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/*-
* Copyright (c) 1999-2001 Robert N. M. Watson
* All rights reserved.
*
* This software was developed by Robert Watson for the TrustedBSD Project.
*
* 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.
*
* $FreeBSD$
*/
/*
* Developed by the TrustedBSD Project.
* Support for POSIX.1e access control lists.
*/
#ifndef _SYS_ACL_H_
#define _SYS_ACL_H_
/*
* POSIX.1e ACL types and related constants.
*/
#define POSIX1E_ACL_ACCESS_EXTATTR_NAMESPACE EXTATTR_NAMESPACE_SYSTEM
#define POSIX1E_ACL_ACCESS_EXTATTR_NAME "posix1e.acl_access"
#define POSIX1E_ACL_DEFAULT_EXTATTR_NAMESPACE EXTATTR_NAMESPACE_SYSTEM
#define POSIX1E_ACL_DEFAULT_EXTATTR_NAME "posix1e.acl_default"
#define ACL_MAX_ENTRIES 32 /* maximum entries in an ACL */
typedef int acl_type_t;
typedef int acl_tag_t;
typedef mode_t acl_perm_t;
typedef mode_t *acl_permset_t;
struct acl_entry {
acl_tag_t ae_tag;
uid_t ae_id;
acl_perm_t ae_perm;
};
typedef struct acl_entry *acl_entry_t;
/* internal ACL structure */
struct acl {
int acl_cnt;
struct acl_entry acl_entry[ACL_MAX_ENTRIES];
};
/* external ACL structure */
struct acl_t_struct {
struct acl ats_acl;
int ats_cur_entry;
};
typedef struct acl_t_struct *acl_t;
/*
* Possible valid values for ae_tag field.
*/
#define ACL_UNDEFINED_TAG 0x00000000
#define ACL_USER_OBJ 0x00000001
#define ACL_USER 0x00000002
#define ACL_GROUP_OBJ 0x00000004
#define ACL_GROUP 0x00000008
#define ACL_MASK 0x00000010
#define ACL_OTHER 0x00000020
#define ACL_OTHER_OBJ ACL_OTHER
/*
* Possible valid values for acl_type_t arguments.
*/
#define ACL_TYPE_ACCESS 0x00000000
#define ACL_TYPE_DEFAULT 0x00000001
#define ACL_TYPE_AFS 0x00000002
#define ACL_TYPE_CODA 0x00000003
#define ACL_TYPE_NTFS 0x00000004
#define ACL_TYPE_NWFS 0x00000005
/*
* Possible flags in ae_perm field.
*/
#define ACL_EXECUTE 0x0001
#define ACL_WRITE 0x0002
#define ACL_READ 0x0004
#define ACL_PERM_NONE 0x0000
#define ACL_PERM_BITS (ACL_EXECUTE | ACL_WRITE | ACL_READ)
#define ACL_POSIX1E_BITS (ACL_EXECUTE | ACL_WRITE | ACL_READ)
/*
* Possible entry_id values for acl_get_entry()
*/
#define ACL_FIRST_ENTRY 0
#define ACL_NEXT_ENTRY 1
/*
* Undefined value in ae_id field
*/
#define ACL_UNDEFINED_ID ((uid_t)-1)
#ifdef _KERNEL
/*
* POSIX.1e ACLs are capable of expressing the read, write, and execute
* bits of the POSIX mode field. We provide two masks: one that defines
* the bits the ACL will replace in the mode, and the other that defines
* the bits that must be preseved when an ACL is updating a mode.
*/
#define ACL_OVERRIDE_MASK (S_IRWXU | S_IRWXG | S_IRWXO)
#define ACL_PRESERVE_MASK (~ACL_OVERRIDE_MASK)
/*
* Storage for ACLs and support structures.
*/
#ifdef MALLOC_DECLARE
MALLOC_DECLARE(M_ACL);
#endif
/*
* File system independent code to move back and forth between POSIX mode
* and POSIX.1e ACL representations.
*/
acl_perm_t acl_posix1e_mode_to_perm(acl_tag_t tag, mode_t mode);
struct acl_entry acl_posix1e_mode_to_entry(acl_tag_t tag, uid_t uid,
gid_t gid, mode_t mode);
mode_t acl_posix1e_perms_to_mode(
struct acl_entry *acl_user_obj_entry,
struct acl_entry *acl_group_obj_entry,
struct acl_entry *acl_other_entry);
mode_t acl_posix1e_acl_to_mode(struct acl *acl);
mode_t acl_posix1e_newfilemode(mode_t cmode,
struct acl *dacl);
/*
* File system independent syntax check for a POSIX.1e ACL.
*/
int acl_posix1e_check(struct acl *acl);
#else /* !_KERNEL */
/*
* Syscall interface -- use the library calls instead as the syscalls
* have strict acl entry ordering requirements.
*/
__BEGIN_DECLS
int __acl_aclcheck_fd(int _filedes, acl_type_t _type, struct acl *_aclp);
int __acl_aclcheck_file(const char *_path, acl_type_t _type,
struct acl *_aclp);
int __acl_aclcheck_link(const char *_path, acl_type_t _type,
struct acl *_aclp);
int __acl_delete_fd(int _filedes, acl_type_t _type);
int __acl_delete_file(const char *_path_p, acl_type_t _type);
int __acl_delete_link(const char *_path_p, acl_type_t _type);
int __acl_get_fd(int _filedes, acl_type_t _type, struct acl *_aclp);
int __acl_get_file(const char *_path, acl_type_t _type, struct acl *_aclp);
int __acl_get_link(const char *_path, acl_type_t _type, struct acl *_aclp);
int __acl_set_fd(int _filedes, acl_type_t _type, struct acl *_aclp);
int __acl_set_file(const char *_path, acl_type_t _type, struct acl *_aclp);
int __acl_set_link(const char *_path, acl_type_t _type, struct acl *_aclp);
__END_DECLS
/*
* Supported POSIX.1e ACL manipulation and assignment/retrieval API
* _np calls are local extensions that reflect an environment capable of
* opening file descriptors of directories, and allowing additional
* ACL type for different filesystems (i.e., AFS).
*/
__BEGIN_DECLS
int acl_add_perm(acl_permset_t _permset_d, acl_perm_t _perm);
int acl_calc_mask(acl_t *_acl_p);
int acl_clear_perms(acl_permset_t _permset_d);
int acl_copy_entry(acl_entry_t _dest_d, acl_entry_t _src_d);
ssize_t acl_copy_ext(void *_buf_p, acl_t _acl, ssize_t _size);
acl_t acl_copy_int(const void *_buf_p);
int acl_create_entry(acl_t *_acl_p, acl_entry_t *_entry_p);
int acl_delete_entry(acl_t _acl, acl_entry_t _entry_d);
int acl_delete_fd_np(int _filedes, acl_type_t _type);
int acl_delete_file_np(const char *_path_p, acl_type_t _type);
int acl_delete_link_np(const char *_path_p, acl_type_t _type);
int acl_delete_def_file(const char *_path_p);
int acl_delete_def_link_np(const char *_path_p);
int acl_delete_perm(acl_permset_t _permset_d, acl_perm_t _perm);
acl_t acl_dup(acl_t _acl);
int acl_free(void *_obj_p);
acl_t acl_from_text(const char *_buf_p);
int acl_get_entry(acl_t _acl, int _entry_id, acl_entry_t *_entry_p);
acl_t acl_get_fd(int _fd);
acl_t acl_get_fd_np(int fd, acl_type_t _type);
acl_t acl_get_file(const char *_path_p, acl_type_t _type);
acl_t acl_get_link_np(const char *_path_p, acl_type_t _type);
void *acl_get_qualifier(acl_entry_t _entry_d);
int acl_get_perm_np(acl_permset_t _permset_d, acl_perm_t _perm);
int acl_get_permset(acl_entry_t _entry_d, acl_permset_t *_permset_p);
int acl_get_tag_type(acl_entry_t _entry_d, acl_tag_t *_tag_type_p);
acl_t acl_init(int _count);
int acl_set_fd(int _fd, acl_t _acl);
int acl_set_fd_np(int _fd, acl_t _acl, acl_type_t _type);
int acl_set_file(const char *_path_p, acl_type_t _type, acl_t _acl);
int acl_set_link_np(const char *_path_p, acl_type_t _type, acl_t _acl);
int acl_set_permset(acl_entry_t _entry_d, acl_permset_t _permset_d);
int acl_set_qualifier(acl_entry_t _entry_d, const void *_tag_qualifier_p);
int acl_set_tag_type(acl_entry_t _entry_d, acl_tag_t _tag_type);
ssize_t acl_size(acl_t _acl);
char *acl_to_text(acl_t _acl, ssize_t *_len_p);
int acl_valid(acl_t _acl);
int acl_valid_fd_np(int _fd, acl_type_t _type, acl_t _acl);
int acl_valid_file_np(const char *_path_p, acl_type_t _type, acl_t _acl);
int acl_valid_link_np(const char *_path_p, acl_type_t _type, acl_t _acl);
__END_DECLS
#endif /* !_KERNEL */
#endif /* !_SYS_ACL_H_ */
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