// Copyright 2009 the V8 project authors. All rights reserved.

// Use of this source code is governed by a BSD-style license that can be

// found in the LICENSE file.

#include <errno.h>

#include <fcntl.h>

#include "src/d8/d8.h"

#ifndef V8_OS_ZOS

#include <netinet/ip.h>

#endif

#include <signal.h>

#include <stdlib.h>

#include <string.h>

#include <sys/select.h>

#include <sys/socket.h>

#include <sys/stat.h>

#include <sys/time.h>

#include <sys/types.h>

#include <sys/wait.h>

#include <unistd.h>

#include "include/v8-container.h"

#include "include/v8-template.h"

namespace v8 {

// If the buffer ends in the middle of a UTF-8 sequence then we return

// the length of the string up to but not including the incomplete UTF-8

// sequence. If the buffer ends with a valid UTF-8 sequence then we

// return the whole buffer.

static int LengthWithoutIncompleteUtf8(char* buffer, int len) {

int answer = len;

// 1-byte encoding.

static const int kUtf8SingleByteMask = 0x80;

static const int kUtf8SingleByteValue = 0x00;

// 2-byte encoding.

static const int kUtf8TwoByteMask = 0xE0;

static const int kUtf8TwoByteValue = 0xC0;

// 3-byte encoding.

static const int kUtf8ThreeByteMask = 0xF0;

static const int kUtf8ThreeByteValue = 0xE0;

// 4-byte encoding.

static const int kUtf8FourByteMask = 0xF8;

static const int kUtf8FourByteValue = 0xF0;

// Subsequent bytes of a multi-byte encoding.

static const int kMultiByteMask = 0xC0;

static const int kMultiByteValue = 0x80;

int multi_byte_bytes_seen = 0;

while (answer > 0) {

int c = buffer[answer - 1];

// Ends in valid single-byte sequence?

if ((c & kUtf8SingleByteMask) == kUtf8SingleByteValue) return answer;

// Ends in one or more subsequent bytes of a multi-byte value?

if ((c & kMultiByteMask) == kMultiByteValue) {

multi_byte_bytes_seen++;

answer--;

} else {

if ((c & kUtf8TwoByteMask) == kUtf8TwoByteValue) {

if (multi_byte_bytes_seen >= 1) {

return answer + 2;

}

return answer - 1;

} else if ((c & kUtf8ThreeByteMask) == kUtf8ThreeByteValue) {

if (multi_byte_bytes_seen >= 2) {

return answer + 3;

}

return answer - 1;

} else if ((c & kUtf8FourByteMask) == kUtf8FourByteValue) {

if (multi_byte_bytes_seen >= 3) {

return answer + 4;

}

return answer - 1;

} else {

return answer; // Malformed UTF-8.

}

}

}

return 0;

}

// Suspends the thread until there is data available from the child process.

// Returns false on timeout, true on data ready.

static bool WaitOnFD(int fd, int read_timeout, int total_timeout,

const struct timeval& start_time) {

fd_set readfds, writefds, exceptfds;

struct timeval timeout;

int gone = 0;

if (total_timeout != -1) {

struct timeval time_now;

gettimeofday(&time_now, nullptr);

time_t seconds = time_now.tv_sec - start_time.tv_sec;

gone = static_cast<int>(seconds * 1000 +

(time_now.tv_usec - start_time.tv_usec) / 1000);

if (gone >= total_timeout) return false;

}

FD_ZERO(&readfds);

FD_ZERO(&writefds);

FD_ZERO(&exceptfds);

FD_SET(fd, &readfds);

FD_SET(fd, &exceptfds);

if (read_timeout == -1 ||

(total_timeout != -1 && total_timeout - gone < read_timeout)) {

read_timeout = total_timeout - gone;

}

timeout.tv_usec = (read_timeout % 1000) * 1000;

timeout.tv_sec = read_timeout / 1000;

int number_of_fds_ready = select(fd + 1, &readfds, &writefds, &exceptfds,

read_timeout != -1 ? &timeout : nullptr);

return number_of_fds_ready == 1;

}

// Checks whether we ran out of time on the timeout. Returns true if we ran out

// of time, false if we still have time.

static bool TimeIsOut(const struct timeval& start_time, const int& total_time) {

if (total_time == -1) return false;

struct timeval time_now;

gettimeofday(&time_now, nullptr);

// Careful about overflow.

int seconds = static_cast<int>(time_now.tv_sec - start_time.tv_sec);

if (seconds > 100) {

if (seconds * 1000 > total_time) return true;

return false;

}

int useconds = static_cast<int>(time_now.tv_usec - start_time.tv_usec);

if (seconds * 1000000 + useconds > total_time * 1000) {

return true;

}

return false;

}

// A utility class that does a non-hanging waitpid on the child process if we

// bail out of the System() function early. If you don't ever do a waitpid on

// a subprocess then it turns into one of those annoying 'zombie processes'.

class ZombieProtector {

public:

explicit ZombieProtector(int pid) : pid_(pid) {}

~ZombieProtector() {

if (pid_ != 0) waitpid(pid_, nullptr, 0);

}

void ChildIsDeadNow() { pid_ = 0; }

private:

int pid_;

};

// A utility class that closes a file descriptor when it goes out of scope.

class OpenFDCloser {

public:

explicit OpenFDCloser(int fd) : fd_(fd) {}

~OpenFDCloser() { close(fd_); }

private:

int fd_;

};

// A utility class that takes the array of command arguments and puts then in an

// array of new[]ed UTF-8 C strings. Deallocates them again when it goes out of

// scope.

class ExecArgs {

public:

ExecArgs() { exec_args_[0] = nullptr; }

bool Init(Isolate* isolate, Local<Value> arg0, Local<Array> command_args) {

String::Utf8Value prog(isolate, arg0);

if (*prog == nullptr) {

isolate->ThrowError(

"os.system(): String conversion of program name failed");

return false;

}

{

size_t len = prog.length() + 3;

char* c_arg = new char[len];

snprintf(c_arg, len, "%s", *prog);

exec_args_[0] = c_arg;

}

int i = 1;

for (unsigned j = 0; j < command_args->Length(); i++, j++) {

Local<Value> arg(

command_args

->Get(isolate->GetCurrentContext(), Integer::New(isolate, j))

.ToLocalChecked());

String::Utf8Value utf8_arg(isolate, arg);

if (*utf8_arg == nullptr) {

exec_args_[i] = nullptr; // Consistent state for destructor.

isolate->ThrowError(

"os.system(): String conversion of argument failed.");

return false;

}

size_t len = utf8_arg.length() + 1;

char* c_arg = new char[len];

snprintf(c_arg, len, "%s", *utf8_arg);

exec_args_[i] = c_arg;

}

exec_args_[i] = nullptr;

return true;

}

~ExecArgs() {

for (unsigned i = 0; i < kMaxArgs; i++) {

if (exec_args_[i] == nullptr) {

return;

}

delete[] exec_args_[i];

exec_args_[i] = nullptr;

}

}

static const unsigned kMaxArgs = 1000;

char* const* arg_array() const { return exec_args_; }

const char* arg0() const { return exec_args_[0]; }

private:

char* exec_args_[kMaxArgs + 1];

};

// Gets the optional timeouts from the arguments to the system() call.

static bool GetTimeouts(const v8::FunctionCallbackInfo<v8::Value>& info,

int* read_timeout, int* total_timeout) {

if (info.Length() > 3) {

if (info[3]->IsNumber()) {

*total_timeout = info[3]

->Int32Value(info.GetIsolate()->GetCurrentContext())

.FromJust();

} else {

info.GetIsolate()->ThrowError("system: Argument 4 must be a number");

return false;

}

}

if (info.Length() > 2) {

if (info[2]->IsNumber()) {

*read_timeout = info[2]

->Int32Value(info.GetIsolate()->GetCurrentContext())

.FromJust();

} else {

info.GetIsolate()->ThrowError("system: Argument 3 must be a number");

return false;

}

}

return true;

}

namespace {

v8::Local<v8::String> v8_strerror(v8::Isolate* isolate, int err) {

return v8::String::NewFromUtf8(isolate, strerror(err)).ToLocalChecked();

}

} // namespace

static const int kReadFD = 0;

static const int kWriteFD = 1;

// This is run in the child process after fork() but before exec(). It normally

// ends with the child process being replaced with the desired child program.

// It only returns if an error occurred.

static void ExecSubprocess(int* exec_error_fds, int* stdout_fds,

const ExecArgs& exec_args) {

close(exec_error_fds[kReadFD]); // Don't need this in the child.

close(stdout_fds[kReadFD]); // Don't need this in the child.

close(1); // Close stdout.

dup2(stdout_fds[kWriteFD], 1); // Dup pipe fd to stdout.

close(stdout_fds[kWriteFD]); // Don't need the original fd now.

fcntl(exec_error_fds[kWriteFD], F_SETFD, FD_CLOEXEC);

execvp(exec_args.arg0(), exec_args.arg_array());

// Only get here if the exec failed. Write errno to the parent to tell

// them it went wrong. If it went well the pipe is closed.

int err = errno;

ssize_t bytes_written;

do {

bytes_written = write(exec_error_fds[kWriteFD], &err, sizeof(err));

} while (bytes_written == -1 && errno == EINTR);

// Return (and exit child process).

}

// Runs in the parent process. Checks that the child was able to exec (closing

// the file desriptor), or reports an error if it failed.

static bool ChildLaunchedOK(Isolate* isolate, int* exec_error_fds) {

ssize_t bytes_read;

int err;

do {

bytes_read = read(exec_error_fds[kReadFD], &err, sizeof(err));

} while (bytes_read == -1 && errno == EINTR);

if (bytes_read != 0) {

isolate->ThrowError(v8_strerror(isolate, err));

return false;

}

return true;

}

// Accumulates the output from the child in a string handle. Returns true if it

// succeeded or false if an exception was thrown.

static Local<Value> GetStdout(Isolate* isolate, int child_fd,

const struct timeval& start_time,

int read_timeout, int total_timeout) {

Local<String> accumulator = String::Empty(isolate);

int fullness = 0;

static const int kStdoutReadBufferSize = 4096;

char buffer[kStdoutReadBufferSize];

if (fcntl(child_fd, F_SETFL, O_NONBLOCK) != 0) {

return isolate->ThrowError(v8_strerror(isolate, errno));

}

int bytes_read;

do {

bytes_read = static_cast<int>(

read(child_fd, buffer + fullness, kStdoutReadBufferSize - fullness));

if (bytes_read == -1) {

if (errno == EAGAIN) {

if (!WaitOnFD(child_fd, read_timeout, total_timeout, start_time) ||

(TimeIsOut(start_time, total_timeout))) {

return isolate->ThrowError("Timed out waiting for output");

}

continue;

} else if (errno == EINTR) {

continue;

} else {

break;

}

}

if (bytes_read + fullness > 0) {

int length = bytes_read == 0 ? bytes_read + fullness

: LengthWithoutIncompleteUtf8(

buffer, bytes_read + fullness);

Local<String> addition =

String::NewFromUtf8(isolate, buffer, NewStringType::kNormal, length)

.ToLocalChecked();

accumulator = String::Concat(isolate, accumulator, addition);

fullness = bytes_read + fullness - length;

memcpy(buffer, buffer + length, fullness);

}

} while (bytes_read != 0);

return accumulator;

}

// Modern Linux has the waitid call, which is like waitpid, but more useful

// if you want a timeout. If we don't have waitid we can't limit the time

// waiting for the process to exit without losing the information about

// whether it exited normally. In the common case this doesn't matter because

// we don't get here before the child has closed stdout and most programs don't

// do that before they exit.

//

// We're disabling usage of waitid in Mac OS X because it doesn't work for us:

// a parent process hangs on waiting while a child process is already a zombie.

// See http://code.google.com/p/v8/issues/detail?id=401.

#if defined(WNOWAIT) && !defined(ANDROID) && !defined(__APPLE__) && \

!defined(__NetBSD__) && !defined(__Fuchsia__)

#if !defined(__FreeBSD__)

#define HAS_WAITID 1

#endif

#endif

// Get exit status of child.

static bool WaitForChild(Isolate* isolate, int pid,

ZombieProtector& child_waiter,

const struct timeval& start_time, int read_timeout,

int total_timeout) {

#ifdef HAS_WAITID

siginfo_t child_info;

child_info.si_pid = 0;

int useconds = 1;

// Wait for child to exit.

while (child_info.si_pid == 0) {

waitid(P_PID, pid, &child_info, WEXITED | WNOHANG | WNOWAIT);

usleep(useconds);

if (useconds < 1000000) useconds <<= 1;

if ((read_timeout != -1 && useconds / 1000 > read_timeout) ||

(TimeIsOut(start_time, total_timeout))) {

isolate->ThrowError("Timed out waiting for process to terminate");

kill(pid, SIGINT);

return false;

}

}

if (child_info.si_code == CLD_KILLED) {

char message[999];

snprintf(message, sizeof(message), "Child killed by signal %d",

child_info.si_status);

isolate->ThrowError(message);

return false;

}

if (child_info.si_code == CLD_EXITED && child_info.si_status != 0) {

char message[999];

snprintf(message, sizeof(message), "Child exited with status %d",

child_info.si_status);

isolate->ThrowError(message);

return false;

}

#else // No waitid call.

int child_status;

waitpid(pid, &child_status, 0); // We hang here if the child doesn't exit.

child_waiter.ChildIsDeadNow();

if (WIFSIGNALED(child_status)) {

char message[999];

snprintf(message, sizeof(message), "Child killed by signal %d",

WTERMSIG(child_status));

isolate->ThrowError(message);

return false;

}

if (WEXITSTATUS(child_status) != 0) {

char message[999];

int exit_status = WEXITSTATUS(child_status);

snprintf(message, sizeof(message), "Child exited with status %d",

exit_status);

isolate->ThrowError(message);

return false;

}

#endif // No waitid call.

return true;

}

#undef HAS_WAITID

// Implementation of the system() function (see d8.h for details).

void Shell::System(const v8::FunctionCallbackInfo<v8::Value>& info) {

DCHECK(i::ValidateCallbackInfo(info));

HandleScope scope(info.GetIsolate());

int read_timeout = -1;

int total_timeout = -1;

if (!GetTimeouts(info, &read_timeout, &total_timeout)) return;

Local<Array> command_args;

if (info.Length() > 1) {

if (!info[1]->IsArray()) {

info.GetIsolate()->ThrowError("system: Argument 2 must be an array");

return;

}

command_args = info[1].As<Array>();

} else {

command_args = Array::New(info.GetIsolate(), 0);

}

if (command_args->Length() > ExecArgs::kMaxArgs) {

info.GetIsolate()->ThrowError("Too many arguments to system()");

return;

}

if (info.Length() < 1) {

info.GetIsolate()->ThrowError("Too few arguments to system()");

return;

}

struct timeval start_time;

gettimeofday(&start_time, nullptr);

ExecArgs exec_args;

if (!exec_args.Init(info.GetIsolate(), info[0], command_args)) {

return;

}

int exec_error_fds[2];

int stdout_fds[2];

if (pipe(exec_error_fds) != 0) {

info.GetIsolate()->ThrowError("pipe syscall failed.");

return;

}

if (pipe(stdout_fds) != 0) {

info.GetIsolate()->ThrowError("pipe syscall failed.");

return;

}

pid_t pid = fork();

if (pid == 0) { // Child process.

ExecSubprocess(exec_error_fds, stdout_fds, exec_args);

exit(1);

}

// Parent process. Ensure that we clean up if we exit this function early.

ZombieProtector child_waiter(pid);

close(exec_error_fds[kWriteFD]);

close(stdout_fds[kWriteFD]);

OpenFDCloser error_read_closer(exec_error_fds[kReadFD]);

OpenFDCloser stdout_read_closer(stdout_fds[kReadFD]);

Isolate* isolate = info.GetIsolate();

if (!ChildLaunchedOK(isolate, exec_error_fds)) return;

Local<Value> accumulator = GetStdout(isolate, stdout_fds[kReadFD], start_time,

read_timeout, total_timeout);

if (accumulator->IsUndefined()) {

kill(pid, SIGINT); // On timeout, kill the subprocess.

info.GetReturnValue().Set(accumulator);

return;

}

if (!WaitForChild(isolate, pid, child_waiter, start_time, read_timeout,

total_timeout)) {

return;

}

info.GetReturnValue().Set(accumulator);

}

void Shell::ChangeDirectory(const v8::FunctionCallbackInfo<v8::Value>& info) {

DCHECK(i::ValidateCallbackInfo(info));

if (info.Length() != 1) {

info.GetIsolate()->ThrowError("chdir() takes one argument");

return;

}

String::Utf8Value directory(info.GetIsolate(), info[0]);

if (*directory == nullptr) {

info.GetIsolate()->ThrowError(

"os.chdir(): String conversion of argument failed.");

return;

}

if (chdir(*directory) != 0) {

info.GetIsolate()->ThrowError(v8_strerror(info.GetIsolate(), errno));

return;

}

}

void Shell::SetUMask(const v8::FunctionCallbackInfo<v8::Value>& info) {

DCHECK(i::ValidateCallbackInfo(info));

if (info.Length() != 1) {

info.GetIsolate()->ThrowError("umask() takes one argument");

return;

}

if (info[0]->IsNumber()) {

int previous = umask(

info[0]->Int32Value(info.GetIsolate()->GetCurrentContext()).FromJust());

info.GetReturnValue().Set(previous);

return;

} else {

info.GetIsolate()->ThrowError("umask() argument must be numeric");

return;

}

}

static bool CheckItsADirectory(Isolate* isolate, char* directory) {

struct stat stat_buf;

int stat_result = stat(directory, &stat_buf);

if (stat_result != 0) {

isolate->ThrowError(v8_strerror(isolate, errno));

return false;

}

if ((stat_buf.st_mode & S_IFDIR) != 0) return true;

isolate->ThrowError(v8_strerror(isolate, EEXIST));

return false;

}

// Returns true for success. Creates intermediate directories as needed. No

// error if the directory exists already.

static bool mkdirp(Isolate* isolate, char* directory, mode_t mask) {

int result = mkdir(directory, mask);

if (result == 0) return true;

if (errno == EEXIST) {

return CheckItsADirectory(isolate, directory);

} else if (errno == ENOENT) { // Intermediate path element is missing.

char* last_slash = strrchr(directory, '/');

if (last_slash == nullptr) {

isolate->ThrowError(v8_strerror(isolate, errno));

return false;

}

*last_slash = 0;

if (!mkdirp(isolate, directory, mask)) return false;

*last_slash = '/';

result = mkdir(directory, mask);

if (result == 0) return true;

if (errno == EEXIST) {

return CheckItsADirectory(isolate, directory);

}

isolate->ThrowError(v8_strerror(isolate, errno));

return false;

} else {

isolate->ThrowError(v8_strerror(isolate, errno));

return false;

}

}

void Shell::MakeDirectory(const v8::FunctionCallbackInfo<v8::Value>& info) {

DCHECK(i::ValidateCallbackInfo(info));

mode_t mask = 0777;

if (info.Length() == 2) {

if (info[1]->IsNumber()) {

mask = info[1]

->Int32Value(info.GetIsolate()->GetCurrentContext())

.FromJust();

} else {

info.GetIsolate()->ThrowError("mkdirp() second argument must be numeric");

return;

}

} else if (info.Length() != 1) {

info.GetIsolate()->ThrowError("mkdirp() takes one or two arguments");

return;

}

String::Utf8Value directory(info.GetIsolate(), info[0]);

if (*directory == nullptr) {

info.GetIsolate()->ThrowError(

"os.mkdirp(): String conversion of argument failed.");

return;

}

mkdirp(info.GetIsolate(), *directory, mask);

}

void Shell::RemoveDirectory(const v8::FunctionCallbackInfo<v8::Value>& info) {

DCHECK(i::ValidateCallbackInfo(info));

if (info.Length() != 1) {

info.GetIsolate()->ThrowError("rmdir() takes one arguments");

return;

}

String::Utf8Value directory(info.GetIsolate(), info[0]);

if (*directory == nullptr) {

info.GetIsolate()->ThrowError(

"os.rmdir(): String conversion of argument failed.");

return;

}

rmdir(*directory);

}

void Shell::SetEnvironment(const v8::FunctionCallbackInfo<v8::Value>& info) {

DCHECK(i::ValidateCallbackInfo(info));

if (info.Length() != 2) {

info.GetIsolate()->ThrowError("setenv() takes two arguments");

return;

}

String::Utf8Value var(info.GetIsolate(), info[0]);

String::Utf8Value value(info.GetIsolate(), info[1]);

if (*var == nullptr) {

info.GetIsolate()->ThrowError(

"os.setenv(): String conversion of variable name failed.");

return;

}

if (*value == nullptr) {

info.GetIsolate()->ThrowError(

"os.setenv(): String conversion of variable contents failed.");

return;

}

setenv(*var, *value, 1);

}

void Shell::UnsetEnvironment(const v8::FunctionCallbackInfo<v8::Value>& info) {

DCHECK(i::ValidateCallbackInfo(info));

if (info.Length() != 1) {

info.GetIsolate()->ThrowError("unsetenv() takes one argument");

return;

}

String::Utf8Value var(info.GetIsolate(), info[0]);

if (*var == nullptr) {

info.GetIsolate()->ThrowError(

"os.setenv(): String conversion of variable name failed.");

return;

}

unsetenv(*var);

}

char* Shell::ReadCharsFromTcpPort(const char* name, int* size_out) {

DCHECK_GE(Shell::options.read_from_tcp_port, 0);

int sockfd = socket(PF_INET, SOCK_STREAM, 0);

if (sockfd < 0) {

fprintf(stderr, "Failed to create IPv4 socket\n");

return nullptr;

}

// Create an address for localhost:PORT where PORT is specified by the shell

// option --read-from-tcp-port.

sockaddr_in serv_addr;

memset(&serv_addr, 0, sizeof(sockaddr_in));

serv_addr.sin_family = AF_INET;

serv_addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);

serv_addr.sin_port = htons(Shell::options.read_from_tcp_port);

if (connect(sockfd, reinterpret_cast<sockaddr*>(&serv_addr),

sizeof(serv_addr)) < 0) {

fprintf(stderr, "Failed to connect to localhost:%d\n",

Shell::options.read_from_tcp_port.get());

close(sockfd);

return nullptr;

}

// The file server follows the simple protocol for requesting and receiving

// a file with a given filename:

//

// REQUEST client -> server: {filename}"\0"

// RESPONSE server -> client: {4-byte file-length}{file contents}

//

// i.e. the request sends the filename with a null terminator, and response

// sends the file contents by sending the length (as a 4-byte big-endian

// value) and the contents.

// If the file length is <0, there was an error sending the file, and the

// rest of the response is undefined (and may, in the future, contain an error

// message). The socket should be closed to avoid trying to interpret the

// undefined data.

// REQUEST

// Send the filename.

size_t sent_len = 0;

size_t name_len = strlen(name) + 1; // Includes the null terminator

while (sent_len < name_len) {

ssize_t sent_now = send(sockfd, name + sent_len, name_len - sent_len, 0);

if (sent_now < 0) {

fprintf(stderr, "Failed to send %s to localhost:%d\n", name,

Shell::options.read_from_tcp_port.get());

close(sockfd);

return nullptr;

}

sent_len += sent_now;

}

// RESPONSE

// Receive the file.

ssize_t received = 0;

// First, read the (zero-terminated) file length.

uint32_t big_endian_file_length;

received = recv(sockfd, &big_endian_file_length, 4, 0);

// We need those 4 bytes to read off the file length.

if (received < 4) {

fprintf(stderr, "Failed to receive %s's length from localhost:%d\n", name,

Shell::options.read_from_tcp_port.get());

close(sockfd);

return nullptr;

}

// Reinterpretet the received file length as a signed big-endian integer.

int32_t file_length = base::bit_cast<int32_t>(htonl(big_endian_file_length));

if (file_length < 0) {

fprintf(stderr, "Received length %d for %s from localhost:%d\n",

file_length, name, Shell::options.read_from_tcp_port.get());

close(sockfd);

return nullptr;

}

// Allocate the output array.

char* chars = new char[file_length];

// Now keep receiving and copying until the whole file is received.

ssize_t total_received = 0;

while (total_received < file_length) {

received =

recv(sockfd, chars + total_received, file_length - total_received, 0);

if (received < 0) {

fprintf(stderr, "Failed to receive %s from localhost:%d\n", name,

Shell::options.read_from_tcp_port.get());

close(sockfd);

delete[] chars;

return nullptr;

}

total_received += received;

}

close(sockfd);

*size_out = file_length;

return chars;

}

void Shell::AddOSMethods(Isolate* isolate, Local<ObjectTemplate> os_templ) {

if (options.enable_os_system) {

os_templ->Set(isolate, "system", FunctionTemplate::New(isolate, System));

}

os_templ->Set(isolate, "chdir",

FunctionTemplate::New(isolate, ChangeDirectory));

os_templ->Set(isolate, "setenv",

FunctionTemplate::New(isolate, SetEnvironment));

os_templ->Set(isolate, "unsetenv",

FunctionTemplate::New(isolate, UnsetEnvironment));

os_templ->Set(isolate, "umask", FunctionTemplate::New(isolate, SetUMask));

os_templ->Set(isolate, "mkdirp",

FunctionTemplate::New(isolate, MakeDirectory));

os_templ->Set(isolate, "rmdir",

FunctionTemplate::New(isolate, RemoveDirectory));

}

} // namespace v8