f14fb60209
* Updating common/lib * Updating lib/csu * Updating lib/libc * Updating libexec/ld.elf_so * Corrected test on __minix in featuretest to actually follow the meaning of the comment. * Cleaned up _REENTRANT-related defintions. * Disabled -D_REENTRANT for libfetch * Removing some unneeded __NBSD_LIBC defines and tests Change-Id: Ic1394baef74d11b9f86b312f5ff4bbc3cbf72ce2
105 lines
3.5 KiB
Groff
105 lines
3.5 KiB
Groff
.\" $NetBSD: extattr_copy_file.3,v 1.2 2011/12/16 15:21:13 manu Exp $
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.\"
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.\" Copyright (c) 2001 Dima Dorfman <dd@FreeBSD.org>
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.\" Copyright (c) 2011 Emmanuel Dreyfus <manu@NetBSD.org>
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" FreeBSD: src/lib/libc/posix1e/extattr.3,v 1.5 2002/12/12 17:25:53 ru Exp
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.\"
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.Dd December 16, 2011
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.Dt EXTATTR_COPY_FILE 3
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.Os
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.Sh NAME
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.Nm extattr_copy_file ,
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.Nm extattr_copy_fd ,
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.Nm extattr_copy_link ,
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.Nm cpxattr ,
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.Nm fcpxattr ,
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.Nm lcpxattr
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.Nd copy extended attributes from a file to another one
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.Sh LIBRARY
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.Lb libc
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.Sh SYNOPSIS
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.In sys/extattr.h
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.Ft int
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.Fn extattr_copy_file "const char *from" "const char *to" "int namespace"
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.Ft int
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.Fn extattr_copy_fd "int from_fd" "int to_fd" "int namespace"
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.Ft int
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.Fn extattr_copy_link "const char *from" "const char *to" "int namespace"
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.Ft int
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.Fn cpxattr "const char *from" "const char *to"
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.Ft int
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.Fn fcpxattr "int from_fd" "int to_fd"
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.Ft int
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.Fn lcpxattr "const char *from" "const char *to"
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.Sh DESCRIPTION
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.Fn extattr_copy_file
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copies extended attributes of namespace
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.Ar namespace
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from a file to another one.
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.Fn extattr_copy_fd
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does the same using open file descriptors, and
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.Fn extattr_copy_link
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does the same as
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.Fn extattr_copy_file
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but operates on symbolic links themselves instead of their targets.
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.Pp
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.Fn cpxattr ,
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.Fn fcpxattr ,
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and
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.Fn lcpxattr
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respectively work the same was as
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.Fn extattr_copy_file ,
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.Fn extattr_copy_fd ,
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and
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.Fn extattr_copy_link ,
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but will copy extended attributes from all namespaces accessible to the user,
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silently skiping unaccessible namespaces.
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.Pp
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Please note that none of the extended attribute copying functions are atomic.
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.Sh RETURN VALUES
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If any of the calls are unsuccessful, the value \-1 is returned
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and the global variable
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.Va errno
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is set to indicate the error.
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.Sh ERRORS
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Extended attribute copying functions may raise errors produced by
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.Xr extattr_list_file 2
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and
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.Xr extattr_get_file 2 .
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.Sh SEE ALSO
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.Xr getextattr 1 ,
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.Xr extattr_get_file 2 ,
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.Xr extattr_namespace_to_string 3 ,
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.Xr extattr 9
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.Sh HISTORY
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Extended attribute support was developed as part of the
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.Tn TrustedBSD
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Project, and introduced in
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.Fx 5.0
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and
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.Nx 3.0 .
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It was developed to support security extensions requiring additional labels
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to be associated with each file or directory.
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