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/* See LICENSE file for license details. */
#include <ctype.h>
#include <errno.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
static char *host = "irc.oftc.net";
static char *port = "6667";
static char *password;
static char nick[32];
static char bufin[4096];
static char bufout[4096];
static char channel[256];
static time_t trespond;
static FILE *srv;
#include "util.c"
static void
pout(char *channel, char *fmt, ...) {
static char timestr[18];
time_t t;
va_list ap;
va_start(ap, fmt);
vsnprintf(bufout, sizeof bufout, fmt, ap);
va_end(ap);
t = time(NULL);
strftime(timestr, sizeof timestr, "%D %R", localtime(&t));
fprintf(stdout, "%-12s: %s %s\n", channel, timestr, bufout);
}
static void
sout(char *fmt, ...) {
va_list ap;
va_start(ap, fmt);
vsnprintf(bufout, sizeof bufout, fmt, ap);
va_end(ap);
fprintf(srv, "%s\r\n", bufout);
}
static void
privmsg(char *channel, char *msg) {
if(channel[0] == '\0') {
pout("", "No channel to send to");
return;
}
pout(channel, "<%s> %s", nick, msg);
sout("PRIVMSG %s :%s", channel, msg);
}
static void
parsein(char *s) {
char c, *p;
if(s[0] == '\0')
return;
skip(s, '\n');
if(s[0] != ':') {
privmsg(channel, s);
return;
}
c = *++s;
if(c != '\0' && isspace(s[1])) {
p = s + 2;
switch(c) {
case 'j':
sout("JOIN %s", p);
if(channel[0] == '\0')
strlcpy(channel, p, sizeof channel);
return;
case 'l':
s = eat(p, isspace, 1);
p = eat(s, isspace, 0);
if(!*s)
s = channel;
if(*p)
*p++ = '\0';
if(!*p)
p = "sic - 250 LOC are too much!";
sout("PART %s :%s", s, p);
return;
case 'm':
s = eat(p, isspace, 1);
p = eat(s, isspace, 0);
if(*p)
*p++ = '\0';
privmsg(s, p);
return;
case 's':
strlcpy(channel, p, sizeof channel);
return;
}
}
sout("%s", s);
}
static void
parsesrv(char *cmd) {
char *usr, *par, *txt;
usr = host;
if(!cmd || !*cmd)
return;
if(cmd[0] == ':') {
usr = cmd + 1;
cmd = skip(usr, ' ');
if(cmd[0] == '\0')
return;
skip(usr, '!');
}
skip(cmd, '\r');
par = skip(cmd, ' ');
txt = skip(par, ':');
trim(par);
if(!strcmp("PONG", cmd))
return;
if(!strcmp("PRIVMSG", cmd))
pout(par, "<%s> %s", usr, txt);
else if(!strcmp("PING", cmd))
sout("PONG %s", txt);
else {
pout(usr, ">< %s (%s): %s", cmd, par, txt);
if(!strcmp("NICK", cmd) && !strcmp(usr, nick))
strlcpy(nick, txt, sizeof nick);
}
}
int
main(int argc, char *argv[]) {
int i, c;
struct timeval tv;
const char *user = getenv("USER");
fd_set rd;
strlcpy(nick, user ? user : "unknown", sizeof nick);
for(i = 1; i < argc; i++) {
c = argv[i][1];
if(argv[i][0] != '-' || argv[i][2])
c = -1;
switch(c) {
case 'h':
if(++i < argc) host = argv[i];
break;
case 'p':
if(++i < argc) port = argv[i];
break;
case 'n':
if(++i < argc) strlcpy(nick, argv[i], sizeof nick);
break;
case 'k':
if(++i < argc) password = argv[i];
break;
case 'v':
eprint("sic-"VERSION", © 2005-2012 Kris Maglione, Anselm R. Garbe, Nico Golde\n");
default:
eprint("usage: sic [-h host] [-p port] [-n nick] [-k keyword] [-v]\n");
}
}
/* init */
i = dial(host, port);
srv = fdopen(i, "r+");
/* login */
if(password)
sout("PASS %s", password);
sout("NICK %s", nick);
sout("USER %s localhost %s :%s", nick, host, nick);
fflush(srv);
setbuf(stdout, NULL);
setbuf(srv, NULL);
for(;;) { /* main loop */
FD_ZERO(&rd);
FD_SET(0, &rd);
FD_SET(fileno(srv), &rd);
tv.tv_sec = 120;
tv.tv_usec = 0;
i = select(fileno(srv) + 1, &rd, 0, 0, &tv);
if(i < 0) {
if(errno == EINTR)
continue;
eprint("sic: error on select():");
}
else if(i == 0) {
if(time(NULL) - trespond >= 300)
eprint("sic shutting down: parse timeout\n");
sout("PING %s", host);
continue;
}
if(FD_ISSET(fileno(srv), &rd)) {
if(fgets(bufin, sizeof bufin, srv) == NULL)
eprint("sic: remote host closed connection\n");
parsesrv(bufin);
trespond = time(NULL);
}
if(FD_ISSET(0, &rd)) {
if(fgets(bufin, sizeof bufin, stdin) == NULL)
eprint("sic: broken pipe\n");
parsein(bufin);
}
}
return 0;
}
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