freebsd-dev/bin/setfacl/remove.c
Joel Dahl a303eae7c8 Switch to our preferred license text.
Approved by:	jedgar
2010-03-07 07:59:05 +00:00

174 lines
4.2 KiB
C

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