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'\" t
.\" Copyright 1993 David Metcalfe (david@prism.demon.co.uk)
.\"
.\" SPDX-License-Identifier: Linux-man-pages-copyleft
.\"
.\" References consulted:
.\" Linux libc source code
.\" Lewine's _POSIX Programmer's Guide_ (O'Reilly & Associates, 1991)
.\" 386BSD man pages
.\"
.\" Modified Sun Feb 26 14:52:00 1995 by Rik Faith <faith@cs.unc.edu>
.\" Modified Tue Oct 22 23:48:10 1996 by Eric S. Raymond <esr@thyrsus.com>
.\" "
.TH bcopy 3 2023-03-30 "Linux man-pages 6.04"
.SH NAME
bcopy \- copy byte sequence
.SH LIBRARY
Standard C library
.RI ( libc ", " \-lc )
.SH SYNOPSIS
.nf
.B #include <strings.h>
.PP
.BI "[[deprecated]] void bcopy(const void " src [. n "], void " dest [. n "], \
size_t " n );
.fi
.SH DESCRIPTION
The
.BR bcopy ()
function copies
.I n
bytes from
.I src
to
.IR dest .
The result is correct, even when both areas overlap.
.SH RETURN VALUE
None.
.SH ATTRIBUTES
For an explanation of the terms used in this section, see
.BR attributes (7).
.ad l
.nh
.TS
allbox;
lbx lb lb
l l l.
Interface Attribute Value
T{
.BR bcopy ()
T} Thread safety MT-Safe
.TE
.hy
.ad
.sp 1
.SH STANDARDS
None.
.SH HISTORY
4.3BSD.
.PP
Marked as LEGACY in POSIX.1-2001: use
.BR memcpy (3)
or
.BR memmove (3)
in new programs.
Note that the first two arguments
are interchanged for
.BR memcpy (3)
and
.BR memmove (3).
POSIX.1-2008 removes the specification of
.BR bcopy ().
.SH SEE ALSO
.BR bstring (3),
.BR memccpy (3),
.BR memcpy (3),
.BR memmove (3),
.BR strcpy (3),
.BR strncpy (3)
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