ref: 3cc8de7beda4e1a99a33728014953fc1158a336a
dir: /src/libc/string/strncpy.c/
#include <string.h>
#undef strncpy
char *
strncpy(char *restrict s1, const char *restrict s2, size_t n)
{
char *ret = s1;
for (; n > 0 && *s2; --n)
*s1++ = *s2++;
while (n-- > 0)
*s1++ = '\0';
return ret;
}