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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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dop(8)							      System Manager's Manual							    dop(8)

NAME
dop - Allows a user to execute a privileged program without knowing the root password. The dop command also modifies the action database. SYNOPSIS
/usr/sbin/dop [-n | -N] [ui:] action [args] /usr/sbin/dop -a priv[,priv]... action [ui:]pathspec[,[ui:]pathspec]... /usr/sbin/dop -a priv[,priv]... [ui:]pathspec /usr/sbin/dop -d action /usr/sbin/dop [-w | -W] OPTIONS
Invokes a prompt asking the user if they want to run the command as a user or as root. The root password is required to run as root. Attempts to run the action with the user privileges. Adds new actions to the dop database. Deletes an existing action from the dop data- base. Writes a binary image without changing the source. Updates the actionlist from the dop action file and then executes the -w option, which writes the binary image. OPERANDS
Name of privileged program to invoke Arguments to pass to the application guarded by the privilege. Comma separated privilege list (see sysman dopconfig) The fully qualified path name and arguments for the associated action. When specified by a comma separated pathlist and arguments for multiple user interface domains (ui:), the first ui: argument speci- fied is used as the default. If no action is specified, then the path base name is used. A run-time argument replaces the first occurrence of asterisk as a word (for example *) in a string, or else they are ignored. Path arguments should be quoted per the cur- rent shell. Optional. A user interface domain, typically one of X11, suit, java, menu, cui, or cli. DESCRIPTION
The dop (Division of Privileges) command can execute an action after proper authentication from the privilege database file. For more information, see the Security guide. RESTRICTIONS
You must have root privileges to modify the privileges database. EXAMPLES
The following example will add an action to the AccountManagement privilege. dop -a AccountManagement adduser_script /usr/sbin/adduser The following example runs the action adduser_script for the AccountManagement privilege. dop adduser_script The following example deletes the adduser_script action from the action database. dop -d adduser_script FILES
Executable file. Executable file for adding or deleting permissions for users and or groups. dop database. SEE ALSO
Commands: sysman(8) dop(8)
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