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(SYSLIB) Programming Reference Manual - Public Support Login ...

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19.1.1.3. Information Returned by ATREAD Procedures<br />

The following fields of the ATREAD packet contain values returned by the SAR$<br />

ATREAD procedures to the calling program:<br />

CALL_STATUS<br />

PLUS Attribute: 18-bit status<br />

SAR$ ATREAD<br />

The status of the current call to SAR_INITIALIZE_ATREAD or SAR_ATREAD. See<br />

Table 19–3 for an explanation of the ATREAD procedure call status codes. This field<br />

may also be referenced as an 18-bit logical field with label CALL_STATUS_CODE.<br />

SUB_STATUS_CODE<br />

PLUS Attribute: 6-bit logical<br />

This field contains additional information for particular CALL_STATUS codes.<br />

IO_STATUS<br />

PLUS Attribute: 6-bit status<br />

The status of any I/O operations performed by the ATREAD procedures. See<br />

Table 19–3 for the I/O status lists. This field may also be referenced as a 6-bit logical<br />

field with label IO_STATUS_CODE.<br />

ATREAD_STATUS_WORD<br />

PLUS Attribute: word logical<br />

A one-word combination of CALL_STATUS, SUB_STATUS, and IO_STATUS<br />

contained in H2, S1, and S3, respectively.<br />

SYMB_STATUS_WORD<br />

PLUS Attribute: word logical<br />

The status word returned from an ER SYMB$ request.<br />

See SYMB$, Exec ER <strong>Programming</strong> <strong>Reference</strong> <strong>Manual</strong> for further details on the ER<br />

SYMB$ status word.<br />

RECOMMENDED_BUFFER_LENGTH<br />

PLUS Attribute: 18-bit integer<br />

The recommended buffer or table length when an invalid length is specified or when<br />

an overflow occurs.<br />

7833 1733–004 19–5

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