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Full Discussion: A script for shutdown
Top Forums UNIX for Dummies Questions & Answers A script for shutdown Post 302085978 by Corona688 on Monday 21st of August 2006 01:18:19 PM
Old 08-21-2006
The script will be something like:

Code:
#!/bin/sh

exec /sbin/poweroff

i.e. whatever way you shut down the server as root.

Call it turnoff.sh and put it in /sbin/ . Then make sure it's owned by the user root and the group wheel(or whatever other group you want that's a group of people you want to be able to turn off the machine).
Code:
# cp turnoff.sh /sbin/turnoff.sh
# chown root:wheel /sbin/turnoff.sh

Now give it these permissions:
Code:
# chmod 550 /sbin/turnoff.sh
# chmod u+s /sbin/turnoff.sh

As in, only it's owner and it's group can read or execute it, and it has the setuid bit.

That way, people who run the file will run it with root permissions. Yes, it has to be carefully controlled. Setuid is considered dangerous.

Technically, you could do the exact same things to the file itself, but I think it's better to make it a script that won't be replaced every time you upgrade these things.
 

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LEARN ABOUT SUNOS

fbtab

logindevperm(4) 						   File Formats 						   logindevperm(4)

NAME

       logindevperm, fbtab - login-based device permissions

SYNOPSIS

       /etc/logindevperm

DESCRIPTION

       The  /etc/logindevperm  file  contains  information  that is used by login(1) and ttymon(1M) to change the owner, group, and permissions of
       devices upon logging into or out of a console device. By default, this file contains lines for the keyboard, mouse, audio, and frame buffer
       devices.

       The owner of the devices listed in /etc/logindevperm is set to the owner of the console by login(1). The group of the devices is set to the
       owner's group specified in /etc/passwd. The permissions are set as specified in /etc/logindevperm.

       Fields are separated by TAB and/or SPACE characters. Blank lines and comments can appear anywhere in the file; comments start with a  hash-
       mark, ` # ', and continue to the end of the line.

       The first field specifies the name of a console device (for example, /dev/console). The second field specifies the permissions to which the
       devices in the device_list field (third field) will be set.  These permissions must be expressed in octal format.  For  example,  O774.	 A
       device_list  is	a  colon-separated list of device names.  Note that a device name must be a /dev link.	A device entry that is a directory
       name and ends with "/*" specifies all entries in the directory (except "." and ".."). For example, "/dev/fbs/*" specifies all frame  buffer
       devices.

       Once the devices are owned by the user, their permissions and ownership can be changed using chmod(1) and chown(1), as with any other user-
       owned file.

       Upon logout the owner and group of these devices will be reset by ttymon(1M) to owner root and root's group  as	specified  in  /etc/passwd
       (typically other). The permissions are set as specified in the /etc/logindevperm file.

FILES

       /etc/passwd     File that contains user group information.

SEE ALSO

       chmod(1), chown(1), login(1), ttymon(1M), passwd(4)

NOTES

       /etc/logindevperm provides a superset of the functionality provided by /etc/fbtab in SunOS 4.x releases.

SunOS 5.10							    22 Oct 2003 						   logindevperm(4)
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