04-28-2005
Perhaps you can use UNIX ACL's (Access Control List). I'm not sure if it's in any UNIX other than AIX or HP-UX, but others on this board may be able to help there. I normally wouldn't use ACL's, but for such a situation (where you want to hide files, or deny read access to files, for one user) it may be a good solution. ACL's are exception-bases permissions on files and directories that pre-empt normal permissions. On AIX, you can do a man on the commands acledit, aclget, and aclput. On HP-UX, you can do a man on the commands chacl, getacl, lsacl, and setacl.
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LEARN ABOUT DEBIAN
dpns-getacl
DPNS-GETACL(1) DPNS User Commands DPNS-GETACL(1)
NAME
dpns-getacl - get DPNS directory/file access control lists
SYNOPSIS
dpns-getacl [-a] [-d] path...
DESCRIPTION
dpns-getacl gets the Access Control List associated with a DPNS directory/file. For each path, it displays the file name, owner, the
group, and the Access Control List (ACL) if present. If a directory has a default ACL, dpns-getacl also displays the default ACL. Regular
files cannot have default ACLs.
The output looks like:
# file: filename
# owner: username
# group: groupname
user::perm
user:uid:perm
group::perm
group:gid:perm
mask:perm
other:perm
default:user::perm
default:user:uid:perm
default:group::perm
default:group:gid:perm
default:mask:perm
default:other:perm
The first "user" entry gives the permissions granted to the owner of the file. The following "user" entries show the permissions granted
to specific users, they are sorted in ascending order of uid. The first "group" entry gives the permissions granted to the group owner of
the file. The following "group" entries show the permissions granted to specific groups, they are sorted in ascending order of gid. The
"mask" entry is the maximum permission granted to specific users or groups. It does not affect the "owner" and "other" permissions. The
"mask" entry must be present if there are specific "user" or "group" entries. "default" entries associated with a directory are inherited
as access ACL by the files or sub-directories created in that directory. The umask is not used. Sub-directories also inherit the default
ACL as default ACL. As soon as there is one default ACL entry, the 3 default ACL base entries (default user, default group, default other)
must be present.
The entry processing conforms to the Posix 1003.1e draft standard 17.
path specifies the DPNS pathname. If path does not start with /, it is prefixed by the content of the DPNS_HOME environment variable.
uid is displayed as the username if known else as the numeric id.
gid is displayed as the groupname if known else as the numeric id.
perm is expressed as a combination of characters rwx-
OPTIONS
-a only display the access ACL.
-d only display the default ACL.
EXAMPLES
dpns-getacl /dpm/dteam/test/file.log/d2
# file: /dpm/dteam/test/file.log/d2
# owner: baud
# group: c3
user::rwx
group::r-x #effective:r-x
other::r-x
default:user::rwx
default:group::r-x
default:other::r-x
EXIT STATUS
This program returns 0 if the operation was successful or >0 if the operation failed.
SEE ALSO
Castor_limits(4), dpns_chmod(3), dpns_chown(3)
AUTHOR
LCG Grid Deployment Team
DPNS
$Date: 2005/03/02 08:32:12 $ DPNS-GETACL(1)