node/src/node_stdio.cc at master · gembin/node · GitHub

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// Copyright Joyent, Inc. and other Node contributors.

// Permission is hereby granted, free of charge, to any person obtaining a

// copy of this software and associated documentation files (the

// "Software"), to deal in the Software without restriction, including

// without limitation the rights to use, copy, modify, merge, publish,

// distribute, sublicense, and/or sell copies of the Software, and to permit

// persons to whom the Software is furnished to do so, subject to the

// following conditions:

// The above copyright notice and this permission notice shall be included

// in all copies or substantial portions of the Software.

// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS

// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF

// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN

// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,

// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR

// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE

// USE OR OTHER DEALINGS IN THE SOFTWARE.

#include <node_stdio.h>

#include <node_events.h>

#include <unistd.h>

#include <fcntl.h>

#include <string.h>

#include <errno.h>

#if defined(__APPLE__) || defined(__OpenBSD__)

# include <util.h>

#elif __FreeBSD__

# include <libutil.h>

#elif defined(__sun)

# include <stropts.h> // for openpty ioctls

#else

# include <pty.h>

#endif

#include <termios.h>

#include <sys/ioctl.h>

#include <stdlib.h>

using namespace v8;

namespace node {

static int stdout_flags = -1;

static int stdin_flags = -1;

static struct termios orig_termios; /* in order to restore at exit */

static int rawmode = 0; /* for atexit() function to check if restore is needed*/

static int EnableRawMode(int fd) {

struct termios raw;

if (rawmode) return 0;

//if (!isatty(fd)) goto fatal;

if (tcgetattr(fd, &orig_termios) == -1) goto fatal;

raw = orig_termios; /* modify the original mode */

/* input modes: no break, no CR to NL, no parity check, no strip char,

* no start/stop output control. */

raw.c_iflag &= ~(BRKINT | ICRNL | INPCK | ISTRIP | IXON);

/* output modes */

raw.c_oflag |= (ONLCR);

/* control modes - set 8 bit chars */

raw.c_cflag |= (CS8);

/* local modes - choing off, canonical off, no extended functions,

* no signal chars (^Z,^C) */

raw.c_lflag &= ~(ECHO | ICANON | IEXTEN | ISIG);

/* control chars - set return condition: min number of bytes and timer.

* We want read to return every single byte, without timeout. */

raw.c_cc[VMIN] = 1; raw.c_cc[VTIME] = 0; /* 1 byte, no timer */

/* put terminal in raw mode after flushing */

if (tcsetattr(fd, TCSAFLUSH, &raw) < 0) goto fatal;

rawmode = 1;

return 0;

fatal:

errno = ENOTTY;

return -1;

}

void Stdio::DisableRawMode(int fd) {

/* Don't even check the return value as it's too late. */

if (rawmode && tcsetattr(fd, TCSAFLUSH, &orig_termios) != -1) {

rawmode = 0;

}

// process.binding('stdio').setRawMode(true);

static Handle<Value> SetRawMode (const Arguments& args) {

HandleScope scope;

if (args[0]->IsFalse()) {

Stdio::DisableRawMode(STDIN_FILENO);

} else {

if (0 != EnableRawMode(STDIN_FILENO)) {

return ThrowException(ErrnoException(errno, "EnableRawMode"));

}

return rawmode ? True() : False();

}

// process.binding('stdio').getWindowSize(fd);

// returns [row, col]

static Handle<Value> GetWindowSize (const Arguments& args) {

HandleScope scope;

int fd = args[0]->IntegerValue();

struct winsize ws;

if (ioctl(fd, TIOCGWINSZ, &ws) < 0) {

return ThrowException(ErrnoException(errno, "ioctl"));

}

Local<Array> ret = Array::New(2);

ret->Set(0, Integer::NewFromUnsigned(ws.ws_row));

ret->Set(1, Integer::NewFromUnsigned(ws.ws_col));

return scope.Close(ret);

}

// process.binding('stdio').setWindowSize(fd, row, col);

static Handle<Value> SetWindowSize (const Arguments& args) {

HandleScope scope;

int fd = args[0]->IntegerValue();

int row = args[1]->IntegerValue();

int col = args[2]->IntegerValue();

struct winsize ws;

ws.ws_row = row;

ws.ws_col = col;

ws.ws_xpixel = 0;

ws.ws_ypixel = 0;

if (ioctl(fd, TIOCSWINSZ, &ws) < 0) {

return ThrowException(ErrnoException(errno, "ioctl"));

}

return True();

}

static Handle<Value> IsATTY (const Arguments& args) {

HandleScope scope;

int fd = args[0]->IntegerValue();

int r = isatty(fd);

return scope.Close(r ? True() : False());

}

/* STDERR IS ALWAY SYNC ALWAYS UTF8 */

static Handle<Value>

WriteError (const Arguments& args)

{

HandleScope scope;

if (args.Length() < 1)

return Undefined();

String::Utf8Value msg(args[0]->ToString());

ssize_t r;

size_t written = 0;

while (written < (size_t) msg.length()) {

r = write(STDERR_FILENO, (*msg) + written, msg.length() - written);

if (r < 0) {

if (errno == EAGAIN || errno == EIO) {

usleep(100);

continue;

}

return ThrowException(ErrnoException(errno, "write"));

}

written += (size_t)r;

}

return Undefined();

}

static Handle<Value> OpenStdin(const Arguments& args) {

HandleScope scope;

if (isatty(STDIN_FILENO)) {

// XXX selecting on tty fds wont work in windows.

// Must ALWAYS make a coupling on shitty platforms.

stdin_flags = fcntl(STDIN_FILENO, F_GETFL, 0);

if (stdin_flags == -1) {

// TODO DRY

return ThrowException(Exception::Error(String::New("fcntl error!")));

}

int r = fcntl(STDIN_FILENO, F_SETFL, stdin_flags | O_NONBLOCK);

if (r == -1) {

// TODO DRY

return ThrowException(Exception::Error(String::New("fcntl error!")));

}

return scope.Close(Integer::New(STDIN_FILENO));

}

static bool IsBlocking(int fd) {

if (isatty(fd)) return false;

struct stat s;

if (fstat(fd, &s)) {

perror("fstat");

return true;

}

return !S_ISSOCK(s.st_mode) && !S_ISFIFO(s.st_mode);

}

static Handle<Value> IsStdinBlocking(const Arguments& arg) {

return IsBlocking(STDIN_FILENO) ? True() : False();

}

static Handle<Value> IsStdoutBlocking(const Arguments& args) {

return IsBlocking(STDOUT_FILENO) ? True() : False();

}

static Handle<Value> OpenPTY(const Arguments& args) {

HandleScope scope;

int master_fd, slave_fd;

#ifdef __sun

typedef void (*sighandler)(int);

// TODO move to platform files.

master_fd = open("/dev/ptmx", O_RDWR | O_NOCTTY);

sighandler sig_saved = signal(SIGCHLD, SIG_DFL);

grantpt(master_fd);

unlockpt(master_fd);

signal(SIGCHLD, sig_saved);

char *slave_name = ptsname(master_fd);

slave_fd = open(slave_name, O_RDWR);

ioctl(slave_fd, I_PUSH, "ptem");

ioctl(slave_fd, I_PUSH, "ldterm");

ioctl(slave_fd, I_PUSH, "ttcompat");

#else

int r = openpty(&master_fd, &slave_fd, NULL, NULL, NULL);

if (r == -1) {

return ThrowException(ErrnoException(errno, "openpty"));

}

#endif

Local<Array> a = Array::New(2);

a->Set(0, Integer::New(master_fd));

a->Set(1, Integer::New(slave_fd));

return scope.Close(a);

}

void Stdio::Flush() {

if (stdin_flags != -1) {

fcntl(STDIN_FILENO, F_SETFL, stdin_flags & ~O_NONBLOCK);

}

if (stdout_flags != -1) {

fcntl(STDOUT_FILENO, F_SETFL, stdout_flags & ~O_NONBLOCK);

}

fflush(stdout);

fflush(stderr);

}

static void HandleSIGCONT (int signum) {

if (rawmode) {

rawmode = 0;

EnableRawMode(STDIN_FILENO);

}

void Stdio::Initialize(v8::Handle<v8::Object> target) {

HandleScope scope;

if (isatty(STDOUT_FILENO)) {

// XXX selecting on tty fds wont work in windows.

// Must ALWAYS make a coupling on shitty platforms.

stdout_flags = fcntl(STDOUT_FILENO, F_GETFL, 0);

fcntl(STDOUT_FILENO, F_SETFL, stdout_flags | O_NONBLOCK);

}

target->Set(String::NewSymbol("stdoutFD"), Integer::New(STDOUT_FILENO));

target->Set(String::NewSymbol("stderrFD"), Integer::New(STDERR_FILENO));

target->Set(String::NewSymbol("stdinFD"), Integer::New(STDIN_FILENO));

NODE_SET_METHOD(target, "writeError", WriteError);

NODE_SET_METHOD(target, "openStdin", OpenStdin);

NODE_SET_METHOD(target, "isStdoutBlocking", IsStdoutBlocking);

NODE_SET_METHOD(target, "isStdinBlocking", IsStdinBlocking);

NODE_SET_METHOD(target, "setRawMode", SetRawMode);

NODE_SET_METHOD(target, "getWindowSize", GetWindowSize);

NODE_SET_METHOD(target, "setWindowSize", SetWindowSize);

NODE_SET_METHOD(target, "isatty", IsATTY);

NODE_SET_METHOD(target, "openpty", OpenPTY);

struct sigaction sa;

memset(&sa, 0, sizeof(sa));

sa.sa_handler = HandleSIGCONT;

sigaction(SIGCONT, &sa, NULL);

}

} // namespace node

NODE_MODULE(node_stdio, node::Stdio::Initialize);

node/src/node_stdio.cc at master · gembin/node · GitHub

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