ref: ebd513c2adeb9758701bf9f7a10b17ce58c2d1c8
dir: /lib/c/strncpy.c/
#include <string.h>
#undef strncpy
char *
strncpy(char * restrict dst, const char * restrict src, size_t n)
{
char *ret = dst;
for (; n > 0 && *src; --n)
*dst++ = *src++;
while (n-- > 0)
*dst++ = '\0';
return ret;
}