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Instead of checking the file size you should check if the file is open. You can use the fuser utility to do that:


f=/tmp/x.x
test ! -f $f && echo file not found && exit
c=`fuser -f $f 2>&1 |...

echo waiting ...
while true
do
date
test `date '+%H:%M'` == "12:00" && echo time is up && break
test ! -f /tmp/x.x && echo file not found, sleeping ... && sleep 10
...

Please provide an example.

$ sed -e 's/, *,/,NIS,/g' -e 's/, *$/,NIS/g' <<INPUT
> MARKET,STORE,STORE NAME,WEEK1,WEEK2
> MARKET,STORE1,STORENAM1, 000000003.99,
> MARKET,STORE1,STORENAM2,NH,NH
> MARKET,STORE1,STORENAM3,...

$ awk -F, '$4 == "" {print $1 "," $2 "," $3 ",NIS," $5} $4 != "" {print $0}' <<INPUT
> MARKET,STORE,STORE NAME,WEEK1,WEEK2
> MARKET,STORE1,STORENAM1, 000000003.99,
> MARKET,STORE1,STORENAM2,NH,NH...

This solution is better as it works for decimals as well:


$ x=a; printf "%g" $x >/dev/null 2>&1; if [ $? -eq 0 ]; then echo is number; else echo not number; fi
not number
$ x=9a; printf "%g"...

$
$ x=1; if [ "`expr $x - $x 2>/dev/null`" == "0" ]; then echo is number; else echo not number; fi
is number
$ x=-1; if [ "`expr $x - $x 2>/dev/null`" == "0" ]; then echo is number; else echo not...

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