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Allow RO rootfs and writeable stateful.

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BUG=9423
TEST=mount an image --safe, rootfs OK

Change-Id: I4bc48e742e2438a1d2cae17c752743e02bd124fd

Review URL: http://codereview.chromium.org/4974006
This commit is contained in:
Nick Sanders 2010-11-16 20:05:06 -08:00
parent d4993a7311
commit 867fde26b7
1 changed files with 14 additions and 2 deletions
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16
mount_gpt_image.sh
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@ -20,6 +20,8 @@ DEFINE_string board "$DEFAULT_BOARD" \
"The board for which the image was built." b
DEFINE_boolean read_only $FLAGS_FALSE \
"Mount in read only mode -- skips stateful items."
DEFINE_boolean safe $FLAGS_FALSE \
"Mount rootfs in read only mode."
DEFINE_boolean unmount $FLAGS_FALSE \
"Unmount previously mounted dir." u
DEFINE_string from "/dev/sdc" \
@ -64,9 +66,12 @@ function unmount_image() {
function get_usb_partitions() {
local ro_flag=""
local safe_flag=""
[ ${FLAGS_read_only} -eq ${FLAGS_TRUE} ] && ro_flag="-o ro"
[ ${FLAGS_read_only} -eq ${FLAGS_TRUE} -o \
${FLAGS_safe} -eq ${FLAGS_TRUE} ] && safe_flag="-o ro -t ext2"
sudo mount ${ro_flag} "${FLAGS_from}3" "${FLAGS_rootfs_mountpt}"
sudo mount ${safe_flag} "${FLAGS_from}3" "${FLAGS_rootfs_mountpt}"
sudo mount ${ro_flag} "${FLAGS_from}1" "${FLAGS_stateful_mountpt}"
if [[ -n "${FLAGS_esp_mountpt}" ]]; then
sudo mount ${ro_flag} "${FLAGS_from}12" "${FLAGS_esp_mountpt}"
@ -79,8 +84,15 @@ function get_gpt_partitions() {
# Mount the rootfs partition using a loopback device.
local offset=$(partoffset "${FLAGS_from}/${filename}" 3)
local ro_flag=""
local safe_flag=""
if [ ${FLAGS_read_only} -eq ${FLAGS_TRUE} ]; then
ro_flag="-o ro"
fi
if [ ${FLAGS_read_only} -eq ${FLAGS_TRUE} -o \
${FLAGS_safe} -eq ${FLAGS_TRUE} ]; then
safe_flag="-o ro -t ext2"
else
# Make sure any callers can actually mount and modify the fs
# if desired.
@ -88,7 +100,7 @@ function get_gpt_partitions() {
enable_rw_mount "${FLAGS_from}/${filename}" "$(( offset * 512 ))"
fi
sudo mount ${ro_flag} -o loop,offset=$(( offset * 512 )) \
sudo mount ${safe_flag} -o loop,offset=$(( offset * 512 )) \
"${FLAGS_from}/${filename}" "${FLAGS_rootfs_mountpt}"
# Mount the stateful partition using a loopback device.