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/extattr.h

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    1 /*-
    2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
    3  *
    4  * Copyright (c) 1999-2001 Robert N. M. Watson
    5  * All rights reserved.
    6  *
    7  * This software was developed by Robert Watson for the TrustedBSD Project.
    8  *
    9  * Redistribution and use in source and binary forms, with or without
   10  * modification, are permitted provided that the following conditions
   11  * are met:
   12  * 1. Redistributions of source code must retain the above copyright
   13  *    notice, this list of conditions and the following disclaimer.
   14  * 2. Redistributions in binary form must reproduce the above copyright
   15  *    notice, this list of conditions and the following disclaimer in the
   16  *    documentation and/or other materials provided with the distribution.
   17  *
   18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   19  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   21  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   22  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   23  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   24  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   26  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   27  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   28  * SUCH DAMAGE.
   29  *
   30  * $FreeBSD: releng/12.0/sys/sys/extattr.h 326256 2017-11-27 15:01:59Z pfg $
   31  */
   32 /*
   33  * Developed by the TrustedBSD Project.
   34  * Support for extended filesystem attributes.
   35  */
   36 
   37 #ifndef _SYS_EXTATTR_H_
   38 #define _SYS_EXTATTR_H_
   39 
   40 /*
   41  * Defined name spaces for extended attributes.  Numeric constants are passed
   42  * via system calls, but a user-friendly string is also defined.
   43  */
   44 #define EXTATTR_NAMESPACE_EMPTY         0x00000000
   45 #define EXTATTR_NAMESPACE_EMPTY_STRING  "empty"
   46 #define EXTATTR_NAMESPACE_USER          0x00000001
   47 #define EXTATTR_NAMESPACE_USER_STRING   "user"
   48 #define EXTATTR_NAMESPACE_SYSTEM        0x00000002
   49 #define EXTATTR_NAMESPACE_SYSTEM_STRING "system"
   50 
   51 /*
   52  * The following macro is designed to initialize an array that maps
   53  * extended-attribute namespace values to their names, e.g.:
   54  *
   55  * char *extattr_namespace_names[] = EXTATTR_NAMESPACE_NAMES;
   56  */
   57 #define EXTATTR_NAMESPACE_NAMES { \
   58         EXTATTR_NAMESPACE_EMPTY_STRING, \
   59         EXTATTR_NAMESPACE_USER_STRING, \
   60         EXTATTR_NAMESPACE_SYSTEM_STRING }
   61 
   62 #define EXTATTR_MAXNAMELEN      NAME_MAX
   63 
   64 #ifdef _KERNEL
   65 #include <sys/types.h>
   66 
   67 struct thread;
   68 struct ucred;
   69 struct vnode;
   70 int     extattr_check_cred(struct vnode *vp, int attrnamespace,
   71             struct ucred *cred, struct thread *td, accmode_t accmode);
   72 
   73 #else
   74 #include <sys/cdefs.h>
   75 
   76 struct iovec;
   77 
   78 __BEGIN_DECLS
   79 int     extattrctl(const char *_path, int _cmd, const char *_filename,
   80             int _attrnamespace, const char *_attrname);
   81 int     extattr_delete_fd(int _fd, int _attrnamespace, const char *_attrname);
   82 int     extattr_delete_file(const char *_path, int _attrnamespace,
   83             const char *_attrname);
   84 int     extattr_delete_link(const char *_path, int _attrnamespace,
   85             const char *_attrname);
   86 ssize_t extattr_get_fd(int _fd, int _attrnamespace, const char *_attrname,
   87             void *_data, size_t _nbytes);
   88 ssize_t extattr_get_file(const char *_path, int _attrnamespace,
   89             const char *_attrname, void *_data, size_t _nbytes);
   90 ssize_t extattr_get_link(const char *_path, int _attrnamespace,
   91             const char *_attrname, void *_data, size_t _nbytes);
   92 ssize_t extattr_list_fd(int _fd, int _attrnamespace, void *_data,
   93             size_t _nbytes);
   94 ssize_t extattr_list_file(const char *_path, int _attrnamespace, void *_data,
   95             size_t _nbytes);
   96 ssize_t extattr_list_link(const char *_path, int _attrnamespace, void *_data,
   97             size_t _nbytes);
   98 ssize_t extattr_set_fd(int _fd, int _attrnamespace, const char *_attrname,
   99             const void *_data, size_t _nbytes);
  100 ssize_t extattr_set_file(const char *_path, int _attrnamespace,
  101             const char *_attrname, const void *_data, size_t _nbytes);
  102 ssize_t extattr_set_link(const char *_path, int _attrnamespace,
  103             const char *_attrname, const void *_data, size_t _nbytes);
  104 __END_DECLS
  105 
  106 #endif /* !_KERNEL */
  107 #endif /* !_SYS_EXTATTR_H_ */

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