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FreeBSD 11.0 - man page for memmove (freebsd section 3)

MEMMOVE(3)						   BSD Library Functions Manual 						MEMMOVE(3)

NAME
memmove -- copy byte string
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <string.h> void * memmove(void *dst, const void *src, size_t len);
DESCRIPTION
The memmove() function copies len bytes from string src to string dst. The two strings may overlap; the copy is always done in a non- destructive manner.
RETURN VALUES
The memmove() function returns the original value of dst.
SEE ALSO
bcopy(3), memccpy(3), memcpy(3), strcpy(3), wmemmove(3)
STANDARDS
The memmove() function conforms to ISO/IEC 9899:1990 (``ISO C90'').
BSD
June 4, 1993 BSD