BCOPY(3)               FreeBSD Library Functions Manual               BCOPY(3)

NAME
     bcopy - copy byte string

LIBRARY
     Standard C Library (libc, -lc)

SYNOPSIS
     #include <strings.h>

     void
     bcopy(const void *src, void *dst, size_t len);

DESCRIPTION
     The bcopy() function copies len bytes from string src to string dst.  The
     two strings may overlap.  If len is zero, no bytes are copied.

SEE ALSO
     memccpy(3), memcpy(3), memmove(3), strcpy(3), strncpy(3)

HISTORY
     A bcopy() function appeared in 4.2BSD.  Its prototype existed previously
     in <string.h> before it was moved to <strings.h> for IEEE Std 1003.1-2001
     ("POSIX.1") compliance.

     IEEE Std 1003.1-2008 ("POSIX.1") removes the specification of bcopy() and
     it is marked as LEGACY in IEEE Std 1003.1-2004 ("POSIX.1").  New programs
     should use memmove(3).  If the input and output buffer do not overlap,
     then memcpy(3) is more efficient.  Note that bcopy() takes src and dst in
     the opposite order from memmove() and memcpy().

FreeBSD 13.1-RELEASE-p6         August 24, 2015        FreeBSD 13.1-RELEASE-p6