Re: [bug fix] pg_ctl always uses the same event source

From: "Magnus Hagander" <magnus(at)hagander(dot)net>
> There's also the change to throw an error if the source is already
> registered, which is potentially a bigger problem. Since the default
> will be the same everywhere, do we really want to throw an error when
> you install a second version, now that this is the normal state?
>
> There's also definitely a problem in that that codepath fires up a
> MessageBox, but it's just a function called in a DLL. It might just as
> well be called from a background service or from within an installer
> with no visible desktop, at which point the process will appear to be
> hung... I'm pretty sure you're not allowed to do that.

I got what you mean. I removed changes in pgevent.c except for the default
name. I attached the revised patch.

>>> More importantly, isn't it wrong to claim it will only be used for
>>> register and unregister? If we get an early failure in start, for
>>> example, there are numerous codepaths that will end up calling
>>> write_stderr(), which will use the eventlog when running as a service.
>>> Shouldn't the "-e" parameter be moved under "common options"?
>>
>>
>> Yes, you are right. -e is effective only if pg_ctl is invoked as a
>> Windows
>> service. So it is written at register mode. That is, -e specifies the
>> event source used by the Windows service which is registered by "pg_ctl
>> register".
>
> Oh, right. I see what you mean now. That goes for all parameters
> though, including -D, and we don't specify those as register mode
> only, so I still think it's wrong to place it there. It is now grouped
> with all other parameters that we specifically *don't* write to the
> commandline of the service.

Sorry, but I'm probably not understanding your comment. This may be due to
my English capability. -e is effective only on Windows, so it is placed in
section "Options for Windows". And I could not find a section named "Common
options". -e is currently meangful only with register mode, so it is placed
at register mode in Synopsis section. For example, -D is not attached to
kill mode.

Do you suggest that -e should be attached to all modes in Synopsis section,
or -e should be placed in the section "Options" instead of "Options for
Windows"?

Regards
MauMau