~RpmEnvironmentManager() {
// If we had set the environment, clean it up afterward.
if (!config_.is_initialized()) {
unsetEnvVar("RPM_CONFIGDIR");
}
if (callback_ != nullptr) {
rpmlogSetCallback(callback_, nullptr);
callback_ = nullptr;
}
}
TEST_F(ProcessTests, test_envVar) {
auto val = getEnvVar("GTEST_OSQUERY");
EXPECT_FALSE(val);
EXPECT_FALSE(val.is_initialized());
EXPECT_TRUE(setEnvVar("GTEST_OSQUERY", "true"));
val = getEnvVar("GTEST_OSQUERY");
EXPECT_FALSE(!val);
EXPECT_TRUE(val.is_initialized());
EXPECT_EQ(*val, "true");
EXPECT_TRUE(unsetEnvVar("GTEST_OSQUERY"));
val = getEnvVar("GTEST_OSQUERY");
EXPECT_FALSE(val);
EXPECT_FALSE(val.is_initialized());
}
/* Takes the command struct and takes approproate action.
* Will either execute a shell command, program, or output an error message.
* @params: command - a struct representing the command
* @return: false is the command was note found, true otherwise.
*/
bool processCommand(command_t* command, char* pEnv[]){
char* defaultDir = getenv("HOME");
if( strcmp(command->name, "cd") == CMP_OK) {
if( command->argc == 1 ) {
changeDirectory(defaultDir);
} else {
changeDirectory(command->argv[1]);
}
} else if( strcmp(command->name,"help") == CMP_OK) {
help();
} else if( strcmp(command->name, "senv") == CMP_OK) {
char* envName = NULL;
char* envVal = NULL;
if( command->argc > 1) {
envName = command->argv[1];
}
if( command->argc > 2) {
envVal = command->argv[2];
}
setEnvVar(envName,envVal);
} else if( strcmp(command->name, "usenv") == CMP_OK) {
char* envName = NULL;
if( command->argc > 1) {
envName = command->argv[1];
}
unsetEnvVar(envName);
} else if( strcmp(command->name, "genv") == CMP_OK) {
char* envName = NULL;
if( command-> argc > 1) {
envName = command->argv[1];
}
getEnvVar(envName);
} else {
char* filePath = getFilePath(command->name);
if(filePath != NULL) {
pid_t pid_command = fork();
if(pid_command < CHILD) { // ERROR
fprintf(stderr, "Fork failure!\n");
} else if ( pid_command == CHILD) {
if(command->isBg) {
freopen("/dev/null","w",stdout);
freopen("/dev/null","w",stderr);
}
execve(filePath, command->argv, pEnv);
} else {
if(!command->isBg) {
int stat;
waitpid(pid_command, &stat, 0);
} else {
printf("Process ID: %d\n", pid_command);
}
}
} else if(strcmp(command->name, "quit") == CMP_OK ||
strcmp(command->name, "exit") == CMP_OK ||
strcmp(command->name, "q") == CMP_OK ) {
return false;
} else {
printf("%s: Command not found\n", command->name);
return false;
}
}
return true;
}
std::shared_ptr<PlatformProcess> PlatformProcess::launchExtension(
const std::string &exec_path,
const std::string &extension,
const std::string &extensions_socket,
const std::string &extensions_timeout,
const std::string &extensions_interval,
const std::string &verbose) {
::STARTUPINFOA si = {0};
::PROCESS_INFORMATION pi = {0};
si.cb = sizeof(si);
// To prevent errant double quotes from altering the intended arguments for
// argv, we strip them out completely.
std::stringstream argv_stream;
argv_stream << "\"osquery extension: "
<< boost::replace_all_copy(extension, "\"", "") << "\" ";
argv_stream << "--socket \"" << extensions_socket << "\" ";
argv_stream << "--timeout " << extensions_timeout << " ";
argv_stream << "--interval " << extensions_interval << " ";
if (verbose == "true") {
argv_stream << "--verbose";
}
// We don't directly use argv.c_str() as the value for lpCommandLine in
// CreateProcess since that argument requires a modifiable buffer. So,
// instead, we off-load the contents of argv into a vector which will have its
// backing memory as modifiable.
std::string argv = argv_stream.str();
std::vector<char> mutable_argv(argv.begin(), argv.end());
mutable_argv.push_back('\0');
// In POSIX, this environment variable is set to the child's process ID. But
// that is not easily accomplishable on Windows and provides no value since
// this is never used elsewhere in the core.
if (!setEnvVar("OSQUERY_EXTENSION", "1")) {
return std::shared_ptr<PlatformProcess>();
}
BOOL status = ::CreateProcessA(exec_path.c_str(),
&mutable_argv[0],
NULL,
NULL,
TRUE,
0,
NULL,
NULL,
&si,
&pi);
unsetEnvVar("OSQUERY_EXTENSION");
if (!status) {
return std::shared_ptr<PlatformProcess>();
}
auto process = std::make_shared<PlatformProcess>(pi.hProcess);
::CloseHandle(pi.hThread);
::CloseHandle(pi.hProcess);
return process;
}
std::shared_ptr<PlatformProcess> PlatformProcess::launchWorker(
const std::string &exec_path, int argc, char **argv) {
::STARTUPINFOA si = {0};
::PROCESS_INFORMATION pi = {0};
si.cb = sizeof(si);
std::stringstream argv_stream;
std::stringstream handle_stream;
// The HANDLE exposed to the child process is currently limited to only having
// SYNCHRONIZE and PROCESS_QUERY_LIMITED_INFORMATION capabilities. The
// SYNCHRONIZE permissions allows for WaitForSingleObject.
// PROCESS_QUERY_LIMITED_INFORMATION allows for the ability to use the
// GetProcessId and GetExitCodeProcess API functions.
HANDLE hLauncherProcess =
::OpenProcess(SYNCHRONIZE | PROCESS_QUERY_LIMITED_INFORMATION,
TRUE,
GetCurrentProcessId());
if (hLauncherProcess == NULL) {
return std::shared_ptr<PlatformProcess>();
}
handle_stream << hLauncherProcess;
std::string handle = handle_stream.str();
// In the POSIX version, the environment variable OSQUERY_WORKER is set to the
// string form of the child process' process ID. However, this is not easily
// doable on Windows. Since the value does not appear to be used by the rest
// of osquery, we currently just set it to '1'.
//
// For the worker case, we also set another environment variable,
// OSQUERY_LAUNCHER. OSQUERY_LAUNCHER stores the string form of a HANDLE to
// the current process. This is mostly used for detecting the death of the
// launcher process in WatcherWatcherRunner::start
if (!setEnvVar("OSQUERY_WORKER", "1") ||
!setEnvVar("OSQUERY_LAUNCHER", handle.c_str())) {
::CloseHandle(hLauncherProcess);
return std::shared_ptr<PlatformProcess>();
}
// Since Windows does not accept a char * array for arguments, we have to
// build one as a string. Therefore, we need to make sure that special
// characters are not present that would obstruct the parsing of arguments.
// For now, we strip out all double quotes. If the an entry in argv has
// spaces, we will put double-quotes around the entry.
//
// NOTE: This is extremely naive and will break the moment complexities are
// involved... Windows command line argument parsing is extremely
// nitpicky and is different in behavior than POSIX argv parsing.
//
// We don't directly use argv.c_str() as the value for lpCommandLine in
// CreateProcess since that argument requires a modifiable buffer. So,
// instead, we off-load the contents of argv into a vector which will have its
// backing memory as modifiable.
for (size_t i = 0; i < argc; i++) {
std::string component(argv[i]);
if (component.find(" ") != std::string::npos) {
boost::replace_all(component, "\"", "\\\"");
argv_stream << "\"" << component << "\" ";
} else {
argv_stream << component << " ";
}
}
std::string cmdline = argv_stream.str();
std::vector<char> mutable_argv(cmdline.begin(), cmdline.end());
mutable_argv.push_back('\0');
BOOL status = ::CreateProcessA(exec_path.c_str(),
&mutable_argv[0],
NULL,
NULL,
TRUE,
0,
NULL,
NULL,
&si,
&pi);
unsetEnvVar("OSQUERY_WORKER");
unsetEnvVar("OSQUERY_LAUNCHER");
::CloseHandle(hLauncherProcess);
if (!status) {
return std::shared_ptr<PlatformProcess>();
}
auto process = std::make_shared<PlatformProcess>(pi.hProcess);
::CloseHandle(pi.hThread);
::CloseHandle(pi.hProcess);
return process;
}
