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[/] [or1k/] [trunk/] [mw/] [src/] [drivers/] [kbd_tty.c] - Blame information for rev 1772

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

Line No.	Rev	Author	Line
1	673	markom	`/*`
2			`* Copyright (c) 1999 Greg Haerr <greg@censoft.com>`
3			`* Copyright (c) 1991 David I. Bell`
4			`* Permission is granted to use, distribute, or modify this source,`
5			`* provided that this copyright notice remains intact.`
6			`*`
7			`* /dev/tty TTY Keyboard Driver`
8			`*/`
9			`#include <stdlib.h>`
10			`#include <sys/types.h>`
11			`#include <fcntl.h>`
12			`#include <unistd.h>`
13			`#include <errno.h>`
14			`#include <termios.h>`
15			`#include "device.h"`
16
17			`#if ELKS`
18			`#define KEYBOARD "/dev/tty1" /* keyboard associated with screen*/`
19			`#else`
20			`#define KEYBOARD "/dev/tty" /* keyboard associated with screen*/`
21			`#endif`
22
23			`extern int escape_quits;`
24
25			`static int TTY_Open(KBDDEVICE *pkd);`
26			`static void TTY_Close(void);`
27			`static void TTY_GetModifierInfo(MWKEYMOD modifiers, MWKEYMOD curmodifiers);`
28			`static int TTY_Read(MWKEY kbuf, MWKEYMOD modifiers, MWSCANCODE *scancode);`
29			`static int TTY_Poll(void);`
30
31			`KBDDEVICE kbddev = {`
32			`TTY_Open,`
33			`TTY_Close,`
34			`TTY_GetModifierInfo,`
35			`TTY_Read,`
36			`#if _MINIX`
37			`TTY_Poll`
38			`#else`
39			`NULL`
40			`#endif`
41			`};`
42
43			`static int fd; /* file descriptor for keyboard */`
44			`static struct termios old; /* original terminal modes */`
45
46			`/*`
47			`* Open the keyboard.`
48			`* This is real simple, we just use a special file handle`
49			`* that allows non-blocking I/O, and put the terminal into`
50			`* character mode.`
51			`*/`
52			`static int`
53			`TTY_Open(KBDDEVICE *pkd)`
54			`{`
55			`char *env;`
56
57			`int i;`
58			`int ledstate = 0;`
59			`struct termios new;`
60
61			`/* Open "CONSOLE" or /dev/tty device*/`
62			`if(!(env = getenv("CONSOLE")))`
63			`fd = open(KEYBOARD, O_NONBLOCK);`
64			`else`
65			`fd = open(env, O_NONBLOCK);`
66			`if (fd < 0)`
67			`return -1;`
68
69			`if (tcgetattr(fd, &old) < 0)`
70			`goto err;`
71
72			`new = old;`
73			`/* If you uncomment ISIG and BRKINT below, then ^C will be ignored.*/`
74			`new.c_lflag &= ~(ECHO \| ICANON \| IEXTEN /\| ISIG/);`
75			`new.c_iflag &= ~(ICRNL \| INPCK \| ISTRIP \| IXON /\| BRKINT/);`
76			`new.c_cflag &= ~(CSIZE \| PARENB);`
77			`new.c_cflag \|= CS8;`
78			`new.c_cc[VMIN] = 0;`
79			`new.c_cc[VTIME] = 0;`
80
81			`if(tcsetattr(fd, TCSAFLUSH, &new) < 0)`
82			`goto err;`
83			`return fd;`
84
85			`err:`
86			`close(fd);`
87			`fd = 0;`
88			`return -1;`
89			`}`
90
91			`/*`
92			`* Close the keyboard.`
93			`* This resets the terminal modes.`
94			`*/`
95			`static void`
96			`TTY_Close(void)`
97			`{`
98			`tcsetattr(fd, TCSANOW, &old);`
99			`close(fd);`
100			`fd = 0;`
101			`}`
102
103			`/*`
104			`* Return the possible modifiers for the keyboard.`
105			`*/`
106			`static void`
107			`TTY_GetModifierInfo(MWKEYMOD modifiers, MWKEYMOD curmodifiers)`
108			`{`
109			`if (modifiers)`
110			`modifiers = 0; / no modifiers available */`
111			`if (curmodifiers)`
112			`*curmodifiers = 0;`
113			`}`
114
115			`/*`
116			`* This reads one keystroke from the keyboard, and the current state of`
117			`* the modifier keys (ALT, SHIFT, etc). Returns -1 on error, 0 if no data`
118			`* is ready, 1 on a keypress, and 2 on keyrelease.`
119			`* This is a non-blocking call.`
120			`*/`
121			`static int`
122			`TTY_Read(MWKEY kbuf, MWKEYMOD modifiers, MWSCANCODE *scancode)`
123			`{`
124			`int cc; /* characters read */`
125			`MWKEY mwkey;`
126			`unsigned char buf[1];`
127
128			`cc = read(fd, buf, 1);`
129			`if (cc > 0) {`
130			`mwkey = buf[0];`
131			`if (mwkey == 27 && escape_quits) /* ESC -> quit*/`
132			`mwkey = MWKEY_QUIT;`
133			`else if (mwkey == ('P'&0x1f)) /* ^P -> print*/`
134			`mwkey = MWKEY_PRINT;`
135
136			`kbuf = mwkey; / no translation*/`
137			`modifiers = 0; / no modifiers*/`
138			`scancode = 0; / no scancode*/`
139			`return 1; /* keypress*/`
140			`}`
141			`if ((cc < 0) && (errno != EINTR) && (errno != EAGAIN)) {`
142			`return -1;`
143			`}`
144			`return 0;`
145			`}`
146
147			`static int`
148			`TTY_Poll(void)`
149			`{`
150			`return 1; /* used by _MINIX only*/`
151			`}`

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[/] [or1k/] [trunk/] [mw/] [src/] [drivers/] [kbd_tty.c] - Blame information for rev 1772