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.Dd January 10, 2021
.Dt CATGIRL 1
.Os
.
.Sh NAME
.Nm catgirl
.Nd IRC client
.
.Sh SYNOPSIS
.Nm
.Op Fl Relv
.Op Fl C Ar copy
.Op Fl H Ar hash
.Op Fl N Ar notify
.Op Fl O Ar open
.Op Fl S Ar bind
.Op Fl a Ar plain
.Op Fl c Ar cert
.Op Fl h Ar host
.Op Fl i Ar ignore
.Op Fl j Ar join
.Op Fl k Ar priv
.Op Fl n Ar nick
.Op Fl p Ar port
.Op Fl r Ar real
.Op Fl s Ar save
.Op Fl t Ar trust
.Op Fl u Ar user
.Op Fl w Ar pass
.Op Ar config ...
.
.Nm
.Op Fl S Ar bind
.Op Fl h Ar host
.Op Fl p Ar port
.Fl o Ar chain
.Op Ar config ...
.
.Nm
.Fl g Ar cert
.
.Sh DESCRIPTION
The
.Nm
program is a TLS-only
curses IRC client.
.
.Pp
See
.Sx EXAMPLES
to get started.
Type
.Ic /help
inside
.Nm
to view this manual again.
.
.Pp
Options can be loaded from files
listed on the command line.
Files are searched for in
.Pa $XDG_CONFIG_DIRS/catgirl
unless the path starts with
.Ql /
or
.Ql \&. .
Each option is placed on a line,
and lines beginning with
.Ql #
are ignored.
The options are listed below
following their corresponding flags.
.
.Pp
The arguments are as follows:
.Bl -tag -width Ds
.It Fl C Ar util , Cm copy = Ar util
Set the utility used by
.Ic /copy .
Use more than once to add arguments to
.Ar util .
The default is the first available of
.Xr pbcopy 1 ,
.Xr wl-copy 1 ,
.Xr xclip 1 ,
.Xr xsel 1 .
.
.It Fl H Ar init,bound , Cm hash = Ar init,bound
Set the initial value of
the nick color hash function
and the maximum IRC color value used.
The default is 0,75.
To use only colors from
the 16-color terminal set,
use 0,15.
.
.It Fl N Ar util , Cm notify = Ar util
Send notifications using a utility.
Use more than once to add arguments to
.Ar util .
Two additional arguments are passed to
.Ar util :
a title and a description,
appropriate for
.Xr notify-send 1 .
.
.It Fl O Ar util , Cm open = Ar util
Set the utility used by
.Ic /open .
Use more than once to add arguments to
.Ar util .
The default is the first available of
.Xr open 1 ,
.Xr xdg-open 1 .
.
.It Fl R , Cm restrict
Disable the
.Ic /copy ,
.Ic /debug ,
.Ic /exec ,
.Ic /join ,
.Ic /msg ,
.Ic /open ,
.Ic /query ,
.Ic /quote
commands.
.
.It Fl S Ar host , Cm bind = Ar host
Bind to source address
.Ar host
when connecting to the server.
.
.It Fl a Ar user : Ns Ar pass , Cm sasl-plain = Ar user : Ns Ar pass
Authenticate as
.Ar user
with
.Ar pass
using SASL PLAIN.
Since this requires the account password
in plain text,
it is recommended to use SASL EXTERNAL instead with
.Fl e .
.
.It Fl c Ar path , Cm cert = Ar path
Load the TLS client certificate from
.Ar path .
The
.Ar path
is searched for in the same manner
as configuration files.
If the private key is in a separate file,
it is loaded with
.Fl k .
With
.Fl e ,
authenticate using SASL EXTERNAL.
Certificates can be generated with
.Fl g .
.
.It Fl e , Cm sasl-external
Authenticate using SASL EXTERNAL,
also known as CertFP.
The TLS client certificate is loaded with
.Fl c .
For more information, see
.Sx Configuring CertFP .
.
.It Fl g Ar path
Generate a TLS client certificate using
.Xr openssl 1
and write it to
.Ar path .
.
.It Fl h Ar host , Cm host = Ar host
Connect to
.Ar host .
.
.It Fl i Ar pattern , Cm ignore = Ar pattern
Add a case-insensitive message filtering pattern,
which may contain
.Ql * ,
.Ql \&?
and
.Ql []
wildcards as in
.Xr sh 1 .
The format of the pattern is as follows:
.Bd -ragged -offset indent
.Ar nick Ns Oo Ar !user@host
.Oo Ar command
.Oo Ar channel
.Oo Ar message
.Oc Oc Oc Oc
.Ed
.Pp
The commands which can be filtered are:
.Sy INVITE ,
.Sy JOIN ,
.Sy NICK ,
.Sy NOTICE ,
.Sy PART ,
.Sy PRIVMSG ,
.Sy QUIT ,
.Sy SETNAME .
.
.It Fl j Ar join , Cm join = Ar join
Join the comma-separated list of channels
.Ar join .
.
.It Fl k Ar path , Cm priv = Ar priv
Load the TLS client private key from
.Ar path .
The
.Ar path
is searched for in the same manner
as configuration files.
.
.It Fl l , Cm log
Log chat events to files in paths
.Pa $XDG_DATA_HOME/catgirl/log/network/channel/YYYY-MM-DD.log .
.
.It Fl n Ar nick , Cm nick = Ar nick
Set nickname to
.Ar nick .
The default nickname is the user's name.
.
.It Fl o Ar chain
Write the server certificate chain
in PEM format to
.Ar chain
and exit.
.
.It Fl p Ar port , Cm port = Ar port
Connect to
.Ar port .
The default port is 6697.
.
.It Fl r Ar real , Cm real = Ar real
Set realname to
.Ar real .
The default realname is the same as the nickname.
.
.It Fl s Ar name , Cm save = Ar name
Load and save the contents of windows from
.Ar name
in
.Pa $XDG_DATA_DIRS/catgirl ,
or an absolute or relative path if
.Ar name
starts with
.Ql /
or
.Ql \&. .
.
.It Fl t Ar path , Cm trust = Ar path
Trust the certificate loaded from
.Ar path .
Server name verification is disabled.
The
.Ar path
is searched for in the same manner
as configuration files.
See
.Sx Connecting to Servers with Self-signed Certificates .
.
.It Fl u Ar user , Cm user = Ar user
Set username to
.Ar user .
The default username is the same as the nickname.
.
.It Fl v , Cm debug
Log raw IRC messages to the
.Sy <debug>
window
as well as standard error
if it is not a terminal.
.
.It Fl w Ar pass , Cm pass = Ar pass
Log in with the server password
.Ar pass .
.El
.
.Ss Configuring CertFP
.Bl -enum
.It
Generate a new TLS client certificate:
.Bd -literal -offset indent
catgirl -g ~/.config/catgirl/example.pem
.Ed
.It
Connect to the server using the certificate:
.Bd -literal -offset indent
cert = example.pem
# or: catgirl -c example.pem
.Ed
.It
Identify with services or use
.Cm sasl-plain ,
then add the certificate fingerprint
to your account:
.Bd -literal -offset indent
/msg NickServ CERT ADD
.Ed
.It
Enable SASL EXTERNAL
to require successful authentication
when connecting:
.Bd -literal -offset indent
cert = example.pem
sasl-external
# or: catgirl -e -c example.pem
.Ed
.El
.
.Ss Connecting to Servers with Self-signed Certificates
.Bl -enum
.It
Connect to the server
and write its certificate to a file:
.Bd -literal -offset indent
catgirl -h irc.example.org -o ~/.config/catgirl/example.pem
.Ed
.It
Configure
.Nm
to trust the certificate:
.Bd -literal -offset indent
trust = example.pem
# or: catgirl -t example.pem
.Ed
.El
.
.Sh COMMANDS
Any unique prefix can be used to abbreviate a command.
For example,
.Ic /join
can be typed
.Ic /j .
.
.Ss Chat Commands
.Bl -tag -width Ds
.It Ic /away Op Ar message
Set or clear your away status.
.It Ic /cs Ar command
Send a command to ChanServ.
.It Ic /invite Ar nick
Invite a user to the channel.
.It Ic /join Ar channel
Join a channel.
.It Ic /list Op Ar channel
List channels.
.It Ic /me Op Ar action
Send an action message.
.It Ic /msg Ar nick message
Send a private message.
.It Ic /names
List users in the channel.
.It Ic /nick Ar nick
Change nicknames.
.It Ic /notice Ar message
Send a notice.
.It Ic /ns Ar command
Send a command to NickServ.
.It Ic /ops
List channel operators.
.It Ic /part Op Ar message
Leave the channel.
.It Ic /query Ar nick
Start a private conversation.
.It Ic /quit Op Ar message
Quit IRC.
.It Ic /quote Ar command
Send a raw IRC command.
The
.Ic /debug
command is likely needed
for command output.
.It Ic /say Ar message
Send a regular message.
.It Ic /setname Ar name
Update realname
if supported by the server.
.It Ic /topic Op Ar topic
Show or set the topic of the channel.
Press
.Ic Tab
twice to copy the current topic.
.It Ic /whois Ar nick
Query information about a user.
.It Ic /whowas Ar nick
Query past information about a user.
.El
.
.Ss UI Commands
.Bl -tag -width Ds
.It Ic /close Op Ar name | num
Close the named, numbered or current window.
.It Ic /copy Op Ar nick | substring
Copy the most recent URL from
.Ar nick
or matching
.Ar substring .
.It Ic /debug
Toggle logging in the
.Sy <debug>
window.
.It Ic /exec Ar command
Run
.Ar command
with
.Ev SHELL
and interpret its output
as input to the current window,
including as commands.
.It Ic /help
View this manual.
Type
.Ic q
to return to
.Nm .
.It Ic /help Ar topic
List the server help for a topic.
Try
.Ic /help index
for a list of topics.
.It Ic /ignore Op Ar pattern
List message filtering patterns
or temporarily add a pattern.
To permanently add a pattern, use
.Fl i .
.It Ic /move Oo Ar name Oc Ar num
Move named window to number.
.It Ic /open Op Ar count
Open each of
.Ar count
most recent URLs.
.It Ic /open Ar nick | substring
Open the most recent URL from
.Ar nick
or matching
.Ar substring .
.It Ic /unignore Ar pattern
Temporarily remove a message filtering pattern.
.It Ic /window Ar name
Switch to window by name.
.It Ic /window Ar num , Ic / Ns Ar num
Switch to window by number.
.El
.
.Ss Operator Commands
.Bl -tag -width Ds
.It Ic /ban Op Ar mask ...
List or ban masks from the channel.
.It Ic /deop Op Ar nick ...
Revoke channel operator status from users or yourself.
.It Ic /devoice Op Ar nick ...
Revoke voice from users or yourself in the channel.
.It Ic /except Op Ar mask ...
List or add masks to the channel ban exception list.
.It Ic /invex Op Ar mask ...
List or add masks to the channel invite list.
.It Ic /kick Ar nick Op Ar message
Kick a user from the channel.
.It Ic /mode Oo Ar modes Oc Op Ar param ...
Show or set channel modes.
In the
.Sy <network>
window,
show or set user modes.
.It Ic /op Op Ar nick ...
Grant users or yourself channel operator status.
.It Ic /unban Ar mask ...
Unban masks from the channel.
.It Ic /unexcept Ar mask ...
Remove masks from the channel ban exception list.
.It Ic /uninvex Ar mask ...
Remove masks from the channel invite list.
.It Ic /voice Op Ar nick ...
Grant users or yourself voice in the channel.
.El
.
.Sh KEY BINDINGS
The
.Nm
interface provides
.Xr emacs 1 Ns -like
line editing
as well as keys for IRC formatting.
The prefixes
.Ic C-
and
.Ic M-
represent the control and meta (alt)
modifiers, respectively.
.
.Ss Line Editing
.Bl -tag -width Ds -compact
.It Ic C-a
Move to beginning of line.
.It Ic C-b
Move left.
.It Ic C-d
Delete next character.
.It Ic C-e
Move to end of line.
.It Ic C-f
Move right.
.It Ic C-k
Delete to end of line.
.It Ic C-t
Transpose characters.
.It Ic C-u
Delete to beginning of line.
.It Ic C-w
Delete previous word.
.It Ic C-x
Expand a text macro beginning with
.Ql \e .
.It Ic C-y
Paste previously deleted text.
.It Ic M-Enter
Insert a newline without sending a command.
.It Ic M-b
Move to previous word.
.It Ic M-d
Delete next word.
.It Ic M-f
Move to next word.
.It Ic M-q
Collapse all whitespace.
.It Ic Tab
Complete nick, channel, command or macro.
.El
.
.Ss Window Keys
.Bl -tag -width Ds -compact
.It Ic C-l
Redraw the UI.
.It Ic C-n
Switch to next window.
.It Ic C-p
Switch to previous window.
.It Ic C-r
Scroll to previous line matching input.
.It Ic C-s
Scroll to next line matching input.
.It Ic C-v
Scroll down a page.
.It Ic M--
Toggle visibility of filtered messages.
.It Ic M-=
Toggle mute.
Muted windows do not appear in the status line
unless you are mentioned.
.It Ic M-/
Switch to previously selected window.
.It Ic M-<
Scroll to top.
.It Ic M->
Scroll to bottom.
.It Ic M- Ns Ar n
Switch to window by number 0\(en9.
.It Ic M-a
Cycle through unread windows.
.It Ic M-l
List the contents of the window
without word-wrapping.
Press
.Ic Enter
to return to
.Nm .
.It Ic M-m
Insert a blank line in the window.
.It Ic M-n
Scroll to next highlight.
.It Ic M-p
Scroll to previous highlight.
.It Ic M-u
Scroll to first unread line.
.It Ic M-v
Scroll up a page.
.El
.
.Ss IRC Formatting
.Bl -tag -width Ds -compact
.It Ic C-z b
Toggle bold.
.It Ic C-z c
Set or reset color.
.It Ic C-z i
Toggle italics.
.It Ic C-z o
Reset formatting.
.It Ic C-z r
Toggle reverse color.
.It Ic C-z u
Toggle underline.
.El
.
.Pp
To set colors, follow
.Ic C-z c
by one or two digits for the foreground color,
optionally followed by a comma
and one or two digits for the background color.
To reset color, follow
.Ic C-z c
by a non-digit.
.
.Pp
The color numbers are as follows:
.Bl -column "99" "orange (dark yellow)" "15" "pink (light magenta)"
.It \ 0 Ta white Ta \ 8 Ta yellow
.It \ 1 Ta black Ta \ 9 Ta light green
.It \ 2 Ta blue Ta 10 Ta cyan
.It \ 3 Ta green Ta 11 Ta light cyan
.It \ 4 Ta red Ta 12 Ta light blue
.It \ 5 Ta brown (dark red) Ta 13 Ta pink (light magenta)
.It \ 6 Ta magenta Ta 14 Ta gray
.It \ 7 Ta orange (dark yellow) Ta 15 Ta light gray
.It 99 Ta default Ta Ta
.El
.
.Sh ENVIRONMENT
.Bl -tag -width Ds
.It Ev SHELL
The path executed by
.Ic /exec
with
.Fl c Ar command .
If unset,
.Pa /bin/sh
is used.
.It Ev USER
The default nickname.
.El
.
.Sh FILES
.Bl -tag -width Ds
.It Pa $XDG_CONFIG_DIRS/catgirl
Configuration files are searched for first in
.Ev $XDG_CONFIG_HOME ,
usually
.Pa ~/.config ,
followed by the colon-separated list of paths
.Ev $XDG_CONFIG_DIRS ,
usually
.Pa /etc/xdg .
.It Pa ~/.config/catgirl
The most likely location of configuration files.
.
.It Pa $XDG_DATA_DIRS/catgirl
Save files are searched for first in
.Ev $XDG_DATA_HOME ,
usually
.Pa ~/.local/share ,
followed by the colon-separated list of paths
.Ev $XDG_DATA_DIRS ,
usually
.Pa /usr/local/share:/usr/share .
.It Pa ~/.local/share/catgirl
The most likely location of save files.
.El
.
.Sh EXIT STATUS
The
.Nm
client exits 0
if requested by the user,
.Dv EX_UNAVAILABLE
(69)
if the connection is lost,
and >0 if an error occurs.
.
.Sh EXAMPLES
Join
.Li #ascii.town
from the command line:
.Bd -literal -offset indent
catgirl -h chat.freenode.net -j '#ascii.town'
.Ed
.Pp
Create a configuration file in
.Pa ~/.config/catgirl/freenode :
.Bd -literal -offset indent
host = chat.freenode.net
join = #ascii.town
.Ed
.Pp
Load the configuration file:
.Bd -literal -offset indent
catgirl freenode
.Ed
.
.Ss Tips
Hide joins, parts and quits from a channel:
.Bd -literal -offset indent
ignore = * [JPQ][OAU][IR][NT] #example
.Ed
.
.Sh STANDARDS
.Bl -item
.It
.Rs
.%A Adam
.%A Attila Molnar
.%T IRCv3.2 invite-notify Extension
.%I IRCv3 Working Group
.%U https://ircv3.net/specs/extensions/invite-notify-3.2
.Re
.It
.Rs
.%A Jack Allnutt
.%T Modern IRC Client Protocol
.%I ircdocs
.%U https://modern.ircdocs.horse/index.html
.Re
.It
.Rs
.%A Kiyoshi Aman
.%A Kyle Fuller
.%A St\('ephan Kochen
.%A Alexey Sokolov
.%A James Wheare
.%T IRCv3 Message Tags
.%I IRCv3 Working Group
.%U https://ircv3.net/specs/extensions/message-tags
.Re
.It
.Rs
.%A Kiyoshi Aman
.%T IRCv3.1 extended-join Extension
.%I IRCv3 Working Group
.%U https://ircv3.net/specs/extensions/extended-join-3.1
.Re
.It
.Rs
.%A Waldo Bastian
.%A Ryan Lortie
.%A Lennart Poettering
.%T XDG Base Directory Specification
.%U https://specifications.freedesktop.org/basedir-spec/basedir-spec-latest.html
.%D November 24, 2010
.Re
.It
.Rs
.%A Christine Dodrill
.%T IRCv3.2 chghost Extension
.%I IRCv3 Working Group
.%U https://ircv3.net/specs/extensions/chghost-3.2
.Re
.It
.Rs
.%A Kyle Fuller
.%A St\('ephan Kochen
.%A Alexey Sokolov
.%A James Wheare
.%T IRCv3.2 server-time Extension
.%I IRCv3 Working Group
.%U https://ircv3.net/specs/extensions/server-time-3.2
.Re
.It
.Rs
.%A Lee Hardy
.%A Perry Lorier
.%A Kevin L. Mitchell
.%A William Pitcock
.%T IRCv3.1 Client Capability Negotiation
.%I IRCv3 Working Group
.%U https://ircv3.net/specs/core/capability-negotiation-3.1.html
.Re
.It
.Rs
.%A S. Josefsson
.%T The Base16, Base32, and Base64 Data Encodings
.%I IETF
.%R RFC 4648
.%U https://tools.ietf.org/html/rfc4648
.%D October 2006
.Re
.It
.Rs
.%A C. Kalt
.%T Internet Relay Chat: Client Protocol
.%I IETF
.%R RFC 2812
.%U https://tools.ietf.org/html/rfc2812
.%D April 2000
.Re
.It
.Rs
.%A Janne Mareike Koschinski
.%T IRCv3 setname Extension
.%I IRCv3 Working Group
.%U https://ircv3.net/specs/extensions/setname
.Re
.It
.Rs
.%A Mantas Mikul\[u0117]nas
.%T IRCv3.2 userhost-in-names Extension
.%I IRCv3 Working Group
.%U https://ircv3.net/specs/extensions/userhost-in-names-3.2
.Re
.It
.Rs
.%A Daniel Oaks
.%T Standard Replies Extension
.%I IRCv3 Working Group
.%U https://ircv3.net/specs/extensions/standard-replies
.Re
.It
.Rs
.%A Daniel Oaks
.%T IRC Formatting
.%I ircdocs
.%U https://modern.ircdocs.horse/formatting.html
.Re
.It
.Rs
.%A J. Oikarinen
.%A D. Reed
.%T Internet Relay Chat Protocol
.%I IETF
.%R RFC 1459
.%U https://tools.ietf.org/html/rfc1459
.%D May 1993
.Re
.It
.Rs
.%A William Pitcock
.%A Jilles Tjoelker
.%T IRCv3.1 SASL Authentication
.%I IRCv3 Working Group
.%U https://ircv3.net/specs/extensions/sasl-3.1.html
.Re
.It
.Rs
.%A William Pitcock
.%T IRCv3.1 multi-prefix Extension
.%I IRCv3 Working Group
.%U https://ircv3.net/specs/extensions/multi-prefix-3.1
.Re
.It
.Rs
.%A K. Zeilenga, Ed.
.%T The PLAIN Simple Authentication and Security Layer (SASL) Mechanism
.%I IETF
.%R RFC 4616
.%U https://tools.ietf.org/html/rfc4616
.%D August 2006
.Re
.El
.
.Ss Extensions
The
.Nm
client can take advantage of the
.Sy causal.agency/consumer
vendor-specific IRCv3 capability
implemented by
.Xr pounce 1 .
The consumer position is stored in the
.Cm save
file.
.
.Sh AUTHORS
.An June Bug Aq Mt june@causal.agency
.
.Sh BUGS
Send mail to
.Aq Mt list+catgirl@causal.agency
or join
.Li #ascii.town
on
.Li chat.freenode.net .