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Refactor TTY signal generation a bit.

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We now respect the VINTR and VQUIT control characters in the termios.
This commit is contained in:
Andreas Kling 2018-11-16 20:18:58 +01:00
parent 4e2c2b9748
commit a788e85c09
7 changed files with 51 additions and 30 deletions
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35
Kernel/TTY.cpp
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@ -37,6 +37,8 @@ TTY::TTY(unsigned major, unsigned minor)
{
memset(&m_termios, 0, sizeof(m_termios));
m_termios.c_lflag |= ISIG | ECHO;
static const char default_cc[32] = "\003\034\177\025\004\0\1\0\021\023\032\0\022\017\027\026\0";
memcpy(m_termios.c_cc, default_cc, sizeof(default_cc));
}
TTY::~TTY()
@ -64,23 +66,32 @@ bool TTY::hasDataAvailableForRead() const
void TTY::emit(byte ch)
{
if (should_generate_signals()) {
if (ch == m_termios.c_cc[VINTR]) {
dbgprintf("%s: VINTR pressed!\n", ttyName().characters());
generate_signal(SIGINT);
return;
}
if (ch == m_termios.c_cc[VQUIT]) {
dbgprintf("%s: VQUIT pressed!\n", ttyName().characters());
generate_signal(SIGQUIT);
return;
}
}
m_buffer.write(&ch, 1);
}
void TTY::interrupt()
void TTY::generate_signal(int signal)
{
if (!should_generate_signals())
if (!pgid())
return;
dbgprintf("%s: Interrupt ^C pressed!\n", ttyName().characters());
if (pgid()) {
dbgprintf("%s: Send SIGINT to everyone in pgrp %d\n", ttyName().characters(), pgid());
InterruptDisabler disabler;
Process::for_each_in_pgrp(pgid(), [this] (auto& process) {
dbgprintf("%s: Send SIGINT to %d\n", ttyName().characters(), process.pid());
process.send_signal(SIGINT, nullptr);
return true;
});
}
dbgprintf("%s: Send signal %d to everyone in pgrp %d\n", ttyName().characters(), signal, pgid());
InterruptDisabler disabler; // FIXME: Iterate over a set of process handles instead?
Process::for_each_in_pgrp(pgid(), [&] (auto& process) {
dbgprintf("%s: Send signal %d to %d\n", ttyName().characters(), signal, process.pid());
process.send_signal(signal, nullptr);
return true;
});
}
void TTY::set_termios(const Unix::termios& t)