User`s guide

4: Record Transfer Interface (BSCRTI)

DC 900-1406E 89

dtime This is a pointer to a descriptor. It is a character string containing the

timeout value in the following time string format:

VMS format:

dddd hh:mm:ss

UNIX format: hh:mm:ss

dak This is a longword containing the DAK node indicator. If the indica-

tor is 1, data acknowledgments are read from the DAK node; other-

wise, they are read from the link’s read node.

Return Codes

See Table 5–2 on page 95 for full descriptions of the error return codes.

Success RCOK

Failure RCNAS, RCILPAR, RCOVRSZ, RCUNR, RCTO, RCQ_WWR,

RCQ_RDTO

Caution

User applications that receive the RCUNR (non-fatal) return from

BSCWRIT can cancel the SEND process by calling BSCRESET and

issuing a Flush Queue command (command code 37).

Alternatively, the application can handle the unexpected response

contained in the

rdblock parameter. Then, to complete the inter-

rupted SEND process, the same BSCWRIT call should be repeated

until the return code is RCOK. This ensures that the expected data

acknowledgment is received.

The C code fragment shown below illustrates the proper use of

BSCWRIT to handle unexpected responses from the ICP while

sending a ﬁle.