T5136: properly unmount filesystems after installation

(cherry picked from commit f34e9028252034cf17dbf380a2cded8bf14c71c2)

2 files changed, 31 insertions, 2 deletions

diff --git a/scripts/install/install-functions b/scripts/install/install-functions
index b3ec42c1..feeeb489 100755
--- a/scripts/install/install-functions
+++ b/scripts/install/install-functions
@@ -86,10 +86,10 @@ tolower () {
 }
 
 # Validates a user response.  Returns the response if valid.
-# Returns the default is the user just hits enter.  
+# Returns the default is the user just hits enter.
 # Returns nothing if not valid.  Default parameter is $1.
 # Options are in $2.  If options are defined return must be a member
-# of the enum. 
+# of the enum.
 get_response () {
   local ldefault=$(tolower "$1")
   local loptions=$(tolower "$2")
@@ -370,6 +370,26 @@ EOF
   return 1
 }
 
+# try to unmount. log any errors and return the appropriate status.
+# $1: arguments for umount
+try_unmount ()
+{
+  args="$*"
+  output=$(eval "umount $args 2>&1")
+  status=$?
+  if [ $status == 0 ]; then
+    return 0
+  fi
+  # error
+  cat <<EOF
+Error trying to unmount a partition/directory.
+Please see $INSTALL_LOG for details.
+EOF
+  lecho 'Error trying to unmount a partition/directory.'
+  lecho "umount $args\n$output"
+  return 1
+}
+
 # Find 2 drives of the same size.
 get_size_raid ()
 {
diff --git a/scripts/install/install-image-existing b/scripts/install/install-image-existing
index d00d7735..abbd1421 100755
--- a/scripts/install/install-image-existing
+++ b/scripts/install/install-image-existing
@@ -278,6 +278,15 @@ if [ -e "$DEF_GRUB" ]; then
   fi
 fi
 
+# unmount filesystems
+if ! try_unmount "--read-only $INST_ROOT $READ_ROOT"; then
+  rm -rf $REL_ROOT
+  failure_exit 'Failed to unmount new squashfs image.'
+fi
+
+# sync underlaying filesystems
+sync
+
 logger -p local3.warning -t "SystemImage" "System Image $NEWNAME has been added and made the default boot image"
 
 echo 'Done.'