Merge "init: Ignore "ro." restrictions when reading prop files" am: 86f38d56b8
am: 0cb6e46c18
Change-Id: I14f46ba9b1f3340155f64162faa8566532900290
diff --git a/init/property_service.cpp b/init/property_service.cpp
index 76638b8..4bc857a 100644
--- a/init/property_service.cpp
+++ b/init/property_service.cpp
@@ -39,6 +39,7 @@
#define _REALLY_INCLUDE_SYS__SYSTEM_PROPERTIES_H_
#include <sys/_system_properties.h>
+#include <map>
#include <memory>
#include <queue>
#include <vector>
@@ -442,8 +443,8 @@
}
// This returns one of the enum of PROP_SUCCESS or PROP_ERROR*.
-uint32_t HandlePropertySet(const std::string& name, const std::string& value,
- const std::string& source_context, const ucred& cr, std::string* error) {
+uint32_t CheckPermissions(const std::string& name, const std::string& value,
+ const std::string& source_context, const ucred& cr, std::string* error) {
if (!IsLegalPropertyName(name)) {
*error = "Illegal property name";
return PROP_ERROR_INVALID_NAME;
@@ -456,7 +457,6 @@
return PROP_ERROR_HANDLE_CONTROL_MESSAGE;
}
- HandleControlMessage(name.c_str() + 4, value, cr.pid);
return PROP_SUCCESS;
}
@@ -475,6 +475,21 @@
return PROP_ERROR_INVALID_VALUE;
}
+ return PROP_SUCCESS;
+}
+
+// This returns one of the enum of PROP_SUCCESS or PROP_ERROR*.
+uint32_t HandlePropertySet(const std::string& name, const std::string& value,
+ const std::string& source_context, const ucred& cr, std::string* error) {
+ if (auto ret = CheckPermissions(name, value, source_context, cr, error); ret != PROP_SUCCESS) {
+ return ret;
+ }
+
+ if (StartsWith(name, "ctl.")) {
+ HandleControlMessage(name.c_str() + 4, value, cr.pid);
+ return PROP_SUCCESS;
+ }
+
// sys.powerctl is a special property that is used to make the device reboot. We want to log
// any process that sets this property to be able to accurately blame the cause of a shutdown.
if (name == "sys.powerctl") {
@@ -579,13 +594,15 @@
}
}
-static bool load_properties_from_file(const char *, const char *);
+static bool load_properties_from_file(const char*, const char*,
+ std::map<std::string, std::string>*);
/*
* Filter is used to decide which properties to load: NULL loads all keys,
* "ro.foo.*" is a prefix match, and "ro.foo.bar" is an exact match.
*/
-static void LoadProperties(char* data, const char* filter, const char* filename) {
+static void LoadProperties(char* data, const char* filter, const char* filename,
+ std::map<std::string, std::string>* properties) {
char *key, *value, *eol, *sol, *tmp, *fn;
size_t flen = 0;
@@ -624,7 +641,7 @@
while (isspace(*key)) key++;
}
- load_properties_from_file(fn, key);
+ load_properties_from_file(fn, key, properties);
} else {
value = strchr(key, '=');
@@ -651,12 +668,19 @@
continue;
}
- uint32_t result = 0;
ucred cr = {.pid = 1, .uid = 0, .gid = 0};
std::string error;
- result = HandlePropertySet(key, value, context, cr, &error);
- if (result != PROP_SUCCESS) {
- LOG(ERROR) << "Unable to set property '" << key << "' to '" << value
+ if (CheckPermissions(key, value, context, cr, &error) == PROP_SUCCESS) {
+ auto it = properties->find(key);
+ if (it == properties->end()) {
+ (*properties)[key] = value;
+ } else if (it->second != value) {
+ LOG(WARNING) << "Overriding previous 'ro.' property '" << key << "':'"
+ << it->second << "' with new value '" << value << "'";
+ it->second = value;
+ }
+ } else {
+ LOG(ERROR) << "Do not have permissions to set '" << key << "' to '" << value
<< "' in property file '" << filename << "': " << error;
}
}
@@ -665,7 +689,8 @@
// Filter is used to decide which properties to load: NULL loads all keys,
// "ro.foo.*" is a prefix match, and "ro.foo.bar" is an exact match.
-static bool load_properties_from_file(const char* filename, const char* filter) {
+static bool load_properties_from_file(const char* filename, const char* filter,
+ std::map<std::string, std::string>* properties) {
Timer t;
auto file_contents = ReadFile(filename);
if (!file_contents) {
@@ -675,7 +700,7 @@
}
file_contents->push_back('\n');
- LoadProperties(file_contents->data(), filter, filename);
+ LoadProperties(file_contents->data(), filter, filename, properties);
LOG(VERBOSE) << "(Loading properties from " << filename << " took " << t << ".)";
return true;
}
@@ -698,7 +723,15 @@
static void load_override_properties() {
if (ALLOW_LOCAL_PROP_OVERRIDE) {
- load_properties_from_file("/data/local.prop", NULL);
+ std::map<std::string, std::string> properties;
+ load_properties_from_file("/data/local.prop", nullptr, &properties);
+ for (const auto& [name, value] : properties) {
+ std::string error;
+ if (PropertySet(name, value, &error) != PROP_SUCCESS) {
+ LOG(ERROR) << "Could not set '" << name << "' to '" << value
+ << "' in /data/local.prop: " << error;
+ }
+ }
}
}
@@ -835,24 +868,33 @@
void property_load_boot_defaults() {
// TODO(b/117892318): merge prop.default and build.prop files into one
- // TODO(b/122864654): read the prop files from all partitions and then
- // resolve the duplication by their origin so that RO and non-RO properties
- // have a consistent overriding order.
- if (!load_properties_from_file("/system/etc/prop.default", NULL)) {
+ // We read the properties and their values into a map, in order to always allow properties
+ // loaded in the later property files to override the properties in loaded in the earlier
+ // property files, regardless of if they are "ro." properties or not.
+ std::map<std::string, std::string> properties;
+ if (!load_properties_from_file("/system/etc/prop.default", nullptr, &properties)) {
// Try recovery path
- if (!load_properties_from_file("/prop.default", NULL)) {
+ if (!load_properties_from_file("/prop.default", nullptr, &properties)) {
// Try legacy path
- load_properties_from_file("/default.prop", NULL);
+ load_properties_from_file("/default.prop", nullptr, &properties);
}
}
- load_properties_from_file("/product/build.prop", NULL);
- load_properties_from_file("/product_services/build.prop", NULL);
- load_properties_from_file("/odm/default.prop", NULL);
- load_properties_from_file("/vendor/default.prop", NULL);
- load_properties_from_file("/system/build.prop", NULL);
- load_properties_from_file("/odm/build.prop", NULL);
- load_properties_from_file("/vendor/build.prop", NULL);
- load_properties_from_file("/factory/factory.prop", "ro.*");
+ load_properties_from_file("/system/build.prop", nullptr, &properties);
+ load_properties_from_file("/vendor/default.prop", nullptr, &properties);
+ load_properties_from_file("/vendor/build.prop", nullptr, &properties);
+ load_properties_from_file("/odm/default.prop", nullptr, &properties);
+ load_properties_from_file("/odm/build.prop", nullptr, &properties);
+ load_properties_from_file("/product/build.prop", nullptr, &properties);
+ load_properties_from_file("/product_services/build.prop", nullptr, &properties);
+ load_properties_from_file("/factory/factory.prop", "ro.*", &properties);
+
+ for (const auto& [name, value] : properties) {
+ std::string error;
+ if (PropertySet(name, value, &error) != PROP_SUCCESS) {
+ LOG(ERROR) << "Could not set '" << name << "' to '" << value
+ << "' while loading .prop files" << error;
+ }
+ }
property_initialize_ro_product_props();
property_derive_build_fingerprint();