ueventd: Allow pattern matching to find external firmware handler
Only the exact same devpath uevent can launch external handler specified
in ueventd.rc. So, you should specify all possible devpaths, even
firmware with different filenames on the same device. Pattern mactching
can be used to simplify this.
Test: atest CtsInitTestCases
Signed-off-by: Suchang Woo <suchang.woo@samsung.com>
Change-Id: If3b7a2cabb8055bf4b768d928f0fc0012da3c177
diff --git a/init/firmware_handler.cpp b/init/firmware_handler.cpp
index ba7e6bd..bdc2922 100644
--- a/init/firmware_handler.cpp
+++ b/init/firmware_handler.cpp
@@ -17,6 +17,7 @@
#include "firmware_handler.h"
#include <fcntl.h>
+#include <fnmatch.h>
#include <glob.h>
#include <pwd.h>
#include <signal.h>
@@ -46,6 +47,20 @@
namespace android {
namespace init {
+namespace {
+bool PrefixMatch(const std::string& pattern, const std::string& path) {
+ return android::base::StartsWith(path, pattern);
+}
+
+bool FnMatch(const std::string& pattern, const std::string& path) {
+ return fnmatch(pattern.c_str(), path.c_str(), 0) == 0;
+}
+
+bool EqualMatch(const std::string& pattern, const std::string& path) {
+ return pattern == path;
+}
+} // namespace
+
static void LoadFirmware(const std::string& firmware, const std::string& root, int fw_fd,
size_t fw_size, int loading_fd, int data_fd) {
// Start transfer.
@@ -66,6 +81,22 @@
return access("/dev/.booting", F_OK) == 0;
}
+ExternalFirmwareHandler::ExternalFirmwareHandler(std::string devpath, uid_t uid,
+ std::string handler_path)
+ : devpath(std::move(devpath)), uid(uid), handler_path(std::move(handler_path)) {
+ auto wildcard_position = this->devpath.find('*');
+ if (wildcard_position != std::string::npos) {
+ if (wildcard_position == this->devpath.length() - 1) {
+ this->devpath.pop_back();
+ match = std::bind(PrefixMatch, this->devpath, std::placeholders::_1);
+ } else {
+ match = std::bind(FnMatch, this->devpath, std::placeholders::_1);
+ }
+ } else {
+ match = std::bind(EqualMatch, this->devpath, std::placeholders::_1);
+ }
+}
+
FirmwareHandler::FirmwareHandler(std::vector<std::string> firmware_directories,
std::vector<ExternalFirmwareHandler> external_firmware_handlers)
: firmware_directories_(std::move(firmware_directories)),
@@ -160,7 +191,7 @@
std::string FirmwareHandler::GetFirmwarePath(const Uevent& uevent) const {
for (const auto& external_handler : external_firmware_handlers_) {
- if (external_handler.devpath == uevent.path) {
+ if (external_handler.match(uevent.path)) {
LOG(INFO) << "Launching external firmware handler '" << external_handler.handler_path
<< "' for devpath: '" << uevent.path << "' firmware: '" << uevent.firmware
<< "'";