[Tarantool-patches] [PATCH 0/5] popen: Add ability to run external process

[Cyrill Gorcunov <gorcunov@gmail.com>]

In this series we provide a way to execute external binaries
from inside of Lua scripts, control children process and
communicate with their stdin/out/err streams.

The series is preliminary since there are known issues
I have to resolve before merging. Still to share code
early I decided to post them even in such shape.

While I'm more-less sure about stability of the engine
itself (which lays in src/lib/core/popen.c) the lua interface
which sits in src/lua/fio.lua looks not that convenient I think.

All created popen objects require explicit popen:close call
probably I should hook up lua GC (as I being advised).

Anyway please take a look once time permit. Any comments
are highly appreciated.

All patches are sitting in branch gorcunov/gh-4031-popen

Cyrill Gorcunov (5):
  popen: Introduce a backend engine
  lua/fio: Add lbox_fio_push_error as a separate helper
  popen/fio: Merge popen engine into fio internal module
  popen/fio: Implement lua interface for a popen object
  test: Add app/popen test

 src/lib/core/CMakeLists.txt |    1 +
 src/lib/core/coio_file.c    |  155 +++++
 src/lib/core/coio_file.h    |   10 +
 src/lib/core/popen.c        | 1204 +++++++++++++++++++++++++++++++++++
 src/lib/core/popen.h        |  135 ++++
 src/lua/fio.c               |  250 +++++++-
 src/lua/fio.lua             |  434 +++++++++++++
 src/main.cc                 |    4 +
 test/app/popen.result       |  105 +++
 test/app/popen.test.lua     |   39 ++
 10 files changed, 2333 insertions(+), 4 deletions(-)
 create mode 100644 src/lib/core/popen.c
 create mode 100644 src/lib/core/popen.h
 create mode 100644 test/app/popen.result
 create mode 100644 test/app/popen.test.lua

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2.20.1