/*
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/*
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* Copyright (c) 1999 Greg Haerr <greg@censoft.com>
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* Copyright (c) 1999 Greg Haerr <greg@censoft.com>
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* Copyright (c) 1991 David I. Bell
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* Copyright (c) 1991 David I. Bell
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* Permission is granted to use, distribute, or modify this source,
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* Permission is granted to use, distribute, or modify this source,
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* provided that this copyright notice remains intact.
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* provided that this copyright notice remains intact.
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*
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*
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* /dev/tty TTY Keyboard Driver
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* /dev/tty TTY Keyboard Driver
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*/
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*/
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#include <stdlib.h>
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#include <stdlib.h>
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#include <sys/types.h>
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#include <sys/types.h>
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#include <fcntl.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <unistd.h>
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#include <errno.h>
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#include <errno.h>
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#include <termios.h>
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#include <termios.h>
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#include "device.h"
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#include "device.h"
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#if ELKS
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#if ELKS
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#define KEYBOARD "/dev/tty1" /* keyboard associated with screen*/
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#define KEYBOARD "/dev/tty1" /* keyboard associated with screen*/
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#else
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#else
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#define KEYBOARD "/dev/tty" /* keyboard associated with screen*/
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#define KEYBOARD "/dev/tty" /* keyboard associated with screen*/
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#endif
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#endif
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extern int escape_quits;
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extern int escape_quits;
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static int TTY_Open(KBDDEVICE *pkd);
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static int TTY_Open(KBDDEVICE *pkd);
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static void TTY_Close(void);
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static void TTY_Close(void);
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static void TTY_GetModifierInfo(MWKEYMOD *modifiers, MWKEYMOD *curmodifiers);
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static void TTY_GetModifierInfo(MWKEYMOD *modifiers, MWKEYMOD *curmodifiers);
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static int TTY_Read(MWKEY *kbuf, MWKEYMOD *modifiers, MWSCANCODE *scancode);
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static int TTY_Read(MWKEY *kbuf, MWKEYMOD *modifiers, MWSCANCODE *scancode);
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static int TTY_Poll(void);
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static int TTY_Poll(void);
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KBDDEVICE kbddev = {
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KBDDEVICE kbddev = {
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TTY_Open,
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TTY_Open,
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TTY_Close,
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TTY_Close,
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TTY_GetModifierInfo,
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TTY_GetModifierInfo,
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TTY_Read,
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TTY_Read,
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#if _MINIX
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#if _MINIX
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TTY_Poll
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TTY_Poll
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#else
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#else
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NULL
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NULL
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#endif
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#endif
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};
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};
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static int fd; /* file descriptor for keyboard */
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static int fd; /* file descriptor for keyboard */
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static struct termios old; /* original terminal modes */
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static struct termios old; /* original terminal modes */
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/*
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/*
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* Open the keyboard.
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* Open the keyboard.
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* This is real simple, we just use a special file handle
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* This is real simple, we just use a special file handle
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* that allows non-blocking I/O, and put the terminal into
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* that allows non-blocking I/O, and put the terminal into
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* character mode.
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* character mode.
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*/
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*/
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static int
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static int
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TTY_Open(KBDDEVICE *pkd)
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TTY_Open(KBDDEVICE *pkd)
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{
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{
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char *env;
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char *env;
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int i;
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int i;
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int ledstate = 0;
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int ledstate = 0;
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struct termios new;
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struct termios new;
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/* Open "CONSOLE" or /dev/tty device*/
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/* Open "CONSOLE" or /dev/tty device*/
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if(!(env = getenv("CONSOLE")))
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if(!(env = getenv("CONSOLE")))
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fd = open(KEYBOARD, O_NONBLOCK);
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fd = open(KEYBOARD, O_NONBLOCK);
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else
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else
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fd = open(env, O_NONBLOCK);
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fd = open(env, O_NONBLOCK);
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if (fd < 0)
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if (fd < 0)
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return -1;
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return -1;
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if (tcgetattr(fd, &old) < 0)
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if (tcgetattr(fd, &old) < 0)
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goto err;
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goto err;
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new = old;
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new = old;
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/* If you uncomment ISIG and BRKINT below, then ^C will be ignored.*/
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/* If you uncomment ISIG and BRKINT below, then ^C will be ignored.*/
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new.c_lflag &= ~(ECHO | ICANON | IEXTEN /*| ISIG*/);
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new.c_lflag &= ~(ECHO | ICANON | IEXTEN /*| ISIG*/);
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new.c_iflag &= ~(ICRNL | INPCK | ISTRIP | IXON /*| BRKINT*/);
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new.c_iflag &= ~(ICRNL | INPCK | ISTRIP | IXON /*| BRKINT*/);
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new.c_cflag &= ~(CSIZE | PARENB);
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new.c_cflag &= ~(CSIZE | PARENB);
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new.c_cflag |= CS8;
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new.c_cflag |= CS8;
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new.c_cc[VMIN] = 0;
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new.c_cc[VMIN] = 0;
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new.c_cc[VTIME] = 0;
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new.c_cc[VTIME] = 0;
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if(tcsetattr(fd, TCSAFLUSH, &new) < 0)
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if(tcsetattr(fd, TCSAFLUSH, &new) < 0)
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goto err;
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goto err;
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return fd;
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return fd;
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err:
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err:
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close(fd);
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close(fd);
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fd = 0;
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fd = 0;
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return -1;
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return -1;
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}
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}
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/*
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/*
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* Close the keyboard.
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* Close the keyboard.
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* This resets the terminal modes.
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* This resets the terminal modes.
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*/
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*/
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static void
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static void
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TTY_Close(void)
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TTY_Close(void)
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{
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{
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tcsetattr(fd, TCSANOW, &old);
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tcsetattr(fd, TCSANOW, &old);
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close(fd);
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close(fd);
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fd = 0;
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fd = 0;
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}
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}
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/*
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/*
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* Return the possible modifiers for the keyboard.
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* Return the possible modifiers for the keyboard.
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*/
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*/
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static void
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static void
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TTY_GetModifierInfo(MWKEYMOD *modifiers, MWKEYMOD *curmodifiers)
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TTY_GetModifierInfo(MWKEYMOD *modifiers, MWKEYMOD *curmodifiers)
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{
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{
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if (modifiers)
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if (modifiers)
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*modifiers = 0; /* no modifiers available */
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*modifiers = 0; /* no modifiers available */
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if (curmodifiers)
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if (curmodifiers)
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*curmodifiers = 0;
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*curmodifiers = 0;
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}
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}
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/*
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/*
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* This reads one keystroke from the keyboard, and the current state of
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* This reads one keystroke from the keyboard, and the current state of
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* the modifier keys (ALT, SHIFT, etc). Returns -1 on error, 0 if no data
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* the modifier keys (ALT, SHIFT, etc). Returns -1 on error, 0 if no data
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* is ready, 1 on a keypress, and 2 on keyrelease.
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* is ready, 1 on a keypress, and 2 on keyrelease.
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* This is a non-blocking call.
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* This is a non-blocking call.
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*/
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*/
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static int
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static int
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TTY_Read(MWKEY *kbuf, MWKEYMOD *modifiers, MWSCANCODE *scancode)
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TTY_Read(MWKEY *kbuf, MWKEYMOD *modifiers, MWSCANCODE *scancode)
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{
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{
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int cc; /* characters read */
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int cc; /* characters read */
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MWKEY mwkey;
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MWKEY mwkey;
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unsigned char buf[1];
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unsigned char buf[1];
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cc = read(fd, buf, 1);
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cc = read(fd, buf, 1);
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if (cc > 0) {
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if (cc > 0) {
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mwkey = buf[0];
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mwkey = buf[0];
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if (mwkey == 27 && escape_quits) /* ESC -> quit*/
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if (mwkey == 27 && escape_quits) /* ESC -> quit*/
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mwkey = MWKEY_QUIT;
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mwkey = MWKEY_QUIT;
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else if (mwkey == ('P'&0x1f)) /* ^P -> print*/
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else if (mwkey == ('P'&0x1f)) /* ^P -> print*/
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mwkey = MWKEY_PRINT;
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mwkey = MWKEY_PRINT;
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*kbuf = mwkey; /* no translation*/
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*kbuf = mwkey; /* no translation*/
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*modifiers = 0; /* no modifiers*/
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*modifiers = 0; /* no modifiers*/
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*scancode = 0; /* no scancode*/
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*scancode = 0; /* no scancode*/
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return 1; /* keypress*/
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return 1; /* keypress*/
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}
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}
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if ((cc < 0) && (errno != EINTR) && (errno != EAGAIN)) {
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if ((cc < 0) && (errno != EINTR) && (errno != EAGAIN)) {
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return -1;
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return -1;
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}
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}
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return 0;
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return 0;
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}
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}
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static int
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static int
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TTY_Poll(void)
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TTY_Poll(void)
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{
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{
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return 1; /* used by _MINIX only*/
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return 1; /* used by _MINIX only*/
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}
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}
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