Charles Mills wrote: > Is there a way to determine if a DD statement has been allocated DUMMY, > short of SVC 99 info retrieval?
Sometimes I use the minimum call type of the DEVTYPE macro, and test for zeros being returned, as per the DFSMSdfp Advanced Services manual. To be pedantic, I suppose I am assuming that file is not a "TCAM application process queue". The first fullword is documented as (hex) 0 - DUMMY (or that TCAM thing) 101 - TSO terminal 102 - subsystem eg. SYSIN, SYSOUT 103 - UNIX with the last three supporting a maximum blocksize of 32760. I'll have to try a DEVTYPE with /dev/null one day... Gil's remarks warn us that it may return the data for DUMMY, whereas is could be argued that it should return the data for UNIX. Cheers, Greg ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
