Run multiples jobs in background mod

Shell Programming and Scripting
1

Hi,

I have a problem runnig from script two diferents process in background mod. Is there a limitation to do this?

For example

echo "Running process one:"
./ProcessOne &
echo "Running process two:"
./ProcessTwo &
echo "The process are runnig. Bye"

The problem is that the execution of ProcessOne crash when starts process of ProcessTwo. Is there any way to do this?

Thanks!!!

NOTE: I need to run ProcessOne and ProcessTwo paralelly in background mod.

2

What do you mean crashed(i.e. messages logged)??

You can also try it like this:

echo "Running process one:"
nohup ./ProcessOne >> ${log_file} &
echo "Running process two:"
nohup ./ProcessTwo >> ${log_file} &
echo "The process are runnig. Bye"
3

Same problem. When i say crash, i mean the first process "stop" when the second process is sending to background.

---------- Post updated at 03:57 PM ---------- Previous update was at 03:41 PM ----------

Look this, the complete script:

echo "Launching first process.."
ProcessOne > /dev/null 2> /dev/null &
jobs -l 
#I need time to the process one do some things, 20 seconds is a good time
echo "Sleeping 20 seconds" 
sleep 20
echo "Launching second process.. "
ProcessTwo /dev/null 2> /dev/null &
jobs -l
echo "Finished."

The processTwo comunicates with processOne. But this is the output console

Launching first process..
[1] + 536870930  Running                 <command unknown>
Sleeping 20 seconds
Launching second process..
[2] + 268435475  Running                 <command unknown>
[1] - 536870930  Running                 <command unknown>
Finished.

For some reason the processOne doesnt execute well. If i do this with two consoles manually in foreground, the program executes well.

I hope you can help me.

Sorry for my english, is bad.

4

What is the program?

If it's an interactive thing which expects a terminal, it will get frozen when something else takes control of the terminal.

5

Ok, I see both jobs are running:

How? Examples......

I don't understand, What exactly do you mean?
Does 'P1' not respond to communication from 'P2'?

6

Exaccly. P1 and P2 are not an interactive program. They comunicates with messages with TCP, but i think it is not the question. The problem is when P2 starts, it say "connection time out" becouse P1 doesnt respond.

I repeat, if i do manually with two terminals, the process P1 and P2 work correctly.

7

Please answer this question.

8

Ok, Post code for these two scripts that you run in background that should talk to each other because one or the other does not like running in the background.