Re: [Qemu-devel] [PATCH 1/6] slirp: Remove default_mon usage

[Cole Robinson <crobinso@redhat.com>]

On 03/12/2014 04:13 AM, Markus Armbruster wrote:
> Cole Robinson <crobinso@redhat.com> writes:
> 
>> These errors don't seem user initiated, so forcibly printing to the
>> monitor doesn't seem right. Just print to stderr.
>>
>> Drop lprint since it's now unused.
>>
>> Cc: Jan Kiszka <jan.kiszka@siemens.com>
>> Signed-off-by: Cole Robinson <crobinso@redhat.com>
>> ---
>> checkpatch flags some pre-existing tab issues, but I didn't retab. Should I?
>>
>>  slirp/misc.c  | 13 ++-----------
>>  slirp/slirp.c |  8 ++++----
>>  slirp/slirp.h |  2 --
>>  3 files changed, 6 insertions(+), 17 deletions(-)
>>
>> diff --git a/slirp/misc.c b/slirp/misc.c
>> index 6c1636f..662fb1d 100644
>> --- a/slirp/misc.c
>> +++ b/slirp/misc.c
>> @@ -136,7 +136,7 @@ fork_exec(struct socket *so, const char *ex, int do_pty)
>>  		if ((s = qemu_socket(AF_INET, SOCK_STREAM, 0)) < 0 ||
>>  		    bind(s, (struct sockaddr *)&addr, addrlen) < 0 ||
>>  		    listen(s, 1) < 0) {
>> -			lprint("Error: inet socket: %s\n", strerror(errno));
>> +			fprintf(stderr, "Error: inet socket: %s\n", strerror(errno));
>>  			closesocket(s);
>>  
>>  			return 0;
> 
> Why not error_report()?
> 
> [...]
> 

AFAICT this is only guest initiated, never from the monitor. error_report
sends output to cur_mon if a monitor command is being processed. If this
message triggers while a different monitor command is being processed, do we
really want this unrelated output to go to the monitor?

(Maybe that can't happen in practice, I don't know enough about qemu's
threading model, but I was being cautious)

- Cole