potter: let oem script set hw properties from utags

rootdir/Android.mk

@@ -26,6 +26,14 @@ LOCAL_SRC_FILES    := etc/init.mmi.touch.sh
 LOCAL_MODULE_PATH  := $(TARGET_OUT_EXECUTABLES)
 include $(BUILD_PREBUILT)
 
+include $(CLEAR_VARS)
+LOCAL_MODULE       := init.oem.hw.sh
+LOCAL_MODULE_TAGS  := optional eng
+LOCAL_MODULE_CLASS := ETC
+LOCAL_SRC_FILES    := etc/init.oem.hw.sh
+LOCAL_MODULE_PATH  := $(TARGET_OUT_EXECUTABLES)
+include $(BUILD_PREBUILT)
+
 include $(CLEAR_VARS)
 LOCAL_MODULE       := init.qcom.ril.sh
 LOCAL_MODULE_TAGS  := optional eng

rootdir/etc/init.oem.hw.sh

@@ -0,0 +1,130 @@
+#!/system/bin/sh
+
+PATH=/sbin:/system/sbin:/system/bin:/system/xbin
+export PATH
+
+while getopts dpfr op;
+do
+	case $op in
+		d)  dbg_on=1;;
+		p)  populate_only=1;;
+		f)  dead_touch=1;;
+		r)  reset_touch=1;;
+	esac
+done
+shift $(($OPTIND-1))
+
+scriptname=${0##*/}
+hw_mp=/proc/hw
+config_mp=/proc/config
+reboot_utag=$hw_mp/.reboot
+touch_status_prop=hw.touch.status
+hw_cfg_file=hw_config.xml
+vhw_file=/system/etc/vhw.xml
+bp_file=/system/build.prop
+oem_file=/oem/oem.prop
+load_error=3
+need_to_reload=2
+reload_in_progress=1
+reload_done=0
+ver_utag=".version"
+version_fs="unknown"
+xml_version="unknown"
+device_params=""
+xml_file=""
+set -A prop_names
+set -A prop_overrides
+prop_names=(ro.product.device ro.product.name)
+
+debug()
+{
+	[ $dbg_on ] && echo "Debug: $*"
+}
+
+notice()
+{
+	echo "$*"
+	echo "$scriptname: $*" > /dev/kmsg
+}
+
+reload_utags()
+{
+	local mp=$1
+	local value
+	echo "1" > $mp/reload
+	value=$(cat $mp/reload)
+	while [ "$value" == "$reload_in_progress" ]; do
+		notice "waiting for loading to complete"
+		sleep 1;
+		value=$(cat $mp/reload)
+		notice "'$mp' current status [$value]"
+	done
+}
+
+procfs_wait_for_device()
+{
+	local __result=$1
+	local status
+	local mpi
+	local IFS=' '
+	while [ ! -f $hw_mp/reload ] || [ ! -f $config_mp/reload ]; do
+		notice "waiting for devices"
+		sleep 1;
+        done
+	for mpi in $hw_mp; do
+		status=$(cat $mpi/reload)
+		notice "mount point '$mpi' status [$status]"
+		if [ "$status" == "$need_to_reload" ]; then
+			notice "force $mpi reloading"
+			reload_utags $mpi
+		fi
+	done
+	for mpi in $hw_mp; do
+		status=$(cat $mpi/reload)
+		notice "$mpi reload is [$status]"
+		while [ "$status" != "$reload_done" ]; do
+			notice "waiting for loading to complete"
+			sleep 1;
+			status=$(cat $mpi/reload)
+		done
+	done
+	eval $__result=$status
+}
+
+
+
+set_ro_hw_properties()
+{
+	local utag_path
+	local utag_name
+	local prop_prefix
+	local utag_value
+	local verify
+	for hwtag in $(find $hw_mp -name '.system'); do
+		debug "path $hwtag has '.system' in its name"
+		prop_prefix=$(cat $hwtag/ascii)
+		verify=${prefix%.}
+		# esure property ends with '.'
+		if [ "$prop_prefix" == "$verify" ]; then
+			prop_prefix="$prop_prefix."
+			debug "added '.' at the end of [$prop_prefix]"
+
+                fi
+		utag_path=${hwtag%/*}
+		utag_name=${utag_path##*/}
+		utag_value=$(cat $utag_path/ascii)
+		setprop $prop_prefix$utag_name "$utag_value"
+		notice "ro.hw.$utag_name='$utag_value'"
+	done
+}
+
+# Main starts here
+IFS=$'\n'
+
+notice "initializing procfs"
+procfs_wait_for_device readiness
+
+set_ro_hw_properties
+
+return 0
+

sepolicy/oem-hw-sh.te

@@ -0,0 +1,17 @@
+type oem-hw-sh, domain;
+type oem-hw-sh_exec, exec_type, file_type;
+init_daemon_domain(oem-hw-sh)
+
+allow oem-hw-sh hw_block_device:blk_file { open read write };
+allow oem-hw-sh init:unix_stream_socket connectto;
+allow oem-hw-sh kmsg_device:chr_file { write open };
+allow oem-hw-sh proc:file { write getattr open read };
+allow oem-hw-sh property_socket:sock_file write;
+allow oem-hw-sh rootfs:file {entrypoint read open };
+allow oem-hw-sh self:capability dac_override;
+allow oem-hw-sh shell_exec:file { entrypoint read getattr };
+allow oem-hw-sh system_file:file execute_no_trans;
+allow oem-hw-sh system_prop:property_service set;
+allow oem-hw-sh toolbox_exec:file { execute execute_no_trans getattr open read };
+allow oem-hw-sh touch_prop:file { getattr open read };
+allow oem-hw-sh touch_prop:property_service set;