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Full Discussion: How to make faster loop in multiple directories?
Top Forums Shell Programming and Scripting How to make faster loop in multiple directories? Post 303025257 by rbatte1 on Monday 29th of October 2018 01:42:52 PM
Old 10-29-2018
Might I suggest that you should really use pushd and popd rather than cd in your script. If a directory in your list does not exist, your trailing cd .. will change away to somewhere you don't expect and all subsequent changes will fail.

It might be safer with something like:-
Code:
for A in folder1 folder2 folder3 folder4 folder5 folder6 folder7 folder8 \
folder9 folder10 folder11 folder12 folder13 folder14 folder15
do
   pushd $A >/dev/null 2>&1
   if [ $? -eq 0 ]
   then
      PID=$(cat *.pid)
      if ! [ -n "$PID" -a -e /proc/$PID ]
      then
         /home/boris/public_html/run.sh $A
      else
          echo "process exists, exit now!"
          sleep 2
      fi
      popd >/dev/null 2>&1
   else
      echo "Failed to change into directory $A"
   fi
done


Just a few thoughts.

Kind regards,
Robin
This User Gave Thanks to rbatte1 For This Post:
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