From: Jacob Moody <moody@mail.posixcafe.org>
To: 9front@9front.org
Subject: Re: [9front] question about httpd
Date: Tue, 2 Aug 2022 10:56:40 -0600 [thread overview]
Message-ID: <b554858a-1dec-19c3-652f-820c53211c63@posixcafe.org> (raw)
In-Reply-To: <1363970938.169268.1659459065934@office.mailbox.org>
On 8/2/22 10:51, sahu@mailbox.org wrote:
> Hello,
>
> I have looked at the code, and have a question about the redirectinit() function in /sys/src/cmd/ip/httpd/redirect.c:
>
> void
> redirectinit(void)
> {
> static Biobuf *b = nil;
> static Qid qid;
> char *file, *line, *s, *host, *field[3];
> static char pfx[] = "http://";
>
> file = "/sys/lib/httpd.rewrite";
> if(b != nil){
> if( (Bfildes(b), &qid) == 0)
> return;
> Bterm(b);
> }
> ...
> }
>
> In which cases could b be nil? And since it appears more often in the function, what do "B" (Biobuf, Bfildes, Bterm, ...) and "Q" (Qid) stand for?
>
> Many thanks in advance and best regards,
> sahu
Note that 'b' is declared as static, meaning it will retain it's values between calls.
So b will be nil on only the first call to this function, subsequent calls will have
a valid pointer.
---
Moody
next prev parent reply other threads:[~2022-08-02 16:58 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-08-02 16:51 sahu
2022-08-02 16:56 ` Jacob Moody [this message]
2022-08-02 17:12 ` ori
2022-08-02 17:13 ` Kurt H Maier
2022-08-02 17:45 ` Jacob Moody
2022-08-02 18:41 ` ori
2022-08-02 19:34 ` sirjofri
2022-08-02 19:44 ` Jacob Moody
2022-08-02 19:53 ` sahu
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