[Alpine-info] Screen and Alpine and Window-Titles

[Dan Mahoney, System Admin]

On Thu, 4 Dec 2008, Rick Troxel wrote:


> Today (12/04/08) at 18:53 -0500, Dan Mahoney, System Admin wrote:

>

>> In my .cshrc I have the following:

>> 

>> if ($TERM == "screen") then

>> alias postcmd   'printf "\033%s%s %s %s\033\\" "k" "\!#:0" "\!#:$" 

>> "[$HOST]"'

>> endif

>> 

>> However I find that whenever alpine calls another command (a filter, a 

>> pipe, a viewer), that command gets written to (and stuck as) my screen 

>> label.

>> 

>> This doesn't happen if say, from tcsh I launch bash and run commands. Does 

>> alpine somehow return to the shell and background itself when running a 

>> pipe?

>> 

>> -Dan

>

> I recently worked around this symptom by switching from 

> color-style=use-termdef to color-style=no-color.


..I wonder why that would fix it?  Perchance when pine runs a pipe 
command, its viewer suppresses the escape codes?  Strictly speaking, why 
is pine touching the escape codes for window titling, as they are not 
affected by color.

Did you also experience the issue when running a viewer?  Right now I just 
viewed a URL and my window title is:

/usr/local/bin/links http://gushi.livejournal.com/450565.html 
[prime.gushi.org]

So this isn't just a case of escape-code polluting (i.e. the color-change 
escape code being interpreted as a window-titler).

The real question is this:  is postcmd being run?  If so why?  It seems it 
is.

I could set postcmd to echo itself out to a file or something -- but is 
there someone more active in development who can tell me how these 
processes are run?  Does alpine suspend?  Fork?  Background?  Is it 
running a subshell?

When I set no-color, I still a) saw lynx in color (which implied alpine 
wasn't stripping the codes) and b) had my shelltitle reset.

Anyone else able to comment?

-- 

"Hitler, Satan, those Hanson kids, anything.  Just not the curious
anteater."

-Peter Scolari, as Wayne Szalinki in "Honey, I Shrunk The Kids--The
Series"


--------Dan Mahoney--------
Techie,  Sysadmin,  WebGeek
Gushi on efnet/undernet IRC
ICQ: 13735144   AIM: LarpGM
Site:  http://www.gushi.org
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