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- /* See LICENSE file for license details. */
- #include <sys/select.h>
- #include <ctype.h>
- #include <errno.h>
- #include <stdarg.h>
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
- #include <time.h>
- #include <unistd.h>
- #include "arg.h"
- #include "config.h"
- char *argv0;
- static char *host = DEFAULT_HOST;
- static char *port = DEFAULT_PORT;
- 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;
- #undef strlcpy
- #include "strlcpy.c"
- #include "util.c"
- static void
- pout(char *channel, char *fmt, ...) {
- static char timestr[80];
- 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, TIMESTAMP_FORMAT, 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] != COMMAND_PREFIX_CHARACTER) {
- 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 = DEFAULT_PARTING_MESSAGE;
- 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);
- }
- }
- static void
- usage(void) {
- eprint("usage: sic [-h host] [-p port] [-n nick] [-k keyword] [-v]\n", argv0);
- }
- int
- main(int argc, char *argv[]) {
- struct timeval tv;
- const char *user = getenv("USER");
- int n;
- fd_set rd;
- strlcpy(nick, user ? user : "unknown", sizeof nick);
- ARGBEGIN {
- case 'h':
- host = EARGF(usage());
- break;
- case 'p':
- port = EARGF(usage());
- break;
- case 'n':
- strlcpy(nick, EARGF(usage()), sizeof nick);
- break;
- case 'k':
- password = EARGF(usage());
- break;
- case 'v':
- eprint("sic-"VERSION", © 2005-2014 Kris Maglione, Anselm R. Garbe, Nico Golde\n");
- break;
- default:
- usage();
- } ARGEND;
- /* init */
- srv = fdopen(dial(host, port), "r+");
- if (!srv)
- eprint("fdopen:");
- /* 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);
- setbuf(stdin, NULL);
- #ifdef __OpenBSD__
- if (pledge("stdio", NULL) == -1)
- eprint("error: pledge:");
- #endif
- for(;;) { /* main loop */
- FD_ZERO(&rd);
- FD_SET(0, &rd);
- FD_SET(fileno(srv), &rd);
- tv.tv_sec = 120;
- tv.tv_usec = 0;
- n = select(fileno(srv) + 1, &rd, 0, 0, &tv);
- if(n < 0) {
- if(errno == EINTR)
- continue;
- eprint("sic: error on select():");
- }
- else if(n == 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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