NAME

memcpy — copy byte string

LIBRARY

Standard C Library (libc, -lc)

SYNOPSIS

#include <string.h>

void *
memcpy(void *dst, const void *src, size_t len);

DESCRIPTION

The memcpy() function copies len bytes from string src to string dst. If src and dst overlap, the results are not defined.

RETURN VALUES

The memcpy() function returns the original value of dst.

SEE ALSO

bcopy(3), memccpy(3), memmove(3), strcpy(3), wmemcpy(3)

STANDARDS

The memcpy() function conforms to ISO/IEC 9899:1990 (“ISO C90”).

BUGS

In this implementation memcpy() is implemented using bcopy(3), and therefore the strings may overlap. On other systems, copying overlapping strings may produce surprises. Programs intended to be portable should use memmove(3) when src and dst may overlap.