====== function, reply and prompt ======

|x| Tutorial [ ] Guide [x]|

===== function (fn) =====

^#^Examples^
|**1.**|…[[resources_for_website_builders#editing_text|“vim”]] and “emacs” which offer an unmatched degree of customization.|
|//a.//|''fn vim { sam $* }''|
|**2.**|//Grep, but force listing of filename:lineno so you can click on an entry to jump to it in an editor.//|
|//a.//|''fn gn { grep -n $* /dev/null }''|
|**3.**|//Tree enumerator (simple "find") useful for many purposes//|
|//a.//|''fn f { du -a $* <nowiki>|</nowiki> sed 's/^.*//	((This whitespace is a tab.))//<nowiki>//</nowiki>g' }'' ⇐ that whitespace is a tab|
|**4.**| [[plan9front_-_acme_sam_abaco_mothra_and_man#acme|acme]] |
|//a.//|''fn acme { /bin/acme -b -c 1 $* }''|

**Example #1:**

<code>
cpu% lc profile.edit
profile.edit
cpu% sam -d profile.edit
 -. profile.edit
/fn
fn
	fn term%{ $* }
/fn
fn
	fn cpu%{ $* }
a
	fn vim { sam $* }
.
w
profile.edit: #991
q
cpu%
</code>

=== whatis vim: ===

<code>
cpu% whatis vim
fn vim {
	sam $*
}
cpu%
</code>

===== reply with selected text =====

|x|''|ireply'' is mentioned as an rc example, while an ''acme'' **Reply** is available.|

=== ireply: ===

<file config $home/bin/rc/ireply>
#!/bin/rc
awk '{ print "> " $0}'
</file>

|1.|select text to include in reply with button 1|
|2.|//type ((Prepend ''ireply'' with the pipe (''|'').))// **''|ireply''** in message tag and run with button 2|
|3.|run **''reply''** in message tag with button 2|
|4.|use the button 1,3 chord to paste text into reply|
|5.|remove Include: line from message and type your reply.|

Start acme to access the mbox.

<code>
  % acme
</code>

^Newcol Kill Putall Dump Exit^^^
|**New Cut Paste Snarf Sort Zerox Delcol**|:::|

^Newcol Kill Putall Dump Exit^^^
|**New Cut Paste Snarf Sort Zerox Delcol**|:::|⇐ Add //Mail// by typing ''Mail''.|

^Newcol Kill Putall Dump Exit^^^
|**New Cut Paste Snarf Sort Zerox Delcol Mail**|:::|⇐ Mouse button 2 press //Mail//.|

^Newcol Kill Putall Dump Exit^^^
|**New Cut Paste Snarf Sort Zerox Delcol Mail**|
|**///mail/fs/mbox//** **Del Snarf : Look Put Mail Delmesg Undelmesg Next**|
|2/|:::|⇐ An Email messages is here. Mouse button 3 press #2.|
|1/|
|**///mail/fs/mbox/2///** **Del Snarf : Look Reply all Mail Delmesg Save |ireply**|:::|⇐ Add //|ireply// by typing ''|ireply''. Mouse button 2 press //|ireply// after highlighting the text (below) to include in the reply, then mouse button 2 press //Reply//.|
|From: ne1nb00k@9p.sdf.org|
|To:   ne1nb00k@9p.sdf.org|
|Date: Fri Jun 24 23:06:59 +0000 2022|
|Subject: practice reply|
|[blank]|
|That was some good neinbook!|
|[blank]|
|> Some text to reply to|:::|⇐ This is the text highlighting example area.|
|[blank]|
|Other text|
|Other text|

=== whatis ireply: ===

<code>
cpu% whatis ireply
/bin/ireply
cpu%
</code>

===== prompt =====

<code>
  cpu% cp $home/lib/profile $home/lib/profile.bak
</code>

^#^Examples^
|**1.**|//To set your prompt in rc to reflect your current directory add this to your profile.//|
|//a.//|''<nowiki>fn cd { builtin cd $* && prompt=(`{pwd}^% '' ) }</nowiki>''|
|**2.**|//If you make frequent use of cpu's -''h'' and ''-u'' arguments, this variant keeps track of the host you are connected to, and as which user://|
|//a.//|''<nowiki>prompt = (`{cat /dev/user}^@^`{cat /dev/sysname}^'% '  '	')</nowiki>''|
|//a.//|''<nowiki>fn `{echo $prompt(1) | tr -d ' 	'} { $* }</nowiki>''|
|**3.**|A Plan 9 Boot Camp user contributed prompt.|
|//a.//|''<nowiki>prompt=('['^`{pwd}^'] '^$sysname^'% ' ' ')</nowiki>''|
|//b.//|''<nowiki>fn cd {builtin cd $* && prompt=('['^`{pwd}^'] '^$sysname^'% ' ' ')}</nowiki>''|

**Example #1:**

<code>
cpu% lc profile.edit
profile.edit
cpu% sam -d profile.edit
 -. profile.edit
/fn
fn
	fn term%{ $* }
/fn
fn
	fn cpu%{ $* }
s/cpu%{ \$\*/cd { builtin cd $* \&\& prompt=(`{pwd}^% '' )
.
	fn cd { builtin cd $* && prompt=(`{pwd}^% '' ) }
w
profile.edit: #1007
q
cpu%
</code>

=== whatis cd: ===

<code>
cpu% whatis cd
fn cd {
	builtin cd $* && prompt=(`{
		pwd
	}^% '')
}
cpu%
</code>