1 /*- 2 * Copyright (c) 1982, 1986, 1993 3 * The Regents of the University of California. All rights reserved. 4 * (c) UNIX System Laboratories, Inc. 5 * All or some portions of this file are derived from material licensed 6 * to the University of California by American Telephone and Telegraph 7 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 8 * the permission of UNIX System Laboratories, Inc. 9 * 10 * %sccs.include.redist.c% 11 * 12 * @(#)tty.h 8.6 (Berkeley) 01/21/94 13 */ 14 15 #include <sys/termios.h> 16 #include <sys/select.h> /* For struct selinfo. */ 17 18 /* 19 * Clists are character lists, which is a variable length linked list 20 * of cblocks, with a count of the number of characters in the list. 21 */ 22 struct clist { 23 int c_cc; /* Number of characters in the clist. */ 24 char *c_cf; /* Pointer to the first cblock. */ 25 char *c_cl; /* Pointer to the last cblock. */ 26 }; 27 28 /* 29 * Per-tty structure. 30 * 31 * Should be split in two, into device and tty drivers. 32 * Glue could be masks of what to echo and circular buffer 33 * (low, high, timeout). 34 */ 35 struct tty { 36 struct clist t_rawq; /* Device raw input queue. */ 37 long t_rawcc; /* Raw input queue statistics. */ 38 struct clist t_canq; /* Device canonical queue. */ 39 long t_cancc; /* Canonical queue statistics. */ 40 struct clist t_outq; /* Device output queue. */ 41 long t_outcc; /* Output queue statistics. */ 42 char t_line; /* Interface to device drivers. */ 43 dev_t t_dev; /* Device. */ 44 int t_state; /* Device and driver (TS*) state. */ 45 int t_flags; /* Tty flags. */ 46 struct pgrp *t_pgrp; /* Foreground process group. */ 47 struct session *t_session; /* Enclosing session. */ 48 struct selinfo t_rsel; /* Tty read/oob select. */ 49 struct selinfo t_wsel; /* Tty write select. */ 50 struct termios t_termios; /* Termios state. */ 51 struct winsize t_winsize; /* Window size. */ 52 /* Start output. */ 53 void (*t_oproc) __P((struct tty *)); 54 /* Stop output. */ 55 void (*t_stop) __P((struct tty *, int)); 56 /* Set hardware state. */ 57 int (*t_param) __P((struct tty *, struct termios *)); 58 void *t_sc; /* XXX: net/if_sl.c:sl_softc. */ 59 short t_column; /* Tty output column. */ 60 short t_rocount, t_rocol; /* Tty. */ 61 short t_hiwat; /* High water mark. */ 62 short t_lowat; /* Low water mark. */ 63 short t_gen; /* Generation number. */ 64 }; 65 66 #define t_cc t_termios.c_cc 67 #define t_cflag t_termios.c_cflag 68 #define t_iflag t_termios.c_iflag 69 #define t_ispeed t_termios.c_ispeed 70 #define t_lflag t_termios.c_lflag 71 #define t_min t_termios.c_min 72 #define t_oflag t_termios.c_oflag 73 #define t_ospeed t_termios.c_ospeed 74 #define t_time t_termios.c_time 75 76 #define TTIPRI 25 /* Sleep priority for tty reads. */ 77 #define TTOPRI 26 /* Sleep priority for tty writes. */ 78 79 #define TTMASK 15 80 #define OBUFSIZ 100 81 #define TTYHOG 1024 82 83 #ifdef KERNEL 84 #define TTMAXHIWAT roundup(2048, CBSIZE) 85 #define TTMINHIWAT roundup(100, CBSIZE) 86 #define TTMAXLOWAT 256 87 #define TTMINLOWAT 32 88 #endif 89 90 /* These flags are kept in t_state. */ 91 #define TS_ASLEEP 0x00001 /* Process waiting for tty. */ 92 #define TS_ASYNC 0x00002 /* Tty in async I/O mode. */ 93 #define TS_BUSY 0x00004 /* Draining output. */ 94 #define TS_CARR_ON 0x00008 /* Carrier is present. */ 95 #define TS_FLUSH 0x00010 /* Outq has been flushed during DMA. */ 96 #define TS_ISOPEN 0x00020 /* Open has completed. */ 97 #define TS_TBLOCK 0x00040 /* Further input blocked. */ 98 #define TS_TIMEOUT 0x00080 /* Wait for output char processing. */ 99 #define TS_TTSTOP 0x00100 /* Output paused. */ 100 #define TS_WOPEN 0x00200 /* Open in progress. */ 101 #define TS_XCLUDE 0x00400 /* Tty requires exclusivity. */ 102 103 /* State for intra-line fancy editing work. */ 104 #define TS_BKSL 0x00800 /* State for lowercase \ work. */ 105 #define TS_CNTTB 0x01000 /* Counting tab width, ignore FLUSHO. */ 106 #define TS_ERASE 0x02000 /* Within a \.../ for PRTRUB. */ 107 #define TS_LNCH 0x04000 /* Next character is literal. */ 108 #define TS_TYPEN 0x08000 /* Retyping suspended input (PENDIN). */ 109 #define TS_LOCAL (TS_BKSL | TS_CNTTB | TS_ERASE | TS_LNCH | TS_TYPEN) 110 111 /* Character type information. */ 112 #define ORDINARY 0 113 #define CONTROL 1 114 #define BACKSPACE 2 115 #define NEWLINE 3 116 #define TAB 4 117 #define VTAB 5 118 #define RETURN 6 119 120 struct speedtab { 121 int sp_speed; /* Speed. */ 122 int sp_code; /* Code. */ 123 }; 124 125 /* Modem control commands (driver). */ 126 #define DMSET 0 127 #define DMBIS 1 128 #define DMBIC 2 129 #define DMGET 3 130 131 /* Flags on a character passed to ttyinput. */ 132 #define TTY_CHARMASK 0x000000ff /* Character mask */ 133 #define TTY_QUOTE 0x00000100 /* Character quoted */ 134 #define TTY_ERRORMASK 0xff000000 /* Error mask */ 135 #define TTY_FE 0x01000000 /* Framing error or BREAK condition */ 136 #define TTY_PE 0x02000000 /* Parity error */ 137 138 /* Is tp controlling terminal for p? */ 139 #define isctty(p, tp) \ 140 ((p)->p_session == (tp)->t_session && (p)->p_flag & P_CONTROLT) 141 142 /* Is p in background of tp? */ 143 #define isbackground(p, tp) \ 144 (isctty((p), (tp)) && (p)->p_pgrp != (tp)->t_pgrp) 145 146 #ifdef KERNEL 147 extern struct ttychars ttydefaults; 148 149 /* Symbolic sleep message strings. */ 150 extern char ttyin[], ttyout[], ttopen[], ttclos[], ttybg[], ttybuf[]; 151 152 int b_to_q __P((char *cp, int cc, struct clist *q)); 153 void catq __P((struct clist *from, struct clist *to)); 154 void clist_init __P((void)); 155 int getc __P((struct clist *q)); 156 void ndflush __P((struct clist *q, int cc)); 157 int ndqb __P((struct clist *q, int flag)); 158 char *nextc __P((struct clist *q, char *cp, int *c)); 159 int putc __P((int c, struct clist *q)); 160 int q_to_b __P((struct clist *q, char *cp, int cc)); 161 int unputc __P((struct clist *q)); 162 163 int nullmodem __P((struct tty *tp, int flag)); 164 int tputchar __P((int c, struct tty *tp)); 165 int ttioctl __P((struct tty *tp, int com, void *data, int flag)); 166 int ttread __P((struct tty *tp, struct uio *uio, int flag)); 167 void ttrstrt __P((void *tp)); 168 int ttselect __P((dev_t device, int rw, struct proc *p)); 169 void ttsetwater __P((struct tty *tp)); 170 int ttspeedtab __P((int speed, struct speedtab *table)); 171 int ttstart __P((struct tty *tp)); 172 void ttwakeup __P((struct tty *tp)); 173 int ttwrite __P((struct tty *tp, struct uio *uio, int flag)); 174 void ttychars __P((struct tty *tp)); 175 int ttycheckoutq __P((struct tty *tp, int wait)); 176 int ttyclose __P((struct tty *tp)); 177 void ttyflush __P((struct tty *tp, int rw)); 178 void ttyinfo __P((struct tty *tp)); 179 int ttyinput __P((int c, struct tty *tp)); 180 int ttylclose __P((struct tty *tp, int flag)); 181 int ttymodem __P((struct tty *tp, int flag)); 182 int ttyopen __P((dev_t device, struct tty *tp)); 183 int ttyoutput __P((int c, struct tty *tp)); 184 void ttypend __P((struct tty *tp)); 185 void ttyretype __P((struct tty *tp)); 186 void ttyrub __P((int c, struct tty *tp)); 187 int ttysleep __P((struct tty *tp, 188 void *chan, int pri, char *wmesg, int timeout)); 189 int ttywait __P((struct tty *tp)); 190 int ttywflush __P((struct tty *tp)); 191 #endif 192