/* QEMU's console emulates a 16550A serial port. The real 16550A
* device has a small FIFO buffer (16 bytes) which means here we see
* lots of small reads of 1-16 bytes in length, usually single
- * bytes.
+ * bytes. Sleeping here for a very brief period groups reads
+ * together (so we usually get a few lines of output at once) and
+ * improves overall throughput, as well as making the event
+ * interface a bit more sane for callers. With a virtio-serial
+ * based console (not yet implemented) we may be able to remove
+ * this. XXX
*/
+ usleep (1000);
+
n = read (fd, buf, sizeof buf);
if (n == 0) {
/* Hopefully this indicates the qemu child process has died. */
/* It's an actual log message, send it upwards if anyone is listening. */
guestfs___call_callbacks_message (g, GUESTFS_EVENT_APPLIANCE, buf, n);
+ /* This is a gross hack. See the comment above
+ * guestfs___launch_send_progress.
+ */
+ if (g->state == LAUNCHING) {
+ const char *sentinel;
+ size_t len;
+
+ sentinel = "Linux version"; /* kernel up */
+ len = strlen (sentinel);
+ if (memmem (buf, n, sentinel, len) != NULL)
+ guestfs___launch_send_progress (g, 6);
+
+ sentinel = "Starting /init script"; /* /init running */
+ len = strlen (sentinel);
+ if (memmem (buf, n, sentinel, len) != NULL)
+ guestfs___launch_send_progress (g, 9);
+ }
+
return 0;
}