75 lines
2.3 KiB
C
75 lines
2.3 KiB
C
/*-
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* Copyright (c) 1999 Robert N. M. Watson
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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/*
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* acl_calc_mask(): POSIX.1e routine to recalculate the mask value
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*/
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#include <sys/types.h>
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#include <sys/acl.h>
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#include <sys/errno.h>
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#include <string.h>
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#include "acl_support.h"
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/*
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* POSIX.1e ACL semantics:
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*
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* acl_calc_mask(): calculate an ACL_MASK entry for the ACL, then either
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* insert into the ACL if there is none already, or replace the existing
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* one.
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*/
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int
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acl_calc_mask(acl_t *acl_p)
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{
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acl_perm_t perm_union = ACL_PERM_NONE;
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acl_t acl = *acl_p;
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int mask_entry = -1;
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int i;
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if (!acl_posix1e(acl))
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return (0);
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/* search for ACL_MASK */
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for (i = 0; i < acl->acl_cnt; i++)
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if (acl->acl_entry[i].ae_tag == ACL_MASK)
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mask_entry = i;
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else
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perm_union |= acl->acl_entry[i].ae_perm;
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if (mask_entry != -1) {
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/* already have a mask, replace */
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acl->acl_entry[mask_entry].ae_perm = perm_union;
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} else {
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/* must add a new mask */
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if (acl_add_entry(acl, ACL_MASK, 0, perm_union) == -1)
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return (-1);
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}
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return (0);
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}
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