Re: [Qemu-devel] [PATCH] vnc: generalize "VNC server running on ..." message

["Daniel P. Berrange" <berrange@redhat.com>]

On Mon, Jun 06, 2016 at 02:01:10PM +0200, Paolo Bonzini wrote:
> The message is useful whenever the user specifies "-vnc to=XX".
> Move it to ui/vnc.c.
> 
> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
> ---
>  include/ui/console.h |  7 -------
>  ui/vnc.c             | 16 ++++++++--------
>  vl.c                 |  7 -------
>  3 files changed, 8 insertions(+), 22 deletions(-)
> 
> diff --git a/include/ui/console.h b/include/ui/console.h
> index 52a5f65..7c1fdba 100644
> --- a/include/ui/console.h
> +++ b/include/ui/console.h
> @@ -460,7 +460,6 @@ void vnc_display_add_client(const char *id, int csock, bool skipauth);
>  #ifdef CONFIG_VNC
>  int vnc_display_password(const char *id, const char *password);
>  int vnc_display_pw_expire(const char *id, time_t expires);
> -char *vnc_display_local_addr(const char *id);
>  QemuOpts *vnc_parse(const char *str, Error **errp);
>  int vnc_init_func(void *opaque, QemuOpts *opts, Error **errp);
>  #else
> @@ -482,12 +481,6 @@ static inline int vnc_init_func(void *opaque, QemuOpts *opts, Error **errp)
>      error_setg(errp, "VNC support is disabled");
>      return -1;
>  }
> -static inline char *vnc_display_local_addr(const char *id)
> -{
> -    /* This must never be called if CONFIG_VNC is disabled */
> -    error_report("VNC support is disabled");
> -    abort();
> -}
>  #endif
>  
>  /* curses.c */
> diff --git a/ui/vnc.c b/ui/vnc.c
> index c862fdc..a2bf535 100644
> --- a/ui/vnc.c
> +++ b/ui/vnc.c
> @@ -3207,15 +3207,11 @@ int vnc_display_pw_expire(const char *id, time_t expires)
>      return 0;
>  }
>  
> -char *vnc_display_local_addr(const char *id)
> +static void vnc_display_print_local_addr(VncDisplay *vs)
>  {
> -    VncDisplay *vs = vnc_display_find(id);
>      SocketAddress *addr;
> -    char *ret;
>      Error *err = NULL;
>  
> -    assert(vs);
> -
>      addr = qio_channel_socket_get_local_address(vs->lsock, &err);
>      if (!addr) {
>          return NULL;
> @@ -3225,11 +3221,9 @@ char *vnc_display_local_addr(const char *id)
>          qapi_free_SocketAddress(addr);
>          return NULL;
>      }
> -    ret = g_strdup_printf("%s;%s", addr->u.inet.data->host,
> +    printf("VNC server running on '%s:%s;\n", addr->u.inet.data->host,
>                            addr->u.inet.data->port);
>      qapi_free_SocketAddress(addr);
> -
> -    return ret;
>  }
>  
>  static QemuOptsList qemu_vnc_opts = {
> @@ -3515,6 +3509,7 @@ void vnc_display_open(const char *id, Error **errp)
>      const char *vnc;
>      char *h;
>      const char *credid;
> +    int show_vnc_port = 0;
>      bool sasl = false;
>  #ifdef CONFIG_VNC_SASL
>      int saslErr;
> @@ -3594,6 +3589,7 @@ void vnc_display_open(const char *id, Error **errp)
>              if (to) {
>                  inet->has_to = true;
>                  inet->to = to + 5900;
> +                show_vnc_port = 1;
>              }
>              inet->ipv4 = ipv4;
>              inet->has_ipv4 = has_ipv4;
> @@ -3838,6 +3834,10 @@ void vnc_display_open(const char *id, Error **errp)
>          }
>      }
>  
> +    if (show_vnc_port) {
> +        vnc_display_print_local_addr(vs);
> +    }
> +
>      qapi_free_SocketAddress(saddr);
>      qapi_free_SocketAddress(wsaddr);
>      return;

By calling this from vnc_display_open, you'll cause it to
print to stdout, even when using QMP, because qmp_change_vnc_listen
calls vnc_display_open.

Regards,
Daniel
-- 
|: http://berrange.com      -o-    http://www.flickr.com/photos/dberrange/ :|
|: http://libvirt.org              -o-             http://virt-manager.org :|
|: http://autobuild.org       -o-         http://search.cpan.org/~danberr/ :|
|: http://entangle-photo.org       -o-       http://live.gnome.org/gtk-vnc :|