Korn shell (file check and creation function)
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You could easily add a second parameter in the following code to substitute the chmod 777 for a different, probably less generous, set of file permissions, or hard-code the change.
#!/usr/bin/ksh
#Author: Steve Callaway
function check_file
{
if [[ -e $1 ]]
then
echo $1 found
else
touch $1
chmod 777 $1
fi
return
}