| 1 |
Stroller <stroller@××××××××××××××××××.uk> [14-09-28 18:52]: |
| 2 |
> |
| 3 |
> On Sun, 28 September 2014, at 5:08 pm, meino.cramer@×××.de wrote: |
| 4 |
> >>> ... |
| 5 |
> >>> I want to run programs, which insist on haveing a terminal |
| 6 |
> >>> to write their status to and which are writing files which |
| 7 |
> >>> their results on a headless computer (beaglebone). |
| 8 |
> >> |
| 9 |
> >> I would suggest to run the program in a screen session, you can disconnect |
| 10 |
> >> frim the session and reconnect later. |
| 11 |
> > |
| 12 |
> > ...the headless device will be booted and the programm will be startet |
| 13 |
> > via a kind of autostart script. No human intervention is |
| 14 |
> > wanted/possible... |
| 15 |
> |
| 16 |
> It's certainly possible to write such scripts to start automatically. |
| 17 |
> |
| 18 |
> E.G. from tmux's manpage: |
| 19 |
> |
| 20 |
> tmux new-session -d 'vi /etc/passwd' \; split-window -d \; attach |
| 21 |
> |
| 22 |
> Tested here: |
| 23 |
> |
| 24 |
> #!/bin/bash |
| 25 |
> tmux new-session -n meino -d |
| 26 |
> tmux send -t meino ls ENTER |
| 27 |
> |
| 28 |
> You would be able to access this: |
| 29 |
> |
| 30 |
> $ tmux list-w |
| 31 |
> 0: meino* (1 panes) [80x39] [layout c85d,80x39,0,0,0] @0 (active) |
| 32 |
> $ tmux a |
| 33 |
> |
| 34 |
> |
| 35 |
> I'm not saying that a terminal multiplexer is the best way to solve your problem - I don't understand why the output of your program is not directable to a text file - but it's definitely possible to script the process of running a program in a terminal multiplexer window or session. |
| 36 |
> |
| 37 |
> You could write a script to see if a specific named session exists, and start one if it doesn't. You could then call this every 5 minutes in cron. |
| 38 |
> |
| 39 |
> Note that, in the example above I've named the window "meino" - I think you might be advised to name both window and session. You can attach sessions by name. |
| 40 |
> |
| 41 |
> I referred to this page: http://serverfault.com/questions/339390/run-command-in-detached-tmux-session |
| 42 |
> It's a top google hit for "run command in tmux" |
| 43 |
> |
| 44 |
> Stroller. |
| 45 |
> |
| 46 |
|
| 47 |
I tried to redirect the output, which technically is comparable with what |
| 48 |
can be seen by running "top". The result as mentioned is a somewhat |
| 49 |
locked process and its zombie child. |
| 50 |
|
| 51 |
Starting of whatever will accomplish what I am trying to do is already |
| 52 |
implemented (somewhow uglyish...;) and works...beside of the |
| 53 |
sideeffect that the program goes zombie. |
| 54 |
|
| 55 |
I definately will try the screen or tmux version (or both ;) ) ! |
| 56 |
|
| 57 |
Thank you very much for all help ! |
| 58 |
Best regards, |
| 59 |
mcc |
Archives