43960f159d
from files and directories, and setfacl sets ACLs on files and directories. Submitted by: jedgar Obtained from: TrustedBSD Project
114 lines
3.3 KiB
C
114 lines
3.3 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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* $FreeBSD$
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*/
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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 <sysexits.h>
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#include "setfacl.h"
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/* merge acl into existing file's ACL */
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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_t acl_new;
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int blank_acl_user, blank_acl_group, have_entry, i, j;
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struct stat sb;
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blank_acl_user = blank_acl_group = 0;
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if (acl_type == ACL_TYPE_ACCESS)
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acl_new = acl_dup(prev_acl[0]);
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else
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acl_new = acl_dup(prev_acl[1]);
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if (!acl_new)
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err(EX_OSERR, "acl_dup() failed");
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/* step through new ACL entries */
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for (i = 0; i < acl->acl_cnt; i++) {
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have_entry = 0;
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/* oh look, we have an ACL_MASK entry */
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if (acl->acl_entry[i].ae_tag == ACL_MASK)
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have_mask = 1;
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/* check against the existing ACL entries */
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for (j = 0; j < acl_new->acl_cnt && !have_entry; j++) {
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if (acl_new->acl_entry[j].ae_tag ==
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acl->acl_entry[i].ae_tag) {
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switch(acl->acl_entry[i].ae_tag) {
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case ACL_USER_OBJ:
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acl_new->acl_entry[j].ae_perm =
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acl->acl_entry[i].ae_perm;
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acl_new->acl_entry[j].ae_id = sb.st_uid;
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have_entry = 1;
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break;
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case ACL_GROUP_OBJ:
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acl_new->acl_entry[j].ae_perm =
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acl->acl_entry[i].ae_perm;
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acl_new->acl_entry[j].ae_id = sb.st_gid;
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have_entry = 1;
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break;
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default:
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if (acl_new->acl_entry[j].ae_id ==
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acl->acl_entry[i].ae_id) {
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/* any other matches */
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acl_new->acl_entry[j].ae_perm =
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acl->acl_entry[i].ae_perm;
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have_entry = 1;
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}
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break;
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}
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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) {
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if (acl_new->acl_cnt == ACL_MAX_ENTRIES) {
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warn("too many ACL entries");
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acl_free(acl_new);
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return -1;
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}
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acl_new->acl_entry[acl_new->acl_cnt++] =
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acl->acl_entry[i];
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}
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}
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if (acl_type == ACL_TYPE_ACCESS)
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*prev_acl[0] = *acl_new;
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else
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*prev_acl[1] = *acl_new;
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acl_free(acl_new);
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return 0;
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}
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