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Copy pathnode_stdio.cc
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294 lines (219 loc) · 6.99 KB
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#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').getColumns();
static Handle<Value> GetColumns (const Arguments& args) {
HandleScope scope;
struct winsize ws;
if (ioctl(1, TIOCGWINSZ, &ws) == -1) {
return scope.Close(Integer::New(80));
}
return scope.Close(Integer::NewFromUnsigned(ws.ws_col));
}
// process.binding('stdio').getRows();
static Handle<Value> GetRows (const Arguments& args) {
HandleScope scope;
struct winsize ws;
if (ioctl(1, TIOCGWINSZ, &ws) == -1) {
return scope.Close(Integer::New(132));
}
return scope.Close(Integer::NewFromUnsigned(ws.ws_row));
}
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, "getColumns", GetColumns);
NODE_SET_METHOD(target, "getRows", GetRows);
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);