$EcbTest: Difference between revisions
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==Syntax== | ==Syntax== | ||
<p class=" | <p class="syntax">$EcbTest(<span class="term">ECB-number</span> | 'CPQZ' | 'QZSIG') | ||
</p> | </p> | ||
<p> | <p> | ||
Where:</p> | Where:</p> | ||
<ul> | <ul> | ||
<li>ECB-number is a string with a numeric value from one to the NECBS parameter that identifies which ECB to test for its post status. The ECB-number can be expressed as a numeric literal, a %variable, or a field name.</li> | <li><var class="term">ECB-number</var> is a string with a numeric value from one to the <var>[[NECBS and NOECBS parameters|NECBS]]</var> parameter that identifies which ECB to test for its post status. The <var class="term">ECB-number</var> value can be expressed as a numeric literal, a %variable, or a field name.</li> | ||
<li>CPQZ is a named ECB used by the NonStop/204 facility to automatically post an extended quiesce | <li><var>CPQZ</var> is a named ECB used by the [[NonStop/204 facility to automatically post an extended quiesce. To use CPQZ, you need not set the <var>NECBS</var> parameter. <var>CPQZ</var> can be expressed as a literal, a %variable, or a field name. </li> | ||
<li>QZSIG is a named ECB used by the | <li><var>QZSIG</var> is a named ECB used by the [[System and media recovery#Media recovery NonStop/204|NonStop/204]] facility to signal when an external backup is completed. To use <var>QZSIG</var>, you need not set the <var>NECBS</var> parameter. <var>QZSIG</var> can be expressed as a literal, a %variable, or a field name. </li> | ||
</ul> | </ul> | ||
Revision as of 19:13, 3 November 2014
$EcbTest checks an Event Control Block (ECB) to see if it is posted
Syntax
$EcbTest(ECB-number | 'CPQZ' | 'QZSIG')
Where:
- ECB-number is a string with a numeric value from one to the NECBS parameter that identifies which ECB to test for its post status. The ECB-number value 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. To use CPQZ, you need not set the NECBS parameter. CPQZ can be expressed as a literal, a %variable, or a field name.
- QZSIG is a named ECB used by the NonStop/204 facility to signal when an external backup is completed. To use QZSIG, you need not set the NECBS parameter. QZSIG can be expressed as a literal, a %variable, or a field name.
Usage
Use the $EcbTest function to obtain ECB status, posted or not, through the return code. The post code, if set by $Post, is accessible using the $StatusD function. The following return codes apply to the $EcbTest function:
| Return code | Meaning |
|---|---|
| 0 | Not posted |
| 1 | Posted |
| 2 | Bad argument specified |
| 3 | NECBS parameter is not specified or is zero |
| 4 | The first argument is less than one or greater than the NECBS parameter |
| 5 | NUSERS = 1 |
| 8 | No argument specified |
| 9 | Checkpointing inactive, if using extended quiesce named ECBs, CPQZ or QZSIG |
Example
%rc=$Ecbtest(1)