Shell Programming and Scripting

Hi All,

I need a script which does,

script check a file every 15 second, if file not exist, it will create a log file.
how can I do it ?

thanks

Alice

Check this post

https://www.unix.com/shell-programming-and-scripting/19676-loop-through-files-directory.html

Minor modifications would be needed tho'.

Vino

hi,

how abt this

while [ 1 ]
do
if [ ! -f <filename> ]
then
touch <filename>.log
fi
sleep 15
done

-------------------

You dont actually need the if..fi. Just an improvement over your solution.

Code:

#! /bin/sh
while true
do
[[ ! -f <filename> ]] && touch <filename>.log
sleep 15
done

Vino

for the solution offered, the short form of the if test statement suffices ... however, the if-then-fi form actually gives you more flexibility when you have complex requirements for the conditions you're testing for ... especially for somebody just starting out on scripting, i would strongly advise scripters to stick to the if-then-fi form until more proficient or unless only looking for a very short script ... the if-then-fi form is also a lot more readily understandable than the short "[cond]" form ...

Code:

if [ cond ]
then
    while [ cond ]
    do
        if [ cond ]
        then
              commands
        else
             for stuff in list
             do
                  commands
             done
        fi
    done
else
     commands
fi