mjhjmtu

In How can I change my command to run without superuser privilleges but with the changed limit value?, I found that I can run sleep 100 with changed core file size limit as

sudo sh -c "ulimit -c 1024 && sleep 100"

or better yet with lowered privilleges:

sudo sh -c "ulimit -c 1024 && sudo -u nobody sleep 100"

1. 
   

   How can I write a script named my_ulimit so that it can be called
   by the similar syntax as ulimit of bash but also is a
   chain-loading utility, just like the syntax of
   http://jdebp.eu./Softwares/nosh/guide/ulimit.html

   
   
   

   my_ulimit [-H] [-S] [limits...] next-prog
   

   
   


2. 
   

   More generally, is it possible not just for bash ulimit but also
   for other command which work in a similar way as ulimit, like:

   
   
   

   mywrapper command-name [command-arg] next-prog
   

   
   

The difficult part for me is how to specify and handle the arguments to ulimit, the chain-loaded program name and its arguments, with respect to parameter expansion and word splitting.
Here is my experiment, appreciate any improvement on it

$ cat mywrapper.sh 
#/bin/bash

setup_command="$1"
chained_command="$2"
eval "$setup_command" && sudo -u nobody bash -c "$chained_command"

$ sudo ./mywrapper.sh "ulimit -c 1024" "sleep 100"
^Quit

Thanks.