int mb__system_properties_init()
{
if (initialized) {
list_foreach(contexts, [](context_node* l) { l->reset_access(); });
return 0;
}
if (is_dir(property_filename)) {
if (!initialize_properties()) {
return -1;
}
if (!map_system_property_area(false, nullptr)) {
free_and_unmap_contexts();
return -1;
}
} else {
mb__system_property_area__ = map_prop_area(property_filename, true);
if (!mb__system_property_area__) {
return -1;
}
list_add(&contexts, "legacy_system_prop_area", mb__system_property_area__);
list_add_after_len(&prefixes, "*", contexts);
}
initialized = true;
return 0;
}
bool context_node::open(bool access_rw, bool* fsetxattr_failed) {
lock_.lock();
if (pa_) {
lock_.unlock();
return true;
}
char filename[PROP_FILENAME_MAX];
int len = snprintf(filename, sizeof(filename), "%s/%s", property_filename, context_);
if (len < 0 || len > PROP_FILENAME_MAX) {
lock_.unlock();
return false;
}
if (access_rw) {
pa_ = map_prop_area_rw(filename, context_, fsetxattr_failed);
} else {
pa_ = map_prop_area(filename
#if MB_ENABLE_COMPAT_PROPERTIES
, false
#endif
);
}
lock_.unlock();
return pa_;
}
static bool map_system_property_area(bool access_rw, bool* fsetxattr_failed) {
char filename[PROP_FILENAME_MAX];
int len = snprintf(filename, sizeof(filename),
"%s/properties_serial", property_filename);
if (len < 0 || len > PROP_FILENAME_MAX) {
mb__system_property_area__ = nullptr;
return false;
}
if (access_rw) {
mb__system_property_area__ =
map_prop_area_rw(filename, "u:object_r:properties_serial:s0", fsetxattr_failed);
} else {
mb__system_property_area__ = map_prop_area(filename, false);
}
return mb__system_property_area__;
}
int __system_properties_init()
{
return map_prop_area();
}
