cleanup

.hgtags

@@ -1,2 +1,10 @@
 de32c537aaf66554894712563ffba8d9bc4c2714 0.1
 56350a01f27753cfbdbb3dbc25f2a53dd4c2ac45 0.2
+d77f00af559258679a0fad5d264685d663e6975a 0.3
+a3549fb4c72ff0edb816c8c29be7ff289db5b003 0.4
+70d49a37b35695f2f771bddaf309f05ea60af8bc 0.5
+d7923d9e717c1c6f1ed3b17ec90bfdd7e7bfcca0 0.6
+643a6e8b8634b70d2459637fcfff6eca776fc919 0.7
+07fb3efaa2e9ed18c6c16f0ddd8576cb66fec9c6 0.8
+96eb1bfede5b72fcee3f515d3113d814f7e87108 0.9
+b8794f3ed15e34b24ff9fb11c93a4405d0f91433 1.0

LICENSE

@@ -1,7 +1,9 @@
 MIT/X Consortium License
 
-(C)opyright MMV-MMVI Anselm R. Garbe <garbeam@gmail.com>
+© 2005-2009 Anselm R Garbe <anselm@garbe.us>
-(C)opyright MMV Nico Golde <nico at ngolde dot de>
+© 2008-2009 Jeroen Schot <schot@a-eskwadraat.nl>
+© 2007-2009 Kris Maglione <maglione.k@gmail.com>
+© 2005 Nico Golde <nico at ngolde dot de>
 
 Permission is hereby granted, free of charge, to any person obtaining a
 copy of this software and associated documentation files (the "Software"),

Makefile

@@ -1,5 +1,4 @@
 # sic - simple irc client
-#   (C)opyright MMVI Anselm R. Garbe
 
 include config.mk
 
@@ -13,7 +12,6 @@ options:
 	@echo "CFLAGS   = ${CFLAGS}"
 	@echo "LDFLAGS  = ${LDFLAGS}"
 	@echo "CC       = ${CC}"
-	@echo "LD       = ${LD}"
 
 .c.o:
 	@echo CC $<
@@ -22,9 +20,8 @@ options:
 ${OBJ}: config.mk
 
 sic: ${OBJ}
-	@echo LD $@
+	@echo CC -o $@
-	@${LD} -o $@ ${OBJ} ${LDFLAGS}
+	@${CC} -o $@ ${OBJ} ${LDFLAGS}
-	@strip $@
 
 clean:
 	@echo cleaning
@@ -45,7 +42,7 @@ install: all
 	@chmod 755 ${DESTDIR}${PREFIX}/bin/sic
 	@echo installing manual page to ${DESTDIR}${MANPREFIX}/man1
 	@mkdir -p ${DESTDIR}${MANPREFIX}/man1
-	@sed 's/VERSION/${VERSION}/g' < sic.1 > ${DESTDIR}${MANPREFIX}/man1/sic.1
+	@sed "s/VERSION/${VERSION}/g" < sic.1 > ${DESTDIR}${MANPREFIX}/man1/sic.1
 	@chmod 644 ${DESTDIR}${MANPREFIX}/man1/sic.1
 
 uninstall:

README

@@ -1,11 +1,11 @@
 sic - simple irc client
------------------------
+=======================
-
 sic is an extremly fast, small and simple irc client.  It reads commands from
 standard input and prints all server output to standard output. It multiplexes
 also all channel traffic into one output, that you don't have to switch
 different channel buffers, that's actually a feature.
 
+
 Installation
 ------------
 Edit config.mk to match your local setup. sic is installed into
@@ -16,11 +16,7 @@ Afterwards enter the following command to build and install sic
 
     $ make clean install
 
+
 Running sic
 -----------
 Simply invoke the 'sic' command with the required arguments.
-
-
-Configuration
--------------
-No configuration is needed.

config.mk

@@ -1,5 +1,5 @@
 # sic version
-VERSION = 0.3
+VERSION = 1.1
 
 # Customize below to fit your system
 
@@ -12,11 +12,9 @@ INCS = -I. -I/usr/include
 LIBS = -L/usr/lib -lc
 
 # flags
-CFLAGS = -Os ${INCS} -DVERSION=\"${VERSION}\"
+CPPFLAGS = -DVERSION=\"${VERSION}\" -D_GNU_SOURCE
-LDFLAGS = ${LIBS}
+CFLAGS = -std=c99 -pedantic -Wall -Os ${INCS} ${CPPFLAGS}
-#CFLAGS = -g -Wall -O2 ${INCS} -DVERSION=\"${VERSION}\"
+LDFLAGS = -s ${LIBS}
-#LDFLAGS = -g ${LIBS}
 
 # compiler and linker
 CC = cc
-LD = ${CC}

sic.1

@@ -3,11 +3,10 @@
 sic \- simple irc client
 .SH SYNOPSIS
 .B sic
-.RB [ \-s <server> ]
+.RB [ \-h " <host>"]
-.RB [ \-p <port> ]
+.RB [ \-p " <port>"]
-.RB [ \-n <nick> ]
+.RB [ \-n " <nick>"]
-.RB [ \-k <keyword> ]
+.RB [ \-k " <keyword>"]
-.RB [ \-f <fullname> ]
 .RB [ \-v ]
 .SH DESCRIPTION
 .B sic
@@ -17,8 +16,8 @@ also all channel traffic into one output, that you don't have to switch
 different channel buffers, that's actually a feature.
 .SH OPTIONS
 .TP
-.B \-s <server>
+.B \-h <host>
-Overrides the default server (irc.oftc.net)
+Overrides the default host (irc6.oftc.net)
 .TP
 .B \-p <port>
 Overrides the default port (6667)
@@ -27,29 +26,22 @@ Overrides the default port (6667)
 Override the default nick ($USER)
 .TP
 .B \-k <keyword>
-Specifies the keyword to authenticate your nick on the server
+Specifies the keyword to authenticate your nick on the host
-.TP
-.B \-f <fullname>
-Specify the real name (default is $USER)
 .TP
 .BI \-v
 Prints version information to standard output, then exits.
 .SH COMMANDS
 .TP
-.B /j #channel
+.B :j #channel
 Join a channel
 .TP
-.B /l #channel
+.B :l #channel
 Leave a channel
 .TP
-.B /m #channel/user msg
+.B :m #channel/user msg
 Write a message to #channel/user
 .TP
-.B /s #channel/user
+.B :s #channel/user
 Set default channel/user
 .TP
-.B /t topic
+Everything which is not a command is simply send the server.
-Set the channel topic
-.TP
-Everything which is not a command will simply be posted into the channel or to
-the server.

sic.c

@@ -1,339 +1,207 @@
-/*
+ /* See LICENSE file for license details. */
- * (C)opyright MMV-MMVI Anselm R. Garbe <garbeam at gmail dot com>
+#include <ctype.h>
- * (C)opyright MMV-MMVI Nico Golde <nico at ngolde dot de>
- * See LICENSE file for license details.
- */
-
 #include <errno.h>
-#include <netdb.h>
+#include <stdarg.h>
-#include <netinet/in.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <time.h>
 #include <unistd.h>
-#include <sys/socket.h>
-#include <sys/time.h>
 
-#define PINGTIMEOUT 300
+static char *host = "irc.oftc.net";
-#define MAXMSG 4096
+static char *port = "ircd";
-
+static char *password;
-enum { Tnick, Tuser, Tcmd, Tchan, Targ, Ttext, Tlast };
+static char nick[32];
-
+static char bufin[4096];
-static char *server = "irc.oftc.net";
+static char bufout[4096];
-static unsigned short port = 6667;
-static char *nick = NULL;
-static char *fullname = NULL;
-static char *password = NULL;
-
-static char bufin[MAXMSG], bufout[MAXMSG];
 static char channel[256];
-static int srv;
 static time_t trespond;
+static FILE *srv;
 
-static int
+#include "util.c"
-getline(int fd, unsigned int len, char *buf)
-{
-	unsigned int i = 0;
-	char c;
-	do {
-		if(read(fd, &c, sizeof(char)) != sizeof(char))
-			return -1;
-		buf[i++] = c;
-	}
-	while(c != '\n' && i < len);
-	buf[i - 1] = 0;
-	return 0;
-}
 
 static void
-pout(char *channel, char *msg)
+pout(char *channel, char *fmt, ...) {
-{
 	static char timestr[18];
-	time_t t = time(0);
+	time_t t;
+	va_list ap;
 
-	strftime(timestr, sizeof(timestr), "%a %R", localtime(&t));
+	va_start(ap, fmt);
-	fprintf(stdout, "%-8.8s: %s %s\n", channel, timestr, msg);
+	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
-privmsg(char *channel, char *msg)
+sout(char *fmt, ...) {
-{
+	va_list ap;
-	snprintf(bufout, sizeof(bufout), "<%s> %s", nick, msg);
+
-	pout(channel, bufout);
+	va_start(ap, fmt);
-	snprintf(bufout, sizeof(bufout), "PRIVMSG %s :%s\r\n", channel, msg);
+	vsnprintf(bufout, sizeof bufout, fmt, ap);
-	write(srv, bufout, strlen(bufout));
+	va_end(ap);
+	fprintf(srv, "%s\r\n", bufout);
 }
 
 static void
-parsein(char *msg)
+privmsg(char *channel, char *msg) {
-{
+	if(channel[0] == '\0') {
-	char *p;
+		pout("", "No channel to send to");
-
-	if(msg[0] == 0)
-		return;
-	if(msg[0] != '/') {
-		privmsg(channel, msg);
 		return;
 	}
-	if(!strncmp(msg + 1, "j ", 2) && (msg[3] == '#'))
+	pout(channel, "<%s> %s", nick, msg);
-		snprintf(bufout, sizeof(bufout), "JOIN %s\r\n", &msg[3]);
+	sout("PRIVMSG %s :%s", channel, msg);
-	else if(!strncmp(msg + 1, "l ", 2))
-		snprintf(bufout, sizeof(bufout), "PART %s :sic\r\n", &msg[3]);
-	else if(!strncmp(msg + 1, "m ", 2)) {
-		if(p = strchr(&msg[3], ' '))
-			*(p++) = 0;
-		privmsg(&msg[3], p);
-		return;
-	}
-	else if(!strncmp(msg + 1, "s ", 2)) {
-		strncpy(channel, &msg[3], sizeof(channel));
-		return;
-	}
-	else if(!strncmp(msg + 1, "t ", 2)) {
-		if(p = strchr(&msg[3], ' '))
-			*(p++) = 0;
-		snprintf(bufout, sizeof(bufout), "TOPIC %s :%s\r\n", &msg[3], p);
-	}
-	else
-		snprintf(bufout, sizeof(bufout), "%s\r\n", &msg[1]);
-	write(srv, bufout, strlen(bufout));
-}
-
-static unsigned int
-tokenize(char **result, unsigned int reslen, char *str, char delim)
-{
-	char *p, *n;
-	unsigned int i = 0;
-
-	if(!str)
-		return 0;
-	for(n = str; *n == delim; n++);
-	p = n;
-	for(i = 0; *n != 0;) {
-		if(i == reslen)
-			return i;
-		if(*n == delim) {
-			*n = 0;
-			if(strlen(p))
-				result[i++] = p;
-			p = ++n;
-		} else
-			n++;
-	}
-	if((i < reslen) && (p < n) && strlen(p))
-		result[i++] = p;
-	return i;	/* number of tokens */
 }
 
 static void
-parsesrv(char *msg)
+parsein(char *s) {
-{
+	char c, *p;
-	char *argv[Tlast], *cmd, *p;
+
-	int i;
+	if(s[0] == '\0')
-	if(!msg || !(*msg))
+		return;
+	skip(s, '\n');
+	if(s[0] != ':') {
+		privmsg(channel, s);
 		return;
-
-	for(i = 0; i < Tlast; i++)
-		argv[i] = NULL;
-
-	/*
-	   <bufout>  ::= [':' <prefix> <SPACE> ] <command> <params> <crlf>
-	   <prefix>   ::= <servername> | <nick> [ '!' <user> ] [ '@' <server> ]
-	   <command>  ::= <letter> { <letter> } | <number> <number> <number>
-	   <SPACE>    ::= ' ' { ' ' }
-	   <params>   ::= <SPACE> [ ':' <trailing> | <middle> <params> ]
-	   <middle>   ::= <Any *non-empty* sequence of octets not including SPACE
-	   or NUL or CR or LF, the first of which may not be ':'>
-	   <trailing> ::= <Any, possibly *empty*, sequence of octets not including NUL or CR or LF>
-	   <crlf>     ::= CR LF
-	 */
-	if(msg[0] == ':') { /* check prefix */
-		p = strchr(msg, ' ');
-		*p = 0;
-		for(++p; *p == ' '; p++);
-		cmd = p;
-		argv[Tnick] = &msg[1];
-		if((p = strchr(msg, '!'))) {
-			*p = 0;
-			argv[Tuser] = ++p;
 	}
-	} else
+	c = *++s;
-		cmd = msg;
+	if(c != '\0' && isspace(s[1])) {
-
+		p = s + 2;
-	/* remove CRLFs */
+		switch(c) {
-	for(p = cmd; p && *p != 0; p++)
+		case 'j':
-		if(*p == '\r' || *p == '\n')
+			sout("JOIN %s", p);
-			*p = 0;
+			if(channel[0] == '\0')
-
+				strlcpy(channel, p, sizeof channel);
-	if((p = strchr(cmd, ':'))) {
+			return;
-		*p = 0;
+		case 'l':
-		argv[Ttext] = ++p;
+			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;
 		}
-	tokenize(&argv[Tcmd], Tlast - Tcmd, cmd, ' ');
-
-	if(!strncmp("PONG", argv[Tcmd], 5)) {
-		return;
-	} else if(!strncmp("PING", argv[Tcmd], 5)) {
-		snprintf(bufout, sizeof(bufout), "PONG %s\r\n", argv[Ttext]);
-		write(srv, bufout, strlen(bufout));
-		return;
-	} else if(!argv[Tnick] || !argv[Tuser]) {	/* server command */
-		snprintf(bufout, sizeof(bufout), "%s", argv[Ttext] ? argv[Ttext] : "");
-		pout(server, bufout);
-		return;
-	} else if(!strncmp("ERROR", argv[Tcmd], 6))
-		snprintf(bufout, sizeof(bufout), "-!- error %s",
-				argv[Ttext] ? argv[Ttext] : "unknown");
-	else if(!strncmp("JOIN", argv[Tcmd], 5)) {
-		if(argv[Ttext]!=NULL){
-			p = strchr(argv[Ttext], ' ');
-		if(p)
-			*p = 0;
 	}
-		argv[Tchan] = argv[Ttext];
+	sout("%s", s);
-		snprintf(bufout, sizeof(bufout), "-!- %s(%s) has joined %s",
+}
-				argv[Tnick], argv[Tuser], argv[Ttext]);
+
-	} else if(!strncmp("PART", argv[Tcmd], 5)) {
+static void
-		snprintf(bufout, sizeof(bufout), "-!- %s(%s) has left %s",
+parsesrv(char *cmd) {
-				argv[Tnick], argv[Tuser], argv[Tchan]);
+	char *usr, *par, *txt;
-	} else if(!strncmp("MODE", argv[Tcmd], 5))
+
-		snprintf(bufout, sizeof(bufout), "-!- %s changed mode/%s -> %s %s",
+	usr = host;
-				argv[Tnick], argv[Tcmd + 1],
+	if(!cmd || !*cmd)
-				argv[Tcmd + 2], argv[Tcmd + 3]);
+		return;
-	else if(!strncmp("QUIT", argv[Tcmd], 5))
+	if(cmd[0] == ':') {
-		snprintf(bufout, sizeof(bufout), "-!- %s(%s) has quit \"%s\"",
+		usr = cmd + 1;
-				argv[Tnick], argv[Tuser],
+		cmd = skip(usr, ' ');
-				argv[Ttext] ? argv[Ttext] : "");
+		if(cmd[0] == '\0')
-	else if(!strncmp("NICK", argv[Tcmd], 5))
+			return;
-		snprintf(bufout, sizeof(bufout), "-!- %s changed nick to %s",
+		skip(usr, '!');
-				argv[Tnick], argv[Ttext]);
+	}
-	else if(!strncmp("TOPIC", argv[Tcmd], 6))
+	skip(cmd, '\r');
-		snprintf(bufout, sizeof(bufout), "-!- %s changed topic to \"%s\"",
+	par = skip(cmd, ' ');
-				argv[Tnick], argv[Ttext] ? argv[Ttext] : "");
+	txt = skip(par, ':');
-	else if(!strncmp("KICK", argv[Tcmd], 5))
+	trim(par);
-		snprintf(bufout, sizeof(bufout), "-!- %s kicked %s (\"%s\")",
+	if(!strcmp("PONG", cmd))
-				argv[Tnick], argv[Targ],
+		return;
-				argv[Ttext] ? argv[Ttext] : "");
+	if(!strcmp("PRIVMSG", cmd))
-	else if(!strncmp("NOTICE", argv[Tcmd], 7))
+		pout(par, "<%s> %s", usr, txt);
-		snprintf(bufout, sizeof(bufout), "-!- \"%s\")",
+	else if(!strcmp("PING", cmd))
-				argv[Ttext] ? argv[Ttext] : "");
+		sout("PONG %s", txt);
-	else if(!strncmp("PRIVMSG", argv[Tcmd], 8))
+	else {
-		snprintf(bufout, sizeof(bufout), "<%s> %s",
+		pout(usr, ">< %s (%s): %s", cmd, par, txt);
-				argv[Tnick], argv[Ttext] ? argv[Ttext] : "");
+		if(!strcmp("NICK", cmd) && !strcmp(usr, nick))
-	if(!argv[Tchan] || !strncmp(argv[Tchan], nick, strlen(nick)))
+			strlcpy(nick, txt, sizeof nick);
-		pout(argv[Tnick], bufout);
+	}
-	else
-		pout(argv[Tchan], bufout);
 }
 
 int
-main(int argc, char *argv[])
+main(int argc, char *argv[]) {
-{
+	int i, c;
-	int i;
 	struct timeval tv;
-	struct hostent *hp;
+	const char *user = getenv("USER");
-	static struct sockaddr_in addr;  /* initially filled with 0's */
-	char ping[256];
 	fd_set rd;
 
-	nick = fullname = getenv("USER");
+	strlcpy(nick, user ? user : "unknown", sizeof nick);
-	for(i = 1; (i < argc) && (argv[i][0] == '-'); i++) {
+	for(i = 1; i < argc; i++) {
-		switch (argv[i][1]) {
+		c = argv[i][1];
-		default:
+		if(argv[i][0] != '-' || argv[i][2])
-			fputs("usage: sic [-s server] [-p port] [-n nick]"
+			c = -1;
-					" [-k keyword] [-f fullname] [-v]\n", stderr);
+		switch(c) {
-			exit(EXIT_FAILURE);
+		case 'h':
-			break;
+			if(++i < argc) host = argv[i];
-		case 's':
-			server = argv[++i];
 			break;
 		case 'p':
-			port = (unsigned short)atoi(argv[++i]);
+			if(++i < argc) port = argv[i];
 			break;
 		case 'n':
-			nick = argv[++i];
+			if(++i < argc) strlcpy(nick, argv[i], sizeof nick);
 			break;
 		case 'k':
-			password = argv[++i];
+			if(++i < argc) password = argv[i];
-			break;
-		case 'f':
-			fullname = argv[++i];
 			break;
 		case 'v':
-			fputs("sic-"VERSION", (C)opyright MMVI Anselm R. Garbe\n", stdout);
+			eprint("sic-"VERSION", © 2005-2009 Kris Maglione, Anselm R. Garbe, Nico Golde\n");
-			exit(EXIT_SUCCESS);
+		default:
-			break;
+			eprint("usage: sic [-h host] [-p port] [-n nick] [-k keyword] [-v]\n");
 		}
 	}
-
 	/* init */
-	if((srv = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
+	i = dial(host, port);
-		fprintf(stderr, "sic: cannot connect server '%s'\n", server);
+	srv = fdopen(i, "r+");
-		exit(EXIT_FAILURE);
-	}
-	if (NULL == (hp = gethostbyname(server))) {
-		fprintf(stderr, "sic: cannot resolve hostname '%s'\n", server);
-		exit(EXIT_FAILURE);
-	}
-	addr.sin_family = AF_INET;
-	addr.sin_port = htons(port);
-	memcpy(&addr.sin_addr, hp->h_addr, hp->h_length);
-	if(connect(srv, (struct sockaddr *) &addr, sizeof(struct sockaddr_in))) {
-		close(srv);
-		fprintf(stderr, "sic: cannot connect server '%s'\n", server);
-		exit(EXIT_FAILURE);
-	}
-
 	/* login */
 	if(password)
-		snprintf(bufout, sizeof(bufout),
+		sout("PASS %s", password);
-				"PASS %s\r\nNICK %s\r\nUSER %s localhost %s :%s\r\n",
+	sout("NICK %s", nick);
-				password, nick, nick, server, fullname);
+	sout("USER %s localhost %s :%s", nick, host, nick);
-	else
+	fflush(srv);
-		snprintf(bufout, sizeof(bufout), "NICK %s\r\nUSER %s localhost %s :%s\r\n",
+	setbuf(stdout, NULL);
-				 nick, nick, server, fullname);
+	setbuf(srv, NULL);
-	write(srv, bufout, strlen(bufout));
+	for(;;) { /* main loop */
-
-	snprintf(ping, sizeof(ping), "PING %s\r\n", server);
-	channel[0] = 0;
-	setbuf(stdout, NULL); /* unbuffered stdout */
-	for(;;) {
 		FD_ZERO(&rd);
 		FD_SET(0, &rd);
-		FD_SET(srv, &rd);
+		FD_SET(fileno(srv), &rd);
 		tv.tv_sec = 120;
 		tv.tv_usec = 0;
-		i = select(srv + 1, &rd, 0, 0, &tv);
+		i = select(fileno(srv) + 1, &rd, 0, 0, &tv);
 		if(i < 0) {
 			if(errno == EINTR)
 				continue;
-			perror("sic: error on select()");
+			eprint("sic: error on select():");
-			exit(EXIT_FAILURE);
-		} else if(i == 0) {
-			if(time(NULL) - trespond >= PINGTIMEOUT) {
-				pout(server, "-!- sic shutting down: parseing timeout");
-				exit(EXIT_FAILURE);
 		}
-			write(srv, ping, strlen(ping));
+		else if(i == 0) {
+			if(time(NULL) - trespond >= 300)
+				eprint("sic shutting down: parse timeout\n");
+			sout("PING %s", host);
 			continue;
 		}
-		if(FD_ISSET(srv, &rd)) {
+		if(FD_ISSET(fileno(srv), &rd)) {
-			if(getline(srv, sizeof(bufin), bufin) == -1) {
+			if(fgets(bufin, sizeof bufin, srv) == NULL)
-				perror("sic: remote server closed connection");
+				eprint("sic: remote host closed connection\n");
-				exit(EXIT_FAILURE);
-			}
 			parsesrv(bufin);
 			trespond = time(NULL);
 		}
 		if(FD_ISSET(0, &rd)) {
-			if(getline(0, sizeof(bufin), bufin) == -1) {
+			if(fgets(bufin, sizeof bufin, stdin) == NULL)
-				perror("sic: broken pipe");
+				eprint("sic: broken pipe\n");
-				exit(EXIT_FAILURE);
-			}
 			parsein(bufin);
 		}
 	}
-
 	return 0;
 }

util.c

@@ -0,0 +1,74 @@
+/* See LICENSE file for license details. */
+#include <netdb.h>
+#include <netinet/in.h>
+#include <sys/socket.h>
+
+static void
+eprint(const char *fmt, ...) {
+	va_list ap;
+
+	va_start(ap, fmt);
+	vsnprintf(bufout, sizeof bufout, fmt, ap);
+	va_end(ap);
+	fprintf(stderr, "%s", bufout);
+	if(fmt[0] && fmt[strlen(fmt) - 1] == ':')
+		fprintf(stderr, " %s\n", strerror(errno));
+	exit(1);
+}
+
+static int
+dial(char *host, char *port) {
+	static struct addrinfo hints;
+	int srv;
+	struct addrinfo *res, *r;
+
+	memset(&hints, 0, sizeof hints);
+	hints.ai_family = AF_UNSPEC;
+	hints.ai_socktype = SOCK_STREAM;
+	if(getaddrinfo(host, port, &hints, &res) != 0)
+		eprint("error: cannot resolve hostname '%s':", host);
+	for(r = res; r; r = r->ai_next) {
+		if((srv = socket(r->ai_family, r->ai_socktype, r->ai_protocol)) == -1)
+			continue;
+		if(connect(srv, r->ai_addr, r->ai_addrlen) == 0)
+			break;
+		close(srv);
+	}
+	freeaddrinfo(res);
+	if(!r)
+		eprint("error: cannot connect to host '%s'\n", host);
+	return srv;
+}
+
+#define strlcpy _strlcpy
+static void
+strlcpy(char *to, const char *from, int l) {
+	memccpy(to, from, '\0', l);
+	to[l-1] = '\0';
+}
+
+static char *
+eat(char *s, int (*p)(int), int r) {
+	while(s != '\0' && p(*s) == r)
+		s++;
+	return s;
+}
+
+static char*
+skip(char *s, char c) {
+	while(*s != c && *s != '\0')
+		s++;
+	if(*s != '\0')
+		*s++ = '\0';
+	return s;
+}
+
+static void
+trim(char *s) {
+	char *e;
+
+	e = s + strlen(s) - 1;
+	while(isspace(*e) && e > s)
+		e--;
+	*(e + 1) = '\0';
+}