From: Sangwan Kwon <sangwan.kwon@samsung.com>
Date: Fri, 17 Jan 2020 02:29:29 +0000 (+0900)
Subject: Get process executable path from pid
X-Git-Tag: accepted/tizen/unified/20200810.122954~92
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=9414659f27234357e5d0e231c02a1fc7cd49b51d;p=platform%2Fcore%2Fsecurity%2Fvist.git

Get process executable path from pid

Signed-off-by: Sangwan Kwon <sangwan.kwon@samsung.com>
---

diff --git a/src/vist/common/tests/process.cpp b/src/vist/common/tests/process.cpp
new file mode 100644
index 0000000..fea8f1f
--- /dev/null
+++ b/src/vist/common/tests/process.cpp
@@ -0,0 +1,41 @@
+/*
+ *  Copyright (c) 2020-present Samsung Electronics Co., Ltd All Rights Reserved
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License
+ */
+
+#include <gtest/gtest.h>
+
+#include <vist/process.hpp>
+
+#include <string>
+
+using namespace vist;
+
+TEST(ProcessTests, path_positive)
+{
+	auto name = Process::GetPath(Process::GetPid());
+	EXPECT_EQ("/usr/bin/vist-test", name);
+}
+
+TEST(ProcessTests, path_negative)
+{
+	bool raised = false;
+	try {
+		Process::GetPath(-1);
+	} catch(...) {
+		raised = true;
+	}
+
+	EXPECT_TRUE(raised);
+}
diff --git a/src/vist/process.hpp b/src/vist/process.hpp
new file mode 100644
index 0000000..b364587
--- /dev/null
+++ b/src/vist/process.hpp
@@ -0,0 +1,51 @@
+/*
+ *  Copyright (c) 2020-present Samsung Electronics Co., Ltd All Rights Reserved
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License
+ */
+
+#pragma once
+
+#include <vist/exception.hpp>
+
+#include <cstdio>
+#include <memory>
+#include <string>
+
+#include <errno.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+namespace vist {
+
+struct Process {
+	static pid_t GetPid()
+	{
+		return ::getpid();
+	}
+
+	static std::string GetPath(pid_t pid)
+	{
+		std::string cmdline = "/proc/" + std::to_string(pid) + "/exe";
+
+		/// c++17 std::filesystem::read_symlink
+		std::vector<char> buf(1024);
+		auto size = ::readlink(cmdline.c_str(), buf.data(), buf.size());
+		if (size == -1)
+			THROW(ErrCode::RuntimeError) << "Failed to get process path: " << errno;
+
+		return std::string(buf.begin(), buf.begin() + size);
+	}
+};
+
+} // namespace vist