$EcbDGet: Difference between revisions
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<var>$ | <var>$EcbDGet</var> gets string data associated with an Event Control Block (ECB). | ||
==Syntax== | ==Syntax== | ||
<p class="code">$ | <p class="code">$EcbDGetT(ECB-number | 'CPQZ') | ||
</p> | </p> | ||
<p>Where:</p> | <p>Where:</p> | ||
| Line 10: | Line 10: | ||
<li>CPQZ is a named ECB used by the NonStop/204 facility to automatically post an extended quiesce. See [[System and media recovery#Media recovery NonStop/204|Media recovery NonStop/204]] for an explanation of the facility. | <li>CPQZ is a named ECB used by the NonStop/204 facility to automatically post an extended quiesce. See [[System and media recovery#Media recovery NonStop/204|Media recovery NonStop/204]] for an explanation of the facility. | ||
<p> | <p> | ||
To use CPQZ, you need not set the NECBS parameter. CPQZ can be expressed as a literal, a %variable, or a field name. When CPQZ is specified, the value of the <var>$ | To use CPQZ, you need not set the NECBS parameter. CPQZ can be expressed as a literal, a %variable, or a field name. When CPQZ is specified, the value of the <var>$EcbDGet</var> function can be non-null (except for error values) during only extended quiesce. CPQZ is internally cleared to null when the system exits extended quiesce.</p></li> | ||
</ul> | </ul> | ||
==Usage== | ==Usage== | ||
<p> | <p> | ||
When the <var>$ | When the <var>$EcbDGet</var> function is successful, it returns your data as a text string up to 255 bytes long. If you make a coding mistake, you may receive one of the following return codes as a string.</p> | ||
<table> | <table> | ||
<tr class="head"> | <tr class="head"> | ||
| Line 57: | Line 57: | ||
</table> | </table> | ||
<p> | <p> | ||
The <var>$ | The <var>$EcbDGet</var> function retrieves data set by either the $ECBDSET or $POST functions for the specified ECB.</p> | ||
==Example== | ==Example== | ||
Revision as of 20:14, 8 September 2014
$EcbDGet gets string data associated with an Event Control Block (ECB).
Syntax
$EcbDGetT(ECB-number | 'CPQZ')
Where:
- ECB-number is a string with a numeric value from one to the NECBS parameter that identifies the ECB from which to retrieve the text. The ECB-number can be expressed as a numeric literal, a %variable, or a field name.
- CPQZ is a named ECB used by the NonStop/204 facility to automatically post an extended quiesce. See Media recovery NonStop/204 for an explanation of the facility.
To use CPQZ, you need not set the NECBS parameter. CPQZ can be expressed as a literal, a %variable, or a field name. When CPQZ is specified, the value of the $EcbDGet function can be non-null (except for error values) during only extended quiesce. CPQZ is internally cleared to null when the system exits extended quiesce.
Usage
When the $EcbDGet function is successful, it returns your data as a text string up to 255 bytes long. If you make a coding mistake, you may receive one of the following return codes as a string.
| Return code | Meaning |
|---|---|
| 2 | Bad argument specified |
| 3 | NECBS parameter is not specified or is zero |
| 4 | The input argument is less than one or greater than the NECBS parameter |
| 5 | NUSERS = 1 |
| 8 | No argument specified |
| 9 | Checkpoints are inactive, if using extended quiesce ECB named CPQZ |
| 12 | Invalid argument CPQZ or invalid argument following QZSIG. |
The $EcbDGet function retrieves data set by either the $ECBDSET or $POST functions for the specified ECB.
Example
%x = $Ecbdget(17)