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GPLv3 for all my stuff (everything but ocs and cdb.ml). GNU GENERAL PUBLIC LICENSE
Version 3, 29 June 2007
------------------------------------------------------------------------ Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
Everyone is permitted to copy and distribute verbatim copies
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ocs was downloaded from <http://will.iki.fi/software/ocs/> and came with Preamble
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Program, unless a warranty or assumption of liability accompanies a
copy of the Program in return for a fee.
END OF TERMS AND CONDITIONS
How to Apply These Terms to Your New Programs
If you develop a new program, and you want it to be of the greatest
possible use to the public, the best way to achieve this is to make it
free software which everyone can redistribute and change under these terms.
To do so, attach the following notices to the program. It is safest
to attach them to the start of each source file to most effectively
state the exclusion of warranty; and each file should have at least
the "copyright" line and a pointer to where the full notice is found.
<one line to give the program's name and a brief idea of what it does.>
Copyright (C) <year> <name of author>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
Also add information on how to contact you by electronic and paper mail.
If the program does terminal interaction, make it output a short
notice like this when it starts in an interactive mode:
<program> Copyright (C) <year> <name of author>
This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
This is free software, and you are welcome to redistribute it
under certain conditions; type `show c' for details.
The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License. Of course, your program's commands
might be different; for a GUI interface, you would use an "about box".
You should also get your employer (if you work as a programmer) or school,
if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU GPL, see
<http://www.gnu.org/licenses/>.
The GNU General Public License does not permit incorporating your program
into proprietary programs. If your program is a subroutine library, you
may consider it more useful to permit linking proprietary applications with
the library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License. But first, please read
<http://www.gnu.org/philosophy/why-not-lgpl.html>.

2
Makefile
View File

@ -1,5 +1,5 @@
CFLAGS = -Wall -Werror CFLAGS = -Wall -Werror
TARGETS = dispatch irc-filter irc-esc TARGETS = bot
all: $(TARGETS) all: $(TARGETS)

154
README
View File

@ -1,86 +1,102 @@
bot bot
=== ===
This is a suite of simple programs which allow you to write an IRC bot. This is a simple C program to assist writing an IRC bot in whatever language(s)
It is based on the Unix principle that one program should do one thing, you choose. It is based on the Unix principle that one program should do one
and makes extensive use of pipes, child processes, and passing of file thing.
descriptors.
Unless you are a seasoned Unix programmer or are willing to become one, This framework gives you plenty of opportunity to shoot yourself in the foot.
this is not the bot you're looking for. If you're not a seasoned programmer, please stick to a language like Python or
Lua for your handler. Leave the arcane trivia of proper Bourne Shell quoting
rules to the seasoned experts who've learned the hard way how to do it.
dispatch Getting Started Quickly
--------
Reads lines from stdin (or fd 6). Each line causes a fork and exec of a
specified program; the line is sent as the last argument. Any output
from children is passed through to stdout (or fd 7), optionally rate
limited. A fifo can optionally be specified on the command line;
anything written to it is treated identically to child output.
irc
---
Parses its last argument as a line from IRC. Determines prefix,
command, sender, forum (channel or user), and text; then invokes a
specified program with these as arguments. Also responds to server
pings as a convenience.
run
---
[run BOTDIR] will run the bot contained in $BOTDIR. It should contain
the following files (see cobalt in the distribution for examples):
* connect : program to open connection
* login : program to log in to IRC
* handler : program to handle IRC messages
firebot
-------
A private message handler providing a few handy commands.
infobot
-------
A private message handler providing infobot-like functionality.
notes
-----
A private message handler allowing users to leave notes for each other.
whuffie
-------
A private message handler keeping track of whuffe (also known as karma),
which is really just a meaningless number associated with your nick,
which other people can manipulate but you can't.
Putting it all together
======================= =======================
A full chain of programs would look something like The example handler script, called `newmont`, will get you started right away.
It will set its nickname to `newmont`, join the channel `#newmont`, and respond
to any channel message containing the substring "strawberry".
tcpclient -> connect-handler -> dispatch -> handler Start it like so:
and would be invoked as tcpclient YOUR.IRC.SERVER 6667 ./bot contrib/newmont
What's Going On
===============
There are three pieces involved.
tcpclient
---------
`tcpclient' is a program that connects to a TCP port, sets file descriptors 6
and 7 to be the input and output channels to that connection, and hands off
control to whatever program you specify (in the example above, the `./bot`
program with argument `./newmont`). There also exist a `udpclient`,
`sslclient`, and probably others. The advantage to this method is that
your network client doesn't have to care about the transport mechanism:
TCP, UDP, TCP6, SSL, or whatever else.
bot
---
`bot` reads one line at a time from fd6 (or 0 as a fallback), parses it up,
forks, sets some environment variables, and runs the "handler" program provided
as the first argument. Whatever that program prints to stdout is sent back to
the server, verbatim. As a convenience, it automatically responds to PING
messages from the server. It can also rate-limit messages to the server, so
your bot doesn't flood itself off IRC. Lastly, it can monitor a directory and
send the contents of any new file to the server, deleting the file after. This
allows you to write to IRC from a cron job, git post-update hook, or whatever
else you dream up.
`bot` sets the following environment variables:
prefix IRC line prefix: you probably don't care about this
command IRC command or numeric
sender nickname to send "private" replies to this message
forum nickname to send "public" replies to this message
text text of this message, like what's sent to the channel
Any additional parameters of the message, like with the MODE command, are
passed in as arguments to the handler.
handler
-------
The handler is launched once for each incoming message. It should decide
what to do based on the environment variables and argv, possibly writing
something to stdout, and then it should exit.
Handlers are launched in parallel to each other. IRC is an asynchronous
protocol, and while messages do tend to arrive in a particular order, don't
count on it, especially with this framework.
`newmont` is a very simple handler script to reply to any PRIVMSG with the
substring "strawberry", in the (public) forum it was sent.
Caution
=======
Your handler is getting input provided by a potentially malicious adversary.
If you're not careful, you could create a remote exploit: a path through your
handler script that allows anyone on IRC to do whatever they want on your
local computer.
You can write handlers in bourne shell: it's really easy. It's equally as
easy to accidentally allow remote control. There's nothing I can do in the
code I provide to prevent you from really hurting yourself, all I can do is
warn you.
$ tcpclient irc.host.org 6667 ./connect-handler cobalt
Author Author
------ ======
Neale Pickett <neale@woozle.org> Neale Pickett <neale@woozle.org>

1
TODO Normal file
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@ -0,0 +1 @@

24
bot
View File

@ -1,24 +0,0 @@
#! /bin/sh -e
botdir=$1
d=$(dirname $0)
nickname=$(cat $botdir/nickname)
realname=$(cat $botdir/realname 2>/dev/null || \
echo "I'm a little printf, short and stdout.")
export nickname realname
(
# UCSPI wants input on FD 7, and sets $PROTO
[ -n "$PROTO" ] && exec 1>&7
if [ -x $botdir/login ]; then
$botdir/login
else
echo "NICK $nickname"
echo "USER $nickname $nickname $nickname :$realname"
fi
)
[ -p $botdir/fifo ] || mkfifo -m 0600 $botdir/fifo
exec $d/dispatch -f $botdir/fifo $d/irc $botdir/handler

472
bot.c Normal file
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@ -0,0 +1,472 @@
#include <stdio.h>
#include <signal.h>
#include <unistd.h>
#include <string.h>
#include <stdlib.h>
#include <stdbool.h>
#include <ctype.h>
#include <time.h>
#include <errno.h>
#include <sysexits.h>
#include <sys/wait.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <dirent.h>
#include <fcntl.h>
#include "dump.h"
#define MAX_ARGS 50
#define MAX_SUBPROCS 50
#define max(a,b) ((a)>(b)?(a):(b))
char *handler = NULL;
char *msgdir = NULL;
struct timeval output_interval = {0};
void
maybe_setenv(char *key, char *val)
{
if (val) {
setenv(key, val, 1);
}
}
void
irc_filter(const char *str)
{
char buf[4096];
char *line = buf;
char *parts[20] = {0};
int nparts;
char snick[20];
char *cmd;
char *text = NULL;
char *prefix = NULL;
char *sender = NULL;
char *forum = NULL;
int i;
strncpy(buf, str, sizeof buf);
/* Tokenize IRC line */
nparts = 0;
if (':' == *line) {
prefix = line + 1;
} else {
parts[nparts++] = line;
}
while (*line) {
if (' ' == *line) {
*line++ = '\0';
if (':' == *line) {
text = line+1;
break;
} else {
parts[nparts++] = line;
}
} else {
line += 1;
}
}
/* Strip trailing carriage return */
while (*line) line += 1;
if ('\r' == *(line-1)) *(line-1) = '\0';
/* Set command, converting to upper case */
cmd = parts[0];
for (i = 0; cmd[i]; i += 1) {
cmd[i] = toupper(cmd[i]);
}
/* Extract prefix nickname */
for (i = 0; prefix && (prefix[i] != '!'); i += 1) {
if (i == sizeof(snick) - 1) {
i = 0;
break;
}
snick[i] = prefix[i];
}
snick[i] = '\0';
if (i) {
sender = snick;
}
/* Determine forum */
if ((0 == strcmp(cmd, "PRIVMSG")) ||
(0 == strcmp(cmd, "NOTICE"))) {
/* :neale!user@127.0.0.1 PRIVMSG #hydra :foo */
switch (parts[1][0]) {
case '#':
case '&':
case '+':
case '!':
forum = parts[1];
break;
default:
forum = snick;
break;
}
} else if ((0 == strcmp(cmd, "PART")) ||
(0 == strcmp(cmd, "MODE")) ||
(0 == strcmp(cmd, "TOPIC")) ||
(0 == strcmp(cmd, "KICK"))) {
forum = parts[1];
} else if (0 == strcmp(cmd, "JOIN")) {
if (0 == nparts) {
forum = text;
text = NULL;
} else {
forum = parts[1];
}
} else if (0 == strcmp(cmd, "INVITE")) {
forum = text?text:parts[2];
text = NULL;
} else if (0 == strcmp(cmd, "NICK")) {
sender = parts[1];
forum = sender;
} else if (0 == strcmp(cmd, "PING")) {
printf("PONG :%s\r\n", text);
fflush(stdout);
}
{
int _argc;
char *_argv[MAX_ARGS + 1];
maybe_setenv("handler", handler);
maybe_setenv("prefix", prefix);
maybe_setenv("command", cmd);
maybe_setenv("sender", sender);
maybe_setenv("forum", forum);
maybe_setenv("text", text);
_argc = 0;
_argv[_argc++] = handler;
for (i = 1; (i < nparts) && (_argc < MAX_ARGS); i += 1) {
_argv[_argc++] = parts[i];
}
_argv[_argc] = NULL;
execvp(handler, _argv);
perror(handler);
}
}
void
unblock(int fd)
{
int flags = fcntl(fd, F_GETFL, 0);
fcntl(fd, F_SETFL, flags | O_NONBLOCK);
}
FILE *subprocs[MAX_SUBPROCS] = { 0 };
void
sigchld(int signum)
{
while (0 < waitpid(-1, NULL, WNOHANG));
}
void
dispatch(char *text)
{
int subout[2];
int i;
for (i = 0; i < MAX_SUBPROCS; i += 1) {
if (NULL == subprocs[i]) {
break;
}
}
if (MAX_SUBPROCS == i) {
fprintf(stderr, "warning: dropping message (too many children)\n");
return;
}
if (-1 == pipe(subout)) {
perror("pipe");
return;
}
subprocs[i] = fdopen(subout[0], "r");
if (! subprocs[i]) {
close(subout[0]);
close(subout[1]);
perror("fdopen");
return;
}
if (0 == fork()) {
/*
* Child
*/
int null;
if ((-1 == (null = open("/dev/null", O_RDONLY))) ||
(-1 == dup2(null, 0)) ||
(-1 == dup2(subout[1], 1))) {
perror("fd setup");
exit(EX_OSERR);
}
/*
* We'll be a good citizen and only close file descriptors we opened.
*/
close(null);
close(subout[1]);
for (i = 0; i < MAX_SUBPROCS; i += 1) {
if (subprocs[i]) {
fclose(subprocs[i]);
}
}
irc_filter(text);
exit(0);
}
unblock(subout[0]);
close(subout[1]);
}
void
delay_output()
{
struct timeval now;
struct timeval diff;
static struct timeval output_last = { 0 };
gettimeofday(&now, NULL);
timersub(&now, &output_last, &diff);
if (timercmp(&diff, &output_interval, <)) {
struct timeval delay;
struct timespec ts;
int ret;
timersub(&output_interval, &diff, &delay);
ts.tv_sec = (time_t) delay.tv_sec;
ts.tv_nsec = (long) (delay.tv_usec * 1000);
do {
ret = nanosleep(&ts, &ts);
} while ((-1 == ret) && (EINTR == errno));
gettimeofday(&output_last, NULL);
} else {
output_last = now;
}
}
/** Writes all of buf to stdout, possibly blocking. */
void
output(char *buf)
{
if (timerisset(&output_interval)) {
delay_output();
}
puts(buf);
}
void
handle_file(FILE *f, void (*func) (char *))
{
char line[2048];
size_t linelen;
// Read a line. If we didn't have enough space, drop it.
while (fgets(line, sizeof line, f)) {
linelen = strlen(line);
if (line[linelen-1] != '\n') {
fprintf(stderr, "warning: dropping %d bytes (no trailing newline)\n", linelen);
} else {
line[linelen-1] = '\0';
func(line);
}
}
}
void
handle_input()
{
handle_file(stdin, dispatch);
}
void
handle_subproc(FILE *s)
{
handle_file(s, output);
}
void
loop()
{
int i;
int ret;
int nfds = 0;
fd_set rfds;
static time_t last_pulse = 0;
time_t now;
// Look for messages in msgdir
if (msgdir) {
DIR *d = opendir(msgdir);
while (d) {
struct dirent *ent = readdir(d);
if (! ent) {
break;
}
if (ent->d_type == DT_REG) {
char fn[PATH_MAX];
FILE *f;
snprintf(fn, sizeof fn, "%s/%s", msgdir, ent->d_name);
f = fopen(fn, "r");
if (f) {
// This one is blocking
handle_subproc(f);
fclose(f);
remove(fn);
}
}
}
if (d) {
closedir(d);
}
}
// Check subprocs for input
FD_ZERO(&rfds);
FD_SET(0, &rfds);
for (i = 0; i < MAX_SUBPROCS; i += 1) {
if (subprocs[i]) {
int fd = fileno(subprocs[i]);
FD_SET(fd, &rfds);
nfds = max(nfds, fd);
}
}
do {
struct timeval timeout = {1, 0};
ret = select(nfds + 1, &rfds, NULL, NULL, &timeout);
} while ((-1 == ret) && (EINTR == errno));
if (-1 == ret) {
perror("select");
exit(EX_IOERR);
}
if (FD_ISSET(0, &rfds)) {
handle_input();
}
for (i = 0; i < MAX_SUBPROCS; i += 1) {
FILE *f = subprocs[i];
if (f && FD_ISSET(fileno(f), &rfds)) {
handle_subproc(f);
if (feof(f)) {
fclose(f);
subprocs[i] = NULL;
}
}
}
// Heartbeat
now = time(NULL);
if (now - last_pulse > 5) {
last_pulse = now;
dispatch("PULSE");
}
}
void
usage(char *self)
{
fprintf(stderr, "Usage: %s [OPTIONS] HANDLER\n", self);
fprintf(stderr, "\n");
fprintf(stderr, "-h Display help.\n");
fprintf(stderr, "-d DIR Also dispatch messages from DIR, one per file.\n");
fprintf(stderr, "-i INTERVAL Wait at least INTERVAL microseconds between\n");
fprintf(stderr, " sending each line.\n");
}
int
main(int argc, char *argv[])
{
/*
* Parse command line
*/
while (!handler) {
switch (getopt(argc, argv, "hd:i:")) {
case -1:
if (optind >= argc) {
fprintf(stderr, "error: must specify event handler.\n");
usage(argv[0]);
return EX_USAGE;
}
handler = argv[optind];
break;
case 'd':
msgdir = optarg;
break;
case 'i':
{
char *end;
long long int interval;
interval = strtoll(optarg, &end, 10);
if (*end) {
fprintf(stderr, "error: not an integer number: %s\n", optarg);
return EX_USAGE;
}
output_interval.tv_sec = interval / 1000000;
output_interval.tv_usec = interval % 1000000;
}
break;
case 'h':
usage(argv[0]);
return 0;
default:
fprintf(stderr, "error: unknown option.\n");
usage(argv[0]);
return EX_USAGE;
}
}
/*
* tcpclient uses fds 6 and 7. If these aren't open, we keep the
* original fds 0 and 1.
*/
if (-1 != dup2(6, 0)) {
close(6);
}
if (-1 != dup2(7, 1)) {
close(7);
}
unblock(0);
setvbuf(stdout, NULL, _IOLBF, 0);
signal(SIGCHLD, sigchld);
// Let handler know we're starting up
dispatch("INIT");
while (1) {
loop();
}
return 0;
}

0
cobalt/channels/#woozle
View File

3
cobalt/connect
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@ -1,3 +0,0 @@
#! /bin/sh
exec socat OPENSSL:127.0.0.1:6697,verify=0,keepalive EXEC:"$*"

83
cobalt/handler
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@ -1,83 +0,0 @@
#! /bin/sh
prefix=$1; export prefix; shift
command=$1; export command; shift
sender=$1; export sender; shift
forum=$1; export forum; shift
text=$1; export text; shift
# $* is now args
# Debug output
#echo '>>>' ${prefix:+:}$prefix $command "$@" ${text:+:}"$text" 1>&2
raw () {
fmt="\007$1\n"; shift
printf "$fmt" "$@"
}
join () {
raw "JOIN $1"
}
cobalt () {
case "$1" in
air)
w3m -dump -cols 9999 'http://environweb.lanl.gov/Teom/teom30s.asp?MasterSiteID=211&offset=0' 2> /dev/null | \
awk '/.:..:.. .M/ {print "Los Alamos Air: " $5 "μg/m³ at " $2; exit}'
;;
nachos)
echo "aieeeee"
;;
*)
return 1
;;
esac
}
out=$(tempfile)
case $command in
001)
for i in $botdir/channels/*; do
join $(basename $i)
done
;;
433)
raw "NICK bot_$(shuf -c 1 /usr/share/dict/words)"
;;
PRIVMSG)
case "$forum" in
\#*)
cobalt "$text" || \
$ircdir/firebot "$text" || \
$ircdir/whuffie $botdir/whuffie.cdb "$text" || \
$ircdir/infobot $botdir/factoids.cdb "$text"
;;
esac
$ircdir/notes $botdir/notes "$text"
;;
INVITE)
join "$forum"
raw "PRIVMSG %s :Thanks for the invitation, %s." "$forum" "$sender"
touch $botdir/channels/$forum
;;
esac > $out
if [ "$forum" != "$sender" ] && [ $(wc -l < $out) -gt 5 ]; then
printf "PRIVMSG %s :Too many lines, sending privately.\r\n" "$forum"
forum=$sender
fi
while read -r line; do
case "$line" in
*)
printf "%s\r\n" "${line#}"
;;
*)
printf "PRIVMSG %s :%s\r\n" "$forum" "$line"
;;
esac
done < $out
rm -f $out

4
cobalt/login
View File

@ -1,4 +0,0 @@
#! /bin/sh
echo "NICK cobalt"
echo "USER cobalt cobalt cobalt :I'm a little printf, short and stdout."

28
connect-handler
View File

@ -1,28 +0,0 @@
#! /bin/sh -e
botdir=$1
ircdir=$(dirname $0)
export botdir ircdir
# UCSPI wants communication on fd7
if [ -n "$PROTO" ]; then
fd=7
else
fd=1
fi
if [ -x $botdir/login ]; then
$botdir/login 1 >& $fd
else
nickname=$(cat $botdir/nickname)
realname=$(cat $botdir/realname 2>/dev/null || \
echo "I'm a little printf, short and stdout.")
echo "NICK $nickname" 1 >& $fd
echo "USER $nickname $nickname $nickname :$realname" 1 >& $fd
fi
if [ -p $botdir/fifo ]; then
fifo="-f $botdir/fifo"
fi
exec $ircdir/dispatch $fifo $ircdir/irc-filter $botdir/handler

0
infobot → contrib/infobot
View File

70
contrib/newmont Executable file
View File

@ -0,0 +1,70 @@
#! /usr/bin/lua
--
-- Set global variables from environment
--
prefix = os.getenv("prefix")
forum = os.getenv("forum")
sender = os.getenv("sender")
command = os.getenv("command")
text = os.getenv("text")
--
-- Write text to stderr (for debugging)
--
function log(text)
io.stderr:write(text .. "\n")
end
--
-- Send a raw IRC command to the server
--
function raw(text)
log("< " .. text)
print(text)
end
--
-- Send a message to the forum; if we've sent 4 lines
-- already, start sending directly to the sender, to
-- avoid spamming channels.
--
msgs_sent = 0
msg_recip = forum
function msg(text)
msgs_sent = msgs_sent + 1
if ((msgs_sent == 5) and (forum ~= sender)) then
raw("PRIVMSG " .. forum .. " :Sending the rest in private")
msg_recip = sender
end
raw("PRIVMSG " .. msg_recip .. " :" .. text)
end
--
--
-- Main program
--
--
-- Log what we got
log(" > " .. (prefix or "") .. " " .. (sender or "-") .. "/" .. (forum or "-") .. " [" .. command .. "] :" .. (text or ""))
-- Our action depends on what the command is
if (command == "INIT") then
-- bot sends this when it first starts up, so we can log in
raw("NICK nemont")
raw("USER newmont newmont newmont :Sample bot")
elseif (command == "433") then
-- Couldn't get the nickname we asked for
raw("NICK bot_" .. (os.time() % 500))
elseif (command == "001") then
-- IRC server sends this after successful login
raw("JOIN #newmont")
elseif (command == "PRIVMSG") then
-- Somebody said something!
if (text:find("strawberry")) then
msg("Strawberries are delicious.")
end
end

0
notes → contrib/notes
View File

0
firebot → contrib/utilbot
View File

0
whuffie → contrib/whuffie
View File

349
dispatch.c
View File

@ -1,349 +0,0 @@
#include <stdio.h>
#include <unistd.h>
#include <stdarg.h>
#include <sysexits.h>
#include <stdlib.h>
#include <signal.h>
#include <time.h>
#include <fcntl.h>
#include <errno.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <sys/select.h>
#include <sys/time.h>
#include "dump.h"
#define MAX_ARGS 50
#define MAX_SUBPROCS 50
#define TARGET_MAX 20
#define max(a,b) ((a)>(b)?(a):(b))
struct subproc {
int fd; /* File descriptor */
char buf[4000]; /* Read buffer */
size_t buflen; /* Buffer length */
};
struct subproc subprocs[MAX_SUBPROCS] = {{0}};
/* Things set by argv parser */
char *handler = NULL;
char **handler_args;
struct timeval output_interval = {0};
struct timeval output_last = {0};
int fifoin = -1;
int fifoout = -1;
void
dispatch(const char *buf,
size_t buflen)
{
int subout[2];
struct subproc *s = NULL;
int i;
char text[512];
if (buflen > sizeof(text)) {
fprintf(stderr, "Ignoring message: too long (%u bytes)\n", (unsigned int)buflen);
return;
}
memcpy(text, buf, buflen-1); /* omit newline */
text[buflen-1] = '\0';
for (i = 0; i < MAX_SUBPROCS; i += 1) {
if (0 == subprocs[i].fd) {
s = &subprocs[i];
break;
}
}
if (! s) {
fprintf(stderr, "Ignoring message: too many subprocesses\n");
return;
}
if (-1 == pipe(subout)) {
perror("pipe");
return;
}
if (0 == fork()) {
/* Child */
char *argv[MAX_ARGS + 5];
int null;
int i;
if ((-1 == (null = open("/dev/null", O_RDONLY))) ||
(-1 == dup2(null, 0)) ||
(-1 == dup2(subout[1], 1))) {
perror("fd setup");
exit(EX_OSERR);
}
/* We'll be good citizens about this and only close file descriptors
we opened. */
close(fifoout);
close(null);
close(subout[0]);
close(subout[1]);
for (i = 0; i < MAX_SUBPROCS; i += 1) {
if (subprocs[i].fd) {
close(subprocs[i].fd);
}
}
i = 0;
argv[i++] = handler;
for (; handler_args[i-1]; i += 1) {
argv[i] = handler_args[i-1];
}
argv[i++] = text;
argv[i] = NULL;
execvp(handler, argv);
perror("exec");
exit(0);
}
s->fd = subout[0];
close(subout[1]);
}
void
delay_output()
{
struct timeval now, diff;
gettimeofday(&now, NULL);
timersub(&now, &output_last, &diff);
if (timercmp(&diff, &output_interval, <)) {
struct timeval delay;
struct timespec ts;
int ret;
timersub(&output_interval, &diff, &delay);
ts.tv_sec = (time_t)delay.tv_sec;
ts.tv_nsec = (long)(delay.tv_usec * 1000);
do {
ret = nanosleep(&ts, &ts);
} while ((-1 == ret) && (EINTR == errno));
gettimeofday(&output_last, NULL);
} else {
output_last = now;
}
}
/** Writes all of buf to stdout, possibly blocking. */
void
output(const char *buf,
size_t count)
{
if (timerisset(&output_interval)) {
delay_output();
}
while (count) {
ssize_t len;
do {
len = write(1, buf, count);
} while ((-1 == len) && (EINTR == errno));
if (-1 == len) {
perror("stdout");
exit(EX_IOERR);
}
count -= len;
buf += len;
}
}
void
call_with_lines(char *buf,
size_t *len,
void (*func)(const char *, size_t))
{
char *b = buf;
char *p;
size_t l = *len;
while ((p = memchr(b, '\n', l))) {
size_t n = p - b + 1;
func(b, n);
l -= n;
b += n;
}
memmove(buf, b, l);
*len = l;
}
char inbuf[8000];
size_t inbuflen = 0;
void
handle_input()
{
ssize_t len;
do {
len = read(0, inbuf + inbuflen, sizeof(inbuf) - inbuflen);
} while ((-1 == len) && (EINTR == errno));
if (0 == len) {
exit(0);
}
inbuflen += len;
call_with_lines(inbuf, &inbuflen, dispatch);
}
void
handle_subproc(struct subproc *s)
{
ssize_t len;
do {
len = read(s->fd, s->buf + s->buflen, sizeof(s->buf) - s->buflen);
} while ((-1 == len) && (EINTR == errno));
if (-1 == len) {
perror("subprocess read error");
} else {
s->buflen += len;
call_with_lines(s->buf, &s->buflen, output);
}
if (sizeof(s->buf) == s->buflen) {
fprintf(stderr, "subprocess buffer full, killing and discarding buffer.\n");
len = 0;
}
/* Recycle this subproc unless something was read */
if (0 >= len) {
if (s->buflen) {
fprintf(stderr, "warning: discarding %u characters from subprocess buffer\n",
(unsigned int)s->buflen);
}
close(s->fd);
s->fd = 0;
s->buflen = 0;
}
}
void
loop()
{
int i, ret;
int nfds = 0;
fd_set rfds;
FD_ZERO(&rfds);
FD_SET(0, &rfds);
for (i = 0; i < MAX_SUBPROCS; i += 1) {
if (subprocs[i].fd) {
FD_SET(subprocs[i].fd, &rfds);
nfds = max(nfds, subprocs[i].fd);
}
}
do {
ret = select(nfds+1, &rfds, NULL, NULL, NULL);
} while ((-1 == ret) && (EINTR == errno));
if (-1 == ret) {
perror("select");
exit(EX_IOERR);
}
if (FD_ISSET(0, &rfds)) {
handle_input();
}
for (i = 0; i < MAX_SUBPROCS; i += 1) {
if (subprocs[i].fd && FD_ISSET(subprocs[i].fd, &rfds)) {
handle_subproc(&subprocs[i]);
}
}
}
void
sigchld(int signum)
{
while (0 < waitpid(-1, NULL, WNOHANG));
}
void
usage(char *self)
{
fprintf(stderr, "Usage: %s [OPTIONS] handler [ARGS ...]\n", self);
fprintf(stderr, "\n");
fprintf(stderr, "-f FIFO Also dispatch messages from FIFO.\n");
fprintf(stderr, "-i INTERVAL Wait at least INTERVAL microseconds between\n");
fprintf(stderr, " sending each line.\n");
}
int
main(int argc, char *argv[])
{
/* Parse command line */
while (! handler) {
switch (getopt(argc, argv, "hf:i:")) {
case -1:
if (optind >= argc) {
fprintf(stderr, "error: must specify handler script.\n");
usage(argv[0]);
return EX_USAGE;
}
if (argc - optind - 10 > MAX_ARGS) {
fprintf(stderr, "error: too many arguments to helper.\n");
return EX_USAGE;
}
handler = argv[optind];
handler_args = argv + (optind + 1);
break;
case 'f':
if ((-1 == (fifoin = open(optarg, O_RDONLY | O_NONBLOCK))) ||
(-1 == (fifoout = open(optarg, O_WRONLY)))) {
perror("open fifo");
return EX_IOERR;
}
subprocs[0].fd = fifoin;
break;
case 'i':
{
char *end;
long long int interval;
interval = strtoll(optarg, &end, 10);
if (*end) {
fprintf(stderr, "error: not an integer number: %s\n", optarg);
return EX_USAGE;
}
output_interval.tv_sec = interval / 1000000;
output_interval.tv_usec = interval % 1000000;
}
break;
case 'h':
usage(argv[0]);
return 0;
default:
fprintf(stderr, "error: unknown option.\n");
usage(argv[0]);
return EX_USAGE;
}
}
/* tcpclient uses fds 6 and 7. If these aren't open, we keep the
original fds 0 and 1. */
if (-1 != dup2(6, 0)) close(6);
if (-1 != dup2(7, 1)) close(7);
signal(SIGCHLD, sigchld);
while (1) {
loop();
}
return 0;
}

119
irc-esc.c
View File

@ -1,119 +0,0 @@
#include <stdio.h>
enum {
RESET,
COLOR,
NOCOLOR,
BOLD,
UNDERLINE,
INVERSE
};
int color_map[] = {7, 0, 4, 2, 1, 1, 5, 3, 3, 2, 6, 6, 4, 5, 0, 7};
void
change_state(int what, int foreground, int background)
{
static int bf = 0;
static int ul = 0;
static int rv = 0;
static int fg = -1;
static int bg = -1;
switch (what) {
case RESET:
fg = -1;
bg = -1;
bf = 0;
ul = 0;
rv = 0;
break;
case COLOR:
fg = (foreground<16)?color_map[foreground]:-1;
bg = (background<16)?color_map[background]:-1;
break;
case NOCOLOR:
fg = -1;
bg = -1;
break;
case BOLD:
bf = !bf;
break;
case UNDERLINE:
ul = !ul;
break;
case INVERSE:
rv = !rv;
break;
}
printf("\033[0");
if (bf) printf(";1");
if (ul) printf(";4");
if (rv) printf(";7");
if (0 <= fg) printf(";3%d", fg);
if (0 <= bg) printf(";4%d", bg);
printf("m");
}
int
read_num()
{
int acc = 0;
int fail = 1;
while (1) {
int c = getchar();
if ((c >= '0') && (c <= '9')) {
acc = (acc * 10) + (c - '0');
} else {
ungetc(c, stdin);
break;
}
fail = 0;
}
return fail?-1:acc;
}
int
main(int argc, char *argv[])
{
while (! feof(stdin)) {
int c = getchar();
if (EOF == c) {
break;
} else if (0 == c) {
printf("\\0");
} else if (3 == c) { /* mIRC color */
int fg = read_num();
int bg = -1;
c = getchar();
if (',' == c) {
bg = read_num();
} else {
ungetc(c, stdin);
}
change_state(COLOR, fg, bg);
} else if (2 == c) {
change_state(BOLD, 0, 0);
} else if (22 == c) {
change_state(INVERSE, 0, 0);
} else if (31 == c) {
change_state(UNDERLINE, 0, 0);
} else if (15 == c) {
change_state(RESET, 0, 0);
} else if ('\n' == c) {
change_state(RESET, 0, 0);
putchar(c);
} else if (32 > c) {
printf("^%c", c + 'A' - 1);
} else {
putchar(c);
}
}
change_state(RESET, 0, 0);
return 0;
}

155
irc-filter.c
View File

@ -1,155 +0,0 @@
#include <stdio.h>
#include <ctype.h>
#include <string.h>
#include <unistd.h>
#include <sysexits.h>
#include "dump.h"
#define MAX_ARGS 50
#define MAX_OUTARGS 60
#define MAX_PARTS 20
int
main(int argc, char *argv[])
{
char *parts[20] = {0};
int nparts;
char snick[20];
char *cmd;
char *text = NULL;
char *prefix = NULL;
char *sender = NULL;
char *forum = NULL;
int i;
if (argc < 3) {
fprintf(stderr, "Usage: %s HANDLER [ARGV ...] LINE\n", argv[0]);
fprintf(stderr, "\n");
fprintf(stderr, "Parses LINE (an IRC message) into:\n");
fprintf(stderr, " PREFIX Prefix part of message\n");
fprintf(stderr, " COMMAND IRC command\n");
fprintf(stderr, " SENDER Nickname of message's sender\n");
fprintf(stderr, " FORUM Forum of message\n");
fprintf(stderr, " TEXT Text part of message\n");
fprintf(stderr, " ARGS... Arguments of message\n");
fprintf(stderr, "\n");
fprintf(stderr, "After parsing, exec()s\n");
fprintf(stderr, " HANDLER ARGV... PREFIX COMMAND SENDER FORUM TEXT ARGS...\n");
return EX_USAGE;
} else if (argc > MAX_ARGS) {
fprintf(stderr, "%s: too many arguments\n", argv[0]);
return EX_USAGE;
}
/* Tokenize IRC line */
{
char *line = argv[argc-1];
nparts = 0;
if (':' == *line) {
prefix = line + 1;
} else {
parts[nparts++] = line;
}
while (*line) {
if (' ' == *line) {
*line++ = '\0';
if (':' == *line) {
text = line+1;
break;
} else {
parts[nparts++] = line;
}
} else {
line += 1;
}
}
/* Strip trailing carriage return */
while (*line) line += 1;
if ('\r' == *(line-1)) *(line-1) = '\0';
}
/* Set command, converting to upper case */
cmd = parts[0];
for (i = 0; cmd[i]; i += 1) {
cmd[i] = toupper(cmd[i]);
}
/* Extract prefix nickname */
for (i = 0; prefix && (prefix[i] != '!'); i += 1) {
if (i == sizeof(snick) - 1) {
i = 0;
break;
}
snick[i] = prefix[i];
}
snick[i] = '\0';
if (i) {
sender = snick;
}
/* Determine forum */
if ((0 == strcmp(cmd, "PRIVMSG")) ||
(0 == strcmp(cmd, "NOTICE"))) {
/* :neale!user@127.0.0.1 PRIVMSG #hydra :foo */
switch (parts[1][0]) {
case '#':
case '&':
case '+':
case '!':
forum = parts[1];
break;
default:
forum = snick;
break;
}
} else if ((0 == strcmp(cmd, "PART")) ||
(0 == strcmp(cmd, "MODE")) ||
(0 == strcmp(cmd, "TOPIC")) ||
(0 == strcmp(cmd, "KICK"))) {
forum = parts[1];
} else if (0 == strcmp(cmd, "JOIN")) {
DUMP_d(nparts);
if (1 == nparts) {
forum = text;
text = NULL;
} else {
forum = parts[1];
}
} else if (0 == strcmp(cmd, "INVITE")) {
forum = text?text:parts[2];
text = NULL;
} else if (0 == strcmp(cmd, "NICK")) {
sender = parts[1];
forum = sender;
} else if (0 == strcmp(cmd, "PING")) {
printf("PONG :%s\r\n", text);
fflush(stdout);
}
{
int _argc;
char *_argv[MAX_OUTARGS + 1];
_argc = 0;
for (i = 1; i < argc-1; i += 1) {
_argv[_argc++] = argv[i];
}
_argv[_argc++] = prefix?prefix:"";
_argv[_argc++] = cmd;
_argv[_argc++] = sender?sender:"";
_argv[_argc++] = forum?forum:"";
_argv[_argc++] = text?text:"";
for (i = 1; (i < nparts) && (_argc < MAX_OUTARGS); i += 1) {
_argv[_argc++] = parts[i];
}
_argv[_argc] = NULL;
execvp(_argv[0], _argv);
perror(_argv[0]);
}
return 0;
}

29
rollforinitiative.py
View File

@ -1,29 +0,0 @@
#!/usr/bin/env python
import re
import sys
import random
if __name__ == '__main__':
roll = sys.argv[1]
m = re.match('^(?P<rolls>\d+)d(?P<sides>\d+)(x(?P<multiplier>\d+))?$', roll)
if m:
rolls = int(m.group('rolls'))
sides = int(m.group('sides'))
if m.group('multiplier'):
multiplier = int(m.group('multiplier'))
else:
multiplier = 1
dice = []
acc = 0
for i in range(rolls):
n = random.randint(1, sides)
dice.append(n)
acc += n
acc *= multiplier
if rolls > 1:
print '%s: %d %r' % (roll, acc, dice)
else:
print '%s: %d' % (roll, acc)

16
run
View File

@ -1,16 +0,0 @@
#! /bin/sh -e
botdir=$1
ircdir=$(dirname $0)
export botdir ircdir
if [ ! -d "$botdir" ]; then
exec 1>&2
echo "Usage: $0 BOTDIRECTORY"
exit 1
fi
while true; do
$botdir/connect $ircdir/connect-handler $botdir
sleep 5
done