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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 OSF1

itruns

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

NAME

       itruns - set up files for use by the it command

SYNOPSIS

       /sbin/itruns file [file...] in run-state [, file [file...] in run-state] [,...]

DESCRIPTION

       The  itruns  program  sets  up scripts to be run by it(8).  (These programs are typically used within system configuration and installation
       scripts.)  The itruns command searches for /sbin/it.d/bin/file. If itruns finds the file, it  creates  one  or  more  symbolic  links  from
       /sbin/it.d/run-state.d/file to /sbin/it.d/bin/file.

       The  run-state  argument can be a single run state, or it can be two run states separated by either the word or or the word and. If two run
       states are specified with the or keyword, itruns checks for (and creates, if necessary) a directory whose name combines both run states and
       places  a link in that directory so that the file will be executed when the it program detects either state.  You can collapse two or-sepa-
       rated states into a single expression; for example, 2 or 3 can be expressed as 23. If the and keyword is used, itruns checks for (and  cre-
       ates, if necessary) two separate directories and places a link in each of them so that either state triggers execution of the file indepen-
       dently of the other state.

       If two or more files are specified for a single run-state argument, links are created for all of the files as indicated	by  the  run-state
       argument.

       If  two or more combinations of files and run states are specified as comma-separated expressions, itruns treats each combination individu-
       ally.

RESTRICTIONS

       The itruns command must be executed from the root directory (/). The command finds only files that are located in the /sbin/it.d/bin direc-
       tory.

EXAMPLES

       This  example  sets  up	the doconfig script to be run when the system is booted to run state 2: itruns doconfig in 2 Either of the command
       lines in this example sets up the doconfig and getdate scripts to be run when the system is booted to run state 2 or to run state 3: itruns
       doconfig  getdate  in  2 or 3 itruns doconfig getdate in 23 This example sets up the doconfig script to be run when the system is booted to
       run state 2 and again when the system comes to run state 3, the getdate script to be run only in run state 2, and the getsysname script	to
       be run only in run state 3: itruns doconfig in 2 and 3, getdate in 2, getsysname in 3

SEE ALSO

       Commands: it(8)

																	 itruns(8)
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