Copyright (c) 2001 Dima Dorfman <dd@FreeBSD.org>
Copyright (c) 2011 Emmanuel Dreyfus <manu@NetBSD.org>
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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 n 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.
p .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 skiping unaccessible namespaces.
p 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.