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Pass terminal data on socket on Cygwin platforms

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On Cygwin and MSYS2 use a controlling pty for the server client handler
instead of passing a file descriptor over the socket which is not
possible on Cygwin platforms.

Attach an event to STDIN on the client, passing data from it to the
server and attach an event to the pty out_fd on the server client
handler and pass data from it to the client.

Signed-off-by: Rafael Kitover <rkitover@gmail.com>
This commit is contained in:
Rafael Kitover
2024-07-25 21:55:40 +00:00
parent 8d6eb4be40
commit 80e6621298
6 changed files with 78 additions and 2 deletions
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39
tty.c
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@@ -250,6 +250,11 @@ tty_write_callback(__unused int fd, __unused short events, void *data)
struct client *c = tty->client;
size_t size = EVBUFFER_LENGTH(tty->out);
int nwrite;
#ifdef TTY_OVER_SOCKET
enum msgtype msg = MSG_TTY_READ;
proc_send(c->peer, msg, -1, EVBUFFER_DATA(tty->out), size);
#endif
nwrite = evbuffer_write(tty->out, c->fd);
if (nwrite == -1)
@@ -304,6 +309,40 @@ tty_open(struct tty *tty, char **cause)
return (0);
}
#ifdef TTY_OVER_SOCKET
static struct tmuxpeer *client_peer;
static void
tty_stdin_socket_callback(int fd, __unused short events, void *data)
{
struct tty *tty = data;
int nread;
enum msgtype msg = MSG_TTY_WRITE;
nread = evbuffer_read(tty->in, fd, -1);
if (nread == 0 || nread == -1) {
event_del(&tty->event_in);
return;
}
proc_send(client_peer, msg, -1, EVBUFFER_DATA(tty->in), nread);
}
int
tty_attach_stdin_to_socket(struct tty *tty, struct tmuxpeer *peer)
{
client_peer = peer;
event_set(&tty->event_in, STDIN_FILENO, EV_PERSIST|EV_READ,
tty_stdin_socket_callback, tty);
tty->in = evbuffer_new();
if (tty->in == NULL)
fatal("out of memory");
return (0);
}
#endif
static void
tty_start_timer_callback(__unused int fd, __unused short events, void *data)
{