Function recv_negotiate_str

compat.c:369–407

This routine is always called with a tmpbuf of MAX_NSTR_STRLEN length, but the * buffer may be pre-populated with a "len" length string to use OR a len of -1 * to tell us to read a string from the fd. */

 * buffer may be pre-populated with a "len" length string to use OR a len of -1
 * to tell us to read a string from the fd. */
static void recv_negotiate_str(int f_in, struct name_num_obj *nno, char *tmpbuf, int len)
{
	if (len < 0)
		len = read_vstring(f_in, tmpbuf, MAX_NSTR_STRLEN);

	if (DEBUG_GTE(NSTR, am_server ? 3 : 2)) {
		if (am_server)
			rprintf(FINFO, "Client %s list (on server): %s\n", nno->type, tmpbuf);
		else
			rprintf(FINFO, "Server %s list (on client): %s\n", nno->type, tmpbuf);
	}

	if (len > 0 && parse_negotiate_str(nno, tmpbuf))
		return;

	if (!am_server || !do_negotiated_strings) {
		char *cp = tmpbuf;
		int j;
		rprintf(FERROR, "Failed to negotiate a %s choice.\n", nno->type);
		rprintf(FERROR, "%s list: %s\n", am_server ? "Client" : "Server", tmpbuf);
		/* Recreate our original list from the saw values. This can't overflow our huge
		 * buffer because we don't have enough valid entries to get anywhere close. */
		for (j = 1, *cp = '\0'; j <= nno->saw_len; j++) {
			struct name_num_item *nni;
			for (nni = nno->list; nni->name; nni++) {
				if (nno->saw[nni->num] == j) {
					*cp++ = ' ';
					cp += strlcpy(cp, nni->name, MAX_NSTR_STRLEN - (cp - tmpbuf));
					break;
				}
			}
		}
		if (!*tmpbuf)
			strlcpy(cp, " INVALID", MAX_NSTR_STRLEN);
		rprintf(FERROR, "%s list:%s\n", am_server ? "Server" : "Client", tmpbuf);
	}

	exit_cleanup(RERR_UNSUPPORTED);
}

static const char *getenv_nstr(int ntype)
{