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38 * @(#)tty.h 8.6 (Berkeley) 1/21/94
45 #include <sys/termios.h>
46 #include <sys/queue.h>
47 #include <sys/selinfo.h>
50 * Clists are character lists, which is a variable length linked list
51 * of cblocks, with a count of the number of characters in the list.
54 int c_cc; /* Number of characters in the clist. */
55 int c_cbcount; /* Number of cblocks. */
56 int c_cbmax; /* Max # cblocks allowed for this clist. */
57 int c_cbreserved; /* # cblocks reserved for this clist. */
58 char *c_cf; /* Pointer to the first cblock. */
59 char *c_cl; /* Pointer to the last cblock. */
65 * Should be split in two, into device and tty drivers.
66 * Glue could be masks of what to echo and circular buffer
67 * (low, high, timeout).
70 struct clist t_rawq; /* Device raw input queue. */
71 long t_rawcc; /* Raw input queue statistics. */
72 struct clist t_canq; /* Device canonical queue. */
73 long t_cancc; /* Canonical queue statistics. */
74 struct clist t_outq; /* Device output queue. */
75 long t_outcc; /* Output queue statistics. */
76 int t_line; /* Interface to device drivers. */
78 dev_t t_kdev; /* Device. */
79 udev_t t_udev; /* Userland (sysctl) instance. */
80 void *t_devp; /* Keep user/kernel size in sync. */
82 int t_state; /* Device and driver (TS*) state. */
83 int t_flags; /* Tty flags. */
84 int t_timeout; /* Timeout for ttywait() */
85 struct pgrp *t_pgrp; /* Foreground process group. */
86 struct session *t_session; /* Enclosing session. */
87 struct sigio *t_sigio; /* Information for async I/O. */
88 struct selinfo t_rsel; /* Tty read/oob select. */
89 struct selinfo t_wsel; /* Tty write select. */
90 struct termios t_termios; /* Termios state. */
91 struct winsize t_winsize; /* Window size. */
93 void (*t_oproc)(struct tty *);
95 void (*t_stop)(struct tty *, int);
96 /* Set hardware state. */
97 int (*t_param)(struct tty *, struct termios *);
98 void *t_sc; /* XXX: net/if_sl.c:sl_softc. */
99 int t_column; /* Tty output column. */
100 int t_rocount, t_rocol; /* Tty. */
101 int t_ififosize; /* Total size of upstream fifos. */
102 int t_ihiwat; /* High water mark for input. */
103 int t_ilowat; /* Low water mark for input. */
104 speed_t t_ispeedwat; /* t_ispeed override for watermarks. */
105 int t_ohiwat; /* High water mark for output. */
106 int t_olowat; /* Low water mark for output. */
107 speed_t t_ospeedwat; /* t_ospeed override for watermarks. */
108 int t_gen; /* Generation number. */
109 SLIST_ENTRY(tty) t_list; /* Global chain of ttys for pstat(8) */
112 #define t_cc t_termios.c_cc
113 #define t_cflag t_termios.c_cflag
114 #define t_dev ttyu.t_kdev
115 #define t_iflag t_termios.c_iflag
116 #define t_ispeed t_termios.c_ispeed
117 #define t_lflag t_termios.c_lflag
118 #define t_min t_termios.c_min
119 #define t_oflag t_termios.c_oflag
120 #define t_ospeed t_termios.c_ospeed
121 #define t_time t_termios.c_time
123 #define TTIPRI (PSOCK + 1) /* Sleep priority for tty reads. */
124 #define TTOPRI (PSOCK + 2) /* Sleep priority for tty writes. */
127 * User data unfortunately has to be copied through buffers on the way to
128 * and from clists. The buffers are on the stack so their sizes must be
131 #define IBUFSIZ 384 /* Should be >= max value of MIN. */
139 #define TTMAXHIWAT roundup(2048, CBSIZE)
140 #define TTMINHIWAT roundup(100, CBSIZE)
141 #define TTMAXLOWAT 256
142 #define TTMINLOWAT 32
145 /* These flags are kept in t_state. */
146 #define TS_SO_OLOWAT 0x00001 /* Wake up when output <= low water. */
147 #define TS_ASYNC 0x00002 /* Tty in async I/O mode. */
148 #define TS_BUSY 0x00004 /* Draining output. */
149 #define TS_CARR_ON 0x00008 /* Carrier is present. */
150 #define TS_FLUSH 0x00010 /* Outq has been flushed during DMA. */
151 #define TS_ISOPEN 0x00020 /* Open has completed. */
152 #define TS_TBLOCK 0x00040 /* Further input blocked. */
153 #define TS_TIMEOUT 0x00080 /* Wait for output char processing. */
154 #define TS_TTSTOP 0x00100 /* Output paused. */
156 #define TS_WOPEN 0x00200 /* Open in progress. */
158 #define TS_XCLUDE 0x00400 /* Tty requires exclusivity. */
160 /* State for intra-line fancy editing work. */
161 #define TS_BKSL 0x00800 /* State for lowercase \ work. */
162 #define TS_CNTTB 0x01000 /* Counting tab width, ignore FLUSHO. */
163 #define TS_ERASE 0x02000 /* Within a \.../ for PRTRUB. */
164 #define TS_LNCH 0x04000 /* Next character is literal. */
165 #define TS_TYPEN 0x08000 /* Retyping suspended input (PENDIN). */
166 #define TS_LOCAL (TS_BKSL | TS_CNTTB | TS_ERASE | TS_LNCH | TS_TYPEN)
169 #define TS_CAN_BYPASS_L_RINT 0x010000 /* Device in "raw" mode. */
170 #define TS_CONNECTED 0x020000 /* Connection open. */
171 #define TS_SNOOP 0x040000 /* Device is being snooped on. */
172 #define TS_SO_OCOMPLETE 0x080000 /* Wake up when output completes. */
173 #define TS_ZOMBIE 0x100000 /* Connection lost. */
175 /* Hardware flow-control-invoked bits. */
176 #define TS_CAR_OFLOW 0x200000 /* For MDMBUF (XXX handle in driver). */
178 #define TS_CTS_OFLOW 0x400000 /* For CCTS_OFLOW. */
179 #define TS_DSR_OFLOW 0x800000 /* For CDSR_OFLOW. */
182 /* Character type information. */
192 int sp_speed; /* Speed. */
193 int sp_code; /* Code. */
196 /* Modem control commands (driver). */
202 /* Flags on a character passed to ttyinput. */
203 #define TTY_CHARMASK 0x000000ff /* Character mask */
204 #define TTY_QUOTE 0x00000100 /* Character quoted */
205 #define TTY_ERRORMASK 0xff000000 /* Error mask */
206 #define TTY_FE 0x01000000 /* Framing error */
207 #define TTY_PE 0x02000000 /* Parity error */
208 #define TTY_OE 0x04000000 /* Overrun error */
209 #define TTY_BI 0x08000000 /* Break condition */
211 /* Is tp controlling terminal for p? */
212 #define isctty(p, tp) \
213 ((p)->p_session == (tp)->t_session && (p)->p_flag & P_CONTROLT)
215 /* Is p in background of tp? */
216 #define isbackground(p, tp) \
217 (isctty((p), (tp)) && (p)->p_pgrp != (tp)->t_pgrp)
219 /* Unique sleep addresses. */
220 #define TSA_CARR_ON(tp) ((void *)&(tp)->t_rawq)
221 #define TSA_HUP_OR_INPUT(tp) ((void *)&(tp)->t_rawq.c_cf)
222 #define TSA_OCOMPLETE(tp) ((void *)&(tp)->t_outq.c_cl)
223 #define TSA_OLOWAT(tp) ((void *)&(tp)->t_outq)
224 #define TSA_PTC_READ(tp) ((void *)&(tp)->t_outq.c_cf)
225 #define TSA_PTC_WRITE(tp) ((void *)&(tp)->t_rawq.c_cl)
226 #define TSA_PTS_READ(tp) ((void *)&(tp)->t_canq)
229 #ifdef MALLOC_DECLARE
230 MALLOC_DECLARE(M_TTYS);
232 extern struct tty *constty; /* Temporary virtual console. */
234 int b_to_q(char *cp, int cc, struct clist *q);
235 void catq(struct clist *from, struct clist *to);
236 void clist_alloc_cblocks(struct clist *q, int ccmax, int ccres);
237 void clist_free_cblocks(struct clist *q);
238 int getc(struct clist *q);
239 void ndflush(struct clist *q, int cc);
240 char *nextc(struct clist *q, char *cp, int *c);
241 void nottystop(struct tty *tp, int rw);
242 int putc(int c, struct clist *q);
243 int q_to_b(struct clist *q, char *cp, int cc);
244 void termioschars(struct termios *t);
245 int tputchar(int c, struct tty *tp);
246 int ttcompat(struct tty *tp, u_long com, caddr_t data, int flag);
247 int ttioctl(struct tty *tp, u_long com, void *data, int flag);
248 int ttread(struct tty *tp, struct uio *uio, int flag);
249 void ttrstrt(void *tp);
250 int ttsetcompat(struct tty *tp, u_long *com, caddr_t data,
251 struct termios *term);
252 void ttsetwater(struct tty *tp);
253 int ttspeedtab(int speed, struct speedtab *table);
254 int ttstart(struct tty *tp);
255 void ttwakeup(struct tty *tp);
256 int ttwrite(struct tty *tp, struct uio *uio, int flag);
257 void ttwwakeup(struct tty *tp);
258 void ttyblock(struct tty *tp);
259 void ttychars(struct tty *tp);
260 int ttycheckoutq(struct tty *tp, int wait);
261 int ttyclose(struct tty *tp);
262 void ttyflush(struct tty *tp, int rw);
263 void ttyfree(struct tty *tp);
264 void ttyinfo(struct tty *tp);
265 int ttyinput(int c, struct tty *tp);
266 int ttykqfilter(dev_t dev, struct knote *kn);
267 int ttylclose(struct tty *tp, int flag);
268 struct tty *ttymalloc(struct tty *tp);
269 int ttymodem(struct tty *tp, int flag);
270 int ttyopen(dev_t device, struct tty *tp);
271 int ttypoll(dev_t dev, int events, struct thread *td);
272 int ttyread(dev_t dev, struct uio *uio, int flag);
273 void ttyregister(struct tty *tp);
274 int ttysleep(struct tty *tp, void *chan, int pri, char *wmesg,
276 int ttywait(struct tty *tp);
277 int ttywrite(dev_t dev, struct uio *uio, int flag);
278 int unputc(struct clist *q);
282 #endif /* !_SYS_TTY_H_ */