Rational Developer for System z
Enterprise PL/I for z/OS, Version 4.2, Programming Guide

Using the ATTACH statement

The ATTACH statement in a PL/I program uses the underlying pthread library to perform thread management. When the ATTACH statement is issued, the pthread library tries to allocate standard C stream files.

After the ATTACH statement is issued, any attempt to open SYSIN by the application fails when SYSIN is an instream file that is allocated to the SYSIN DD in JCL (for example, //SYSIN DD * or //SYSIN DD DATA). A SYSIN OPEN FAILED error is issued.


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