implement redbend flashing

Change-Id: Icad93103ed2321ad8b6aecbbf2e0f2f8fe139c0f

bmlutils/Android.mk

@@ -3,6 +3,7 @@ ifeq ($(BOARD_USES_BMLUTILS),true)
 LOCAL_PATH := $(call my-dir)
 
 include $(CLEAR_VARS)
+LOCAL_CFLAGS += -DBOARD_BOOT_DEVICE=\"$(BOARD_BOOT_DEVICE)\"
 LOCAL_SRC_FILES := bmlutils.c
 LOCAL_MODULE := libbmlutils
 include $(BUILD_STATIC_LIBRARY)

bmlutils/bmlutils.c

@@ -1,4 +1,33 @@
+#include <ctype.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <getopt.h>
+#include <limits.h>
+#include <linux/input.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/reboot.h>
+#include <sys/types.h>
+#include <time.h>
+#include <unistd.h>
+
+#include <sys/wait.h>
+#include <sys/limits.h>
+#include <dirent.h>
+#include <sys/stat.h>
+
+#include <signal.h>
+#include <sys/wait.h>
+
+int
+__system(const char *command);
+
 int write_raw_image(const char* partition, const char* filename) {
-    // flash using redbend_ua here
-    return 0;
-}
+    char tmp[PATH_MAX];
+    if (0 != strcmp("boot", partition)) {
+        return -1;
+    }
+    sprintf(tmp, "/sbin/redbend_ua restore %s %s", filename, BOARD_BOOT_DEVICE);
+    return __system(tmp);
+}