On 8/11/2013 2:53 AM, Chris Morley wrote: > It seems the only way to have shutdown not require the user to enter the > password, > would be to call a script with admin rights. > > I am wondering if this is something we could add to linuxcnc's make file to > add this script and > setuid it for admin rights. > I'd hate to add a button to Gscreen that require the integrator to have to > add a guru script to > make it work (even if it is fairly easy). > > reference link > http://stackoverflow.com/questions/8089471/remotely-shutdown-restart-a-linux-machine-without-password
As indicated in your reference link, setup an sudoers entry that allows the user in question to run the shutdown command and it will work (and be reasonably safe). Configure sudoers for NOPASSWD for this entry if you don't want to be prompted for the root password. If you want to add something to the LinuxCNC make file, a simple C program that executes the shutdown command would be fairly simple to write. It could be setuid to run as root by the same "sudo make setuid" process as the other LinuxCNC commands that need root permissions. -- Charles Steinkuehler [email protected]
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