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