On Sun, 17 May 2020 02:13:16 +0000, Seymour J Metz wrote:
>> What does it lack?
>
>ADDRESS SYSTEM "myprog" WITH INPUT STEM somefood. ,
> OUTPUT STREAM 'prg.out' ERROR STEM oops.
>
Ah! I had seen that in Regina but didn't know it is ANSI.
Must the host environment be SYSTEM?
Something I see only in z/OS UNIX Rexx is
https://www.ibm.com/support/knowledgecenter/SSLTBW_2.1.0/com.ibm.zos.v2r1.bpxb600/stream.htm
file=stream('ls | wc','c','popen read')
Regina's "popen" is just one of the ADDRESS ... STEM variants;
no stream; no concurrency.
I like pipes.
-- gil
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