1 #include <u.h>
2 #include <libc.h>
3 #include <draw.h>
4 #include <thread.h>
5 #include <cursor.h>
6 #include <mouse.h>
7 #include <keyboard.h>
8 #include <frame.h>
9 #include <fcall.h>
10 #include <plumb.h>
11 #include "dat.h"
12 #include "fns.h"
13 	/* for generating syms in mkfile only: */
14 	#include <bio.h>
15 	#include "edit.h"
16 
17 void	mousethread(void*);
18 void	keyboardthread(void*);
19 void	waitthread(void*);
20 void	xfidallocthread(void*);
21 void	newwindowthread(void*);
22 void plumbproc(void*);
23 
24 Reffont	**fontcache;
25 int		nfontcache;
26 char		wdir[512] = ".";
27 Reffont	*reffonts[2];
28 int		snarffd = -1;
29 int		mainpid;
30 int		swapscrollbuttons = FALSE;
31 
32 enum{
33 	NSnarf = 1000	/* less than 1024, I/O buffer size */
34 };
35 Rune	snarfrune[NSnarf+1];
36 
37 char		*fontnames[2] =
38 {
39 	"/lib/font/bit/lucidasans/euro.8.font",
40 	"/lib/font/bit/lucm/unicode.9.font",
41 };
42 
43 Command *command;
44 
45 void	shutdownthread(void*);
46 void	acmeerrorinit(void);
47 void	readfile(Column*, char*);
48 static int	shutdown(void*, char*);
49 
50 void
51 derror(Display *d, char *errorstr)
52 {
53 	USED(d);
54 	error(errorstr);
55 }
56 
57 void
58 threadmain(int argc, char *argv[])
59 {
60 	int i;
61 	char *p, *loadfile;
62 	Column *c;
63 	int ncol;
64 	Display *d;
65 
66 	rfork(RFENVG|RFNAMEG);
67 
68 	ncol = -1;
69 
70 	loadfile = nil;
71 	ARGBEGIN{
72 	case '$':
73 		dodollarsigns = TRUE;
74 		break;
75 	case 'D':
76 		{extern int _threaddebuglevel;
77 		_threaddebuglevel = ~0;
78 		}
79 		break;
80 	case 'a':
81 		globalautoindent = TRUE;
82 		break;
83 	case 'b':
84 		bartflag = TRUE;
85 		break;
86 	case 'c':
87 		p = ARGF();
88 		if(p == nil)
89 			goto Usage;
90 		ncol = atoi(p);
91 		if(ncol <= 0)
92 			goto Usage;
93 		break;
94 	case 'f':
95 		fontnames[0] = ARGF();
96 		if(fontnames[0] == nil)
97 			goto Usage;
98 		break;
99 	case 'F':
100 		fontnames[1] = ARGF();
101 		if(fontnames[1] == nil)
102 			goto Usage;
103 		break;
104 	case 'l':
105 		loadfile = ARGF();
106 		if(loadfile == nil)
107 			goto Usage;
108 		break;
109 	case 'r':
110 		swapscrollbuttons = TRUE;
111 		break;
112 	case 'W':
113 		winsize = ARGF();
114 		if(winsize == nil)
115 			goto Usage;
116 		break;
117 	default:
118 	Usage:
119 		fprint(2, "usage: acme -a -c ncol -f fontname -F fixedwidthfontname -l loadfile -W winsize\n");
120 		threadexitsall("usage");
121 	}ARGEND
122 
123 	fontnames[0] = estrdup(fontnames[0]);
124 	fontnames[1] = estrdup(fontnames[1]);
125 
126 	quotefmtinstall();
127 	cputype = getenv("cputype");
128 	objtype = getenv("objtype");
129 	home = getenv("HOME");
130 	p = getenv("tabstop");
131 	if(p != nil){
132 		maxtab = strtoul(p, nil, 0);
133 		free(p);
134 	}
135 	if(maxtab == 0)
136 		maxtab = 4; 
137 	if(loadfile)
138 		rowloadfonts(loadfile);
139 	putenv("font", fontnames[0]);
140 	snarffd = open("/dev/snarf", OREAD|OCEXEC);
141 /*
142 	if(cputype){
143 		sprint(buf, "/acme/bin/%s", cputype);
144 		bind(buf, "/bin", MBEFORE);
145 	}
146 	bind("/acme/bin", "/bin", MBEFORE);
147 */
148 	getwd(wdir, sizeof wdir);
149 
150 /*
151 	if(geninitdraw(nil, derror, fontnames[0], "acme", nil, Refnone) < 0){
152 		fprint(2, "acme: can't open display: %r\n");
153 		threadexitsall("geninitdraw");
154 	}
155 */
156 	if(initdraw(derror, fontnames[0], "acme") < 0){
157 		fprint(2, "acme: can't open display: %r\n");
158 		threadexitsall("initdraw");
159 	}
160 
161 	d = display;
162 	font = d->defaultfont;
163 //assert(font);
164 
165 	reffont.f = font;
166 	reffonts[0] = &reffont;
167 	incref(&reffont.ref);	/* one to hold up 'font' variable */
168 	incref(&reffont.ref);	/* one to hold up reffonts[0] */
169 	fontcache = emalloc(sizeof(Reffont*));
170 	nfontcache = 1;
171 	fontcache[0] = &reffont;
172 
173 	iconinit();
174 	timerinit();
175 	rxinit();
176 
177 	cwait = threadwaitchan();
178 	ccommand = chancreate(sizeof(Command**), 0);
179 	chansetname(ccommand, "ccommand");
180 	ckill = chancreate(sizeof(Rune*), 0);
181 	chansetname(ckill, "ckill");
182 	cxfidalloc = chancreate(sizeof(Xfid*), 0);
183 	chansetname(cxfidalloc, "cxfidalloc");
184 	cxfidfree = chancreate(sizeof(Xfid*), 0);
185 	chansetname(cxfidfree, "cxfidfree");
186 	cnewwindow = chancreate(sizeof(Channel*), 0);
187 	chansetname(cnewwindow, "cnewwindow");
188 	cerr = chancreate(sizeof(char*), 0);
189 	chansetname(cerr, "cerr");
190 	cedit = chancreate(sizeof(int), 0);
191 	chansetname(cedit, "cedit");
192 	cexit = chancreate(sizeof(int), 0);
193 	chansetname(cexit, "cexit");
194 	cwarn = chancreate(sizeof(void*), 1);
195 	chansetname(cwarn, "cwarn");
196 	if(cwait==nil || ccommand==nil || ckill==nil || cxfidalloc==nil || cxfidfree==nil || cerr==nil || cexit==nil || cwarn==nil){
197 		fprint(2, "acme: can't create initial channels: %r\n");
198 		threadexitsall("channels");
199 	}
200 
201 	mousectl = initmouse(nil, screen);
202 	if(mousectl == nil){
203 		fprint(2, "acme: can't initialize mouse: %r\n");
204 		threadexitsall("mouse");
205 	}
206 	mouse = &mousectl->m;
207 	keyboardctl = initkeyboard(nil);
208 	if(keyboardctl == nil){
209 		fprint(2, "acme: can't initialize keyboard: %r\n");
210 		threadexitsall("keyboard");
211 	}
212 	mainpid = getpid();
213 	startplumbing();
214 /*
215 	plumbeditfd = plumbopen("edit", OREAD|OCEXEC);
216 	if(plumbeditfd < 0)
217 		fprint(2, "acme: can't initialize plumber: %r\n");
218 	else{
219 		cplumb = chancreate(sizeof(Plumbmsg*), 0);
220 		threadcreate(plumbproc, nil, STACK);
221 	}
222 	plumbsendfd = plumbopen("send", OWRITE|OCEXEC);
223 */
224 
225 	fsysinit();
226 
227 	#define	WPERCOL	8
228 	disk = diskinit();
229 	if(!loadfile || !rowload(&row, loadfile, TRUE)){
230 		rowinit(&row, screen->clipr);
231 		if(ncol < 0){
232 			if(argc == 0)
233 				ncol = 2;
234 			else{
235 				ncol = (argc+(WPERCOL-1))/WPERCOL;
236 				if(ncol < 2)
237 					ncol = 2;
238 			}
239 		}
240 		if(ncol == 0)
241 			ncol = 2;
242 		for(i=0; i<ncol; i++){
243 			c = rowadd(&row, nil, -1);
244 			if(c==nil && i==0)
245 				error("initializing columns");
246 		}
247 		c = row.col[row.ncol-1];
248 		if(argc == 0)
249 			readfile(c, wdir);
250 		else
251 			for(i=0; i<argc; i++){
252 				p = utfrrune(argv[i], '/');
253 				if((p!=nil && strcmp(p, "/guide")==0) || i/WPERCOL>=row.ncol)
254 					readfile(c, argv[i]);
255 				else
256 					readfile(row.col[i/WPERCOL], argv[i]);
257 			}
258 	}
259 	flushimage(display, 1);
260 
261 	acmeerrorinit();
262 	threadcreate(keyboardthread, nil, STACK);
263 	threadcreate(mousethread, nil, STACK);
264 	threadcreate(waitthread, nil, STACK);
265 	threadcreate(xfidallocthread, nil, STACK);
266 	threadcreate(newwindowthread, nil, STACK);
267 /*	threadcreate(shutdownthread, nil, STACK); */
268 	threadnotify(shutdown, 1);
269 	recvul(cexit);
270 	killprocs();
271 	threadexitsall(nil);
272 }
273 
274 void
275 readfile(Column *c, char *s)
276 {
277 	Window *w;
278 	Rune rb[256];
279 	int nb, nr;
280 	Runestr rs;
281 
282 	w = coladd(c, nil, nil, -1);
283 	cvttorunes(s, strlen(s), rb, &nb, &nr, nil);
284 	rs = cleanrname(runestr(rb, nr));
285 	winsetname(w, rs.r, rs.nr);
286 	textload(&w->body, 0, s, 1);
287 	w->body.file->mod = FALSE;
288 	w->dirty = FALSE;
289 	winsettag(w);
290 	textscrdraw(&w->body);
291 	textsetselect(&w->tag, w->tag.file->b.nc, w->tag.file->b.nc);
292 }
293 
294 char *ignotes[] = {
295 	"sys: write on closed pipe",
296 	"sys: ttin",
297 	"sys: ttou",
298 	"sys: tstp",
299 	nil
300 };
301 
302 char *oknotes[] ={
303 	"delete",
304 	"hangup",
305 	"kill",
306 	"exit",
307 	nil
308 };
309 
310 int	dumping;
311 
312 static int
313 shutdown(void *v, char *msg)
314 {
315 	int i;
316 
317 	USED(v);
318 
319 	for(i=0; ignotes[i]; i++)
320 		if(strncmp(ignotes[i], msg, strlen(ignotes[i])) == 0)
321 			return 1;
322 	
323 	killprocs();
324 	if(!dumping && strcmp(msg, "kill")!=0 && strcmp(msg, "exit")!=0 && getpid()==mainpid){
325 		dumping = TRUE;
326 		rowdump(&row, nil);
327 	}
328 	for(i=0; oknotes[i]; i++)
329 		if(strncmp(oknotes[i], msg, strlen(oknotes[i])) == 0)
330 			threadexitsall(msg);
331 	print("acme: %s\n", msg);
332 	return 0;
333 }
334 
335 /*
336 void
337 shutdownthread(void *v)
338 {
339 	char *msg;
340 	Channel *c;
341 
342 	USED(v);
343 
344 	c = threadnotechan();
345 	while((msg = recvp(c)) != nil)
346 		shutdown(nil, msg);
347 }
348 */
349 
350 void
351 killprocs(void)
352 {
353 	Command *c;
354 
355 	fsysclose();
356 //	if(display)
357 //		flushimage(display, 1);
358 
359 	for(c=command; c; c=c->next)
360 		postnote(PNGROUP, c->pid, "hangup");
361 }
362 
363 static int errorfd;
364 int erroutfd;
365 
366 void
367 acmeerrorproc(void *v)
368 {
369 	char *buf;
370 	int n;
371 
372 	USED(v);
373 	threadsetname("acmeerrorproc");
374 	buf = emalloc(8192+1);
375 	while((n=read(errorfd, buf, 8192)) >= 0){
376 		buf[n] = '\0';
377 		sendp(cerr, estrdup(buf));
378 	}
379 }
380 
381 void
382 acmeerrorinit(void)
383 {
384 	int pfd[2];
385 
386 	if(pipe(pfd) < 0)
387 		error("can't create pipe");
388 #if 0
389 	sprint(acmeerrorfile, "/srv/acme.%s.%d", getuser(), mainpid);
390 	fd = create(acmeerrorfile, OWRITE, 0666);
391 	if(fd < 0){
392 		remove(acmeerrorfile);
393   		fd = create(acmeerrorfile, OWRITE, 0666);
394 		if(fd < 0)
395 			error("can't create acmeerror file");
396 	}
397 	sprint(buf, "%d", pfd[0]);
398 	write(fd, buf, strlen(buf));
399 	close(fd);
400 	/* reopen pfd[1] close on exec */
401 	sprint(buf, "/fd/%d", pfd[1]);
402 	errorfd = open(buf, OREAD|OCEXEC);
403 #endif
404 	fcntl(pfd[0], F_SETFD, FD_CLOEXEC);
405 	fcntl(pfd[1], F_SETFD, FD_CLOEXEC);
406 	erroutfd = pfd[0];
407 	errorfd = pfd[1];
408 	if(errorfd < 0)
409 		error("can't re-open acmeerror file");
410 	proccreate(acmeerrorproc, nil, STACK);
411 }
412 
413 /*
414 void
415 plumbproc(void *v)
416 {
417 	Plumbmsg *m;
418 
419 	USED(v);
420 	threadsetname("plumbproc");
421 	for(;;){
422 		m = threadplumbrecv(plumbeditfd);
423 		if(m == nil)
424 			threadexits(nil);
425 		sendp(cplumb, m);
426 	}
427 }
428 */
429 
430 void
431 keyboardthread(void *v)
432 {
433 	Rune r;
434 	Timer *timer;
435 	Text *t;
436 	enum { KTimer, KKey, NKALT };
437 	static Alt alts[NKALT+1];
438 
439 	USED(v);
440 	alts[KTimer].c = nil;
441 	alts[KTimer].v = nil;
442 	alts[KTimer].op = CHANNOP;
443 	alts[KKey].c = keyboardctl->c;
444 	alts[KKey].v = &r;
445 	alts[KKey].op = CHANRCV;
446 	alts[NKALT].op = CHANEND;
447 
448 	timer = nil;
449 	typetext = nil;
450 	threadsetname("keyboardthread");
451 	for(;;){
452 		switch(alt(alts)){
453 		case KTimer:
454 			timerstop(timer);
455 			t = typetext;
456 			if(t!=nil && t->what==Tag){
457 				winlock(t->w, 'K');
458 				wincommit(t->w, t);
459 				winunlock(t->w);
460 				flushimage(display, 1);
461 			}
462 			alts[KTimer].c = nil;
463 			alts[KTimer].op = CHANNOP;
464 			break;
465 		case KKey:
466 		casekeyboard:
467 			typetext = rowtype(&row, r, mouse->xy);
468 			t = typetext;
469 			if(t!=nil && t->col!=nil && !(r==Kdown || r==Kleft || r==Kright))	/* scrolling doesn't change activecol */
470 				activecol = t->col;
471 			if(t!=nil && t->w!=nil)
472 				t->w->body.file->curtext = &t->w->body;
473 			if(timer != nil)
474 				timercancel(timer);
475 			if(t!=nil && t->what==Tag) {
476 				timer = timerstart(500);
477 				alts[KTimer].c = timer->c;
478 				alts[KTimer].op = CHANRCV;
479 			}else{
480 				timer = nil;
481 				alts[KTimer].c = nil;
482 				alts[KTimer].op = CHANNOP;
483 			}
484 			if(nbrecv(keyboardctl->c, &r) > 0)
485 				goto casekeyboard;
486 			flushimage(display, 1);
487 			break;
488 		}
489 	}
490 }
491 
492 void
493 mousethread(void *v)
494 {
495 	Text *t, *argt;
496 	int but;
497 	uint q0, q1;
498 	Window *w;
499 	Plumbmsg *pm;
500 	Mouse m;
501 	char *act;
502 	enum { MResize, MMouse, MPlumb, MWarnings, NMALT };
503 	static Alt alts[NMALT+1];
504 
505 	USED(v);
506 	threadsetname("mousethread");
507 	alts[MResize].c = mousectl->resizec;
508 	alts[MResize].v = nil;
509 	alts[MResize].op = CHANRCV;
510 	alts[MMouse].c = mousectl->c;
511 	alts[MMouse].v = &mousectl->m;
512 	alts[MMouse].op = CHANRCV;
513 	alts[MPlumb].c = cplumb;
514 	alts[MPlumb].v = &pm;
515 	alts[MPlumb].op = CHANRCV;
516 	alts[MWarnings].c = cwarn;
517 	alts[MWarnings].v = nil;
518 	alts[MWarnings].op = CHANRCV;
519 	if(cplumb == nil)
520 		alts[MPlumb].op = CHANNOP;
521 	alts[NMALT].op = CHANEND;
522 	
523 	for(;;){
524 		qlock(&row.lk);
525 		flushwarnings();
526 		qunlock(&row.lk);
527 		flushimage(display, 1);
528 		switch(alt(alts)){
529 		case MResize:
530 			if(getwindow(display, Refnone) < 0)
531 				error("attach to window");
532 			draw(screen, screen->r, display->white, nil, ZP);
533 			scrlresize();
534 			rowresize(&row, screen->clipr);
535 			break;
536 		case MPlumb:
537 			if(strcmp(pm->type, "text") == 0){
538 				act = plumblookup(pm->attr, "action");
539 				if(act==nil || strcmp(act, "showfile")==0)
540 					plumblook(pm);
541 				else if(strcmp(act, "showdata")==0)
542 					plumbshow(pm);
543 			}
544 			plumbfree(pm);
545 			break;
546 		case MWarnings:
547 			break;
548 		case MMouse:
549 			/*
550 			 * Make a copy so decisions are consistent; mousectl changes
551 			 * underfoot.  Can't just receive into m because this introduces
552 			 * another race; see /sys/src/libdraw/mouse.c.
553 			 */
554 			m = mousectl->m;
555 			qlock(&row.lk);
556 			t = rowwhich(&row, m.xy);
557 			if(t!=mousetext && mousetext!=nil && mousetext->w!=nil){
558 				winlock(mousetext->w, 'M');
559 				mousetext->eq0 = ~0;
560 				wincommit(mousetext->w, mousetext);
561 				winunlock(mousetext->w);
562 			}
563 			mousetext = t;
564 			if(t == nil)
565 				goto Continue;
566 			w = t->w;
567 			if(t==nil || m.buttons==0)
568 				goto Continue;
569 			but = 0;
570 			if(m.buttons == 1)
571 				but = 1;
572 			else if(m.buttons == 2)
573 				but = 2;
574 			else if(m.buttons == 4)
575 				but = 3;
576 			barttext = t;
577 			if(t->what==Body && ptinrect(m.xy, t->scrollr)){
578 				if(but){
579 					if(swapscrollbuttons){
580 						if(but == 1)
581 							but = 3;
582 						else if(but == 3)
583 							but = 1;
584 					}
585 					winlock(w, 'M');
586 					t->eq0 = ~0;
587 					textscroll(t, but);
588 					winunlock(w);
589 				}
590 				goto Continue;
591 			}
592 			/* scroll buttons, wheels, etc. */
593 			if(t->what==Body && w != nil && (m.buttons & (8|16))){
594 				if(m.buttons & 8)
595 					but = Kscrolloneup;
596 				else
597 					but = Kscrollonedown;
598 				winlock(w, 'M');
599 				t->eq0 = ~0;
600 				texttype(t, but);
601 				winunlock(w);
602 				goto Continue;
603 			}
604 			if(ptinrect(m.xy, t->scrollr)){
605 				if(but){
606 					if(t->what == Columntag)
607 						rowdragcol(&row, t->col, but);
608 					else if(t->what == Tag){
609 						coldragwin(t->col, t->w, but);
610 						if(t->w)
611 							barttext = &t->w->body;
612 					}
613 					if(t->col)
614 						activecol = t->col;
615 				}
616 				goto Continue;
617 			}
618 			if(m.buttons){
619 				if(w)
620 					winlock(w, 'M');
621 				t->eq0 = ~0;
622 				if(w)
623 					wincommit(w, t);
624 				else
625 					textcommit(t, TRUE);
626 				if(m.buttons & 1){
627 					textselect(t);
628 					if(w)
629 						winsettag(w);
630 					argtext = t;
631 					seltext = t;
632 					if(t->col)
633 						activecol = t->col;	/* button 1 only */
634 					if(t->w!=nil && t==&t->w->body)
635 						activewin = t->w;
636 				}else if(m.buttons & 2){
637 					if(textselect2(t, &q0, &q1, &argt))
638 						execute(t, q0, q1, FALSE, argt);
639 				}else if(m.buttons & 4){
640 					if(textselect3(t, &q0, &q1))
641 						look3(t, q0, q1, FALSE);
642 				}
643 				if(w)
644 					winunlock(w);
645 				goto Continue;
646 			}
647     Continue:
648 			qunlock(&row.lk);
649 			break;
650 		}
651 	}
652 }
653 
654 /*
655  * There is a race between process exiting and our finding out it was ever created.
656  * This structure keeps a list of processes that have exited we haven't heard of.
657  */
658 typedef struct Pid Pid;
659 struct Pid
660 {
661 	int	pid;
662 	char	msg[ERRMAX];
663 	Pid	*next;
664 };
665 
666 void
667 waitthread(void *v)
668 {
669 	Waitmsg *w;
670 	Command *c, *lc;
671 	uint pid;
672 	int found, ncmd;
673 	Rune *cmd;
674 	char *err;
675 	Text *t;
676 	Pid *pids, *p, *lastp;
677 	enum { WErr, WKill, WWait, WCmd, NWALT };
678 	Alt alts[NWALT+1];
679 
680 	USED(v);
681 	threadsetname("waitthread");
682 	pids = nil;
683 	alts[WErr].c = cerr;
684 	alts[WErr].v = &err;
685 	alts[WErr].op = CHANRCV;
686 	alts[WKill].c = ckill;
687 	alts[WKill].v = &cmd;
688 	alts[WKill].op = CHANRCV;
689 	alts[WWait].c = cwait;
690 	alts[WWait].v = &w;
691 	alts[WWait].op = CHANRCV;
692 	alts[WCmd].c = ccommand;
693 	alts[WCmd].v = &c;
694 	alts[WCmd].op = CHANRCV;
695 	alts[NWALT].op = CHANEND;
696 
697 	command = nil;
698 	for(;;){
699 		switch(alt(alts)){
700 		case WErr:
701 			qlock(&row.lk);
702 			warning(nil, "%s", err);
703 			free(err);
704 			flushimage(display, 1);
705 			qunlock(&row.lk);
706 			break;
707 		case WKill:
708 			found = FALSE;
709 			ncmd = runestrlen(cmd);
710 			for(c=command; c; c=c->next){
711 				/* -1 for blank */
712 				if(runeeq(c->name, c->nname-1, cmd, ncmd) == TRUE){
713 					if(postnote(PNGROUP, c->pid, "kill") < 0)
714 						warning(nil, "kill %S: %r\n", cmd);
715 					found = TRUE;
716 				}
717 			}
718 			if(!found)
719 				warning(nil, "Kill: no process %S\n", cmd);
720 			free(cmd);
721 			break;
722 		case WWait:
723 			pid = w->pid;
724 			lc = nil;
725 			for(c=command; c; c=c->next){
726 				if(c->pid == pid){
727 					if(lc)
728 						lc->next = c->next;
729 					else
730 						command = c->next;
731 					break;
732 				}
733 				lc = c;
734 			}
735 			qlock(&row.lk);
736 			t = &row.tag;
737 			textcommit(t, TRUE);
738 			if(c == nil){
739 				/* helper processes use this exit status */
740 				if(strncmp(w->msg, "libthread", 9) != 0){
741 					p = emalloc(sizeof(Pid));
742 					p->pid = pid;
743 					strncpy(p->msg, w->msg, sizeof(p->msg));
744 					p->next = pids;
745 					pids = p;
746 				}
747 			}else{
748 				if(search(t, c->name, c->nname)){
749 					textdelete(t, t->q0, t->q1, TRUE);
750 					textsetselect(t, 0, 0);
751 				}
752 				if(w->msg[0])
753 					warning(c->md, "%.*S: exit %s\n", c->nname-1, c->name, w->msg);
754 				flushimage(display, 1);
755 			}
756 			qunlock(&row.lk);
757 			free(w);
758     Freecmd:
759 			if(c){
760 				if(c->iseditcmd)
761 					sendul(cedit, 0);
762 				free(c->text);
763 				free(c->name);
764 				fsysdelid(c->md);
765 				free(c);
766 			}
767 			break;
768 		case WCmd:
769 			/* has this command already exited? */
770 			lastp = nil;
771 			for(p=pids; p!=nil; p=p->next){
772 				if(p->pid == c->pid){
773 					if(p->msg[0])
774 						warning(c->md, "%s\n", p->msg);
775 					if(lastp == nil)
776 						pids = p->next;
777 					else
778 						lastp->next = p->next;
779 					free(p);
780 					goto Freecmd;
781 				}
782 				lastp = p;
783 			}
784 			c->next = command;
785 			command = c;
786 			qlock(&row.lk);
787 			t = &row.tag;
788 			textcommit(t, TRUE);
789 			textinsert(t, 0, c->name, c->nname, TRUE);
790 			textsetselect(t, 0, 0);
791 			flushimage(display, 1);
792 			qunlock(&row.lk);
793 			break;
794 		}
795 	}
796 }
797 
798 void
799 xfidallocthread(void *v)
800 {
801 	Xfid *xfree, *x;
802 	enum { Alloc, Free, N };
803 	static Alt alts[N+1];
804 
805 	USED(v);
806 	threadsetname("xfidallocthread");
807 	alts[Alloc].c = cxfidalloc;
808 	alts[Alloc].v = nil;
809 	alts[Alloc].op = CHANRCV;
810 	alts[Free].c = cxfidfree;
811 	alts[Free].v = &x;
812 	alts[Free].op = CHANRCV;
813 	alts[N].op = CHANEND;
814 
815 	xfree = nil;
816 	for(;;){
817 		switch(alt(alts)){
818 		case Alloc:
819 			x = xfree;
820 			if(x)
821 				xfree = x->next;
822 			else{
823 				x = emalloc(sizeof(Xfid));
824 				x->c = chancreate(sizeof(void(*)(Xfid*)), 0);
825 				chansetname(x->c, "xc%p", x->c);
826 				x->arg = x;
827 				threadcreate(xfidctl, x->arg, STACK);
828 			}
829 			sendp(cxfidalloc, x);
830 			break;
831 		case Free:
832 			x->next = xfree;
833 			xfree = x;
834 			break;
835 		}
836 	}
837 }
838 
839 /* this thread, in the main proc, allows fsysproc to get a window made without doing graphics */
840 void
841 newwindowthread(void *v)
842 {
843 	Window *w;
844 
845 	USED(v);
846 	threadsetname("newwindowthread");
847 
848 	for(;;){
849 		/* only fsysproc is talking to us, so synchronization is trivial */
850 		recvp(cnewwindow);
851 		w = makenewwindow(nil);
852 		winsettag(w);
853 		sendp(cnewwindow, w);
854 	}
855 }
856 
857 Reffont*
858 rfget(int fix, int save, int setfont, char *name)
859 {
860 	Reffont *r;
861 	Font *f;
862 	int i;
863 
864 	r = nil;
865 	if(name == nil){
866 		name = fontnames[fix];
867 		r = reffonts[fix];
868 	}
869 	if(r == nil){
870 		for(i=0; i<nfontcache; i++)
871 			if(strcmp(name, fontcache[i]->f->name) == 0){
872 				r = fontcache[i];
873 				goto Found;
874 			}
875 		f = openfont(display, name);
876 		if(f == nil){
877 			fprint(2, "can't open font file %s: %r\n", name);
878 			warning(nil, "can't open font file %s: %r\n", name);
879 			return nil;
880 		}
881 		r = emalloc(sizeof(Reffont));
882 		r->f = f;
883 		fontcache = erealloc(fontcache, (nfontcache+1)*sizeof(Reffont*));
884 		fontcache[nfontcache++] = r;
885 	}
886     Found:
887 	if(save){
888 		incref(&r->ref);
889 		if(reffonts[fix])
890 			rfclose(reffonts[fix]);
891 		reffonts[fix] = r;
892 		if(fontnames[fix] != name){
893 			free(fontnames[fix]);
894 			fontnames[fix] = estrdup(name);
895 		}
896 	}
897 	if(setfont){
898 		reffont.f = r->f;
899 		incref(&r->ref);
900 		rfclose(reffonts[0]);
901 		font = r->f;
902 		reffonts[0] = r;
903 		incref(&r->ref);
904 		iconinit();
905 	}
906 	incref(&r->ref);
907 	return r;
908 }
909 
910 void
911 rfclose(Reffont *r)
912 {
913 	int i;
914 
915 	if(decref(&r->ref) == 0){
916 		for(i=0; i<nfontcache; i++)
917 			if(r == fontcache[i])
918 				break;
919 		if(i >= nfontcache)
920 			warning(nil, "internal error: can't find font in cache\n");
921 		else{
922 			nfontcache--;
923 			memmove(fontcache+i, fontcache+i+1, (nfontcache-i)*sizeof(Reffont*));
924 		}
925 		freefont(r->f);
926 		free(r);
927 	}
928 }
929 
930 Cursor boxcursor = {
931 	{-7, -7},
932 	{0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
933 	 0xFF, 0xFF, 0xF8, 0x1F, 0xF8, 0x1F, 0xF8, 0x1F,
934 	 0xF8, 0x1F, 0xF8, 0x1F, 0xF8, 0x1F, 0xFF, 0xFF,
935 	 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF},
936 	{0x00, 0x00, 0x7F, 0xFE, 0x7F, 0xFE, 0x7F, 0xFE,
937 	 0x70, 0x0E, 0x70, 0x0E, 0x70, 0x0E, 0x70, 0x0E,
938 	 0x70, 0x0E, 0x70, 0x0E, 0x70, 0x0E, 0x70, 0x0E,
939 	 0x7F, 0xFE, 0x7F, 0xFE, 0x7F, 0xFE, 0x00, 0x00}
940 };
941 
942 void
943 iconinit(void)
944 {
945 	Rectangle r;
946 	Image *tmp;
947 
948 	/* Blue */
949 	tagcols[BACK] = allocimagemix(display, DPalebluegreen, DWhite);
950 	tagcols[HIGH] = allocimage(display, Rect(0,0,1,1), screen->chan, 1, DPalegreygreen);
951 	tagcols[BORD] = allocimage(display, Rect(0,0,1,1), screen->chan, 1, DPurpleblue);
952 	tagcols[TEXT] = display->black;
953 	tagcols[HTEXT] = display->black;
954 
955 	/* Yellow */
956 	textcols[BACK] = allocimagemix(display, DPaleyellow, DWhite);
957 	textcols[HIGH] = allocimage(display, Rect(0,0,1,1), screen->chan, 1, DDarkyellow);
958 	textcols[BORD] = allocimage(display, Rect(0,0,1,1), screen->chan, 1, DYellowgreen);
959 	textcols[TEXT] = display->black;
960 	textcols[HTEXT] = display->black;
961 
962 	if(button){
963 		freeimage(button);
964 		freeimage(modbutton);
965 		freeimage(colbutton);
966 	}
967 
968 	r = Rect(0, 0, Scrollwid+2, font->height+1);
969 	button = allocimage(display, r, screen->chan, 0, DNofill);
970 	draw(button, r, tagcols[BACK], nil, r.min);
971 	r.max.x -= 2;
972 	border(button, r, 2, tagcols[BORD], ZP);
973 
974 	r = button->r;
975 	modbutton = allocimage(display, r, screen->chan, 0, DNofill);
976 	draw(modbutton, r, tagcols[BACK], nil, r.min);
977 	r.max.x -= 2;
978 	border(modbutton, r, 2, tagcols[BORD], ZP);
979 	r = insetrect(r, 2);
980 	tmp = allocimage(display, Rect(0,0,1,1), screen->chan, 1, DMedblue);
981 	draw(modbutton, r, tmp, nil, ZP);
982 	freeimage(tmp);
983 
984 	r = button->r;
985 	colbutton = allocimage(display, r, screen->chan, 0, DPurpleblue);
986 
987 	but2col = allocimage(display, r, screen->chan, 1, 0xAA0000FF);
988 	but3col = allocimage(display, r, screen->chan, 1, 0x006600FF);
989 }
990 
991 /*
992  * /dev/snarf updates when the file is closed, so we must open our own
993  * fd here rather than use snarffd
994  */
995 
996 /* rio truncates larges snarf buffers, so this avoids using the
997  * service if the string is huge */
998 
999 #define MAXSNARF 100*1024
1000 
1001 void
1002 acmeputsnarf(void)
1003 {
1004 	int i, n;
1005 	Fmt f;
1006 	char *s;
1007 
1008 	if(snarfbuf.nc==0)
1009 		return;
1010 	if(snarfbuf.nc > MAXSNARF)
1011 		return;
1012 
1013 	fmtstrinit(&f);
1014 	for(i=0; i<snarfbuf.nc; i+=n){
1015 		n = snarfbuf.nc-i;
1016 		if(n >= NSnarf)
1017 			n = NSnarf;
1018 		bufread(&snarfbuf, i, snarfrune, n);
1019 		if(fmtprint(&f, "%.*S", n, snarfrune) < 0)
1020 			break;
1021 	}
1022 	s = fmtstrflush(&f);
1023 	if(s && s[0])
1024 		putsnarf(s);
1025 	free(s);
1026 }
1027 
1028 void
1029 acmegetsnarf(void)
1030 {
1031 	char *s;
1032 	int nb, nr, nulls, len;
1033 	Rune *r;
1034 
1035 	s = getsnarf();
1036 	if(s == nil || s[0]==0){
1037 		free(s);
1038 		return;
1039 	}
1040 
1041 	len = strlen(s);
1042 	r = runemalloc(len+1);
1043 	cvttorunes(s, len, r, &nb, &nr, &nulls);
1044 	bufreset(&snarfbuf);
1045 	bufinsert(&snarfbuf, 0, r, nr);
1046 	free(r);
1047 	free(s);
1048 }