Index: head/contrib/pjdfstest/tests/chflags/12.t
===================================================================
--- head/contrib/pjdfstest/tests/chflags/12.t	(revision 272086)
+++ head/contrib/pjdfstest/tests/chflags/12.t	(revision 272087)
@@ -1,68 +1,68 @@
 #!/bin/sh
 # $FreeBSD: head/tools/regression/pjdfstest/tests/chflags/12.t 211352 2010-08-15 21:24:17Z pjd $
 
 desc="chflags returns EROFS if the named file resides on a read-only file system"
 
 dir=`dirname $0`
 . ${dir}/../misc.sh
 
 require chflags
 
 case "${os}:${fs}" in
 FreeBSD:UFS)
 	echo "1..14"
 
 	n0=`namegen`
 	n1=`namegen`
 
 	expect 0 mkdir ${n0} 0755
-	n=`mdconfig -a -n -t malloc -s 1m`
-	newfs /dev/md${n} >/dev/null
+	n=`mdconfig -a -n -t malloc -s 1m` || exit
+	newfs /dev/md${n} >/dev/null || exit
 	mount /dev/md${n} ${n0}
 	expect 0 create ${n0}/${n1} 0644
 	expect 0 chflags ${n0}/${n1} UF_IMMUTABLE
 	expect UF_IMMUTABLE stat ${n0}/${n1} flags
 	expect 0 chflags ${n0}/${n1} none
 	expect none stat ${n0}/${n1} flags
 	mount -ur /dev/md${n}
 	expect EROFS chflags ${n0}/${n1} UF_IMMUTABLE
 	expect none stat ${n0}/${n1} flags
 	mount -uw /dev/md${n}
 	expect 0 chflags ${n0}/${n1} UF_IMMUTABLE
 	expect UF_IMMUTABLE stat ${n0}/${n1} flags
 	expect 0 chflags ${n0}/${n1} none
 	expect none stat ${n0}/${n1} flags
 	expect 0 unlink ${n0}/${n1}
 	umount /dev/md${n}
-	mdconfig -d -u ${n}
+	mdconfig -d -u ${n} || exit
 	expect 0 rmdir ${n0}
 	;;
 FreeBSD:ZFS)
 	echo "1..12"
 
 	n0=`namegen`
 	n1=`namegen`
 
-	n=`mdconfig -a -n -t malloc -s 128m`
+	n=`mdconfig -a -n -t malloc -s 128m` || exit
 	zpool create ${n0} /dev/md${n}
 	expect 0 create /${n0}/${n1} 0644
 	expect 0 chflags /${n0}/${n1} UF_NODUMP
 	expect UF_NODUMP stat /${n0}/${n1} flags
 	expect 0 chflags /${n0}/${n1} none
 	expect none stat /${n0}/${n1} flags
 	zfs set readonly=on ${n0}
 	expect EROFS chflags /${n0}/${n1} UF_NODUMP
 	expect none stat /${n0}/${n1} flags
 	zfs set readonly=off ${n0}
 	expect 0 chflags /${n0}/${n1} UF_NODUMP
 	expect UF_NODUMP stat /${n0}/${n1} flags
 	expect 0 chflags /${n0}/${n1} none
 	expect none stat /${n0}/${n1} flags
 	expect 0 unlink /${n0}/${n1}
 	zpool destroy ${n0}
-	mdconfig -d -u ${n}
+	mdconfig -d -u ${n} || exit
 	;;
 *)
 	quick_exit
 	;;
 esac
Index: head/contrib/pjdfstest/tests/chmod/09.t
===================================================================
--- head/contrib/pjdfstest/tests/chmod/09.t	(revision 272086)
+++ head/contrib/pjdfstest/tests/chmod/09.t	(revision 272087)
@@ -1,37 +1,37 @@
 #!/bin/sh
 # $FreeBSD: head/tools/regression/pjdfstest/tests/chmod/09.t 211352 2010-08-15 21:24:17Z pjd $
 
 desc="chmod returns EROFS if the named file resides on a read-only file system"
 
 dir=`dirname $0`
 . ${dir}/../misc.sh
 
 [ "${os}:${fs}" = "FreeBSD:UFS" ] || quick_exit
 
 echo "1..15"
 
 n0=`namegen`
 n1=`namegen`
 
 expect 0 mkdir ${n0} 0755
-n=`mdconfig -a -n -t malloc -s 1m`
-newfs /dev/md${n} >/dev/null
-mount /dev/md${n} ${n0}
+n=`mdconfig -a -n -t malloc -s 1m` || exit
+newfs /dev/md${n} >/dev/null || exit
+mount /dev/md${n} ${n0} || exit
 expect 0 create ${n0}/${n1} 0644
 expect 0 chmod ${n0}/${n1} 0640
 expect 0640 stat ${n0}/${n1} mode
 expect 0 lchmod ${n0}/${n1} 0530
 expect 0530 stat ${n0}/${n1} mode
 mount -ur /dev/md${n}
 expect EROFS chmod ${n0}/${n1} 0600
 expect EROFS lchmod ${n0}/${n1} 0600
 expect 0530 stat ${n0}/${n1} mode
 mount -uw /dev/md${n}
 expect 0 chmod ${n0}/${n1} 0600
 expect 0600 stat ${n0}/${n1} mode
 expect 0 lchmod ${n0}/${n1} 0640
 expect 0640 stat ${n0}/${n1} mode
 expect 0 unlink ${n0}/${n1}
 umount /dev/md${n}
-mdconfig -d -u ${n}
+mdconfig -d -u ${n} || exit
 expect 0 rmdir ${n0}
Index: head/contrib/pjdfstest/tests/chown/09.t
===================================================================
--- head/contrib/pjdfstest/tests/chown/09.t	(revision 272086)
+++ head/contrib/pjdfstest/tests/chown/09.t	(revision 272087)
@@ -1,32 +1,32 @@
 #!/bin/sh
 # $FreeBSD: head/tools/regression/pjdfstest/tests/chown/09.t 211352 2010-08-15 21:24:17Z pjd $
 
 desc="chown returns EROFS if the named file resides on a read-only file system"
 
 dir=`dirname $0`
 . ${dir}/../misc.sh
 
 [ "${os}:${fs}" = "FreeBSD:UFS" ] || quick_exit
 
 echo "1..10"
 
 n0=`namegen`
 n1=`namegen`
 
 expect 0 mkdir ${n0} 0755
-n=`mdconfig -a -n -t malloc -s 1m`
-newfs /dev/md${n} >/dev/null
-mount /dev/md${n} ${n0}
+n=`mdconfig -a -n -t malloc -s 1m` || exit
+newfs /dev/md${n} >/dev/null || exit
+mount /dev/md${n} ${n0} || exit
 expect 0 create ${n0}/${n1} 0644
 expect 0 chown ${n0}/${n1} 65534 65534
 expect 65534,65534 stat ${n0}/${n1} uid,gid
 mount -ur /dev/md${n}
 expect EROFS chown ${n0}/${n1} 65533 65533
 expect 65534,65534 stat ${n0}/${n1} uid,gid
 mount -uw /dev/md${n}
 expect 0 chown ${n0}/${n1} 65533 65533
 expect 65533,65533 stat ${n0}/${n1} uid,gid
 expect 0 unlink ${n0}/${n1}
 umount /dev/md${n}
-mdconfig -d -u ${n}
+mdconfig -d -u ${n} || exit
 expect 0 rmdir ${n0}
Index: head/contrib/pjdfstest/tests/ftruncate/10.t
===================================================================
--- head/contrib/pjdfstest/tests/ftruncate/10.t	(revision 272086)
+++ head/contrib/pjdfstest/tests/ftruncate/10.t	(revision 272087)
@@ -1,32 +1,32 @@
 #!/bin/sh
 # $FreeBSD: head/tools/regression/pjdfstest/tests/truncate/10.t 211352 2010-08-15 21:24:17Z pjd $
 
 desc="truncate returns EROFS if the named file resides on a read-only file system"
 
 dir=`dirname $0`
 . ${dir}/../misc.sh
 
 [ "${os}:${fs}" = "FreeBSD:UFS" ] || quick_exit
 
 echo "1..10"
 
 n0=`namegen`
 n1=`namegen`
 
 expect 0 mkdir ${n0} 0755
-n=`mdconfig -a -n -t malloc -s 1m`
-newfs /dev/md${n} >/dev/null
-mount /dev/md${n} ${n0}
+n=`mdconfig -a -n -t malloc -s 1m` || exit
+newfs /dev/md${n} >/dev/null || exit
+mount /dev/md${n} ${n0} || exit
 expect 0 create ${n0}/${n1} 0644
 expect 0 truncate ${n0}/${n1} 123
 expect 123 stat ${n0}/${n1} size
 mount -ur /dev/md${n}
 expect EROFS truncate ${n0}/${n1} 1234
 expect 123 stat ${n0}/${n1} size
 mount -uw /dev/md${n}
 expect 0 truncate ${n0}/${n1} 1234
 expect 1234 stat ${n0}/${n1} size
 expect 0 unlink ${n0}/${n1}
 umount /dev/md${n}
-mdconfig -d -u ${n}
+mdconfig -d -u ${n} || exit
 expect 0 rmdir ${n0}
Index: head/contrib/pjdfstest/tests/link/05.t
===================================================================
--- head/contrib/pjdfstest/tests/link/05.t	(revision 272086)
+++ head/contrib/pjdfstest/tests/link/05.t	(revision 272087)
@@ -1,36 +1,36 @@
 #!/bin/sh
 # $FreeBSD: head/tools/regression/pjdfstest/tests/link/05.t 211352 2010-08-15 21:24:17Z pjd $
 
 desc="link returns EMLINK if the link count of the file named by name1 would exceed 32767"
 
 dir=`dirname $0`
 . ${dir}/../misc.sh
 
 [ "${os}:${fs}" = "FreeBSD:UFS" ] || quick_exit
 
 echo "1..5"
 
 n0=`namegen`
 n1=`namegen`
 n2=`namegen`
 
 expect 0 mkdir ${n0} 0755
-n=`mdconfig -a -n -t malloc -s 1m`
-newfs -i 1 /dev/md${n} >/dev/null
-mount /dev/md${n} ${n0}
+n=`mdconfig -a -n -t malloc -s 1m` || exit
+newfs -i 1 /dev/md${n} >/dev/null || exit
+mount /dev/md${n} ${n0} || exit
 expect 0 create ${n0}/${n1} 0644
 i=1
 while :; do
 	link ${n0}/${n1} ${n0}/${i} >/dev/null 2>&1
 	if [ $? -ne 0 ]; then
 		break
 	fi
 	i=`expr $i + 1`
 done
 test_check $i -eq 32767
 
 expect EMLINK link ${n0}/${n1} ${n0}/${n2}
 
 umount /dev/md${n}
-mdconfig -d -u ${n}
+mdconfig -d -u ${n} || exit
 expect 0 rmdir ${n0}
Index: head/contrib/pjdfstest/tests/link/14.t
===================================================================
--- head/contrib/pjdfstest/tests/link/14.t	(revision 272086)
+++ head/contrib/pjdfstest/tests/link/14.t	(revision 272087)
@@ -1,29 +1,29 @@
 #!/bin/sh
 # $FreeBSD: head/tools/regression/pjdfstest/tests/link/14.t 211352 2010-08-15 21:24:17Z pjd $
 
 desc="link returns EXDEV if the source and the destination files are on different file systems"
 
 dir=`dirname $0`
 . ${dir}/../misc.sh
 
 [ "${os}" = "FreeBSD" ] || quick_exit
 
 echo "1..8"
 
 n0=`namegen`
 n1=`namegen`
 n2=`namegen`
 
 expect 0 mkdir ${n0} 0755
-n=`mdconfig -a -n -t malloc -s 1m`
-newfs /dev/md${n} >/dev/null
-mount /dev/md${n} ${n0}
+n=`mdconfig -a -n -t malloc -s 1m` || exit
+newfs /dev/md${n} >/dev/null || exit
+mount /dev/md${n} ${n0} || exit
 expect 0 create ${n0}/${n1} 0644
 expect EXDEV link ${n0}/${n1} ${n2}
 expect 0 unlink ${n0}/${n1}
 expect 0 create ${n1} 0644
 expect EXDEV link ${n1} ${n0}/${n2}
 expect 0 unlink ${n1}
 umount /dev/md${n}
-mdconfig -d -u ${n}
+mdconfig -d -u ${n} || exit
 expect 0 rmdir ${n0}
Index: head/contrib/pjdfstest/tests/link/15.t
===================================================================
--- head/contrib/pjdfstest/tests/link/15.t	(revision 272086)
+++ head/contrib/pjdfstest/tests/link/15.t	(revision 272087)
@@ -1,33 +1,33 @@
 #!/bin/sh
 # $FreeBSD: head/tools/regression/pjdfstest/tests/link/15.t 211352 2010-08-15 21:24:17Z pjd $
 
 desc="link returns ENOSPC if the directory in which the entry for the new link is being placed cannot be extended because there is no space left on the file system containing the directory"
 
 dir=`dirname $0`
 . ${dir}/../misc.sh
 
 [ "${os}:${fs}" = "FreeBSD:UFS" ] || quick_exit
 
 echo "1..4"
 
 n0=`namegen`
 n1=`namegen`
 n2=`namegen`
 
 expect 0 mkdir ${n0} 0755
-n=`mdconfig -a -n -t malloc -s 256k`
-newfs /dev/md${n} >/dev/null
-mount /dev/md${n} ${n0}
+n=`mdconfig -a -n -t malloc -s 512k` || exit
+newfs /dev/md${n} >/dev/null || exit
+mount /dev/md${n} ${n0} || exit
 expect 0 create ${n0}/${n1} 0644
 i=0
 while :; do
 	link ${n0}/${n1} ${n0}/${i} >/dev/null 2>&1
 	if [ $? -ne 0 ]; then
 		break
 	fi
 	i=`expr $i + 1`
 done
 expect ENOSPC link ${n0}/${n1} ${n0}/${n2}
 umount /dev/md${n}
-mdconfig -d -u ${n}
+mdconfig -d -u ${n} || exit
 expect 0 rmdir ${n0}
Index: head/contrib/pjdfstest/tests/link/16.t
===================================================================
--- head/contrib/pjdfstest/tests/link/16.t	(revision 272086)
+++ head/contrib/pjdfstest/tests/link/16.t	(revision 272087)
@@ -1,34 +1,34 @@
 #!/bin/sh
 # $FreeBSD: head/tools/regression/pjdfstest/tests/link/16.t 211352 2010-08-15 21:24:17Z pjd $
 
 desc="link returns EROFS if the requested link requires writing in a directory on a read-only file system"
 
 dir=`dirname $0`
 . ${dir}/../misc.sh
 
 [ "${os}" = "FreeBSD" ] || quick_exit
 
 echo "1..9"
 
 n0=`namegen`
 n1=`namegen`
 n2=`namegen`
 
 expect 0 mkdir ${n0} 0755
-n=`mdconfig -a -n -t malloc -s 1m`
-newfs /dev/md${n} >/dev/null
-mount /dev/md${n} ${n0}
+n=`mdconfig -a -n -t malloc -s 1m` || exit
+newfs /dev/md${n} >/dev/null || exit
+mount /dev/md${n} ${n0} || exit
 expect 0 create ${n0}/${n1} 0644
 
 expect 0 link ${n0}/${n1} ${n0}/${n2}
 expect 0 unlink ${n0}/${n2}
 mount -ur /dev/md${n}
 expect EROFS link ${n0}/${n1} ${n0}/${n2}
 mount -uw /dev/md${n}
 expect 0 link ${n0}/${n1} ${n0}/${n2}
 expect 0 unlink ${n0}/${n2}
 
 expect 0 unlink ${n0}/${n1}
 umount /dev/md${n}
-mdconfig -d -u ${n}
+mdconfig -d -u ${n} || exit
 expect 0 rmdir ${n0}
Index: head/contrib/pjdfstest/tests/mkdir/09.t
===================================================================
--- head/contrib/pjdfstest/tests/mkdir/09.t	(revision 272086)
+++ head/contrib/pjdfstest/tests/mkdir/09.t	(revision 272087)
@@ -1,29 +1,29 @@
 #!/bin/sh
 # $FreeBSD: head/tools/regression/pjdfstest/tests/mkdir/09.t 211352 2010-08-15 21:24:17Z pjd $
 
 desc="mkdir returns EROFS if the named file resides on a read-only file system"
 
 dir=`dirname $0`
 . ${dir}/../misc.sh
 
 [ "${os}:${fs}" = "FreeBSD:UFS" ] || quick_exit
 
 echo "1..7"
 
 n0=`namegen`
 n1=`namegen`
 
 expect 0 mkdir ${n0} 0755
-n=`mdconfig -a -n -t malloc -s 1m`
-newfs /dev/md${n} >/dev/null
-mount /dev/md${n} ${n0}
+n=`mdconfig -a -n -t malloc -s 1m` || exit
+newfs /dev/md${n} >/dev/null || exit
+mount /dev/md${n} ${n0} || exit
 expect 0 mkdir ${n0}/${n1} 0755
 expect 0 rmdir ${n0}/${n1}
 mount -ur /dev/md${n}
 expect EROFS mkdir ${n0}/${n1} 0755
 mount -uw /dev/md${n}
 expect 0 mkdir ${n0}/${n1} 0755
 expect 0 rmdir ${n0}/${n1}
 umount /dev/md${n}
-mdconfig -d -u ${n}
+mdconfig -d -u ${n} || exit
 expect 0 rmdir ${n0}
Index: head/contrib/pjdfstest/tests/mkdir/11.t
===================================================================
--- head/contrib/pjdfstest/tests/mkdir/11.t	(revision 272086)
+++ head/contrib/pjdfstest/tests/mkdir/11.t	(revision 272087)
@@ -1,31 +1,31 @@
 #!/bin/sh
 # $FreeBSD: head/tools/regression/pjdfstest/tests/mkdir/11.t 211352 2010-08-15 21:24:17Z pjd $
 
 desc="mkdir returns ENOSPC if there are no free inodes on the file system on which the directory is being created"
 
 dir=`dirname $0`
 . ${dir}/../misc.sh
 
 [ "${os}:${fs}" = "FreeBSD:UFS" ] || quick_exit
 
 echo "1..3"
 
 n0=`namegen`
 n1=`namegen`
 
 expect 0 mkdir ${n0} 0755
-n=`mdconfig -a -n -t malloc -s 256k`
-newfs /dev/md${n} >/dev/null
-mount /dev/md${n} ${n0}
+n=`mdconfig -a -n -t malloc -s 512k` || exit
+newfs /dev/md${n} >/dev/null || exit
+mount /dev/md${n} ${n0} || exit
 i=0
 while :; do
 	mkdir ${n0}/${i} >/dev/null 2>&1
 	if [ $? -ne 0 ]; then
 		break
 	fi
 	i=`expr $i + 1`
 done
 expect ENOSPC mkdir ${n0}/${n1} 0755
 umount /dev/md${n}
-mdconfig -d -u ${n}
+mdconfig -d -u ${n} || exit
 expect 0 rmdir ${n0}
Index: head/contrib/pjdfstest/tests/mkfifo/08.t
===================================================================
--- head/contrib/pjdfstest/tests/mkfifo/08.t	(revision 272086)
+++ head/contrib/pjdfstest/tests/mkfifo/08.t	(revision 272087)
@@ -1,29 +1,29 @@
 #!/bin/sh
 # $FreeBSD: head/tools/regression/pjdfstest/tests/mkfifo/08.t 211352 2010-08-15 21:24:17Z pjd $
 
 desc="mkfifo returns EROFS if the named file resides on a read-only file system"
 
 dir=`dirname $0`
 . ${dir}/../misc.sh
 
 [ "${os}:${fs}" = "FreeBSD:UFS" ] || quick_exit
 
 echo "1..7"
 
 n0=`namegen`
 n1=`namegen`
 
 expect 0 mkdir ${n0} 0755
-n=`mdconfig -a -n -t malloc -s 1m`
-newfs /dev/md${n} >/dev/null
-mount /dev/md${n} ${n0}
+n=`mdconfig -a -n -t malloc -s 1m` || exit
+newfs /dev/md${n} >/dev/null || exit
+mount /dev/md${n} ${n0} || exit
 expect 0 mkfifo ${n0}/${n1} 0644
 expect 0 unlink ${n0}/${n1}
 mount -ur /dev/md${n}
 expect EROFS mkfifo ${n0}/${n1} 0644
 mount -uw /dev/md${n}
 expect 0 mkfifo ${n0}/${n1} 0644
 expect 0 unlink ${n0}/${n1}
 umount /dev/md${n}
-mdconfig -d -u ${n}
+mdconfig -d -u ${n} || exit
 expect 0 rmdir ${n0}
Index: head/contrib/pjdfstest/tests/mkfifo/11.t
===================================================================
--- head/contrib/pjdfstest/tests/mkfifo/11.t	(revision 272086)
+++ head/contrib/pjdfstest/tests/mkfifo/11.t	(revision 272087)
@@ -1,31 +1,31 @@
 #!/bin/sh
 # $FreeBSD: head/tools/regression/pjdfstest/tests/mkfifo/11.t 211352 2010-08-15 21:24:17Z pjd $
 
 desc="mkfifo returns ENOSPC if there are no free inodes on the file system on which the file is being created"
 
 dir=`dirname $0`
 . ${dir}/../misc.sh
 
 [ "${os}:${fs}" = "FreeBSD:UFS" ] || quick_exit
 
 echo "1..3"
 
 n0=`namegen`
 n1=`namegen`
 
 expect 0 mkdir ${n0} 0755
-n=`mdconfig -a -n -t malloc -s 256k`
-newfs /dev/md${n} >/dev/null
-mount /dev/md${n} ${n0}
+n=`mdconfig -a -n -t malloc -s 512k` || exit
+newfs /dev/md${n} >/dev/null || exit
+mount /dev/md${n} ${n0} || exit
 i=0
 while :; do
 	mkfifo ${n0}/${i} >/dev/null 2>&1
 	if [ $? -ne 0 ]; then
 		break
 	fi
 	i=`expr $i + 1`
 done
 expect ENOSPC mkfifo ${n0}/${n1} 0644
 umount /dev/md${n}
-mdconfig -d -u ${n}
+mdconfig -d -u ${n} || exit
 expect 0 rmdir ${n0}
Index: head/contrib/pjdfstest/tests/open/14.t
===================================================================
--- head/contrib/pjdfstest/tests/open/14.t	(revision 272086)
+++ head/contrib/pjdfstest/tests/open/14.t	(revision 272087)
@@ -1,32 +1,32 @@
 #!/bin/sh
 # $FreeBSD: head/tools/regression/pjdfstest/tests/open/14.t 211352 2010-08-15 21:24:17Z pjd $
 
 desc="open returns EROFS if the named file resides on a read-only file system, and the file is to be modified"
 
 dir=`dirname $0`
 . ${dir}/../misc.sh
 
 [ "${os}:${fs}" = "FreeBSD:UFS" ] || quick_exit
 
 echo "1..10"
 
 n0=`namegen`
 n1=`namegen`
 
 expect 0 mkdir ${n0} 0755
-n=`mdconfig -a -n -t malloc -s 1m`
-newfs /dev/md${n} >/dev/null
-mount /dev/md${n} ${n0}
+n=`mdconfig -a -n -t malloc -s 1m` || exit
+newfs /dev/md${n} >/dev/null || exit
+mount /dev/md${n} ${n0} || exit
 expect 0 create ${n0}/${n1} 0644
 expect 0 open ${n0}/${n1} O_WRONLY
 expect 0 open ${n0}/${n1} O_RDWR
 expect 0 open ${n0}/${n1} O_RDONLY,O_TRUNC
 mount -ur /dev/md${n}
 expect EROFS open ${n0}/${n1} O_WRONLY
 expect EROFS open ${n0}/${n1} O_RDWR
 expect EROFS open ${n0}/${n1} O_RDONLY,O_TRUNC
 mount -uw /dev/md${n}
 expect 0 unlink ${n0}/${n1}
 umount /dev/md${n}
-mdconfig -d -u ${n}
+mdconfig -d -u ${n} || exit
 expect 0 rmdir ${n0}
Index: head/contrib/pjdfstest/tests/open/15.t
===================================================================
--- head/contrib/pjdfstest/tests/open/15.t	(revision 272086)
+++ head/contrib/pjdfstest/tests/open/15.t	(revision 272087)
@@ -1,27 +1,27 @@
 #!/bin/sh
 # $FreeBSD: head/tools/regression/pjdfstest/tests/open/15.t 211352 2010-08-15 21:24:17Z pjd $
 
 desc="open returns EROFS when O_CREAT is specified and the named file would reside on a read-only file system"
 
 dir=`dirname $0`
 . ${dir}/../misc.sh
 
 [ "${os}:${fs}" = "FreeBSD:UFS" ] || quick_exit
 
 echo "1..5"
 
 n0=`namegen`
 n1=`namegen`
 
 expect 0 mkdir ${n0} 0755
-n=`mdconfig -a -n -t malloc -s 1m`
-newfs /dev/md${n} >/dev/null
-mount /dev/md${n} ${n0}
+n=`mdconfig -a -n -t malloc -s 1m` || exit
+newfs /dev/md${n} >/dev/null || exit
+mount /dev/md${n} ${n0} || exit
 expect 0 open ${n0}/${n1} O_RDONLY,O_CREAT 0644
 expect 0 unlink ${n0}/${n1}
 mount -ur /dev/md${n}
 expect EROFS open ${n0}/${n1} O_RDONLY,O_CREAT 0644
 mount -uw /dev/md${n}
 umount /dev/md${n}
-mdconfig -d -u ${n}
+mdconfig -d -u ${n} || exit
 expect 0 rmdir ${n0}
Index: head/contrib/pjdfstest/tests/open/19.t
===================================================================
--- head/contrib/pjdfstest/tests/open/19.t	(revision 272086)
+++ head/contrib/pjdfstest/tests/open/19.t	(revision 272087)
@@ -1,31 +1,31 @@
 #!/bin/sh
 # $FreeBSD: head/tools/regression/pjdfstest/tests/open/19.t 211352 2010-08-15 21:24:17Z pjd $
 
 desc="open returns ENOSPC when O_CREAT is specified, the file does not exist, and there are no free inodes on the file system on which the file is being created"
 
 dir=`dirname $0`
 . ${dir}/../misc.sh
 
 [ "${os}:${fs}" = "FreeBSD:UFS" ] || quick_exit
 
 echo "1..3"
 
 n0=`namegen`
 n1=`namegen`
 
 expect 0 mkdir ${n0} 0755
-n=`mdconfig -a -n -t malloc -s 256k`
-newfs /dev/md${n} >/dev/null
-mount /dev/md${n} ${n0}
+n=`mdconfig -a -n -t malloc -s 512k` || exit
+newfs /dev/md${n} >/dev/null || exit
+mount /dev/md${n} ${n0} || exit
 i=0
 while :; do
 	touch ${n0}/${i} >/dev/null 2>&1
 	if [ $? -ne 0 ]; then
 		break
 	fi
 	i=`expr $i + 1`
 done
 expect ENOSPC open ${n0}/${i} O_RDONLY,O_CREAT 0644
 umount /dev/md${n}
-mdconfig -d -u ${n}
+mdconfig -d -u ${n} || exit
 expect 0 rmdir ${n0}
Index: head/contrib/pjdfstest/tests/rename/15.t
===================================================================
--- head/contrib/pjdfstest/tests/rename/15.t	(revision 272086)
+++ head/contrib/pjdfstest/tests/rename/15.t	(revision 272087)
@@ -1,34 +1,34 @@
 #!/bin/sh
 # $FreeBSD: head/tools/regression/pjdfstest/tests/rename/15.t 211352 2010-08-15 21:24:17Z pjd $
 
 desc="rename returns EXDEV if the link named by 'to' and the file named by 'from' are on different file systems"
 
 dir=`dirname $0`
 . ${dir}/../misc.sh
 
 [ "${os}" = "FreeBSD" ] || quick_exit
 
 echo "1..23"
 
 n0=`namegen`
 n1=`namegen`
 n2=`namegen`
 
 expect 0 mkdir ${n0} 0755
-n=`mdconfig -a -n -t malloc -s 1m`
-newfs /dev/md${n} >/dev/null
-mount /dev/md${n} ${n0}
+n=`mdconfig -a -n -t malloc -s 1m` || exit
+newfs /dev/md${n} >/dev/null || exit
+mount /dev/md${n} ${n0} || exit
 
 for type in regular dir fifo block char socket symlink; do
 	create_file ${type} ${n0}/${n1}
 	expect EXDEV rename ${n0}/${n1} ${n2}
 	if [ "${type}" = "dir" ]; then
 		expect 0 rmdir ${n0}/${n1}
 	else
 		expect 0 unlink ${n0}/${n1}
 	fi
 done
 
 umount /dev/md${n}
-mdconfig -d -u ${n}
+mdconfig -d -u ${n} || exit
 expect 0 rmdir ${n0}
Index: head/contrib/pjdfstest/tests/rename/16.t
===================================================================
--- head/contrib/pjdfstest/tests/rename/16.t	(revision 272086)
+++ head/contrib/pjdfstest/tests/rename/16.t	(revision 272087)
@@ -1,32 +1,32 @@
 #!/bin/sh
 # $FreeBSD: head/tools/regression/pjdfstest/tests/rename/16.t 211352 2010-08-15 21:24:17Z pjd $
 
 desc="rename returns EROFS if the requested link requires writing in a directory on a read-only file system"
 
 dir=`dirname $0`
 . ${dir}/../misc.sh
 
 [ "${os}" = "FreeBSD" ] || quick_exit
 
 echo "1..8"
 
 n0=`namegen`
 n1=`namegen`
 n2=`namegen`
 
 expect 0 mkdir ${n0} 0755
-n=`mdconfig -a -n -t malloc -s 1m`
-newfs /dev/md${n} >/dev/null
-mount /dev/md${n} ${n0}
+n=`mdconfig -a -n -t malloc -s 1m` || exit
+newfs /dev/md${n} >/dev/null || exit
+mount /dev/md${n} ${n0} || exit
 expect 0 create ${n0}/${n1} 0644
 mount -ur /dev/md${n}
 
 expect EROFS rename ${n0}/${n1} ${n0}/${n2}
 expect EROFS rename ${n0}/${n1} ${n2}
 expect 0 create ${n2} 0644
 expect EROFS rename ${n2} ${n0}/${n2}
 expect 0 unlink ${n2}
 
 umount /dev/md${n}
-mdconfig -d -u ${n}
+mdconfig -d -u ${n} || exit
 expect 0 rmdir ${n0}
Index: head/contrib/pjdfstest/tests/rmdir/13.t
===================================================================
--- head/contrib/pjdfstest/tests/rmdir/13.t	(revision 272086)
+++ head/contrib/pjdfstest/tests/rmdir/13.t	(revision 272087)
@@ -1,22 +1,22 @@
 #!/bin/sh
 # $FreeBSD: head/tools/regression/pjdfstest/tests/rmdir/13.t 211352 2010-08-15 21:24:17Z pjd $
 
 desc="rmdir returns EBUSY if the directory to be removed is the mount point for a mounted file system"
 
 dir=`dirname $0`
 . ${dir}/../misc.sh
 
 [ "${os}" = "FreeBSD" ] || quick_exit
 
 echo "1..3"
 
 n0=`namegen`
 
 expect 0 mkdir ${n0} 0755
-n=`mdconfig -a -n -t malloc -s 1m`
-newfs /dev/md${n} >/dev/null
-mount /dev/md${n} ${n0}
+n=`mdconfig -a -n -t malloc -s 1m` || exit
+newfs /dev/md${n} >/dev/null || exit
+mount /dev/md${n} ${n0} || exit
 expect EBUSY rmdir ${n0}
 umount /dev/md${n}
-mdconfig -d -u ${n}
+mdconfig -d -u ${n} || exit
 expect 0 rmdir ${n0}
Index: head/contrib/pjdfstest/tests/rmdir/14.t
===================================================================
--- head/contrib/pjdfstest/tests/rmdir/14.t	(revision 272086)
+++ head/contrib/pjdfstest/tests/rmdir/14.t	(revision 272087)
@@ -1,27 +1,27 @@
 #!/bin/sh
 # $FreeBSD: head/tools/regression/pjdfstest/tests/rmdir/14.t 211352 2010-08-15 21:24:17Z pjd $
 
 desc="rmdir returns EROFS if the named file resides on a read-only file system"
 
 dir=`dirname $0`
 . ${dir}/../misc.sh
 
 [ "${os}:${fs}" = "FreeBSD:UFS" ] || quick_exit
 
 echo "1..5"
 
 n0=`namegen`
 n1=`namegen`
 
 expect 0 mkdir ${n0} 0755
-n=`mdconfig -a -n -t malloc -s 1m`
-newfs /dev/md${n} >/dev/null
-mount /dev/md${n} ${n0}
+n=`mdconfig -a -n -t malloc -s 1m` || exit
+newfs /dev/md${n} >/dev/null || exit
+mount /dev/md${n} ${n0} || exit
 expect 0 mkdir ${n0}/${n1} 0755
 mount -ur /dev/md${n}
 expect EROFS rmdir ${n0}/${n1}
 mount -uw /dev/md${n}
 expect 0 rmdir ${n0}/${n1}
 umount /dev/md${n}
-mdconfig -d -u ${n}
+mdconfig -d -u ${n} || exit
 expect 0 rmdir ${n0}
Index: head/contrib/pjdfstest/tests/symlink/10.t
===================================================================
--- head/contrib/pjdfstest/tests/symlink/10.t	(revision 272086)
+++ head/contrib/pjdfstest/tests/symlink/10.t	(revision 272087)
@@ -1,32 +1,32 @@
 #!/bin/sh
 # $FreeBSD: head/tools/regression/pjdfstest/tests/symlink/10.t 211352 2010-08-15 21:24:17Z pjd $
 
 desc="symlink returns EROFS if the file name2 would reside on a read-only file system"
 
 dir=`dirname $0`
 . ${dir}/../misc.sh
 
 [ "${os}:${fs}" = "FreeBSD:UFS" ] || quick_exit
 
 echo "1..7"
 
 n0=`namegen`
 n1=`namegen`
 n2=`namegen`
 
 expect 0 mkdir ${n0} 0755
-n=`mdconfig -a -n -t malloc -s 1m`
-newfs /dev/md${n} >/dev/null
-mount /dev/md${n} ${n0}
+n=`mdconfig -a -n -t malloc -s 1m` || exit
+newfs /dev/md${n} >/dev/null || exit
+mount /dev/md${n} ${n0} || exit
 
 expect 0 symlink test ${n0}/${n1}
 expect 0 unlink ${n0}/${n1}
 mount -ur /dev/md${n}
 expect EROFS symlink test ${n0}/${n1}
 mount -uw /dev/md${n}
 expect 0 symlink test ${n0}/${n1}
 expect 0 unlink ${n0}/${n1}
 
 umount /dev/md${n}
-mdconfig -d -u ${n}
+mdconfig -d -u ${n} || exit
 expect 0 rmdir ${n0}
Index: head/contrib/pjdfstest/tests/symlink/11.t
===================================================================
--- head/contrib/pjdfstest/tests/symlink/11.t	(revision 272086)
+++ head/contrib/pjdfstest/tests/symlink/11.t	(revision 272087)
@@ -1,31 +1,31 @@
 #!/bin/sh
 # $FreeBSD: head/tools/regression/pjdfstest/tests/symlink/11.t 211352 2010-08-15 21:24:17Z pjd $
 
 desc="symlink returns ENOSPC if there are no free inodes on the file system on which the symbolic link is being created"
 
 dir=`dirname $0`
 . ${dir}/../misc.sh
 
 [ "${os}:${fs}" = "FreeBSD:UFS" ] || quick_exit
 
 echo "1..3"
 
 n0=`namegen`
 n1=`namegen`
 
 expect 0 mkdir ${n0} 0755
-n=`mdconfig -a -n -t malloc -s 256k`
-newfs /dev/md${n} >/dev/null
-mount /dev/md${n} ${n0}
+n=`mdconfig -a -n -t malloc -s 512k` || exit
+newfs /dev/md${n} >/dev/null || exit
+mount /dev/md${n} ${n0} || exit
 i=0
 while :; do
 	ln -s test ${n0}/${i} >/dev/null 2>&1
 	if [ $? -ne 0 ]; then
 		break
 	fi
 	i=`expr $i + 1`
 done
 expect ENOSPC symlink test ${n0}/${n1}
 umount /dev/md${n}
-mdconfig -d -u ${n}
+mdconfig -d -u ${n} || exit
 expect 0 rmdir ${n0}
Index: head/contrib/pjdfstest/tests/truncate/10.t
===================================================================
--- head/contrib/pjdfstest/tests/truncate/10.t	(revision 272086)
+++ head/contrib/pjdfstest/tests/truncate/10.t	(revision 272087)
@@ -1,32 +1,32 @@
 #!/bin/sh
 # $FreeBSD: head/tools/regression/pjdfstest/tests/truncate/10.t 211352 2010-08-15 21:24:17Z pjd $
 
 desc="truncate returns EROFS if the named file resides on a read-only file system"
 
 dir=`dirname $0`
 . ${dir}/../misc.sh
 
 [ "${os}:${fs}" = "FreeBSD:UFS" ] || quick_exit
 
 echo "1..10"
 
 n0=`namegen`
 n1=`namegen`
 
 expect 0 mkdir ${n0} 0755
-n=`mdconfig -a -n -t malloc -s 1m`
-newfs /dev/md${n} >/dev/null
-mount /dev/md${n} ${n0}
+n=`mdconfig -a -n -t malloc -s 1m` || exit
+newfs /dev/md${n} >/dev/null || exit
+mount /dev/md${n} ${n0} || exit
 expect 0 create ${n0}/${n1} 0644
 expect 0 truncate ${n0}/${n1} 123
 expect 123 stat ${n0}/${n1} size
 mount -ur /dev/md${n}
 expect EROFS truncate ${n0}/${n1} 1234
 expect 123 stat ${n0}/${n1} size
 mount -uw /dev/md${n}
 expect 0 truncate ${n0}/${n1} 1234
 expect 1234 stat ${n0}/${n1} size
 expect 0 unlink ${n0}/${n1}
 umount /dev/md${n}
-mdconfig -d -u ${n}
+mdconfig -d -u ${n} || exit
 expect 0 rmdir ${n0}
Index: head/contrib/pjdfstest/tests/unlink/12.t
===================================================================
--- head/contrib/pjdfstest/tests/unlink/12.t	(revision 272086)
+++ head/contrib/pjdfstest/tests/unlink/12.t	(revision 272087)
@@ -1,27 +1,27 @@
 #!/bin/sh
 # $FreeBSD: head/tools/regression/pjdfstest/tests/unlink/12.t 211352 2010-08-15 21:24:17Z pjd $
 
 desc="unlink returns EROFS if the named file resides on a read-only file system"
 
 dir=`dirname $0`
 . ${dir}/../misc.sh
 
 [ "${os}:${fs}" = "FreeBSD:UFS" ] || quick_exit
 
 echo "1..5"
 
 n0=`namegen`
 n1=`namegen`
 
 expect 0 mkdir ${n0} 0755
-n=`mdconfig -a -n -t malloc -s 1m`
-newfs /dev/md${n} >/dev/null
-mount /dev/md${n} ${n0}
+n=`mdconfig -a -n -t malloc -s 1m` || exit
+newfs /dev/md${n} >/dev/null || exit
+mount /dev/md${n} ${n0} || exit
 expect 0 create ${n0}/${n1} 0644
 mount -ur /dev/md${n}
 expect EROFS unlink ${n0}/${n1}
 mount -uw /dev/md${n}
 expect 0 unlink ${n0}/${n1}
 umount /dev/md${n}
-mdconfig -d -u ${n}
+mdconfig -d -u ${n} || exit
 expect 0 rmdir ${n0}