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Kernel: Closing a MasterPTY should generate a TTY hangup.

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This commit is contained in:
Andreas Kling 2019-02-05 12:55:19 +01:00
parent 378e20c535
commit 2a0700af9a
Notes: sideshowbarker 2024-07-19 15:51:26 +09:00 
Author: https://github.com/awesomekling
Commit: https://github.com/SerenityOS/serenity/commit/2a0700af9ac
4 changed files with 13 additions and 3 deletions
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4
Kernel/MasterPTY.cpp
View file

@ -3,6 +3,7 @@
#include "PTYMultiplexer.h"
#include <Kernel/Process.h>
#include <LibC/errno_numbers.h>
#include <LibC/signal_numbers.h>
MasterPTY::MasterPTY(unsigned index)
: CharacterDevice(10, index)
@ -73,8 +74,11 @@ bool MasterPTY::can_write_from_slave() const
void MasterPTY::close()
{
if (retain_count() == 2) {
InterruptDisabler disabler;
// After the closing FileDescriptor dies, slave is the only thing keeping me alive.
// From this point, let's consider ourselves closed.
m_closed = true;
m_slave->hang_up();
}
}

2
Kernel/Process.h
View file

@ -87,7 +87,7 @@ public:
bool is_blocked() const
{
return m_state == BlockedSleep || m_state == BlockedWait || m_state == BlockedRead || m_state == BlockedSignal || m_state == BlockedSelect;
return m_state == BlockedSleep || m_state == BlockedWait || m_state == BlockedRead || m_state == BlockedWrite || m_state == BlockedSignal || m_state == BlockedSelect;
}
PageDirectory& page_directory() { return *m_page_directory; }

5
Kernel/TTY.cpp
View file

@ -161,3 +161,8 @@ void TTY::set_size(unsigned short columns, unsigned short rows)
m_rows = rows;
m_columns = columns;
}
void TTY::hang_up()
{
generate_signal(SIGHUP);
}

5
Kernel/TTY.h
View file

@ -30,6 +30,7 @@ public:
bool in_canonical_mode() const { return m_termios.c_lflag & ICANON; }
void set_default_termios();
void hang_up();
protected:
virtual void on_tty_write(const byte*, size_t) = 0;
@ -38,12 +39,12 @@ protected:
TTY(unsigned major, unsigned minor);
void emit(byte);
void generate_signal(int signal);
private:
// ^CharacterDevice
virtual bool is_tty() const final override { return true; }
void generate_signal(int signal);
DoubleBuffer m_buffer;
pid_t m_pgid { 0 };
termios m_termios;