Manual Pages  — MEMCPY

memcpy – copy byte string

LIBRARY SYNOPSIS DESCRIPTION RETURN VALUES SEE ALSO STANDARDS HISTORY

Standard C Library (libc, -lc)

#include <string.h>

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

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

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

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

The mempcpy() function returns a pointer to the byte after the last written byte.

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

The memcpy() function first appeared in AT&T V and was reimplemented for BSD 4.3 Tahoe . The mempcpy() function first appeared in FreeBSD 13.1 .