#include "lldb/Host/Terminal.h"
#include "lldb/Host/Config.h"
#include <fcntl.h>
#include <unistd.h>
#include <signal.h>
#ifdef LLDB_CONFIG_TERMIOS_SUPPORTED
#include <termios.h>
#endif
using namespace lldb_private;
bool
Terminal::IsATerminal () const
{
return m_fd >= 0 && ::isatty (m_fd);
}
bool
Terminal::SetEcho (bool enabled)
{
if (FileDescriptorIsValid())
{
#ifdef LLDB_CONFIG_TERMIOS_SUPPORTED
if (IsATerminal ())
{
struct termios fd_termios;
if (::tcgetattr(m_fd, &fd_termios) == 0)
{
bool set_corectly = false;
if (enabled)
{
if (fd_termios.c_lflag & ECHO)
set_corectly = true;
else
fd_termios.c_lflag |= ECHO;
}
else
{
if (fd_termios.c_lflag & ECHO)
fd_termios.c_lflag &= ~ECHO;
else
set_corectly = true;
}
if (set_corectly)
return true;
return ::tcsetattr (m_fd, TCSANOW, &fd_termios) == 0;
}
}
#endif // #ifdef LLDB_CONFIG_TERMIOS_SUPPORTED
}
return false;
}
bool
Terminal::SetCanonical (bool enabled)
{
if (FileDescriptorIsValid())
{
#ifdef LLDB_CONFIG_TERMIOS_SUPPORTED
if (IsATerminal ())
{
struct termios fd_termios;
if (::tcgetattr(m_fd, &fd_termios) == 0)
{
bool set_corectly = false;
if (enabled)
{
if (fd_termios.c_lflag & ICANON)
set_corectly = true;
else
fd_termios.c_lflag |= ICANON;
}
else
{
if (fd_termios.c_lflag & ICANON)
fd_termios.c_lflag &= ~ICANON;
else
set_corectly = true;
}
if (set_corectly)
return true;
return ::tcsetattr (m_fd, TCSANOW, &fd_termios) == 0;
}
}
#endif // #ifdef LLDB_CONFIG_TERMIOS_SUPPORTED
}
return false;
}
TerminalState::TerminalState() :
m_tty(),
m_tflags(-1),
m_termios_ap(),
m_process_group(-1)
{
}
TerminalState::~TerminalState()
{
}
void
TerminalState::Clear ()
{
m_tty.Clear();
m_tflags = -1;
m_termios_ap.reset();
m_process_group = -1;
}
bool
TerminalState::Save (int fd, bool save_process_group)
{
m_tty.SetFileDescriptor(fd);
if (m_tty.IsATerminal())
{
m_tflags = ::fcntl (fd, F_GETFL, 0);
#ifdef LLDB_CONFIG_TERMIOS_SUPPORTED
if (m_termios_ap.get() == NULL)
m_termios_ap.reset (new struct termios);
int err = ::tcgetattr (fd, m_termios_ap.get());
if (err != 0)
m_termios_ap.reset();
#endif // #ifdef LLDB_CONFIG_TERMIOS_SUPPORTED
if (save_process_group)
m_process_group = ::tcgetpgrp (0);
else
m_process_group = -1;
}
else
{
m_tty.Clear();
m_tflags = -1;
m_termios_ap.reset();
m_process_group = -1;
}
return IsValid();
}
bool
TerminalState::Restore () const
{
if (IsValid())
{
const int fd = m_tty.GetFileDescriptor();
if (TFlagsIsValid())
fcntl (fd, F_SETFL, m_tflags);
#ifdef LLDB_CONFIG_TERMIOS_SUPPORTED
if (TTYStateIsValid())
tcsetattr (fd, TCSANOW, m_termios_ap.get());
#endif // #ifdef LLDB_CONFIG_TERMIOS_SUPPORTED
if (ProcessGroupIsValid())
{
void (*saved_sigttou_callback) (int) = NULL;
saved_sigttou_callback = (void (*)(int)) signal (SIGTTOU, SIG_IGN);
tcsetpgrp (fd, m_process_group);
signal (SIGTTOU, saved_sigttou_callback);
}
return true;
}
return false;
}
bool
TerminalState::IsValid() const
{
return m_tty.FileDescriptorIsValid () && (TFlagsIsValid() || TTYStateIsValid());
}
bool
TerminalState::TFlagsIsValid() const
{
return m_tflags != -1;
}
bool
TerminalState::TTYStateIsValid() const
{
return m_termios_ap.get() != 0;
}
bool
TerminalState::ProcessGroupIsValid() const
{
return m_process_group != -1;
}
TerminalStateSwitcher::TerminalStateSwitcher () :
m_currentState(UINT32_MAX)
{
}
TerminalStateSwitcher::~TerminalStateSwitcher ()
{
}
uint32_t
TerminalStateSwitcher::GetNumberOfStates() const
{
return sizeof(m_ttystates)/sizeof(TerminalState);
}
bool
TerminalStateSwitcher::Restore (uint32_t idx) const
{
const uint32_t num_states = GetNumberOfStates();
if (idx >= num_states)
return false;
if (m_currentState < num_states && (idx == m_currentState) && m_ttystates[idx].IsValid())
return true;
if (m_ttystates[idx].Restore())
{
m_currentState = idx;
return true;
}
return false;
}
bool
TerminalStateSwitcher::Save (uint32_t idx, int fd, bool save_process_group)
{
const uint32_t num_states = GetNumberOfStates();
if (idx < num_states)
return m_ttystates[idx].Save(fd, save_process_group);
return false;
}