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/*
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File: __acl_from_xattr.c
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Copyright (C) 1999, 2000
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Andreas Gruenbacher, <a.gruenbacher@bestbits.at>
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include "config.h"
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#include "libacl.h"
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#include "byteorder.h"
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#include "acl_ea.h"
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acl_t
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__acl_from_xattr(const char *ext_acl_p, size_t size)
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{
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acl_ea_header *ext_header_p = (acl_ea_header *)ext_acl_p;
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acl_ea_entry *ext_entry_p = (acl_ea_entry *)(ext_header_p+1);
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acl_ea_entry *ext_end_p;
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acl_obj *acl_obj_p;
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acl_entry_obj *entry_obj_p;
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int entries;
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if (size < sizeof(acl_ea_header)) {
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errno = EINVAL;
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return NULL;
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}
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if (ext_header_p->a_version != cpu_to_le32(ACL_EA_VERSION)) {
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errno = EINVAL;
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return NULL;
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}
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size -= sizeof(acl_ea_header);
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if (size % sizeof(acl_ea_entry)) {
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errno = EINVAL;
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return NULL;
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}
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entries = size / sizeof(acl_ea_entry);
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ext_end_p = ext_entry_p + entries;
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acl_obj_p = __acl_init_obj(entries);
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if (acl_obj_p == NULL)
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return NULL;
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while (ext_end_p != ext_entry_p) {
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entry_obj_p = __acl_create_entry_obj(acl_obj_p);
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if (!entry_obj_p)
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goto fail;
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entry_obj_p->etag = le16_to_cpu(ext_entry_p->e_tag);
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entry_obj_p->eperm.sperm = le16_to_cpu(ext_entry_p->e_perm);
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switch(entry_obj_p->etag) {
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case ACL_USER_OBJ:
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case ACL_GROUP_OBJ:
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case ACL_MASK:
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case ACL_OTHER:
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entry_obj_p->eid.qid = ACL_UNDEFINED_ID;
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break;
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case ACL_USER:
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case ACL_GROUP:
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entry_obj_p->eid.qid =
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le32_to_cpu(ext_entry_p->e_id);
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break;
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default:
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errno = EINVAL;
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goto fail;
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}
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ext_entry_p++;
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}
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if (__acl_reorder_obj_p(acl_obj_p))
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goto fail;
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return int2ext(acl_obj_p);
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fail:
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__acl_free_acl_obj(acl_obj_p);
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return NULL;
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}
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