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/*
* Copyright (c) 2001 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 <stdio.h>
#include "setfacl.h"
static int merge_user_group(acl_entry_t *entry, acl_entry_t *entry_new);
static int
merge_user_group(acl_entry_t *entry, acl_entry_t *entry_new)
{
acl_permset_t permset;
int have_entry;
uid_t *id, *id_new;
have_entry = 0;
id = acl_get_qualifier(*entry);
if (id == NULL)
err(1, "acl_get_qualifier() failed");
id_new = acl_get_qualifier(*entry_new);
if (id_new == NULL)
err(1, "acl_get_qualifier() failed");
if (*id == *id_new) {
/* any other matches */
if (acl_get_permset(*entry, &permset) == -1)
err(1, "acl_get_permset() failed");
if (acl_set_permset(*entry_new, permset) == -1)
err(1, "acl_set_permset() failed");
have_entry = 1;
}
acl_free(id);
acl_free(id_new);
return (have_entry);
}
/*
* merge an ACL into existing file's ACL
*/
int
merge_acl(acl_t acl, acl_t *prev_acl)
{
acl_entry_t entry, entry_new;
acl_permset_t permset;
acl_t acl_new;
acl_tag_t tag, tag_new;
int entry_id, entry_id_new, have_entry;
if (acl_type == ACL_TYPE_ACCESS)
acl_new = acl_dup(prev_acl[ACCESS_ACL]);
else
acl_new = acl_dup(prev_acl[DEFAULT_ACL]);
if (acl_new == NULL)
err(1, "acl_dup() failed");
entry_id = ACL_FIRST_ENTRY;
while (acl_get_entry(acl, entry_id, &entry) == 1) {
entry_id = ACL_NEXT_ENTRY;
have_entry = 0;
/* keep track of existing ACL_MASK entries */
if (acl_get_tag_type(entry, &tag) == -1)
err(1, "acl_get_tag_type() failed - invalid ACL entry");
if (tag == ACL_MASK)
have_mask = 1;
/* check against the existing ACL entries */
entry_id_new = ACL_FIRST_ENTRY;
while (have_entry == 0 &&
acl_get_entry(acl_new, entry_id_new, &entry_new) == 1) {
entry_id_new = ACL_NEXT_ENTRY;
if (acl_get_tag_type(entry, &tag) == -1)
err(1, "acl_get_tag_type() failed");
if (acl_get_tag_type(entry_new, &tag_new) == -1)
err(1, "acl_get_tag_type() failed");
if (tag != tag_new)
continue;
switch(tag) {
case ACL_USER:
case ACL_GROUP:
have_entry = merge_user_group(&entry,
&entry_new);
if (have_entry == 0)
break;
/* FALLTHROUGH */
case ACL_USER_OBJ:
case ACL_GROUP_OBJ:
case ACL_OTHER:
case ACL_MASK:
if (acl_get_permset(entry, &permset) == -1)
err(1, "acl_get_permset() failed");
if (acl_set_permset(entry_new, permset) == -1)
err(1, "acl_set_permset() failed");
have_entry = 1;
break;
default:
/* should never be here */
errx(1, "Invalid tag type: %i", tag);
break;
}
}
/* if this entry has not been found, it must be new */
if (have_entry == 0) {
if (acl_create_entry(&acl_new, &entry_new) == -1) {
acl_free(acl_new);
return (-1);
}
if (acl_copy_entry(entry_new, entry) == -1)
err(1, "acl_copy_entry() failed");
}
}
if (acl_type == ACL_TYPE_ACCESS) {
acl_free(prev_acl[ACCESS_ACL]);
prev_acl[ACCESS_ACL] = acl_new;
} else {
acl_free(prev_acl[DEFAULT_ACL]);
prev_acl[DEFAULT_ACL] = acl_new;
}
return (0);
}
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