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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 (consult 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 over‐
       laps 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 argu‐
       ments):

	      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       This function may be withdrawn in a future version.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, Copyright (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.opengroup.org/unix/online.html .

IEEE/The Open Group		     2003			     BCOPY(3P)
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