1MEMMOVE(3P)                POSIX Programmer's Manual               MEMMOVE(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       memmove — copy bytes in memory with overlapping areas
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SYNOPSIS

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

20       The functionality described on this reference page is aligned with  the
21       ISO C  standard.  Any  conflict between the requirements described here
22       and the ISO C standard is unintentional. This  volume  of  POSIX.1‐2017
23       defers to the ISO C standard.
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25       The memmove() function shall copy n bytes from the object pointed to by
26       s2 into the object pointed to by s1.  Copying takes place as if  the  n
27       bytes  from  the object pointed to by s2 are first copied into a tempo‐
28       rary array of n bytes that does not overlap the objects pointed  to  by
29       s1  and  s2,  and  then the n bytes from the temporary array are copied
30       into the object pointed to by s1.
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RETURN VALUE

33       The memmove() function shall return s1; no return value is reserved  to
34       indicate an error.
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ERRORS

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

42       None.
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APPLICATION USAGE

45       None.
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RATIONALE

48       None.
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FUTURE DIRECTIONS

51       None.
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SEE ALSO

54       The Base Definitions volume of POSIX.1‐2017, <string.h>
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57       Portions  of  this text are reprinted and reproduced in electronic form
58       from IEEE Std 1003.1-2017, Standard for Information Technology --  Por‐
59       table  Operating System Interface (POSIX), The Open Group Base Specifi‐
60       cations Issue 7, 2018 Edition, Copyright (C) 2018 by the  Institute  of
61       Electrical  and  Electronics Engineers, Inc and The Open Group.  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.opengroup.org/unix/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                  2017                          MEMMOVE(3P)
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