feat: add app-identifier for convenient

Signed-off-by: ComixHe <heyuming@deepin.org>

apps/CMakeLists.txt

@@ -1,3 +1,4 @@
 add_subdirectory(dde-application-manager)
 add_subdirectory(app-launch-helper)
 add_subdirectory(app-update-notifier)
+add_subdirectory(app-identifier)

apps/app-identifier/CMakeLists.txt

@@ -0,0 +1 @@
+add_subdirectory(src)

apps/app-identifier/src/CMakeLists.txt

@@ -0,0 +1,15 @@
+set(BIN_NAME app-identifier)
+
+add_executable(${BIN_NAME} main.cpp)
+
+target_link_libraries(${BIN_NAME} PRIVATE
+    Qt${QT_VERSION_MAJOR}::Core
+    Qt${QT_VERSION_MAJOR}::DBus
+)
+
+target_include_directories(${BIN_NAME} PRIVATE
+    ${PROJECT_SOURCE_DIR}/src
+    ${PROJECT_BINARY_DIR}/src
+)
+
+install(TARGETS ${BIN_NAME} DESTINATION ${CMAKE_INSTALL_BINDIR})

apps/app-identifier/src/main.cpp

@@ -0,0 +1,69 @@
+// SPDX-FileCopyrightText: 2024 UnionTech Software Technology Co., Ltd.
+//
+// SPDX-License-Identifier: LGPL-3.0-or-later
+
+#include <QCoreApplication>
+#include <QCommandLineOption>
+#include <QCommandLineParser>
+#include <QDBusMessage>
+
+#include "global.h"
+
+int main(int argc, char *argv[])
+{
+    QCoreApplication app{argc, argv};
+    QCoreApplication::setApplicationName("app-identifier");
+    QCoreApplication::setApplicationVersion("1.0");
+
+    QCommandLineParser parser;
+    parser.setApplicationDescription("Identify in what capacity the process is running.");
+    parser.addHelpOption();
+    parser.addVersionOption();
+    parser.addPositionalArgument("PIDs", "PIDs to identify.", "[pid1 pid2 pid3 ...]");
+
+    parser.process(app);
+    auto PIDs = parser.positionalArguments();
+    if (PIDs.isEmpty()) {
+        return 0;
+    }
+
+    auto slice = PIDs.first().split(' ', Qt::SkipEmptyParts);
+    QList<pid_t> PIDList{};
+    std::transform(slice.cbegin(), slice.cend(), std::back_inserter(PIDList), [](const QString &pid) {
+        bool ok{true};
+        auto result = pid.toInt(&ok);
+        if (!ok) {
+            qFatal() << "failed to convert:" << pid;
+        }
+
+        return static_cast<pid_t>(result);
+    });
+
+    auto con = QDBusConnection::sessionBus();
+    std::for_each(PIDList.cbegin(), PIDList.cend(), [&con](pid_t pid) {
+        auto pidfd = pidfd_open(pid, 0);
+        if (pidfd == -1) {
+            qFatal() << "failed to open pidfd:" << std::strerror(errno);
+        }
+
+        auto msg = QDBusMessage::createMethodCall(
+            DDEApplicationManager1ServiceName, DDEApplicationManager1ObjectPath, ApplicationManager1Interface, "Identify");
+        msg.setArguments({QVariant::fromValue(QDBusUnixFileDescriptor{pidfd})});
+
+        auto reply = con.call(msg);
+        if (reply.type() != QDBusMessage::ReplyMessage) {
+            qWarning() << "failed to Identify process" << pid << reply.errorMessage();
+            return;
+        }
+
+        auto appID = reply.arguments().first().toString();
+        if (!appID.isEmpty()) {
+            qInfo() << "The capacity of process" << pid << "is:" << appID;
+            return;
+        }
+
+        qWarning() << "failed to get appID of process" << pid;
+    });
+
+    return 0;
+}

src/global.h

@@ -23,6 +23,7 @@
 #include <QUuid>
 #include <QLoggingCategory>
 #include <sys/stat.h>
+#include <sys/syscall.h>
 #include "constant.h"
 #include "config.h"
 
@@ -652,4 +653,9 @@ inline QString getObjectPathFromAppId(const QString &appId)
     return QString{DDEApplicationManager1ObjectPath} + "/" + QUuid::createUuid().toString(QUuid::Id128);
 }
 
+inline int pidfd_open(pid_t pid, uint flags)
+{
+    return syscall(SYS_pidfd_open, pid, flags);
+}
+
 #endif

tests/ut_applicationmanager.cpp

@@ -2,26 +2,20 @@
 //
 // SPDX-License-Identifier: LGPL-3.0-or-later
 
-#include "dbus/applicationmanager1service.h"
-#include "dbus/applicationservice.h"
-#include "cgroupsidentifier.h"
-#include "constant.h"
-#include "dbus/instanceadaptor.h"
 #include <gtest/gtest.h>
 #include <QDBusConnection>
 #include <QSharedPointer>
 #include <sys/syscall.h>
 #include <QProcess>
 #include <thread>
-#include <chrono>
 #include <QDBusUnixFileDescriptor>
 
-namespace {
-int pidfd_open(pid_t pid, uint flags)
-{
-    return syscall(SYS_pidfd_open, pid, flags);
-}
-}  // namespace
+#include "dbus/applicationmanager1service.h"
+#include "dbus/applicationservice.h"
+#include "cgroupsidentifier.h"
+#include "constant.h"
+#include "dbus/instanceadaptor.h"
+#include "global.h"
 
 class TestApplicationManager : public testing::Test
 {