Re start a program after it crashes

[erondem]

In my pi there is a progam written by me and it crashes if internet goes for long time. I need to re login via ssh and start again the program.
What I need is when program.exe stopped working it needs to be re-started.



I added both below lines to one by one to ~/.config/lxsession/LXDE-pi/autostart but it didn't help

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sudo /home/pi/Desktop/program.exe

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cd /home/pi/Desktop; ./program.exe

here is how my autostart looks like

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@lxpanel --profile LXDE-pi
@pcmanfm --desktop --profile LXDE-pi
@cd /home/pi/Desktop;  program.exe

Do you guys have any idea? Thanks in advance

Ps: it is not a gui program

[RaTTuS]

yes use a wrapper script

not tested :-

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#!/bin/bash
while :
do 
  program.exe
done

then run that script instead of your program

or write your code better


N.B.
why call it .exe - thats not the linux / unix way

[erondem]

yes use a wrapper script

not tested :-

Code: Select all

#!/bin/bash
while :
do 
  program.exe
done

then run that script instead of your program

or write your code better


N.B.
why call it .exe - thats not the linux / unix way

But how does tihs script understand if program.p(lets call it .p instead of .exe thanks for this) running at that time?

[MarkDH102]

My advice is to look at the error that is being generated (a http request timeout?) and trap it WITHIN your program. Enclose the call that is crashing within a Try..Catch block (language dependent of course). This is the RIGHT way to tackle such things.
Here is an example of some Python code I use.

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try :

    page = requests.get('http://www.worcesternews.co.uk/li/traffic_and_travel.in.Worcester', timeout = 15.0)
except (TimeoutException, requests.ConnectionError, requests.Timeout, requests.RequestException):
    # YELLOW LED on
    GPIO.output(CONST.INTERNET_ACCESS_LED, 0)
    # Presumably , no internet connection...
    key.addstr(15, 0, "Error (Timeout)")
except :
    e = sys.exc_info()[0]
    key.addstr(15, 0, "Error (Unknown) {}".format(e))
finally:
   # Kill the timeout...

My program runs in a console window and writes to the console using the "curses" library - key.addstr.

[RaTTuS]

yes use a wrapper script

not tested :-

Code: Select all

#!/bin/bash
while :
do 
  program.exe
done

then run that script instead of your program

or write your code better


N.B.
why call it .exe - thats not the linux / unix way

But how does tihs script understand if program.p(lets call it .p instead of .exe thanks for this) running at that time?

it does not know if it's already running
but when program exits it will just loop round and run it again [either exiting normally or errors] - this will not help if the program crashes as a zombie but that's another issue
...