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.