FreeBSD/Linux Kernel Cross Reference
sys/sys/acl.h

     /*-
      * Copyright (c) 1999, 2000 Robert N. M. Watson
      * 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.
     *
     * $FreeBSD$
     */
    
    /* 
     * Userland/kernel interface for Access Control Lists.
     *
     * The POSIX.1e implementation page may be reached at:
     * http://www.watson.org/fbsd-hardening/posix1e/
     */
    
    #ifndef _SYS_ACL_H
    #define _SYS_ACL_H
    
    /*
     * POSIX.1e ACL types and related constants
     */
    
    #define ACL_MAX_ENTRIES         32 /* maximum entries in an ACL */
    #define _POSIX_ACL_PATH_MAX     ACL_MAX_ENTRIES
    
    typedef int     acl_type_t;
    typedef int     acl_tag_t;
    typedef mode_t  acl_perm_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;
    
    struct acl {
            int                     acl_cnt;
            struct acl_entry        acl_entry[ACL_MAX_ENTRIES];
    };
    typedef struct acl      *acl_t;
    
    /*
     * Possible valid values for a_tag of acl_entry_t
     */
    #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 a_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 a_perm field
     */
    #define ACL_PERM_EXEC   0x0001
    #define ACL_PERM_WRITE  0x0002
    #define ACL_PERM_READ   0x0004
    #define ACL_PERM_NONE   0x0000
    #define ACL_PERM_BITS   (ACL_PERM_EXEC | ACL_PERM_WRITE | ACL_PERM_READ)
    #define ACL_POSIX1E_BITS        (ACL_PERM_EXEC | ACL_PERM_WRITE | ACL_PERM_READ)
    
    #ifdef _KERNEL
    
    /*
     * Storage for ACLs and support structures
     */
    #ifdef MALLOC_DECLARE
   MALLOC_DECLARE(M_ACL);
   #endif
   
   #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_delete_fd(int _filedes, acl_type_t _type);
   int     __acl_delete_file(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_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);
   __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 file systems (i.e., AFS)
    */
   __BEGIN_DECLS
   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_def_file(const char *_path_p);
   acl_t   acl_dup(acl_t _acl);
   int     acl_free(void *_obj_p);
   acl_t   acl_from_text(const char *_buf_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_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);
   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);
   __END_DECLS
   
   #endif /* !_KERNEL */
   
   #endif /* !_SYS_ACL_H */

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