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com [2024/09/02 23:11] – ' hc9com [2025/01/26 19:32] (current) – Fixed the bullet point in COM program section. stug
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 +====== com ======
 +
 +//COM is not IRC//
 +
 +===== What is COM? =====
 +
 +So you type “''irc''” at the command prompt hoping to join your favorite channel and instead find yourself in this strange world where you have to press space to talk, the commands you expect don't work, and you can't even figure out how to quit (hint: try ‘**q**’). This is ‘COM’ (aka, ‘COMMODE’ or just ‘com’).
 +
 +COM is a chat program which is unique to SDF. The original version dates back to 1994 and it has been developed and used on the SDF servers ever since. Together with the “''bboard''” BBS it is one of the primary ways SDF users communicate with each other. Some features may be familiar to you from other programs, but many will be new to you. Most notably, COM is command-driven, meaning that you are in “command mode” by default and must hit a key (spacebar or enter) before you can talk. See below for additional [[com#com_commands |commands]], all of which are simply typed in from command mode.
 +
 +So why did you get COM when you expected IRC? For reasons of security and concerns about abuse, IRC access is not allowed unless you are an ARPA member or higher. If you are reading this then it is likely you are not. For this reason when you type “''irc''” at the shell, COM will be launched instead. This allows new users an opportunity to interact with other SDF users and hopefully answer some of the questions they might have. Unlike IRC, COM is not network-based and only users who are currently logged into SDF can use it.
 +
 +Basic rules of etiquette to keep in mind:
 +
 +  * Many people idle in com. You can check idle times with ‘**I**’. If the room has been quiet for a while, say hello but give people time to respond. If you have not read the tutorial you may get some coarse replies, and you might end up here, now, reading this. Welcome. :)
 +
 +Things //not// to do:
 +
 +  * Ask how to ‘hack’.
 +  * Attempt to use any IRC commands (they won't work and will make you look foolish).
 +  * Repeat the same question over and over.
 +
 +===== Getting started: a walkthrough =====
 +
 +COM is based around ‘rooms’. The default room you enter when you start the program is ‘lobby’, SDF's Welcoming Room.
 +
 +Type “''com''” at the command line to start com. When com starts, you will be placed in ‘lobby’. A list of users will be displayed. You will also be in **command** mode. In **command** mode, all you will see the cursor; there will not be a prompt. Command mode allows commands to be run such as seeing a list of users.
 +
 +In **command** mode, type **w** to see a **list of users**, the name of the room you are in, as well as the **topography**.
 +
 +The output will look something like
 +
 +    [you are in 'spacebar' among 1]
 +    
 +    wliao@iceland
 +
 +Now, type **l** (lower case L) to see a list of rooms. The output will look something like
 +
 +      room-name   #    created      time  topic
 +      --------------------------------------------------------------------------------
 +      spacebar    16   22-Aug-16  08:49:32  there is life out there
 +      lobby       1    09-Sep-16  08:49:13  SDF's Welcoming Room
 +      anonradio   19   09-Sep-16  04:11:06  DJ Kumata!
 +      --------------------------------------------------------------------------------
 +
 +There seems to be a lot of users in the room “spacebar”. Let us join in on the fun, shall we? Type **g** and the name of the room to join.
 +
 +      :goto> spacebar
 +
 +When entering the room, a list of users will be displayed. Now, let us say hello to the room.
 +
 +Enter **a space** to enter “talk” mode. When entering talk mode, **a prompt of your user name** will appear. Say “hello” to the world and end the line with an enter key.
 +
 +      [wliao]    hello world!
 +
 +The next thing you'll probably want to know is what people talked about before you entered so you can join in the chatter. Type **''r''** to get a short 18 line “r”eview of what was said last. If you want more context, press **R**. You will see a prompt like this:
 +
 +      :lines>
 +
 +Just type the number of lines you are interested in and finish with return; you'll get a scrollable history of said lines length.
 +
 +When you are ready to quit, type **q** to leave com. You will see an “**''Unlinking TTY ..''**” message appear.
 +
 +===== FAQ =====
 +
 +^ Q      ^ A ^
 +| How do I use backspace in com? | Try **''-''** in command mode in com to toggle behavior. Or, use stty or ‘bksp’ to set the backspace correctly. |
 +| How can I be in com multiple times? | The basic rule is to be on a different server when entering com. Some common ways of doing this is to use //''screen''//, run //''ssh''// twice, etc.|
 +| How do I send private messages? | Use the **s** command in command mode: **''s''**''user@host''. Please note the //@host// portion; this is a required element of the command. If the user is in another room, add an optional host parameter to send the message: **''s''**''user@host'' //room//. |
 +| How do I see what happened in the past? | Use the **''r''** key to review. Use **''R''** followed by a number to control how many lines of history to review. The **''p''** key can be used to see the history of another room: **''p''**//''roomname''//. The **''p''** command can also take an optional number of lines to display: **''p''**//''roomname''// //number//. |
 +| How do I see who is in another room? | Use **''W''** (upper case w) to see who is in another room.|
 +| I see “''<wliao@iceland DUMPs in 22 characters of 2 words in 3 lines>''”. What does that mean? | Use the **''r''** or **''R''** command. |
 +| I see “''<wliao appears>''”. How do I do that? | Use the **''e''**mote command in command mode. Use **''e''** followed by the action at the prompt: “//:emote> tests this out//”. |
 +| Why do I have to keep pressing the spacebar to talk? | Other keys can be used to enter input mode. Try the **''h''** to see what keys are not being used such as the enter key. |
 +| How do I erase a message I've been typing? | Use <nowiki>^</nowiki>''u'' (control + u) to erase the line. <nowiki>^</nowiki>''w'' (control + w) will erase a word. |
 +| I accidentally ignored somebody! I didn't mean to do that :( | **''i''**gnore the same user again to remove from the ignore list.|
 +| Why isn't anybody talking? | That's life. Harden up. |
 +
 +===== COM Commands =====
 +
 +Here is a list of commonly used COM Commands. It only covers the basics, so refer to the online help (with ‘**h**’) or man page for more information. Some of the commands will not be available to pre-validated users.
 +
 +  * **“ ”**  or **''[RETURN]''** – begin ‘talk’ mode. Start typing your message. It will post when you press ''[RETURN]''.
 +  * **''e''** – emote
 +  * **''E''** – toggle ‘echo’ (if echo is off you won't see the message you are typing)
 +  * **''g''** – goto a room
 +  * **''h''** – command help
 +  * **''I''** – user idle query
 +  * **''l''** – (lowercase L) list open rooms
 +  * **''L''** – post a link to com
 +  * **''o''** – toggle ‘overstrike’ (this means you can see other people's messages while you are typing yours–just keep typing!)
 +  * **''p''** – peek into room
 +  * **''q''** – quit commode
 +  * **''r''** – room history
 +  * **''R''** – extended history
 +  * **''s''** – send private message
 +  * **''w''** – (lower case w) who is in the current room
 +  * **''W''** – (upper case w) who is in a different room
 +  * **''-''** – (hyphen) key in command mode will fix your backspace (use this if your backspace keeps showing up as ''^h'' or ''^?'')
 +  * **''+''** – tell you utc
 +  * **''U''** – (capital u) will tell you how long other users have been members and if they are ARPA or Meta-can-validate you
 +
 +**Note:** //Although you type// “''com''” //to start com, the man page is accessed with// “''man commode''”.
 +
 +===== Useful COM Adjacent Programs =====
 +
 +  * **''comwho''** - When used in the shell, provides a list showing who is on COM, the room they are in and how long they have been idle for.
 +
 +----
 +
 +[[http://sdf.org/?tutorials/comnotirc|COM is not IRC]] - traditional link (using [[wp>Revision_Control_System|RCS]])