114 lines
3.2 KiB
C
114 lines
3.2 KiB
C
/*
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* Copyright (c) 2001-2002 Chris D. Faulhaber
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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 THE VOICES IN HIS HEAD BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/types.h>
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#include <sys/acl.h>
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#include <sys/stat.h>
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#include <err.h>
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include "setfacl.h"
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/* set the appropriate mask the given ACL's */
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int
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set_acl_mask(acl_t *prev_acl)
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{
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acl_entry_t entry;
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acl_t acl;
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acl_tag_t tag;
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int entry_id;
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entry = NULL;
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/*
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* ... if a mask entry is specified, then the permissions of the mask
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* entry in the resulting ACL shall be set to the permissions in the
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* specified ACL mask entry.
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*/
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if (have_mask)
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return (0);
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acl = acl_dup(*prev_acl);
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if (acl == NULL)
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err(1, "acl_dup() failed");
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if (n_flag == 0) {
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/*
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* If no mask entry is specified and the -n option is not
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* specified, then the permissions of the resulting ACL mask
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* entry shall be set to the union of the permissions
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* associated with all entries which belong to the file group
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* class in the resulting ACL
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*/
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if (acl_calc_mask(&acl)) {
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warn("acl_calc_mask() failed");
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acl_free(acl);
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return (-1);
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}
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} else {
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/*
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* If no mask entry is specified and the -n option is
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* specified, then the permissions of the resulting ACL
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* mask entry shall remain unchanged ...
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*/
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entry_id = ACL_FIRST_ENTRY;
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while (acl_get_entry(acl, entry_id, &entry) == 1) {
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entry_id = ACL_NEXT_ENTRY;
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if (acl_get_tag_type(entry, &tag) == -1)
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err(1, "acl_get_tag_type() failed");
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if (tag == ACL_MASK) {
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acl_free(acl);
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return (0);
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}
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}
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/*
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* If no mask entry is specified, the -n option is specified,
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* and no ACL mask entry exists in the ACL associated with the
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* file, then write an error message to standard error and
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* continue with the next file.
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*/
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warnx("warning: no mask entry");
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acl_free(acl);
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return (0);
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}
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acl_free(*prev_acl);
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*prev_acl = acl_dup(acl);
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acl_free(acl);
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return (0);
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}
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