43960f159d
from files and directories, and setfacl sets ACLs on files and directories. Submitted by: jedgar Obtained from: TrustedBSD Project
156 lines
4.0 KiB
C
156 lines
4.0 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 <string.h>
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#include <sysexits.h>
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#include "setfacl.h"
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/* remove ACL entries from an ACL */
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int
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remove_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 carried_error, i;
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carried_error = 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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/* find and delete the entry */
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for (i = 0; i < acl->acl_cnt; i++) {
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if (acl->acl_entry[i].ae_tag == ACL_MASK)
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have_mask++;
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if (acl_delete_entry(acl_new, &acl->acl_entry[i]) == -1) {
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carried_error++;
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warnx("cannot remove non-existent acl entry");
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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[0]);
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prev_acl[0] = acl_new;
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} else {
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acl_free(prev_acl[1]);
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prev_acl[1] = acl_new;
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}
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if (carried_error)
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return -1;
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return 0;
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}
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/* remove default entries */
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int
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remove_default(acl_t *prev_acl)
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{
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if (prev_acl[1]) {
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bzero(prev_acl[1], sizeof(struct acl));
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prev_acl[1]->acl_cnt = 0;
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} else {
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warn("cannot remove default ACL");
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return -1;
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}
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return 0;
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}
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/* remove extended entries */
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void
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remove_ext(acl_t *prev_acl)
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{
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acl_t acl_new, acl_old;
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acl_perm_t group_perm, mask_perm;
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int have_mask_entry, i;
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if (acl_type == ACL_TYPE_ACCESS)
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acl_old = acl_dup(prev_acl[0]);
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else
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acl_old = acl_dup(prev_acl[1]);
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if (!acl_old)
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err(EX_OSERR, "acl_dup() failed");
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group_perm = mask_perm = 0;
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have_mask_entry = 0;
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acl_new = acl_init(ACL_MAX_ENTRIES);
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if (!acl_new)
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err(EX_OSERR, "%s", "acl_init() failed");
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/* only save the default user/group/other entries */
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for (i = 0; i < acl_old->acl_cnt; i++)
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switch(acl_old->acl_entry[i].ae_tag) {
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case ACL_USER_OBJ:
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acl_new->acl_entry[0] = acl_old->acl_entry[i];
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break;
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case ACL_GROUP_OBJ:
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acl_new->acl_entry[1] = acl_old->acl_entry[i];
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group_perm = acl_old->acl_entry[i].ae_perm;
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break;
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case ACL_OTHER_OBJ:
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acl_new->acl_entry[2] = acl_old->acl_entry[i];
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break;
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case ACL_MASK:
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mask_perm = acl_old->acl_entry[i].ae_perm;
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have_mask_entry = 1;
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break;
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default:
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break;
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}
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/*
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* If the ACL contains a mask entry, then the permissions associated
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* with the owning group entry in the resulting ACL shall be set to
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* only those permissions associated with both the owning group entry
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* and the mask entry of the current ACL.
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*/
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if (have_mask_entry)
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acl_new->acl_entry[1].ae_perm = group_perm & mask_perm;
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acl_new->acl_cnt = 3;
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if (acl_type == ACL_TYPE_ACCESS) {
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acl_free(prev_acl[0]);
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prev_acl[0] = acl_new;
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} else {
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acl_free(prev_acl[1]);
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prev_acl[1] = acl_new;
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}
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have_mask = 0;
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}
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