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# lrt_tpgetrply

Communication Functions

Returns a reply from a previously sent request.

int lrt_tpgetrply( int *cd, char **data, long *len, long flags );

cd | Call descriptor for the request.
data | Reply data.
len | Length of received data.
flags | Valid flags: TPGETANY - ignore cd and return any available reply, TPNOCHANGE - buffer type of reply data is not allowed to change, TPNBLOCK - request not sent if blocking condition exists, TPNOTIME - caller immune to blocking timeouts, TPSIGRSTRT - any interrupted system calls are re-issued after lrt_tpgetrply.

The lrt_tpgetrply function returns a reply from a previously sent request.

## Return Values

If the function succeeds, it returns a reply. If the function ends with an error, it returns -1 and sets the error code in tperrno.

## Parameterization

You cannot use standard parameterization for any arguments in this function.

## Example

In the following example, the lrt_tpgetrply function returns a reply from the service request to allocate a new buffer for a string.

vuser_init()

Copy code

    {
    char* data_0;
    char* data_1;
    long buflen;
    int cd;
    char string[] = "This is a string.";
    data_0 = lrt_tpalloc("STRING", "", sizeof(string));
    // Send a request, but cancel it afterwards
    lrt_strcpy(data_0, string);
    cd = lrt_tpacall("TOUPPER", data_0, 0, 0);
    lrt_tpcancel(cd);
    // Send a request, and look at reply
    data_1 = lrt_tpalloc("STRING", "", 1024);
    lrt_tpgetrply(&cd, &data_1, &olen, 0);
    buflen = lrt_tptypes(data_1, type, NULL);
    lr_output_message("The reply buffer type is %s, size is %lu.", type, buflen);
        return 0;

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