1 76193d7c 2003-09-30 devnull #include <u.h>
  2 76193d7c 2003-09-30 devnull #include <libc.h>
  3 76193d7c 2003-09-30 devnull #include <draw.h>
  4 76193d7c 2003-09-30 devnull #include <cursor.h>
  5 76193d7c 2003-09-30 devnull #include <event.h>
  6 76193d7c 2003-09-30 devnull 
  7 76193d7c 2003-09-30 devnull typedef struct	Slave Slave;
  8 76193d7c 2003-09-30 devnull typedef struct	Ebuf Ebuf;
  9 76193d7c 2003-09-30 devnull 
 10 76193d7c 2003-09-30 devnull struct Slave
 11 76193d7c 2003-09-30 devnull {
 12 76193d7c 2003-09-30 devnull 	int	pid;
 13 76193d7c 2003-09-30 devnull 	Ebuf	*head;		/* ueue of messages for this descriptor */
 14 76193d7c 2003-09-30 devnull 	Ebuf	*tail;
 15 76193d7c 2003-09-30 devnull 	int	(*fn)(int, Event*, uchar*, int);
 16 76193d7c 2003-09-30 devnull };
 17 76193d7c 2003-09-30 devnull 
 18 76193d7c 2003-09-30 devnull struct Ebuf
 19 76193d7c 2003-09-30 devnull {
 20 76193d7c 2003-09-30 devnull 	Ebuf	*next;
 21 76193d7c 2003-09-30 devnull 	int	n;		/* number of bytes in buf */
 22 76193d7c 2003-09-30 devnull 	uchar	buf[EMAXMSG];
 23 76193d7c 2003-09-30 devnull };
 24 76193d7c 2003-09-30 devnull 
 25 76193d7c 2003-09-30 devnull static	Slave	eslave[MAXSLAVE];
 26 76193d7c 2003-09-30 devnull static	int	Skeyboard = -1;
 27 76193d7c 2003-09-30 devnull static	int	Smouse = -1;
 28 76193d7c 2003-09-30 devnull static	int	Stimer = -1;
 29 76193d7c 2003-09-30 devnull static	int	logfid;
 30 76193d7c 2003-09-30 devnull 
 31 76193d7c 2003-09-30 devnull static	int	nslave;
 32 76193d7c 2003-09-30 devnull static	int	parentpid;
 33 76193d7c 2003-09-30 devnull static	int	epipe[2];
 34 76193d7c 2003-09-30 devnull static	int	eforkslave(ulong);
 35 76193d7c 2003-09-30 devnull static	void	extract(void);
 36 76193d7c 2003-09-30 devnull static	void	ekill(void);
 37 76193d7c 2003-09-30 devnull static	int	enote(void *, char *);
 38 76193d7c 2003-09-30 devnull static	int	mousefd;
 39 76193d7c 2003-09-30 devnull static	int	cursorfd;
 40 76193d7c 2003-09-30 devnull 
 41 76193d7c 2003-09-30 devnull static
 42 76193d7c 2003-09-30 devnull Ebuf*
 43 76193d7c 2003-09-30 devnull ebread(Slave *s)
 44 76193d7c 2003-09-30 devnull {
 45 76193d7c 2003-09-30 devnull 	Ebuf *eb;
 46 76193d7c 2003-09-30 devnull 	Dir *d;
 47 76193d7c 2003-09-30 devnull 	ulong l;
 48 76193d7c 2003-09-30 devnull 
 49 76193d7c 2003-09-30 devnull 	for(;;){
 50 76193d7c 2003-09-30 devnull 		d = dirfstat(epipe[0]);
 51 76193d7c 2003-09-30 devnull 		if(d == nil)
 52 76193d7c 2003-09-30 devnull 			drawerror(display, "events: eread stat error");
 53 76193d7c 2003-09-30 devnull 		l = d->length;
 54 76193d7c 2003-09-30 devnull 		free(d);
 55 76193d7c 2003-09-30 devnull 		if(s->head && l==0)
 56 76193d7c 2003-09-30 devnull 			break;
 57 76193d7c 2003-09-30 devnull 		extract();
 58 76193d7c 2003-09-30 devnull 	}
 59 76193d7c 2003-09-30 devnull 	eb = s->head;
 60 76193d7c 2003-09-30 devnull 	s->head = s->head->next;
 61 76193d7c 2003-09-30 devnull 	if(s->head == 0)
 62 76193d7c 2003-09-30 devnull 		s->tail = 0;
 63 76193d7c 2003-09-30 devnull 	return eb;
 64 76193d7c 2003-09-30 devnull }
 65 76193d7c 2003-09-30 devnull 
 66 76193d7c 2003-09-30 devnull ulong
 67 76193d7c 2003-09-30 devnull event(Event *e)
 68 76193d7c 2003-09-30 devnull {
 69 76193d7c 2003-09-30 devnull 	return eread(~0UL, e);
 70 76193d7c 2003-09-30 devnull }
 71 76193d7c 2003-09-30 devnull 
 72 76193d7c 2003-09-30 devnull ulong
 73 76193d7c 2003-09-30 devnull eread(ulong keys, Event *e)
 74 76193d7c 2003-09-30 devnull {
 75 76193d7c 2003-09-30 devnull 	Ebuf *eb;
 76 76193d7c 2003-09-30 devnull 	int i, id;
 77 76193d7c 2003-09-30 devnull 
 78 76193d7c 2003-09-30 devnull 	if(keys == 0)
 79 76193d7c 2003-09-30 devnull 		return 0;
 80 76193d7c 2003-09-30 devnull 	for(;;){
 81 76193d7c 2003-09-30 devnull 		for(i=0; i<nslave; i++)
 82 76193d7c 2003-09-30 devnull 			if((keys & (1<<i)) && eslave[i].head){
 83 76193d7c 2003-09-30 devnull 				id = 1<<i;
 84 76193d7c 2003-09-30 devnull 				if(i == Smouse)
 85 76193d7c 2003-09-30 devnull 					e->mouse = emouse();
 86 76193d7c 2003-09-30 devnull 				else if(i == Skeyboard)
 87 76193d7c 2003-09-30 devnull 					e->kbdc = ekbd();
 88 76193d7c 2003-09-30 devnull 				else if(i == Stimer)
 89 76193d7c 2003-09-30 devnull 					eslave[i].head = 0;
 90 76193d7c 2003-09-30 devnull 				else{
 91 76193d7c 2003-09-30 devnull 					eb = ebread(&eslave[i]);
 92 76193d7c 2003-09-30 devnull 					e->n = eb->n;
 93 76193d7c 2003-09-30 devnull 					if(eslave[i].fn)
 94 76193d7c 2003-09-30 devnull 						id = (*eslave[i].fn)(id, e, eb->buf, eb->n);
 95 76193d7c 2003-09-30 devnull 					else
 96 76193d7c 2003-09-30 devnull 						memmove(e->data, eb->buf, eb->n);
 97 76193d7c 2003-09-30 devnull 					free(eb);
 98 76193d7c 2003-09-30 devnull 				}
 99 76193d7c 2003-09-30 devnull 				return id;
100 76193d7c 2003-09-30 devnull 			}
101 76193d7c 2003-09-30 devnull 		extract();
102 76193d7c 2003-09-30 devnull 	}
103 76193d7c 2003-09-30 devnull 	return 0;
104 76193d7c 2003-09-30 devnull }
105 76193d7c 2003-09-30 devnull 
106 76193d7c 2003-09-30 devnull int
107 76193d7c 2003-09-30 devnull ecanmouse(void)
108 76193d7c 2003-09-30 devnull {
109 76193d7c 2003-09-30 devnull 	if(Smouse < 0)
110 76193d7c 2003-09-30 devnull 		drawerror(display, "events: mouse not initialized");
111 76193d7c 2003-09-30 devnull 	return ecanread(Emouse);
112 76193d7c 2003-09-30 devnull }
113 76193d7c 2003-09-30 devnull 
114 76193d7c 2003-09-30 devnull int
115 76193d7c 2003-09-30 devnull ecankbd(void)
116 76193d7c 2003-09-30 devnull {
117 76193d7c 2003-09-30 devnull 	if(Skeyboard < 0)
118 76193d7c 2003-09-30 devnull 		drawerror(display, "events: keyboard not initialzed");
119 76193d7c 2003-09-30 devnull 	return ecanread(Ekeyboard);
120 76193d7c 2003-09-30 devnull }
121 76193d7c 2003-09-30 devnull 
122 76193d7c 2003-09-30 devnull int
123 76193d7c 2003-09-30 devnull ecanread(ulong keys)
124 76193d7c 2003-09-30 devnull {
125 76193d7c 2003-09-30 devnull 	Dir *d;
126 76193d7c 2003-09-30 devnull 	int i;
127 76193d7c 2003-09-30 devnull 	ulong l;
128 76193d7c 2003-09-30 devnull 
129 76193d7c 2003-09-30 devnull 	for(;;){
130 76193d7c 2003-09-30 devnull 		for(i=0; i<nslave; i++)
131 76193d7c 2003-09-30 devnull 			if((keys & (1<<i)) && eslave[i].head)
132 76193d7c 2003-09-30 devnull 				return 1;
133 76193d7c 2003-09-30 devnull 		d = dirfstat(epipe[0]);
134 76193d7c 2003-09-30 devnull 		if(d == nil)
135 76193d7c 2003-09-30 devnull 			drawerror(display, "events: ecanread stat error");
136 76193d7c 2003-09-30 devnull 		l = d->length;
137 76193d7c 2003-09-30 devnull 		free(d);
138 76193d7c 2003-09-30 devnull 		if(l == 0)
139 76193d7c 2003-09-30 devnull 			return 0;
140 76193d7c 2003-09-30 devnull 		extract();
141 76193d7c 2003-09-30 devnull 	}
142 76193d7c 2003-09-30 devnull 	return -1;
143 76193d7c 2003-09-30 devnull }
144 76193d7c 2003-09-30 devnull 
145 76193d7c 2003-09-30 devnull ulong
146 76193d7c 2003-09-30 devnull estartfn(ulong key, int fd, int n, int (*fn)(int, Event*, uchar*, int))
147 76193d7c 2003-09-30 devnull {
148 76193d7c 2003-09-30 devnull 	char buf[EMAXMSG+1];
149 76193d7c 2003-09-30 devnull 	int i, r;
150 76193d7c 2003-09-30 devnull 
151 76193d7c 2003-09-30 devnull 	if(fd < 0)
152 76193d7c 2003-09-30 devnull 		drawerror(display, "events: bad file descriptor");
153 76193d7c 2003-09-30 devnull 	if(n <= 0 || n > EMAXMSG)
154 76193d7c 2003-09-30 devnull 		n = EMAXMSG;
155 76193d7c 2003-09-30 devnull 	i = eforkslave(key);
156 76193d7c 2003-09-30 devnull 	if(i < MAXSLAVE){
157 76193d7c 2003-09-30 devnull 		eslave[i].fn = fn;
158 76193d7c 2003-09-30 devnull 		return 1<<i;
159 76193d7c 2003-09-30 devnull 	}
160 76193d7c 2003-09-30 devnull 	buf[0] = i - MAXSLAVE;
161 76193d7c 2003-09-30 devnull 	while((r = read(fd, buf+1, n))>0)
162 76193d7c 2003-09-30 devnull 		if(write(epipe[1], buf, r+1)!=r+1)
163 76193d7c 2003-09-30 devnull 			break;
164 76193d7c 2003-09-30 devnull 	buf[0] = MAXSLAVE;
165 76193d7c 2003-09-30 devnull 	write(epipe[1], buf, 1);
166 76193d7c 2003-09-30 devnull 	_exits(0);
167 76193d7c 2003-09-30 devnull 	return 0;
168 76193d7c 2003-09-30 devnull }
169 76193d7c 2003-09-30 devnull 
170 76193d7c 2003-09-30 devnull ulong
171 76193d7c 2003-09-30 devnull estart(ulong key, int fd, int n)
172 76193d7c 2003-09-30 devnull {
173 76193d7c 2003-09-30 devnull 	return estartfn(key, fd, n, nil);
174 76193d7c 2003-09-30 devnull }
175 76193d7c 2003-09-30 devnull 
176 76193d7c 2003-09-30 devnull ulong
177 76193d7c 2003-09-30 devnull etimer(ulong key, int n)
178 76193d7c 2003-09-30 devnull {
179 76193d7c 2003-09-30 devnull 	char t[2];
180 76193d7c 2003-09-30 devnull 
181 76193d7c 2003-09-30 devnull 	if(Stimer != -1)
182 76193d7c 2003-09-30 devnull 		drawerror(display, "events: timer started twice");
183 76193d7c 2003-09-30 devnull 	Stimer = eforkslave(key);
184 76193d7c 2003-09-30 devnull 	if(Stimer < MAXSLAVE)
185 76193d7c 2003-09-30 devnull 		return 1<<Stimer;
186 76193d7c 2003-09-30 devnull 	if(n <= 0)
187 76193d7c 2003-09-30 devnull 		n = 1000;
188 76193d7c 2003-09-30 devnull 	t[0] = t[1] = Stimer - MAXSLAVE;
189 76193d7c 2003-09-30 devnull 	do
190 76193d7c 2003-09-30 devnull 		sleep(n);
191 76193d7c 2003-09-30 devnull 	while(write(epipe[1], t, 2) == 2);
192 76193d7c 2003-09-30 devnull 	t[0] = MAXSLAVE;
193 76193d7c 2003-09-30 devnull 	write(epipe[1], t, 1);
194 76193d7c 2003-09-30 devnull 	_exits(0);
195 76193d7c 2003-09-30 devnull 	return 0;
196 76193d7c 2003-09-30 devnull }
197 76193d7c 2003-09-30 devnull 
198 76193d7c 2003-09-30 devnull static void
199 76193d7c 2003-09-30 devnull ekeyslave(int fd)
200 76193d7c 2003-09-30 devnull {
201 76193d7c 2003-09-30 devnull 	Rune r;
202 76193d7c 2003-09-30 devnull 	char t[3], k[10];
203 76193d7c 2003-09-30 devnull 	int kr, kn, w;
204 76193d7c 2003-09-30 devnull 
205 76193d7c 2003-09-30 devnull 	if(eforkslave(Ekeyboard) < MAXSLAVE)
206 76193d7c 2003-09-30 devnull 		return;
207 76193d7c 2003-09-30 devnull 	kn = 0;
208 76193d7c 2003-09-30 devnull 	t[0] = Skeyboard;
209 76193d7c 2003-09-30 devnull 	for(;;){
210 76193d7c 2003-09-30 devnull 		while(!fullrune(k, kn)){
211 76193d7c 2003-09-30 devnull 			kr = read(fd, k+kn, sizeof k - kn);
212 76193d7c 2003-09-30 devnull 			if(kr <= 0)
213 76193d7c 2003-09-30 devnull 				goto breakout;
214 76193d7c 2003-09-30 devnull 			kn += kr;
215 76193d7c 2003-09-30 devnull 		}
216 76193d7c 2003-09-30 devnull 		w = chartorune(&r, k);
217 76193d7c 2003-09-30 devnull 		kn -= w;
218 76193d7c 2003-09-30 devnull 		memmove(k, &k[w], kn);
219 76193d7c 2003-09-30 devnull 		t[1] = r;
220 76193d7c 2003-09-30 devnull 		t[2] = r>>8;
221 76193d7c 2003-09-30 devnull 		if(write(epipe[1], t, 3) != 3)
222 76193d7c 2003-09-30 devnull 			break;
223 76193d7c 2003-09-30 devnull 	}
224 76193d7c 2003-09-30 devnull breakout:;
225 76193d7c 2003-09-30 devnull 	t[0] = MAXSLAVE;
226 76193d7c 2003-09-30 devnull 	write(epipe[1], t, 1);
227 76193d7c 2003-09-30 devnull 	_exits(0);
228 76193d7c 2003-09-30 devnull }
229 76193d7c 2003-09-30 devnull 
230 76193d7c 2003-09-30 devnull void
231 76193d7c 2003-09-30 devnull einit(ulong keys)
232 76193d7c 2003-09-30 devnull {
233 76193d7c 2003-09-30 devnull 	int ctl, fd;
234 76193d7c 2003-09-30 devnull 	char buf[256];
235 76193d7c 2003-09-30 devnull 
236 76193d7c 2003-09-30 devnull 	parentpid = getpid();
237 76193d7c 2003-09-30 devnull 	if(pipe(epipe) < 0)
238 76193d7c 2003-09-30 devnull 		drawerror(display, "events: einit pipe");
239 76193d7c 2003-09-30 devnull 	atexit(ekill);
240 76193d7c 2003-09-30 devnull 	atnotify(enote, 1);
241 76193d7c 2003-09-30 devnull 	snprint(buf, sizeof buf, "%s/mouse", display->devdir);
242 76193d7c 2003-09-30 devnull 	mousefd = open(buf, ORDWR|OCEXEC);
243 76193d7c 2003-09-30 devnull 	if(mousefd < 0)
244 76193d7c 2003-09-30 devnull 		drawerror(display, "einit: can't open mouse\n");
245 76193d7c 2003-09-30 devnull 	snprint(buf, sizeof buf, "%s/cursor", display->devdir);
246 76193d7c 2003-09-30 devnull 	cursorfd = open(buf, ORDWR|OCEXEC);
247 76193d7c 2003-09-30 devnull 	if(cursorfd < 0)
248 76193d7c 2003-09-30 devnull 		drawerror(display, "einit: can't open cursor\n");
249 76193d7c 2003-09-30 devnull 	if(keys&Ekeyboard){
250 76193d7c 2003-09-30 devnull 		snprint(buf, sizeof buf, "%s/cons", display->devdir);
251 76193d7c 2003-09-30 devnull 		fd = open(buf, OREAD);
252 76193d7c 2003-09-30 devnull 		if(fd < 0)
253 76193d7c 2003-09-30 devnull 			drawerror(display, "events: can't open console");
254 76193d7c 2003-09-30 devnull 		snprint(buf, sizeof buf, "%s/consctl", display->devdir);
255 76193d7c 2003-09-30 devnull 		ctl = open("/dev/consctl", OWRITE|OCEXEC);
256 76193d7c 2003-09-30 devnull 		if(ctl < 0)
257 76193d7c 2003-09-30 devnull 			drawerror(display, "events: can't open consctl");
258 76193d7c 2003-09-30 devnull 		write(ctl, "rawon", 5);
259 76193d7c 2003-09-30 devnull 		for(Skeyboard=0; Ekeyboard & ~(1<<Skeyboard); Skeyboard++)
260 76193d7c 2003-09-30 devnull 			;
261 76193d7c 2003-09-30 devnull 		ekeyslave(fd);
262 76193d7c 2003-09-30 devnull 	}
263 76193d7c 2003-09-30 devnull 	if(keys&Emouse){
264 76193d7c 2003-09-30 devnull 		estart(Emouse, mousefd, 1+4*12);
265 76193d7c 2003-09-30 devnull 		for(Smouse=0; Emouse & ~(1<<Smouse); Smouse++)
266 76193d7c 2003-09-30 devnull 			;
267 76193d7c 2003-09-30 devnull 	}
268 76193d7c 2003-09-30 devnull }
269 76193d7c 2003-09-30 devnull 
270 76193d7c 2003-09-30 devnull static void
271 76193d7c 2003-09-30 devnull extract(void)
272 76193d7c 2003-09-30 devnull {
273 76193d7c 2003-09-30 devnull 	Slave *s;
274 76193d7c 2003-09-30 devnull 	Ebuf *eb;
275 76193d7c 2003-09-30 devnull 	int i, n;
276 76193d7c 2003-09-30 devnull 	uchar ebuf[EMAXMSG+1];
277 76193d7c 2003-09-30 devnull 
278 76193d7c 2003-09-30 devnull 	/* avoid generating a message if there's nothing to show. */
279 76193d7c 2003-09-30 devnull 	/* this test isn't perfect, though; could do flushimage(display, 0) then call extract */
280 76193d7c 2003-09-30 devnull 	/* also: make sure we don't interfere if we're multiprocessing the display */
281 76193d7c 2003-09-30 devnull 	if(display->locking){
282 76193d7c 2003-09-30 devnull 		/* if locking is being done by program, this means it can't depend on automatic flush in emouse() etc. */
283 76193d7c 2003-09-30 devnull 		if(canqlock(&display->qlock)){
284 76193d7c 2003-09-30 devnull 			if(display->bufp > display->buf)
285 76193d7c 2003-09-30 devnull 				flushimage(display, 1);
286 76193d7c 2003-09-30 devnull 			unlockdisplay(display);
287 76193d7c 2003-09-30 devnull 		}
288 76193d7c 2003-09-30 devnull 	}else
289 76193d7c 2003-09-30 devnull 		if(display->bufp > display->buf)
290 76193d7c 2003-09-30 devnull 			flushimage(display, 1);
291 76193d7c 2003-09-30 devnull loop:
292 76193d7c 2003-09-30 devnull 	if((n=read(epipe[0], ebuf, EMAXMSG+1)) < 0
293 76193d7c 2003-09-30 devnull 	|| ebuf[0] >= MAXSLAVE)
294 76193d7c 2003-09-30 devnull 		drawerror(display, "eof on event pipe");
295 76193d7c 2003-09-30 devnull 	if(n == 0)
296 76193d7c 2003-09-30 devnull 		goto loop;
297 76193d7c 2003-09-30 devnull 	i = ebuf[0];
298 76193d7c 2003-09-30 devnull 	if(i >= nslave || n <= 1)
299 76193d7c 2003-09-30 devnull 		drawerror(display, "events: protocol error: short read");
300 76193d7c 2003-09-30 devnull 	s = &eslave[i];
301 76193d7c 2003-09-30 devnull 	if(i == Stimer){
302 76193d7c 2003-09-30 devnull 		s->head = (Ebuf *)1;
303 76193d7c 2003-09-30 devnull 		return;
304 76193d7c 2003-09-30 devnull 	}
305 76193d7c 2003-09-30 devnull 	if(i == Skeyboard && n != 3)
306 76193d7c 2003-09-30 devnull 		drawerror(display, "events: protocol error: keyboard");
307 76193d7c 2003-09-30 devnull 	if(i == Smouse){
308 76193d7c 2003-09-30 devnull 		if(n < 1+1+2*12)
309 76193d7c 2003-09-30 devnull 			drawerror(display, "events: protocol error: mouse");
310 76193d7c 2003-09-30 devnull 		if(ebuf[1] == 'r')
311 76193d7c 2003-09-30 devnull 			eresized(1);
312 76193d7c 2003-09-30 devnull 		/* squash extraneous mouse events */
313 76193d7c 2003-09-30 devnull 		if((eb=s->tail) && memcmp(eb->buf+1+2*12, ebuf+1+1+2*12, 12)==0){
314 76193d7c 2003-09-30 devnull 			memmove(eb->buf, &ebuf[1], n - 1);
315 76193d7c 2003-09-30 devnull 			return;
316 76193d7c 2003-09-30 devnull 		}
317 76193d7c 2003-09-30 devnull 	}
318 76193d7c 2003-09-30 devnull 	/* try to save space by only allocating as much buffer as we need */
319 76193d7c 2003-09-30 devnull 	eb = malloc(sizeof(*eb) - sizeof(eb->buf) + n - 1);
320 76193d7c 2003-09-30 devnull 	if(eb == 0)
321 76193d7c 2003-09-30 devnull 		drawerror(display, "events: protocol error 4");
322 76193d7c 2003-09-30 devnull 	eb->n = n - 1;
323 76193d7c 2003-09-30 devnull 	memmove(eb->buf, &ebuf[1], n - 1);
324 76193d7c 2003-09-30 devnull 	eb->next = 0;
325 76193d7c 2003-09-30 devnull 	if(s->head)
326 76193d7c 2003-09-30 devnull 		s->tail = s->tail->next = eb;
327 76193d7c 2003-09-30 devnull 	else
328 76193d7c 2003-09-30 devnull 		s->head = s->tail = eb;
329 76193d7c 2003-09-30 devnull }
330 76193d7c 2003-09-30 devnull 
331 76193d7c 2003-09-30 devnull static int
332 76193d7c 2003-09-30 devnull eforkslave(ulong key)
333 76193d7c 2003-09-30 devnull {
334 76193d7c 2003-09-30 devnull 	int i, pid;
335 76193d7c 2003-09-30 devnull 
336 76193d7c 2003-09-30 devnull 	for(i=0; i<MAXSLAVE; i++)
337 76193d7c 2003-09-30 devnull 		if((key & ~(1<<i)) == 0 && eslave[i].pid == 0){
338 76193d7c 2003-09-30 devnull 			if(nslave <= i)
339 76193d7c 2003-09-30 devnull 				nslave = i + 1;
340 76193d7c 2003-09-30 devnull 			/*
341 76193d7c 2003-09-30 devnull 			 * share the file descriptors so the last child
342 76193d7c 2003-09-30 devnull 			 * out closes all connections to the window server.
343 76193d7c 2003-09-30 devnull 			 */
344 76193d7c 2003-09-30 devnull 			switch(pid = rfork(RFPROC)){
345 76193d7c 2003-09-30 devnull 			case 0:
346 76193d7c 2003-09-30 devnull 				return MAXSLAVE+i;
347 76193d7c 2003-09-30 devnull 			case -1:
348 76193d7c 2003-09-30 devnull 				fprint(2, "events: fork error\n");
349 76193d7c 2003-09-30 devnull 				exits("fork");
350 76193d7c 2003-09-30 devnull 			}
351 76193d7c 2003-09-30 devnull 			eslave[i].pid = pid;
352 76193d7c 2003-09-30 devnull 			eslave[i].head = eslave[i].tail = 0;
353 76193d7c 2003-09-30 devnull 			return i;
354 76193d7c 2003-09-30 devnull 		}
355 76193d7c 2003-09-30 devnull 	drawerror(display, "events: bad slave assignment");
356 76193d7c 2003-09-30 devnull 	return 0;
357 76193d7c 2003-09-30 devnull }
358 76193d7c 2003-09-30 devnull 
359 76193d7c 2003-09-30 devnull static int
360 76193d7c 2003-09-30 devnull enote(void *v, char *s)
361 76193d7c 2003-09-30 devnull {
362 76193d7c 2003-09-30 devnull 	char t[1];
363 76193d7c 2003-09-30 devnull 	int i, pid;
364 76193d7c 2003-09-30 devnull 
365 76193d7c 2003-09-30 devnull 	USED(v, s);
366 76193d7c 2003-09-30 devnull 	pid = getpid();
367 76193d7c 2003-09-30 devnull 	if(pid != parentpid){
368 76193d7c 2003-09-30 devnull 		for(i=0; i<nslave; i++){
369 76193d7c 2003-09-30 devnull 			if(pid == eslave[i].pid){
370 76193d7c 2003-09-30 devnull 				t[0] = MAXSLAVE;
371 76193d7c 2003-09-30 devnull 				write(epipe[1], t, 1);
372 76193d7c 2003-09-30 devnull 				break;
373 76193d7c 2003-09-30 devnull 			}
374 76193d7c 2003-09-30 devnull 		}
375 76193d7c 2003-09-30 devnull 		return 0;
376 76193d7c 2003-09-30 devnull 	}
377 76193d7c 2003-09-30 devnull 	close(epipe[0]);
378 76193d7c 2003-09-30 devnull 	epipe[0] = -1;
379 76193d7c 2003-09-30 devnull 	close(epipe[1]);
380 76193d7c 2003-09-30 devnull 	epipe[1] = -1;
381 76193d7c 2003-09-30 devnull 	for(i=0; i<nslave; i++){
382 76193d7c 2003-09-30 devnull 		if(pid == eslave[i].pid)
383 76193d7c 2003-09-30 devnull 			continue;	/* don't kill myself */
384 76193d7c 2003-09-30 devnull 		postnote(PNPROC, eslave[i].pid, "die");
385 76193d7c 2003-09-30 devnull 	}
386 76193d7c 2003-09-30 devnull 	return 0;
387 76193d7c 2003-09-30 devnull }
388 76193d7c 2003-09-30 devnull 
389 76193d7c 2003-09-30 devnull static void
390 76193d7c 2003-09-30 devnull ekill(void)
391 76193d7c 2003-09-30 devnull {
392 76193d7c 2003-09-30 devnull 	enote(0, 0);
393 76193d7c 2003-09-30 devnull }
394 76193d7c 2003-09-30 devnull 
395 76193d7c 2003-09-30 devnull Mouse
396 76193d7c 2003-09-30 devnull emouse(void)
397 76193d7c 2003-09-30 devnull {
398 76193d7c 2003-09-30 devnull 	Mouse m;
399 76193d7c 2003-09-30 devnull 	Ebuf *eb;
400 76193d7c 2003-09-30 devnull 	static but[2];
401 76193d7c 2003-09-30 devnull 	int b;
402 76193d7c 2003-09-30 devnull 
403 76193d7c 2003-09-30 devnull 	if(Smouse < 0)
404 76193d7c 2003-09-30 devnull 		drawerror(display, "events: mouse not initialized");
405 76193d7c 2003-09-30 devnull 	eb = ebread(&eslave[Smouse]);
406 76193d7c 2003-09-30 devnull 	m.xy.x = atoi((char*)eb->buf+1+0*12);
407 76193d7c 2003-09-30 devnull 	m.xy.y = atoi((char*)eb->buf+1+1*12);
408 76193d7c 2003-09-30 devnull 	b = atoi((char*)eb->buf+1+2*12);
409 76193d7c 2003-09-30 devnull 	m.buttons = b&7;
410 76193d7c 2003-09-30 devnull 	m.msec = atoi((char*)eb->buf+1+3*12);
411 76193d7c 2003-09-30 devnull 	if (logfid)
412 76193d7c 2003-09-30 devnull 		fprint(logfid, "b: %d xy: %P\n", m.buttons, m.xy);
413 76193d7c 2003-09-30 devnull 	free(eb);
414 76193d7c 2003-09-30 devnull 	return m;
415 76193d7c 2003-09-30 devnull }
416 76193d7c 2003-09-30 devnull 
417 76193d7c 2003-09-30 devnull int
418 76193d7c 2003-09-30 devnull ekbd(void)
419 76193d7c 2003-09-30 devnull {
420 76193d7c 2003-09-30 devnull 	Ebuf *eb;
421 76193d7c 2003-09-30 devnull 	int c;
422 76193d7c 2003-09-30 devnull 
423 76193d7c 2003-09-30 devnull 	if(Skeyboard < 0)
424 76193d7c 2003-09-30 devnull 		drawerror(display, "events: keyboard not initialzed");
425 76193d7c 2003-09-30 devnull 	eb = ebread(&eslave[Skeyboard]);
426 76193d7c 2003-09-30 devnull 	c = eb->buf[0] + (eb->buf[1]<<8);
427 76193d7c 2003-09-30 devnull 	free(eb);
428 76193d7c 2003-09-30 devnull 	return c;
429 76193d7c 2003-09-30 devnull }
430 76193d7c 2003-09-30 devnull 
431 76193d7c 2003-09-30 devnull void
432 76193d7c 2003-09-30 devnull emoveto(Point pt)
433 76193d7c 2003-09-30 devnull {
434 76193d7c 2003-09-30 devnull 	char buf[2*12+2];
435 76193d7c 2003-09-30 devnull 	int n;
436 76193d7c 2003-09-30 devnull 
437 76193d7c 2003-09-30 devnull 	n = sprint(buf, "m%d %d", pt.x, pt.y);
438 76193d7c 2003-09-30 devnull 	write(mousefd, buf, n);
439 76193d7c 2003-09-30 devnull }
440 76193d7c 2003-09-30 devnull 
441 76193d7c 2003-09-30 devnull void
442 76193d7c 2003-09-30 devnull esetcursor(Cursor *c)
443 76193d7c 2003-09-30 devnull {
444 76193d7c 2003-09-30 devnull 	uchar curs[2*4+2*2*16];
445 76193d7c 2003-09-30 devnull 
446 76193d7c 2003-09-30 devnull 	if(c == 0)
447 76193d7c 2003-09-30 devnull 		write(cursorfd, curs, 0);
448 76193d7c 2003-09-30 devnull 	else{
449 76193d7c 2003-09-30 devnull 		BPLONG(curs+0*4, c->offset.x);
450 76193d7c 2003-09-30 devnull 		BPLONG(curs+1*4, c->offset.y);
451 76193d7c 2003-09-30 devnull 		memmove(curs+2*4, c->clr, 2*2*16);
452 76193d7c 2003-09-30 devnull 		write(cursorfd, curs, sizeof curs);
453 76193d7c 2003-09-30 devnull 	}
454 76193d7c 2003-09-30 devnull }
455 76193d7c 2003-09-30 devnull 
456 76193d7c 2003-09-30 devnull int
457 76193d7c 2003-09-30 devnull ereadmouse(Mouse *m)
458 76193d7c 2003-09-30 devnull {
459 76193d7c 2003-09-30 devnull 	int n;
460 76193d7c 2003-09-30 devnull 	char buf[128];
461 76193d7c 2003-09-30 devnull 
462 76193d7c 2003-09-30 devnull 	do{
463 76193d7c 2003-09-30 devnull 		n = read(mousefd, buf, sizeof(buf));
464 76193d7c 2003-09-30 devnull 		if(n < 0)	/* probably interrupted */
465 76193d7c 2003-09-30 devnull 			return -1;
466 76193d7c 2003-09-30 devnull 		n = eatomouse(m, buf, n);
467 76193d7c 2003-09-30 devnull 	}while(n == 0);
468 76193d7c 2003-09-30 devnull 	return n;
469 76193d7c 2003-09-30 devnull }
470 76193d7c 2003-09-30 devnull 
471 76193d7c 2003-09-30 devnull int
472 76193d7c 2003-09-30 devnull eatomouse(Mouse *m, char *buf, int n)
473 76193d7c 2003-09-30 devnull {
474 76193d7c 2003-09-30 devnull 	if(n != 1+4*12){
475 76193d7c 2003-09-30 devnull 		werrstr("atomouse: bad count");
476 76193d7c 2003-09-30 devnull 		return -1;
477 76193d7c 2003-09-30 devnull 	}
478 76193d7c 2003-09-30 devnull 
479 76193d7c 2003-09-30 devnull 	if(buf[0] == 'r')
480 76193d7c 2003-09-30 devnull 		eresized(1);
481 76193d7c 2003-09-30 devnull 	m->xy.x = atoi(buf+1+0*12);
482 76193d7c 2003-09-30 devnull 	m->xy.y = atoi(buf+1+1*12);
483 76193d7c 2003-09-30 devnull 	m->buttons = atoi(buf+1+2*12);
484 76193d7c 2003-09-30 devnull 	m->msec = atoi(buf+1+3*12);
485 76193d7c 2003-09-30 devnull 	return n;
486 76193d7c 2003-09-30 devnull }