mirror of
https://github.com/RGBCube/serenity
synced 2025-07-25 18:17:44 +00:00
Kernel: Distinguish between new and old process groups with equal pgids
This does not add any behaviour change to the processes, but it ties a TTY to an active process group via TIOCSPGRP, and returns the TTY to the kernel when all processes in the process group die. Also makes the TTY keep a link to the original controlling process' parent (for SIGCHLD) instead of the process itself.
This commit is contained in:
parent
cf18bff72a
commit
688e54eac7
9 changed files with 176 additions and 23 deletions
72
Kernel/ProcessGroup.h
Normal file
72
Kernel/ProcessGroup.h
Normal file
|
@ -0,0 +1,72 @@
|
|||
/*
|
||||
* Copyright (c) 2020, the SerenityOS developers.
|
||||
* All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions are met:
|
||||
*
|
||||
* 1. Redistributions of source code must retain the above copyright notice, this
|
||||
* list of conditions and the following disclaimer.
|
||||
*
|
||||
* 2. Redistributions in binary form must reproduce the above copyright notice,
|
||||
* this list of conditions and the following disclaimer in the documentation
|
||||
* and/or other materials provided with the distribution.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
||||
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
||||
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
|
||||
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||||
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
|
||||
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
|
||||
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
|
||||
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
||||
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||||
*/
|
||||
|
||||
#pragma once
|
||||
|
||||
#include <AK/InlineLinkedList.h>
|
||||
#include <AK/RefCounted.h>
|
||||
#include <AK/Weakable.h>
|
||||
#include <Kernel/Lock.h>
|
||||
#include <Kernel/SpinLock.h>
|
||||
#include <Kernel/UnixTypes.h>
|
||||
|
||||
namespace Kernel {
|
||||
|
||||
class ProcessGroup
|
||||
: public RefCounted<ProcessGroup>
|
||||
, public Weakable<ProcessGroup>
|
||||
, public InlineLinkedListNode<ProcessGroup> {
|
||||
|
||||
AK_MAKE_NONMOVABLE(ProcessGroup);
|
||||
AK_MAKE_NONCOPYABLE(ProcessGroup);
|
||||
|
||||
friend InlineLinkedListNode<ProcessGroup>;
|
||||
|
||||
public:
|
||||
~ProcessGroup();
|
||||
|
||||
static NonnullRefPtr<ProcessGroup> create(ProcessGroupID);
|
||||
static NonnullRefPtr<ProcessGroup> find_or_create(ProcessGroupID);
|
||||
static ProcessGroup* from_pgid(ProcessGroupID);
|
||||
|
||||
const ProcessGroupID& pgid() const { return m_pgid; }
|
||||
|
||||
private:
|
||||
ProcessGroup(ProcessGroupID pgid)
|
||||
: m_pgid(pgid)
|
||||
{
|
||||
}
|
||||
|
||||
ProcessGroup* m_prev { nullptr };
|
||||
ProcessGroup* m_next { nullptr };
|
||||
|
||||
ProcessGroupID m_pgid;
|
||||
};
|
||||
|
||||
extern InlineLinkedList<ProcessGroup>* g_process_groups;
|
||||
extern RecursiveSpinLock g_process_groups_lock;
|
||||
|
||||
}
|
Loading…
Add table
Add a link
Reference in a new issue