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// Copyright The OpenTelemetry Authors
// SPDX-License-Identifier: Apache-2.0
#include <gtest/gtest.h>
#include <stdint.h>
#include <fstream>
#include <string>
#include <vector>
#ifdef _MSC_VER
// clang-format off
# include <process.h>
# include <windows.h>
# include <psapi.h>
# define getpid _getpid
// clang-format on
#else
# include <sys/types.h>
# include <unistd.h>
# include <cstdio>
#endif
#include "opentelemetry/resource_detectors/detail/process_detector_utils.h"
TEST(ProcessDetectorUtilsTest, FormFilePath)
{
int32_t pid = 1234;
std::string cmdline_path = opentelemetry::resource_detector::detail::FormFilePath(pid, "cmdline");
std::string exe_path = opentelemetry::resource_detector::detail::FormFilePath(pid, "exe");
EXPECT_EQ(cmdline_path, "/proc/1234/cmdline");
EXPECT_EQ(exe_path, "/proc/1234/exe");
}
TEST(ProcessDetectorUtilsTest, ExtractCommandWithArgs)
{
std::string filename{"test_command_args.txt"};
{
std::ofstream outfile(filename, std::ios::binary);
const char raw_data[] = "test_command\0arg1\0arg2\0arg3\0";
outfile.write(raw_data, sizeof(raw_data) - 1);
}
std::vector<std::string> args =
opentelemetry::resource_detector::detail::ExtractCommandWithArgs(filename);
EXPECT_EQ(args, (std::vector<std::string>{"test_command", "arg1", "arg2", "arg3"}));
std::remove(filename.c_str()); // Cleanup
}
TEST(ProcessDetectorUtilsTest, EmptyCommandWithArgsFile)
{
std::string filename{"empty_command_args.txt"};
std::ofstream outfile(filename, std::ios::binary);
outfile.close();
std::vector<std::string> args =
opentelemetry::resource_detector::detail::ExtractCommandWithArgs(filename);
EXPECT_TRUE(args.empty());
std::remove(filename.c_str()); // Cleanup
}
TEST(ProcessDetectorUtilsTest, GetExecutablePathTest)
{
int32_t pid = getpid();
std::string path;
#ifdef _MSC_VER
HANDLE hProcess =
OpenProcess(PROCESS_QUERY_INFORMATION | PROCESS_VM_READ, FALSE, static_cast<DWORD>(pid));
if (!hProcess)
{
path = std::string();
}
else
{
WCHAR wbuffer[MAX_PATH];
DWORD len = GetProcessImageFileNameW(hProcess, wbuffer, MAX_PATH);
CloseHandle(hProcess);
if (len == 0)
{
path = std::string();
}
else
{
int size_needed = WideCharToMultiByte(CP_UTF8, 0, wbuffer, len, NULL, 0, NULL, NULL);
std::string utf8_path(size_needed, 0);
WideCharToMultiByte(CP_UTF8, 0, wbuffer, len, &utf8_path[0], size_needed, NULL, NULL);
path = utf8_path;
}
}
#else
std::string exe_path = opentelemetry::resource_detector::detail::FormFilePath(pid, "exe");
char buffer[4096];
ssize_t len = readlink(exe_path.c_str(), buffer, sizeof(buffer) - 1);
if (len != -1)
{
buffer[len] = '\0';
path = std::string(buffer);
}
else
{
path = std::string();
}
#endif
std::string expected_path = opentelemetry::resource_detector::detail::GetExecutablePath(pid);
EXPECT_EQ(path, expected_path);
}
TEST(ProcessDetectorUtilsTest, CommandTest)
{
int32_t pid = getpid();
std::string command;
#ifdef _MSC_VER
int argc = 0;
LPWSTR *argvW = CommandLineToArgvW(GetCommandLineW(), &argc);
if (argvW && argc > 0)
{
int size_needed = WideCharToMultiByte(CP_UTF8, 0, argvW[0], -1, NULL, 0, NULL, NULL);
if (size_needed > 0)
{
std::string arg(size_needed - 1, 0);
WideCharToMultiByte(CP_UTF8, 0, argvW[0], -1, &arg[0], size_needed, NULL, NULL);
command = arg;
}
LocalFree(argvW);
}
else
{
command = std::string();
}
#else
std::string command_line_path =
opentelemetry::resource_detector::detail::FormFilePath(pid, "cmdline");
std::ifstream command_line_file(command_line_path, std::ios::in | std::ios::binary);
std::getline(command_line_file, command, '\0');
#endif
std::vector<std::string> expected_command_with_args =
opentelemetry::resource_detector::detail::GetCommandWithArgs(pid);
std::string expected_command;
if (!expected_command_with_args.empty())
{
expected_command = expected_command_with_args[0];
}
EXPECT_EQ(command, expected_command);
}
TEST(ProcessDetectorUtilsTest, GetCommandWithArgsTest)
{
int32_t pid = getpid();
std::vector<std::string> args;
#ifdef _MSC_VER
int argc = 0;
LPWSTR *argvW = CommandLineToArgvW(GetCommandLineW(), &argc);
if (!argvW)
{
args = {};
}
else
{
for (int i = 0; i < argc; i++)
{
// Convert UTF-16 to UTF-8
int size_needed = WideCharToMultiByte(CP_UTF8, 0, argvW[i], -1, NULL, 0, NULL, NULL);
if (size_needed > 0)
{
std::string arg(size_needed - 1, 0);
WideCharToMultiByte(CP_UTF8, 0, argvW[i], -1, &arg[0], size_needed, NULL, NULL);
args.push_back(arg);
}
}
}
LocalFree(argvW);
#else
std::string command_line_path =
opentelemetry::resource_detector::detail::FormFilePath(pid, "cmdline");
args = opentelemetry::resource_detector::detail::ExtractCommandWithArgs(command_line_path);
#endif
std::vector<std::string> expected_args =
opentelemetry::resource_detector::detail::GetCommandWithArgs(pid);
EXPECT_EQ(args, expected_args);
}
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