X-Git-Url: https://git.distorted.org.uk/~mdw/ircbot/blobdiff_plain/9bc33297992655112490af5bfb98298294f47f67..17bfe24c496a0f6fe1332fcfc374c9f2a941db9f:/bot.tcl

diff --git a/bot.tcl b/bot.tcl
index b5be32b..09c4ca2 100755
--- a/bot.tcl
+++ b/bot.tcl
@@ -2,33 +2,59 @@
 
 set host chiark
 set port 6667
-set nick Blight
+if {![info exists nick]} { set nick Blight }
+if {![info exists ownfullname]} { set ownfullname "here to Help" }
+set ownmailaddr blight@chiark.greenend.org.uk
 
-set sock [socket $host $port]
-fconfigure $sock -buffering line
-#fconfigure $sock -translation binary
-fconfigure $sock -translation crlf
+if {![info exists globalsecret]} {
+    set gsfile [open /dev/urandom r]
+    fconfigure $gsfile -translation binary
+    set globalsecret [read $gsfile 32]
+    binary scan $globalsecret H* globalsecret
+    close $gsfile
+    unset gsfile
+}
 
-proc sendout {prefix command args} {
+proc try_except_finally {try except finally} {
+    global errorInfo errorCode
+    set er [catch { uplevel 1 $try } emsg]
+    if {$er} {
+	set ei $errorInfo
+	set ec $errorCode
+	if {[catch { uplevel 1 $except } emsg3]} {
+	    append ei "\nALSO ERROR HANDLING ERROR:\n$emsg3"
+	}
+    }
+    set er2 [catch { uplevel 1 $finally } emsg2]
+    if {$er} {
+	if {$er2} {
+	    append ei "\nALSO ERROR CLEANING UP:\n$emsg2"
+	}
+	return -code $er -errorinfo $ei -errorcode $ec $emsg
+    } elseif {$er2} {
+	return -code $er2 -errorinfo $errorInfo -errorcode $errorCode $emsg2
+    } else {
+	return $emsg
+    }
+}
+
+proc sendout {command args} {
+    global sock
     if {[llength $args]} {
 	set la [lindex $args end]
 	set args [lreplace $args end end]
 	foreach i $args {
 	    if {[regexp {[: ]} $i]} {
-		error "bad argument in output $i ($prefix $command $args)"
+		error "bad argument in output $i ($command $args)"
 	    }
 	}
-	lappend $args :$la
+	lappend args :$la
     }
     set args [lreplace $args 0 -1 $command]
-    if {[string length $prefix]} {
-	set args [lreplace $args 
-    set string "$command"
-    puts $string
+    set string [join $args { }]
+    puts "[clock seconds] -> $string"
     puts $sock $string
 }
-puts $sock "USER guest 0 * :chiark testing bot"
-puts $sock "NICK $nick"
 
 proc log {data} {
     puts $data
@@ -36,26 +62,53 @@ proc log {data} {
 
 proc logerror {data} {
     log $data
-}	
+}
+
+proc saveeic {} {
+    global saveei saveec errorInfo errorCode
+
+    set saveei $errorInfo
+    set saveec $errorCode
+
+    puts ">$saveec|$saveei<"
+}
+
+proc bgerror {msg} {
+    global save
+    logerror $msg
+    saveeic
+}
 
 proc onread {args} {
-    global sock saveei saveec errorInfo errorCode
+    global sock nick calling_nick errorInfo errorCode
     
-    gets $sock line
-    regsub -all "\\[^ -\176\240-\376\\]" $line ? line
+    if {[gets $sock line] == -1} { set terminate 1; return }
+    regsub -all "\[^ -\176\240-\376\]" $line ? line
     set org $line
+    
+    set ei $errorInfo
+    set ec $errorCode
+    catch { unset calling_nick }
+    set errorInfo $ei
+    set errorCode $ec
+    
     if {[regexp -nocase {^:([^ ]+) (.*)} $line dummy prefix remain]} {
 	set line $remain
+	if {[regexp {^([^!]+)!} $prefix dummy maybenick]} {
+	    set calling_nick $maybenick
+	    if {"[irctolower $maybenick]" == "[irctolower $nick]"} return
+	}
     } else {
 	set prefix {}
     }
+    if {![string length $line]} { return }
     if {![regexp -nocase {^([0-9a-z]+) *(.*)} $line dummy command line]} {
 	log "bad command: $org"
 	return
     }
-    set command [string toupper command]
+    set command [string toupper $command]
     set params {}
-    while {[regexp {([^ :]+) *(.*)} $line dummy thisword line]} {
+    while {[regexp {^([^ :]+) *(.*)} $line dummy thisword line]} {
 	lappend params $thisword
     }
     if {[regexp {^:(.*)} $line dummy thisword]} {
@@ -64,27 +117,860 @@ proc onread {args} {
 	log "junk at end: $org"
 	return
     }
+    if {"$command" == "PRIVMSG" &&
+        [regexp {^[&#+!]} [lindex $params 0]] &&
+        ![regexp {^!} [lindex $params 1]]} {
+	# on-channel message, ignore
+	catch {
+	    recordlastseen_p $prefix "talking on [lindex $params 0]" 1
+	}
+	return
+    }
+    log "[clock seconds] <- $org"
     set procname msg_$command
+    if {[catch { info body $procname }]} { return }
     if {[catch {
 	eval [list $procname $prefix $command] $params
     } emsg]} {
 	logerror "error: $emsg ($prefix $command $params)"
-	if {![regexp {^invalid command name } $emsg]} {
-	    set saveei $errorInfo
-	    set saveec $errorCode
-	}
+	saveeic
     }
 }
 
-proc noprefix {} {
-    upvar 1 p
+proc sendprivmsg {dest l} {
+    sendout [expr {[ischan $dest] ? "PRIVMSG" : "NOTICE"}] $dest $l
+}
+proc sendaction {dest what} { sendout PRIVMSG $dest "\001ACTION $what\001" }
+proc msendprivmsg {dest ll} { foreach l $ll { sendprivmsg $dest $l } }
+proc msendprivmsg_delayed {delay dest ll} { after $delay [list msendprivmsg $dest $ll] }
+
+proc prefix_none {} {
+    upvar 1 p p
     if {[string length $p]} { error "prefix specified" }
+}
+
+proc msg_PING {p c s1} {
+    prefix_none
+    sendout PONG $s1
+}
+
+proc check_nick {n} {
+    if {[regexp -nocase {[^][\\`_^{|}a-z0-9-]} $n]} { error "bad char in nick" }
+    if {[regexp {^[-0-9]} $n]} { error "bad nick start" }
+}
+
+proc ischan {dest} {
+    return [regexp {^[&#+!]} $dest]
+}
+
+proc irctolower {v} {
+    foreach {from to} [list "\\\[" "{" \
+			  "\\\]" "}" \
+	                  "\\\\" "|" \
+			  "~"    "^"] {
+	regsub -all $from $v $to v
+    }
+    return [string tolower $v]
+}
+
+proc prefix_nick {} {
+    global nick
+    upvar 1 p p
+    upvar 1 n n
+    if {![regexp {^([^!]+)!} $p dummy n]} { error "not from nick" }
+    check_nick $n
+    if {"[irctolower $n]" == "[irctolower $nick]"} {
+	error "from myself" {} {}
+    }
+}
+
+proc showintervalsecs {howlong} {
+    return [showintervalsecs/[opt timeformat] $howlong]
+}
+
+proc showintervalsecs/ks {howlong} {
+    if {$howlong < 1000} {
+	return "${howlong}s"
+    } else {
+	if {$howlong < 1000000} {
+	    set pfx k
+	    set scale 1000
+	} else {
+	    set pfx M
+	    set scale 1000000
+	}
+	set value [expr "$howlong.0 / $scale"]
+	foreach {min format} {100 %.0f 10 %.1f 1 %.2f} {
+	    if {$value < $min} continue
+	    return [format "$format${pfx}s" $value]
+	}
+    }
+}
+
+proc format_qty {qty unit} {
+    set o $qty
+    append o " "
+    append o $unit
+    if {$qty != 1} { append o s }
+    return $o
+}
+
+proc showintervalsecs/hms {qty} {
+    set ul {second 60 minute 60 hour 24 day 7 week}
+    set remainv 0
+    while {[llength $ul] > 1 && $qty >= [set uv [lindex $ul 1]]} {
+	set remainu [lindex $ul 0]
+	set remainv [expr {$qty % $uv}]
+	set qty [expr {($qty-$remainv)/$uv}]
+	set ul [lreplace $ul 0 1]
+    }
+    set o [format_qty $qty [lindex $ul 0]]
+    if {$remainv} {
+	append o " "
+	append o [format_qty $remainv $remainu]
+    }
+    return $o
+}
+
+proc showinterval {howlong} {
+    if {$howlong <= 0} {
+	return {just now}
+    } else {
+	return "[showintervalsecs $howlong] ago"
+    }
+}
+
+proc showtime {when} {
+    return [showinterval [expr {[clock seconds] - $when}]]
+}
+
+proc def_msgproc {name argl body} {
+    proc msg_$name "varbase $argl" "\
+    upvar #0 msg/\$varbase/dest d\n\
+    upvar #0 msg/\$varbase/str s\n\
+    upvar #0 msg/\$varbase/accum a\n\
+$body"
+}
+
+def_msgproc begin {dest str} {
+    set d $dest
+    set s $str
+    set a {}
+}
+
+def_msgproc append {str} {
+    set ns "$s$str"
+    if {[string length $s] && [string length $ns] > 65} {
+	msg__sendout $varbase
+	set s " [string trimleft $str]"
+    } else {
+	set s $ns
+    }
+}
+
+def_msgproc finish {} {
+    msg__sendout $varbase
+    unset s
+    unset d
+    return $a
+}
+
+def_msgproc _sendout {} {
+    lappend a [string trimright $s]
+    set s {}
+}
+
+proc looking_whenwhere {when where} {
+    set str [showtime [expr {$when-1}]]
+    if {[string length $where]} { append str " on $where" }
+    return $str
+}
+
+proc recordlastseen_n {n how here} {
+    global lastseen lookedfor
+    set lastseen([irctolower $n]) [list $n [clock seconds] $how]
+    if {!$here} return
+    upvar #0 lookedfor([irctolower $n]) lf
+    if {[info exists lf]} {
+	switch -exact [llength $lf] {
+	    0 {
+		set ml {}
+	    }
+	    1 {
+		manyset [lindex $lf 0] when who where
+		set ml [list \
+ "FYI, $who was looking for you [looking_whenwhere $when $where]."]
+	    }
+	    default {
+		msg_begin tosend $n "FYI, people have been looking for you:"
+		set i 0
+		set fin ""
+		foreach e $lf {
+		    incr i
+		    if {$i == 1} {
+			msg_append tosend " "
+		    } elseif {$i == [llength $lf]} {
+			msg_append tosend " and "
+			set fin .
+		    } else {
+			msg_append tosend ", "
+		    }
+		    manyset $e when who where
+		    msg_append tosend \
+			    "$who ([looking_whenwhere $when $where])$fin"
+		}
+		set ml [msg_finish tosend]
+	    }
+	}
+	unset lf
+	msendprivmsg_delayed 1000 $n $ml
+    }
+}
+		
+proc recordlastseen_p {p how here} {
+    prefix_nick
+    recordlastseen_n $n $how $here
+}
+
+proc chanmode_arg {} {
+    upvar 2 args cm_args
+    set rv [lindex $cm_args 0]
+    set cm_args [lreplace cm_args 0 0]
+    return $rv
+}
+
+proc chanmode_o1 {m g p chan} {
+    global nick
+    prefix_nick
+    set who [chanmode_arg]
+    recordlastseen_n $n "being nice to $who" 1
+    if {"[irctolower $who]" == "[irctolower $nick]"} {
+	sendprivmsg $n Thanks.
+    }
+}
+
+proc chanmode_o0 {m g p chan} {
+    global nick chandeop
+    prefix_nick
+    set who [chanmode_arg]
+    recordlastseen_p $p "being mean to $who" 1
+    if {"[irctolower $who]" == "[irctolower $nick]"} {
+	set chandeop($chan) [list [clock seconds] $p]
+    }
+}
+
+proc msg_MODE {p c dest modelist args} {
+    if {![ischan $dest]} return
+    if {[regexp {^\-(.+)$} $modelist dummy modelist]} {
+	set give 0
+    } elseif {[regexp {^\+(.+)$} $modelist dummy modelist]} {
+	set give 1
+    } else {
+	error "invalid modelist"
+    }
+    foreach m [split $modelist] {
+	set procname chanmode_$m$give
+	if {[catch { info body $procname }]} {
+	    recordlastseen_p $p "fiddling with $dest" 1
+	} else {
+	    $procname $m $give  $p $dest
+	}
+    }
+}
+
+proc channel_noone_seen {chan} {
+    global nick_onchans
+    foreach n [array names nick_onchans] {
+	upvar #0 nick_onchans($n) oc
+	set oc [grep tc {"$tc" != "$chan"} $oc]
+    }
+}
+
+proc process_kickpart {chan user} {
+    global nick
+    check_nick $user
+    if {![ischan $chan]} { error "not a channel" }
+    if {"[irctolower $user]" == "[irctolower $nick]"} {
+	channel_noone_seen $chan
+    }
+    upvar #0 nick_onchans($user) oc
+    set lc [irctolower $chan]
+    set oc [grep tc {"$tc" != "$lc"} $oc]
+    if {![llength $oc]} { nick_forget $user }
+    nick_case $user
+}    
+
+proc msg_KICK {p c chans users comment} {
+    set chans [split $chans ,]
+    set users [split $users ,]
+    if {[llength $chans] > 1} {
+	foreach chan $chans user $users { process_kickpart $chan $user }
+    } else {
+	foreach user $users { process_kickpart [lindex $chans 0] $user }
+    }
+}
+
+proc msg_KILL {p c user why} {
+    nick_forget $user
+}
+
+set nick_arys {onchans username}
+
+proc nick_forget {n} {
+    global nick_arys
+    foreach ary $nick_arys {
+	upvar #0 nick_${ary}($n) av
+	catch { unset av }
+    }
+    nick_case $n
+}
+
+proc nick_case {n} {
+    global nick_case
+    set nick_case([irctolower $n]) $n
+}
+
+proc msg_NICK {p c newnick} {
+    global nick_arys nick_case
+    prefix_nick
+    recordlastseen_n $n "changing nicks to $newnick" 0
+    recordlastseen_n $newnick "changing nicks from $n" 1
+    foreach ary $nick_arys {
+	upvar #0 nick_${ary}($n) old
+	upvar #0 nick_${ary}($newnick) new
+	if {[info exists new]} { error "nick collision ?! $ary $n $newnick" }
+	if {[info exists old]} { set new $old; unset old }
+    }
+    nick_case $newnick
+}
+
+proc msg_JOIN {p c chan} {
+    prefix_nick
+    recordlastseen_n $n "joining $chan" 1
+    upvar #0 nick_onchans($n) oc
+    lappend oc [irctolower $chan]
+    nick_case $n
+}
+proc msg_PART {p c chan} {
+    prefix_nick
+    recordlastseen_n $n "leaving $chan" 1
+    process_kickpart $chan $n
+}
+proc msg_QUIT {p c why} {
+    prefix_nick
+    recordlastseen_n $n "leaving ($why)" 0
+    nick_forget $n
+}
+
+proc msg_PRIVMSG {p c dest text} {
+    prefix_nick
+    if {[ischan $dest]} {
+	recordlastseen_n $n "invoking me in $dest" 1
+	set output $dest
+    } else {
+	recordlastseen_n $n "talking to me" 1
+	set output $n
+    }
+    nick_case $n
+
+    if {[catch {
+	regsub {^! *} $text {} text
+	set ucmd [ta_word]
+	set procname ucmd/[string tolower $ucmd]
+	if {[catch { info body $procname }]} {
+	    error "unknown command; try help for help"
+	}
+	$procname $p $dest
+    } rv]} {
+	sendprivmsg $n "error: $rv"
+    } else {
+	manyset $rv priv_msgs pub_msgs priv_acts pub_acts
+	foreach {td val} [list $n $priv_acts $output $pub_acts] {
+	    foreach l [split $val "\n"] {
+		sendaction $td $l
+	    }
+	}
+	foreach {td val} [list $n $priv_msgs $output $pub_msgs] {
+	    foreach l [split $val "\n"] {
+		sendprivmsg $td $l
+	    }
+	}
+    }
+}
+
+proc msg_INVITE {p c n chan} {
+    after 1000 [list sendout JOIN $chan]
+}
+
+proc grep {var predicate list} {
+    set o {}
+    upvar 1 $var v
+    foreach v $list {
+	if {[uplevel 1 [list expr $predicate]]} { lappend o $v }
+    }
+    return $o
+}
+
+proc msg_353 {p c dest type chan nicklist} {
+    global names_chans nick_onchans
+    if {![info exists names_chans]} { set names_chans {} }
+    set chan [irctolower $chan]
+    lappend names_chans $chan
+    channel_noone_seen $chan
+    foreach n [split $nicklist { }] {
+	regsub {^[@+]} $n {} n
+	if {![string length $n]} continue
+	check_nick $n
+	upvar #0 nick_onchans($n) oc
+	lappend oc $chan
+	nick_case $n
+    }
+}
+
+proc msg_366 {p c args} {
+    global names_chans nick_onchans
+    if {[llength names_chans] > 1} {
+	foreach n [array names nick_onchans] {
+	    upvar #0 nick_onchans($n) oc
+	    set oc [grep tc {[lsearch -exact $tc $names_chans] >= 0} $oc]
+	    if {![llength $oc]} { nick_forget $n }
+	}
+    }
+    unset names_chans
+}
+
+proc ta_anymore {} {
+    upvar 1 text text
+    return [expr {!![string length $text]}]
+}
+
+proc ta_nomore {} {
+    upvar 1 text text
+    if {[string length $text]} { error "too many parameters" }
+}
+
+proc ta_word {} {
+    upvar 1 text text
+    if {![regexp {^([^ 	]+) *(.*)} $text dummy firstword text]} {
+	error "too few parameters"
+    }
+    return $firstword
+}
+
+proc ta_nick {} {
+    upvar 1 text text
+    set v [ta_word]
+    check_nick $v
+    return $v
+}
+
+proc def_ucmd {cmdname body} {
+    proc ucmd/$cmdname {p dest} "    upvar 1 text text\n$body"
+}
+
+proc ucmdr {priv pub args} {
+    return -code return [concat [list $priv $pub] $args]
+}
+
+proc loadhelp {} {
+    global help_topics
+
+    catch { unset help_topics }
+    set f [open helpinfos r]
+    try_except_finally {
+	set lno 0
+	while {[gets $f l] >= 0} {
+	    incr lno
+	    if {[regexp {^#.*} $l]} {
+	    } elseif {[regexp {^ *$} $l]} {
+		if {[info exists topic]} {
+		    set help_topics($topic) [join $lines "\n"]
+		    unset topic
+		    unset lines
+		}
+	    } elseif {[regexp {^!([-+._0-9a-z]*)$} $l dummy newtopic]} {
+		if {[info exists topic]} {
+		    error "help $newtopic while in $topic"
+		}
+		set topic $newtopic
+		set lines {}
+	    } elseif {[regexp {^[^!#]} $l]} {
+		set topic
+		lappend lines [string trimright $l]
+	    } else {
+		error "eh ? $lno: $l"
+	    }
+	}
+	if {[info exists topic]} { error "unfinished topic $topic" }
+    } {} {
+	close $f
+    }
+}
+
+def_ucmd help {
+    upvar #0 help_topics([irctolower [string trim $text]]) info
+    if {![info exists info]} { ucmdr "No help on $text, sorry." {} }
+    ucmdr $info {}
+}
+
+def_ucmd ? {
+    global help_topics
+    ucmdr $help_topics() {}
+}
+
+proc manyset {list args} {
+    foreach val $list var $args {
+	upvar 1 $var my
+	set my $val
+    }
+}
+
+proc check_username {target} {
+    if {
+	[string length $target] > 8 ||
+        [regexp {[^-0-9a-z]} $target] ||
+        ![regexp {^[a-z]} $target]
+    } { error "invalid username" }
+}
+
+proc nickdb__head {} {
+    uplevel 1 {
+	set nl [irctolower $n]
+	upvar #0 nickdb($nl) ndbe
+	binary scan $nl H* nh
+	set nfn users/n$nh
+	if {![info exists ndbe] && [file exists $nfn]} {
+	    set f [open $nfn r]
+	    try_except_finally { set newval [read $f] } {} { close $f }
+	    if {[llength $newval] % 2} { error "invalid length" }
+	    set ndbe $newval
+	}
+    }
+}
+
+proc def_nickdb {name arglist body} {
+    proc nickdb_$name $arglist "nickdb__head; $body"
+}
+
+def_nickdb exists {n} {
+    return [info exists ndbe]
+}
+
+def_nickdb delete {n} {
+    catch { unset ndbe }
+    file delete $nfn
+}
+
+set default_settings {timeformat ks}
+
+def_nickdb set {n args} {
+    global default_settings
+    if {![info exists ndbe]} { set ndbe $default_settings }
+    foreach {key value} [concat $ndbe $args] { set a($key) $value }
+    set newval {}
+    foreach {key value} [array get a] { lappend newval $key $value }
+    set f [open $nfn.new w]
+    try_except_finally {
+	puts $f $newval
+	close $f
+	file rename -force $nfn.new $nfn
+    } {
+    } {
+	catch { close $f }
+    }
+    set ndbe $newval
+}
+
+proc opt {key} {
+    global calling_nick
+    if {[info exists calling_nick]} { set n $calling_nick } { set n {} }
+    return [nickdb_opt $n $key]
+}
+
+def_nickdb opt {n key} {
+    global default_settings
+    if {[info exists ndbe]} {
+	set l $ndbe
+    } else {
+	set l $default_settings
+    }
+    foreach {tkey value} $l {
+	if {"$tkey" == "$key"} { return $value }
+    }
+    error "unset setting $key"
+}
+
+proc check_notonchan {} {
+    upvar 1 dest dest
+    if {[ischan $dest]} { error "that command must be sent privately" }
+}
+
+proc nick_securitycheck {strict} {
+    upvar 1 n n
+    if {![nickdb_exists $n]} { error "you are unknown to me, use `register'." }
+    set wantu [nickdb_opt $n username]
+    if {![string length $wantu]} {
+	if {$strict} {
+	    error "that feature is only available to secure users, sorry."
+	} else {
+	    return
+	}
+    }
+    upvar #0 nick_username($n) nu
+    if {![info exists nu]} {
+	error "nick $n is secure, you must identify yourself first."
+    }
+    if {"$wantu" != "$nu"} {
+	error "you are the wrong user - the nick $n belongs to $wantu, not $nu"
+    }
+}
+
+def_ucmd who {
+    if {[ta_anymore]} {
+	set target [ta_word]; ta_nomore
+	set myself 1
+    } else {
+	prefix_nick
+	set target $n
+	set myself [expr {"$target" != "$n"}]
+    }
+    upvar #0 nick_case([irctolower $target]) nc
+    set nshow $target
+    if {[info exists nc]} {
+	upvar #0 nick_onchans($nc) oc
+	upvar #0 nick_username($nc) nu
+	if {[info exists oc]} { set nshow $nc }
+    }
+    if {![nickdb_exists $target]} {
+	set ol "$nshow is not a registered nick."
+    } elseif {[string length [set username [nickdb_opt $target username]]]} {
+	set ol "The nick $nshow belongs to the user $username."
+    } else {
+	set ol "The nick $nshow is registered (but not to a username)."
+    }
+    if {![info exists nc] || ![info exists oc]} {
+	if {$myself} {
+	    append ol "\nI can't see $nshow on anywhere."
+	} else {
+	    append ol "\nYou aren't on any channels with me."
+	}
+    } elseif {![info exists nu]} {
+	append ol "\n$nshow has not identified themselves."
+    } elseif {![info exists username]} {
+	append ol "\n$nshow has identified themselves as the user $nu."
+    } elseif {"$nu" != "$username"} {
+	append ol "\nHowever, $nshow is being used by the user $nu."
+    } else {
+	append ol "\n$nshow has identified themselves to me."
+    }
+    ucmdr {} $ol
+}
+
+def_ucmd register {
+    prefix_nick
+    check_notonchan
+    set old [nickdb_exists $n]
+    if {$old} { nick_securitycheck 0 }
+    switch -exact [string tolower [string trim $text]] {
+	{} {
+	    upvar #0 nick_username($n) nu
+	    if {![info exists nu]} {
+		ucmdr {} \
+ "You must identify yourself before using `register'.  See `help identify', or use `register insecure'."
+	    }
+	    nickdb_set $n username $nu
+	    ucmdr {} {} "makes a note of your username." {}
+	}
+	delete {
+	    nickdb_delete $n
+	    ucmdr {} {} "forgets your nickname." {}
+	}
+	insecure {
+	    nickdb_set $n username {}
+	    if {$old} {
+		ucmdr {} "Security is now disabled for your nickname !"
+	    } else {
+		ucmdr {} "This is fine, but bear in mind that people will be able to mess with your settings.  Channel management features need a secure registration." "makes an insecure registration for your nick."
+	    }
+	}
+    }
+}
+
+proc timeformat_desc {tf} {
+    switch -exact $tf {
+	ks { return "Times will be displayed in seconds or kiloseconds." }
+	hms { return "Times will be displayed in hours, minutes, etc." }
+	default { error "invalid timeformat: $v" }
+    }
+}
+
+proc def_setting {opt show_body set_body} {
+    proc set_show/$opt {} "
+        upvar 1 n n
+        set opt $opt
+        $show_body"
+    if {![string length $set_body]} return
+    proc set_set/$opt {} "
+        upvar 1 n n
+        upvar 1 text text
+        set opt $opt
+        $set_body"
+}
+
+def_setting timeformat {
+    set tf [nickdb_opt $n timeformat]
+    return "$tf: [timeformat_desc $tf]"
+} {
+    set tf [string tolower [ta_word]]
+    ta_nomore
+    set desc [timeformat_desc $tf]
+    nickdb_set $n timeformat $tf
+    ucmdr {} $desc
+}
+
+def_setting security {
+    set s [nickdb_opt $n username]
+    if {[string length $s]} {
+	return "Your nick, $n, is controlled by the user $s."
+    } else {
+	return "Your nick, $n, is not secure."
+    }
+} {}
+
+def_ucmd set {
+    prefix_nick
+    check_notonchan
+    if {![nickdb_exists $n]} {
+	ucmdr {} "You are unknown to me and so have no settings.  (Use `register'.)"
+    }
+    if {![ta_anymore]} {
+	set ol {}
+	foreach proc [lsort [info procs]] {
+	    if {![regexp {^set_show/(.*)$} $proc dummy opt]} continue
+	    lappend ol [format "%-10s %s" $opt [set_show/$opt]]
+	}
+	ucmdr {} [join $ol "\n"]
+    } else {
+	set opt [ta_word]
+	if {[catch { info body set_show/$opt }]} {
+	    error "no setting $opt"
+	}
+	if {![ta_anymore]} {
+	    ucmdr {} "$opt [set_show/$opt]"
+	} else {
+	    nick_securitycheck 0
+	    if {[catch { info body set_set/$opt }]} {
+		error "setting $opt cannot be set with `set'"
+	    }
+	    set_set/$opt
+	}
+    }
+}
+
+def_ucmd identpass {
+    set username [ta_word]
+    set passmd5 [md5sum "[ta_word]\n"]
+    ta_nomore
+    prefix_nick
+    check_notonchan
+    upvar #0 nick_onchans($n) onchans
+    if {![info exists onchans] || ![llength $onchans]} {
+	ucmdr "You must be on a channel with me to identify yourself." {}
+    }
+    check_username $username
+    exec userv --timeout 3 $username << "$passmd5\n" > /dev/null \
+	    irc-identpass $n
+    upvar #0 nick_username($n) rec_username
+    set rec_username $username
+    ucmdr "Pleased to see you, $username." {}
+}
+
+def_ucmd summon {
+    set target [ta_word]
+    ta_nomore
+    check_username $target
+    prefix_nick
+
+    upvar #0 lastsummon($target) ls
+    set now [clock seconds]
+    if {[info exists ls]} {
+	set interval [expr {$now - $ls}]
+	if {$interval < 30} {
+	    ucmdr {} \
+ "Please be patient; $target was summoned only [showinterval $interval]."
+	}
+    }
+    regsub {^[^!]*!} $p {} path
+    if {[catch {
+	exec userv --timeout 3 $target irc-summon $n $path \
+		[expr {[ischan $dest] ? "$dest" : ""}] \
+		< /dev/null
+    } rv]} {
+	regsub -all "\n" $rv { / } rv
+	error $rv
+    }
+    if {[regexp {^problem (.*)} $rv dummy problem]} {
+	ucmdr {} "The user `$target' $problem."
+    } elseif {[regexp {^ok ([^ ]+) ([0-9]+)$} $rv dummy tty idlesince]} {
+	set idletime [expr {$now - $idlesince}]
+	set ls $now
+	ucmdr {} {} {} "invites $target ($tty[expr {
+	    $idletime > 10 ? ", idle for [showintervalsecs $idletime]" : ""
+	}]) to [expr {
+	    [ischan $dest] ? "join us here" : "talk to you"
+	}]."
+    } else {
+	error "unexpected response from userv service: $rv"
+    }
+}
+
+proc md5sum {value} { exec md5sum << $value }
+
+def_ucmd seen {
+    global lastseen nick
+    prefix_nick
+    set ncase [ta_nick]
+    set nlower [irctolower $ncase]
+    ta_nomore
+    set now [clock seconds]
+    if {"$nlower" == "[irctolower $nick]"} {
+	error "I am not self-aware."
+    } elseif {![info exists lastseen($nlower)]} {
+	set rstr "I've never seen $ncase."
+    } else {
+	manyset $lastseen($nlower) realnick time what
+	set howlong [expr {$now - $time}]
+	set string [showinterval $howlong]
+	set rstr "I last saw $realnick $string, $what."
+    }
+    if {[ischan $dest]} {
+	set where $dest
+    } else {
+	set where {}
+    }
+    upvar #0 lookedfor($nlower) lf
+    if {[info exists lf]} { set oldvalue $lf } else { set oldvalue {} }
+    set lf [list [list $now $n $where]]
+    foreach v $oldvalue {
+	if {"[irctolower [lindex $v 1]]" == "[irctolower $n]"} continue
+	lappend lf $v
+    }
+    ucmdr {} $rstr
+}
+
+if {![info exists sock]} {
+    set sock [socket $host $port]
+    fconfigure $sock -buffering line
+    #fconfigure $sock -translation binary
+    fconfigure $sock -translation crlf
 
-proc msg_PING {p s1} {
-    noprefix
-    puts "PONG $s1"
+    sendout USER blight 0 * $ownfullname
+    sendout NICK $nick
+    fileevent $sock readable onread
 }
 
-fileevent $sock readable onread
+loadhelp
 
-vwait terminate
+#if {![regexp {tclsh} $argv0]} {
+#    vwait terminate
+#}