futility: cmd_update: Add "system property" and '--sys_props' to override

When updating firmware, we may need to get some system environment
status, like which firmware slot was selected and boot (active), or
setting cookies so the next boot will be using right (updated) slot.

In verified boot, these status are manipulated by "system property"
using API Vb{Get,Set}SystemProperty{String,Int}. The user land tool is
`crossystem`.

In order to run the firmware updater for testing and debugging, we need
an easy way to toggle getting real system status, or fetch from
predefined values. A new 'system_property' structure is introduced
and included as part of `updater_config`.

Each property can be access by `get_system_property(property_type)`
function. If the value was not fetched yet, the function will call
corresponding 'getter' function defined in property and then cache it.

A new parameter '--sys_props` is also introduced so we can easily
override them from command line so the updater will not get status from
running system.

The --sys_props takes a list of integers, eliminated by space or comma.
For example,
 "1,2,3" => overrides [0]=1, [1]=2, [2]=3.
 "1 2,3" => overrides [0]=1, [1]=2, [2]=3.
 "1, ,3" => overrides [0]=1, [2]=3.

BUG=chromium:875551
TEST=make futil; futility update -i IMAGE
     tests/futility/run_test_scripts.sh $(pwd)/build/futility
BRANCH=None

Change-Id: Ia2e06a953da1480da9a94f7f397802caa7468efa
Signed-off-by: Hung-Te Lin <hungte@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/1188015

1 files changed, 13 insertions, 0 deletions

diff --git a/tests/futility/test_update.sh b/tests/futility/test_update.sh
index 7e2a142d..ca9c6f85 100755
--- a/tests/futility/test_update.sh
+++ b/tests/futility/test_update.sh
@@ -6,6 +6,19 @@
 me=${0##*/}
 TMP="$me.tmp"
 
+# Test --sys_props (primitive test needed for future updating tests).
+test_sys_props() {
+	! "${FUTILITY}" --debug update --sys_props "$*" |
+		sed -n 's/.*property\[\(.*\)].value = \(.*\)/\1,\2,/p' |
+		tr '\n' ' '
+}
+
+test "$(test_sys_props "1,2,3")" = "0,1, 1,2, 2,3, "
+test "$(test_sys_props "1 2 3")" = "0,1, 1,2, 2,3, "
+test "$(test_sys_props "1, 2,3 ")" = "0,1, 1,2, 2,3, "
+test "$(test_sys_props "   1,, 2")" = "0,1, 2,2, "
+test "$(test_sys_props " , 4,")" = "1,4, "
+
 # Test data files
 LINK_BIOS="${SCRIPTDIR}/data/bios_link_mp.bin"
 PEPPY_BIOS="${SCRIPTDIR}/data/bios_peppy_mp.bin"