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

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