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boinc/samples/vboxwrapper/vbox.cpp

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// This file is part of BOINC.
// http://boinc.berkeley.edu
// Copyright (C) 2010-2012 University of California
//
// BOINC is free software; you can redistribute it and/or modify it
// under the terms of the GNU Lesser General Public License
// as published by the Free Software Foundation,
// either version 3 of the License, or (at your option) any later version.
//
// BOINC is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
// See the GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with BOINC. If not, see <http://www.gnu.org/licenses/>.
#ifdef _WIN32
#include "boinc_win.h"
#include "win_util.h"
#else
#include <sys/wait.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <stdio.h>
#include <stdlib.h>
#include <vector>
#include <string>
#include <fstream>
#include <sstream>
#include <stdexcept>
#include <unistd.h>
#endif
using std::string;
#if defined(_MSC_VER)
#define getcwd _getcwd
#endif
#include "diagnostics.h"
#include "filesys.h"
#include "parse.h"
#include "str_util.h"
#include "str_replace.h"
#include "util.h"
#include "error_numbers.h"
#include "procinfo.h"
#include "network.h"
#include "boinc_api.h"
#include "floppyio.h"
#include "vboxwrapper.h"
#include "vbox.h"
VBOX_VM::VBOX_VM() {
virtualbox_version.clear();
pFloppy = NULL;
vm_master_name.clear();
vm_name.clear();
vm_cpu_count.clear();
vm_disk_controller_type.clear();
vm_disk_controller_model.clear();
os_name.clear();
memory_size_mb.clear();
image_filename.clear();
floppy_image_filename.clear();
job_duration = 0.0;
fraction_done_filename.clear();
suspended = false;
network_suspended = false;
online = false;
crashed = false;
enable_cern_dataformat = false;
enable_shared_directory = false;
enable_floppyio = false;
enable_remotedesktop = false;
register_only = false;
enable_network = false;
pf_guest_port = 0;
pf_host_port = 0;
headless = true;
#ifndef _WIN32
vm_pid = 0;
#else
vm_pid_handle = 0;
#endif
// Initialize default values
vm_disk_controller_type = "ide";
vm_disk_controller_model = "PIIX4";
}
VBOX_VM::~VBOX_VM() {
if (pFloppy) {
delete pFloppy;
pFloppy = NULL;
}
#ifdef _WIN32
if (vm_pid_handle) {
CloseHandle(vm_pid_handle);
vm_pid_handle = NULL;
}
#endif
}
int VBOX_VM::initialize() {
int rc = 0;
string virtualbox_install_directory;
string old_path;
string new_path;
string virtualbox_user_home;
string command;
string output;
APP_INIT_DATA aid;
bool force_sandbox = false;
char buf[256];
boinc_get_init_data_p(&aid);
get_install_directory(virtualbox_install_directory);
// Prep the environment so we can execute the vboxmanage application
//
// TODO: Fix for non-Windows environments if we ever find another platform
// where vboxmanage is not already in the search path
#ifdef _WIN32
if (!virtualbox_install_directory.empty())
{
old_path = getenv("PATH");
new_path = virtualbox_install_directory + ";" + old_path;
if (!SetEnvironmentVariable("PATH", const_cast<char*>(new_path.c_str()))) {
fprintf(
stderr,
"%s Failed to modify the search path.\n",
vboxwrapper_msg_prefix(buf, sizeof(buf))
);
}
}
#endif
// On *nix style systems, VirtualBox expects that there is a home directory specified
// by environment variable. When it doesn't exist it attempts to store logging information
// in root's home directory. Bad things happen if the process isn't owned by root.
//
// if the HOME environment variable is missing force VirtualBox to use a directory it
// has a reasonable chance of writing log files too.
#ifndef _WIN32
if (NULL == getenv("HOME")) {
force_sandbox = true;
}
#endif
// Set the location in which the VirtualBox Configuration files can be
// stored for this instance.
if (aid.using_sandbox || force_sandbox) {
virtualbox_user_home = aid.project_dir;
virtualbox_user_home += "/../virtualbox";
if (!boinc_file_exists(virtualbox_user_home.c_str())) boinc_mkdir(virtualbox_user_home.c_str());
#ifdef _WIN32
if (!SetEnvironmentVariable("VBOX_USER_HOME", const_cast<char*>(virtualbox_user_home.c_str()))) {
fprintf(
stderr,
"%s Failed to modify the search path.\n",
vboxwrapper_msg_prefix(buf, sizeof(buf))
);
}
// Launch VboxSVC.exe before going any further. if we don't, it'll be launched by
// svchost.exe with its environment block which will not contain the reference
// to VBOX_USER_HOME which is required for running in the BOINC account-based
// sandbox.
STARTUPINFO si;
PROCESS_INFORMATION pi;
string command;
memset(&si, 0, sizeof(si));
memset(&pi, 0, sizeof(pi));
si.cb = sizeof(STARTUPINFO);
si.dwFlags |= STARTF_FORCEOFFFEEDBACK | STARTF_USESHOWWINDOW;
si.wShowWindow = SW_HIDE;
command = "\"" + virtualbox_install_directory + "\\VBoxSVC.exe\" -Embedding";
if (!CreateProcess(NULL, (LPTSTR)command.c_str(), NULL, NULL, TRUE, CREATE_NO_WINDOW, NULL, NULL, &si, &pi)) {
fprintf(
stderr,
"%s Creating VBoxSVC.exe failed! (%d).\n",
vboxwrapper_msg_prefix(buf, sizeof(buf)),
GetLastError()
);
}
if (pi.hThread) CloseHandle(pi.hThread);
if (pi.hProcess) CloseHandle(pi.hProcess);
#else
// putenv does not copy its input buffer, so we must use setenv
if (setenv("VBOX_USER_HOME", const_cast<char*>(virtualbox_user_home.c_str()), 1)) {
fprintf(
stderr,
"%s Failed to modify the VBOX_USER_HOME path.\n",
vboxwrapper_msg_prefix(buf, sizeof(buf))
);
}
#endif
}
// Record the VirtualBox version information for later use.
command = "--version ";
rc = vbm_popen(command, output, "version check");
// Remove \r or \n from the output spew
string::iterator iter = output.begin();
while (iter != output.end()) {
if (*iter == '\r' || *iter == '\n') {
iter = output.erase(iter);
} else {
++iter;
}
}
virtualbox_version = "VirtualBox " + output;
return rc;
}
int VBOX_VM::run(double elapsed_time) {
int retval;
if (!is_registered()) {
if (is_hdd_registered()) {
// Handle the case where a previous instance of the same projects VM
// was already initialized for the current slot directory but aborted
// while the task was suspended and unloaded from memory.
retval = deregister_stale_vm();
if (retval) return retval;
}
retval = register_vm();
if (retval) return retval;
}
// The user has requested that we exit after registering the VM, so return an
// error to stop further processing.
if (register_only) return ERR_FOPEN;
// If we are restarting an already registered VM, then the vm_name variable
// will be empty right now, so populate it with the master name so all of the
// various other functions will work.
vm_name = vm_master_name;
// Check to see if the VM is already in a running state, if so, poweroff.
poll(false);
if (online) {
poweroff();
}
// If our last checkpoint time is greater than 0, restore from the previously
// saved snapshot
if (elapsed_time) {
restoresnapshot();
}
// Start the VM
retval = start();
if (retval) return retval;
return 0;
}
int VBOX_VM::start() {
string command;
string output;
double timeout;
char buf[256];
int retval;
fprintf(
stderr,
"%s Starting VM.\n",
vboxwrapper_msg_prefix(buf, sizeof(buf))
);
command = "startvm \"" + vm_name + "\"";
if (headless) {
command += " --type headless";
}
retval = vbm_popen(command, output, "start VM");
if (retval) return retval;
// Wait for up to 5 minutes for the VM to switch states. A system
// under load can take a while. Since the poll function can wait for up
// to 45 seconds to execute a command we need to make this time based instead
// of interation based.
timeout = dtime() + 300;
do {
poll(false);
if (online) break;
boinc_sleep(1.0);
} while (timeout >= dtime());
if (online) {
fprintf(
stderr,
"%s Successfully started VM.\n",
vboxwrapper_msg_prefix(buf, sizeof(buf))
);
retval = BOINC_SUCCESS;
} else {
fprintf(
stderr,
"%s VM did not start within 5 minutes, aborting job.\n",
vboxwrapper_msg_prefix(buf, sizeof(buf))
);
retval = ERR_EXEC;
}
return retval;
}
int VBOX_VM::stop() {
string command;
string output;
char buf[256];
int retval = 0;
fprintf(
stderr,
"%s Stopping VM.\n",
vboxwrapper_msg_prefix(buf, sizeof(buf))
);
if (online) {
command = "controlvm \"" + vm_name + "\" savestate";
retval = vbm_popen(command, output, "stop VM", true, false);
poll(false);
if (!online) {
fprintf(
stderr,
"%s Successfully stopped VM.\n",
vboxwrapper_msg_prefix(buf, sizeof(buf))
);
retval = BOINC_SUCCESS;
} else {
fprintf(
stderr,
"%s VM did not stop when requested.\n",
vboxwrapper_msg_prefix(buf, sizeof(buf))
);
retval = ERR_EXEC;
}
}
return retval;
}
int VBOX_VM::poweroff() {
string command;
string output;
char buf[256];
int retval = 0;
fprintf(
stderr,
"%s Powering off VM.\n",
vboxwrapper_msg_prefix(buf, sizeof(buf))
);
if (online) {
command = "controlvm \"" + vm_name + "\" poweroff";
retval = vbm_popen(command, output, "poweroff VM", true, false);
poll(false);
if (!online) {
fprintf(
stderr,
"%s Successfully powered off VM.\n",
vboxwrapper_msg_prefix(buf, sizeof(buf))
);
retval = BOINC_SUCCESS;
} else {
fprintf(
stderr,
"%s VM did not power off when requested.\n",
vboxwrapper_msg_prefix(buf, sizeof(buf))
);
retval = ERR_EXEC;
}
}
return retval;
}
int VBOX_VM::pause() {
string command;
string output;
int retval;
command = "controlvm \"" + vm_name + "\" pause";
retval = vbm_popen(command, output, "pause VM");
if (retval) return retval;
suspended = true;
return 0;
}
int VBOX_VM::resume() {
string command;
string output;
int retval;
command = "controlvm \"" + vm_name + "\" resume";
retval = vbm_popen(command, output, "resume VM");
if (retval) return retval;
suspended = false;
return 0;
}
int VBOX_VM::createsnapshot(double elapsed_time) {
string command;
string output;
char buf[256];
int retval;
fprintf(
stderr,
"%s Creating new snapshot for VM.\n",
vboxwrapper_msg_prefix(buf, sizeof(buf))
);
// Pause VM - Try and avoid the live snapshot and trigger an online
// snapshot instead.
pause();
// Create new snapshot
sprintf(buf, "%d", (int)elapsed_time);
command = "snapshot \"" + vm_name + "\" ";
command += "take boinc_";
command += buf;
retval = vbm_popen(command, output, "create new snapshot", true, true, 0);
if (retval) return retval;
// Resume VM
resume();
// Set the suspended flag back to false before deleting the stale
// snapshot
poll(false);
// Delete stale snapshot(s), if one exists
cleanupsnapshots(false);
fprintf(
stderr,
"%s Checkpoint completed.\n",
vboxwrapper_msg_prefix(buf, sizeof(buf))
);
return 0;
}
int VBOX_VM::cleanupsnapshots(bool delete_active) {
string command;
string output;
string line;
string uuid;
size_t eol_pos;
size_t eol_prev_pos;
size_t uuid_start;
size_t uuid_end;
char buf[256];
int retval;
// Enumerate snapshot(s)
command = "snapshot \"" + vm_name + "\" ";
command += "list ";
retval = vbm_popen(command, output, "enumerate snapshot(s)");
if (retval) return retval;
// Output should look a little like this:
// Name: Snapshot 2 (UUID: 1751e9a6-49e7-4dcc-ab23-08428b665ddf)
// Name: Snapshot 3 (UUID: 92fa8b35-873a-4197-9d54-7b6b746b2c58)
// Name: Snapshot 4 (UUID: c049023a-5132-45d5-987d-a9cfadb09664) *
//
eol_prev_pos = 0;
eol_pos = output.find("\n");
while (eol_pos != string::npos) {
line = output.substr(eol_prev_pos, eol_pos - eol_prev_pos);
// This VM does not yet have any snapshots
if (line.find("does not have any snapshots") != string::npos) break;
// The * signifies that it is the active snapshot and one we do not want to delete
if (!delete_active && (line.find("*") != string::npos)) break;
uuid_start = line.find("(UUID: ");
if (uuid_start != string::npos) {
// We can parse the virtual machine ID from the line
uuid_start += 7;
uuid_end = line.find(")", uuid_start);
uuid = line.substr(uuid_start, uuid_end - uuid_start);
fprintf(
stderr,
"%s Deleting stale snapshot.\n",
vboxwrapper_msg_prefix(buf, sizeof(buf))
);
// Delete stale snapshot, if one exists
command = "snapshot \"" + vm_name + "\" ";
command += "delete \"";
command += uuid;
command += "\" ";
vbm_popen(command, output, "delete stale snapshot", true, false, 0);
}
eol_prev_pos = eol_pos + 1;
eol_pos = output.find("\n", eol_prev_pos);
}
return 0;
}
int VBOX_VM::restoresnapshot() {
string command;
string output;
char buf[256];
int retval;
fprintf(
stderr,
"%s Restore from previously saved snapshot.\n",
vboxwrapper_msg_prefix(buf, sizeof(buf))
);
command = "snapshot \"" + vm_name + "\" ";
command += "restorecurrent ";
retval = vbm_popen(command, output, "restore current snapshot");
if (retval) return retval;
fprintf(
stderr,
"%s Restore completed.\n",
vboxwrapper_msg_prefix(buf, sizeof(buf))
);
return 0;
}
void VBOX_VM::cleanup() {
poweroff();
deregister_vm(true);
// Give time enough for external processes to finish the cleanup process
boinc_sleep(5.0);
}
void VBOX_VM::poll(bool log_state) {
char buf[256];
string command;
string output;
string vmstate;
size_t vmstate_start;
size_t vmstate_end;
command = "showvminfo \"" + vm_name + "\" ";
command += "--machinereadable ";
if (vbm_popen(command, output, "VM state", false, false) == 0) {
vmstate_start = output.find("VMState=\"");
if (vmstate_start != string::npos) {
vmstate_start += 9;
vmstate_end = output.find("\"", vmstate_start);
vmstate = output.substr(vmstate_start, vmstate_end - vmstate_start);
// VirtualBox Documentation suggests that that a VM is running when its
// machine state is between MachineState_FirstOnline and MachineState_LastOnline
// which as of this writing is 5 and 17.
//
// VboxManage's source shows more than that though:
// see: http://www.virtualbox.org/browser/trunk/src/VBox/Frontends/VBoxManage/VBoxManageInfo.cpp
//
// So for now, go with what VboxManage is reporting.
//
if (vmstate == "running") {
online = true;
suspended = false;
} else if (vmstate == "paused") {
online = true;
suspended = true;
} else if (vmstate == "starting") {
online = true;
} else if (vmstate == "stopping") {
online = true;
} else if (vmstate == "saving") {
online = true;
} else if (vmstate == "restoring") {
online = true;
} else if (vmstate == "livesnapshotting") {
online = true;
} else if (vmstate == "deletingsnapshotlive") {
online = true;
} else if (vmstate == "deletingsnapshotlivepaused") {
online = true;
} else if (vmstate == "aborted") {
online = false;
crashed = true;
} else if (vmstate == "gurumeditation") {
online = false;
crashed = true;
} else {
online = false;
if (log_state) {
fprintf(
stderr,
"%s VM is no longer is a running state. It is in '%s'.\n",
vboxwrapper_msg_prefix(buf, sizeof(buf)),
vmstate.c_str()
);
}
}
}
}
}
// Attempt to detect any condition that would prevent VirtualBox from running a VM properly, like:
// 1. The DCOM service not being started on Windows
// 2. Vboxmanage not being able to communicate with vboxsvc for some reason
// 3. VirtualBox driver not loaded for the current Linux kernel.
//
// Luckly both of the above conditions can be detected by attempting to detect the host information
// via vboxmanage and it is cross platform.
//
bool VBOX_VM::is_system_ready() {
string command;
string output;
bool rc = true;
command = "list hostinfo ";
if (vbm_popen(command, output, "host info", false, false) == 0) {
if (output.find("Processor count:") == string::npos) {
rc = false;
}
if (output.find("WARNING: The vboxdrv kernel module is not loaded.") != string::npos) {
rc = false;
}
}
return rc;
}
bool VBOX_VM::is_registered() {
string command;
string output;
command = "showvminfo \"" + vm_master_name + "\" ";
command += "--machinereadable ";
if (vbm_popen(command, output, "registration", false, false) == 0) {
if (output.find("VBOX_E_OBJECT_NOT_FOUND") == string::npos) {
// Error message not found in text
return true;
}
}
return false;
}
bool VBOX_VM::is_hdd_registered() {
string command;
string output;
string virtual_machine_root_dir;
get_slot_directory(virtual_machine_root_dir);
command = "showhdinfo \"" + virtual_machine_root_dir + "/" + image_filename + "\" ";
if (vbm_popen(command, output, "hdd registration", false, false) == 0) {
if ((output.find("VBOX_E_FILE_ERROR") == string::npos) && (output.find("VBOX_E_OBJECT_NOT_FOUND") == string::npos)) {
// Error message not found in text
return true;
}
}
return false;
}
bool VBOX_VM::is_extpack_installed() {
string command;
string output;
command = "list extpacks";
if (vbm_popen(command, output, "extpack detection", false, false) == 0) {
if ((output.find("Oracle VM VirtualBox Extension Pack") != string::npos) && (output.find("VBoxVRDP") != string::npos)) {
return true;
}
}
return false;
}
int VBOX_VM::register_vm() {
string command;
string output;
string virtual_machine_slot_directory;
APP_INIT_DATA aid;
char buf[256];
int retval;
boinc_get_init_data_p(&aid);
get_slot_directory(virtual_machine_slot_directory);
// Reset VM name in case it was changed while deregistering a stale VM
//
vm_name = vm_master_name;
fprintf(
stderr,
"%s Registering VM. (%s) \n",
vboxwrapper_msg_prefix(buf, sizeof(buf)),
vm_name.c_str()
);
// Create and register the VM
//
command = "createvm ";
command += "--name \"" + vm_name + "\" ";
command += "--basefolder \"" + virtual_machine_slot_directory + "\" ";
command += "--ostype \"" + os_name + "\" ";
command += "--register";
retval = vbm_popen(command, output, "register");
if (retval) return retval;
// Tweak the VM from it's default configuration
//
fprintf(
stderr,
"%s Modifying VM.\n",
vboxwrapper_msg_prefix(buf, sizeof(buf))
);
command = "modifyvm \"" + vm_name + "\" ";
command += "--cpus " + vm_cpu_count + " ";
command += "--memory " + memory_size_mb + " ";
command += "--acpi on ";
command += "--ioapic on ";
command += "--boot1 disk ";
command += "--boot2 none ";
command += "--boot3 none ";
command += "--boot4 none ";
command += "--nic1 nat ";
command += "--natdnsproxy1 on ";
command += "--cableconnected1 off ";
retval = vbm_popen(command, output, "modify");
if (retval) return retval;
// Only perform hardware acceleration check on 32-bit VM types, 64-bit VM types require it.
//
if (os_name.find("_64") == std::string::npos) {
// Check to see if the processor supports hardware acceleration for virtualization
// If it doesn't, disable the use of it in VirtualBox. Multi-core jobs require hardware
// acceleration and actually override this setting.
//
if ((vm_cpu_count == "1") ||
(!strstr(aid.host_info.p_features, "vmx") && !strstr(aid.host_info.p_features, "svm"))) {
fprintf(
stderr,
"%s Disabling hardware acceleration support for virtualization.\n",
vboxwrapper_msg_prefix(buf, sizeof(buf))
);
command = "modifyvm \"" + vm_name + "\" ";
command += "--hwvirtex off ";
retval = vbm_popen(command, output, "VT-x/AMD-V support");
if (retval) return retval;
}
}
// Add storage controller to VM
//
fprintf(
stderr,
"%s Adding storage controller to VM.\n",
vboxwrapper_msg_prefix(buf, sizeof(buf))
);
command = "storagectl \"" + vm_name + "\" ";
command += "--name \"Hard Disk Controller\" ";
command += "--add \"" + vm_disk_controller_type + "\" ";
command += "--controller \"" + vm_disk_controller_model + "\" ";
retval = vbm_popen(command, output, "add storage controller (fixed disk)");
if (retval) return retval;
// Add storage controller for a floppy device if desired
//
if (enable_floppyio) {
command = "storagectl \"" + vm_name + "\" ";
command += "--name \"Floppy Controller\" ";
command += "--add floppy ";
retval = vbm_popen(command, output, "add storage controller (floppy)");
if (retval) return retval;
}
// Adding virtual hard drive to VM
//
fprintf(
stderr,
"%s Adding virtual disk drive to VM.\n",
vboxwrapper_msg_prefix(buf, sizeof(buf))
);
command = "storageattach \"" + vm_name + "\" ";
command += "--storagectl \"Hard Disk Controller\" ";
command += "--port 0 ";
command += "--device 0 ";
command += "--type hdd ";
command += "--setuuid \"\" ";
command += "--medium \"" + virtual_machine_slot_directory + "/" + image_filename + "\" ";
retval = vbm_popen(command, output, "storage attach (fixed disk)");
if (retval) return retval;
// Adding virtual floppy disk drive to VM
//
if (enable_floppyio) {
// Put in place the FloppyIO abstraction
//
// NOTE: This creates the floppy.img file at runtime for use by the VM.
//
pFloppy = new FloppyIO(floppy_image_filename.c_str());
if (!pFloppy->ready()) {
fprintf(
stderr,
"%s Creating virtual floppy image failed.\n"
"%s Error Code '%d' Error Message '%s'\n",
vboxwrapper_msg_prefix(buf, sizeof(buf)),
vboxwrapper_msg_prefix(buf, sizeof(buf)),
pFloppy->error,
pFloppy->errorStr.c_str()
);
return ERR_FWRITE;
}
fprintf(
stderr,
"%s Adding virtual floppy disk drive to VM.\n",
vboxwrapper_msg_prefix(buf, sizeof(buf))
);
command = "storageattach \"" + vm_name + "\" ";
command += "--storagectl \"Floppy Controller\" ";
command += "--port 0 ";
command += "--device 0 ";
command += "--medium \"" + virtual_machine_slot_directory + "/" + floppy_image_filename + "\" ";
retval = vbm_popen(command, output, "storage attach (floppy disk)");
if (retval) return retval;
}
// Enable the network adapter if a network connection is required.
//
if (enable_network) {
set_network_access(true);
// If the VM wants to open up a port through the VirtualBox virtual
// network firewall/nat do that here.
//
if (pf_guest_port) {
if (!pf_host_port) {
retval = get_port_forwarding_port();
if (retval) return retval;
}
fprintf(
stderr,
"%s Enabling VM firewall rules.\n",
vboxwrapper_msg_prefix(buf, sizeof(buf))
);
// Add new firewall rule
//
sprintf(buf, "vboxwrapper,tcp,127.0.0.1,%d,,%d", pf_host_port, pf_guest_port);
command = "modifyvm \"" + vm_name + "\" ";
command += "--natpf1 \"" + string(buf) + "\" ";
retval = vbm_popen(command, output, "add updated port forwarding rule");
if(retval) return retval;
}
}
// If the VM wants to enable remote desktop for the VM do it here
//
if (enable_remotedesktop) {
fprintf(
stderr,
"%s Enabling remote desktop for VM.\n",
vboxwrapper_msg_prefix(buf, sizeof(buf))
);
if (!is_extpack_installed()) {
fprintf(
stderr,
"%s Required extension pack not installed, remote desktop not enabled.\n",
vboxwrapper_msg_prefix(buf, sizeof(buf))
);
} else {
retval = get_remote_desktop_port();
if (retval) return retval;
sprintf(buf, "%d", rd_host_port);
command = "modifyvm \"" + vm_name + "\" ";
command += "--vrde on ";
command += "--vrdeextpack default ";
command += "--vrdeauthlibrary default ";
command += "--vrdeauthtype null ";
command += "--vrdeport " + string(buf) + " ";
retval = vbm_popen(command, output, "remote desktop");
if(retval) return retval;
}
}
// Enable the shared folder if a shared folder is specified.
//
if (enable_shared_directory) {
fprintf(
stderr,
"%s Enabling shared directory for VM.\n",
vboxwrapper_msg_prefix(buf, sizeof(buf))
);
command = "sharedfolder add \"" + vm_name + "\" ";
command += "--name \"shared\" ";
command += "--hostpath \"" + virtual_machine_slot_directory + "/shared\"";
retval = vbm_popen(command, output, "enable shared dir");
if (retval) return retval;
}
return 0;
}
int VBOX_VM::deregister_vm(bool delete_media) {
string command;
string output;
string virtual_machine_slot_directory;
char buf[256];
get_slot_directory(virtual_machine_slot_directory);
fprintf(
stderr,
"%s Deregistering VM.\n",
vboxwrapper_msg_prefix(buf, sizeof(buf))
);
// Cleanup any left-over snapshots
//
cleanupsnapshots(true);
// Delete its storage controller(s)
//
fprintf(
stderr,
"%s Removing storage controller(s) from VM.\n",
vboxwrapper_msg_prefix(buf, sizeof(buf))
);
command = "storagectl \"" + vm_name + "\" ";
command += "--name \"IDE Controller\" ";
command += "--remove ";
vbm_popen(command, output, "deregister storage controller (fixed disk)", false, false);
if (enable_floppyio) {
command = "storagectl \"" + vm_name + "\" ";
command += "--name \"Floppy Controller\" ";
command += "--remove ";
vbm_popen(command, output, "deregister storage controller (floppy disk)", false, false);
}
// Next, delete VM
//
fprintf(
stderr,
"%s Removing VM from VirtualBox.\n",
vboxwrapper_msg_prefix(buf, sizeof(buf))
);
command = "unregistervm \"" + vm_name + "\" ";
command += "--delete ";
vbm_popen(command, output, "delete VM", false, false);
// Lastly delete medium(s) from Virtual Box Media Registry
//
fprintf(
stderr,
"%s Removing virtual disk drive from VirtualBox.\n",
vboxwrapper_msg_prefix(buf, sizeof(buf))
);
command = "closemedium disk \"" + virtual_machine_slot_directory + "/" + image_filename + "\" ";
if (delete_media) {
command += "--delete ";
}
vbm_popen(command, output, "remove virtual disk", false, false);
if (enable_floppyio) {
fprintf(
stderr,
"%s Removing virtual floppy disk from VirtualBox.\n",
vboxwrapper_msg_prefix(buf, sizeof(buf))
);
command = "closemedium floppy \"" + virtual_machine_slot_directory + "/" + floppy_image_filename + "\" ";
if (delete_media) {
command += "--delete ";
}
vbm_popen(command, output, "remove virtual floppy disk", false, false);
}
return 0;
}
int VBOX_VM::deregister_stale_vm() {
string command;
string output;
string virtual_machine_slot_directory;
size_t uuid_start;
size_t uuid_end;
int retval;
get_slot_directory(virtual_machine_slot_directory);
// We need to determine what the name or uuid is of the previous VM which owns
// this virtual disk
//
command = "showhdinfo \"" + virtual_machine_slot_directory + "/" + image_filename + "\" ";
retval = vbm_popen(command, output, "get HDD info");
if (retval) return retval;
// Output should look a little like this:
// UUID: c119acaf-636c-41f6-86c9-38e639a31339
// Accessible: yes
// Logical size: 10240 MBytes
// Current size on disk: 0 MBytes
// Type: normal (base)
// Storage format: VDI
// Format variant: dynamic default
// In use by VMs: test2 (UUID: 000ab2be-1254-4c6a-9fdc-1536a478f601)
// Location: C:\Users\romw\VirtualBox VMs\test2\test2.vdi
//
uuid_start = output.find("(UUID: ");
if (uuid_start != string::npos) {
// We can parse the virtual machine ID from the output
uuid_start += 7;
uuid_end = output.find(")", uuid_start);
vm_name = output.substr(uuid_start, uuid_end - uuid_start);
// Deregister stale VM by UUID
return deregister_vm(false);
} else {
// Did the user delete the VM in VirtualBox and not the medium? If so,
// just remove the medium.
command = "closemedium disk \"" + virtual_machine_slot_directory + "/" + image_filename + "\" ";
vbm_popen(command, output, "remove virtual disk", false);
if (enable_floppyio) {
command = "closemedium floppy \"" + virtual_machine_slot_directory + "/" + floppy_image_filename + "\" ";
vbm_popen(command, output, "remove virtual floppy disk", false);
}
}
return 0;
}
int VBOX_VM::get_install_directory(string& virtualbox_install_directory ) {
#ifdef _WIN32
LONG lReturnValue;
HKEY hkSetupHive;
LPTSTR lpszRegistryValue = NULL;
DWORD dwSize = 0;
// change the current directory to the boinc data directory if it exists
lReturnValue = RegOpenKeyEx(
HKEY_LOCAL_MACHINE,
_T("SOFTWARE\\Oracle\\VirtualBox"),
0,
KEY_READ,
&hkSetupHive
);
if (lReturnValue == ERROR_SUCCESS) {
// How large does our buffer need to be?
lReturnValue = RegQueryValueEx(
hkSetupHive,
_T("InstallDir"),
NULL,
NULL,
NULL,
&dwSize
);
if (lReturnValue != ERROR_FILE_NOT_FOUND) {
// Allocate the buffer space.
lpszRegistryValue = (LPTSTR) malloc(dwSize);
(*lpszRegistryValue) = NULL;
// Now get the data
lReturnValue = RegQueryValueEx(
hkSetupHive,
_T("InstallDir"),
NULL,
NULL,
(LPBYTE)lpszRegistryValue,
&dwSize
);
virtualbox_install_directory = lpszRegistryValue;
}
}
if (hkSetupHive) RegCloseKey(hkSetupHive);
if (lpszRegistryValue) free(lpszRegistryValue);
if (virtualbox_install_directory.empty()) {
return 1;
}
return 0;
#else
virtualbox_install_directory = "";
return 0;
#endif
}
// Returns the current directory in which the executable resides.
//
int VBOX_VM::get_slot_directory(string& dir) {
char slot_dir[256];
getcwd(slot_dir, sizeof(slot_dir));
dir = slot_dir;
if (!dir.empty()) {
return 1;
}
return 0;
}
int VBOX_VM::get_network_bytes_sent(double& sent) {
string command;
string output;
string counter_value;
size_t counter_start;
size_t counter_end;
int retval;
command = "debugvm \"" + vm_name + "\" ";
command += "statistics --pattern \"/Devices/*/TransmitBytes\" ";
retval = vbm_popen(command, output, "get bytes sent");
if (retval) return retval;
// Output should look like this:
// <?xml version="1.0" encoding="UTF-8" standalone="no"?>
// <Statistics>
// <Counter c="397229" unit="bytes" name="/Devices/PCNet0/TransmitBytes"/>
// <Counter c="256" unit="bytes" name="/Devices/PCNet1/TransmitBytes"/>
// </Statistics>
// add up the counter(s)
//
sent = 0;
counter_start = output.find("c=\"");
while (counter_start != string::npos) {
counter_start += 3;
counter_end = output.find("\"", counter_start);
counter_value = output.substr(counter_start, counter_end - counter_start);
sent += atof(counter_value.c_str());
counter_start = output.find("c=\"", counter_start);
}
return 0;
}
int VBOX_VM::get_network_bytes_received(double& received) {
string command;
string output;
string counter_value;
size_t counter_start;
size_t counter_end;
int retval;
command = "debugvm \"" + vm_name + "\" ";
command += "statistics --pattern \"/Devices/*/ReceiveBytes\" ";
retval = vbm_popen(command, output, "get bytes received");
if (retval) return retval;
// Output should look like this:
// <?xml version="1.0" encoding="UTF-8" standalone="no"?>
// <Statistics>
// <Counter c="9423150" unit="bytes" name="/Devices/PCNet0/ReceiveBytes"/>
// <Counter c="256" unit="bytes" name="/Devices/PCNet1/ReceiveBytes"/>
// </Statistics>
// add up the counter(s)
//
received = 0;
counter_start = output.find("c=\"");
while (counter_start != string::npos) {
counter_start += 3;
counter_end = output.find("\"", counter_start);
counter_value = output.substr(counter_start, counter_end - counter_start);
received += atof(counter_value.c_str());
counter_start = output.find("c=\"", counter_start);
}
return 0;
}
int VBOX_VM::get_system_log(string& log) {
string virtualbox_user_home;
string slot_directory;
string virtualbox_system_log_src;
string virtualbox_system_log_dst;
string::iterator iter;
char buf[256];
int retval = 0;
// Where is VirtualBox storing its configuration files?
if (getenv("VBOX_USER_HOME")) {
virtualbox_user_home = getenv("VBOX_USER_HOME");
} else {
// If the override environment variable isn't specified then
// it is based of the current users HOME directory.
#ifdef _WIN32
virtualbox_user_home = getenv("USERPROFILE");
#else
virtualbox_user_home = getenv("HOME");
#endif
virtualbox_user_home += "/.VirtualBox";
}
// Where should we copy temp files to?
get_slot_directory(slot_directory);
// Locate and read log file
virtualbox_system_log_src = virtualbox_user_home + "/VBoxSVC.log";
virtualbox_system_log_dst = slot_directory + "/VBoxSVC.log";
if (boinc_file_exists(virtualbox_system_log_src.c_str())) {
// Skip having to deal with various forms of file locks by just making a temp
// copy of the log file.
boinc_copy(virtualbox_system_log_src.c_str(), virtualbox_system_log_dst.c_str());
// Keep only the last 16k if it is larger than that.
read_file_string(virtualbox_system_log_dst.c_str(), log, 16384, true);
#ifdef _WIN32
// Remove \r from the log spew
iter = log.begin();
while (iter != log.end()) {
if (*iter == '\r') {
iter = log.erase(iter);
} else {
++iter;
}
}
#endif
if (log.size() >= 16384) {
// Look for the next whole line of text.
iter = log.begin();
while (iter != log.end()) {
if (*iter == '\n') {
log.erase(iter);
break;
}
iter = log.erase(iter);
}
}
} else {
fprintf(
stderr,
"%s Could not find the Hypervisor System Log at '%s'.\n",
vboxwrapper_msg_prefix(buf, sizeof(buf)),
virtualbox_system_log_src.c_str()
);
retval = ERR_NOT_FOUND;
}
return retval;
}
int VBOX_VM::get_vm_log(string& log) {
string command;
string output;
string::iterator iter;
int retval;
command = "showvminfo \"" + vm_name + "\" ";
command += "--log 0 ";
retval = vbm_popen(command, output, "get vm log");
if (retval) return retval;
// Keep only the last 16k if it is larger than that.
size_t size = output.size();
if (size > 16384) {
log = output.substr(size - 16384, size);
#ifdef _WIN32
// Remove \r from the log spew
iter = log.begin();
while (iter != log.end()) {
if (*iter == '\r') {
iter = log.erase(iter);
} else {
++iter;
}
}
#endif
if (log.size() >= 16384) {
// Look for the next whole line of text.
iter = log.begin();
while (iter != log.end()) {
if (*iter == '\n') {
log.erase(iter);
break;
}
iter = log.erase(iter);
}
}
} else {
log = output;
}
return 0;
}
int VBOX_VM::get_vm_exit_code(unsigned long& exit_code) {
#ifndef _WIN32
int ec = 0;
waitpid(vm_pid, &ec, WNOHANG);
exit_code = ec;
#else
GetExitCodeProcess(vm_pid_handle, &exit_code);
#endif
return 0;
}
int VBOX_VM::get_vm_process_id(int& process_id) {
string command;
string output;
string pid;
size_t pid_start;
size_t pid_end;
int retval;
command = "showvminfo \"" + vm_name + "\" ";
command += "--log 0 ";
retval = vbm_popen(command, output, "get process ID");
if (retval) return retval;
// Output should look like this:
// VirtualBox 4.1.0 r73009 win.amd64 (Jul 19 2011 13:05:53) release log
// 00:00:06.008 Log opened 2011-09-01T23:00:59.829170900Z
// 00:00:06.008 OS Product: Windows 7
// 00:00:06.009 OS Release: 6.1.7601
// 00:00:06.009 OS Service Pack: 1
// 00:00:06.015 Host RAM: 4094MB RAM, available: 876MB
// 00:00:06.015 Executable: C:\Program Files\Oracle\VirtualBox\VirtualBox.exe
// 00:00:06.015 Process ID: 6128
// 00:00:06.015 Package type: WINDOWS_64BITS_GENERIC
// 00:00:06.015 Installed Extension Packs:
// 00:00:06.015 None installed!
//
pid_start = output.find("Process ID: ");
if (pid_start == string::npos) {
return ERR_NOT_FOUND;
}
pid_start += 12;
pid_end = output.find("\n", pid_start);
pid = output.substr(pid_start, pid_end - pid_start);
if (pid.size() <= 0) {
return ERR_NOT_FOUND;
}
process_id = atol(pid.c_str());
#ifndef _WIN32
vm_pid = process_id;
#else
vm_pid_handle = OpenProcess(
PROCESS_QUERY_INFORMATION | PROCESS_SET_INFORMATION,
FALSE,
process_id
);
#endif
return 0;
}
int VBOX_VM::get_port_forwarding_port() {
sockaddr_in addr;
BOINC_SOCKLEN_T addrsize;
int sock;
int retval;
addrsize = sizeof(sockaddr_in);
memset(&addr, 0, sizeof(sockaddr_in));
addr.sin_family = AF_INET;
addr.sin_port = htons(pf_host_port);
addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
retval = boinc_socket(sock);
if (retval) return retval;
retval = bind(sock, (const sockaddr*)&addr, addrsize);
if (retval < 0) {
boinc_close_socket(sock);
// Lets see if we can get anything useable at this point
memset(&addr, 0, sizeof(sockaddr_in));
addr.sin_family = AF_INET;
addr.sin_port = htons(0);
addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
retval = boinc_socket(sock);
if (retval) return retval;
retval = bind(sock, (const sockaddr*)&addr, addrsize);
if (retval < 0) {
boinc_close_socket(sock);
return ERR_BIND;
}
}
getsockname(sock, (sockaddr*)&addr, &addrsize);
pf_host_port = ntohs(addr.sin_port);
boinc_close_socket(sock);
return 0;
}
int VBOX_VM::get_remote_desktop_port() {
sockaddr_in addr;
BOINC_SOCKLEN_T addrsize;
int sock;
int retval;
addrsize = sizeof(sockaddr_in);
memset(&addr, 0, sizeof(sockaddr_in));
addr.sin_family = AF_INET;
addr.sin_port = htons(0);
addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
retval = boinc_socket(sock);
if (retval) return retval;
retval = bind(sock, (const sockaddr*)&addr, addrsize);
if (retval < 0) {
boinc_close_socket(sock);
return ERR_BIND;
}
getsockname(sock, (sockaddr*)&addr, &addrsize);
rd_host_port = ntohs(addr.sin_port);
boinc_close_socket(sock);
return 0;
}
// Enable the network adapter if a network connection is required.
// NOTE: Network access should never be allowed if the code running in a
// shared directory or the VM image itself is NOT signed. Doing so
// opens up the network behind the company firewall to attack.
//
// Imagine a doomsday scenario where a project has been compromised and
// an unsigned executable/VM image has been tampered with. Volunteer
// downloads compromised code and executes it on a company machine.
// Now the compromised VM starts attacking other machines on the company
// network. The company firewall cannot help because the attacking
// machine is already behind the company firewall.
//
int VBOX_VM::set_network_access(bool enabled) {
string command;
string output;
char buf[256];
int retval;
network_suspended = !enabled;
if (enabled) {
fprintf(
stderr,
"%s Enabling network access for VM.\n",
vboxwrapper_msg_prefix(buf, sizeof(buf))
);
command = "modifyvm \"" + vm_name + "\" ";
command += "--cableconnected1 on ";
retval = vbm_popen(command, output, "enable network");
if (retval) return retval;
} else {
fprintf(
stderr,
"%s Disabling network access for VM.\n",
vboxwrapper_msg_prefix(buf, sizeof(buf))
);
command = "modifyvm \"" + vm_name + "\" ";
command += "--cableconnected1 off ";
retval = vbm_popen(command, output, "disable network");
if (retval) return retval;
}
return 0;
}
int VBOX_VM::set_cpu_usage_fraction(double x) {
string command;
string output;
char buf[256];
int retval;
// the arg to controlvm is percentage
//
fprintf(
stderr,
"%s Setting cpu throttle for VM. (%d%%)\n",
vboxwrapper_msg_prefix(buf, sizeof(buf)),
(int)x
);
sprintf(buf, "%d", (int)x);
command = "controlvm \"" + vm_name + "\" ";
command += "cpuexecutioncap ";
command += buf;
command += " ";
retval = vbm_popen(command, output, "CPU throttle");
if (retval) return retval;
return 0;
}
int VBOX_VM::set_network_max_bytes_sec(double x) {
string command;
string output;
char buf[256];
int retval;
// the argument to modifyvm is in Kbps
//
fprintf(
stderr,
"%s Setting network throttle for VM.\n",
vboxwrapper_msg_prefix(buf, sizeof(buf))
);
sprintf(buf, "%d", (int)(x*8./1000.));
command = "modifyvm \"" + vm_name + "\" ";
command += "--nicspeed1 ";
command += buf;
command += " ";
retval = vbm_popen(command, output, "network throttle");
if (retval) return retval;
return 0;
}
int VBOX_VM::read_floppy(std::string& data) {
if (enable_floppyio && pFloppy) {
data = pFloppy->receive();
return 0;
}
return 1;
}
int VBOX_VM::write_floppy(std::string& data) {
if (enable_floppyio && pFloppy) {
pFloppy->send(data);
return 0;
}
return 1;
}
void VBOX_VM::lower_vm_process_priority() {
#ifndef _WIN32
if (vm_pid) {
setpriority(PRIO_PROCESS, vm_pid, PROCESS_IDLE_PRIORITY);
}
#else
if (vm_pid_handle) {
SetPriorityClass(vm_pid_handle, BELOW_NORMAL_PRIORITY_CLASS);
}
#endif
}
void VBOX_VM::reset_vm_process_priority() {
#ifndef _WIN32
if (vm_pid) {
setpriority(PRIO_PROCESS, vm_pid, PROCESS_MEDIUM_PRIORITY);
}
#else
if (vm_pid_handle) {
SetPriorityClass(vm_pid_handle, NORMAL_PRIORITY_CLASS);
}
#endif
}
// If there are errors we can recover from, process them here.
//
int VBOX_VM::vbm_popen(string& arguments, string& output, const char* item, bool log_error, bool retry_failures, unsigned int timeout) {
int retval = 0;
int retry_count = 0;
double sleep_interval = 1.0;
char buf[256];
string retry_notes;
do {
retval = vbm_popen_raw(arguments, output, timeout);
if (retval) {
// VirtualBox designed the concept of sessions to prevent multiple applications using
// the VirtualBox COM API (virtualbox.exe, vboxmanage.exe) from modifying the same VM
// at the same time.
//
// The problem here is that vboxwrapper uses vboxmanage.exe to modify and control the
// VM. Vboxmanage.exe can only maintain the session lock for as long as it takes it
// to run. So that means 99% of the time that a VM is running under BOINC technology
// it is running without a session lock.
//
// If a volunteer opens another VirtualBox management application and goes poking around
// that application can aquire the session lock and not give it up for some time.
//
// If we detect that condition retry the desired command.
//
// Experiments performed by jujube suggest changing the sleep interval to an exponential
// style backoff would increase our chances of success in situations where the previous
// lock is held by a previous instance of vboxmanage whos instance data hasn't been
// cleaned up within vboxsvc yet.
//
// Error Code: VBOX_E_INVALID_OBJECT_STATE (0x80bb0007)
//
if (0x80bb0007 == retval) {
if (retry_notes.find("Another VirtualBox management") == string::npos) {
retry_notes += "Another VirtualBox management application has locked the session for\n";
retry_notes += "this VM. BOINC cannot properly monitor this VM\n";
retry_notes += "and so this job will be aborted.\n\n";
}
if (retry_count) {
sleep_interval *= 2;
}
}
// Retry?
if (!retry_failures) break;
// Timeout?
if (retry_count >= 5) break;
retry_count++;
boinc_sleep(sleep_interval);
}
}
while (retval);
#ifdef _WIN32
// Remove \r from the log spew
string::iterator iter = output.begin();
while (iter != output.end()) {
if (*iter == '\r') {
iter = output.erase(iter);
} else {
++iter;
}
}
#endif
// Add all relivent notes to the output string and log errors
//
if (retval && log_error) {
if (!retry_notes.empty()) {
output += "\nNotes:\n\n" + retry_notes;
}
fprintf(
stderr,
"%s Error in %s for VM: %d\nArguments:\n%s\nOutput:\n%s\n",
vboxwrapper_msg_prefix(buf, sizeof(buf)),
item,
retval,
arguments.c_str(),
output.c_str()
);
}
return retval;
}
// Execute the vbox manage application and copy the output to the buffer.
//
int VBOX_VM::vbm_popen_raw(string& arguments, string& output, unsigned int timeout) {
char buf[256];
string command;
size_t errcode_start;
size_t errcode_end;
string errcode;
int retval = 0;
// Initialize command line
command = "VBoxManage -q " + arguments;
// Reset output buffer
output.clear();
#ifdef _WIN32
STARTUPINFO si;
PROCESS_INFORMATION pi;
SECURITY_ATTRIBUTES sa;
SECURITY_DESCRIPTOR sd;
HANDLE hReadPipe = NULL, hWritePipe = NULL;
void* pBuf = NULL;
DWORD dwCount = 0;
unsigned long ulExitCode = 0;
unsigned long ulExitTimeout = 0;
memset(&si, 0, sizeof(si));
memset(&pi, 0, sizeof(pi));
memset(&sa, 0, sizeof(sa));
memset(&sd, 0, sizeof(sd));
InitializeSecurityDescriptor(&sd, SECURITY_DESCRIPTOR_REVISION);
SetSecurityDescriptorDacl(&sd, true, NULL, false);
sa.nLength = sizeof(SECURITY_ATTRIBUTES);
sa.bInheritHandle = TRUE;
sa.lpSecurityDescriptor = &sd;
if (!CreatePipe(&hReadPipe, &hWritePipe, &sa, NULL)) {
fprintf(
stderr,
"%s CreatePipe failed! (%d).\n",
vboxwrapper_msg_prefix(buf, sizeof(buf)),
GetLastError()
);
goto CLEANUP;
}
SetHandleInformation(hReadPipe, HANDLE_FLAG_INHERIT, 0);
si.cb = sizeof(STARTUPINFO);
si.dwFlags |= STARTF_FORCEOFFFEEDBACK | STARTF_USESHOWWINDOW | STARTF_USESTDHANDLES;
si.wShowWindow = SW_HIDE;
si.hStdOutput = hWritePipe;
si.hStdError = hWritePipe;
si.hStdInput = NULL;
// Execute command
if (!CreateProcess(
NULL,
(LPTSTR)command.c_str(),
NULL,
NULL,
TRUE,
CREATE_NO_WINDOW, NULL,
NULL,
&si,
&pi
)) {
fprintf(
stderr,
"%s CreateProcess failed! (%d).\n",
vboxwrapper_msg_prefix(buf, sizeof(buf)),
GetLastError()
);
goto CLEANUP;
}
// Wait until process has completed
while(1) {
if (timeout == 0) {
WaitForSingleObject(pi.hProcess, INFINITE);
}
GetExitCodeProcess(pi.hProcess, &ulExitCode);
// Copy stdout/stderr to output buffer, handle in the loop so that we can
// copy the pipe as it is populated and prevent the child process from blocking
// in case the output is bigger than pipe buffer.
PeekNamedPipe(hReadPipe, NULL, NULL, NULL, &dwCount, NULL);
if (dwCount) {
pBuf = malloc(dwCount+1);
memset(pBuf, 0, dwCount+1);
if (ReadFile(hReadPipe, pBuf, dwCount, &dwCount, NULL)) {
output += (char*)pBuf;
}
free(pBuf);
}
if (ulExitCode != STILL_ACTIVE) break;
// Timeout?
if (ulExitTimeout >= (timeout * 1000)) {
TerminateProcess(pi.hProcess, EXIT_FAILURE);
ulExitCode = 0;
retval = ERR_TIMEOUT;
Sleep(1000);
}
Sleep(250);
ulExitTimeout += 250;
}
CLEANUP:
if (pi.hThread) CloseHandle(pi.hThread);
if (pi.hProcess) CloseHandle(pi.hProcess);
if (hReadPipe) CloseHandle(hReadPipe);
if (hWritePipe) CloseHandle(hWritePipe);
if ((ulExitCode != 0) || (!pi.hProcess)) {
// Determine the real error code by parsing the output
errcode_start = output.find("(0x");
if (errcode_start) {
errcode_start += 1;
errcode_end = output.find(")", errcode_start);
errcode = output.substr(errcode_start, errcode_end - errcode_start);
sscanf(errcode.c_str(), "%x", &retval);
}
// If something couldn't be found, just return ERR_FOPEN
if (!retval) retval = ERR_FOPEN;
}
#else
FILE* fp;
// redirect stderr to stdout for the child process so we can trap it with popen.
string modified_command = command + " 2>&1";
// Execute command
fp = popen(modified_command.c_str(), "r");
if (fp == NULL){
fprintf(
stderr,
"%s vbm_popen popen failed! errno = %d\n",
vboxwrapper_msg_prefix(buf, sizeof(buf)),
errno
);
retval = ERR_FOPEN;
} else {
// Copy output to buffer
while (fgets(buf, 256, fp)) {
output += buf;
}
// Close stream
pclose(fp);
// Determine the real error code by parsing the output
errcode_start = output.find("(0x");
if (errcode_start) {
errcode_start += 1;
errcode_end = output.find(")", errcode_start);
errcode = output.substr(errcode_start, errcode_end - errcode_start);
sscanf(errcode.c_str(), "%x", &retval);
}
retval = 0;
}
#endif
return retval;
}
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