Hi,
I have two file in my directory. "catter" file contains "cat ./file". And "file" contails "Hi ashish". I have SUID bit set for catter file. But when a different user in my group runs file catter, shell displays "Permission denied" message.
I just want to know can use of suid bit be... (3 Replies)
Hi
Senario: I have previleges to edit a file F but User B does not have sufficient privs to edit it.
In order for B to edit it I tried an indirect way. I created a script to edit F and SUID this script so that B can execute it with the privs of me. But this is not working . can some one help... (3 Replies)
Hello,
I would like to run gedit as root while logged into my regular user account. When I try to launch gedit from the command line as super user, I get this message:
Gtk-WARNING **: cannot open display:
Any suggestions or word arounds? It would make my life a lot simpler to edit files... (8 Replies)
Are the programs written on schedulers ,thread library , process management, memory management, et al called systems programs ? How are they different from the programs that implement functions like open() , printf() , scanf() , read() .. they have a prefix sys_open, sys_close, sys_read etc , right... (1 Reply)
How do check the programs that the actual user of the computer installed. I do not care at all about the default programs that came with your distro of Linux, I only want the user installed programs. (1 Reply)
Hello
My system is Debian-503-amd64. After I installed the "lpr" package, I found that some files with SUID bit come from this package. As:
ls -l /usr/bin/lp*
....
-rwsr-sr-x 1 root lp 31800 2008-05-20 /usr/bin/lpq
-rwsr-sr-x 1 root lp 28504 2008-05-20 /usr/bin/lpr
-rwsr-sr-x 1... (1 Reply)
want to create a user account for each of the key programs installed on my debian server. For example, for the following programs:
Tomcat Nginx Supervisor PostgreSQL
This seems to be recommended based on my reading online. However, I want to restrict these user accounts as much as possible,... (3 Replies)
SUID works for shell scripts (bash)??
I'm user user1 need to execute a shell script (script.sh) which is owned by user2.-rwsrwxrwx 1 user2 aduser 3518 Aug 21 05:33 script.shOnly user2 has write privileges to write/copy a file in directory /dir1/subdir. Hence SUID bit permissions are set to... (8 Replies)
I had a question in my test which asked where suppose user B has a program with 's' bit set. Can user A run this program and gain root privileges in any way?
I suppose not as the suid program run with privileges of owner and this program will run with B's privileges and not root. (1 Reply)
Discussion started by: syncmaster
1 Replies
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fs_setcell
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)