How do we check the file status code in Assembler

ap_mainframes · Posted: Tue Sep 12, 2006 4:40 pm

Hi,

How do we check the file status code in Assembler???
I mean, if I open a file, then in COBOL we check if the open was sucessful using file status code, which we mention in SELECT clause.

How do we do that in Assembler??? how do I check if my file operation was sucessful???

Thanks for all the info you can provide.

ap_mainframes

UmeySan · Posted: Wed Sep 13, 2006 2:07 pm

Hi !

Example:

OPEN IN01(INPUT)
LTR R15,R15 ...CODE IN R15
BZ DoSomeThing ...R15 = Zero = Ok

... ... ...

CLOSE IN01
LTR R15,R15 ...CODE IN R15
BZ StopRun ...R15 = Zero = Ok ...R15 = NULL IST OK

ap_mainframes · Posted: Wed Sep 13, 2006 3:12 pm

Thanks! But why only Register 15???
Cant it be anything other than R15 ???Does the return code come in R15 only??? Why not in other registers???

UmeySan · Posted: Wed Sep 13, 2006 3:39 pm

Cause you are using IBM-Systemmacros. These macros or programmse alle apply to the standard IBM Register conventions.

Regards, UmeySan