$EcbTest
$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)