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From: Victor Porton <porton@narod.ru>
Newsgroups: comp.lang.ada
Subject: Execute an OS command and capture output
Date: Mon, 13 Nov 2017 18:38:48 +0200
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Xref: feeder.eternal-september.org comp.lang.ada:48853
Date: 2017-11-13T18:38:48+02:00
List-Id: <comp.lang.ada>

I need a (preferably portable, but only Linux would be well) way to execute 
an OS command with some input in stdin which I provide and capture the 
output from stdout.

Note that stdin and stdout may possibly pass NUL characters.

I am interested in both shell commands for different shells and in direct 
(such as execve()) execution of a command.

-- 
Victor Porton - http://portonvictor.org