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LibC+Kernel: Add sys/ttydefaults.h

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This non-POSIX header is used in Linux/BSD systems for storing the
default termios settings. This lets us setup new TTYs' `m_termios.c_cc`
in a nicer way than using a magic string.
This commit is contained in:
Daniel Bertalan 2021-05-16 15:27:09 +02:00 • committed by Andreas Kling
parent 7ec8cb97e9
commit d5ea04cdfb
2 changed files with 80 additions and 3 deletions
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13
Kernel/TTY/TTY.cpp
View file

@ -11,6 +11,9 @@
#include <LibC/errno_numbers.h>
#include <LibC/signal_numbers.h>
#include <LibC/sys/ioctl_numbers.h>
#define TTYDEFCHARS
#include <LibC/sys/ttydefaults.h>
#undef TTYDEFCHARS
namespace Kernel {
@ -27,9 +30,13 @@ TTY::~TTY()
void TTY::set_default_termios()
{
memset(&m_termios, 0, sizeof(m_termios));
m_termios.c_lflag |= ISIG | ECHO | ICANON;
static const char default_cc[32] = "\003\034\010\025\004\0\1\0\021\023\032\0\022\017\027\026\0\024";
memcpy(m_termios.c_cc, default_cc, sizeof(default_cc));
m_termios.c_iflag = TTYDEF_IFLAG;
m_termios.c_oflag = TTYDEF_OFLAG;
m_termios.c_cflag = TTYDEF_CFLAG;
m_termios.c_lflag = TTYDEF_LFLAG;
m_termios.c_ispeed = TTYDEF_SPEED;
m_termios.c_ospeed = TTYDEF_SPEED;
memcpy(m_termios.c_cc, ttydefchars, sizeof(ttydefchars));
}
KResultOr<size_t> TTY::read(FileDescription&, u64, UserOrKernelBuffer& buffer, size_t size)

70
Userland/Libraries/LibC/sys/ttydefaults.h Normal file
View file

@ -0,0 +1,70 @@
/*
* Copyright (c) 2021, Daniel Bertalan <dani@danielbertalan.dev>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#define TTYDEF_IFLAG (ICRNL | IXON | IXANY)
#define TTYDEF_OFLAG (OPOST | ONLCR)
#define TTYDEF_LFLAG_NOECHO (ISIG | ICANON)
#define TTYDEF_LFLAG_ECHO (TTYDEF_LFLAG_NOECHO | ECHO | ECHOE | ECHOK | ECHONL)
#define TTYDEF_LFLAG TTYDEF_LFLAG_ECHO
#define TTYDEF_CFLAG (0)
#define TTYDEF_SPEED (B9600)
#define CTRL(c) (c & 0x1F)
#define CINTR CTRL('c')
#define CQUIT 034
#define CERASE 0177
#define CKILL CTRL('u')
#define CEOF CTRL('d')
#define CTIME 0
#define CMIN 1
#define CSWTC 0
#define CSTART CTRL('q')
#define CSTOP CTRL('s')
#define CSUSP CTRL('z')
#define CEOL 0
#define CREPRINT CTRL('r')
#define CDISCARD CTRL('o')
#define CWERASE CTRL('w')
#define CLNEXT CTRL('v')
#define CEOL2 CEOL
#define CEOT CEOF
#define CBRK CEOL
#define CRPRNT CREPRINT
#define CFLUSH CDISCARD
#ifdef TTYDEFCHARS
# ifdef KERNEL
# include <Kernel/UnixTypes.h>
# else
# include <termios.h>
# endif
# include <sys/cdefs.h>
__BEGIN_DECLS
static const cc_t ttydefchars[NCCS] = {
[VINTR] = CINTR,
[VQUIT] = CQUIT,
[VERASE] = CERASE,
[VKILL] = CKILL,
[VEOF] = CEOF,
[VTIME] = CTIME,
[VMIN] = CMIN,
[VSWTC] = CSWTC,
[VSTART] = CSTART,
[VSTOP] = CSTOP,
[VSUSP] = CSUSP,
[VEOL] = CEOL,
[VREPRINT] = CREPRINT,
[VDISCARD] = CDISCARD,
[VWERASE] = CWERASE,
[VLNEXT] = CLNEXT,
[VEOL2] = CEOL2
};
__END_DECLS
#endif