archie/tcl-dp/library/acl.tcl
2024-05-27 16:13:40 +02:00

59 lines
1.8 KiB
Tcl

# acl.tcl --
#
# Access control list (acl) implementation for Tcl
#
# Copyright (c) 1992-1993 The Regents of the University of California.
# All rights reserved.
#
# Permission is hereby granted, without written agreement and without
# license or royalty fees, to use, copy, modify, and distribute this
# software and its documentation for any purpose, provided that the
# above copyright notice and the following two paragraphs appear in
# all copies of this software.
#
# IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY FOR
# DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT
# OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF THE UNIVERSITY OF
# CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
# THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES,
# INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
# AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
# ON AN "AS IS" BASIS, AND THE UNIVERSITY OF CALIFORNIA HAS NO OBLIGATION TO
# PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
###########################################################################
#
# Add a "plused" item to an acl. Returns new acl
#
proc Acl+ {acl str} {
lappend acl [list 1 $str]
}
###########################################################################
#
# Add a "minused" item to an acl. Returns new ac
#
proc Acl- {acl str} {
lappend acl [list 0 $str]
}
###########################################################################
#
# Check if a string is "allowed" in an acl
#
proc AclCheck {acl str} {
set result 1
foreach elt $acl {
if {[string match [lindex $elt 1] $str] == 1} {
set result [lindex $elt 0]
}
}
return $result
}