1MEMCPY(3P)                 POSIX Programmer's Manual                MEMCPY(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

13       memcpy — copy bytes in memory
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SYNOPSIS

16       #include <string.h>
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18       void *memcpy(void *restrict s1, const void *restrict s2, size_t n);
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DESCRIPTION

21       The functionality described on this reference page is aligned with  the
22       ISO C  standard.  Any  conflict between the requirements described here
23       and the ISO C standard is unintentional. This  volume  of  POSIX.1‐2008
24       defers to the ISO C standard.
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26       The  memcpy() function shall copy n bytes from the object pointed to by
27       s2 into the object pointed to by s1.  If copying  takes  place  between
28       objects that overlap, the behavior is undefined.
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RETURN VALUE

31       The  memcpy()  function shall return s1; no return value is reserved to
32       indicate an error.
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ERRORS

35       No errors are defined.
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37       The following sections are informative.
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EXAMPLES

40       None.
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APPLICATION USAGE

43       The memcpy() function does not check for the overflow of the  receiving
44       memory area.
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RATIONALE

47       None.
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FUTURE DIRECTIONS

50       None.
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SEE ALSO

53       The Base Definitions volume of POSIX.1‐2008, <string.h>
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56       Portions  of  this text are reprinted and reproduced in electronic form
57       from IEEE Std 1003.1, 2013 Edition, Standard for Information Technology
58       --  Portable  Operating  System  Interface (POSIX), The Open Group Base
59       Specifications Issue 7, Copyright (C) 2013 by the Institute of Electri‐
60       cal  and  Electronics  Engineers,  Inc  and  The  Open Group.  (This is
61       POSIX.1-2008 with the 2013 Technical Corrigendum  1  applied.)  In  the
62       event of any discrepancy between this version and the original IEEE and
63       The Open Group Standard, the original IEEE and The Open Group  Standard
64       is  the  referee document. The original Standard can be obtained online
65       at http://www.unix.org/online.html .
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67       Any typographical or formatting errors that appear  in  this  page  are
68       most likely to have been introduced during the conversion of the source
69       files to man page format. To report such errors,  see  https://www.ker‐
70       nel.org/doc/man-pages/reporting_bugs.html .
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74IEEE/The Open Group                  2013                           MEMCPY(3P)
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