int uv_tty_init(uv_loop_t* loop, uv_tty_t* tty, int fd, int readable) {
uv__stream_init(loop, (uv_stream_t*)tty, UV_TTY);
if (readable) {
uv__nonblock(fd, 1);
uv__stream_open((uv_stream_t*)tty, fd, UV_STREAM_READABLE);
} else {
/* Note: writable tty we set to blocking mode. */
uv__stream_open((uv_stream_t*)tty, fd, UV_STREAM_WRITABLE);
tty->flags |= UV_STREAM_BLOCKING;
}
tty->mode = 0;
return 0;
}
int uv_device_open(uv_loop_t* loop,
uv_device_t* device,
uv_os_fd_t fd,
int flags) {
int err;
int stream_flags = 0;
assert(device);
if (flags != O_RDONLY && flags != O_WRONLY && flags != O_RDWR) {
return -EINVAL;
}
uv__stream_init(loop, (uv_stream_t*) device, UV_DEVICE);
if (flags & O_RDONLY) {
stream_flags |= UV_STREAM_READABLE;
} else if (flags & O_WRONLY) {
stream_flags |= UV_STREAM_WRITABLE;
} else if (flags & O_RDWR) {
stream_flags |= UV_STREAM_READABLE | UV_STREAM_WRITABLE;
}
err = uv__nonblock(fd, 1);
if (err) {
return err;
}
err = uv__stream_open((uv_stream_t*) device, fd, stream_flags);
if (err) {
return err;
}
return 0;
}
void uv_pipe_connect(uv_connect_t* req,
uv_pipe_t* handle,
const char* name,
uv_connect_cb cb) {
struct sockaddr_un saddr;
int saved_errno;
int new_sock;
int err;
int r;
saved_errno = errno;
new_sock = (handle->fd == -1);
err = -1;
if (new_sock)
if ((handle->fd = uv__socket(AF_UNIX, SOCK_STREAM, 0)) == -1)
goto out;
memset(&saddr, 0, sizeof saddr);
uv_strlcpy(saddr.sun_path, name, sizeof(saddr.sun_path));
saddr.sun_family = AF_UNIX;
/* We don't check for EINPROGRESS. Think about it: the socket
* is either there or not.
*/
do {
r = connect(handle->fd, (struct sockaddr*)&saddr, sizeof saddr);
}
while (r == -1 && errno == EINTR);
if (r == -1)
goto out;
if (new_sock)
if (uv__stream_open((uv_stream_t*)handle,
handle->fd,
UV_STREAM_READABLE | UV_STREAM_WRITABLE))
goto out;
uv__io_start(handle->loop, &handle->read_watcher);
uv__io_start(handle->loop, &handle->write_watcher);
err = 0;
out:
handle->delayed_error = err ? errno : 0; /* Passed to callback. */
handle->connect_req = req;
uv__req_init(handle->loop, req, UV_CONNECT);
req->handle = (uv_stream_t*)handle;
req->cb = cb;
ngx_queue_init(&req->queue);
/* Run callback on next tick. */
uv__io_feed(handle->loop, &handle->write_watcher, UV__IO_WRITE);
/* Mimic the Windows pipe implementation, always
* return 0 and let the callback handle errors.
*/
errno = saved_errno;
}
int uv_pipe_open(uv_pipe_t* handle, uv_os_fd_t fd) {
int flags;
int mode;
int err;
flags = 0;
if (uv__fd_exists(handle->loop, fd))
return UV_EEXIST;
do
mode = fcntl(fd, F_GETFL);
while (mode == -1 && errno == EINTR);
if (mode == -1)
return UV__ERR(errno); /* according to docs, must be EBADF */
err = uv__nonblock(fd, 1);
if (err)
return err;
#if defined(__APPLE__)
err = uv__stream_try_select((uv_stream_t*) handle, &fd);
if (err)
return err;
#endif /* defined(__APPLE__) */
mode &= O_ACCMODE;
if (mode != O_WRONLY)
flags |= UV_HANDLE_READABLE;
if (mode != O_RDONLY)
flags |= UV_HANDLE_WRITABLE;
return uv__stream_open((uv_stream_t*)handle, fd, flags);
}
static int uv__process_open_stream(uv_stdio_container_t* container,
int pipefds[2],
int writable) {
int flags;
if (!(container->flags & UV_CREATE_PIPE) || pipefds[0] < 0)
return 0;
if (uv__close(pipefds[1]))
if (errno != EINTR && errno != EINPROGRESS)
abort();
pipefds[1] = -1;
uv__nonblock(pipefds[0], 1);
if (container->data.stream->type == UV_NAMED_PIPE &&
((uv_pipe_t*)container->data.stream)->ipc)
flags = UV_STREAM_READABLE | UV_STREAM_WRITABLE;
else if (writable)
flags = UV_STREAM_WRITABLE;
else
flags = UV_STREAM_READABLE;
return uv__stream_open(container->data.stream, pipefds[0], flags);
}
int uv_tty_init(uv_loop_t* loop, uv_tty_t* tty, int fd, int readable) {
uv__stream_init(loop, (uv_stream_t*)tty, UV_TTY);
if (readable) {
uv__nonblock(fd, 1);
uv__stream_open((uv_stream_t*)tty, fd, UV_READABLE);
} else {
/* Note: writable tty we set to blocking mode. */
uv__stream_open((uv_stream_t*)tty, fd, UV_WRITABLE);
tty->blocking = 1;
}
loop->counters.tty_init++;
tty->mode = 0;
return 0;
}
void uv_pipe_connect(uv_connect_t* req,
uv_pipe_t* handle,
const char* name,
uv_connect_cb cb) {
struct sockaddr_un saddr;
int saved_errno;
int new_sock;
int err;
int r;
saved_errno = errno;
new_sock = (uv__stream_fd(handle) == -1);
err = -1;
if (new_sock)
if ((handle->io_watcher.fd = uv__socket(AF_UNIX, SOCK_STREAM, 0)) == -1)
goto out;
memset(&saddr, 0, sizeof saddr);
uv_strlcpy(saddr.sun_path, name, sizeof(saddr.sun_path));
saddr.sun_family = AF_UNIX;
do {
r = connect(uv__stream_fd(handle),
(struct sockaddr*)&saddr, sizeof saddr);
}
while (r == -1 && errno == EINTR);
if (r == -1)
if (errno != EINPROGRESS)
goto out;
if (new_sock)
if (uv__stream_open((uv_stream_t*)handle,
uv__stream_fd(handle),
UV_STREAM_READABLE | UV_STREAM_WRITABLE))
goto out;
uv__io_start(handle->loop, &handle->io_watcher, UV__POLLIN | UV__POLLOUT);
err = 0;
out:
handle->delayed_error = err ? errno : 0; /* Passed to callback. */
handle->connect_req = req;
uv__req_init(handle->loop, req, UV_CONNECT);
req->handle = (uv_stream_t*)handle;
req->cb = cb;
QUEUE_INIT(&req->queue);
/* Force callback to run on next tick in case of error. */
if (err != 0)
uv__io_feed(handle->loop, &handle->io_watcher);
/* Mimic the Windows pipe implementation, always
* return 0 and let the callback handle errors.
*/
errno = saved_errno;
}
int uv_pipe_open(uv_pipe_t* handle, uv_file fd) {
#if defined(__APPLE__)
if (uv__stream_try_select((uv_stream_t*) handle, &fd))
return -1;
#endif /* defined(__APPLE__) */
return uv__stream_open((uv_stream_t*)handle,
fd,
UV_STREAM_READABLE | UV_STREAM_WRITABLE);
}
int uv_tcp_open(uv_tcp_t* handle, uv_os_sock_t sock) {
int err;
err = uv__nonblock(sock, 1);
if (err)
return err;
return uv__stream_open((uv_stream_t*)handle,
sock,
UV_STREAM_READABLE | UV_STREAM_WRITABLE);
}
int uv_tty_init(uv_loop_t* loop, uv_tty_t* tty, int fd, int readable) {
uv__stream_init(loop, (uv_stream_t*)tty, UV_TTY);
#if defined(__APPLE__)
if (uv__stream_try_select((uv_stream_t*) tty, &fd))
return -1;
#endif /* defined(__APPLE__) */
if (readable) {
uv__nonblock(fd, 1);
uv__stream_open((uv_stream_t*)tty, fd, UV_STREAM_READABLE);
} else {
/* Note: writable tty we set to blocking mode. */
uv__stream_open((uv_stream_t*)tty, fd, UV_STREAM_WRITABLE);
tty->flags |= UV_STREAM_BLOCKING;
}
tty->mode = 0;
return 0;
}
int uv_accept(uv_stream_t* server, uv_stream_t* client) {
uv_stream_t* streamServer;
uv_stream_t* streamClient;
int saved_errno;
int status;
/* TODO document this */
assert(server->loop == client->loop);
saved_errno = errno;
status = -1;
streamServer = (uv_stream_t*)server;
streamClient = (uv_stream_t*)client;
if (streamServer->accepted_fd < 0) {
uv__set_sys_error(server->loop, EAGAIN);
goto out;
}
switch (streamClient->type) {
case UV_NAMED_PIPE:
case UV_TCP:
if (uv__stream_open(streamClient, streamServer->accepted_fd,
UV_STREAM_READABLE | UV_STREAM_WRITABLE)) {
/* TODO handle error */
close(streamServer->accepted_fd);
streamServer->accepted_fd = -1;
goto out;
}
break;
case UV_UDP:
if (uv_udp_open((uv_udp_t*) client, streamServer->accepted_fd)) {
close(streamServer->accepted_fd);
streamServer->accepted_fd = -1;
goto out;
}
break;
default:
assert(0);
}
uv__io_start(streamServer->loop, &streamServer->io_watcher, UV__POLLIN);
streamServer->accepted_fd = -1;
status = 0;
out:
errno = saved_errno;
return status;
}
int uv_tty_init(uv_loop_t* loop, uv_tty_t* tty, int fd, int readable) {
int flags;
int newfd;
int r;
uv__stream_init(loop, (uv_stream_t*)tty, UV_TTY);
/* Reopen the file descriptor when it refers to a tty. This lets us put the
* tty in non-blocking mode without affecting other processes that share it
* with us.
*
* Example: `node | cat` - if we put our fd 0 in non-blocking mode, it also
* affects fd 1 of `cat` because both file descriptors refer to the same
* struct file in the kernel. When we reopen our fd 0, it points to a
* different struct file, hence changing its properties doesn't affect
* other processes.
*/
if (isatty(fd)) {
newfd = open("/dev/tty", O_RDWR);
if (newfd == -1)
return uv__set_sys_error(loop, errno);
do
r = dup2(newfd, fd);
while (r == -1 && (errno == EINTR || errno == EBUSY));
/* EINVAL means newfd == fd which could conceivably happen if another
* thread called close(fd) between our calls to isatty() and open().
* That's a rather unlikely event but let's handle it anyway.
*/
if (r == -1 && errno != EINVAL) {
close(newfd);
return uv__set_sys_error(loop, errno);
}
fd = newfd;
}
if (readable)
flags = UV_STREAM_READABLE;
else
flags = UV_STREAM_WRITABLE;
uv__nonblock(fd, 1);
uv__stream_open((uv_stream_t*)tty, fd, flags);
tty->mode = 0;
return 0;
}
int uv_pipe_open(uv_pipe_t* handle, uv_os_fd_t fd) {
int err;
err = uv__nonblock(fd, 1);
if (err)
return err;
#if defined(__APPLE__)
err = uv__stream_try_select((uv_stream_t*) handle, &fd);
if (err)
return err;
#endif /* defined(__APPLE__) */
return uv__stream_open((uv_stream_t*)handle,
fd,
UV_STREAM_READABLE | UV_STREAM_WRITABLE);
}
static int maybe_new_socket(uv_tcp_t* handle, int domain, int flags) {
int sockfd;
if (uv__stream_fd(handle) != -1)
return 0;
sockfd = uv__socket(domain, SOCK_STREAM, 0);
if (sockfd == -1)
return uv__set_sys_error(handle->loop, errno);
if (uv__stream_open((uv_stream_t*)handle, sockfd, flags)) {
close(sockfd);
return -1;
}
return 0;
}
static int uv__bind(uv_tcp_t* tcp,
int domain,
struct sockaddr* addr,
int addrsize) {
int saved_errno;
int status;
saved_errno = errno;
status = -1;
if (tcp->fd < 0) {
if ((tcp->fd = uv__socket(domain, SOCK_STREAM, 0)) == -1) {
uv__set_sys_error(tcp->loop, errno);
goto out;
}
if (uv__stream_open((uv_stream_t*)tcp,
tcp->fd,
UV_STREAM_READABLE | UV_STREAM_WRITABLE)) {
close(tcp->fd);
tcp->fd = -1;
status = -2;
goto out;
}
}
assert(tcp->fd >= 0);
tcp->delayed_error = 0;
if (bind(tcp->fd, addr, addrsize) == -1) {
if (errno == EADDRINUSE) {
tcp->delayed_error = errno;
} else {
uv__set_sys_error(tcp->loop, errno);
goto out;
}
}
status = 0;
out:
errno = saved_errno;
return status;
}
static int uv__process_open_stream(uv_stdio_container_t* container, int fds[2],
int writable) {
int fd = fds[writable ? 1 : 0];
int child_fd = fds[writable ? 0 : 1];
int flags;
/* No need to create stream */
if (!(container->flags & UV_CREATE_PIPE) || fd < 0) {
return 0;
}
assert(child_fd >= 0);
close(child_fd);
uv__nonblock(fd, 1);
flags = uv__process_stdio_flags(container, writable);
return uv__stream_open((uv_stream_t*)container->data.stream, fd, flags);
}
static int maybe_new_socket(uv_tcp_t* handle, int domain, int flags) {
int sockfd;
int err;
if (uv__stream_fd(handle) != -1)
return 0;
err = uv__socket(domain, SOCK_STREAM, 0);
if (err < 0)
return err;
sockfd = err;
err = uv__stream_open((uv_stream_t*) handle, sockfd, flags);
if (err) {
close(sockfd);
return err;
}
return 0;
}
int uv_tcp_listen(uv_tcp_t* tcp, int backlog, uv_connection_cb cb) {
int r;
if (tcp->delayed_error) {
uv__set_sys_error(tcp->loop, tcp->delayed_error);
return -1;
}
if (tcp->fd < 0) {
if ((tcp->fd = uv__socket(AF_INET, SOCK_STREAM, 0)) == -1) {
uv__set_sys_error(tcp->loop, errno);
return -1;
}
if (uv__stream_open((uv_stream_t*)tcp, tcp->fd, UV_READABLE)) {
uv__close(tcp->fd);
tcp->fd = -1;
return -1;
}
}
assert(tcp->fd >= 0);
r = listen(tcp->fd, backlog);
if (r < 0) {
uv__set_sys_error(tcp->loop, errno);
return -1;
}
tcp->connection_cb = cb;
/* Start listening for connections. */
uv__io_watcher_start(
(uv_handle_t*)tcp,
&tcp->io,
&tcp->io.read_watcher,
uv__server_io);
return 0;
}
static int uv__process_open_stream(uv_stdio_container_t* container,
int pipefds[2]) {
int flags;
int err;
if (!(container->flags & UV_CREATE_PIPE) || pipefds[0] < 0)
return 0;
err = uv__close(pipefds[1]);
if (err != 0)
abort();
pipefds[1] = -1;
uv__nonblock(pipefds[0], 1);
flags = 0;
if (container->flags & UV_WRITABLE_PIPE)
flags |= UV_HANDLE_READABLE;
if (container->flags & UV_READABLE_PIPE)
flags |= UV_HANDLE_WRITABLE;
return uv__stream_open(container->data.stream, pipefds[0], flags);
}
int uv_device_init(uv_loop_t* loop,
uv_device_t* device,
const char*path,
int flags) {
int fd, err;
int stream_flags;
if (flags != O_RDONLY && flags != O_WRONLY && flags != O_RDWR)
return -EINVAL;
uv__stream_init(loop, (uv_stream_t*) device, UV_DEVICE);
fd = open(path, flags);
if (fd < 0)
return -errno;
stream_flags = 0;
if (flags & O_RDONLY)
stream_flags |= UV_STREAM_READABLE;
else if (flags & O_WRONLY)
stream_flags |= UV_STREAM_WRITABLE;
else if (flags & O_RDWR)
stream_flags |= UV_STREAM_READABLE | UV_STREAM_WRITABLE;
err = uv__nonblock(fd, 1);
if (err) {
close(fd);
return err;
}
err = uv__stream_open((uv_stream_t*)device, fd, stream_flags);
if (err) {
close(fd);
return err;
}
return 0;
}
int uv_accept(uv_stream_t* server, uv_stream_t* client) {
uv_stream_t* streamServer;
uv_stream_t* streamClient;
int saved_errno;
int status;
/* TODO document this */
assert(server->loop == client->loop);
saved_errno = errno;
status = -1;
streamServer = (uv_stream_t*)server;
streamClient = (uv_stream_t*)client;
if (streamServer->accepted_fd < 0) {
uv_err_new(server->loop, EAGAIN);
goto out;
}
if (uv__stream_open(streamClient, streamServer->accepted_fd,
UV_READABLE | UV_WRITABLE)) {
/* TODO handle error */
streamServer->accepted_fd = -1;
uv__close(streamServer->accepted_fd);
goto out;
}
ev_io_start(streamServer->loop->ev, &streamServer->read_watcher);
streamServer->accepted_fd = -1;
status = 0;
out:
errno = saved_errno;
return status;
}
int uv_accept(uv_stream_t* server, uv_stream_t* client) {
uv_stream_t* streamServer;
uv_stream_t* streamClient;
int saved_errno;
int status;
/* TODO document this */
assert(server->loop == client->loop);
saved_errno = errno;
status = -1;
streamServer = (uv_stream_t*)server;
streamClient = (uv_stream_t*)client;
if (streamServer->accepted_fd < 0) {
uv__set_sys_error(server->loop, EAGAIN);
goto out;
}
if (uv__stream_open(streamClient, streamServer->accepted_fd,
UV_STREAM_READABLE | UV_STREAM_WRITABLE)) {
/* TODO handle error */
close(streamServer->accepted_fd);
streamServer->accepted_fd = -1;
goto out;
}
uv__io_start(streamServer->loop, &streamServer->io_watcher, UV__POLLIN);
streamServer->accepted_fd = -1;
status = 0;
out:
errno = saved_errno;
return status;
}
static int new_socket(uv_tcp_t* handle, int domain, unsigned long flags) {
struct sockaddr_storage saddr;
socklen_t slen;
int sockfd;
int err;
err = uv__socket(domain, SOCK_STREAM, 0);
if (err < 0)
return err;
sockfd = err;
err = uv__stream_open((uv_stream_t*) handle, sockfd, flags);
if (err) {
uv__close(sockfd);
return err;
}
if (flags & UV_HANDLE_BOUND) {
/* Bind this new socket to an arbitrary port */
slen = sizeof(saddr);
memset(&saddr, 0, sizeof(saddr));
err = getsockname(uv__stream_fd(handle), (struct sockaddr*) &saddr, &slen);
if (err) {
uv__close(sockfd);
return err;
}
err = bind(uv__stream_fd(handle), (struct sockaddr*) &saddr, slen);
if (err) {
uv__close(sockfd);
return err;
}
}
return 0;
}
int uv_tty_init(uv_loop_t* loop, uv_tty_t* tty, int fd, int readable) {
int flags;
int newfd;
int r;
flags = 0;
newfd = -1;
uv__stream_init(loop, (uv_stream_t*) tty, UV_TTY);
/* Reopen the file descriptor when it refers to a tty. This lets us put the
* tty in non-blocking mode without affecting other processes that share it
* with us.
*
* Example: `node | cat` - if we put our fd 0 in non-blocking mode, it also
* affects fd 1 of `cat` because both file descriptors refer to the same
* struct file in the kernel. When we reopen our fd 0, it points to a
* different struct file, hence changing its properties doesn't affect
* other processes.
*/
if (isatty(fd)) {
r = uv__open_cloexec("/dev/tty", O_RDWR);
if (r < 0) {
/* fallback to using blocking writes */
if (!readable)
flags |= UV_STREAM_BLOCKING;
goto skip;
}
newfd = r;
r = uv__dup2_cloexec(newfd, fd);
if (r < 0 && r != -EINVAL) {
/* EINVAL means newfd == fd which could conceivably happen if another
* thread called close(fd) between our calls to isatty() and open().
* That's a rather unlikely event but let's handle it anyway.
*/
uv__close(newfd);
return r;
}
fd = newfd;
}
skip:
#if defined(__APPLE__)
r = uv__stream_try_select((uv_stream_t*) tty, &fd);
if (r) {
if (newfd != -1)
uv__close(newfd);
return r;
}
#endif
if (readable)
flags |= UV_STREAM_READABLE;
else
flags |= UV_STREAM_WRITABLE;
if (!(flags & UV_STREAM_BLOCKING))
uv__nonblock(fd, 1);
uv__stream_open((uv_stream_t*) tty, fd, flags);
tty->mode = UV_TTY_MODE_NORMAL;
return 0;
}
void uv_pipe_connect(uv_connect_t* req,
uv_pipe_t* handle,
const char* name,
uv_connect_cb cb) {
struct sockaddr_un saddr;
int new_sock;
int err;
int r;
size_t name_len;
name_len = strlen(name);
if (name_len > sizeof(saddr.sun_path) - 1) {
err = -ENAMETOOLONG;
goto out;
}
new_sock = (uv__stream_fd(handle) == -1);
if (new_sock) {
err = uv__socket(AF_UNIX, SOCK_STREAM, 0);
if (err < 0)
goto out;
handle->io_watcher.fd = err;
}
memset(&saddr, 0, sizeof saddr);
memcpy(saddr.sun_path, name, name_len);
saddr.sun_family = AF_UNIX;
do {
r = connect(uv__stream_fd(handle),
(struct sockaddr*)&saddr, sizeof saddr);
}
while (r == -1 && errno == EINTR);
if (r == -1 && errno != EINPROGRESS) {
err = -errno;
#if defined(__CYGWIN__) || defined(__MSYS__)
/* EBADF is supposed to mean that the socket fd is bad, but
Cygwin reports EBADF instead of ENOTSOCK when the file is
not a socket. We do not expect to see a bad fd here
(e.g. due to new_sock), so translate the error. */
if (err == -EBADF)
err = -ENOTSOCK;
#endif
goto out;
}
err = 0;
if (new_sock) {
err = uv__stream_open((uv_stream_t*)handle,
uv__stream_fd(handle),
UV_STREAM_READABLE | UV_STREAM_WRITABLE);
}
if (err == 0)
uv__io_start(handle->loop, &handle->io_watcher, POLLIN | POLLOUT);
out:
handle->delayed_error = err;
handle->connect_req = req;
uv__req_init(handle->loop, req, UV_CONNECT);
req->handle = (uv_stream_t*)handle;
req->cb = cb;
QUEUE_INIT(&req->queue);
/* Force callback to run on next tick in case of error. */
if (err)
uv__io_feed(handle->loop, &handle->io_watcher);
}
void uv_pipe_open(uv_pipe_t* handle, uv_file fd) {
uv__stream_open((uv_stream_t*)handle,
fd,
UV_STREAM_READABLE | UV_STREAM_WRITABLE);
}
int uv_pipe_connect(uv_connect_t* req,
uv_pipe_t* handle,
const char* name,
uv_connect_cb cb) {
struct sockaddr_un sun;
int saved_errno;
int sockfd;
int status;
int r;
saved_errno = errno;
sockfd = -1;
status = -1;
if ((sockfd = uv__socket(AF_UNIX, SOCK_STREAM, 0)) == -1) {
uv_err_new(handle->loop, errno);
goto out;
}
memset(&sun, 0, sizeof sun);
uv__strlcpy(sun.sun_path, name, sizeof(sun.sun_path));
sun.sun_family = AF_UNIX;
/* We don't check for EINPROGRESS. Think about it: the socket
* is either there or not.
*/
do {
r = connect(sockfd, (struct sockaddr*)&sun, sizeof sun);
}
while (r == -1 && errno == EINTR);
if (r == -1) {
uv_err_new(handle->loop, errno);
uv__close(sockfd);
goto out;
}
uv__stream_open((uv_stream_t*)handle, sockfd, UV_READABLE | UV_WRITABLE);
ev_io_start(handle->loop->ev, &handle->read_watcher);
ev_io_start(handle->loop->ev, &handle->write_watcher);
status = 0;
out:
handle->delayed_error = status; /* Passed to callback. */
handle->connect_req = req;
req->handle = (uv_stream_t*)handle;
req->type = UV_CONNECT;
req->cb = cb;
ngx_queue_init(&req->queue);
/* Run callback on next tick. */
ev_feed_event(handle->loop->ev, &handle->read_watcher, EV_CUSTOM);
assert(ev_is_pending(&handle->read_watcher));
/* Mimic the Windows pipe implementation, always
* return 0 and let the callback handle errors.
*/
errno = saved_errno;
return 0;
}
int uv_tcp_open(uv_tcp_t* handle, uv_os_sock_t sock) {
return uv__stream_open((uv_stream_t*)handle,
sock,
UV_STREAM_READABLE | UV_STREAM_WRITABLE);
}
/* creates and starts a thread and associated watcher */
int uv_thread_create(uv_loop_t *loop, uv_thread_t *thread, uv_process_options_t options) {
/* initialise the thread handle */
uv__handle_init(loop, (uv_handle_t*)thread, UV_THREAD);
loop->counters.thread_init++;
thread->exit_cb = options.exit_cb;
/* initialise a watcher for this thread */
ev_async_init((ev_async *)&thread->thread_watcher, uv__thread_exit);
ev_async_start(loop->ev, (ev_async *)&thread->thread_watcher);
thread->thread_watcher.data = thread;
/* initialise the shared handle */
uv_thread_shared_t *hnd = (uv_thread_shared_t *)calloc(sizeof(uv_thread_shared_t), 1);
if(!hnd)
goto error;
thread->thread_shared = hnd;
pthread_mutex_init(&hnd->mtx, NULL);
pthread_cond_init(&hnd->cond, NULL);
hnd->thread_handle = thread;
hnd->options = &options;
hnd->thread_arg = options.thread_arg;
hnd->stdin_fd = hnd->stdout_fd = hnd->stderr_fd = -1;
/* FIXME: take ownership of args, but better way sought */
hnd->args = options.args;
hnd->env = options.env;
options.args = 0;
options.env = 0;
/* set up pipes to caller where requested */
int r = 0, flags;
int stdin_pipe[2] = { -1, -1 };
int stdout_pipe[2] = { -1, -1 };
int stderr_pipe[2] = { -1, -1 };
if(options.stdin_stream) {
r = uv__process_init_pipe(options.stdin_stream, stdin_pipe, 0);
if(r)
goto error;
if(stdin_pipe[0] >= 0) {
hnd->stdin_fd = stdin_pipe[0];
uv__nonblock(stdin_pipe[1], 1);
flags = UV_WRITABLE | (options.stdin_stream->ipc ? UV_READABLE : 0);
uv__stream_open((uv_stream_t*)options.stdin_stream, stdin_pipe[1],
flags);
}
}
if(options.stdout_stream) {
r = uv__process_init_pipe(options.stdout_stream, stdout_pipe, 0);
if(r)
goto error;
if(stdout_pipe[1] >= 0) {
hnd->stdout_fd = stdout_pipe[1];
uv__nonblock(stdout_pipe[0], 1);
flags = UV_READABLE | (options.stdout_stream->ipc ? UV_WRITABLE : 0);
uv__stream_open((uv_stream_t*)options.stdout_stream, stdout_pipe[0],
flags);
}
}
if(options.stderr_stream) {
r = uv__process_init_pipe(options.stderr_stream, stderr_pipe, 0);
if(r)
goto error;
if(stderr_pipe[1] >= 0) {
hnd->stderr_fd = stderr_pipe[1];
uv__nonblock(stderr_pipe[0], 1);
flags = UV_READABLE | (options.stderr_stream->ipc ? UV_WRITABLE : 0);
uv__stream_open((uv_stream_t*)options.stderr_stream, stderr_pipe[0],
flags);
}
}
/* synchronously create the thread */
pthread_mutex_lock(&hnd->mtx);
pthread_create(&hnd->thread_id, 0, uv__thread_run, hnd);
pthread_cond_wait(&hnd->cond, &hnd->mtx);
pthread_mutex_unlock(&hnd->mtx);
return 0;
error:
uv__set_sys_error(loop, errno);
uv__close(stdin_pipe[0]);
uv__close(stdin_pipe[1]);
uv__close(stdout_pipe[0]);
uv__close(stdout_pipe[1]);
uv__close(stderr_pipe[0]);
uv__close(stderr_pipe[1]);
return -1;
}
int uv_spawn(uv_loop_t* loop, uv_process_t* process,
uv_process_options_t options) {
/*
* Save environ in the case that we get it clobbered
* by the child process.
*/
char** save_our_env = environ;
int stdin_pipe[2] = { -1, -1 };
int stdout_pipe[2] = { -1, -1 };
int stderr_pipe[2] = { -1, -1 };
#if SPAWN_WAIT_EXEC
int signal_pipe[2] = { -1, -1 };
struct pollfd pfd;
#endif
int status;
pid_t pid;
int flags;
uv__handle_init(loop, (uv_handle_t*)process, UV_PROCESS);
loop->counters.process_init++;
process->exit_cb = options.exit_cb;
if (options.stdin_stream &&
uv__process_init_pipe(options.stdin_stream, stdin_pipe, 0)) {
goto error;
}
if (options.stdout_stream &&
uv__process_init_pipe(options.stdout_stream, stdout_pipe, 0)) {
goto error;
}
if (options.stderr_stream &&
uv__process_init_pipe(options.stderr_stream, stderr_pipe, 0)) {
goto error;
}
/* This pipe is used by the parent to wait until
* the child has called `execve()`. We need this
* to avoid the following race condition:
*
* if ((pid = fork()) > 0) {
* kill(pid, SIGTERM);
* }
* else if (pid == 0) {
* execve("/bin/cat", argp, envp);
* }
*
* The parent sends a signal immediately after forking.
* Since the child may not have called `execve()` yet,
* there is no telling what process receives the signal,
* our fork or /bin/cat.
*
* To avoid ambiguity, we create a pipe with both ends
* marked close-on-exec. Then, after the call to `fork()`,
* the parent polls the read end until it sees POLLHUP.
*/
#if SPAWN_WAIT_EXEC
if (uv__make_pipe(signal_pipe, UV__F_NONBLOCK))
goto error;
#endif
pid = fork();
if (pid == -1) {
#if SPAWN_WAIT_EXEC
uv__close(signal_pipe[0]);
uv__close(signal_pipe[1]);
#endif
environ = save_our_env;
goto error;
}
if (pid == 0) {
if (stdin_pipe[0] >= 0) {
uv__close(stdin_pipe[1]);
dup2(stdin_pipe[0], STDIN_FILENO);
} else {
/* Reset flags that might be set by Node */
uv__cloexec(STDIN_FILENO, 0);
uv__nonblock(STDIN_FILENO, 0);
}
if (stdout_pipe[1] >= 0) {
uv__close(stdout_pipe[0]);
dup2(stdout_pipe[1], STDOUT_FILENO);
} else {
/* Reset flags that might be set by Node */
uv__cloexec(STDOUT_FILENO, 0);
uv__nonblock(STDOUT_FILENO, 0);
}
if (stderr_pipe[1] >= 0) {
uv__close(stderr_pipe[0]);
dup2(stderr_pipe[1], STDERR_FILENO);
} else {
/* Reset flags that might be set by Node */
uv__cloexec(STDERR_FILENO, 0);
uv__nonblock(STDERR_FILENO, 0);
}
if (options.cwd && chdir(options.cwd)) {
perror("chdir()");
_exit(127);
}
environ = options.env;
execvp(options.file, options.args);
perror("execvp()");
_exit(127);
/* Execution never reaches here. */
}
/* Parent. */
/* Restore environment. */
environ = save_our_env;
#if SPAWN_WAIT_EXEC
/* POLLHUP signals child has exited or execve()'d. */
uv__close(signal_pipe[1]);
do {
pfd.fd = signal_pipe[0];
pfd.events = POLLIN|POLLHUP;
pfd.revents = 0;
errno = 0, status = poll(&pfd, 1, -1);
}
while (status == -1 && (errno == EINTR || errno == ENOMEM));
assert((status == 1) && "poll() on pipe read end failed");
uv__close(signal_pipe[0]);
#endif
process->pid = pid;
ev_child_init(&process->child_watcher, uv__chld, pid, 0);
ev_child_start(process->loop->ev, &process->child_watcher);
process->child_watcher.data = process;
if (stdin_pipe[1] >= 0) {
assert(options.stdin_stream);
assert(stdin_pipe[0] >= 0);
uv__close(stdin_pipe[0]);
uv__nonblock(stdin_pipe[1], 1);
flags = UV_WRITABLE | (options.stdin_stream->ipc ? UV_READABLE : 0);
uv__stream_open((uv_stream_t*)options.stdin_stream, stdin_pipe[1],
flags);
}
if (stdout_pipe[0] >= 0) {
assert(options.stdout_stream);
assert(stdout_pipe[1] >= 0);
uv__close(stdout_pipe[1]);
uv__nonblock(stdout_pipe[0], 1);
flags = UV_READABLE | (options.stdout_stream->ipc ? UV_WRITABLE : 0);
uv__stream_open((uv_stream_t*)options.stdout_stream, stdout_pipe[0],
flags);
}
if (stderr_pipe[0] >= 0) {
assert(options.stderr_stream);
assert(stderr_pipe[1] >= 0);
uv__close(stderr_pipe[1]);
uv__nonblock(stderr_pipe[0], 1);
flags = UV_READABLE | (options.stderr_stream->ipc ? UV_WRITABLE : 0);
uv__stream_open((uv_stream_t*)options.stderr_stream, stderr_pipe[0],
flags);
}
return 0;
error:
uv__set_sys_error(process->loop, errno);
uv__close(stdin_pipe[0]);
uv__close(stdin_pipe[1]);
uv__close(stdout_pipe[0]);
uv__close(stdout_pipe[1]);
uv__close(stderr_pipe[0]);
uv__close(stderr_pipe[1]);
return -1;
}
