Provided by: openafs-client_1.6.15-1ubuntu1.1_amd64 
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.