MEMCPY(3) | Library Functions Manual | MEMCPY(3)

# NAME

`memcpy` — copy bytes

# SYNOPSIS

`#include <string.h>`

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

# DESCRIPTION

The `memcpy`() function copies len bytes from buffer src to buffer dst. If the two buffers may overlap, memmove(3) must be used instead.

# RETURN VALUES

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

# SEE ALSO

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

# STANDARDS

The `memcpy`() function conforms to ANSI X3.159-1989 (“ANSI C89”).

# HISTORY

The `memcpy`() function first appeared in AT&T System V UNIX and was reimplemented for 4.3BSD.

December 11, 2024 | Debian