.Dd May 29, 2022 .Dt CATGIRL 1 .Os . .Sh NAME .Nm catgirl .Nd IRC client . .Sh SYNOPSIS .Nm .Op Fl KRelqv .Op Fl C Ar copy .Op Fl H Ar hash .Op Fl I Ar highlight .Op Fl N Ar notify .Op Fl O Ar open .Op Fl S Ar bind .Op Fl T Ns Op Ar timestamp .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 m Ar mode .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 .Fl o .Op Fl S Ar bind .Op Fl h Ar host .Op Fl p Ar port .Op Ar config ... . .Nm .Fl g Ar cert . .Sh DESCRIPTION The .Nm IRC client provides a curses interface for TLS-only Internet Relay Chat. The only required option is .Fl h , the host name to connect to. See .Sx EXAMPLES for managing further configuration. Type .Ic /help in .Nm to view the list of .Sx COMMANDS and .Sx KEY BINDINGS . . .Pp Options can be loaded from files listed on the command line. Files are searched for in .Pa $XDG_CONFIG_DIRS/catgirl .Po usually .Pa ~/.config/catgirl .Pc unless the path starts with .Ql / , .Ql \&./ or .Ql \&../ . Files and flags listed later on the command line take precedence over those listed earlier. . .Pp Each option is placed on a line, and lines beginning with .Ql # are ignored. The options are listed below following their corresponding flags. . .Bl -tag -width Ds .It Fl C Ar util | Cm copy No = Ar util Set the utility used by .Ic /copy . Subsequent .Cm copy options append arguments to .Ar util . The URL to copy is provided to .Ar util on standard input. The default is the first available of .Xr pbcopy 1 , .Xr wl-copy 1 , .Xr xclip 1 , .Xr xsel 1 . . .It Fl H Ar seed,bound | Cm hash No = Ar seed,bound Set the initial seed of the nick and channel color hash function and the maximum IRC color value produced by the function. The default is 0,75. To use only colors from the 16-color terminal set, use 0,15. To disable nick and channel colors, use 0,0. . .It Fl I Ar pattern | Cm highlight No = Ar pattern Add a case-insensitive message highlight pattern, which may contain .Ql * , .Ql \&? and .Ql [] wildcards as in .Xr glob 7 . The format of the pattern is as follows: .Bd -ragged -offset indent .Ar nick Ns Op Ar !user@host Op Ar command Op Ar channel Op Ar message .Ed .Pp The commands which can be matched are: .Sy INVITE , .Sy JOIN , .Sy NICK , .Sy NOTICE , .Sy PART , .Sy PRIVMSG , .Sy QUIT , .Sy SETNAME . . .It Fl K | Cm kiosk Disable the .Ic /copy , .Ic /debug , .Ic /exec , .Ic /join , .Ic /list , .Ic /msg , .Ic /open , .Ic /part , .Ic /query , .Ic /quote commands. Replace the username with a hash of its original value. . .It Fl N Ar util | Cm notify No = Ar util Send notifications using a utility. Subsequent .Cm notify options append arguments to .Ar util . The window name and message are provided to .Ar util as two additional arguments, appropriate for .Xr notify-send 1 . . .It Fl O Ar util | Cm open No = Ar util Set the utility used by .Ic /open . Subsequent .Cm open options append arguments to .Ar util . The URL to open is provided to .Ar util as an argument. The default is the first available of .Xr open 1 , .Xr xdg-open 1 . . .It Fl R | Cm restrict Disable the .Ic /copy , .Ic /exec and .Ic /open commands, the .Cm notify option, and viewing this manual with .Ic /help . . .It Fl S Ar host | Cm bind No = Ar host Bind to source address .Ar host when connecting to the server. To connect from any address over IPv4 only, use 0.0.0.0. To connect from any address over IPv6 only, use ::. . .It Fl T Ns Oo Ar format Oc | Cm timestamp Op = Ar format Show timestamps by default, in the specified .Xr strftime 3 .Ar format . The format string may contain raw IRC formatting codes. The default format is .Qq \&%X . . .It Fl a Ar user : Ns Ar pass | Cm sasl-plain No = Ar user : Ns Ar pass Authenticate as .Ar user with .Ar pass using SASL PLAIN. Leave .Ar pass blank to prompt for the password. . .It Fl c Ar path | Cm cert No = 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 .Cm priv . With .Cm sasl-external , 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 .Cm cert . 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 No = Ar host Connect to .Ar host . . .It Fl i Ar pattern | Cm ignore No = Ar pattern Add a case-insensitive message ignore pattern, which may contain .Ql * , .Ql \&? and .Ql [] wildcards as in .Xr glob 7 . The format of the pattern is as follows: .Bd -ragged -offset indent .Ar nick Ns Op Ar !user@host Op Ar command Op Ar channel Op Ar message .Ed .Pp The commands which can be matched are: .Sy INVITE , .Sy JOIN , .Sy NICK , .Sy NOTICE , .Sy PART , .Sy PRIVMSG , .Sy QUIT , .Sy SETNAME . . .It Fl j Ar channels Oo Ar keys Oc | Cm join No = Ar channels Oo Ar keys Oc Join the comma-separated list of .Ar channels with the optional comma-separated list of channel .Ar keys . . .It Fl k Ar path | Cm priv No = 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 m Ar mode | Cm mode No = Ar mode Set the user .Ar mode . . .It Fl n Ar nick Oo Ar ... Oc | Cm nick No = Ar nick Oo Ar ... Oc Set nickname to .Ar nick . The default nickname is the value of the environment variable .Ev USER . Additional space-separated nicks will be tried in order if the first is not available, and all nicks are treated as highlight words. . .It Fl o Print the server certificate chain to standard output in PEM format and exit. . .It Fl p Ar port | Cm port No = Ar port Connect to .Ar port . The default port is 6697. . .It Fl q | Cm quiet Raise the default message visibility threshold for new windows, hiding general events (joins, quits, etc.). . .It Fl r Ar real | Cm real No = Ar real Set realname to .Ar real . The default realname is the same as the nickname. . .It Fl s Ar name | Cm save No = Ar name Save and load 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 / , .Ql \&./ , or .Ql \&../ . . .It Fl t Ar path | Cm trust No = Ar path Trust the self-signed certificate loaded from .Ar path and disable server name verification. 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 No = 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 window as well as standard error if it is not a terminal. . .It Fl w Ar pass | Cm pass No = Ar pass Log in with the server password .Ar pass . Leave .Ar pass blank to prompt for the password. .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 /ns CERT ADD .Ed .It Enable SASL EXTERNAL to require successful authentication when connecting (not possible on all networks): .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 -o -h irc.example.org > ~/.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 INTERFACE The .Nm interface is split into three areas. . .Ss Status Line The top line of the terminal shows window statuses. Only the currently active window and windows with activity are listed. The status line for a window might look like this: .Bd -literal -offset indent 1+ #ascii.town +3 ~7 @ .Ed .Pp The number on the left is the window number. Following it may be one of .Ql - , .Ql + , .Ql ++ , as well as .Ql = . These indicate the message visibility threshold and mute status of the window. .Pp On the right side, the number following .Ql + indicates the number of unread messages. The number following .Ql ~ indicates how many lines are below the scroll position. An .Ql @ indicates that there is unsent input in the window's .Sx Input Line . .Pp .Nm will also set the terminal title, if possible, to the name of the network and active window, followed by the unread count for that window, and the unread count for all other windows in parentheses. . .Ss Chat Area The chat area shows messages and events. Regular messages are shown with the nick between .Ql <> angle brackets. Actions are shown with the nick preceded by .Ql * . Notices are shown with the nick between .Ql - hyphens. .Pp Blank lines are inserted into the chat as unread markers. .Pp While scrolling, the most recent 5 lines of chat are kept visible below a marker line. . .Ss Input Line The bottom line of the terminal is where messages and commands are entered. When entering a message, action or notice, your nick appears on the left, as it would in the .Sx Chat Area . When entering a command, no nick is shown. .Pp Formatting codes are shown in the input line as reverse-video uppercase letters. These will not appear in the sent message. .Pp Input that is too long to send as a single message will have a red background starting at the point where it will be split into a second message. . .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 Op Ar channel Op Ar key Join the named channel, the current channel, or the channel you've been invited to. .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. Use .Ic M-- to show unknown replies. .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 Op Ar nick Query information about a user or yourself. .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 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 /highlight Op Ar pattern List message highlight patterns or temporarily add a pattern. To permanently add a pattern, use the .Cm highlight option. .It Ic /ignore Op Ar pattern List message ignore patterns or temporarily add a pattern. To permanently add a pattern, use the .Cm ignore option. .It Ic /move Oo Ar name Oc Ar num Move the named or current 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 /unhighlight Ar pattern Temporarily remove a message highlight pattern. .It Ic /unignore Ar pattern Temporarily remove a message ignore pattern. .It Ic /window List all windows. .It Ic /window Ar name | substring Switch to window by name or matching substring. .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 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 .Pp Arrow and navigation keys also work as expected. . .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-+ Raise message visibility threshold, hiding ignored messages, general events (joins, quits, etc.), or non-highlighted messages. .It Ic M-- Lower message visibility threshold, showing ignored messages and unknown replies. .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 and with timestamps. 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-s Reveal spoiler text. .It Ic M-t Toggle timestamps. .It Ic M-u Scroll to first unread line. .It Ic M-v Scroll up a page. .El . .Ss IRC Formatting .Bl -tag -width "C-z C-v" -compact .It Ic C-z C-v Insert the next input character literally. .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 p Manually toggle paste mode. .It Ic C-z r Toggle reverse color. .It Ic C-z s Set spoiler text (black on black). .It Ic C-z u Toggle underline. .El . .Pp Some color codes can be inserted with the following: .Bl -column "C-z A" "magenta" "C-z N" "orange (dark yellow)" .It Ic C-z A Ta gray Ta Ic C-z N Ta brown (dark red) .It Ic C-z B Ta blue Ta Ic C-z O Ta orange (dark yellow) .It Ic C-z C Ta cyan Ta Ic C-z P Ta pink (light magenta) .It Ic C-z G Ta green Ta Ic C-z R Ta red .It Ic C-z K Ta black Ta Ic C-z W Ta white .It Ic C-z M Ta magenta Ta Ic C-z Y Ta yellow .El . .Pp To set other 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 shell used by .Ic /exec . The default is .Pa /bin/sh . .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 any other error occurs. . .Sh EXAMPLES Join .Li #ascii.town from the command line: .Bd -literal -offset indent $ catgirl -h irc.tilde.chat -j '#ascii.town' .Ed .Pp Create a configuration file in .Pa ~/.config/catgirl/tilde : .Bd -literal -offset indent host = irc.tilde.chat join = #ascii.town .Ed .Pp Load the configuration file: .Bd -literal -offset indent $ catgirl tilde .Ed . .Sh STANDARDS .Bl -item .It .Rs .%A Adam .%A Attila Molnar .%T invite-notify Extension .%I IRCv3 Working Group .%U https://ircv3.net/specs/extensions/invite-notify .Re .It .Rs .%A Jack Allnutt .%A Val Lorentz .%A Daniel Oaks .%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 Message Tags .%I IRCv3 Working Group .%U https://ircv3.net/specs/extensions/message-tags .Re .It .Rs .%A Kiyoshi Aman .%T extended-join Extension .%I IRCv3 Working Group .%U https://ircv3.net/specs/extensions/extended-join .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 .%A Ryan .%A James Wheare .%T chghost Extension .%I IRCv3 Working Group .%U https://ircv3.net/specs/extensions/chghost .Re .It .Rs .%A Kyle Fuller .%A St\('ephan Kochen .%A Alexey Sokolov .%A James Wheare .%T server-time Extension .%I IRCv3 Working Group .%U https://ircv3.net/specs/extensions/server-time .Re .It .Rs .%A Lee Hardy .%A Perry Lorier .%A Kevin L. Mitchell .%A Attila Molnar .%A Daniel Oakley .%A William Pitcock .%A James Wheare .%T Client Capability Negotiation .%I IRCv3 Working Group .%U https://ircv3.net/specs/core/capability-negotiation .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 setname Extension .%I IRCv3 Working Group .%U https://ircv3.net/specs/extensions/setname .Re .It .Rs .%A Mantas Mikul\[u0117]nas .%T userhost-in-names Extension .%I IRCv3 Working Group .%U https://ircv3.net/specs/extensions/userhost-in-names .Re .It .Rs .%A Daniel Oaks .%T IRC Formatting .%I ircdocs .%U https://modern.ircdocs.horse/formatting.html .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 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 .Re .It .Rs .%A William Pitcock .%T multi-prefix Extension .%I IRCv3 Working Group .%U https://ircv3.net/specs/extensions/multi-prefix .Re .It .Rs .%A James Wheare .%T Message IDs .%I IRCv3 Working Group .%U https://ircv3.net/specs/extensions/message-ids .Re .It .Rs .%A James Wheare .%T reply Client Tag .%I IRCv3 Working Group .%U https://ircv3.net/specs/client-tags/reply .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 implements the .Sy causal.agency/consumer vendor-specific IRCv3 capability offered by .Xr pounce 1 . The consumer position is stored in the .Cm save file. . .Sh AUTHORS .An June McEnroe Aq Mt june@causal.agency . .Sh BUGS Send mail to .Aq Mt list+catgirl@causal.agency or join .Li #ascii.town on .Li irc.tilde.chat .