.\" $NetBSD: extattr_copy_file.3,v 1.4 2021/12/10 19:30:05 andvar Exp $ .\" .\" Copyright (c) 2001 Dima Dorfman .\" Copyright (c) 2011 Emmanuel Dreyfus .\" 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: src/lib/libc/posix1e/extattr.3,v 1.5 2002/12/12 17:25:53 ru Exp .\" .Dd December 16, 2011 .Dt EXTATTR_COPY_FILE 3 .Os .Sh NAME .Nm extattr_copy_file , .Nm extattr_copy_fd , .Nm extattr_copy_link , .Nm cpxattr , .Nm fcpxattr , .Nm lcpxattr .Nd copy extended attributes from a file to another one .Sh LIBRARY .Lb libc .Sh SYNOPSIS .In sys/extattr.h .Ft int .Fn extattr_copy_file "const char *from" "const char *to" "int namespace" .Ft int .Fn extattr_copy_fd "int from_fd" "int to_fd" "int namespace" .Ft int .Fn extattr_copy_link "const char *from" "const char *to" "int namespace" .Ft int .Fn cpxattr "const char *from" "const char *to" .Ft int .Fn fcpxattr "int from_fd" "int to_fd" .Ft int .Fn lcpxattr "const char *from" "const char *to" .Sh DESCRIPTION .Fn extattr_copy_file copies extended attributes of namespace .Ar namespace from a file to another one. .Fn extattr_copy_fd does the same using open file descriptors, and .Fn extattr_copy_link does the same as .Fn extattr_copy_file but operates on symbolic links themselves instead of their targets. .Pp .Fn cpxattr , .Fn fcpxattr , and .Fn lcpxattr respectively work the same was as .Fn extattr_copy_file , .Fn extattr_copy_fd , and .Fn extattr_copy_link , but will copy extended attributes from all namespaces accessible to the user, silently skipping inaccessible namespaces. .Pp Please note that none of the extended attribute copying functions are atomic. .Sh RETURN VALUES If any of the calls are unsuccessful, the value \-1 is returned and the global variable .Va errno is set to indicate the error. .Sh ERRORS Extended attribute copying functions may raise errors produced by .Xr extattr_list_file 2 and .Xr extattr_get_file 2 . .Sh SEE ALSO .Xr getextattr 1 , .Xr extattr_get_file 2 , .Xr extattr_namespace_to_string 3 , .Xr extattr 9 .Sh HISTORY Extended attribute support was developed as part of the .Tn TrustedBSD Project, and introduced in .Fx 5.0 and .Nx 3.0 . It was developed to support security extensions requiring additional labels to be associated with each file or directory.