how to check that a file opening in assembler is successful.

gokuldass · New User Joined: 18 Mar 2005 Posts: 45 Location: india

how to check that a file opening in assembler is successful.

for example..
if i hadn't specified the go.dd statement in my jcl but i am trying to the file in my assembler program.. then how to check the open status..
this is an assembler question asked in convansys,chennai..

is there is anyway to declare a file status in assembler..

somasundaran_k · Active User Joined: 03 Jun 2003 Posts: 141

Yes you can. Check this link.
http://publibz.boulder.ibm.com/cgi-bin/bookmgr_OS390/BOOKS/DGT2D510/APPENDIX1.2.1?SHELF=DGT2BK21&DT=20020110113324

hth
-Som

David P · Posted: Fri May 06, 2005 10:17 am Post subject:

Hi
When we use OPEN/CLOSE macro the return code is set in register 15. Hence you can test the register 15 to check if the open/close was successful.

Consider the code given below;

OPEN (VSAMFILE,(INPUT))
LTR R15,R15
BNZ BADOPEN

Please let me know if you have something to add to it..
regards,
David.

gokuldass · New User Joined: 18 Mar 2005 Posts: 45 Location: india

hi guys..
thanks for ur reply..
i had one more question i want to print the binary data. my input is binary and output should be binary..

Bharanidharan

You can use the TESTCB macro. 4th bit in 49th byte of DCBOFLGS will be set to 1. You can use "TM DCBOFLGS,X'10'" instruction to test if DS is opened.[/img]

gokuldass · New User Joined: 18 Mar 2005 Posts: 45 Location: india

Hi Bharani,

an u provide me an example to display the binary data.

Thanks in advance.
Gokul