From 3899f522f181b6c99ad37c09234bdaf7625f12fb Mon Sep 17 00:00:00 2001
From: Andrew Boie <andrew.p.boie@intel.com>
Date: Fri, 12 Oct 2012 15:23:40 -0700
Subject: [PATCH] init: load factory properties

These properties are typically set at device provisioning time
or in the factory. They contain unit-specific data that isn't
touched by software updates or factory data reset. Only
read-only properties can be read by this mechanism.

Change-Id: Ifff9184f039072c3c0ce99f825c3075afb524514
Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
---
 init/property_service.c | 21 ++++++++++++++-------
 1 file changed, 14 insertions(+), 7 deletions(-)

diff --git a/init/property_service.c b/init/property_service.c
index 6c71807aa..5d8be3b01 100755
--- a/init/property_service.c
+++ b/init/property_service.c
@@ -403,10 +403,13 @@ void get_property_workspace(int *fd, int *sz)
     *sz = pa_workspace.size;
 }
 
-static void load_properties(char *data)
+static void load_properties(char *data, char *prefix)
 {
     char *key, *value, *eol, *sol, *tmp;
+    size_t plen;
 
+    if (prefix)
+        plen = strlen(prefix);
     sol = data;
     while((eol = strchr(sol, '\n'))) {
         key = sol;
@@ -422,6 +425,9 @@ static void load_properties(char *data)
         tmp = value - 2;
         while((tmp > key) && isspace(*tmp)) *tmp-- = 0;
 
+        if (prefix && strncmp(key, prefix, plen))
+            continue;
+
         while(isspace(*value)) value++;
         tmp = eol - 2;
         while((tmp > value) && isspace(*tmp)) *tmp-- = 0;
@@ -430,7 +436,7 @@ static void load_properties(char *data)
     }
 }
 
-static void load_properties_from_file(const char *fn)
+static void load_properties_from_file(const char *fn, char *prefix)
 {
     char *data;
     unsigned sz;
@@ -438,7 +444,7 @@ static void load_properties_from_file(const char *fn)
     data = read_file(fn, &sz);
 
     if(data != 0) {
-        load_properties(data);
+        load_properties(data, prefix);
         free(data);
     }
 }
@@ -511,7 +517,7 @@ void property_init(void)
 
 void property_load_boot_defaults(void)
 {
-    load_properties_from_file(PROP_PATH_RAMDISK_DEFAULT);
+    load_properties_from_file(PROP_PATH_RAMDISK_DEFAULT, NULL);
 }
 
 int properties_inited(void)
@@ -526,7 +532,7 @@ static void load_override_properties() {
 
     ret = property_get("ro.debuggable", debuggable);
     if (ret && (strcmp(debuggable, "1") == 0)) {
-        load_properties_from_file(PROP_PATH_LOCAL_OVERRIDE);
+        load_properties_from_file(PROP_PATH_LOCAL_OVERRIDE, NULL);
     }
 #endif /* ALLOW_LOCAL_PROP_OVERRIDE */
 }
@@ -548,8 +554,9 @@ void start_property_service(void)
 {
     int fd;
 
-    load_properties_from_file(PROP_PATH_SYSTEM_BUILD);
-    load_properties_from_file(PROP_PATH_SYSTEM_DEFAULT);
+    load_properties_from_file(PROP_PATH_SYSTEM_BUILD, NULL);
+    load_properties_from_file(PROP_PATH_SYSTEM_DEFAULT, NULL);
+    load_properties_from_file(PROP_PATH_FACTORY, "ro.");
     load_override_properties();
     /* Read persistent properties after all default values have been loaded. */
     load_persistent_properties();