BPX1ATM returns the process id. You then use BPX1WAT to wait for the 
process(es) to end. 

In article <[email protected]> you wrote:
> Using BPX1ATM it's not clear to me how you know if the subtask terminates.
> The ATTACH macro has an ECB and an exit routine available.

> -----Original Message-----
> From: IBM Mainframe Discussion List [mailto:[email protected]] On
> Behalf Of David Crayford
> Sent: 21 March 2016 20:13
> To: [email protected]
> Subject: Re: Linking C module with SSL

> I'm happy I've got you working but as I said it's a circumvention. Dons
> solution is the way to go. 

> > On 21 Mar 2016, at 8:05 PM, Robin Atwood <[email protected]> wrote:
> > 
> > I first tried David's suggestion of using BPX1MSD (because that was 
> > quite
> > painless) and it worked! Each of my modules has a #pragma 
> > runops(POSIX(ON)) and a call to BPX1MSD in their initialisation 
> > routine. They are started one at a time and they all now come up and 
> > the gsk calls still work. So, for the time being, I am back in business.
> > 
> > Thanks
> > Robin
> > 
> > -----Original Message-----
> > From: IBM Mainframe Discussion List [mailto:[email protected]] 
> > On Behalf Of Don Poitras
> > Sent: 21 March 2016 18:35
> > To: [email protected]
> > Subject: Re: Linking C module with SSL
> > 
> > It's for attaching a program as a new process. To z/OS, it just looks 
> > like a new TCB that's a daughter of the caller. You can still pass it 
> > an ECB and it can run POSIX(ON). I really think this is all you need 
> > to do to get what you want.
> > 
> > In article <[email protected]> you wrote:
> >> Thanks for the suggestion. Looking at the doc BPX1ATM seems to be for 
> >> attaching a TCB to a process, which is not our situation. We need to 
> >> attach a TCB to a TCB and pass the new TCB an ECB in the usual way.
> >> However, I will bear it in mind!
> > 
> >> Thanks
> >> Robin
> > 
> >> -----Original Message-----
> >> From: IBM Mainframe Discussion List [mailto:[email protected]] 
> >> On Behalf Of Don Poitras
> >> Sent: 18 March 2016 20:49
> >> To: [email protected]
> >> Subject: Re: Linking C module with SSL
> > 
> >> Try using BPX1ATM (attach_execmvs) rather than ATTACH.
> > 
> >> In article <[email protected]> you wrote:
> >>> We have a lot of HLASM and XL/C modules doing 
> >>> attach/wait/post/detach. The
> >> problem seems to be that the POSIX(ON) is not inherited by an 
> >> attached subtask. Recoding to use threads and semaphores would 
> >> effectively be rewriting the server - I'll think I'll leave that for the
> next generation!
> >> It's a bit poor that IBM's SSL implementation does not properly 
> >> support traditional MVS programs; it's a part of TCP/IP, after all. I 
> >> tried experimenting with BPX1SDD (set_dub_default) to make TCB's 
> >> processes and threads but I still got the EDC5167I.
> > 
> >>> Thanks
> >>> Robin
> > 
> >>> -----Original Message-----
> >>> From: IBM Mainframe Discussion List 
> >>> [mailto:[email protected]] On Behalf Of David Crayford
> >>> Sent: 17 March 2016 21:18
> >>> To: [email protected]
> >>> Subject: Re: Linking C module with SSL
> > 
> >>>> On 17/03/2016 10:05 PM, Robin Atwood wrote:
> >>>> Now I have hit the problem I thought might be lurking. The module I
> >> fixed before with the POSIX(ON) pragma is the listener. It attaches a 
> >> number of worker tasks it givesockets an incoming session to. When 
> >> the worker does its takesocket it must then do a 
> >> gsk_secure_socket_open() to start the SSL handshake. This failed with 
> >> a EDC5167I so I added the
> > POSIX(ON) pragma.
> >> Restarting, the STC immediately failed in a call to BPX1MSS, rc=156, 
> >> rsn= 0D070201, which means:
> > 
> >>> I take it you are attaching your subtasks using MVS services. That 
> >>> won't
> >> happen if you use pthreads.
> > 
> >>>> JRAlreadySigSetUp: BPX1MSS found the process already set up for 
> >>>> signals
> >>>> Action: Only one task can be set up for signals at any one time.  
> >>>> Issue the signal unset (BPX1MSD) service on the task that did the 
> >>>> last setup and then reissue this service.
> >>>> 
> >>>> So it seems I can only have POSIX(ON) in one TCB? That's a bit of a 
> >>>> showstopper. :(
> >>>> 
> >>>> Thanks
> >>>> Robin
> >>>> 
> >>>> -----Original Message-----
> >>>> From: IBM Mainframe Discussion List 
> >>>> [mailto:[email protected]] On Behalf Of Charles Mills
> >>>> Sent: 14 March 2016 21:24
> >>>> To: [email protected]
> >>>> Subject: Re: Linking C module with SSL
> >>>> 
> >>>> Yup ...
> >>>> 
> >>>> Be aware that changing to POSIX(ON) will introduce other subtle 
> >>>> changes
> >> in behavior. For example, fopen()'s decision on what is a legacy 
> >> dataset and what is a UNIX file changes. I was surprised to see that 
> >> DD:SYSPRINT was now the name of a new UNIX file and happily created 
> >> it
> > under /u/! Really.
> >>>> 
> >>>>> Is this telling me SSL can only be used under USS?
> >>>> Yes, but realize that USS is z/OS, and you can have a program that 
> >>>> runs
> >> from conventional JCL and looks externally like it could have been 
> >> written in 1970 that in fact "runs under USS."
> >>>> 
> >>>> Charles
> >>>> 
> >>>> -----Original Message-----
> >>>> From: IBM Mainframe Discussion List 
> >>>> [mailto:[email protected]] On Behalf Of Robin Atwood
> >>>> Sent: Monday, March 14, 2016 2:40 AM
> >>>> To: [email protected]
> >>>> Subject: Re: Linking C module with SSL
> >>>> 
> >>>> Thanks. I had just spotted Charles's post back in 2012 with the 
> >>>> same problem and used a pragma. Now the init function fails with
> >>>> 202 (KEYRING OPEN ERROR) but that looks like an admin problem. :)
> > 
> >> --
> >> Don Poitras - SAS Development  -  SAS Institute Inc. - SAS Campus Drive
> >> [email protected]           (919) 531-5637                Cary, NC 27513

-- 
Don Poitras - SAS Development  -  SAS Institute Inc. - SAS Campus Drive
[email protected]           (919) 531-5637                Cary, NC 27513

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