2 * Copyright (c) 1999 Robert N. M. Watson
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * acl_calc_mask(): POSIX.1e routine to recalculate the mask value
32 #include <sys/types.h>
34 #include <sys/errno.h>
37 #include "acl_support.h"
40 * POSIX.1e ACL semantics:
42 * acl_calc_mask(): calculate an ACL_MASK entry for the ACL, then either
43 * insert into the ACL if there is none already, or replace the existing
44 * one. This will act up if called on a non-POSIX.1e semantics ACL.
47 acl_calc_mask(acl_t *acl_p)
49 acl_perm_t perm_union = ACL_PERM_NONE;
54 /* search for ACL_MASK */
55 for (i = 0; i < acl->acl_cnt; i++)
56 if (acl->acl_entry[i].ae_tag == ACL_MASK)
59 perm_union |= acl->acl_entry[i].ae_perm;
61 if (mask_entry != -1) {
62 /* already have a mask, replace */
63 acl->acl_entry[mask_entry].ae_perm = perm_union;
65 /* must add a new mask */
66 if (acl_add_entry(acl, ACL_MASK, 0, perm_union) == -1)