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Respect inmutable resolv.conf in the image

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In some instances, the content of the image may want to convey specific
resolv.conf settings. For instance, if unbound is installed, it's also
desirable to set resolv.conf to point to it.

Short circuit diskimage-builder's friendliness around resolv.conf files
by not dying in a fire if it finds the file to be immutable.

Change-Id: I88632fb79289681dcf95d32f39a0ad658ba39a60
This commit is contained in:
Monty Taylor 2014-04-25 16:24:04 -07:00
parent 1c07d4ba1a
commit 0c08692e75
1 changed files with 12 additions and 5 deletions
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7
lib/img-functions
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@ -91,12 +91,19 @@ function prepare_first_boot () {
function finalise_base () { function finalise_base () {
TARGET_ROOT=$TMP_MOUNT_PATH run_d cleanup TARGET_ROOT=$TMP_MOUNT_PATH run_d cleanup
# If the file has been set immutable, we probably want to keep it
if lsattr $TMP_MOUNT_PATH/etc/resolv.conf | grep '^....i' >/dev/null ; then
# We're keeping the contents of resolv.conf set in the elements,
# so remove the old saved file
sudo rm -f $TMP_MOUNT_PATH/etc/resolv.conf.ORIG
else
# Remove the resolv.conf we created above # Remove the resolv.conf we created above
sudo rm -f $TMP_MOUNT_PATH/etc/resolv.conf sudo rm -f $TMP_MOUNT_PATH/etc/resolv.conf
# Move the original back # Move the original back
if [ -L $TMP_MOUNT_PATH/etc/resolv.conf.ORIG ] || [ -f $TMP_MOUNT_PATH/etc/resolv.conf.ORIG ] ; then if [ -L $TMP_MOUNT_PATH/etc/resolv.conf.ORIG ] || [ -f $TMP_MOUNT_PATH/etc/resolv.conf.ORIG ] ; then
sudo mv $TMP_MOUNT_PATH/etc/resolv.conf.ORIG $TMP_MOUNT_PATH/etc/resolv.conf sudo mv $TMP_MOUNT_PATH/etc/resolv.conf.ORIG $TMP_MOUNT_PATH/etc/resolv.conf
fi fi
fi
} }
function compress_and_save_image () { function compress_and_save_image () {