02-26-2007
Quote:
Originally Posted by rudo
Hi,
Is it true that if I am not the root I can not select access permissions to a file that I own so that my friend (who also isn't the root) can access that file?
For files you own you can always change the access right. So the answer is no, this is not true.
Quote:
Originally Posted by rudo
And is it true that the only way to accomplish it is to ask the root to "put" my friend into "my" group? Then I could simply set the access rights to the file for members of my group, I think... That is why I am asking you...
If your friend doesn't belong to the same group as you do, you will have to set the access rights in such a way that "others" have access rights to your file.
If you do not want to set permission that wide, you indeed have to ask the system administrator to add your friend to the same group as you are in.
That way you don't need to allow access to "others" but can limit it to your "group".
Just setting the access rights correct for the file might even not be enough. You have to make sure that either "others" or the "group" have the correct access rights on all directories leading to the location of your file.
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NFACCESS(8) System Manager's Manual NFACCESS(8)
NAME
nfaccess - Add access rights to a set of Notesfiles
SYNOPSIS
nfaccess access-right topic [ topic ... ]
DESCRIPTION
Nfaccess simplifies the task of adding an access-right to many notesfiles. The function is somewhat analagous to that of chmod(1).
The access-right specifies a user, group or system and the permissions to be granted. The format is:
<access-right> ::= [<type>:]name=<mode>
<type> ::= {User, user, Group, group, System, system}
<mode> ::= {d, r, w, a, n}+
The type specification can be omitted; when it is omitted, the name is assumed to be a user. The mode is additive. A mode of ``rw'' spec-
ifies read and write. The ``n'' mode specifies null access.
The new access right is inserted in each specified notesfiles access list. If the user/group/system already has an entry, the old entry is
replaced with the new entry.
All users are allowed to run this program. The changes are only applied to notesfiles for which the executing user is a director.
This program lives in the notesfile utility directory, typically ``/usr/spool/notes/.utilities''.
To automatically add specific access-rights to newly created notesfiles, the file ``/usr/spool/notes/.utilities/access-template'' is use-
ful. If it exists, the file contains lines of acces-rights which are added to each notesfile as it is created. If several people share
the administration of the notesfile system, each can be added to the access-lists of newly created notesfiles by placing appropriate lines
in this file.
EXAMPLES
nfaccess essick=drw /usr/spool/notes/*
nfaccess group:srg=rw this that other
nfaccess user:kolstad=rw mynotes
In the first example, user `essick' is given director/read/write access to all the notesfiles in /usr/spool/notes. Any permissions (or
restrictions) he might have had before are overridden. The second example gives group `srg' read/write access to notesfiles `this', `that'
and `other'. In the final example, user `kolstad' is given read/write access to the notesfile `mynotes'.
BUGS
Entries can not be removed from the access list with this program.
Entries can not merely be augmented (``just add write permission'') with this program.
FILES
/etc/passwd for the users name
/etc/group for the users group
/usr/spool/notes the default notesfile data base
SEE ALSO
mknf(8), notes(1), nfcomment(3),
The Notesfile Reference Manual
AUTHORS
Ray Essick (uiucdcs!essick, essick%uiuc@csnet-relay.arpa)
University of Illinois at Urbana-Champaign
Urbana, IL
University of Illinois NFACCESS(8)