From: Joel âcheskyâ Salomon <chesky@plan9.jp>
To: 9fans@cse.psu.edu
Subject: Re: [9fans] csipinfo
Date: Wed, 18 Oct 2006 15:38:56 -0400 [thread overview]
Message-ID: <365a3b8e0ce821506adb926ac1001503@plan9.jp> (raw)
In-Reply-To: <08660eafbf4cef501efcf7a33fe5d3d2@vitanuova.com>
> > Thanks, this finally looks like what I need.
>
> it won't work. something like the code i posted is needed.
I’m trying to read the limbo code and translate it to my needs; bear with me as I translate this to c-ish pseudocode:
char*
gethostbyaddr(char *net, char *addr)
{
char buf[1024], *dq[4], s;
int fd, l;
if(net == nil)
net = "/net";
snprint(buf, sizeof buf, "%s/dns", net);
if((fd = open(buf, ORDWR)) < 0)
return nil; // set errstr "gethostbyaddr failed: can't open %s: %r", buf)
dq[0] = strtok(addr, "."); // neglecting error checking
dq[1] = strtok(0, "."); dq[2] = strtok(0, "."); dq[3] = strtok(0, ".");
snprint(buf, sizeof buf, "%s.%s.%s.%s.in-addr.arpa ptr",
dq[3], dq[2], dq[1], dq[0]);
if(write(fd, buf, l) != l)
return nil; // close fd & set errstr
if(read(fd, buf, sizeof buf) < 0)
return nil;
s = strstr(buf, " ptr ");
return(strdup(s+5));
}
Well, it’s less pseudocode than a rough draft. If it passes rog’s sanity check I’ll add better error checking and submit it for inclusion somewhere—someone, somewhere, has got to want this.
--Joel
next prev parent reply other threads:[~2006-10-18 19:38 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <61d9157e8f6994d999d7f257cd2b05b4@coraid.com>
2006-10-18 18:44 ` Joel “chesky” Salomon
2006-10-18 19:14 ` rog
2006-10-18 19:26 ` erik quanstrom
2006-10-18 19:38 ` Joel “chesky” Salomon [this message]
2006-10-18 19:57 ` C H Forsyth
2006-10-18 23:51 ` Charles Forsyth
2006-10-19 8:29 ` Charles Forsyth
2006-10-18 20:17 ` Joel “chesky” Salomon
2006-10-18 21:29 ` geoff
2006-10-18 19:56 ` Charles Forsyth
2006-10-18 19:59 ` erik quanstrom
2006-10-18 20:15 ` rog
2006-10-18 19:30 ` erik quanstrom
2006-10-18 3:10 Joel “chesky” Salomon
2006-10-18 3:36 ` geoff
2006-10-18 5:20 ` Joel “chesky” Salomon
2006-10-18 5:37 ` geoff
2006-10-18 5:53 ` Joel “chesky” Salomon
2006-10-18 12:38 ` Joel “chesky” Salomon
2006-10-18 15:32 ` Russ Cox
2006-10-18 16:43 ` Joel Salomon
2006-10-18 16:59 ` rog
2006-10-18 20:38 ` andrey mirtchovski
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