static int attr_scan0_string(VSTREAM *fp, VSTRING *plain_buf, const char *context)
{
int ch;
if ((ch = vstring_get_null(plain_buf, fp)) == VSTREAM_EOF) {
msg_warn("%s on %s while reading %s",
vstream_ftimeout(fp) ? "timeout" : "premature end-of-input",
VSTREAM_PATH(fp), context);
return (-1);
}
if (ch != 0) {
msg_warn("unexpected end-of-input from %s while reading %s",
VSTREAM_PATH(fp), context);
return (-1);
}
if (msg_verbose)
msg_info("%s: %s", context, *STR(plain_buf) ? STR(plain_buf) : "(end)");
return (ch);
}
static int flush_request_receive(VSTREAM *client_stream, VSTRING *request)
{
int count;
/*
* Kluge: choose the protocol depending on the request size.
*/
if (read_wait(vstream_fileno(client_stream), var_ipc_timeout) < 0) {
msg_warn("timeout while waiting for data from %s",
VSTREAM_PATH(client_stream));
return (-1);
}
if ((count = peekfd(vstream_fileno(client_stream))) < 0) {
msg_warn("cannot examine read buffer of %s: %m",
VSTREAM_PATH(client_stream));
return (-1);
}
/*
* Short request: master trigger. Use the string+null protocol.
*/
if (count <= 2) {
if (vstring_get_null(request, client_stream) == VSTREAM_EOF) {
msg_warn("end-of-input while reading request from %s: %m",
VSTREAM_PATH(client_stream));
return (-1);
}
}
/*
* Long request: real flush client. Use the attribute list protocol.
*/
else {
if (attr_scan(client_stream,
ATTR_FLAG_MORE | ATTR_FLAG_STRICT,
RECV_ATTR_STR(MAIL_ATTR_REQ, request),
ATTR_TYPE_END) != 1) {
return (-1);
}
}
return (0);
}
