detachtty

If you've used screen, it's a similar concept, but more suited to traditional scrolling interfaces whereas screen is better for full-screen (e.g. curses-based) apps. Compared to screen, detachtty

• has no capability to swap between different screens (doesn't eat C-a)
• runs in line-at-a-time mode with no tty emulation (you can sanely use it in emacs comint modes or from inside a script(1) session)
• has no features (less to go wrong)
• and thus doesn't need a configuration file either

Example usage

server$ detachtty --dribble-file /var/log/cliki-dribble --log-file \
  /var/log/detachtty.log --pid-file /var/run/cliki.pid \
  /var/run/cliki-socket /usr/bin/lisp -eval '(load-system :telentweb)' \
  -eval '(progn (telentweb::init) (telentweb::start))' \

client$ attachtty dan@server:/var/run/cliki-socket

to quit attachtty press ^\

Running via detachtty at startup

Start a script late .. i.e. S9xlispapp in rc[2|3].d/

start S9xlispapp
#!/bin/sh
su - user -c /path/to/lisp-app-script
end S9xlispapp

start lisp-app-script
#!/bin/sh

detachtty --dribble-file /var/log/lisp-app-dribble --log-file \
  /var/log/detachtty.log --pid-file /var/run/lisp-app.pid \
  /var/run/lisp-app-socket /usr/bin/lisp -eval '(start-lisp-app)'

end lisp-app-script

A more featureful init.d startup script for debian and compatible linuxes is introduced in http://boinkor.net/archives/2006/02/starting_daemonized_lisp_image_1.html

Actual usage

detachtty is running the SBCL instance that CLiki runs on

Compatibility

detachtty is mostly tested on Debian GNU/Linux, but contributed patches for FreeBSD and Solaris have been merged into it, so it's probably not too hard to get running on many Unices

apparently, it worked on macos at one time, but that is no longer true under macos 10.4 (tiger). It seems that tiger's poll does not work as advertised. it works on Tiger using poll-emulator.darwinports.com ("OS_LOADLIBES=-lpoll -L/opt/local/lib" is the only change required to make it work on Intel, but I'm having some issues on PPC)

Download

i386 Debian and source packages (currently at version 9) are at ftp://ftp.linux.org.uk/pub/lisp/detachtty/. This package is also available in the main Debian repository. There's also a FreeBSD port, misc/detachtty, which you can get from the ports tree.

A new version, which includes the ablility to set timeouts and pass code to the detach'd lisp (for better scriptablity) is available in the darcs repo at:

http://common-lisp.net/project/bese/repos/detachtty

Patches against that code would are more than welcome.

This page is linked from: Daniel Barlow   reattatchabe slime  

CLiki pages can be edited by anyone at any time. Imagine a fearsomely comprehensive disclaimer of liability. Now fear, comprehensively