A wrapper is another script to "wrap around" existing script/s to do any of the following:
1) To control the execution of the main script/s (set environment variables, set aliases, etc).
2) To provide more information about the execution of the base script/s (display the time of execution, dump output to a log file, display the return code of the execution of the base script/s, etc).
3) Create a single point of entry to manipulate multiple scripts (For example, a simple script that displays Menu Options that will execute other scripts can be considered as a wrapper script).
A wrapper script is a script that has got a bunch of other scripts and commands in them.
A normal script will have stuff like:
ls
cp
while true
date
echo
A wrapper script will refer to other scripts:
/admin/check_precesses.sh
if [ $? != 0 ]
then
echo "Checking of processes failed"
exit 7
else
/admin/report_processes.sh
fi
Wrapper scripts are also used to capture all output of another script or scripts to a log file.
A wrapper script is a master script which controls the execution of other scripts.
For example-
You have some scripts called A.sh, B.sh and so on...
Now you have to run this scripts for a particular task one after another. Manually it would be a cumbersome task. So what you can do is write a wrapper around this scripts (also a script) which controls the execution of this scripts without the need to run them manually.
It all depends upon the circumstances.
