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Global variable in for loop (BASH)

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Top Forums Programming Global variable in for loop (BASH)
# 8  
Old 01-20-2014
Quote:
Originally Posted by shadyuk
Hello,

I'm trying to read the variable "pause" from a for loop without luck. The function is dependant on the outcome of the test within the loop. If i run this, pause is always 0 within the function. Any ideas?
The pause you're setting in the for loop is not the same variable as the one you're checking in the function - since it's in a sub-shell.
Code:
pause=0
users=1

(for (( ; ; ))
do
   speed=`cat speed.log`
   if [ "$speed" -lt 10 ]; then
      pause=1
   else
      pause=0
   fi
sleep 30
done) &

function one_user () {
   local user=$1   
   while [[ "$pause" = 1 ]]; do
      echo pausing script
      sleep 10
   done
   # else continue
}

for (( user = 1; user <= $users; user++ )); do
  one_user $user &
done


Also, be aware that you're generating orphaned processes every time your script runs.
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