FS_SETCELL(1)						       AFS Command Reference						     FS_SETCELL(1)

NAME

       fs_setcell - Configures permissions for setuid programs from specified cells

SYNOPSIS

       fs setcell -cell <cell name>+ [-suid] [-nosuid] [-help]

       fs setce -c <cell name>+ [-s] [-n] [-h]

DESCRIPTION

       The fs setcell command sets whether the Cache Manager allows programs (and other executable files) from each cell named by the -cell
       argument to run with setuid permission. By default, the Cache Manager allows programs from its home cell to run with setuid permission, but
       not programs from any foreign cells. A program belongs to the same cell as the file server machine that houses the volume in which the
       program's binary file resides, as specified in the file server machine's /etc/openafs/server/ThisCell file. The Cache Manager determines
       its own home cell by reading the /etc/openafs/ThisCell file at initialization.

       To enable programs from each specified cell to run with setuid permission, include the -suid flag. To prohibit programs from running with
       setuid permission, include the -nosuid flag, or omit both flags.

       The fs setcell command directly alters a cell's setuid status as recorded in kernel memory, so rebooting the machine is unnecessary.
       However, non-default settings do not persist across reboots of the machine unless the appropriate fs setcell command appears in the
       machine's AFS initialization file.

       To display a cell's setuid status, issue the fs getcellstatus command.

CAUTIONS

       AFS does not recognize effective UID: if a setuid program accesses AFS files and directories, it does so using the current AFS identity of
       the AFS user who initialized the program, not of the program's owner.  Only the local file system recognizes effective UID.

       Only members of the system:administrators group can turn on the setuid mode bit on an AFS file or directory.

       When the setuid mode bit is turned on, the UNIX "ls -l" command displays the third user mode bit as an "s" instead of an "x". However, the
       "s" does not appear on an AFS file or directory unless setuid permission is enabled for the cell in which the file resides.

OPTIONS

       -cell <cell name>+
	   Names each cell for which to set setuid status. Provide the fully qualified domain name, or a shortened form that disambiguates it from
	   the other cells listed in the local /etc/openafs/CellServDB file.

       -suid
	   Allows programs from each specified cell to run with setuid privilege. Provide it or the -nosuid flag, or omit both flags to disallow
	   programs from running with setuid privilege.

       -nosuid
	   Prevents programs from each specified cell from running with setuid privilege. Provide it or the -suid flag, or omit both flags to
	   disallow programs form running with setuid privilege.

       -help
	   Prints the online help for this command. All other valid options are ignored.

EXAMPLES

       The following command enables executable files from the State University cell to run with setuid privilege on the local machine:

	  % fs setcell -cell stateu.edu -suid

PRIVILEGE REQUIRED

       The issuer must be logged in as the local superuser root.

SEE ALSO

       fs_getcellstatus(1)

COPYRIGHT

       IBM Corporation 2000. <http://www.ibm.com/> All Rights Reserved.

       This documentation is covered by the IBM Public License Version 1.0.  It was converted from HTML to POD by software written by Chas
       Williams and Russ Allbery, based on work by Alf Wachsmann and Elizabeth Cassell.

OpenAFS 							    2012-03-26							     FS_SETCELL(1)