bin/bash $qa_user 2>&1 | _filter_user_do
+	echo $1 | _su -s /bin/bash $qa_user 2>&1 | _filter_user_do
 }
 
 _require_xfs_io_command()
diff --git a/tests/generic/093 b/tests/generic/093
index c4e866da1c18eb..047cc821e0e608 100755
--- a/tests/generic/093
+++ b/tests/generic/093
@@ -62,7 +62,7 @@ chmod ugo+w $TEST_DIR
 # don't use $here/src/writemod, as we're running it as a regular user, and
 # $here may contain path component that a regular user doesn't have search
 # permission
-su $qa_user -c "src/writemod $file" | filefilter
+_su $qa_user -c "src/writemod $file" | filefilter
 cat $file
 
 # success, all done
diff --git a/tests/generic/125 b/tests/generic/125
index e2bc5fa125da6e..011a51e8fa21c2 100755
--- a/tests/generic/125
+++ b/tests/generic/125
@@ -32,7 +32,7 @@ chmod a+rw $TESTFILE
 
 # don't use $here/src/ftrunc, as we're running it as a regular user, and $here
 # may contain path component that a regular user doesn't have search permission
-su $qa_user -c "./src/ftrunc -f $TESTFILE"
+_su $qa_user -c "./src/ftrunc -f $TESTFILE"
 
 if [ "$?" != "0" ];  then
     echo src/ftrunc returned non 0 status!
diff --git a/tests/generic/128 b/tests/generic/128
index f931ca0639687b..5a497cdea7382b 100755
--- a/tests/generic/128
+++ b/tests/generic/128
@@ -26,7 +26,7 @@ cp "$(type -P ls)" $SCRATCH_MNT
 chmod 700 $SCRATCH_MNT/nosuid
 chmod 4755 $SCRATCH_MNT/ls
 
-su -s/bin/bash - $qa_user -c "$SCRATCH_MNT/ls $SCRATCH_MNT/nosuid >/dev/null 2>&1"
+_su -s/bin/bash - $qa_user -c "$SCRATCH_MNT/ls $SCRATCH_MNT/nosuid >/dev/null 2>&1"
 if [ $? -eq 0 ] ; then
 	echo "Error: we shouldn't be able to ls the directory"
 fi
diff --git a/tests/generic/193 b/tests/generic/193
index d251d3a5c4f8ee..ba557428f77b9c 100755
--- a/tests/generic/193
+++ b/tests/generic/193
@@ -69,17 +69,17 @@ echo
 _create_files
 
 echo "user: chown root owned file to qa_user (should fail)"
-su ${qa_user} -c "chown ${qa_user} $test_root" 2>&1 | _filter_files
+_su ${qa_user} -c "chown ${qa_user} $test_root" 2>&1 | _filter_files
 
 echo "user: chown root owned file to root (should fail)"
-su ${qa_user} -c "chown root $test_root" 2>&1 | _filter_files
+_su ${qa_user} -c "chown root $test_root" 2>&1 | _filter_files
 
 echo "user: chown qa_user owned file to qa_user (should succeed)"
-su ${qa_user} -c "chown ${qa_user} $test_user"
+_su ${qa_user} -c "chown ${qa_user} $test_user"
 
 # this would work without _POSIX_CHOWN_RESTRICTED
 echo "user: chown qa_user owned file to root (should fail)"
-su ${qa_user} -c "chown root $test_user" 2>&1 | _filter_files
+_su ${qa_user} -c "chown root $test_user" 2>&1 | _filter_files
 
 _cleanup_files
 
@@ -93,19 +93,19 @@ echo
 _create_files
 
 echo "user: chgrp root owned file to root (should fail)"
-su ${qa_user} -c "chgrp root $test_root" 2>&1 | _filter_files
+_su ${qa_user} -c "chgrp root $test_root" 2>&1 | _filter_files
 
 echo "user: chgrp qa_user owned file to root (should fail)"
-su ${qa_user} -c "chgrp root $test_user" 2>&1 | _filter_files
+_su ${qa_user} -c "chgrp root $test_user" 2>&1 | _filter_files
 
 echo "user: chgrp root owned file to qa_user (should fail)"
-su ${qa_user} -c "chgrp ${qa_user} $test_root" 2>&1 | _filter_files
+_su ${qa_user} -c "chgrp ${qa_user} $test_root" 2>&1 | _filter_files
 
 echo "user: chgrp qa_user owned file to qa_user (should succeed)"
-su ${qa_user} -c "chgrp ${qa_user} $test_user"
+_su ${qa_user} -c "chgrp ${qa_user} $test_user"
 
 #echo "user: chgrp qa_user owned file to secondary group (should succeed)"
-#su ${qa_user} -c "chgrp ${group2} $test_user"
+#_su ${qa_user} -c "chgrp ${group2} $test_user"
 
 _cleanup_files
 
@@ -119,10 +119,10 @@ echo
 _create_files
 
 echo "user: chmod a+r on qa_user owned file (should succeed)"
-su ${qa_user} -c "chmod a+r $test_user"
+_su ${qa_user} -c "chmod a+r $test_user"
 
 echo "user: chmod a+r on root owned file (should fail)"
-su ${qa_user} -c "chmod a+r $test_root" 2>&1 | _filter_files
+_su ${qa_user} -c "chmod a+r $test_root" 2>&1 | _filter_files
 
 #
 # Setup a file owned by the qa_user, but with a group ID that
@@ -143,7 +143,7 @@ chown ${qa_user}:root $test_user
 chmod g+s $test_user
 
 # and let the qa_user change permission bits
-su ${qa_user} -c "chmod a+w $test_user"
+_su ${qa_user} -c "chmod a+w $test_user"
 stat -c '%A' $test_user
 
 #
@@ -220,7 +220,7 @@ echo "with no exec perm"
 echo frobnozzle >> $test_user
 chmod ug+s $test_user
 echo -n "before: "; stat -c '%A' $test_user
-su ${qa_user} -c "echo > $test_user"
+_su ${qa_user} -c "echo > $test_user"
 echo -n "after:  "; stat -c '%A' $test_user
 
 echo "with user exec perm"
@@ -228,7 +228,7 @@ echo frobnozzle >> $test_user
 chmod ug+s $test_user
 chmod u+x $test_user
 echo -n "before: "; stat -c '%A' $test_user
-su ${qa_user} -c "echo > $test_user"
+_su ${qa_user} -c "echo > $test_user"
 echo -n "after:  "; stat -c '%A' $test_user
 
 echo "with group exec perm"
@@ -237,7 +237,7 @@ chmod ug+s $test_user
 chmod g+x $test_user
 chmod u-x $test_user
 echo -n "before: "; stat -c '%A' $test_user
-su ${qa_user} -c "echo > $test_user"
+_su ${qa_user} -c "echo > $test_user"
 echo -n "after:  "; stat -c '%A' $test_user
 
 echo "with user+group exec perm"
@@ -245,7 +245,7 @@ echo frobnozzle >> $test_user
 chmod ug+s $test_user
 chmod ug+x $test_user
 echo -n "before: "; stat -c '%A' $test_user
-su ${qa_user} -c "echo > $test_user"
+_su ${qa_user} -c "echo > $test_user"
 echo -n "after:  "; stat -c '%A' $test_user
 
 #
@@ -258,10 +258,10 @@ echo
 _create_files
 
 echo "user: touch qa_user file (should succeed)"
-su ${qa_user} -c "touch $test_user"
+_su ${qa_user} -c "touch $test_user"
 
 echo "user: touch root file (should fail)"
-su ${qa_user} -c "touch $test_root" 2>&1 | _filter_files
+_su ${qa_user} -c "touch $test_root" 2>&1 | _filter_files
 
 _cleanup_files
 
diff --git a/tests/generic/230 b/tests/generic/230
index ba95fbe725ad28..18e20f4b2e9439 100755
--- a/tests/generic/230
+++ b/tests/generic/230
@@ -33,13 +33,13 @@ test_enforcement()
 	echo "--- initiating IO..." >>$seqres.full
 	# Firstly fit below block soft limit
 	echo "Write 225 blocks..."
-	su $qa_user -c "$XFS_IO_PROG -c 'pwrite 0 $((225 * $BLOCK_SIZE))' -c fsync \
+	_su $qa_user -c "$XFS_IO_PROG -c 'pwrite 0 $((225 * $BLOCK_SIZE))' -c fsync \
 		$SCRATCH_MNT/file1" 2>&1 >>$seqres.full | \
 		_filter_xfs_io_error | tee -a $seqres.full
 	repquota -$type $SCRATCH_MNT  | grep -v "^root" >>$seqres.full 2>&1
 	# Secondly overcome block soft limit
 	echo "Rewrite 250 blocks plus 1 byte..."
-	su $qa_user -c "$XFS_IO_PROG -c 'pwrite 0 $((250 * $BLOCK_SIZE + 1))' -c fsync \
+	_su $qa_user -c "$XFS_IO_PROG -c 'pwrite 0 $((250 * $BLOCK_SIZE + 1))' -c fsync \
 		$SCRATCH_MNT/file1" 2>&1 >>$seqres.full | \
 		_filter_xfs_io_error | tee -a $seqres.full
 	repquota -$type $SCRATCH_MNT  | grep -v "^root" >>$seqres.full 2>&1
@@ -49,14 +49,14 @@ test_enforcement()
 	# scratch device that may leed to grace time exceed.
 	setquota -$type $qa_user -T $grace $grace $SCRATCH_MNT 2>/dev/null
 	echo "Write 250 blocks..."
-	su $qa_user -c "$XFS_IO_PROG -c 'pwrite 0 $((250 * $BLOCK_SIZE))' -c fsync \
+	_su $qa_user -c "$XFS_IO_PROG -c 'pwrite 0 $((250 * $BLOCK_SIZE))' -c fsync \
 		$SCRATCH_MNT/file2" 2>&1 >>$seqres.full | \
 		_filter_xfs_io_error | tee -a $seqres.full
 	repquota -$type $SCRATCH_MNT  | grep -v "^root" >>$seqres.full 2>&1
 	# Now sleep for grace time and check that softlimit got enforced
 	sleep $((grace+1))
 	echo "Write 1 block..."
-	su $qa_user -c "$XFS_IO_PROG -c 'truncate 0' -c 'pwrite 0 $BLOCK_SIZE' \
+	_su $qa_user -c "$XFS_IO_PROG -c 'truncate 0' -c 'pwrite 0 $BLOCK_SIZE' \
 		$SCRATCH_MNT/file2" 2>&1 >>$seqres.full | \
 		_filter_xfs_io_error | tee -a $seqres.full
 	repquota -$type $SCRATCH_MNT  | grep -v "^root" >>$seqres.full 2>&1
@@ -65,7 +65,7 @@ test_enforcement()
 	# space reservations on XFS
 	setquota -$type $qa_user 0 0 3 5 $SCRATCH_MNT
 	echo "Touch 3+4"
-	su $qa_user -c "touch $SCRATCH_MNT/file3 $SCRATCH_MNT/file4" \
+	_su $qa_user -c "touch $SCRATCH_MNT/file3 $SCRATCH_MNT/file4" \
 		2>&1 >>$seqres.full | _filter_scratch | tee -a $seqres.full
 	repquota -$type $SCRATCH_MNT  | grep -v "^root" >>$seqres.full 2>&1
 	# Try to exceed inode hardlimit
@@ -74,14 +74,14 @@ test_enforcement()
 	# scratch device that may leed to grace time exceed.
 	setquota -$type $qa_user -T $grace $grace $SCRATCH_MNT 2>/dev/null
 	echo "Touch 5+6"
-	su $qa_user -c "touch $SCRATCH_MNT/file5 $SCRATCH_MNT/file6" \
+	_su $qa_user -c "touch $SCRATCH_MNT/file5 $SCRATCH_MNT/file6" \
 		2>&1 >>$seqres.full | _filter_scratch | tee -a $seqres.full
 	repquota -$type $SCRATCH_MNT  | grep -v "^root" >>$seqres.full 2>&1
 	# Wait and check grace time enforcement
 	rm -f $SCRATCH_MNT/file5 >>$seqres.full 2>&1
 	sleep $((grace+1))
 	echo "Touch 5"
-	su $qa_user -c "touch $SCRATCH_MNT/file5" 2>&1 >>$seqres.full |
+	_su $qa_user -c "touch $SCRATCH_MNT/file5" 2>&1 >>$seqres.full |
 		_filter_scratch | tee -a $seqres.full
 	repquota -$type $SCRATCH_MNT  | grep -v "^root" >>$seqres.full 2>&1
 	echo "--- completed IO ($type)" >>$seqres.full
diff --git a/tests/generic/231 b/tests/generic/231
index ef3ea45d45d736..8dda926d875e88 100755
--- a/tests/generic/231
+++ b/tests/generic/231
@@ -24,7 +24,7 @@ _fsx()
 	for (( i = 1; i <= $tasks; i++ )); do
 		SEED=$RANDOM
 		echo "ltp/fsx $FSX_ARGS -S $SEED $SCRATCH_MNT/fsx_file$i" >>$seqres.full
-		su $qa_user -c "ltp/fsx $FSX_ARGS -S $SEED \
+		_su $qa_user -c "ltp/fsx $FSX_ARGS -S $SEED \
 			$FSX_AVOID $SCRATCH_MNT/fsx_file$i" >$tmp.output$i 2>&1 &
 	done
 
diff --git a/tests/generic/233 b/tests/generic/233
index b4c804ff217fbb..df67b39092b7cb 100755
--- a/tests/generic/233
+++ b/tests/generic/233
@@ -43,7 +43,7 @@ _fsstress()
 	# temporarily.
 	ulimit -l unlimited
 	echo "fsstress $args" >> $seqres.full
-	if ! su $qa_user -c "$FSSTRESS_PROG $args" | tee -a $seqres.full | _filter_num
+	if ! _su $qa_user -c "$FSSTRESS_PROG $args" | tee -a $seqres.full | _filter_num
 	then
 		echo "    fsstress $args returned $?"
 		cat $tmp.out | tee -a $seqres.full
diff --git a/tests/generic/270 b/tests/generic/270
index 342ac8b5d3d963..d74971bb535239 100755
--- a/tests/generic/270
+++ b/tests/generic/270
@@ -37,14 +37,14 @@ _workout()
 	# io_uring_queue_init fail on ENOMEM, set max locked memory to unlimited
 	# temporarily.
 	ulimit -l unlimited
-	su $qa_user -c "$_FSSTRESS_PROG $args" > /dev/null 2>&1 &
+	_su $qa_user -c "$_FSSTRESS_PROG $args" > /dev/null 2>&1 &
 	_FSSTRESS_PID=$!
 
 	echo "Run dd writers in parallel"
 	for ((i=0; i < num_iterations; i++))
 	do
 		# File will be opened with O_TRUNC each time
-		su $qa_user -c "dd if=/dev/zero \
+		_su $qa_user -c "dd if=/dev/zero \
 			of=$SCRATCH_MNT/SPACE_CONSUMER bs=1M " \
 			>> $seqres.full 2>&1
 		sleep $enospc_time
diff --git a/tests/generic/314 b/tests/generic/314
index 5fbc6424de3ab4..65f7f9d9619f2e 100755
--- a/tests/generic/314
+++ b/tests/generic/314
@@ -27,7 +27,7 @@ chown $qa_user:12345 $TEST_DIR/$seq-dir
 chmod 2775 $TEST_DIR/$seq-dir
 
 # Make subdir
-su $qa_user -c "umask 022; mkdir $TEST_DIR/$seq-dir/subdir"
+_su $qa_user -c "umask 022; mkdir $TEST_DIR/$seq-dir/subdir"
 
 # Subdir should have inherited sgid
 _ls_l $TEST_DIR/$seq-dir/ | grep -v total | _filter_test_dir | awk '{print $1,$NF}'
diff --git a/tests/generic/327 b/tests/generic/327
index 2323e1e6a12ec8..18cfcd1f655bd7 100755
--- a/tests/generic/327
+++ b/tests/generic/327
@@ -47,7 +47,7 @@ _report_quota_blocks $SCRATCH_MNT
 echo "Try to reflink again"
 touch $testdir/file3
 chown $qa_user $testdir/file3
-su $qa_user -c "cp --reflink=always -f $testdir/file1 $testdir/file3" 2>&1 | _filter_scratch
+_su $qa_user -c "cp --reflink=always -f $testdir/file1 $testdir/file3" 2>&1 | _filter_scratch
 _report_quota_blocks $SCRATCH_MNT
 
 # success, all done
diff --git a/tests/generic/328 b/tests/generic/328
index 7071ded259ddb3..fa33bdb78dba12 100755
--- a/tests/generic/328
+++ b/tests/generic/328
@@ -47,12 +47,12 @@ setquota -u $qa_user 0 1024 0 0 $SCRATCH_MNT
 _report_quota_blocks $SCRATCH_MNT
 
 echo "Try to dio write the whole file"
-su $qa_user -c '$XFS_IO_PROG -d -c "pwrite 0 '$((sz+65536))'" '$testdir'/file1' 2>&1 >> $seqres.full | \
+_su $qa_user -c '$XFS_IO_PROG -d -c "pwrite 0 '$((sz+65536))'" '$testdir'/file1' 2>&1 >> $seqres.full | \
 	_filter_xfs_io_error
 _report_quota_blocks $SCRATCH_MNT
 
 echo "Try to write the whole file"
-su $qa_user -c '$XFS_IO_PROG -c "pwrite 0 '$((sz+65536))'" '$testdir'/file1' 2>&1 >> $seqres.full | \
+_su $qa_user -c '$XFS_IO_PROG -c "pwrite 0 '$((sz+65536))'" '$testdir'/file1' 2>&1 >> $seqres.full | \
 	_filter_xfs_io_error
 _report_quota_blocks $SCRATCH_MNT
 
diff --git a/tests/generic/355 b/tests/generic/355
index b0f8fc45d2b5f4..6b4f7ebae86405 100755
--- a/tests/generic/355
+++ b/tests/generic/355
@@ -22,7 +22,7 @@ rm -f $testfile
 
 do_io()
 {
-	su $qa_user -c "$XFS_IO_PROG -d -c 'pwrite 0 4k' $testfile" \
+	_su $qa_user -c "$XFS_IO_PROG -d -c 'pwrite 0 4k' $testfile" \
 		>>$seqres.full
 }
 
diff --git a/tests/generic/453 b/tests/generic/453
index b7e686f37100da..04945ad1085b2d 100755
--- a/tests/generic/453
+++ b/tests/generic/453
@@ -196,7 +196,7 @@ setf "job offer\xef\xb9\x92pdf" "small full stop"
 setf "job offer\xef\xbc\x8epdf" "fullwidth full stop"
 setf "job offer\xdc\x81pdf" "syriac supralinear full stop"
 setf "job offer\xdc\x82pdf" "syriac sublinear full stop"
-setf "job offer\xea\x93\xb8pdf" "lisu letter tone mya ti"
+setf "job offer\xea\x93\xb8pdf" "li_su letter tone mya ti"
 setf "job offer.pdf" "actual period"
 
 # encoding hidden tag characters in filenames to create confusing names
@@ -270,7 +270,7 @@ testf "job offer\xef\xb9\x92pdf" "small full stop"
 testf "job offer\xef\xbc\x8epdf" "fullwidth full stop"
 testf "job offer\xdc\x81pdf" "syriac supralinear full stop"
 testf "job offer\xdc\x82pdf" "syriac sublinear full stop"
-testf "job offer\xea\x93\xb8pdf" "lisu letter tone mya ti"
+testf "job offer\xea\x93\xb8pdf" "li_su letter tone mya ti"
 testf "job offer.pdf" "actual period"
 
 testf "llamapirate\xf3\xa0\x80\x81\xf3\xa0\x81\x94\xf3\xa0\x81\xa8\xf3\xa0\x81\xa5\xf3\xa0\x80\xa0\xf3\xa0\x81\xb3\xf3\xa0\x81\xa1\xf3\xa0\x81\xac\xf3\xa0\x81\xa5\xf3\xa0\x81\xb3\xf3\xa0\x80\xa0\xf3\xa0\x81\xa6\xf3\xa0\x81\xaf\xf3\xa0\x81\xb2\xf3\xa0\x80\xa0\xf3\xa0\x81\x93\xf3\xa0\x81\xa5\xf3\xa0\x81\xa1\xf3\xa0\x81\xb4\xf3\xa0\x81\xb4\xf3\xa0\x81\xac\xf3\xa0\x81\xa5\xf3\xa0\x80\xa0\xf3\xa0\x81\xb7\xf3\xa0\x81\xa5\xf3\xa0\x81\xb2\xf3\xa0\x81\xa5\xf3\xa0\x80\xa0\xf3\xa0\x81\x95\xf3\xa0\x81\x93\xf3\xa0\x81\x84\xf3\xa0\x80\xa0\xf3\xa0\x80\xb1\xf3\xa0\x80\xb2\xf3\xa0\x80\xb0\xf3\xa0\x80\xb0\xf3\xa0\x80\xb0\xf3\xa0\x80\xb0\xf3\xa0\x81\xbf"
@@ -307,7 +307,7 @@ if _check_xfs_scrub_does_unicode "$SCRATCH_MNT" "$SCRATCH_DEV"; then
 		grep -q "job offer.xef.xbc.x8epdf" $tmp.scrub || echo "No complaints about fullwidth full stop?"
 		grep -q "job offer.xdc.x81pdf" $tmp.scrub || echo "No complaints about syriac supralinear full stop?"
 		grep -q "job offer.xdc.x82pdf" $tmp.scrub || echo "No complaints about syriac sublinear full stop?"
-		grep -q "job offer.xea.x93.xb8pdf" $tmp.scrub || echo "No complaints about lisu letter tone mya ti?"
+		grep -q "job offer.xea.x93.xb8pdf" $tmp.scrub || echo "No complaints about li_su letter tone mya ti?"
 		grep -q "job offer.*could be confused with" $tmp.scrub || echo "No complaints about confusing job offers?"
 		grep -q "job offer.xe2.x80.xa4.xe2.x80.x8dpdf" $tmp.scrub || echo "No complaints about one dot leader with invisible space?"
 		grep -q "llamapirate" $tmp.scrub || echo "No complaints about hidden llm instructions in filenames?"
diff --git a/tests/generic/514 b/tests/generic/514
index 7f3d9c16cb70a4..a2086a255c77c6 100755
--- a/tests/generic/514
+++ b/tests/generic/514
@@ -21,7 +21,7 @@ _scratch_mount
 
 chmod a+rwx $SCRATCH_MNT
 $XFS_IO_PROG -f -c "pwrite -S 0x18 0 1m" $SCRATCH_MNT/foo >>$seqres.full
-su -s/bin/bash - $qa_user -c "ulimit -f 64 ; $XFS_IO_PROG -f -c \"reflink $SCRATCH_MNT/foo\" $SCRATCH_MNT/bar" >> $seqres.full 2>&1
+_su -s/bin/bash - $qa_user -c "ulimit -f 64 ; $XFS_IO_PROG -f -c \"reflink $SCRATCH_MNT/foo\" $SCRATCH_MNT/bar" >> $seqres.full 2>&1
 
 sz="$(_get_filesize $SCRATCH_MNT/bar)"
 if [ "$sz" -ne 0 ] && [ "$sz" -ne 65536 ]; then
diff --git a/tests/generic/573 b/tests/generic/573
index b310fccbddda56..d3f3296cb6bafa 100755
--- a/tests/generic/573
+++ b/tests/generic/573
@@ -56,7 +56,7 @@ $CHATTR_PROG -i $fsv_file
 _fsv_scratch_begin_subtest "FS_IOC_MEASURE_VERITY doesn't require root"
 _fsv_create_enable_file $fsv_file >> $seqres.full
 chmod 444 $fsv_file
-su $qa_user -c "$FSVERITY_PROG measure $fsv_file" >> $seqres.full
+_su $qa_user -c "$FSVERITY_PROG measure $fsv_file" >> $seqres.full
 
 # success, all done
 status=0
diff --git a/tests/generic/600 b/tests/generic/600
index 43f75376a10efc..31c832251ebb6f 100755
--- a/tests/generic/600
+++ b/tests/generic/600
@@ -33,7 +33,7 @@ setquota -t -u 0 1 $SCRATCH_MNT
 # Soft inode limit 1, hard limit 5
 setquota -u $qa_user 0 0 1 5 $SCRATCH_MNT
 # Run qa user over soft limit and go over grace period
-su $qa_user -c "touch $SCRATCH_MNT/file1 $SCRATCH_MNT/file2"
+_su $qa_user -c "touch $SCRATCH_MNT/file1 $SCRATCH_MNT/file2"
 sleep 3
 # Extend grace to now + 100s
 now=`date +%s`
diff --git a/tests/generic/601 b/tests/generic/601
index 78b6a4aaa13748..320ac0c758b766 100755
--- a/tests/generic/601
+++ b/tests/generic/601
@@ -42,7 +42,7 @@ $XFS_QUOTA_PROG -x -c "timer -u -i -d 1" $SCRATCH_MNT
 # Soft inode limit 1, hard limit 5
 $XFS_QUOTA_PROG -x -c "limit -u isoft=1 ihard=5 $qa_user" $SCRATCH_MNT
 # Run qa user over soft limit and go over grace period
-su $qa_user -c "touch $SCRATCH_MNT/file1 $SCRATCH_MNT/file2"
+_su $qa_user -c "touch $SCRATCH_MNT/file1 $SCRATCH_MNT/file2"
 sleep 3
 # Extend grace to now + 100s
 now=`date +%s`
diff --git a/tests/generic/603 b/tests/generic/603
index 2a75cf9e022750..b199f801a8f03f 100755
--- a/tests/generic/603
+++ b/tests/generic/603
@@ -66,13 +66,13 @@ test_grace()
 	echo "--- Test block quota ---"
 	# Firstly fit below block soft limit
 	echo "Write 225 blocks..."
-	su $qa_user -c "$XFS_IO_PROG -c 'pwrite 0 $((225 * $BLOCK_SIZE))' \
+	_su $qa_user -c "$XFS_IO_PROG -c 'pwrite 0 $((225 * $BLOCK_SIZE))' \
 		-c fsync $dir/file1" 2>&1 >>$seqres.full | \
 		_filter_xfs_io_error | tee -a $seqres.full
 	repquota -v -$type $SCRATCH_MNT | grep -v "^root" >>$seqres.full 2>&1
 	# Secondly overcome block soft limit
 	echo "Rewrite 250 blocks plus 1 byte, over the block softlimit..."
-	su $qa_user -c "$XFS_IO_PROG -c 'pwrite 0 $((250 * $BLOCK_SIZE + 1))' \
+	_su $qa_user -c "$XFS_IO_PROG -c 'pwrite 0 $((250 * $BLOCK_SIZE + 1))' \
 		-c fsync $dir/file1" 2>&1 >>$seqres.full | \
 		_filter_xfs_io_error | tee -a $seqres.full
 	repquota -v -$type $SCRATCH_MNT | grep -v "^root" >>$seqres.full 2>&1
@@ -81,7 +81,7 @@ test_grace()
 	# Now sleep enough grace time and check that softlimit got enforced
 	sleep $((bgrace + 1))
 	echo "Try to write 1 one more block after grace..."
-	su $qa_user -c "$XFS_IO_PROG -c 'truncate 0' -c 'pwrite 0 $BLOCK_SIZE' \
+	_su $qa_user -c "$XFS_IO_PROG -c 'truncate 0' -c 'pwrite 0 $BLOCK_SIZE' \
 		$dir/file2" 2>&1 >>$seqres.full | _filter_xfs_io_error | \
 		filter_enospc_edquot $type | tee -a $seqres.full
 	repquota -v -$type $SCRATCH_MNT | grep -v "^root" >>$seqres.full 2>&1
@@ -91,7 +91,7 @@ test_grace()
 	# space reservations on XFS
 	setquota -$type $qa_user 0 0 3 100 $SCRATCH_MNT 
 	echo "Create 2 more files, over the inode softlimit..."
-	su $qa_user -c "touch $dir/file3 $dir/file4" 2>&1 >>$seqres.full | \
+	_su $qa_user -c "touch $dir/file3 $dir/file4" 2>&1 >>$seqres.full | \
 		_filter_scratch | tee -a $seqres.full
 	repquota -v -$type $SCRATCH_MNT  | grep -v "^root" >>$seqres.full 2>&1
 	# Reset grace time here, make below grace time test more accurate
@@ -99,7 +99,7 @@ test_grace()
 	# Wait and check grace time enforcement
 	sleep $((igrace+1))
 	echo "Try to create one more inode after grace..."
-	su $qa_user -c "touch $dir/file5" 2>&1 >>$seqres.full | \
+	_su $qa_user -c "touch $dir/file5" 2>&1 >>$seqres.full | \
 		filter_enospc_edquot $type | _filter_scratch | \
 		tee -a $seqres.full
 	repquota -v -$type $SCRATCH_MNT  | grep -v "^root" >>$seqres.full 2>&1
diff --git a/tests/generic/673 b/tests/generic/673
index 8f6def9c78881a..6c54ade81f0cec 100755
--- a/tests/generic/673
+++ b/tests/generic/673
@@ -39,7 +39,7 @@ commit_and_check() {
 
 	local cmd="$XFS_IO_PROG -c 'reflink $SCRATCH_MNT/b 0 0 1m' $SCRATCH_MNT/a"
 	if [ -n "$user" ]; then
-		su - "$user" -c "$cmd" >> $seqres.full
+		_su - "$user" -c "$cmd" >> $seqres.full
 	else
 		$SHELL -c "$cmd" >> $seqres.full
 	fi
diff --git a/tests/generic/674 b/tests/generic/674
index 1b711f27f39ed1..41fbdeb7d9eb17 100755
--- a/tests/generic/674
+++ b/tests/generic/674
@@ -42,7 +42,7 @@ commit_and_check() {
 
 	local cmd="$XFS_IO_PROG -c 'dedupe $SCRATCH_MNT/b 0 0 1m' $SCRATCH_MNT/a"
 	if [ -n "$user" ]; then
-		su - "$user" -c "$cmd" >> $seqres.full
+		_su - "$user" -c "$cmd" >> $seqres.full
 	else
 		$SHELL -c "$cmd" >> $seqres.full
 	fi
diff --git a/tests/generic/675 b/tests/generic/675
index e66de84b546a25..87dfbdfe278dd2 100755
--- a/tests/generic/675
+++ b/tests/generic/675
@@ -44,7 +44,7 @@ commit_and_check() {
 
 	local cmd="$XFS_IO_PROG -c 'reflink $SCRATCH_MNT/b 0 0 1m' $SCRATCH_MNT/a"
 	if [ -n "$user" ]; then
-		su - "$user" -c "$cmd" >> $seqres.full
+		_su - "$user" -c "$cmd" >> $seqres.full
 	else
 		$SHELL -c "$cmd" >> $seqres.full
 	fi
diff --git a/tests/generic/680 b/tests/generic/680
index 07048db5cc39a9..1a418fa3b61b0b 100755
--- a/tests/generic/680
+++ b/tests/generic/680
@@ -38,7 +38,7 @@ chmod 0644 $localfile
 cp $here/src/splice2pipe $tmp.splice2pipe
 # Test unprivileged user's privilege escalation
 echo "Test unprivileged user:"
-su ${qa_user} -c "$tmp.splice2pipe $localfile 1 AAAAAAAABBBBBBBB"
+_su ${qa_user} -c "$tmp.splice2pipe $localfile 1 AAAAAAAABBBBBBBB"
 _hexdump $localfile
 
 # success, all done
diff --git a/tests/generic/681 b/tests/generic/681
index aef54205d26f3a..dc4252013fc058 100755
--- a/tests/generic/681
+++ b/tests/generic/681
@@ -55,7 +55,7 @@ ls -sld $scratchdir  >> $seqres.full
 echo "fail quota" >> $seqres.full
 for ((i = 0; i < dirents; i++)); do
 	name=$(printf "y%0254d" $i)
-	su - "$qa_user" -c "ln $scratchfile $scratchdir/$name" 2>&1 | \
+	_su - "$qa_user" -c "ln $scratchfile $scratchdir/$name" 2>&1 | \
 		_filter_scratch | sed -e 's/y[0-9]*/yXXX/g'
 	test "${PIPESTATUS[0]}" -ne 0 && break
 done
diff --git a/tests/generic/682 b/tests/generic/682
index 3572af173cbe63..6914a549dc0975 100755
--- a/tests/generic/682
+++ b/tests/generic/682
@@ -65,7 +65,7 @@ echo "fail quota" >> $seqres.full
 for ((i = 0; i < dirents; i++)); do
 	name=$(printf "y%0254d" $i)
 	ln $scratchfile $stagedir/$name
-	su - "$qa_user" -c "mv $stagedir/$name $scratchdir/$name" 2>&1 | \
+	_su - "$qa_user" -c "mv $stagedir/$name $scratchdir/$name" 2>&1 | \
 		_filter_scratch | _filter_mv_output
 	test "${PIPESTATUS[0]}" -ne 0 && break
 done
diff --git a/tests/generic/683 b/tests/generic/683
index cc9a9786bde4bf..883905da5f9082 100755
--- a/tests/generic/683
+++ b/tests/generic/683
@@ -49,7 +49,7 @@ commit_and_check() {
 
 	local cmd="$XFS_IO_PROG -c '$command $start $end' $junk_file"
 	if [ -n "$user" ]; then
-		su - "$user" -c "$cmd" >> $seqres.full
+		_su - "$user" -c "$cmd" >> $seqres.full
 	else
 		$SHELL -c "$cmd" >> $seqres.full
 	fi
diff --git a/tests/generic/684 b/tests/generic/684
index 2ca036fe518050..9cdfe4ab4f4463 100755
--- a/tests/generic/684
+++ b/tests/generic/684
@@ -49,7 +49,7 @@ commit_and_check() {
 
 	local cmd="$XFS_IO_PROG -c '$command $start $end' $junk_file"
 	if [ -n "$user" ]; then
-		su - "$user" -c "$cmd" >> $seqres.full
+		_su - "$user" -c "$cmd" >> $seqres.full
 	else
 		$SHELL -c "$cmd" >> $seqres.full
 	fi
diff --git a/tests/generic/685 b/tests/generic/685
index de07a798a68594..5567255032e1c7 100755
--- a/tests/generic/685
+++ b/tests/generic/685
@@ -49,7 +49,7 @@ commit_and_check() {
 
 	local cmd="$XFS_IO_PROG -c '$command $start $end' $junk_file"
 	if [ -n "$user" ]; then
-		su - "$user" -c "$cmd" >> $seqres.full
+		_su - "$user" -c "$cmd" >> $seqres.full
 	else
 		$SHELL -c "$cmd" >> $seqres.full
 	fi
diff --git a/tests/generic/686 b/tests/generic/686
index fc6761fe61a91e..a3fa8e060aeab6 100755
--- a/tests/generic/686
+++ b/tests/generic/686
@@ -49,7 +49,7 @@ commit_and_check() {
 
 	local cmd="$XFS_IO_PROG -c '$command $start $end' $junk_file"
 	if [ -n "$user" ]; then
-		su - "$user" -c "$cmd" >> $seqres.full
+		_su - "$user" -c "$cmd" >> $seqres.full
 	else
 		$SHELL -c "$cmd" >> $seqres.full
 	fi
diff --git a/tests/generic/687 b/tests/generic/687
index 82dce88b85ef6d..0c4b09d29fe5e6 100755
--- a/tests/generic/687
+++ b/tests/generic/687
@@ -49,7 +49,7 @@ commit_and_check() {
 
 	local cmd="$XFS_IO_PROG -c '$command $start $end' $junk_file"
 	if [ -n "$user" ]; then
-		su - "$user" -c "$cmd" >> $seqres.full
+		_su - "$user" -c "$cmd" >> $seqres.full
 	else
 		$SHELL -c "$cmd" >> $seqres.full
 	fi
diff --git a/tests/generic/688 b/tests/generic/688
index e491d5cf30af23..77db29461415b3 100755
--- a/tests/generic/688
+++ b/tests/generic/688
@@ -51,7 +51,7 @@ commit_and_check() {
 
 	local cmd="$XFS_IO_PROG -c 'falloc 0 64k' $junk_file"
 	if [ -n "$user" ]; then
-		su - "$user" -c "$cmd" >> $seqres.full
+		_su - "$user" -c "$cmd" >> $seqres.full
 	else
 		$SHELL -c "$cmd" >> $seqres.full
 	fi
diff --git a/tests/generic/691 b/tests/generic/691
index f33d6edf18a1d1..30ae4a1e384a05 100755
--- a/tests/generic/691
+++ b/tests/generic/691
@@ -75,11 +75,11 @@ exercise()
 	setquota -${type} -t 86400 86400 $SCRATCH_MNT
 	repquota -v -${type} $SCRATCH_MNT | grep -v "^root" >>$seqres.full 2>&1
 	# Exceed the soft quota limit a bit at first
-	su $qa_user -c "$XFS_IO_PROG -f -t -c 'pwrite 0 2m' -c fsync ${file}.0" >>$seqres.full
+	_su $qa_user -c "$XFS_IO_PROG -f -t -c 'pwrite 0 2m' -c fsync ${file}.0" >>$seqres.full
 	# Write more data more times under soft quota limit exhausted condition,
 	# but not reach hard limit. To make sure each write won't trigger EDQUOT.
 	for ((i=1; i<=100; i++));do
-		su "$qa_user" -c "$XFS_IO_PROG -f -c 'pwrite 0 1m' -c fsync ${file}.$i" >>$seqres.full
+		_su "$qa_user" -c "$XFS_IO_PROG -f -c 'pwrite 0 1m' -c fsync ${file}.$i" >>$seqres.full
 		if [ $? -ne 0 ];then
 			echo "Unexpected error (type=$type)!"
 			break
@@ -89,9 +89,9 @@ exercise()
 
 	# As we've tested soft limit, now exceed the hard limit and give it a
 	# test in passing.
-	su $qa_user -c "$XFS_IO_PROG -f -t -c 'pwrite 0 100m' -c fsync ${file}.hard.0" 2>&1 >/dev/null | filter_quota $type
+	_su $qa_user -c "$XFS_IO_PROG -f -t -c 'pwrite 0 100m' -c fsync ${file}.hard.0" 2>&1 >/dev/null | filter_quota $type
 	for ((i=1; i<=10; i++));do
-		su "$qa_user" -c "$XFS_IO_PROG -f -c 'pwrite 0 1m' -c fsync ${file}.hard.$i" 2>&1 | filter_quota $type
+		_su "$qa_user" -c "$XFS_IO_PROG -f -c 'pwrite 0 1m' -c fsync ${file}.hard.$i" 2>&1 | filter_quota $type
 	done
 }
 
diff --git a/tests/generic/721 b/tests/generic/721
index a9565f18917831..75d5063c2d1701 100755
--- a/tests/generic/721
+++ b/tests/generic/721
@@ -52,7 +52,7 @@ cmd="$XFS_IO_PROG \
 	-c 'pwrite -S 0x60 44k 55k -b 1m' \
 	-c 'commitupdate -q' \
 	\"$dir/a\""
-su -s /bin/bash -c "$cmd" $qa_user 2>&1 | _filter_xfs_io | _filter_test_dir
+_su -s /bin/bash -c "$cmd" $qa_user 2>&1 | _filter_xfs_io | _filter_test_dir
 
 filesnap "after commit" $dir/a
 echo
@@ -67,7 +67,7 @@ cmd="$XFS_IO_PROG \
 	-c 'pwrite -S 0x60 0 55k' \
 	-c 'commitupdate -q' \
 	\"$dir/a\""
-su -s /bin/bash -c "$cmd" $qa_user 2>&1 | _filter_xfs_io | _filter_test_dir
+_su -s /bin/bash -c "$cmd" $qa_user 2>&1 | _filter_xfs_io | _filter_test_dir
 
 filesnap "after shorten commit" $dir/a
 echo
@@ -81,7 +81,7 @@ cmd="$XFS_IO_PROG \
 	-c \"pwrite -S 0x60 0 $(( (blksz * nrblks) + 37373 ))\" \
 	-c 'commitupdate -q' \
 	\"$dir/a\""
-su -s /bin/bash -c "$cmd" $qa_user 2>&1 | _filter_xfs_io | _filter_test_dir
+_su -s /bin/bash -c "$cmd" $qa_user 2>&1 | _filter_xfs_io | _filter_test_dir
 
 filesnap "after lengthen commit" $dir/a
 echo
@@ -96,7 +96,7 @@ cmd="$XFS_IO_PROG \
 	-c 'pwrite -S 0x60 44k 55k -b 1m' \
 	-c 'cancelupdate' \
 	\"$dir/a\""
-su -s /bin/bash -c "$cmd" $qa_user 2>&1 | _filter_xfs_io | _filter_test_dir
+_su -s /bin/bash -c "$cmd" $qa_user 2>&1 | _filter_xfs_io | _filter_test_dir
 
 filesnap "after cancel" $dir/a
 echo
@@ -115,7 +115,7 @@ cmd="$XFS_IO_PROG \
 	-c 'pwrite -S 0x61 22k 11k -b 1m' \
 	-c 'commitupdate -q' \
 	\"$dir/a\""
-su -s /bin/bash -c "$cmd" $qa_user 2>&1 | _filter_xfs_io | _filter_test_dir
+_su -s /bin/bash -c "$cmd" $qa_user 2>&1 | _filter_xfs_io | _filter_test_dir
 
 filesnap "after fail commit" $dir/a
 echo
diff --git a/tests/generic/726 b/tests/generic/726
index 131ac5b503e1a4..d2a2a2cebe522e 100755
--- a/tests/generic/726
+++ b/tests/generic/726
@@ -46,7 +46,7 @@ commit_and_check() {
 
 	local cmd="$XFS_IO_PROG -c 'startupdate' -c 'pwrite -S 0x57 0 1m' -c 'commitupdate' $SCRATCH_MNT/a"
 	if [ -n "$user" ]; then
-		su - "$user" -c "$cmd" >> $seqres.full
+		_su - "$user" -c "$cmd" >> $seqres.full
 	else
 		$SHELL -c "$cmd" >> $seqres.full
 	fi
diff --git a/tests/generic/727 b/tests/generic/727
index ee7ed9760a165a..9551e47cb13b06 100755
--- a/tests/generic/727
+++ b/tests/generic/727
@@ -54,7 +54,7 @@ commit_and_check() {
 
 	local cmd="$XFS_IO_PROG -c 'startupdate' -c 'pwrite -S 0x57 0 1m' -c 'commitupdate' $SCRATCH_MNT/a"
 	if [ -n "$user" ]; then
-		su - "$user" -c "$cmd" >> $seqres.full
+		_su - "$user" -c "$cmd" >> $seqres.full
 	else
 		$SHELL -c "$cmd" >> $seqres.full
 	fi
diff --git a/tests/xfs/720 b/tests/xfs/720
index f928cc43d3bc54..68a6c7f6e2d584 100755
--- a/tests/xfs/720
+++ b/tests/xfs/720
@@ -61,7 +61,7 @@ $XFS_QUOTA_PROG -x -c 'report -u' $SCRATCH_MNT >> $seqres.full
 
 # Fail at appending the file as qa_user to ensure quota enforcement works
 echo "fail quota" >> $seqres.full
-su - "$qa_user" -c "$XFS_IO_PROG -c 'pwrite 10g 1' $scratchfile" >> $seqres.full
+_su - "$qa_user" -c "$XFS_IO_PROG -c 'pwrite 10g 1' $scratchfile" >> $seqres.full
 $XFS_QUOTA_PROG -x -c 'report -u' $SCRATCH_MNT >> $seqres.full
 
 # success, all done
diff --git a/tests/xfs/795 b/tests/xfs/795
index 5a67f02ec92eca..217f96092a4c42 100755
--- a/tests/xfs/795
+++ b/tests/xfs/795
@@ -63,7 +63,7 @@ $XFS_QUOTA_PROG -x -c 'report -u' $SCRATCH_MNT >> $seqres.full
 echo "fail quota" >> $seqres.full
 for ((i = 0; i < dirents; i++)); do
 	name=$(printf "y%0254d" $i)
-	su - "$qa_user" -c "ln $scratchfile $scratchdir/$name" 2>&1 | \
+	_su - "$qa_user" -c "ln $scratchfile $scratchdir/$name" 2>&1 | \
 		_filter_scratch | sed -e 's/y[0-9]*/yXXX/g'
 	test "${PIPESTATUS[0]}" -ne 0 && break
 done
diff --git a/tests/xfs/803 b/tests/xfs/803
index e3277181b41af0..4e5a58c4a3328e 100755
--- a/tests/xfs/803
+++ b/tests/xfs/803
@@ -88,7 +88,7 @@ echo set too long value
 $XFS_IO_PROG -c "setfsprops $propname=$longpropval" $TEST_DIR
 
 echo not enough permissions
-su - "$qa_user" -c "$XFS_IO_PROG -c \"setfsprops $propname=$propval\" $TEST_DIR" 2>&1 | _filter_test_dir
+_su - "$qa_user" -c "$XFS_IO_PROG -c \"setfsprops $propname=$propval\" $TEST_DIR" 2>&1 | _filter_test_dir
 
 echo "*** DB TEST ***"