sending remote command to background process + out log

c0m4r · 02-01-2010, 01:08 PM

Hi,

Because of my English skills I'll try to explain this subject as best I can, thank you for understanding. Fisrt of all, I am running some program on my slackware in background (using standard method - &). I need to make a script, which allows sending command to this process on my machine from another one. Furthermore this program have to be logged out (standard output f.e. ./myprogram > log.out.txt).

It might be a separate Program A which runs my Program B but it cannot be screen, because it is not working like I'd like to and it cannot be java, because it's slow and working not the best so to speak.

Thank you for your support.

Best regards,
Andrew

Web31337 · 02-01-2010, 01:33 PM

why not add networking or unix-sockets(or a shared file at least) in order to communicate with a process?
or use signaling system.
which language is your program written with?

c0m4r · 02-01-2010, 01:53 PM

Quote:

why not add networking or unix-sockets(or a shared file at least) in order to communicate with a process?

Unfortunately I do not quite understand. Can you refer to any article about it? Program is started by common bash script. I have no idea about used programming language.

chrism01 · 02-01-2010, 05:31 PM

Do you mean the program is started in a bash script, or is it written in bash? If it's not written in bash, what programming language is it written in?

c0m4r · 02-02-2010, 02:43 AM

It's acutally game server. I am starting it like this:

./myscript which is starting -> ./hlds_run - which is a bash script, and this script is starting another process, depending on which cpu you have, f.e. hlds_i686 for intel.

Quote:

hlds_i686: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), dynamically linked (uses shared libs), not stripped

That's the everything I got from compiled bin.

zhjim · 02-02-2010, 04:23 AM

To be honest I'd go with screen which realy is the easiest solution. Maybe we can help you sort out the problems you had?

Nother thing would be to use the fg shell command. Start the half live server in background

Code:

hlds_start > /tmp/log_hdls &

Then from the other programm run

Code:

fg
command you want to send

I guess this will not work as expected cause the fg takes another input than the programm running but who knows.

Else you would have to work with some kind of tty reader and writer.
Maybe this link helps out. I just touched it but might be the chance to write some C prog to achieve what you need.
http://www.win.tue.nl/~aeb/linux/lk/lk-11.html

c0m4r · 02-02-2010, 04:34 AM

Quote:

I guess this will not work as expected cause the fg takes another input than the programm running but who knows.

It is not that simple as it might be.