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Kernel: use termios c_cc values instead of hardcoded characters

This commit is contained in:
Bananymous 2025-06-02 15:54:11 +03:00
parent e473118ec8
commit fb466b5af7
5 changed files with 93 additions and 44 deletions
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14
kernel/include/kernel/Terminal/TTY.h
View File

@ -12,6 +12,20 @@
namespace Kernel
{
#define TTY_DEFAULT_TERMIOS_CC { \
[VEOF] = '\x04', /* ctrl+D */ \
[VEOL] = '\0', \
[VERASE] = '\b', \
[VINTR] = '\x03', /* ctrl+C */ \
[VKILL] = '\x15', /* ctrl+U */ \
[VMIN] = 0, \
[VQUIT] = '\x1c', /* ctrl+\ */ \
[VSTART] = '\x11', /* ctrl+Q */ \
[VSTOP] = '\x13', /* ctrl+S */ \
[VSUSP] = '\x1a', /* ctrl+Z */ \
[VTIME] = 0 \
}
class TTY : public CharacterDevice
{
public:

4
kernel/kernel/Terminal/PseudoTerminal.cpp
View File

@ -162,8 +162,8 @@ namespace Kernel
.c_iflag = 0,
.c_oflag = 0,
.c_cflag = CS8,
.c_lflag = ECHO | ICANON,
.c_cc = {},
.c_lflag = ECHO | ICANON | ISIG,
.c_cc = TTY_DEFAULT_TERMIOS_CC,
.c_ospeed = B38400,
.c_ispeed = B38400,
}, mode, uid, gid)

4
kernel/kernel/Terminal/Serial.cpp
View File

@ -174,8 +174,8 @@ namespace Kernel
.c_iflag = ICRNL,
.c_oflag = OPOST | ONLCR,
.c_cflag = CS8,
.c_lflag = ECHO | ICANON,
.c_cc = {},
.c_lflag = ECHO | ICANON | ISIG,
.c_cc = TTY_DEFAULT_TERMIOS_CC,
.c_ospeed = B38400,
.c_ispeed = B38400,
}, 0600, 0, 0)

111
kernel/kernel/Terminal/TTY.cpp
View File

@ -18,6 +18,9 @@
#include <sys/epoll.h>
#include <sys/sysmacros.h>
#define NL '\n'
#define CR '\r'
namespace Kernel
{
@ -216,53 +219,85 @@ namespace Kernel
void TTY::handle_input_byte(uint8_t ch)
{
if (ch == 0)
if (ch == _POSIX_VDISABLE)
return;
LockGuard _(m_mutex);
if ((m_termios.c_iflag & ISTRIP))
ch &= 0x7F;
if ((m_termios.c_iflag & IGNCR) && ch == '\r')
return;
uint8_t conv = ch;
if ((m_termios.c_iflag & ICRNL) && ch == '\r')
conv = '\n';
if ((m_termios.c_iflag & INLCR) && ch == '\n')
conv = '\r';
ch = conv;
// ^C
if (ch == '\x03')
if (m_termios.c_lflag & ICANON)
{
if (auto ret = Process::kill(-m_foreground_pgrp, SIGINT); ret.is_error())
dwarnln("TTY: {}", ret.error());
return;
if ((m_termios.c_iflag & ISTRIP))
ch &= 0x7F;
if ((m_termios.c_iflag & IGNCR) && ch == CR)
return;
uint8_t conv = ch;
if ((m_termios.c_iflag & ICRNL) && ch == CR)
conv = NL;
if ((m_termios.c_iflag & INLCR) && ch == NL)
conv = CR;
ch = conv;
}
// ^D + canonical
if (ch == '\x04' && (m_termios.c_lflag & ICANON))
if (m_termios.c_lflag & ISIG)
{
m_output.flush = true;
epoll_notify(EPOLLIN);
m_output.thread_blocker.unblock();
return;
int sig = -1;
if (ch == m_termios.c_cc[VINTR])
sig = SIGINT;
if (ch == m_termios.c_cc[VQUIT])
sig = SIGQUIT;
if (ch == m_termios.c_cc[VSUSP])
sig = SIGTSTP;
if (sig != -1)
{
if (auto ret = Process::kill(-m_foreground_pgrp, sig); ret.is_error())
dwarnln("TTY: {}", ret.error());
return;
}
}
// backspace + canonical
if (ch == '\b' && (m_termios.c_lflag & ICANON))
bool should_append = true;
bool should_flush = false;
bool force_echo = false;
if (!(m_termios.c_lflag & ICANON))
should_flush = true;
else
{
do_backspace();
return;
if (ch == m_termios.c_cc[VERASE] && (m_termios.c_lflag & ECHOE))
return do_backspace();
//if (ch == m_termios.c_cc[VKILL] && (m_termios.c_lflag & ECHOK))
// ;
if (ch == m_termios.c_cc[VEOF])
{
should_append = false;
should_flush = true;
}
if (ch == NL || ch == m_termios.c_cc[VEOL])
{
should_append = true;
should_flush = true;
force_echo = !!(m_termios.c_lflag & ECHONL);
ch = NL;
}
}
// FIXME: don't ignore these bytes
if (m_output.bytes >= m_output.buffer.size())
return;
// TODO: terminal suspension with VSTOP/VSTART
m_output.buffer[m_output.bytes++] = ch;
if (should_append)
{
// FIXME: don't ignore these bytes
if (m_output.bytes >= m_output.buffer.size())
{
dwarnln("TTY input full");
return;
}
m_output.buffer[m_output.bytes++] = ch;
}
if (m_termios.c_lflag & ECHO)
if (force_echo || (m_termios.c_lflag & ECHO))
{
if ((ch <= 31 || ch == 127) && ch != '\n')
{
@ -288,7 +323,7 @@ namespace Kernel
}
}
if (ch == '\n' || !(m_termios.c_lflag & ICANON) || m_output.bytes == m_output.buffer.size())
if (should_flush)
{
m_output.flush = true;
epoll_notify(EPOLLIN);
@ -346,10 +381,10 @@ namespace Kernel
return true;
if (m_termios.c_oflag & OPOST)
{
if ((m_termios.c_oflag & ONLCR) && ch == '\n')
return putchar_impl('\r') && putchar_impl('\n');
if ((m_termios.c_oflag & OCRNL) && ch == '\r')
return putchar_impl('\n');
if ((m_termios.c_oflag & ONLCR) && ch == NL)
return putchar_impl(CR) && putchar_impl(NL);
if ((m_termios.c_oflag & OCRNL) && ch == CR)
return putchar_impl(NL);
}
return putchar_impl(ch);
}
@ -372,7 +407,7 @@ namespace Kernel
size_t to_copy = max_to_copy;
if (m_termios.c_lflag & ICANON)
for (to_copy = 1; to_copy < max_to_copy; to_copy++)
if (m_output.buffer[to_copy - 1] == '\n')
if (m_output.buffer[to_copy - 1] == NL)
break;
memcpy(buffer.data(), m_output.buffer.data(), to_copy);

4
kernel/kernel/Terminal/VirtualTTY.cpp
View File

@ -40,8 +40,8 @@ namespace Kernel
.c_iflag = 0,
.c_oflag = 0,
.c_cflag = CS8,
.c_lflag = ECHO | ICANON,
.c_cc = {},
.c_lflag = ECHO | ICANON | ISIG,
.c_cc = TTY_DEFAULT_TERMIOS_CC,
.c_ospeed = B38400,
.c_ispeed = B38400,
}, 0600, 0, 0)