Re: Using the return value of strlcpy() and strlcat() - Mailing list pgsql-hackers

ilmari@ilmari.org (Dagfinn Ilmari =?utf-8?Q?Manns=C3=A5ker?=) writes:
> [ let's convert
> +        strlcpy(buf + buflen, name, NAMEDATALEN);
> +        buflen += strlen(buf + buflen);
> to
> +        buflen += strlcpy(buf + buflen, name, NAMEDATALEN);
> ]

I don't think that's a safe transformation: what strlcpy returns is
strlen(src), which might be different from what it was actually
able to fit into the destination.

Sure, they're equivalent if no truncation occurred; but if we were
100.00% sure of no truncation, we'd likely not bother with strlcpy.

            regards, tom lane