You could use the cat "//'zos.dsname'" and it will either work on you will get 
a error message:

/u/user/cat "//'USER.TEST'"   
cat: //'USER.TEST': EDC5049I The specified file name could not be located.   


Lionel B. Dyck <sdg><
Website: http://www.lbdsoftware.com

"Worry more about your character than your reputation.  Character is what you 
are, reputation merely what others think you are." - John Wooden

-----Original Message-----
From: IBM Mainframe Discussion List <[email protected]> On Behalf Of 
[email protected]
Sent: Tuesday, July 2, 2019 8:37 AM
To: [email protected]
Subject: USS script : how to test that a MVS Dataset exists ?

Hello,I would like to "test" if a MVS Dataset exist (is catalogued) during the 
/etc/rc script. 
As far as I know, since /etc/rc script run during USS initialisation, TSO 
services are not yet available. So I cannot use the "tso" Unix command to issue 
a LISTCAT.
Actualy my need is to perform a mount command in this process. But I do not 
want to return Error messages, if the HFS/ZFS doesn't exist. That's why I need 
to test that the dataset is catalogued/exist before calling the Mount service.

Do you have any idea ?
Regards,Laurent

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