174 lines
4.2 KiB
C
174 lines
4.2 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 <string.h>
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#include "setfacl.h"
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/*
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* remove ACL entries from an ACL
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*/
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int
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remove_acl(acl_t acl, acl_t *prev_acl, const char *filename)
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{
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acl_entry_t entry;
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acl_t acl_new;
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acl_tag_t tag;
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int carried_error, entry_id, acl_brand, prev_acl_brand;
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carried_error = 0;
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acl_get_brand_np(acl, &acl_brand);
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acl_get_brand_np(*prev_acl, &prev_acl_brand);
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if (branding_mismatch(acl_brand, prev_acl_brand)) {
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warnx("%s: branding mismatch; existing ACL is %s, "
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"entry to be removed is %s", filename,
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brand_name(prev_acl_brand), brand_name(acl_brand));
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return (-1);
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}
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carried_error = 0;
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acl_new = acl_dup(*prev_acl);
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if (acl_new == NULL)
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err(1, "%s: acl_dup() failed", filename);
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tag = ACL_UNDEFINED_TAG;
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/* find and delete the entry */
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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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if (acl_get_tag_type(entry, &tag) == -1)
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err(1, "%s: acl_get_tag_type() failed", filename);
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if (tag == ACL_MASK)
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have_mask++;
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if (acl_delete_entry(acl_new, entry) == -1) {
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carried_error++;
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warnx("%s: cannot remove non-existent ACL entry",
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filename);
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}
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}
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acl_free(*prev_acl);
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*prev_acl = acl_new;
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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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int
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remove_by_number(uint entry_number, acl_t *prev_acl, const char *filename)
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{
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acl_entry_t entry;
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acl_t acl_new;
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acl_tag_t tag;
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int carried_error, entry_id;
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uint i;
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carried_error = 0;
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acl_new = acl_dup(*prev_acl);
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if (acl_new == NULL)
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err(1, "%s: acl_dup() failed", filename);
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tag = ACL_UNDEFINED_TAG;
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/*
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* Find out whether we're removing the mask entry,
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* to behave the same as the routine above.
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*
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* XXX: Is this loop actually needed?
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*/
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entry_id = ACL_FIRST_ENTRY;
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i = 0;
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while (acl_get_entry(acl_new, entry_id, &entry) == 1) {
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entry_id = ACL_NEXT_ENTRY;
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if (i != entry_number)
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continue;
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if (acl_get_tag_type(entry, &tag) == -1)
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err(1, "%s: acl_get_tag_type() failed", filename);
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if (tag == ACL_MASK)
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have_mask++;
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}
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if (acl_delete_entry_np(acl_new, entry_number) == -1) {
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carried_error++;
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warn("%s: acl_delete_entry_np() failed", filename);
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}
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acl_free(*prev_acl);
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*prev_acl = acl_new;
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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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/*
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* remove default entries
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*/
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int
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remove_default(acl_t *prev_acl, const char *filename)
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{
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acl_free(*prev_acl);
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*prev_acl = acl_init(ACL_MAX_ENTRIES);
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if (*prev_acl == NULL)
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err(1, "%s: acl_init() failed", filename);
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return (0);
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}
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/*
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* remove extended entries
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*/
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void
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remove_ext(acl_t *prev_acl, const char *filename)
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{
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acl_t acl_new;
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acl_new = acl_strip_np(*prev_acl, !n_flag);
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if (acl_new == NULL)
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err(1, "%s: acl_strip_np() failed", filename);
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acl_free(*prev_acl);
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*prev_acl = acl_new;
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}
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