I have a VMWare VM that directly accesses some disks.  In order to run (without running vmware as su which has its own problems) I need to change the ownership of the devices.  I've done this manually using Nemo, so I know what needs to be performed.Writing a shell script to do this, I wrotechown john:john /dev/disk/by-id/blahblah  /dev/anotherblah  /dev/lastoneblahI saved it as a file drive-owner, set the execute bit, then in a root shell changed its owner to root and set the +s special mode flag.The result, according to ls, is -rwsr-sr-x.If I run that from a normal (non-root) shell, I get errors from chown, Operation not permitted.It runs without complaint from a root shell.I seem to be missing the part that runs the script as root automatically.  I thought that was the purpose and function of the setuid permission, and +s is how to specify it.What am I missing?
permissions of script to change permissions?
shell script;permissions