+ * pbuilder-user-mode-linux: Give warning when ran as root.

+  * Give more meaningful message when there is problem accessing the root
+    filesystem from inside user-mode-linux. (closes: #206292)

1 files changed, 8 insertions, 1 deletions

diff --git a/pbuilder-user-mode-linux b/pbuilder-user-mode-linux
index 616ab85..5e80149 100755
--- a/pbuilder-user-mode-linux
+++ b/pbuilder-user-mode-linux
@@ -60,7 +60,10 @@ ${UML_DEBUGMODE}
 
 mount -t proc /proc /proc
 mount -t tmpfs /tmp /tmp
-mount -t ext2 /dev/ubd/1 ${UML_CHROOT_MOUNTPOINT}
+if ! mount -t ext2 /dev/ubd/1 ${UML_CHROOT_MOUNTPOINT}; then
+  echo "E: Cannot mount /dev/ubd/1, is UML root image accessible as current user?"
+  exit 1
+fi
 export LOGNAME="${LOGNAME}"
 export HOME="${HOME}"
 hostname "${UML_HOSTNAME}"
@@ -121,6 +124,10 @@ EOF
 
     chmod a+x ${INSIDE_PBUILDER}
 
+    if [ $( id -u ) = 0 ]; then
+	echo "W: You are uid=0. Don't run UML as uid=0, it's not supported."
+    fi
+
     echo Invoking: "linux mem=${UML_MEM} eth0=${MY_ETH0} con0=fd:0,fd:1 con=pty root=/dev/root rootflags=/ rootfstype=hostfs ubd1=${PBUILDER_COW}${PBUILDER_UML_IMAGE} devfs=mount init=${INSIDE_PBUILDER} rw"
     if linux mem=${UML_MEM} eth0=${MY_ETH0} con0=fd:0,fd:1 con=pty root=/dev/root rootflags=/ rootfstype=hostfs ubd1="${PBUILDER_COW}${PBUILDER_UML_IMAGE}" devfs=mount init=${INSIDE_PBUILDER} rw ; then
 	UML_EXITCODE=$?