Re: [Qemu-devel] [PATCH v2 27/35] vnc: Clean up error reporting in vnc_init_func()

[Fei Li <fli@suse.com>]

On 10/15/2018 07:53 PM, Markus Armbruster wrote:
> Calling error_report() in a function that takes an Error ** argument
> is suspicious.  vnc_init_func() does that, and then fails without
> setting an error.  Its caller main(), via qemu_opts_foreach(), is fine
> with it, but clean it up anyway.
>
> Cc: Gerd Hoffmann <kraxel@redhat.com>
> Signed-off-by: Markus Armbruster <armbru@redhat.com>
> ---
>   ui/vnc.c | 9 +++++----
>   vl.c     | 2 +-
>   2 files changed, 6 insertions(+), 5 deletions(-)
>
> diff --git a/ui/vnc.c b/ui/vnc.c
> index 98e3d3b1d8..fcd2744d52 100644
> --- a/ui/vnc.c
> +++ b/ui/vnc.c
> @@ -4082,13 +4082,14 @@ int vnc_init_func(void *opaque, QemuOpts *opts, Error **errp)
>       assert(id);
>       vnc_display_init(id, &local_err);
>       if (local_err) {
> -        error_report_err(local_err);
> -        exit(1);
> +        error_propagate(errp, local_err);
Shall we use error_propagate(errp, local_err, ("Failed to init VNC 
server: ");
like vnc_display_open does?
If yes, I guess this error message should be added from last patch [26/35].
If not, please omit. :)

Have a nice day
Fei
> +        return -1;
>       }
>       vnc_display_open(id, &local_err);
>       if (local_err != NULL) {
> -        error_reportf_err(local_err, "Failed to start VNC server: ");
> -        exit(1);
> +        error_propagate_prepend(errp, local_err,
> +                                "Failed to start VNC server: ");
> +        return -1;
>       }
>       return 0;
>   }
> diff --git a/vl.c b/vl.c
> index c053117028..8e0006d49c 100644
> --- a/vl.c
> +++ b/vl.c
> @@ -4526,7 +4526,7 @@ int main(int argc, char **argv, char **envp)
>       /* init remote displays */
>   #ifdef CONFIG_VNC
>       qemu_opts_foreach(qemu_find_opts("vnc"),
> -                      vnc_init_func, NULL, NULL);
> +                      vnc_init_func, NULL, &error_fatal);
>   #endif
>   
>       if (using_spice) {