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/*
* Copyright (c) 2001-2002 Chris D. Faulhaber
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR THE VOICES IN HIS HEAD BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* $FreeBSD$
*/
#include <sys/types.h>
#include <sys/acl.h>
#include <sys/stat.h>
#include <err.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include "setfacl.h"
/* set the appropriate mask the given ACL's */
int
set_acl_mask(acl_t *prev_acl)
{
acl_entry_t entry;
acl_t acl;
acl_tag_t tag;
int entry_id;
entry = NULL;
/*
* ... if a mask entry is specified, then the permissions of the mask
* entry in the resulting ACL shall be set to the permissions in the
* specified ACL mask entry.
*/
if (have_mask)
return (0);
acl = acl_dup(*prev_acl);
if (acl == NULL)
err(1, "acl_dup() failed");
if (n_flag == 0) {
/*
* If no mask entry is specified and the -n option is not
* specified, then the permissions of the resulting ACL mask
* entry shall be set to the union of the permissions
* associated with all entries which belong to the file group
* class in the resulting ACL
*/
if (acl_calc_mask(&acl)) {
warn("acl_calc_mask() failed");
acl_free(acl);
return (-1);
}
} else {
/*
* If no mask entry is specified and the -n option is
* specified, then the permissions of the resulting ACL
* mask entry shall remain unchanged ...
*/
entry_id = ACL_FIRST_ENTRY;
while (acl_get_entry(acl, entry_id, &entry) == 1) {
entry_id = ACL_NEXT_ENTRY;
if (acl_get_tag_type(entry, &tag) == -1)
err(1, "acl_get_tag_type() failed");
if (tag == ACL_MASK) {
acl_free(acl);
return (0);
}
}
/*
* If no mask entry is specified, the -n option is specified,
* and no ACL mask entry exists in the ACL associated with the
* file, then write an error message to standard error and
* continue with the next file.
*/
warnx("warning: no mask entry");
acl_free(acl);
return (0);
}
acl_free(*prev_acl);
*prev_acl = acl_dup(acl);
acl_free(acl);
return (0);
}
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