aboutsummaryrefslogtreecommitdiff
path: root/chardev/char.c
diff options
context:
space:
mode:
Diffstat (limited to 'chardev/char.c')
-rw-r--r--chardev/char.c258
1 files changed, 0 insertions, 258 deletions
diff --git a/chardev/char.c b/chardev/char.c
index b542c25cec..6d4cb7c71e 100644
--- a/chardev/char.c
+++ b/chardev/char.c
@@ -661,261 +661,6 @@ void qemu_chr_fe_take_focus(CharBackend *b)
|| defined(__GLIBC__)
#define HAVE_CHARDEV_SERIAL 1
-#define HAVE_CHARDEV_PTY 1
-
-typedef struct {
- Chardev parent;
- QIOChannel *ioc;
- int read_bytes;
-
- /* Protected by the Chardev chr_write_lock. */
- int connected;
- guint timer_tag;
- guint open_tag;
-} PtyChardev;
-
-#define PTY_CHARDEV(obj) OBJECT_CHECK(PtyChardev, (obj), TYPE_CHARDEV_PTY)
-
-static void pty_chr_update_read_handler_locked(Chardev *chr);
-static void pty_chr_state(Chardev *chr, int connected);
-
-static gboolean pty_chr_timer(gpointer opaque)
-{
- struct Chardev *chr = CHARDEV(opaque);
- PtyChardev *s = PTY_CHARDEV(opaque);
-
- qemu_mutex_lock(&chr->chr_write_lock);
- s->timer_tag = 0;
- s->open_tag = 0;
- if (!s->connected) {
- /* Next poll ... */
- pty_chr_update_read_handler_locked(chr);
- }
- qemu_mutex_unlock(&chr->chr_write_lock);
- return FALSE;
-}
-
-/* Called with chr_write_lock held. */
-static void pty_chr_rearm_timer(Chardev *chr, int ms)
-{
- PtyChardev *s = PTY_CHARDEV(chr);
- char *name;
-
- if (s->timer_tag) {
- g_source_remove(s->timer_tag);
- s->timer_tag = 0;
- }
-
- if (ms == 1000) {
- name = g_strdup_printf("pty-timer-secs-%s", chr->label);
- s->timer_tag = g_timeout_add_seconds(1, pty_chr_timer, chr);
- } else {
- name = g_strdup_printf("pty-timer-ms-%s", chr->label);
- s->timer_tag = g_timeout_add(ms, pty_chr_timer, chr);
- }
- g_source_set_name_by_id(s->timer_tag, name);
- g_free(name);
-}
-
-/* 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);
- }
-}
-
-static void pty_chr_update_read_handler(Chardev *chr,
- GMainContext *context)
-{
- qemu_mutex_lock(&chr->chr_write_lock);
- pty_chr_update_read_handler_locked(chr);
- qemu_mutex_unlock(&chr->chr_write_lock);
-}
-
-/* Called with chr_write_lock held. */
-static int char_pty_chr_write(Chardev *chr, const uint8_t *buf, int len)
-{
- PtyChardev *s = PTY_CHARDEV(chr);
-
- if (!s->connected) {
- /* guest sends data, check for (re-)connect */
- pty_chr_update_read_handler_locked(chr);
- if (!s->connected) {
- return 0;
- }
- }
- return io_channel_send(s->ioc, buf, len);
-}
-
-static GSource *pty_chr_add_watch(Chardev *chr, GIOCondition cond)
-{
- PtyChardev *s = PTY_CHARDEV(chr);
- if (!s->connected) {
- return NULL;
- }
- return qio_channel_create_watch(s->ioc, cond);
-}
-
-static int pty_chr_read_poll(void *opaque)
-{
- Chardev *chr = CHARDEV(opaque);
- PtyChardev *s = PTY_CHARDEV(opaque);
-
- s->read_bytes = qemu_chr_be_can_write(chr);
- return s->read_bytes;
-}
-
-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 gboolean qemu_chr_be_generic_open_func(gpointer opaque)
-{
- Chardev *chr = CHARDEV(opaque);
- PtyChardev *s = PTY_CHARDEV(opaque);
-
- s->open_tag = 0;
- qemu_chr_be_generic_open(chr);
- return FALSE;
-}
-
-/* Called with chr_write_lock held. */
-static void pty_chr_state(Chardev *chr, int connected)
-{
- PtyChardev *s = PTY_CHARDEV(chr);
-
- if (!connected) {
- if (s->open_tag) {
- g_source_remove(s->open_tag);
- s->open_tag = 0;
- }
- remove_fd_in_watch(chr);
- s->connected = 0;
- /* (re-)connect poll interval for idle guests: once per second.
- * We check more frequently in case the guests sends data to
- * the virtual device linked to our pty. */
- pty_chr_rearm_timer(chr, 1000);
- } else {
- if (s->timer_tag) {
- g_source_remove(s->timer_tag);
- s->timer_tag = 0;
- }
- if (!s->connected) {
- g_assert(s->open_tag == 0);
- s->connected = 1;
- s->open_tag = g_idle_add(qemu_chr_be_generic_open_func, chr);
- }
- if (!chr->fd_in_tag) {
- chr->fd_in_tag = io_add_watch_poll(chr, s->ioc,
- pty_chr_read_poll,
- pty_chr_read,
- chr, NULL);
- }
- }
-}
-
-static void char_pty_finalize(Object *obj)
-{
- Chardev *chr = CHARDEV(obj);
- PtyChardev *s = PTY_CHARDEV(obj);
-
- qemu_mutex_lock(&chr->chr_write_lock);
- pty_chr_state(chr, 0);
- object_unref(OBJECT(s->ioc));
- if (s->timer_tag) {
- g_source_remove(s->timer_tag);
- s->timer_tag = 0;
- }
- qemu_mutex_unlock(&chr->chr_write_lock);
- qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
-}
-
-static void char_pty_open(Chardev *chr,
- ChardevBackend *backend,
- bool *be_opened,
- Error **errp)
-{
- PtyChardev *s;
- int master_fd, slave_fd;
- char pty_name[PATH_MAX];
- char *name;
-
- master_fd = qemu_openpty_raw(&slave_fd, pty_name);
- if (master_fd < 0) {
- error_setg_errno(errp, errno, "Failed to create PTY");
- return;
- }
-
- close(slave_fd);
- qemu_set_nonblock(master_fd);
-
- chr->filename = g_strdup_printf("pty:%s", pty_name);
- error_report("char device redirected to %s (label %s)",
- pty_name, chr->label);
-
- s = PTY_CHARDEV(chr);
- s->ioc = QIO_CHANNEL(qio_channel_file_new_fd(master_fd));
- name = g_strdup_printf("chardev-pty-%s", chr->label);
- qio_channel_set_name(QIO_CHANNEL(s->ioc), name);
- g_free(name);
- s->timer_tag = 0;
- *be_opened = false;
-}
-
-static void char_pty_class_init(ObjectClass *oc, void *data)
-{
- ChardevClass *cc = CHARDEV_CLASS(oc);
-
- cc->open = char_pty_open;
- cc->chr_write = char_pty_chr_write;
- cc->chr_update_read_handler = pty_chr_update_read_handler;
- cc->chr_add_watch = pty_chr_add_watch;
-}
-
-static const TypeInfo char_pty_type_info = {
- .name = TYPE_CHARDEV_PTY,
- .parent = TYPE_CHARDEV,
- .instance_size = sizeof(PtyChardev),
- .instance_finalize = char_pty_finalize,
- .class_init = char_pty_class_init,
-};
static void tty_serial_init(int fd, int speed,
int parity, int data_bits, int stop_bits)
@@ -2175,9 +1920,6 @@ static void register_types(void)
#ifdef HAVE_CHARDEV_PARPORT
type_register_static(&char_parallel_type_info);
#endif
-#ifdef HAVE_CHARDEV_PTY
- type_register_static(&char_pty_type_info);
-#endif
/* this must be done after machine init, since we register FEs with muxes
* as part of realize functions like serial_isa_realizefn when -nographic
generated by cgit v1.2.3 (git 2.26.2) at 2024-12-12 12:20:32 +0000