Re: strncpy() and NULL termination

> >(strncpy(3) only returns NULL or a valid pointer, but there is

Okay, just to set the record straight; strncpy(3) does nul padding from i to len - 1 where i is the current position in the dst array in the event that len < strlen(src), so checking to see if dst[len - 1] == '\0' is absolutely fine, without pre-initialization. This is in the man page, and can easily be verfied by looking at the source:

char *
strncpy(dst, src, n)

        char *dst;
        const char *src;
        register size_t n;
{
        if (n != 0) {
                register char *d = dst;
                register const char *s = src;
 
                do {
                        if ((*d++ = *s++) == 0) {
                                /* NUL pad the remaining n-1 bytes */
                                while (--n != 0)
                                        *d++ = 0;
                                break;
                        }
                } while (--n != 0);
        }
        return (dst);

Note the while loop inside the do {} while(). Thanks for being on your toes, though. :-) That's what this is all about, right?

• Dan C.