Synchronizing four shell scripts to run one after another in unix

Question

I have 4 shell script to generate a file(let\'s say param.txt) which is used by another tool(informatica) and as the tool is done with processing, it deletes param.txt.

Answer 1

Thanks for your valuable suggestions. It did help me to think from other dimension. However I missed to mention that I am using Solaris UNIX where I couldn't find equivalent of flock or similar function. I could have asked team to install one utility but in mean time I found a workaround for this issue.

I read about the mkdir function being atomic in nature where as 'touch' command to create a file is not(still don't have complete explanation on how it works). That means at a time only 1 script can create/delete directory 'lockdir' out of 4 and other 3 has to wait.

while true;
do 
if mkdir "$lockdir"; then
   < create param file >

break;
fi
    Sleep 30
done