The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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

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    1 /*-
    2  * Copyright (c) 1999, 2000 Robert N. M. Watson
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  *
   14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   24  * SUCH DAMAGE.
   25  *
   26  * $FreeBSD: src/sys/sys/acl.h,v 1.8 2000/01/28 15:22:51 rwatson Exp $
   27  * $DragonFly: src/sys/sys/acl.h,v 1.5 2007/02/19 00:51:54 swildner Exp $
   28  */
   29 
   30 /* 
   31  * Userland/kernel interface for Access Control Lists.
   32  *
   33  * The POSIX.1e implementation page may be reached at:
   34  * http://www.watson.org/fbsd-hardening/posix1e/
   35  */
   36 
   37 #ifndef _SYS_ACL_H_
   38 #define _SYS_ACL_H_
   39 
   40 #ifndef _SYS_TYPES_H_ 
   41 #include <sys/types.h>
   42 #endif
   43 
   44 /*
   45  * POSIX.1e ACL types and related constants
   46  */
   47 
   48 #define ACL_MAX_ENTRIES         32 /* maximum entries in an ACL */
   49 #define _POSIX_ACL_PATH_MAX     ACL_MAX_ENTRIES
   50 
   51 typedef int     acl_type_t;
   52 typedef int     acl_tag_t;
   53 typedef mode_t  acl_perm_t;
   54 
   55 struct acl_entry {
   56         acl_tag_t       ae_tag;
   57         uid_t           ae_id;
   58         acl_perm_t      ae_perm;
   59 };
   60 typedef struct acl_entry        *acl_entry_t;
   61 
   62 struct acl {
   63         int                     acl_cnt;
   64         struct acl_entry        acl_entry[ACL_MAX_ENTRIES];
   65 };
   66 typedef struct acl      *acl_t;
   67 
   68 /*
   69  * Possible valid values for a_tag of acl_entry_t
   70  */
   71 #define ACL_USER_OBJ    0x00000001
   72 #define ACL_USER        0x00000002
   73 #define ACL_GROUP_OBJ   0x00000004
   74 #define ACL_GROUP       0x00000008
   75 #define ACL_MASK        0x00000010
   76 #define ACL_OTHER       0x00000020
   77 #define ACL_OTHER_OBJ   ACL_OTHER
   78 
   79 /*
   80  * Possible valid values a_type_t arguments
   81  */
   82 #define ACL_TYPE_ACCESS         0x00000000
   83 #define ACL_TYPE_DEFAULT        0x00000001
   84 #define ACL_TYPE_AFS            0x00000002
   85 #define ACL_TYPE_CODA           0x00000003
   86 #define ACL_TYPE_NTFS           0x00000004
   87 #define ACL_TYPE_NWFS           0x00000005
   88 
   89 /*
   90  * Possible flags in a_perm field
   91  */
   92 #define ACL_PERM_EXEC   0x0001
   93 #define ACL_PERM_WRITE  0x0002
   94 #define ACL_PERM_READ   0x0004
   95 #define ACL_PERM_NONE   0x0000
   96 #define ACL_PERM_BITS   (ACL_PERM_EXEC | ACL_PERM_WRITE | ACL_PERM_READ)
   97 #define ACL_POSIX1E_BITS        (ACL_PERM_EXEC | ACL_PERM_WRITE | ACL_PERM_READ)
   98 
   99 #ifndef _KERNEL
  100 
  101 /*
  102  * Syscall interface -- use the library calls instead as the syscalls
  103  * have strict acl entry ordering requirements
  104  */
  105 __BEGIN_DECLS
  106 int     __acl_aclcheck_fd(int, acl_type_t, struct acl *);
  107 int     __acl_aclcheck_file(const char *, acl_type_t, struct acl *);
  108 int     __acl_delete_fd(int, acl_type_t);
  109 int     __acl_delete_file(const char *, acl_type_t);
  110 int     __acl_get_fd(int, acl_type_t, struct acl *);
  111 int     __acl_get_file(const char *, acl_type_t, struct acl *);
  112 int     __acl_set_fd(int, acl_type_t, struct acl *);
  113 int     __acl_set_file(const char *, acl_type_t, struct acl *);
  114 __END_DECLS
  115 
  116 /*
  117  * Supported POSIX.1e ACL manipulation and assignment/retrieval API
  118  * _np calls are local extensions that reflect an environment capable of
  119  * opening file descriptors of directories, and allowing additional
  120  * ACL type for different file systems (i.e., AFS)
  121  */
  122 __BEGIN_DECLS
  123 int     acl_delete_fd_np(int, acl_type_t);
  124 int     acl_delete_file_np(const char *, acl_type_t);
  125 int     acl_delete_def_file(const char *);
  126 acl_t   acl_dup(acl_t);
  127 int     acl_free(void *);
  128 acl_t   acl_from_text(const char *);
  129 acl_t   acl_get_fd(int);
  130 acl_t   acl_get_fd_np(int, acl_type_t);
  131 acl_t   acl_get_file(const char *, acl_type_t);
  132 acl_t   acl_init(int);
  133 int     acl_set_fd(int, acl_t);
  134 int     acl_set_fd_np(int, acl_t, acl_type_t);
  135 int     acl_set_file(const char *, acl_type_t, acl_t);
  136 char    *acl_to_text(acl_t, ssize_t *);
  137 int     acl_valid(acl_t);
  138 int     acl_valid_fd_np(int, acl_type_t, acl_t);
  139 int     acl_valid_file_np(const char *, acl_type_t, acl_t);
  140 __END_DECLS
  141 
  142 #endif /* !_KERNEL */
  143 
  144 #endif /* !_SYS_ACL_H_ */

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