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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
of this license document, but changing it is not allowed.
ocs was downloaded from <http://will.iki.fi/software/ocs/> and came with Preamble
the following COPYING file.
The GNU General Public License is a free, copyleft license for
software and other kinds of works.
Copyright (c) 2003-2004 Ville-Pertti Keinonen The licenses for most software and other practical works are designed
All rights reserved. to take away your freedom to share and change the works. By contrast,
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Redistribution and use in source and binary forms, with or without When we speak of free software, we are referring to freedom, not
modification, are permitted provided that the following conditions price. Our General Public Licenses are designed to make sure that you
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OCaml is not Irish.
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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>.

121
README
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@ -1,72 +1,97 @@
firebot 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 is not the bot you're looking for.
This framework gives you plenty of opportunity to shoot yourself in the foot.
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.
Getting Started Quickly Getting Started Quickly
======================= =======================
The `newmont` directory contains a very simple example, which you can The example handler script, called `newmont`, will get you started right away.
extend while it's running. It will connect to an IRC network, join It will set its nickname to `newmont`, join the channel `#newmont`, and respond
the channel `#dumont`, and respond to any channel massage containing to any channel message containing the substring "strawberry".
the substring "strawberry".
You should probably edit newmont/nickname and newmont/server before
trying this out. Set it to something hopefully unique on the network
you intend to join.
Start it like so: Start it like so:
./firebot newmont tcpclient YOUR.IRC.SERVER 6667 ./bot contrib/newmont
What's Going On
===============
What Everything Does There are three pieces involved.
====================
The core fuctionality exists as two C programs and a couple scripts:
firebot 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
------- -------
Reads in nick and realname, sets up a fifo, connects to the server The handler is launched once for each incoming message. It should decide
(or runs `$botdir/connect`), and hands off to `connect-handler`. what to do based on the environment variables and argv, possibly writing
something to stdout, and then it should exit.
Handlers are launched in parallel to each other. IRC is an asynchronous
protocol, and while messages do tend to arrive in a particular order, don't
count on it, especially with this framework.
`newmont` is a very simple handler script to reply to any PRIVMSG with the
substring "strawberry", in the (public) forum it was sent.
connect-handler Caution
--------------- =======
Sends the `NICK` and `USER` commands to the server (or runs Your handler is getting input provided by a potentially malicious adversary.
`$botdir/login`), then hands off to `dispatch irc-filter If you're not careful, you could create a remote exploit: a path through your
$botdir/handler`. 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
dispatch 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.
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-filter
----------
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.

2
TODO
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@ -1 +1 @@
* Convert the whole works over to stdio (non-blocking, of course)

204
bot.c
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@ -3,6 +3,7 @@
#include <unistd.h> #include <unistd.h>
#include <string.h> #include <string.h>
#include <stdlib.h> #include <stdlib.h>
#include <stdbool.h>
#include <ctype.h> #include <ctype.h>
#include <time.h> #include <time.h>
#include <errno.h> #include <errno.h>
@ -18,7 +19,6 @@
#define MAX_ARGS 50 #define MAX_ARGS 50
#define MAX_SUBPROCS 50 #define MAX_SUBPROCS 50
#define TARGET_MAX 20
#define max(a,b) ((a)>(b)?(a):(b)) #define max(a,b) ((a)>(b)?(a):(b))
@ -35,8 +35,10 @@ maybe_setenv(char *key, char *val)
} }
void void
irc_filter(char *line) irc_filter(const char *str)
{ {
char buf[4096];
char *line = buf;
char *parts[20] = {0}; char *parts[20] = {0};
int nparts; int nparts;
char snick[20]; char snick[20];
@ -47,6 +49,7 @@ irc_filter(char *line)
char *forum = NULL; char *forum = NULL;
int i; int i;
strncpy(buf, str, sizeof buf);
/* Tokenize IRC line */ /* Tokenize IRC line */
nparts = 0; nparts = 0;
if (':' == *line) { if (':' == *line) {
@ -152,37 +155,37 @@ irc_filter(char *line)
} }
} }
struct subproc { void
int fd; /* File descriptor */ unblock(int fd)
char buf[4000]; /* Read buffer */ {
size_t buflen; /* Buffer length */ int flags = fcntl(fd, F_GETFL, 0);
};
struct subproc subprocs[MAX_SUBPROCS] = { {0} }; fcntl(fd, F_SETFL, flags | O_NONBLOCK);
}
FILE *subprocs[MAX_SUBPROCS] = { 0 };
void void
dispatch(const char *buf, size_t buflen) sigchld(int signum)
{
while (0 < waitpid(-1, NULL, WNOHANG));
}
void
dispatch(char *text)
{ {
int subout[2]; int subout[2];
struct subproc *s = NULL;
int i; 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) { for (i = 0; i < MAX_SUBPROCS; i += 1) {
if (0 == subprocs[i].fd) { if (NULL == subprocs[i]) {
s = &subprocs[i];
break; break;
} }
} }
if (!s) {
fprintf(stderr, "Ignoring message: too many subprocesses\n"); if (MAX_SUBPROCS == i) {
fprintf(stderr, "warning: dropping message (too many children)\n");
return; return;
} }
@ -191,6 +194,14 @@ dispatch(const char *buf, size_t buflen)
return; return;
} }
subprocs[i] = fdopen(subout[0], "r");
if (! subprocs[i]) {
close(subout[0]);
close(subout[1]);
perror("fdopen");
return;
}
if (0 == fork()) { if (0 == fork()) {
/* /*
* Child * Child
@ -208,11 +219,10 @@ dispatch(const char *buf, size_t buflen)
* We'll be a good citizen and only close file descriptors we opened. * We'll be a good citizen and only close file descriptors we opened.
*/ */
close(null); close(null);
close(subout[0]);
close(subout[1]); close(subout[1]);
for (i = 0; i < MAX_SUBPROCS; i += 1) { for (i = 0; i < MAX_SUBPROCS; i += 1) {
if (subprocs[i].fd) { if (subprocs[i]) {
close(subprocs[i].fd); fclose(subprocs[i]);
} }
} }
@ -220,7 +230,7 @@ dispatch(const char *buf, size_t buflen)
exit(0); exit(0);
} }
s->fd = subout[0]; unblock(subout[0]);
close(subout[1]); close(subout[1]);
} }
@ -254,112 +264,43 @@ delay_output()
/** Writes all of buf to stdout, possibly blocking. */ /** Writes all of buf to stdout, possibly blocking. */
void void
output(const char *buf, size_t count) output(char *buf)
{ {
if (timerisset(&output_interval)) { if (timerisset(&output_interval)) {
delay_output(); delay_output();
} }
while (count) { puts(buf);
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 void
call_with_lines(char *buf, size_t * len, void (*func) (const char *, size_t)) handle_file(FILE *f, void (*func) (char *))
{
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_file(FILE *f, void (*func) (const char *, size_t))
{ {
char line[2048]; char line[2048];
size_t linelen; size_t linelen;
// Read a line. If we didn't have enough space, pretend it was a line // Read a line. If we didn't have enough space, drop it.
// anyway.
while (fgets(line, sizeof line, f)) { while (fgets(line, sizeof line, f)) {
linelen = strlen(line); linelen = strlen(line);
if (line[linelen-1] != '\n') { if (line[linelen-1] != '\n') {
line[linelen++] = '\n'; fprintf(stderr, "warning: dropping %d bytes (no trailing newline)\n", linelen);
} else {
line[linelen-1] = '\0';
func(line);
} }
func(line, linelen);
} }
} }
void void
handle_subproc(struct subproc *s) handle_input()
{ {
ssize_t len; handle_file(stdin, dispatch);
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) { void
fprintf(stderr, "subprocess buffer full, killing and discarding buffer.\n"); handle_subproc(FILE *s)
len = 0; {
} handle_file(s, output);
/*
* 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 void
@ -369,7 +310,10 @@ loop()
int ret; int ret;
int nfds = 0; int nfds = 0;
fd_set rfds; fd_set rfds;
static time_t last_pulse = 0;
time_t now;
// Look for messages in msgdir
if (msgdir) { if (msgdir) {
DIR *d = opendir(msgdir); DIR *d = opendir(msgdir);
@ -386,7 +330,8 @@ loop()
snprintf(fn, sizeof fn, "%s/%s", msgdir, ent->d_name); snprintf(fn, sizeof fn, "%s/%s", msgdir, ent->d_name);
f = fopen(fn, "r"); f = fopen(fn, "r");
if (f) { if (f) {
handle_file(f, output); // This one is blocking
handle_subproc(f);
fclose(f); fclose(f);
remove(fn); remove(fn);
} }
@ -398,42 +343,53 @@ loop()
} }
} }
// Check subprocs for input
FD_ZERO(&rfds); FD_ZERO(&rfds);
FD_SET(0, &rfds); FD_SET(0, &rfds);
for (i = 0; i < MAX_SUBPROCS; i += 1) { for (i = 0; i < MAX_SUBPROCS; i += 1) {
if (subprocs[i].fd) { if (subprocs[i]) {
FD_SET(subprocs[i].fd, &rfds); int fd = fileno(subprocs[i]);
nfds = max(nfds, subprocs[i].fd);
FD_SET(fd, &rfds);
nfds = max(nfds, fd);
} }
} }
do { do {
struct timeval timeout = {1, 0}; struct timeval timeout = {1, 0};
ret = select(nfds + 1, &rfds, NULL, NULL, msgdir?(&timeout):NULL); ret = select(nfds + 1, &rfds, NULL, NULL, &timeout);
} while ((-1 == ret) && (EINTR == errno)); } while ((-1 == ret) && (EINTR == errno));
if (-1 == ret) { if (-1 == ret) {
perror("select"); perror("select");
exit(EX_IOERR); exit(EX_IOERR);
} }
if (FD_ISSET(0, &rfds)) { if (FD_ISSET(0, &rfds)) {
handle_input(); handle_input();
} }
for (i = 0; i < MAX_SUBPROCS; i += 1) { for (i = 0; i < MAX_SUBPROCS; i += 1) {
if (subprocs[i].fd && FD_ISSET(subprocs[i].fd, &rfds)) { FILE *f = subprocs[i];
handle_subproc(&subprocs[i]);
if (f && FD_ISSET(fileno(f), &rfds)) {
handle_subproc(f);
if (feof(f)) {
fclose(f);
subprocs[i] = NULL;
} }
} }
} }
// Heartbeat
void now = time(NULL);
sigchld(int signum) if (now - last_pulse > 5) {
{ last_pulse = now;
while (0 < waitpid(-1, NULL, WNOHANG)); dispatch("PULSE");
} }
}
void void
usage(char *self) usage(char *self)
@ -500,8 +456,14 @@ main(int argc, char *argv[])
close(7); close(7);
} }
unblock(0);
setvbuf(stdout, NULL, _IOLBF, 0);
signal(SIGCHLD, sigchld); signal(SIGCHLD, sigchld);
// Let handler know we're starting up
dispatch("INIT");
while (1) { while (1) {
loop(); loop();
} }

23
connect-handler
View File

@ -1,23 +0,0 @@
#! /bin/sh -e
# 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
echo "NICK $nickname" 1>& $fd
echo "USER $nickname $nickname $nickname :$realname" 1>& $fd
fi
if [ -f $botdir/opts ]; then
read -r opts < $botdir/opts
else
opts="-i 500000"
fi
exec $ircdir/dispatch $fifo $opts $ircdir/irc-filter $botdir/handler

0
modules/infobot → contrib/infobot
View File

0
modules/notes → contrib/notes
View File

0
modules/utilbot → contrib/utilbot
View File

0
modules/whuffie → contrib/whuffie
View File

35
firebot
View File

@ -1,35 +0,0 @@
#! /bin/sh -e
if ! [ -d $1 ]; then
echo "Usage: $0 BOTDIR"
echo
echo "Starts a new bot with personality defined in BOTDIR."
exit 1
fi
botdir=$(cd $1; pwd)
ircdir=$(cd $(dirname $0); pwd)
export botdir ircdir
nickname=$(cat $botdir/nickname)
realname=$(cat $botdir/realname 2>/dev/null || \
echo "I'm a little printf, short and stdout.")
export nickname realname
if [ -p $botdir/fifo ]; then
mkfifo -m 0600 $botdir/fifo
fifo="-f $botdir/fifo"
export fifo
fi
if [ -x $botdir/connect ]; then
$botdir/connect $ircdir/connect-handler
else
server=$(cat $botdir/server)
if [ -z "$server" ]; then
echo "$0: no server specified in $botdir/server"
exit 1
fi
socat TCP:$server EXEC:$ircdir/connect-handler
fi

119
irc-esc.c
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@ -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;
}

37
newmont/handler
View File

@ -1,37 +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
newmont () {
case $text in
*strawberry*)
echo "mmmmm"
;;
esac
}
case $command in
001)
printf "\007JOIN %s\n" "#dumont"
;;
PRIVMSG)
[ $forum = "#dumont" ] && newmont
;;
esac | while read -r line; do
case "$line" in
*)
printf "%s\r\n" "${line#}"
;;
*)
printf "PRIVMSG %s :%s\r\n" "$forum" "$line"
;;
esac
done

1
newmont/nickname
View File

@ -1 +0,0 @@
newmont

1
newmont/server
View File

@ -1 +0,0 @@
moo.slashnet.org:6667