From: Larry McVoy <lm@mcvoy.com>
To: tuhs@minnie.tuhs.org
Subject: [TUHS] Remember the ed thread?
Date: Mon, 29 Mar 2021 07:34:49 -0700 [thread overview]
Message-ID: <20210329143449.GA28080@mcvoy.com> (raw)
I had *.clients.your-server.de crawling mcvoy.com in violation of my
robots.txt. For whatever reason, the tty settings (or something)
made vi not work, I dunno what the deal is, stty -tabs didn't help.
So I had to resort to ed to write and debug the little program below.
It was surprisingly pleasant, it's probably the first time I've used ed
for anything real in at least a decade. My fingers still know it.
+1 for ed. It's how many decades old and still useful?
#!/usr/libexec/bitkeeper/bk tclsh
int
main(void)
{
FILE log = popen("/var/log/apache2/dns.l", "r");
string buf, ip;
string dropped{string};
fconfigure(log, buffering: "line");
while (buf = <log>) {
unless (buf =~ /([^ ]+\.your-server\.de\.) /) continue;
ip = $1;
if (defined(dropped{ip})) continue;
dropped{ip} = "yes";
warn("DROP ${ip}\n");
system("/sbin/iptables -I INPUT -s ${ip} -j DROP");
}
}
next reply other threads:[~2021-03-29 14:35 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-29 14:34 Larry McVoy [this message]
2021-03-29 15:09 ` Anders Damsgaard
2021-03-29 15:26 ` Brantley Coile
2021-03-29 15:36 ` Mark van Atten
2021-03-29 15:43 ` Brantley Coile
2021-03-29 15:52 ` Mark van Atten
2021-03-29 15:45 ` Andy Kosela
2021-03-29 15:51 ` Clem Cole
2021-03-29 17:22 ` arnold
[not found] ` <CALMnNGgWrFRjXk5N4PgTj0_Yw3W5nCR2=CYSASM6dnqTooy8Dw@mail.gmail.com>
2021-03-30 8:53 ` arnold
2021-03-29 15:37 ` Clem Cole
2021-03-29 15:42 ` Anders Damsgaard
2021-03-29 15:49 ` Larry McVoy
2021-03-29 16:01 ` Andy Kosela
2021-03-29 18:12 ` Tom Ivar Helbekkmo via TUHS
2021-03-29 16:20 ` Steve Nickolas
2021-03-29 19:50 ` Rob Pike
2021-03-29 20:50 ` Michael Usher via TUHS
2021-03-29 20:55 ` Larry McVoy
2021-03-29 21:10 ` Erik E. Fair
2021-03-29 21:14 ` Larry McVoy
2021-03-29 21:53 ` Clem Cole
2021-03-29 22:29 ` John P. Linderman
2021-03-30 4:30 ` Rob Pike
2021-03-30 7:37 ` Harald Arnesen
2021-03-30 15:00 ` Kenneth Goodwin
2021-03-29 15:58 Norman Wilson
2021-03-30 0:11 ` John Cowan
2021-03-29 23:21 M Douglas McIlroy
2021-03-30 3:39 ` Rich Morin
[not found] <CAKH6PiXmR6Jv0bkyOtHuk1ZLV64aeW7bnQkUnzV9-G_JaUVDAA@mail.gmail.com>
2021-03-30 23:38 ` John Cowan
2021-03-31 2:34 ` Bakul Shah
2021-03-31 0:54 Norman Wilson
2021-03-31 1:29 ` John Cowan
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