memcpy(3) Library Functions Manual memcpy(3) memcpy - C (libc, -lc) #include void *memcpy(size_t n; void dest[restrict n], const void src[restrict n], size_t n); memcpy() n src dest. . , memmove(3). memcpy() dest. attributes(7). +----------------------------+----------------------------------------------------------+--------------------------+ | | | | +----------------------------+----------------------------------------------------------+--------------------------+ |memcpy() | | MT-Safe | +----------------------------+----------------------------------------------------------+--------------------------+ C11, POSIX.1-2008. POSIX.1-2001, C89, SVr4, 4.3BSD. CAVEATS ( POSIX C , memcpy() ). , glibc 2.13 memcpy() ( x86-64) src dest. , . , , , . glibc 2.14 , (.., glibc 2.14) memcpy(), ( <<>> memcpy(), memmove(3)). bcopy(3), bstring(3), memccpy(3), memmove(3), mempcpy(3), strcpy(3), strncpy(3), wmemcpy(3) () aereiae , Alexey , Azamat Hackimov , Dmitriy S. Seregin , Dmitry Bolkhovskikh , ITriskTI , Max Is , Yuri Kozlov , ; GNU (GNU General Public License - GPL, 3 ) , - . - , , () () () . Linux man-pages 6.18 8 2026 . memcpy(3)