mirror of
https://github.com/matrix-construct/construct
synced 2024-05-19 19:33:45 +02:00
113 lines
2.8 KiB
C++
113 lines
2.8 KiB
C++
// The Construct
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//
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// Copyright (C) The Construct Developers, Authors & Contributors
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// Copyright (C) 2016-2020 Jason Volk <jason@zemos.net>
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//
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// Permission to use, copy, modify, and/or distribute this software for any
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// purpose with or without fee is hereby granted, provided that the above
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// copyright notice and this permission notice is present in all copies. The
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// full license for this software is available in the LICENSE file.
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#pragma once
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#define HAVE_IRCD_EXEC_H
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namespace ircd
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{
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struct exec;
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mutable_buffer read(exec &, const mutable_buffer &);
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const_buffer write(exec &, const const_buffer &);
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}
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// Forward declarations for boost because it is not included here.
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namespace boost::process
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{
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struct child;
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namespace detail::posix { struct async_pipe; }
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namespace detail::windows { struct async_pipe; }
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using detail::posix::async_pipe; //TODO: XXX
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}
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/// Subprocess interface.
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///
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struct ircd::exec
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:instance_list<ircd::exec>
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{
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struct opts;
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struct handler;
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using args = vector_view<const string_view>;
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using const_buffers = vector_view<const const_buffer>;
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using mutable_buffers = vector_view<const mutable_buffer>;
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static log::log log;
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static uint64_t id_ctr;
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uint64_t id {0};
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std::unique_ptr<opts> opt;
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std::string path;
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std::vector<std::string> argv;
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std::unique_ptr<pair<boost::process::async_pipe>> pipe;
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std::unique_ptr<boost::process::child> child;
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std::exception_ptr eptr;
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ctx::dock dock;
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long pid {-1L}; // > 0 when running; <= 0 during exec/halt
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long code {0}; // set on exit
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public:
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size_t read(const mutable_buffers &);
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size_t write(const const_buffers &);
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bool signal(const int &sig);
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long join(const int &sig = 0); // returns exit code
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long run(); // returns pid or throws
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exec(const args &, const opts &);
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exec(const args &);
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exec(exec &&) = delete;
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exec(const exec &) = delete;
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exec &operator=(exec &&) = delete;
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exec &operator=(const exec &) = delete;
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~exec() noexcept;
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};
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template<>
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decltype(ircd::exec::list)
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ircd::instance_list<ircd::exec>::list;
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/// Exec options
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///
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struct ircd::exec::opts
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{
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/// Child executions will be logged at this level (use DEBUG to quiet)
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ircd::log::level exec_log_level = ircd::log::level::NOTICE;
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/// Child exits will be logged at this level (use DEBUG to quiet); note
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/// non-zero exits are still logged with level::ERROR.
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ircd::log::level exit_log_level = ircd::log::level::INFO;
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};
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inline
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ircd::exec::exec(const args &args)
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:exec{args, opts{}}
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{}
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inline ircd::const_buffer
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ircd::write(exec &p,
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const const_buffer &buf)
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{
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return const_buffer
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{
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data(buf), p.write(vector_view<const const_buffer>{&buf, 1})
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};
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}
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inline ircd::mutable_buffer
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ircd::read(exec &p,
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const mutable_buffer &buf)
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{
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return mutable_buffer
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{
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data(buf), p.read(vector_view<const mutable_buffer>{&buf, 1})
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};
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}
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