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https://github.com/LadybirdBrowser/ladybird.git
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715e11f692
This patchset makes the shell capable of lazily resolving and executing sequences of commands, to allow for putting logical sequences in the background. In particular, it enables And/Or/Sequence nodes to be run in the background, and consequently unmarks them as `would_execute`. Doing so also fixes job control to an extent, as jobs are now capable of having 'tails', so sequences can be put in the background while preserving their following sequences.
129 lines
4.2 KiB
C++
129 lines
4.2 KiB
C++
/*
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* Copyright (c) 2020, The SerenityOS developers.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include "Execution.h"
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#include "Forward.h"
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#include <AK/Function.h>
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#include <AK/JsonObject.h>
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#include <AK/JsonValue.h>
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#include <AK/OwnPtr.h>
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#include <AK/String.h>
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#include <LibCore/ElapsedTimer.h>
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#include <LibCore/Object.h>
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#define JOB_TIME_INFO
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#ifndef __serenity__
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# undef JOB_TIME_INFO
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#endif
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struct LocalFrame;
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class Job : public RefCounted<Job> {
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public:
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static NonnullRefPtr<Job> create(pid_t pid, pid_t pgid, String cmd, u64 job_id, AST::Command&& command) { return adopt(*new Job(pid, pgid, move(cmd), job_id, move(command))); }
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~Job()
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{
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#ifdef JOB_TIME_INFO
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if (m_active) {
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auto elapsed = m_command_timer.elapsed();
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dbg() << "Command \"" << m_cmd << "\" finished in " << elapsed << " ms";
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}
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#endif
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}
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Function<void(RefPtr<Job>)> on_exit;
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pid_t pgid() const { return m_pgid; }
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pid_t pid() const { return m_pid; }
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const String& cmd() const { return m_cmd; }
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const AST::Command& command() const { return *m_command; }
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AST::Command* command_ptr() { return m_command; }
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u64 job_id() const { return m_job_id; }
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bool exited() const { return m_exited; }
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bool signaled() const { return m_term_sig != -1; }
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int exit_code() const
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{
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ASSERT(exited());
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return m_exit_code;
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}
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int termination_signal() const
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{
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ASSERT(signaled());
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return m_term_sig;
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}
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bool should_be_disowned() const { return m_should_be_disowned; }
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void disown() { m_should_be_disowned = true; }
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bool is_running_in_background() const { return m_running_in_background; }
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bool should_announce_exit() const { return m_should_announce_exit; }
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bool is_suspended() const { return m_is_suspended; }
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void unblock() const;
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Core::ElapsedTimer& timer() { return m_command_timer; }
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void set_has_exit(int exit_code);
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void set_signalled(int sig);
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void set_is_suspended(bool value) const { m_is_suspended = value; }
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void set_running_in_background(bool running_in_background)
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{
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m_running_in_background = running_in_background;
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}
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void set_should_announce_exit(bool value) { m_should_announce_exit = value; }
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void deactivate() const { m_active = false; }
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enum class PrintStatusMode {
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Basic,
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OnlyPID,
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ListAll,
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};
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bool print_status(PrintStatusMode);
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private:
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Job(pid_t pid, unsigned pgid, String cmd, u64 job_id, AST::Command&& command);
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pid_t m_pgid { 0 };
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pid_t m_pid { 0 };
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u64 m_job_id { 0 };
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String m_cmd;
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bool m_exited { false };
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bool m_running_in_background { false };
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bool m_should_announce_exit { false };
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int m_exit_code { -1 };
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int m_term_sig { -1 };
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Core::ElapsedTimer m_command_timer;
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mutable bool m_active { true };
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mutable bool m_is_suspended { false };
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bool m_should_be_disowned { false };
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OwnPtr<AST::Command> m_command;
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};
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