BCOPY(3P)                                           POSIX Programmer's Manual                                          BCOPY(3P)



PROLOG
       This  manual  page is part of the POSIX Programmer's Manual.  The Linux implementation of this interface may differ (con-
       sult the corresponding Linux manual page for details of Linux behavior), or the  interface  may  not  be  implemented  on
       Linux.

NAME
       bcopy - memory operations (LEGACY)

SYNOPSIS
       #include <strings.h>

       void bcopy(const void *s1, void *s2, size_t n);


DESCRIPTION
       The bcopy() function shall copy n bytes from the area pointed to by s1 to the area pointed to by s2.

       The bytes are copied correctly even if the area pointed to by s1 overlaps the area pointed to by s2.

RETURN VALUE
       The bcopy() function shall not return a value.

ERRORS
       No errors are defined.

       The following sections are informative.

EXAMPLES
       None.

APPLICATION USAGE
       The memmove() function is preferred over this function.

       The following are approximately equivalent (note the order of the arguments):


              bcopy(s1,s2,n) ~= memmove(s2,s1,n)

       For maximum portability, it is recommended to replace the function call to bcopy() as follows:


              #define bcopy(b1,b2,len) (memmove((b2), (b1), (len)), (void) 0)

RATIONALE
       None.

FUTURE DIRECTIONS
       This function may be withdrawn in a future version.

SEE ALSO
       memmove(), the Base Definitions volume of IEEE Std 1003.1-2001, <strings.h>

COPYRIGHT
       Portions  of  this  text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition, Standard for
       Information Technology -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6,  Copy-
       right (C) 2001-2003 by the Institute of Electrical and Electronics Engineers, Inc and The Open Group. In the event of any
       discrepancy between this version and the original IEEE and The Open Group Standard, the original IEEE and The Open  Group
       Standard   is   the   referee   document.   The   original   Standard   can   be   obtained  online  at  http://www.open-
       group.org/unix/online.html .



IEEE/The Open Group                                           2003                                                     BCOPY(3P)