strlcpy

#include <sys/types.h>

size_t strlcpy(char * __restrict dst, const char * __restrict src, size_t siz)
{
    char *d = dst;
    const char *s = src;
    size_t n = siz;

    if (n != 0)
    {
        while (--n != 0)
        {
            if ((*d++ = *s++) == '\0')
                break;
        }
    }

    if (n == 0)
    {
        if (siz != 0)
            *d = '\0';
        while (*s++)
            ;
    }

    return (s - src - 1);
}