03-02-2009
You may also want to investigate ACL - access control lists. They provide very fine-grained control over accessing any file/device - ie., everybody but the username jmc can access this file/device. see: man chacl.
As with SELinux it may be painful to implement if this is implemented on a lot of different machines, and it will be a huge amount of work.
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lock(9s) lock(9s)
NAME
lock - General: Contains complex lock-specific information
SYNOPSIS
The lock data structure is an opaque data structure; that is, its associated members are referenced and manipulated by the operating system
and not by the user of the complex lock mechanism. Therefore, this reference page omits a description of the lock data structure's associ-
ated members.
DESCRIPTION
The lock data structure is the complex lock structure that contains complex lock-specific information. A kernel module writer using the
complex lock method declares a pointer to a lock data structure and passes its address to the associated lock routines.
NOTES
The header file <lock.h> shows typedef statements that assign the alternate name lock_data_t for the complex lock structure and lock_t for
a pointer to the complex lock structure.
FILES
SEE ALSO
Routines: lock_done(9r), lock_init(9r), lock_read(9r), lock_terminate(9r), lock_try_read(9r), lock_try_write(9r), lock_write(9r)
Data Structures: slock(9s)
lock(9s)