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