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#include "node.h"
#include "node_internals.h"
#include "env-inl.h"
#include "util-inl.h"
#include "uv.h"
#include "v8.h"
#include <limits.h> // PATH_MAX
#include <stdio.h>
#if defined(_MSC_VER)
#include <direct.h>
#include <io.h>
#define umask _umask
typedef int mode_t;
#else
#include <pthread.h>
#include <sys/resource.h> // getrlimit, setrlimit
#include <termios.h> // tcgetattr, tcsetattr
#include <unistd.h> // setuid, getuid
#endif
#if defined(__POSIX__) && !defined(__ANDROID__) && !defined(__CloudABI__)
#include <pwd.h> // getpwnam()
#include <grp.h> // getgrnam()
#endif
namespace node {
using v8::Array;
using v8::ArrayBuffer;
using v8::BigUint64Array;
using v8::Float64Array;
using v8::FunctionCallbackInfo;
using v8::HeapStatistics;
using v8::Integer;
using v8::Isolate;
using v8::Local;
using v8::Number;
using v8::String;
using v8::Uint32;
using v8::Uint32Array;
using v8::Value;
// Microseconds in a second, as a float, used in CPUUsage() below
#define MICROS_PER_SEC 1e6
// used in Hrtime() below
#define NANOS_PER_SEC 1000000000
void Abort(const FunctionCallbackInfo<Value>& args) {
Abort();
}
void Chdir(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
CHECK(env->is_main_thread());
if (args.Length() != 1 || !args[0]->IsString())
return env->ThrowTypeError("Bad argument.");
Utf8Value path(args.GetIsolate(), args[0]);
int err = uv_chdir(*path);
if (err)
return env->ThrowUVException(err, "chdir", nullptr, *path, nullptr);
}
// CPUUsage use libuv's uv_getrusage() this-process resource usage accessor,
// to access ru_utime (user CPU time used) and ru_stime (system CPU time used),
// which are uv_timeval_t structs (long tv_sec, long tv_usec).
// Returns those values as Float64 microseconds in the elements of the array
// passed to the function.
void CPUUsage(const FunctionCallbackInfo<Value>& args) {
uv_rusage_t rusage;
// Call libuv to get the values we'll return.
int err = uv_getrusage(&rusage);
if (err) {
// On error, return the strerror version of the error code.
Local<String> errmsg = OneByteString(args.GetIsolate(), uv_strerror(err));
return args.GetReturnValue().Set(errmsg);
}
// Get the double array pointer from the Float64Array argument.
CHECK(args[0]->IsFloat64Array());
Local<Float64Array> array = args[0].As<Float64Array>();
CHECK_EQ(array->Length(), 2);
Local<ArrayBuffer> ab = array->Buffer();
double* fields = static_cast<double*>(ab->GetContents().Data());
// Set the Float64Array elements to be user / system values in microseconds.
fields[0] = MICROS_PER_SEC * rusage.ru_utime.tv_sec + rusage.ru_utime.tv_usec;
fields[1] = MICROS_PER_SEC * rusage.ru_stime.tv_sec + rusage.ru_stime.tv_usec;
}
void Cwd(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
#ifdef _WIN32
/* MAX_PATH is in characters, not bytes. Make sure we have enough headroom. */
char buf[MAX_PATH * 4];
#else
char buf[PATH_MAX];
#endif
size_t cwd_len = sizeof(buf);
int err = uv_cwd(buf, &cwd_len);
if (err)
return env->ThrowUVException(err, "uv_cwd");
Local<String> cwd = String::NewFromUtf8(env->isolate(),
buf,
v8::NewStringType::kNormal,
cwd_len).ToLocalChecked();
args.GetReturnValue().Set(cwd);
}
// Hrtime exposes libuv's uv_hrtime() high-resolution timer.
// This is the legacy version of hrtime before BigInt was introduced in
// JavaScript.
// The value returned by uv_hrtime() is a 64-bit int representing nanoseconds,
// so this function instead fills in an Uint32Array with 3 entries,
// to avoid any integer overflow possibility.
// The first two entries contain the second part of the value
// broken into the upper/lower 32 bits to be converted back in JS,
// because there is no Uint64Array in JS.
// The third entry contains the remaining nanosecond part of the value.
void Hrtime(const FunctionCallbackInfo<Value>& args) {
uint64_t t = uv_hrtime();
Local<ArrayBuffer> ab = args[0].As<Uint32Array>()->Buffer();
uint32_t* fields = static_cast<uint32_t*>(ab->GetContents().Data());
fields[0] = (t / NANOS_PER_SEC) >> 32;
fields[1] = (t / NANOS_PER_SEC) & 0xffffffff;
fields[2] = t % NANOS_PER_SEC;
}
void HrtimeBigInt(const FunctionCallbackInfo<Value>& args) {
Local<ArrayBuffer> ab = args[0].As<BigUint64Array>()->Buffer();
uint64_t* fields = static_cast<uint64_t*>(ab->GetContents().Data());
fields[0] = uv_hrtime();
}
void Kill(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
if (args.Length() != 2)
return env->ThrowError("Bad argument.");
int pid = args[0]->Int32Value();
int sig = args[1]->Int32Value();
int err = uv_kill(pid, sig);
args.GetReturnValue().Set(err);
}
void MemoryUsage(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
size_t rss;
int err = uv_resident_set_memory(&rss);
if (err)
return env->ThrowUVException(err, "uv_resident_set_memory");
Isolate* isolate = env->isolate();
// V8 memory usage
HeapStatistics v8_heap_stats;
isolate->GetHeapStatistics(&v8_heap_stats);
// Get the double array pointer from the Float64Array argument.
CHECK(args[0]->IsFloat64Array());
Local<Float64Array> array = args[0].As<Float64Array>();
CHECK_EQ(array->Length(), 4);
Local<ArrayBuffer> ab = array->Buffer();
double* fields = static_cast<double*>(ab->GetContents().Data());
fields[0] = rss;
fields[1] = v8_heap_stats.total_heap_size();
fields[2] = v8_heap_stats.used_heap_size();
fields[3] = isolate->AdjustAmountOfExternalAllocatedMemory(0);
}
// Most of the time, it's best to use `console.error` to write
// to the process.stderr stream. However, in some cases, such as
// when debugging the stream.Writable class or the process.nextTick
// function, it is useful to bypass JavaScript entirely.
void RawDebug(const FunctionCallbackInfo<Value>& args) {
CHECK(args.Length() == 1 && args[0]->IsString() &&
"must be called with a single string");
Utf8Value message(args.GetIsolate(), args[0]);
PrintErrorString("%s\n", *message);
fflush(stderr);
}
void StartProfilerIdleNotifier(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
env->StartProfilerIdleNotifier();
}
void StopProfilerIdleNotifier(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
env->StopProfilerIdleNotifier();
}
void Umask(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
uint32_t old;
if (args.Length() < 1 || args[0]->IsUndefined()) {
old = umask(0);
umask(static_cast<mode_t>(old));
} else if (!args[0]->IsInt32() && !args[0]->IsString()) {
return env->ThrowTypeError("argument must be an integer or octal string.");
} else {
int oct;
if (args[0]->IsInt32()) {
oct = args[0]->Uint32Value();
} else {
oct = 0;
Utf8Value str(env->isolate(), args[0]);
// Parse the octal string.
for (size_t i = 0; i < str.length(); i++) {
char c = (*str)[i];
if (c > '7' || c < '0')
return env->ThrowTypeError("invalid octal string");
oct *= 8;
oct += c - '0';
}
}
old = umask(static_cast<mode_t>(oct));
}
args.GetReturnValue().Set(old);
}
void Uptime(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
double uptime;
uv_update_time(env->event_loop());
uptime = uv_now(env->event_loop()) - prog_start_time;
args.GetReturnValue().Set(Number::New(env->isolate(), uptime / 1000));
}
#if defined(__POSIX__) && !defined(__ANDROID__) && !defined(__CloudABI__)
static const uid_t uid_not_found = static_cast<uid_t>(-1);
static const gid_t gid_not_found = static_cast<gid_t>(-1);
static uid_t uid_by_name(const char* name) {
struct passwd pwd;
struct passwd* pp;
char buf[8192];
errno = 0;
pp = nullptr;
if (getpwnam_r(name, &pwd, buf, sizeof(buf), &pp) == 0 && pp != nullptr)
return pp->pw_uid;
return uid_not_found;
}
static char* name_by_uid(uid_t uid) {
struct passwd pwd;
struct passwd* pp;
char buf[8192];
int rc;
errno = 0;
pp = nullptr;
if ((rc = getpwuid_r(uid, &pwd, buf, sizeof(buf), &pp)) == 0 &&
pp != nullptr) {
return strdup(pp->pw_name);
}
if (rc == 0)
errno = ENOENT;
return nullptr;
}
static gid_t gid_by_name(const char* name) {
struct group pwd;
struct group* pp;
char buf[8192];
errno = 0;
pp = nullptr;
if (getgrnam_r(name, &pwd, buf, sizeof(buf), &pp) == 0 && pp != nullptr)
return pp->gr_gid;
return gid_not_found;
}
#if 0 // For future use.
static const char* name_by_gid(gid_t gid) {
struct group pwd;
struct group* pp;
char buf[8192];
int rc;
errno = 0;
pp = nullptr;
if ((rc = getgrgid_r(gid, &pwd, buf, sizeof(buf), &pp)) == 0 &&
pp != nullptr) {
return strdup(pp->gr_name);
}
if (rc == 0) {
errno = ENOENT;
}
return nullptr;
}
#endif
static uid_t uid_by_name(Isolate* isolate, Local<Value> value) {
if (value->IsUint32()) {
return static_cast<uid_t>(value->Uint32Value());
} else {
Utf8Value name(isolate, value);
return uid_by_name(*name);
}
}
static gid_t gid_by_name(Isolate* isolate, Local<Value> value) {
if (value->IsUint32()) {
return static_cast<gid_t>(value->Uint32Value());
} else {
Utf8Value name(isolate, value);
return gid_by_name(*name);
}
}
void GetUid(const FunctionCallbackInfo<Value>& args) {
// uid_t is an uint32_t on all supported platforms.
args.GetReturnValue().Set(static_cast<uint32_t>(getuid()));
}
void GetGid(const FunctionCallbackInfo<Value>& args) {
// gid_t is an uint32_t on all supported platforms.
args.GetReturnValue().Set(static_cast<uint32_t>(getgid()));
}
void GetEUid(const FunctionCallbackInfo<Value>& args) {
// uid_t is an uint32_t on all supported platforms.
args.GetReturnValue().Set(static_cast<uint32_t>(geteuid()));
}
void GetEGid(const FunctionCallbackInfo<Value>& args) {
// gid_t is an uint32_t on all supported platforms.
args.GetReturnValue().Set(static_cast<uint32_t>(getegid()));
}
void SetGid(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
CHECK(env->is_main_thread());
if (!args[0]->IsUint32() && !args[0]->IsString())
return env->ThrowTypeError("setgid argument must be a number or a string");
gid_t gid = gid_by_name(env->isolate(), args[0]);
if (gid == gid_not_found)
return env->ThrowError("setgid group id does not exist");
if (setgid(gid))
return env->ThrowErrnoException(errno, "setgid");
}
void SetEGid(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
CHECK(env->is_main_thread());
if (!args[0]->IsUint32() && !args[0]->IsString())
return env->ThrowTypeError("setegid argument must be a number or string");
gid_t gid = gid_by_name(env->isolate(), args[0]);
if (gid == gid_not_found)
return env->ThrowError("setegid group id does not exist");
if (setegid(gid))
return env->ThrowErrnoException(errno, "setegid");
}
void SetUid(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
CHECK(env->is_main_thread());
if (!args[0]->IsUint32() && !args[0]->IsString())
return env->ThrowTypeError("setuid argument must be a number or a string");
uid_t uid = uid_by_name(env->isolate(), args[0]);
if (uid == uid_not_found)
return env->ThrowError("setuid user id does not exist");
if (setuid(uid))
return env->ThrowErrnoException(errno, "setuid");
}
void SetEUid(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
CHECK(env->is_main_thread());
if (!args[0]->IsUint32() && !args[0]->IsString())
return env->ThrowTypeError("seteuid argument must be a number or string");
uid_t uid = uid_by_name(env->isolate(), args[0]);
if (uid == uid_not_found)
return env->ThrowError("seteuid user id does not exist");
if (seteuid(uid))
return env->ThrowErrnoException(errno, "seteuid");
}
void GetGroups(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
int ngroups = getgroups(0, nullptr);
if (ngroups == -1)
return env->ThrowErrnoException(errno, "getgroups");
gid_t* groups = new gid_t[ngroups];
ngroups = getgroups(ngroups, groups);
if (ngroups == -1) {
delete[] groups;
return env->ThrowErrnoException(errno, "getgroups");
}
Local<Array> groups_list = Array::New(env->isolate(), ngroups);
bool seen_egid = false;
gid_t egid = getegid();
for (int i = 0; i < ngroups; i++) {
groups_list->Set(i, Integer::New(env->isolate(), groups[i]));
if (groups[i] == egid)
seen_egid = true;
}
delete[] groups;
if (seen_egid == false)
groups_list->Set(ngroups, Integer::New(env->isolate(), egid));
args.GetReturnValue().Set(groups_list);
}
void SetGroups(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
if (!args[0]->IsArray())
return env->ThrowTypeError("argument 1 must be an array");
Local<Array> groups_list = args[0].As<Array>();
size_t size = groups_list->Length();
gid_t* groups = new gid_t[size];
for (size_t i = 0; i < size; i++) {
gid_t gid = gid_by_name(env->isolate(), groups_list->Get(i));
if (gid == gid_not_found) {
delete[] groups;
return env->ThrowError("group name not found");
}
groups[i] = gid;
}
int rc = setgroups(size, groups);
delete[] groups;
if (rc == -1)
return env->ThrowErrnoException(errno, "setgroups");
}
void InitGroups(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
if (!args[0]->IsUint32() && !args[0]->IsString())
return env->ThrowTypeError("argument 1 must be a number or a string");
if (!args[1]->IsUint32() && !args[1]->IsString())
return env->ThrowTypeError("argument 2 must be a number or a string");
Utf8Value arg0(env->isolate(), args[0]);
gid_t extra_group;
bool must_free;
char* user;
if (args[0]->IsUint32()) {
user = name_by_uid(args[0]->Uint32Value());
must_free = true;
} else {
user = *arg0;
must_free = false;
}
if (user == nullptr)
return env->ThrowError("initgroups user not found");
extra_group = gid_by_name(env->isolate(), args[1]);
if (extra_group == gid_not_found) {
if (must_free)
free(user);
return env->ThrowError("initgroups extra group not found");
}
int rc = initgroups(user, extra_group);
if (must_free)
free(user);
if (rc)
return env->ThrowErrnoException(errno, "initgroups");
}
#endif // __POSIX__ && !defined(__ANDROID__) && !defined(__CloudABI__)
} // namespace node