100 lines
2.7 KiB
C
100 lines
2.7 KiB
C
/*
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* 'tty.h' defines some structures used by tty_io.c and some defines.
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*
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* NOTE! Don't touch this without checking that nothing in rs_io.s or
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* con_io.s breaks. Some constants are hardwired into the system (mainly
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* offsets into 'tty_queue'
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*/
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#ifndef _TTY_H
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#define _TTY_H
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#define MAX_CONSOLES 8
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#define NR_SERIALS 2
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#define NR_PTYS 4
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extern int NR_CONSOLES;
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#include <termios.h>
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#define TTY_BUF_SIZE 1024
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struct tty_queue {
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unsigned long data;
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unsigned long head;
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unsigned long tail;
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struct task_struct * proc_list;
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char buf[TTY_BUF_SIZE];
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};
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#define IS_A_CONSOLE(min) (((min) & 0xC0) == 0x00)
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#define IS_A_SERIAL(min) (((min) & 0xC0) == 0x40)
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#define IS_A_PTY(min) ((min) & 0x80)
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#define IS_A_PTY_MASTER(min) (((min) & 0xC0) == 0x80)
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#define IS_A_PTY_SLAVE(min) (((min) & 0xC0) == 0xC0)
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#define PTY_OTHER(min) ((min) ^ 0x40)
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#define INC(a) ((a) = ((a)+1) & (TTY_BUF_SIZE-1))
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#define DEC(a) ((a) = ((a)-1) & (TTY_BUF_SIZE-1))
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#define EMPTY(a) ((a)->head == (a)->tail)
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#define LEFT(a) (((a)->tail-(a)->head-1)&(TTY_BUF_SIZE-1))
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#define LAST(a) ((a)->buf[(TTY_BUF_SIZE-1)&((a)->head-1)])
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#define FULL(a) (!LEFT(a))
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#define CHARS(a) (((a)->head-(a)->tail)&(TTY_BUF_SIZE-1))
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#define GETCH(queue,c) \
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(void)({c=(queue)->buf[(queue)->tail];INC((queue)->tail);})
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#define PUTCH(c,queue) \
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(void)({(queue)->buf[(queue)->head]=(c);INC((queue)->head);})
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#define INTR_CHAR(tty) ((tty)->termios.c_cc[VINTR])
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#define QUIT_CHAR(tty) ((tty)->termios.c_cc[VQUIT])
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#define ERASE_CHAR(tty) ((tty)->termios.c_cc[VERASE])
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#define KILL_CHAR(tty) ((tty)->termios.c_cc[VKILL])
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#define EOF_CHAR(tty) ((tty)->termios.c_cc[VEOF])
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#define START_CHAR(tty) ((tty)->termios.c_cc[VSTART])
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#define STOP_CHAR(tty) ((tty)->termios.c_cc[VSTOP])
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#define SUSPEND_CHAR(tty) ((tty)->termios.c_cc[VSUSP])
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struct tty_struct {
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struct termios termios;
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int pgrp;
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int session;
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int stopped;
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void (*write)(struct tty_struct * tty);
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struct tty_queue *read_q;
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struct tty_queue *write_q;
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struct tty_queue *secondary;
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};
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extern struct tty_struct tty_table[];
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extern int fg_console;
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#define TTY_TABLE(nr) \
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(tty_table + ((nr) ? (((nr) < 64)? (nr)-1:(nr)) : fg_console))
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/* intr=^C quit=^| erase=del kill=^U
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eof=^D vtime=\0 vmin=\1 sxtc=\0
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start=^Q stop=^S susp=^Z eol=\0
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reprint=^R discard=^U werase=^W lnext=^V
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eol2=\0
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*/
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#define INIT_C_CC "\003\034\177\025\004\0\1\0\021\023\032\0\022\017\027\026\0"
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void rs_init(void);
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void con_init(void);
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void tty_init(void);
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int tty_read(unsigned c, char * buf, int n);
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int tty_write(unsigned c, char * buf, int n);
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void con_write(struct tty_struct * tty);
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void rs_write(struct tty_struct * tty);
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void mpty_write(struct tty_struct * tty);
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void spty_write(struct tty_struct * tty);
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void copy_to_cooked(struct tty_struct * tty);
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void update_screen(void);
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#endif
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