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Top Forums Shell Programming and Scripting How to display a message if program hangs(takes too long) Post 302672943 by rbatte1 on Tuesday 17th of July 2012 09:45:45 AM
Old 07-17-2012
Hello mrskittles99,

You could set the script you want to run in the background, capture the process id and then set a timer running. It always feels a bit spaghetti when i do this sort of thing though.

Code:
#!/bin/ksh
echo "`date` Running script2"
script2 &
SCRIPT2PID=$!

timer=0
until [ $timer = 600 -o `ps -fp $SCRIPTPID|wc -l` -ne 1 ]    # Set wait time to 600 seconds or 10 minutes.
do
   sleep 1
   ((timer=$timer+1))
done

if [ `ps -fp $SCRIPTPID|wc -l` -ne 1 ]
then
   kill $SCRIPT2PID
   echo "`date` Script2 can't run right now"
else
   echo "`date` Script2 complete"
fi



I hope that this helps. It may take a bit of trial and error to get the exact process right. Try it with a script2 that just contains a sleep command itself.

Any better suggestions? I would like to know too as I'm not that comfortable with what I've coded above.




Robin
Liverpool/Blackburn
 

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SDL_SetTimer(3) 						 SDL API Reference						   SDL_SetTimer(3)

NAME
SDL_SetTimer - Set a callback to run after the specified number of milliseconds has elapsed. SYNOPSIS
#include "SDL.h" int SDL_SetTimer(Uint32 interval, SDL_TimerCallback callback); CALLBACK
/* Function prototype for the timer callback function */ typedef Uint32 (*SDL_TimerCallback)(Uint32 interval); DESCRIPTION
Set a callback to run after the specified number of milliseconds has elapsed. The callback function is passed the current timer interval and returns the next timer interval. If the returned value is the same as the one passed in, the periodic alarm continues, otherwise a new alarm is scheduled. To cancel a currently running timer, call SDL_SetTimer(0, NULL); The timer callback function may run in a different thread than your main constant, and so shouldn't call any functions from within itself. The maximum resolution of this timer is 10 ms, which means that if you request a 16 ms timer, your callback will run approximately 20 ms later on an unloaded system. If you wanted to set a flag signaling a frame update at 30 frames per second (every 33 ms), you might set a timer for 30 ms (see example below). If you use this function, you need to pass SDL_INIT_TIMER to SDL_Init(). Note: This function is kept for compatibility but has been superseded by the new timer functions SDL_AddTimer and SDL_RemoveTimer which support multiple timers. EXAMPLES
SDL_SetTimer((33/10)*10, my_callback); SEE ALSO
SDL_AddTimer SDL
Tue 11 Sep 2001, 23:01 SDL_SetTimer(3)
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