strange behavior of my application

Flastick · Post by **Flastick** » Sat Mar 08, 2008 2:18 pm

Hi all !
I tested my program on kubuntu and it worked great and now I would like to run it on debian (sarge ) by ssh (remote access).

so I launch it tiping root> ./myprogram (this is not a graphical application) and then I can tip anything ..nothing happens ..it's like it makes everything freeze. But the program is working great! And if I close the ssh console, the program just ends..why??

here is how looks my callback :

Repeat
SEvent = NetworkServerEvent()

If SEvent
....
....
EndIf

Delay(5)

ForEver

Is anything wrong with the way I launch it? or the way I made my callback ?

Thanks in advance for your help !!

walker · Post by **walker** » Sat Mar 08, 2008 7:26 pm

starting an app from a console makes the console wait for the end of the programm... unless you use the & (ampersand) behind the app..
i.e. myprompt>./mypgm &
then the app is started in the background while the console still replies... though output of your pgm is still directed to this console (unless you redirect it)

Flastick · Post by **Flastick** » Sun Mar 09, 2008 7:35 pm

Thank you for your answer ! I just didn't understand your last sentence : " though output of your pgm is still directed to this console (unless you redirect it)" Does it mean that if I quit the console all the programs wich have been executed from this console will end ? And where can I redirect it? to another console? Sorry I'm a new linux user.. !

walker · Post by **walker** » Wed Mar 12, 2008 12:54 pm

start your program with an ampersand as "parameter"
i.e bash>myprog &

then you can close the console using the exit command (do NOT close the console with the close-button of the systemmenu) and your pgm is still running...

if you do not use the & .. the started prog will be terminated if you close the console (and without the & you can only use the close-button....)

with > and >> you can redirect the output of your pgm to a file

bash> myprog >mylog.txt &
will create a file mylog.txt and the output is redirected into this file

bash> myprog >>mylog.txt &
will append the output to a file called mylog.txt and only if it does not exist, it will be created

there also exists a pipe | which will redirect the output of pgm1 as input for pgm2

bash> myprog1 | myprog2 &

a conditional Pipe && which will start end execute the second pgm if the first one returns true

bash> myprog1 && myprog2 &

there are some more constellations I don't remember at the moment...

Flastick · Post by **Flastick** » Thu Mar 13, 2008 5:35 pm

Oh okay ! Now I understood everything.
Thank you ! I'll try this right now !