| From: | Alvaro Herrera <alvherre(at)dcc(dot)uchile(dot)cl> |
|---|---|
| To: | Andreas Pflug <pgadmin(at)pse-consulting(dot)de> |
| Cc: | Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: SysLogger subprocess |
| Date: | 2004-07-15 19:36:04 |
| Message-ID: | 20040715193604.GA3393@dcc.uchile.cl |
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| Lists: | pgsql-hackers |
On Thu, Jul 15, 2004 at 09:00:50PM +0200, Andreas Pflug wrote:
> While looking at pgstat.c to see how to peek for pipe data, I found
> readpipe=pgStatPipe[0];
> select(readPipe+1, ..);
>
> which is probably usually the same as select(pgStatPipe[1], ..) This fd
> arithmetics seem a bit dubious to me.
No, it's not pgStatPipe[1], it's select(2)'s first argument; max fd in
the sets plus one. Probably your code works because
pgStatPipe[1] == pgStatPipe[0] + 1.
--
Alvaro Herrera (<alvherre[a]dcc.uchile.cl>)
"Por suerte hoy explotó el califont porque si no me habría muerto
de aburrido" (Papelucho)
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