mirror of
https://github.com/RGBCube/serenity
synced 2025-07-24 14:17:42 +00:00
Kernel+LibC: Support more termios
settings in TTY
This commit adds support for the various ECHO* lflags and fixes some POSIX conformance issues around newline handling. Also included are error messages when setting not implemented settings.
This commit is contained in:
parent
b1b0db946e
commit
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3 changed files with 116 additions and 36 deletions
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@ -5,6 +5,7 @@
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*/
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*/
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#include <AK/ScopeGuard.h>
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#include <AK/ScopeGuard.h>
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#include <AK/StringView.h>
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#include <Kernel/Debug.h>
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#include <Kernel/Debug.h>
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#include <Kernel/Process.h>
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#include <Kernel/Process.h>
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#include <Kernel/TTY/TTY.h>
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#include <Kernel/TTY/TTY.h>
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@ -50,16 +51,12 @@ KResultOr<size_t> TTY::read(FileDescription&, u64, UserOrKernelBuffer& buffer, s
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if (m_input_buffer.size() < static_cast<size_t>(size))
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if (m_input_buffer.size() < static_cast<size_t>(size))
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size = m_input_buffer.size();
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size = m_input_buffer.size();
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KResultOr<size_t> result = 0;
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bool need_evaluate_block_conditions = false;
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bool need_evaluate_block_conditions = false;
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if (in_canonical_mode()) {
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auto result = buffer.write_buffered<512>(size, [&](u8* data, size_t data_size) {
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result = buffer.write_buffered<512>(size, [&](u8* data, size_t data_size) {
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for (size_t i = 0; i < data_size; ++i) {
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size_t i = 0;
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u8 ch = m_input_buffer.dequeue();
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for (; i < data_size; i++) {
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if (in_canonical_mode()) {
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u8 ch = m_input_buffer.dequeue();
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if (ch == '\0') {
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if (ch == '\0') {
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//Here we handle a ^D line, so we don't add the
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//character to the output.
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m_available_lines--;
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m_available_lines--;
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need_evaluate_block_conditions = true;
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need_evaluate_block_conditions = true;
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break;
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break;
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@ -69,23 +66,11 @@ KResultOr<size_t> TTY::read(FileDescription&, u64, UserOrKernelBuffer& buffer, s
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m_available_lines--;
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m_available_lines--;
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break;
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break;
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}
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}
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data[i] = ch;
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}
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}
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return i;
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data[i] = ch;
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});
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}
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} else {
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return data_size;
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result = buffer.write_buffered<512>(size, [&](u8* data, size_t data_size) {
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});
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for (size_t i = 0; i < data_size; i++) {
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auto ch = m_input_buffer.dequeue();
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if (ch == '\r' && m_termios.c_iflag & ICRNL)
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ch = '\n';
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else if (ch == '\n' && m_termios.c_iflag & INLCR)
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ch = '\r';
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data[i] = ch;
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}
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return data_size;
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});
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}
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if ((!result.is_error() && result.value() > 0) || need_evaluate_block_conditions)
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if ((!result.is_error() && result.value() > 0) || need_evaluate_block_conditions)
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evaluate_block_conditions();
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evaluate_block_conditions();
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return result;
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return result;
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@ -104,9 +89,11 @@ KResultOr<size_t> TTY::write(FileDescription&, u64, const UserOrKernelBuffer& bu
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size_t extra_chars = 0;
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size_t extra_chars = 0;
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for (size_t i = 0; i < buffer_bytes; ++i) {
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for (size_t i = 0; i < buffer_bytes; ++i) {
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auto ch = data[i];
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auto ch = data[i];
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if (ch == '\n' && (m_termios.c_oflag & (OPOST | ONLCR))) {
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if (m_termios.c_oflag & OPOST) {
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modified_data[i + extra_chars] = '\r';
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if (ch == '\n' && (m_termios.c_oflag & ONLCR)) {
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extra_chars++;
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modified_data[i + extra_chars] = '\r';
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extra_chars++;
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}
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}
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}
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modified_data[i + extra_chars] = ch;
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modified_data[i + extra_chars] = ch;
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}
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}
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@ -155,6 +142,9 @@ bool TTY::is_werase(u8 ch) const
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void TTY::emit(u8 ch, bool do_evaluate_block_conditions)
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void TTY::emit(u8 ch, bool do_evaluate_block_conditions)
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{
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{
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if (m_termios.c_iflag & ISTRIP)
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ch &= 0x7F;
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if (should_generate_signals()) {
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if (should_generate_signals()) {
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if (ch == m_termios.c_cc[VINFO]) {
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if (ch == m_termios.c_cc[VINFO]) {
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dbgln("{}: VINFO pressed!", tty_name());
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dbgln("{}: VINFO pressed!", tty_name());
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@ -187,6 +177,11 @@ void TTY::emit(u8 ch, bool do_evaluate_block_conditions)
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evaluate_block_conditions();
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evaluate_block_conditions();
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});
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});
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if (ch == '\r' && (m_termios.c_iflag & ICRNL))
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ch = '\n';
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else if (ch == '\n' && (m_termios.c_iflag & INLCR))
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ch = '\r';
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if (in_canonical_mode()) {
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if (in_canonical_mode()) {
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if (is_eof(ch)) {
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if (is_eof(ch)) {
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m_available_lines++;
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m_available_lines++;
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@ -195,11 +190,11 @@ void TTY::emit(u8 ch, bool do_evaluate_block_conditions)
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m_input_buffer.enqueue('\0');
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m_input_buffer.enqueue('\0');
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return;
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return;
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}
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}
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if (is_kill(ch)) {
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if (is_kill(ch) && m_termios.c_lflag & ECHOK) {
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kill_line();
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kill_line();
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return;
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return;
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}
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}
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if (is_erase(ch)) {
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if (is_erase(ch) && m_termios.c_lflag & ECHOE) {
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do_backspace();
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do_backspace();
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return;
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return;
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}
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}
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@ -207,12 +202,23 @@ void TTY::emit(u8 ch, bool do_evaluate_block_conditions)
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erase_word();
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erase_word();
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return;
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return;
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}
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}
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if (ch == '\n' || is_eol(ch)) {
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if (is_eol(ch)) {
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m_available_lines++;
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m_available_lines++;
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}
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}
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if (ch == '\n') {
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if (m_termios.c_lflag & ECHO || m_termios.c_lflag & ECHONL)
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echo('\n');
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m_input_buffer.enqueue('\n');
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m_available_lines++;
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return;
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}
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}
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}
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m_input_buffer.enqueue(ch);
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m_input_buffer.enqueue(ch);
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echo(ch);
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if (m_termios.c_lflag & ECHO)
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echo(ch);
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}
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}
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bool TTY::can_do_backspace() const
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bool TTY::can_do_backspace() const
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@ -303,8 +309,9 @@ void TTY::flush_input()
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evaluate_block_conditions();
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evaluate_block_conditions();
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}
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}
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void TTY::set_termios(const termios& t)
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int TTY::set_termios(const termios& t)
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{
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{
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int rc = 0;
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m_termios = t;
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m_termios = t;
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dbgln_if(TTY_DEBUG, "{} set_termios: ECHO={}, ISIG={}, ICANON={}, ECHOE={}, ECHOK={}, ECHONL={}, ISTRIP={}, ICRNL={}, INLCR={}, IGNCR={}, OPOST={}, ONLCR={}",
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dbgln_if(TTY_DEBUG, "{} set_termios: ECHO={}, ISIG={}, ICANON={}, ECHOE={}, ECHOK={}, ECHONL={}, ISTRIP={}, ICRNL={}, INLCR={}, IGNCR={}, OPOST={}, ONLCR={}",
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@ -321,6 +328,79 @@ void TTY::set_termios(const termios& t)
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((m_termios.c_iflag & IGNCR) != 0),
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((m_termios.c_iflag & IGNCR) != 0),
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((m_termios.c_oflag & OPOST) != 0),
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((m_termios.c_oflag & OPOST) != 0),
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((m_termios.c_oflag & ONLCR) != 0));
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((m_termios.c_oflag & ONLCR) != 0));
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struct FlagDescription {
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tcflag_t value;
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StringView name;
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};
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static constexpr FlagDescription unimplemented_iflags[] = {
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{ IGNBRK, "IGNBRK" },
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{ BRKINT, "BRKINT" },
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{ IGNPAR, "IGNPAR" },
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{ PARMRK, "PARMRK" },
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{ INPCK, "INPCK" },
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{ IGNCR, "IGNCR" },
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{ IUCLC, "IUCLC" },
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{ IXON, "IXON" },
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{ IXANY, "IXANY" },
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{ IXOFF, "IXOFF" },
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{ IMAXBEL, "IMAXBEL" },
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{ IUTF8, "IUTF8" }
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};
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for (auto flag : unimplemented_iflags) {
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if (m_termios.c_iflag & flag.value) {
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dbgln("FIXME: iflag {} unimplemented", flag.name);
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rc = -ENOTIMPL;
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}
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}
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static constexpr FlagDescription unimplemented_oflags[] = {
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{ OLCUC, "OLCUC" },
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{ ONOCR, "ONOCR" },
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{ ONLRET, "ONLRET" },
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{ OFILL, "OFILL" },
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{ OFDEL, "OFDEL" }
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};
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for (auto flag : unimplemented_oflags) {
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if (m_termios.c_oflag & flag.value) {
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dbgln("FIXME: oflag {} unimplemented", flag.name);
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rc = -ENOTIMPL;
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}
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}
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static constexpr FlagDescription unimplemented_cflags[] = {
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{ CSIZE, "CSIZE" },
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{ CS5, "CS5" },
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{ CS6, "CS6" },
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{ CS7, "CS7" },
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{ CS8, "CS8" },
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{ CSTOPB, "CSTOPB" },
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{ CREAD, "CREAD" },
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{ PARENB, "PARENB" },
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{ PARODD, "PARODD" },
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{ HUPCL, "HUPCL" },
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{ CLOCAL, "CLOCAL" }
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};
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for (auto flag : unimplemented_cflags) {
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if (m_termios.c_cflag & flag.value) {
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dbgln("FIXME: cflag {} unimplemented", flag.name);
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rc = -ENOTIMPL;
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}
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}
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static constexpr FlagDescription unimplemented_lflags[] = {
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{ TOSTOP, "TOSTOP" },
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{ IEXTEN, "IEXTEN" }
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};
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for (auto flag : unimplemented_lflags) {
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if (m_termios.c_lflag & flag.value) {
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dbgln("FIXME: lflag {} unimplemented", flag.name);
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rc = -ENOTIMPL;
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}
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}
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return rc;
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}
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}
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int TTY::ioctl(FileDescription&, unsigned request, FlatPtr arg)
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int TTY::ioctl(FileDescription&, unsigned request, FlatPtr arg)
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@ -381,10 +461,10 @@ int TTY::ioctl(FileDescription&, unsigned request, FlatPtr arg)
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termios termios;
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termios termios;
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if (!copy_from_user(&termios, user_termios))
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if (!copy_from_user(&termios, user_termios))
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return -EFAULT;
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return -EFAULT;
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set_termios(termios);
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int rc = set_termios(termios);
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if (request == TCSETSF)
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if (request == TCSETSF)
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flush_input();
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flush_input();
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return 0;
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return rc;
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}
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}
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case TCFLSH:
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case TCFLSH:
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// Serenity's TTY implementation does not use an output buffer, so ignore TCOFLUSH.
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// Serenity's TTY implementation does not use an output buffer, so ignore TCOFLUSH.
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return 0;
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return 0;
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}
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}
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void set_termios(const termios&);
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int set_termios(const termios&);
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bool should_generate_signals() const { return m_termios.c_lflag & ISIG; }
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bool should_generate_signals() const { return m_termios.c_lflag & ISIG; }
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bool should_flush_on_signal() const { return !(m_termios.c_lflag & NOFLSH); }
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bool should_flush_on_signal() const { return !(m_termios.c_lflag & NOFLSH); }
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bool should_echo_input() const { return m_termios.c_lflag & ECHO; }
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bool should_echo_input() const { return m_termios.c_lflag & ECHO; }
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@ -6,7 +6,7 @@
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#pragma once
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#pragma once
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#define TTYDEF_IFLAG (ICRNL | IXON | IXANY)
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#define TTYDEF_IFLAG (ICRNL)
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#define TTYDEF_OFLAG (OPOST | ONLCR)
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#define TTYDEF_OFLAG (OPOST | ONLCR)
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#define TTYDEF_LFLAG_NOECHO (ISIG | ICANON)
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#define TTYDEF_LFLAG_NOECHO (ISIG | ICANON)
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#define TTYDEF_LFLAG_ECHO (TTYDEF_LFLAG_NOECHO | ECHO | ECHOE | ECHOK | ECHONL)
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#define TTYDEF_LFLAG_ECHO (TTYDEF_LFLAG_NOECHO | ECHO | ECHOE | ECHOK | ECHONL)
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