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Full Discussion: Can I prevent a user from changing the permissions on their home directory.
Top Forums UNIX for Dummies Questions & Answers Can I prevent a user from changing the permissions on their home directory. Post 302087019 by DanL on Tuesday 29th of August 2006 10:14:15 AM
Old 08-29-2006
Can I prevent a user from changing the permissions on their home directory.
Hello All,

I have a new HPUX system going into production and it will be used by 2 projects. One of the contract requirements is the 2 groups can not have access to the others work or data. I believe I have the system pretty well locked up using groups and permissions and selective mounting of RAID partitions. However the one problem I see that I can not figure out:

Is it possible to prevent a user from changing the permissions on their home directory?

If I set the permissions at 750 the other group can not access the files. However if the user/owner decides to change them to anything more laxed, like 755, then the other group will have access to any proprietary data.

I realize that changing the permissions will most likely be a deliberate act, but I do have a couple of user that are rather lax in following the rules.

Thanks in advance for your responses.

Dan L.
 

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LEARN ABOUT DEBIAN

cgcreate

CGCREATE(1)							 libcgroup Manual						       CGCREATE(1)

NAME

       cgcreate - create new cgroup(s)

SYNOPSIS

       cgcreate [-h] [-s] [-t <tuid>:<tgid>] [-a <agid>:<auid>] [-f mode] [-d mode] -g <controllers>:<path> [-g ...]

DESCRIPTION

       The command creates new cgroup(s) defined by the options -g.

       -a <agid>:<auid>
	      defines  the  name of the user and the group which own the rest of the defined control group's files. These users are allowed to set
	      subsystem parameters and create subgroups.  The default value is the same as has the parent cgroup.

       -d, --dperm=mode
	      sets the permissions of a control groups directory.  The permissions needs to be specified as octal numbers e.g.	-d 775.

       -f, --fperm=mode
	      sets the permissions of the control groups parameters.  The permissions needs to be specified as octal numbers e.g.   -f	775.   The
	      value  is  not  used as given because the current owner's permissions are used as an umask (so 777 will set group and others permis-
	      sions to the owners permissions).

       -g <controllers>:<path>
	      defines control groups to be added.  controllers is a list of controllers and path is the relative path to  control  groups  in  the
	      given controllers list. This option can be specified multiple times.

       -h, --help
	      display this help and exit

       -s, --tperm=mode
	      sets  the  permissions  of  the control group tasks file.  The permissions needs to be specified as octal numbers e.g.  -f 775.  The
	      value is not used as given because the current owner's permissions are used as an umask (so 777 will set group  and  others  permis-
	      sions to the owners permissions).

       -t <tuid>:<tgid>
	      defines  the  name of the user and the group, which owns tasks file of the defined control group. I.e. this user and members of this
	      group have write access to the file.  The default value is the same as has the parent cgroup.

FILES

SEE ALSO

       cgrules.conf (5) cgexec (1) cgclassify (1)

Linux								    2009-03-15							       CGCREATE(1)
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