1BCOPY(3P)                  POSIX Programmer's Manual                 BCOPY(3P)
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PROLOG

6       This  manual  page is part of the POSIX Programmer's Manual.  The Linux
7       implementation of this interface may differ (consult the  corresponding
8       Linux  manual page for details of Linux behavior), or the interface may
9       not be implemented on Linux.
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NAME

12       bcopy - memory operations (LEGACY)
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SYNOPSIS

15       #include <strings.h>
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17       void bcopy(const void *s1, void *s2, size_t n);
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DESCRIPTION

21       The bcopy() function shall copy n bytes from the area pointed to by  s1
22       to the area pointed to by s2.
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24       The  bytes are copied correctly even if the area pointed to by s1 over‐
25       laps the area pointed to by s2.
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RETURN VALUE

28       The bcopy() function shall not return a value.
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ERRORS

31       No errors are defined.
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33       The following sections are informative.
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EXAMPLES

36       None.
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APPLICATION USAGE

39       The memmove() function is preferred over this function.
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41       The following are approximately equivalent (note the order of the argu‐
42       ments):
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45              bcopy(s1,s2,n) ~= memmove(s2,s1,n)
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47       For maximum portability, it is recommended to replace the function call
48       to bcopy() as follows:
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51              #define bcopy(b1,b2,len) (memmove((b2), (b1), (len)), (void) 0)
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RATIONALE

54       None.
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FUTURE DIRECTIONS

57       This function may be withdrawn in a future version.
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SEE ALSO

60       memmove(),  the  Base  Definitions  volume   of   IEEE Std 1003.1-2001,
61       <strings.h>
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64       Portions  of  this text are reprinted and reproduced in electronic form
65       from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
66       --  Portable  Operating  System  Interface (POSIX), The Open Group Base
67       Specifications Issue 6, Copyright (C) 2001-2003  by  the  Institute  of
68       Electrical  and  Electronics  Engineers, Inc and The Open Group. In the
69       event of any discrepancy between this version and the original IEEE and
70       The  Open Group Standard, the original IEEE and The Open Group Standard
71       is the referee document. The original Standard can be  obtained  online
72       at http://www.opengroup.org/unix/online.html .
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76IEEE/The Open Group                  2003                            BCOPY(3P)
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