grpc-blobs: add bios-settings-util helper
Add this helper script for bios-settings msvfud package so it doesn't
need to know where the bios settings file is stored.
Tested:
https://paste.googleplex.com/5940478543134720
Fusion-Link: N/A, the script is not used in existing presubmit platforms
Google-Bug-Id: 419102393
Change-Id: I3c9962dfa2cd714b792001cff7749348d4f2497a
Signed-off-by: Jinliang Wang <jinliangw@google.com>
diff --git a/recipes-phosphor/grpc-blobs/files/bios-settings-util b/recipes-phosphor/grpc-blobs/files/bios-settings-util
new file mode 100644
index 0000000..0e1ed7b
--- /dev/null
+++ b/recipes-phosphor/grpc-blobs/files/bios-settings-util
@@ -0,0 +1,96 @@
+#!/bin/bash
+
+readonly CONFIGURED_SETTINGS_FILE="/var/google/bios/configured-settings.txt"
+readonly REPORTED_SETTINGS_FILE="/var/google/bios/reported-settings.txt"
+
+# 10KB limit
+readonly FILE_SIZE_LIMIT=10240
+
+echo_err() {
+ echo 1>&2 "ERROR: $*"
+}
+
+show_usage() {
+ cat <<HERE
+Usage:
+ $0 getConfiguredSettings Read configured bios settings file from persist storage and return the file content through stdout
+ $0 storeConfiguredSettings settingsFile Store the bios settings file into persist storage
+ $0 getReportedSettings Read reported bios settings file from persist storage and return the file content through stdout
+HERE
+}
+
+get_configured_settings() {
+ cat "$CONFIGURED_SETTINGS_FILE"
+ exit $?
+}
+
+get_reported_settings() {
+ cat "$REPORTED_SETTINGS_FILE"
+ exit $?
+}
+
+store_configured_settings() {
+ local input_file="$1"
+
+ if [[ ! -f "$input_file" ]]; then
+ echo_err "Input bios settings file $input_file doesn't exist."
+ exit 1
+ fi
+
+ local file_size
+ file_size="$(stat -c%s "$input_file")"
+ if ((file_size > FILE_SIZE_LIMIT)); then
+ echo_err "file size $file_size exceeds $FILE_SIZE_LIMIT."
+ exit 1
+ fi
+
+ # We need /proc/1/root prefix to persist write in msvfud post install environment
+ local dest_file="/proc/1/root$CONFIGURED_SETTINGS_FILE"
+
+ local parent_dir
+ parent_dir="$(dirname $dest_file)"
+ mkdir -p "$parent_dir" || {
+ echo_err "Failed to mkdir $parent_dir"
+ exit 1
+ }
+
+ if cmp -s "$input_file" "$dest_file"; then
+ # Skip write if $input_file is the same as $dest_file
+ exit 0
+ fi
+
+ cp "$input_file" "${dest_file}.tmp" || {
+ echo_err "Failed to cp $input_file to ${dest_file}.tmp"
+ exit 1
+ }
+
+ # the replacement is atomic
+ mv "${dest_file}.tmp" "$dest_file" || {
+ echo_err "Failed to mv $input_file to ${dest_file}.tmp"
+ exit 1
+ }
+
+ exit 0
+}
+
+if [[ $# -eq 0 ]]; then
+ show_usage
+ exit 0
+fi
+
+if [[ $# -eq 1 ]]; then
+ if [[ "$1" == "getConfiguredSettings" ]]; then
+ get_configured_settings
+ elif [[ "$1" == "getReportedSettings" ]]; then
+ get_reported_settings
+ fi
+fi
+
+if [[ $# -eq 2 ]]; then
+ if [[ "$1" == "storeConfiguredSettings" ]]; then
+ store_configured_settings "$2"
+ fi
+fi
+
+show_usage
+exit 1
diff --git a/recipes-phosphor/grpc-blobs/grpc-blobs_git.bb b/recipes-phosphor/grpc-blobs/grpc-blobs_git.bb
index 07b428f..8bf52b2 100644
--- a/recipes-phosphor/grpc-blobs/grpc-blobs_git.bb
+++ b/recipes-phosphor/grpc-blobs/grpc-blobs_git.bb
@@ -20,3 +20,17 @@
SYSTEMD_SERVICE:${PN} += "grpc-blobs.service"
inherit meson pkgconfig systemd
+
+FILESEXTRAPATHS:prepend := "${THISDIR}/files:"
+
+SRC_URI:append = " \
+ file://bios-settings-util \
+"
+
+RDEPENDS:${PN} += " \
+ bash \
+"
+do_install:append() {
+ install -d ${D}${bindir}
+ install -m 0755 ${WORKDIR}/bios-settings-util ${D}${bindir}/
+}
