293 lines
8.2 KiB
C
293 lines
8.2 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 CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* 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 "setfacl.h"
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static int merge_user_group(acl_entry_t *entry, acl_entry_t *entry_new,
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int acl_brand);
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static int
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merge_user_group(acl_entry_t *entry, acl_entry_t *entry_new, int acl_brand)
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{
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acl_permset_t permset;
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acl_entry_type_t entry_type;
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acl_flagset_t flagset;
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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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if (acl_brand == ACL_BRAND_NFS4) {
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if (acl_get_entry_type_np(*entry, &entry_type))
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err(1, "acl_get_entry_type_np() failed");
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if (acl_set_entry_type_np(*entry_new, entry_type))
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err(1, "acl_set_entry_type_np() failed");
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if (acl_get_flagset_np(*entry, &flagset))
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err(1, "acl_get_flagset_np() failed");
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if (acl_set_flagset_np(*entry_new, flagset))
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err(1, "acl_set_flagset_np() failed");
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}
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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, const char *filename)
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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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acl_entry_type_t entry_type, entry_type_new;
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acl_flagset_t flagset;
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int entry_id, entry_id_new, have_entry, had_entry, entry_number = 0;
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int acl_brand, prev_acl_brand;
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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 merged 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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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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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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had_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, "%s: acl_get_tag_type() failed - "
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"invalid ACL entry", filename);
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if (tag == ACL_MASK)
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have_mask = true;
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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 (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, "%s: acl_get_tag_type() failed",
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filename);
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if (acl_get_tag_type(entry_new, &tag_new) == -1)
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err(1, "%s: acl_get_tag_type() failed",
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filename);
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if (tag != tag_new)
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continue;
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/*
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* For NFSv4, in addition to "tag" and "id" we also
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* compare "entry_type".
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*/
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if (acl_brand == ACL_BRAND_NFS4) {
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if (acl_get_entry_type_np(entry, &entry_type))
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err(1, "%s: acl_get_entry_type_np() "
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"failed", filename);
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if (acl_get_entry_type_np(entry_new, &entry_type_new))
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err(1, "%s: acl_get_entry_type_np() "
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"failed", filename);
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if (entry_type != entry_type_new)
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continue;
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}
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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, acl_brand);
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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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case ACL_EVERYONE:
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if (acl_get_permset(entry, &permset) == -1)
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err(1, "%s: acl_get_permset() failed",
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filename);
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if (acl_set_permset(entry_new, permset) == -1)
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err(1, "%s: acl_set_permset() failed",
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filename);
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if (acl_brand == ACL_BRAND_NFS4) {
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if (acl_get_entry_type_np(entry, &entry_type))
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err(1, "%s: acl_get_entry_type_np() failed",
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filename);
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if (acl_set_entry_type_np(entry_new, entry_type))
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err(1, "%s: acl_set_entry_type_np() failed",
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filename);
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if (acl_get_flagset_np(entry, &flagset))
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err(1, "%s: acl_get_flagset_np() failed",
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filename);
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if (acl_set_flagset_np(entry_new, flagset))
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err(1, "%s: acl_set_flagset_np() failed",
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filename);
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}
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had_entry = 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, "%s: invalid tag type: %i", filename, 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 (had_entry == 0) {
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/*
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* NFSv4 ACL entries must be prepended to the ACL.
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* Appending them at the end makes no sense, since
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* in most cases they wouldn't even get evaluated.
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*/
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if (acl_brand == ACL_BRAND_NFS4) {
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if (acl_create_entry_np(&acl_new, &entry_new, entry_number) == -1) {
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warn("%s: acl_create_entry_np() failed", filename);
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acl_free(acl_new);
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return (-1);
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}
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/*
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* Without this increment, adding several
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* entries at once, for example
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* "setfacl -m user:1:r:allow,user:2:r:allow",
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* would make them appear in reverse order.
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*/
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entry_number++;
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} else {
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if (acl_create_entry(&acl_new, &entry_new) == -1) {
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warn("%s: acl_create_entry() failed", filename);
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acl_free(acl_new);
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return (-1);
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}
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}
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if (acl_copy_entry(entry_new, entry) == -1)
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err(1, "%s: acl_copy_entry() failed", 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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return (0);
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}
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int
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add_acl(acl_t acl, uint entry_number, acl_t *prev_acl, const char *filename)
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{
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acl_entry_t entry, entry_new;
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acl_t acl_new;
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int entry_id, acl_brand, prev_acl_brand;
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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 (prev_acl_brand != ACL_BRAND_NFS4) {
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warnx("%s: the '-a' option is only applicable to NFSv4 ACLs",
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filename);
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return (-1);
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}
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if (branding_mismatch(acl_brand, ACL_BRAND_NFS4)) {
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warnx("%s: branding mismatch; existing ACL is NFSv4, "
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"entry to be added is %s", filename,
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brand_name(acl_brand));
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return (-1);
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}
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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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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_create_entry_np(&acl_new, &entry_new, entry_number) == -1) {
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warn("%s: acl_create_entry_np() failed", filename);
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acl_free(acl_new);
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return (-1);
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}
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/*
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* Without this increment, adding several
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* entries at once, for example
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* "setfacl -m user:1:r:allow,user:2:r:allow",
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* would make them appear in reverse order.
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*/
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entry_number++;
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if (acl_copy_entry(entry_new, entry) == -1)
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err(1, "%s: acl_copy_entry() 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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return (0);
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}
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