static gboolean pty_chr_read(QIOChannel *chan, GIOCondition cond, void *opaque)
{
Chardev *chr = CHARDEV(opaque);
PtyChardev *s = PTY_CHARDEV(opaque);
gsize len;
uint8_t buf[CHR_READ_BUF_LEN];
ssize_t ret;
len = sizeof(buf);
if (len > s->read_bytes) {
len = s->read_bytes;
}
if (len == 0) {
return TRUE;
}
ret = qio_channel_read(s->ioc, (char *)buf, len, NULL);
if (ret <= 0) {
pty_chr_state(chr, 0);
return FALSE;
} else {
pty_chr_state(chr, 1);
qemu_chr_be_write(chr, buf, ret);
}
return TRUE;
}
static void char_pty_finalize(Object *obj)
{
Chardev *chr = CHARDEV(obj);
PtyChardev *s = PTY_CHARDEV(obj);
pty_chr_state(chr, 0);
object_unref(OBJECT(s->ioc));
pty_chr_timer_cancel(s);
qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
}
/* Called with chr_write_lock held. */
static void pty_chr_update_read_handler_locked(Chardev *chr)
{
PtyChardev *s = PTY_CHARDEV(chr);
GPollFD pfd;
int rc;
QIOChannelFile *fioc = QIO_CHANNEL_FILE(s->ioc);
pfd.fd = fioc->fd;
pfd.events = G_IO_OUT;
pfd.revents = 0;
do {
rc = g_poll(&pfd, 1, 0);
} while (rc == -1 && errno == EINTR);
assert(rc >= 0);
if (pfd.revents & G_IO_HUP) {
pty_chr_state(chr, 0);
} else {
pty_chr_state(chr, 1);
}
}
