xref: /plan9/sys/src/cmd/acme/exec.c (revision f9e1cf08d3be51592e03e639fc848a68dc31a55e) 
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 
14 Buffer	snarfbuf;
15 
16 /*
17  * These functions get called as:
18  *
19  *	fn(et, t, argt, flag1, flag1, flag2, s, n);
20  *
21  * Where the arguments are:
22  *
23  *	et: the Text* in which the executing event (click) occurred
24  *	t: the Text* containing the current selection (Edit, Cut, Snarf, Paste)
25  *	argt: the Text* containing the argument for a 2-1 click.
26  *	e->flag1: from Exectab entry
27  * 	e->flag2: from Exectab entry
28  *	s: the command line remainder (e.g., "x" if executing "Dump x")
29  *	n: length of s  (s is *not* NUL-terminated)
30  */
31 
32 void	del(Text*, Text*, Text*, int, int, Rune*, int);
33 void	delcol(Text*, Text*, Text*, int, int, Rune*, int);
34 void	dump(Text*, Text*, Text*, int, int, Rune*, int);
35 void	edit(Text*, Text*, Text*, int, int, Rune*, int);
36 void	exit(Text*, Text*, Text*, int, int, Rune*, int);
37 void	fontx(Text*, Text*, Text*, int, int, Rune*, int);
38 void	get(Text*, Text*, Text*, int, int, Rune*, int);
39 void	id(Text*, Text*, Text*, int, int, Rune*, int);
40 void	incl(Text*, Text*, Text*, int, int, Rune*, int);
41 void	indent(Text*, Text*, Text*, int, int, Rune*, int);
42 void	kill(Text*, Text*, Text*, int, int, Rune*, int);
43 void	local(Text*, Text*, Text*, int, int, Rune*, int);
44 void	look(Text*, Text*, Text*, int, int, Rune*, int);
45 void	newcol(Text*, Text*, Text*, int, int, Rune*, int);
46 void	paste(Text*, Text*, Text*, int, int, Rune*, int);
47 void	put(Text*, Text*, Text*, int, int, Rune*, int);
48 void	putall(Text*, Text*, Text*, int, int, Rune*, int);
49 void	sendx(Text*, Text*, Text*, int, int, Rune*, int);
50 void	sort(Text*, Text*, Text*, int, int, Rune*, int);
51 void	tab(Text*, Text*, Text*, int, int, Rune*, int);
52 void	zeroxx(Text*, Text*, Text*, int, int, Rune*, int);
53 
54 typedef struct Exectab Exectab;
55 struct Exectab
56 {
57 	Rune	*name;
58 	void	(*fn)(Text*, Text*, Text*, int, int, Rune*, int);
59 	int		mark;
60 	int		flag1;
61 	int		flag2;
62 };
63 
64 Exectab exectab[] = {
65 	{ L"Cut",		cut,		TRUE,	TRUE,	TRUE	},
66 	{ L"Del",		del,		FALSE,	FALSE,	XXX		},
67 	{ L"Delcol",	delcol,	FALSE,	XXX,		XXX		},
68 	{ L"Delete",	del,		FALSE,	TRUE,	XXX		},
69 	{ L"Dump",	dump,	FALSE,	TRUE,	XXX		},
70 	{ L"Edit",		edit,		FALSE,	XXX,		XXX		},
71 	{ L"Exit",		exit,		FALSE,	XXX,		XXX		},
72 	{ L"Font",		fontx,	FALSE,	XXX,		XXX		},
73 	{ L"Get",		get,		FALSE,	TRUE,	XXX		},
74 	{ L"ID",		id,		FALSE,	XXX,		XXX		},
75 	{ L"Incl",		incl,		FALSE,	XXX,		XXX		},
76 	{ L"Indent",	indent,	FALSE,	XXX,		XXX		},
77 	{ L"Kill",		kill,		FALSE,	XXX,		XXX		},
78 	{ L"Load",		dump,	FALSE,	FALSE,	XXX		},
79 	{ L"Local",		local,	FALSE,	XXX,		XXX		},
80 	{ L"Look",		look,		FALSE,	XXX,		XXX		},
81 	{ L"New",		new,		FALSE,	XXX,		XXX		},
82 	{ L"Newcol",	newcol,	FALSE,	XXX,		XXX		},
83 	{ L"Paste",		paste,	TRUE,	TRUE,	XXX		},
84 	{ L"Put",		put,		FALSE,	XXX,		XXX		},
85 	{ L"Putall",		putall,	FALSE,	XXX,		XXX		},
86 	{ L"Redo",		undo,	FALSE,	FALSE,	XXX		},
87 	{ L"Send",		sendx,	TRUE,	XXX,		XXX		},
88 	{ L"Snarf",		cut,		FALSE,	TRUE,	FALSE	},
89 	{ L"Sort",		sort,		FALSE,	XXX,		XXX		},
90 	{ L"Tab",		tab,		FALSE,	XXX,		XXX		},
91 	{ L"Undo",		undo,	FALSE,	TRUE,	XXX		},
92 	{ L"Zerox",	zeroxx,	FALSE,	XXX,		XXX		},
93 	{ nil, 			nil,		0,		0,		0		},
94 };
95 
96 Exectab*
97 lookup(Rune *r, int n)
98 {
99 	Exectab *e;
100 	int nr;
101 
102 	r = skipbl(r, n, &n);
103 	if(n == 0)
104 		return nil;
105 	findbl(r, n, &nr);
106 	nr = n-nr;
107 	for(e=exectab; e->name; e++)
108 		if(runeeq(r, nr, e->name, runestrlen(e->name)) == TRUE)
109 			return e;
110 	return nil;
111 }
112 
113 int
114 isexecc(int c)
115 {
116 	if(isfilec(c))
117 		return 1;
118 	return c=='<' || c=='|' || c=='>';
119 }
120 
121 void
122 execute(Text *t, uint aq0, uint aq1, int external, Text *argt)
123 {
124 	uint q0, q1;
125 	Rune *r, *s;
126 	char *b, *a, *aa;
127 	Exectab *e;
128 	int c, n, f;
129 	Runestr dir;
130 
131 	q0 = aq0;
132 	q1 = aq1;
133 	if(q1 == q0){	/* expand to find word (actually file name) */
134 		/* if in selection, choose selection */
135 		if(t->q1>t->q0 && t->q0<=q0 && q0<=t->q1){
136 			q0 = t->q0;
137 			q1 = t->q1;
138 		}else{
139 			while(q1<t->file->nc && isexecc(c=textreadc(t, q1)) && c!=':')
140 				q1++;
141 			while(q0>0 && isexecc(c=textreadc(t, q0-1)) && c!=':')
142 				q0--;
143 			if(q1 == q0)
144 				return;
145 		}
146 	}
147 	r = runemalloc(q1-q0);
148 	bufread(t->file, q0, r, q1-q0);
149 	e = lookup(r, q1-q0);
150 	if(!external && t->w!=nil && t->w->nopen[QWevent]>0){
151 		f = 0;
152 		if(e)
153 			f |= 1;
154 		if(q0!=aq0 || q1!=aq1){
155 			bufread(t->file, aq0, r, aq1-aq0);
156 			f |= 2;
157 		}
158 		aa = getbytearg(argt, TRUE, TRUE, &a);
159 		if(a){
160 			if(strlen(a) > EVENTSIZE){	/* too big; too bad */
161 				free(aa);
162 				free(a);
163 				warning(nil, "`argument string too long\n");
164 				return;
165 			}
166 			f |= 8;
167 		}
168 		c = 'x';
169 		if(t->what == Body)
170 			c = 'X';
171 		n = aq1-aq0;
172 		if(n <= EVENTSIZE)
173 			winevent(t->w, "%c%d %d %d %d %.*S\n", c, aq0, aq1, f, n, n, r);
174 		else
175 			winevent(t->w, "%c%d %d %d 0 \n", c, aq0, aq1, f, n);
176 		if(q0!=aq0 || q1!=aq1){
177 			n = q1-q0;
178 			bufread(t->file, q0, r, n);
179 			if(n <= EVENTSIZE)
180 				winevent(t->w, "%c%d %d 0 %d %.*S\n", c, q0, q1, n, n, r);
181 			else
182 				winevent(t->w, "%c%d %d 0 0 \n", c, q0, q1, n);
183 		}
184 		if(a){
185 			winevent(t->w, "%c0 0 0 %d %s\n", c, utflen(a), a);
186 			if(aa)
187 				winevent(t->w, "%c0 0 0 %d %s\n", c, utflen(aa), aa);
188 			else
189 				winevent(t->w, "%c0 0 0 0 \n", c);
190 		}
191 		free(r);
192 		free(aa);
193 		free(a);
194 		return;
195 	}
196 	if(e){
197 		if(e->mark && seltext!=nil)
198 		if(seltext->what == Body){
199 			seq++;
200 			filemark(seltext->w->body.file);
201 		}
202 		s = skipbl(r, q1-q0, &n);
203 		s = findbl(s, n, &n);
204 		s = skipbl(s, n, &n);
205 		(*e->fn)(t, seltext, argt, e->flag1, e->flag2, s, n);
206 		free(r);
207 		return;
208 	}
209 
210 	b = runetobyte(r, q1-q0);
211 	free(r);
212 	dir = dirname(t, nil, 0);
213 	if(dir.nr==1 && dir.r[0]=='.'){	/* sigh */
214 		free(dir.r);
215 		dir.r = nil;
216 		dir.nr = 0;
217 	}
218 	aa = getbytearg(argt, TRUE, TRUE, &a);
219 	if(t->w)
220 		incref(t->w);
221 	run(t->w, b, dir.r, dir.nr, TRUE, aa, a, FALSE);
222 }
223 
224 char*
225 printarg(Text *argt, uint q0, uint q1)
226 {
227 	char *buf;
228 
229 	if(argt->what!=Body || argt->file->name==nil)
230 		return nil;
231 	buf = emalloc(argt->file->nname+32);
232 	if(q0 == q1)
233 		sprint(buf, "%.*S:#%d", argt->file->nname, argt->file->name, q0);
234 	else
235 		sprint(buf, "%.*S:#%d,#%d", argt->file->nname, argt->file->name, q0, q1);
236 	return buf;
237 }
238 
239 char*
240 getarg(Text *argt, int doaddr, int dofile, Rune **rp, int *nrp)
241 {
242 	int n;
243 	Expand e;
244 	char *a;
245 
246 	*rp = nil;
247 	*nrp = 0;
248 	if(argt == nil)
249 		return nil;
250 	a = nil;
251 	textcommit(argt, TRUE);
252 	if(expand(argt, argt->q0, argt->q1, &e)){
253 		free(e.bname);
254 		if(e.nname && dofile){
255 			e.name = runerealloc(e.name, e.nname+1);
256 			if(doaddr)
257 				a = printarg(argt, e.q0, e.q1);
258 			*rp = e.name;
259 			*nrp = e.nname;
260 			return a;
261 		}
262 		free(e.name);
263 	}else{
264 		e.q0 = argt->q0;
265 		e.q1 = argt->q1;
266 	}
267 	n = e.q1 - e.q0;
268 	*rp = runemalloc(n+1);
269 	bufread(argt->file, e.q0, *rp, n);
270 	if(doaddr)
271 		a = printarg(argt, e.q0, e.q1);
272 	*nrp = n;
273 	return a;
274 }
275 
276 char*
277 getbytearg(Text *argt, int doaddr, int dofile, char **bp)
278 {
279 	Rune *r;
280 	int n;
281 	char *aa;
282 
283 	*bp = nil;
284 	aa = getarg(argt, doaddr, dofile, &r, &n);
285 	if(r == nil)
286 		return nil;
287 	*bp = runetobyte(r, n);
288 	free(r);
289 	return aa;
290 }
291 
292 void
293 newcol(Text *et, Text*, Text*, int, int, Rune*, int)
294 {
295 	Column *c;
296 
297 	c = rowadd(et->row, nil, -1);
298 	if(c)
299 		winsettag(coladd(c, nil, nil, -1));
300 }
301 
302 void
303 delcol(Text *et, Text*, Text*, int, int, Rune*, int)
304 {
305 	int i;
306 	Column *c;
307 	Window *w;
308 
309 	c = et->col;
310 	if(c==nil || colclean(c)==0)
311 		return;
312 	for(i=0; i<c->nw; i++){
313 		w = c->w[i];
314 		if(w->nopen[QWevent]+w->nopen[QWaddr]+w->nopen[QWdata]+w->nopen[QWxdata] > 0){
315 			warning(nil, "can't delete column; %.*S is running an external command\n", w->body.file->nname, w->body.file->name);
316 			return;
317 		}
318 	}
319 	rowclose(et->col->row, et->col, TRUE);
320 }
321 
322 void
323 del(Text *et, Text*, Text*, int flag1, int, Rune*, int)
324 {
325 	if(et->col==nil || et->w == nil)
326 		return;
327 	if(flag1 || et->w->body.file->ntext>1 || winclean(et->w, FALSE))
328 		colclose(et->col, et->w, TRUE);
329 }
330 
331 void
332 sort(Text *et, Text*, Text*, int, int, Rune*, int)
333 {
334 	if(et->col)
335 		colsort(et->col);
336 }
337 
338 uint
339 seqof(Window *w, int isundo)
340 {
341 	/* if it's undo, see who changed with us */
342 	if(isundo)
343 		return w->body.file->seq;
344 	/* if it's redo, see who we'll be sync'ed up with */
345 	return fileredoseq(w->body.file);
346 }
347 
348 void
349 undo(Text *et, Text*, Text*, int flag1, int, Rune*, int)
350 {
351 	int i, j;
352 	Column *c;
353 	Window *w;
354 	uint seq;
355 
356 	if(et==nil || et->w== nil)
357 		return;
358 	seq = seqof(et->w, flag1);
359 	if(seq == 0){
360 		/* nothing to undo */
361 		return;
362 	}
363 	/*
364 	 * Undo the executing window first. Its display will update. other windows
365 	 * in the same file will not call show() and jump to a different location in the file.
366 	 * Simultaneous changes to other files will be chaotic, however.
367 	 */
368 	winundo(et->w, flag1);
369 	for(i=0; i<row.ncol; i++){
370 		c = row.col[i];
371 		for(j=0; j<c->nw; j++){
372 			w = c->w[j];
373 			if(w == et->w)
374 				continue;
375 			if(seqof(w, flag1) == seq)
376 				winundo(w, flag1);
377 		}
378 	}
379 }
380 
381 char*
382 getname(Text *t, Text *argt, Rune *arg, int narg, int isput)
383 {
384 	char *s;
385 	Rune *r;
386 	int i, n, promote;
387 	Runestr dir;
388 
389 	getarg(argt, FALSE, TRUE, &r, &n);
390 	promote = FALSE;
391 	if(r == nil)
392 		promote = TRUE;
393 	else if(isput){
394 		/* if are doing a Put, want to synthesize name even for non-existent file */
395 		/* best guess is that file name doesn't contain a slash */
396 		promote = TRUE;
397 		for(i=0; i<n; i++)
398 			if(r[i] == '/'){
399 				promote = FALSE;
400 				break;
401 			}
402 		if(promote){
403 			t = argt;
404 			arg = r;
405 			narg = n;
406 		}
407 	}
408 	if(promote){
409 		n = narg;
410 		if(n <= 0){
411 			s = runetobyte(t->file->name, t->file->nname);
412 			return s;
413 		}
414 		/* prefix with directory name if necessary */
415 		dir.r = nil;
416 		dir.nr = 0;
417 		if(n>0 && arg[0]!='/'){
418 			dir = dirname(t, nil, 0);
419 			if(dir.nr==1 && dir.r[0]=='.'){	/* sigh */
420 				free(dir.r);
421 				dir.r = nil;
422 				dir.nr = 0;
423 			}
424 		}
425 		if(dir.r){
426 			r = runemalloc(dir.nr+n+1);
427 			runemove(r, dir.r, dir.nr);
428 			free(dir.r);
429 			if(dir.nr>0 && r[dir.nr]!='/' && n>0 && arg[0]!='/')
430 				r[dir.nr++] = '/';
431 			runemove(r+dir.nr, arg, n);
432 			n += dir.nr;
433 		}else{
434 			r = runemalloc(n+1);
435 			runemove(r, arg, n);
436 		}
437 	}
438 	s = runetobyte(r, n);
439 	free(r);
440 	if(strlen(s) == 0){
441 		free(s);
442 		s = nil;
443 	}
444 	return s;
445 }
446 
447 void
448 zeroxx(Text *et, Text *t, Text*, int, int, Rune*, int)
449 {
450 	Window *nw;
451 	int c, locked;
452 
453 	locked = FALSE;
454 	if(t!=nil && t->w!=nil && t->w!=et->w){
455 		locked = TRUE;
456 		c = 'M';
457 		if(et->w)
458 			c = et->w->owner;
459 		winlock(t->w, c);
460 	}
461 	if(t == nil)
462 		t = et;
463 	if(t==nil || t->w==nil)
464 		return;
465 	t = &t->w->body;
466 	if(t->w->isdir)
467 		warning(nil, "%.*S is a directory; Zerox illegal\n", t->file->nname, t->file->name);
468 	else{
469 		nw = coladd(t->w->col, nil, t->w, -1);
470 		/* ugly: fix locks so w->unlock works */
471 		winlock1(nw, t->w->owner);
472 	}
473 	if(locked)
474 		winunlock(t->w);
475 }
476 
477 void
478 get(Text *et, Text *t, Text *argt, int flag1, int, Rune *arg, int narg)
479 {
480 	char *name;
481 	Rune *r;
482 	int i, n, dirty, samename, isdir;
483 	Window *w;
484 	Text *u;
485 	Dir *d;
486 
487 	if(flag1)
488 		if(et==nil || et->w==nil)
489 			return;
490 	if(!et->w->isdir && (et->w->body.file->nc>0 && !winclean(et->w, TRUE)))
491 		return;
492 	w = et->w;
493 	t = &w->body;
494 	name = getname(t, argt, arg, narg, FALSE);
495 	if(name == nil){
496 		warning(nil, "no file name\n");
497 		return;
498 	}
499 	if(t->file->ntext>1){
500 		d = dirstat(name);
501 		isdir = (d!=nil && (d->qid.type & QTDIR));
502 		free(d);
503 		if(isdir){
504 			warning(nil, "%s is a directory; can't read with multiple windows on it\n", name);
505 			return;
506 		}
507 	}
508 	r = bytetorune(name, &n);
509 	for(i=0; i<t->file->ntext; i++){
510 		u = t->file->text[i];
511 		/* second and subsequent calls with zero an already empty buffer, but OK */
512 		textreset(u);
513 		windirfree(u->w);
514 	}
515 	samename = runeeq(r, n, t->file->name, t->file->nname);
516 	textload(t, 0, name, samename);
517 	if(samename){
518 		t->file->mod = FALSE;
519 		dirty = FALSE;
520 	}else{
521 		t->file->mod = TRUE;
522 		dirty = TRUE;
523 	}
524 	for(i=0; i<t->file->ntext; i++)
525 		t->file->text[i]->w->dirty = dirty;
526 	free(name);
527 	free(r);
528 	winsettag(w);
529 	t->file->unread = FALSE;
530 	for(i=0; i<t->file->ntext; i++){
531 		u = t->file->text[i];
532 		textsetselect(&u->w->tag, u->w->tag.file->nc, u->w->tag.file->nc);
533 		textscrdraw(u);
534 	}
535 }
536 
537 void
538 putfile(File *f, int q0, int q1, Rune *namer, int nname)
539 {
540 	uint n, m;
541 	Rune *r;
542 	char *s, *name;
543 	int i, fd, q;
544 	Dir *d, *d1;
545 	Window *w;
546 	int isapp;
547 
548 	w = f->curtext->w;
549 	name = runetobyte(namer, nname);
550 	d = dirstat(name);
551 	if(d!=nil && runeeq(namer, nname, f->name, f->nname)){
552 		/* f->mtime+1 because when talking over NFS it's often off by a second */
553 		if(f->dev!=d->dev || f->qidpath!=d->qid.path || f->mtime+1<d->mtime){
554 			f->dev = d->dev;
555 			f->qidpath = d->qid.path;
556 			f->mtime = d->mtime;
557 			if(f->unread)
558 				warning(nil, "%s not written; file already exists\n", name);
559 			else
560 				warning(nil, "%s modified%s%s since last read\n", name, d->muid[0]?" by ":"", d->muid);
561 			goto Rescue1;
562 		}
563 	}
564 	fd = create(name, OWRITE, 0666);
565 	if(fd < 0){
566 		warning(nil, "can't create file %s: %r\n", name);
567 		goto Rescue1;
568 	}
569 	r = fbufalloc();
570 	s = fbufalloc();
571 	free(d);
572 	d = dirfstat(fd);
573 	isapp = (d!=nil && d->length>0 && (d->qid.type&QTAPPEND));
574 	if(isapp){
575 		warning(nil, "%s not written; file is append only\n", name);
576 		goto Rescue2;
577 	}
578 
579 	for(q=q0; q<q1; q+=n){
580 		n = q1 - q;
581 		if(n > BUFSIZE/UTFmax)
582 			n = BUFSIZE/UTFmax;
583 		bufread(f, q, r, n);
584 		m = snprint(s, BUFSIZE+1, "%.*S", n, r);
585 		if(write(fd, s, m) != m){
586 			warning(nil, "can't write file %s: %r\n", name);
587 			goto Rescue2;
588 		}
589 	}
590 	if(runeeq(namer, nname, f->name, f->nname)){
591 		if(q0!=0 || q1!=f->nc){
592 			f->mod = TRUE;
593 			w->dirty = TRUE;
594 			f->unread = TRUE;
595 		}else{
596 			d1 = dirfstat(fd);
597 			if(d1 != nil){
598 				free(d);
599 				d = d1;
600 			}
601 			f->qidpath = d->qid.path;
602 			f->dev = d->dev;
603 			f->mtime = d->mtime;
604 			f->mod = FALSE;
605 			w->dirty = FALSE;
606 			f->unread = FALSE;
607 		}
608 		for(i=0; i<f->ntext; i++){
609 			f->text[i]->w->putseq = f->seq;
610 			f->text[i]->w->dirty = w->dirty;
611 		}
612 	}
613 	fbuffree(s);
614 	fbuffree(r);
615 	free(d);
616 	free(namer);
617 	free(name);
618 	close(fd);
619 	winsettag(w);
620 	return;
621 
622     Rescue2:
623 	fbuffree(s);
624 	fbuffree(r);
625 	close(fd);
626 	/* fall through */
627 
628     Rescue1:
629 	free(d);
630 	free(namer);
631 	free(name);
632 }
633 
634 void
635 put(Text *et, Text*, Text *argt, int, int, Rune *arg, int narg)
636 {
637 	int nname;
638 	Rune  *namer;
639 	Window *w;
640 	File *f;
641 	char *name;
642 
643 	if(et==nil || et->w==nil || et->w->isdir)
644 		return;
645 	w = et->w;
646 	f = w->body.file;
647 	name = getname(&w->body, argt, arg, narg, TRUE);
648 	if(name == nil){
649 		warning(nil, "no file name\n");
650 		return;
651 	}
652 	namer = bytetorune(name, &nname);
653 	putfile(f, 0, f->nc, namer, nname);
654 	free(name);
655 }
656 
657 void
658 dump(Text *, Text *, Text *argt, int isdump, int, Rune *arg, int narg)
659 {
660 	char *name;
661 
662 	if(narg)
663 		name = runetobyte(arg, narg);
664 	else
665 		getbytearg(argt, FALSE, TRUE, &name);
666 	if(isdump)
667 		rowdump(&row, name);
668 	else
669 		rowload(&row, name, FALSE);
670 	free(name);
671 }
672 
673 void
674 cut(Text *et, Text *t, Text*, int dosnarf, int docut, Rune*, int)
675 {
676 	uint q0, q1, n, locked, c;
677 	Rune *r;
678 
679 	/*
680 	 * if not executing a mouse chord (et != t) and snarfing (dosnarf)
681 	 * and executed Cut or Snarf in window tag (et->w != nil),
682 	 * then use the window body selection or the tag selection
683 	 * or do nothing at all.
684 	 */
685 	if(et!=t && dosnarf && et->w!=nil){
686 		if(et->w->body.q1>et->w->body.q0){
687 			t = &et->w->body;
688 			if(docut)
689 				filemark(t->file);	/* seq has been incremented by execute */
690 		}else if(et->w->tag.q1>et->w->tag.q0)
691 			t = &et->w->tag;
692 		else
693 			t = nil;
694 	}
695 	if(t == nil)	/* no selection */
696 		return;
697 
698 	locked = FALSE;
699 	if(t->w!=nil && et->w!=t->w){
700 		locked = TRUE;
701 		c = 'M';
702 		if(et->w)
703 			c = et->w->owner;
704 		winlock(t->w, c);
705 	}
706 	if(t->q0 == t->q1){
707 		if(locked)
708 			winunlock(t->w);
709 		return;
710 	}
711 	if(dosnarf){
712 		q0 = t->q0;
713 		q1 = t->q1;
714 		bufdelete(&snarfbuf, 0, snarfbuf.nc);
715 		r = fbufalloc();
716 		while(q0 < q1){
717 			n = q1 - q0;
718 			if(n > RBUFSIZE)
719 				n = RBUFSIZE;
720 			bufread(t->file, q0, r, n);
721 			bufinsert(&snarfbuf, snarfbuf.nc, r, n);
722 			q0 += n;
723 		}
724 		fbuffree(r);
725 		putsnarf();
726 	}
727 	if(docut){
728 		textdelete(t, t->q0, t->q1, TRUE);
729 		textsetselect(t, t->q0, t->q0);
730 		if(t->w){
731 			textscrdraw(t);
732 			winsettag(t->w);
733 		}
734 	}else if(dosnarf)	/* Snarf command */
735 		argtext = t;
736 	if(locked)
737 		winunlock(t->w);
738 }
739 
740 void
741 paste(Text *et, Text *t, Text*, int selectall, int tobody, Rune*, int)
742 {
743 	int c;
744 	uint q, q0, q1, n;
745 	Rune *r;
746 
747 	/* if(tobody), use body of executing window  (Paste or Send command) */
748 	if(tobody && et!=nil && et->w!=nil){
749 		t = &et->w->body;
750 		filemark(t->file);	/* seq has been incremented by execute */
751 	}
752 	if(t == nil)
753 		return;
754 
755 	getsnarf();
756 	if(t==nil || snarfbuf.nc==0)
757 		return;
758 	if(t->w!=nil && et->w!=t->w){
759 		c = 'M';
760 		if(et->w)
761 			c = et->w->owner;
762 		winlock(t->w, c);
763 	}
764 	cut(t, t, nil, FALSE, TRUE, nil, 0);
765 	q = 0;
766 	q0 = t->q0;
767 	q1 = t->q0+snarfbuf.nc;
768 	r = fbufalloc();
769 	while(q0 < q1){
770 		n = q1 - q0;
771 		if(n > RBUFSIZE)
772 			n = RBUFSIZE;
773 		if(r == nil)
774 			r = runemalloc(n);
775 		bufread(&snarfbuf, q, r, n);
776 		textinsert(t, q0, r, n, TRUE);
777 		q += n;
778 		q0 += n;
779 	}
780 	fbuffree(r);
781 	if(selectall)
782 		textsetselect(t, t->q0, q1);
783 	else
784 		textsetselect(t, q1, q1);
785 	if(t->w){
786 		textscrdraw(t);
787 		winsettag(t->w);
788 	}
789 	if(t->w!=nil && et->w!=t->w)
790 		winunlock(t->w);
791 }
792 
793 void
794 look(Text *et, Text *t, Text *argt, int, int, Rune *arg, int narg)
795 {
796 	Rune *r;
797 	int n;
798 
799 	if(et && et->w){
800 		t = &et->w->body;
801 		if(narg > 0){
802 			search(t, arg, narg);
803 			return;
804 		}
805 		getarg(argt, FALSE, FALSE, &r, &n);
806 		if(r == nil){
807 			n = t->q1-t->q0;
808 			r = runemalloc(n);
809 			bufread(t->file, t->q0, r, n);
810 		}
811 		search(t, r, n);
812 		free(r);
813 	}
814 }
815 
816 void
817 sendx(Text *et, Text *t, Text*, int, int, Rune*, int)
818 {
819 	if(et->w==nil)
820 		return;
821 	t = &et->w->body;
822 	if(t->q0 != t->q1)
823 		cut(t, t, nil, TRUE, FALSE, nil, 0);
824 	textsetselect(t, t->file->nc, t->file->nc);
825 	paste(t, t, nil, TRUE, TRUE, nil, 0);
826 	if(textreadc(t, t->file->nc-1) != '\n'){
827 		textinsert(t, t->file->nc, L"\n", 1, TRUE);
828 		textsetselect(t, t->file->nc, t->file->nc);
829 	}
830 }
831 
832 void
833 edit(Text *et, Text*, Text *argt, int, int, Rune *arg, int narg)
834 {
835 	Rune *r;
836 	int len;
837 
838 	if(et == nil)
839 		return;
840 	getarg(argt, FALSE, TRUE, &r, &len);
841 	seq++;
842 	if(r != nil){
843 		editcmd(et, r, len);
844 		free(r);
845 	}else
846 		editcmd(et, arg, narg);
847 }
848 
849 void
850 exit(Text*, Text*, Text*, int, int, Rune*, int)
851 {
852 	if(rowclean(&row)){
853 		sendul(cexit, 0);
854 		threadexits(nil);
855 	}
856 }
857 
858 void
859 putall(Text*, Text*, Text*, int, int, Rune*, int)
860 {
861 	int i, j, e;
862 	Window *w;
863 	Column *c;
864 	char *a;
865 
866 	for(i=0; i<row.ncol; i++){
867 		c = row.col[i];
868 		for(j=0; j<c->nw; j++){
869 			w = c->w[j];
870 			if(w->isscratch || w->isdir || w->body.file->nname==0)
871 				continue;
872 			if(w->nopen[QWevent] > 0)
873 				continue;
874 			a = runetobyte(w->body.file->name, w->body.file->nname);
875 			e = access(a, 0);
876 			if(w->body.file->mod || w->body.ncache)
877 				if(e < 0)
878 					warning(nil, "no auto-Put of %s: %r\n", a);
879 				else{
880 					wincommit(w, &w->body);
881 					put(&w->body, nil, nil, XXX, XXX, nil, 0);
882 				}
883 			free(a);
884 		}
885 	}
886 }
887 
888 
889 void
890 id(Text *et, Text*, Text*, int, int, Rune*, int)
891 {
892 	if(et && et->w)
893 		warning(nil, "/mnt/acme/%d/\n", et->w->id);
894 }
895 
896 void
897 local(Text *et, Text*, Text *argt, int, int, Rune *arg, int narg)
898 {
899 	char *a, *aa;
900 	Runestr dir;
901 
902 	aa = getbytearg(argt, TRUE, TRUE, &a);
903 
904 	dir = dirname(et, nil, 0);
905 	if(dir.nr==1 && dir.r[0]=='.'){	/* sigh */
906 		free(dir.r);
907 		dir.r = nil;
908 		dir.nr = 0;
909 	}
910 	run(nil, runetobyte(arg, narg), dir.r, dir.nr, FALSE, aa, a, FALSE);
911 }
912 
913 void
914 kill(Text*, Text*, Text *argt, int, int, Rune *arg, int narg)
915 {
916 	Rune *a, *cmd, *r;
917 	int na;
918 
919 	getarg(argt, FALSE, FALSE, &r, &na);
920 	if(r)
921 		kill(nil, nil, nil, 0, 0, r, na);
922 	/* loop condition: *arg is not a blank */
923 	for(;;){
924 		a = findbl(arg, narg, &na);
925 		if(a == arg)
926 			break;
927 		cmd = runemalloc(narg-na+1);
928 		runemove(cmd, arg, narg-na);
929 		sendp(ckill, cmd);
930 		arg = skipbl(a, na, &narg);
931 	}
932 }
933 
934 void
935 fontx(Text *et, Text *t, Text *argt, int, int, Rune *arg, int narg)
936 {
937 	Rune *a, *r, *flag, *file;
938 	int na, nf;
939 	char *aa;
940 	Reffont *newfont;
941 	Dirlist *dp;
942 	int i, fix;
943 
944 	if(et==nil || et->w==nil)
945 		return;
946 	t = &et->w->body;
947 	flag = nil;
948 	file = nil;
949 	/* loop condition: *arg is not a blank */
950 	nf = 0;
951 	for(;;){
952 		a = findbl(arg, narg, &na);
953 		if(a == arg)
954 			break;
955 		r = runemalloc(narg-na+1);
956 		runemove(r, arg, narg-na);
957 		if(runeeq(r, narg-na, L"fix", 3) || runeeq(r, narg-na, L"var", 3)){
958 			free(flag);
959 			flag = r;
960 		}else{
961 			free(file);
962 			file = r;
963 			nf = narg-na;
964 		}
965 		arg = skipbl(a, na, &narg);
966 	}
967 	getarg(argt, FALSE, TRUE, &r, &na);
968 	if(r)
969 		if(runeeq(r, na, L"fix", 3) || runeeq(r, na, L"var", 3)){
970 			free(flag);
971 			flag = r;
972 		}else{
973 			free(file);
974 			file = r;
975 			nf = na;
976 		}
977 	fix = 1;
978 	if(flag)
979 		fix = runeeq(flag, runestrlen(flag), L"fix", 3);
980 	else if(file == nil){
981 		newfont = rfget(FALSE, FALSE, FALSE, nil);
982 		if(newfont)
983 			fix = strcmp(newfont->f->name, t->font->name)==0;
984 	}
985 	if(file){
986 		aa = runetobyte(file, nf);
987 		newfont = rfget(fix, flag!=nil, FALSE, aa);
988 		free(aa);
989 	}else
990 		newfont = rfget(fix, FALSE, FALSE, nil);
991 	if(newfont){
992 		draw(screen, t->w->r, textcols[BACK], nil, ZP);
993 		rfclose(t->reffont);
994 		t->reffont = newfont;
995 		t->font = newfont->f;
996 		frinittick(t);
997 		if(t->w->isdir){
998 			t->all.min.x++;	/* force recolumnation; disgusting! */
999 			for(i=0; i<t->w->ndl; i++){
1000 				dp = t->w->dlp[i];
1001 				aa = runetobyte(dp->r, dp->nr);
1002 				dp->wid = stringwidth(newfont->f, aa);
1003 				free(aa);
1004 			}
1005 		}
1006 		/* avoid shrinking of window due to quantization */
1007 		colgrow(t->w->col, t->w, -1);
1008 	}
1009 	free(file);
1010 	free(flag);
1011 }
1012 
1013 void
1014 incl(Text *et, Text*, Text *argt, int, int, Rune *arg, int narg)
1015 {
1016 	Rune *a, *r;
1017 	Window *w;
1018 	int na, n, len;
1019 
1020 	if(et==nil || et->w==nil)
1021 		return;
1022 	w = et->w;
1023 	n = 0;
1024 	getarg(argt, FALSE, TRUE, &r, &len);
1025 	if(r){
1026 		n++;
1027 		winaddincl(w, r, len);
1028 	}
1029 	/* loop condition: *arg is not a blank */
1030 	for(;;){
1031 		a = findbl(arg, narg, &na);
1032 		if(a == arg)
1033 			break;
1034 		r = runemalloc(narg-na+1);
1035 		runemove(r, arg, narg-na);
1036 		n++;
1037 		winaddincl(w, r, narg-na);
1038 		arg = skipbl(a, na, &narg);
1039 	}
1040 	if(n==0 && w->nincl){
1041 		for(n=w->nincl; --n>=0; )
1042 			warning(nil, "%S ", w->incl[n]);
1043 		warning(nil, "\n");
1044 	}
1045 }
1046 
1047 enum {
1048 	IGlobal = -2,
1049 	IError = -1,
1050 	Ion = 0,
1051 	Ioff = 1,
1052 };
1053 
1054 static int
1055 indentval(Rune *s, int n)
1056 {
1057 	if(n < 2)
1058 		return IError;
1059 	if(runestrncmp(s, L"ON", n) == 0){
1060 		globalautoindent = TRUE;
1061 		warning(nil, "Indent ON\n");
1062 		return IGlobal;
1063 	}
1064 	if(runestrncmp(s, L"OFF", n) == 0){
1065 		globalautoindent = FALSE;
1066 		warning(nil, "Indent OFF\n");
1067 		return IGlobal;
1068 	}
1069 	return runestrncmp(s, L"on", n) == 0;
1070 }
1071 
1072 static void
1073 fixindent(Window *w, void*)
1074 {
1075 	w->autoindent = globalautoindent;
1076 }
1077 
1078 void
1079 indent(Text *et, Text*, Text *argt, int, int, Rune *arg, int narg)
1080 {
1081 	Rune *a, *r;
1082 	Window *w;
1083 	int na, len, autoindent;
1084 
1085 	w = nil;
1086 	if(et!=nil && et->w!=nil)
1087 		w = et->w;
1088 	autoindent = IError;
1089 	getarg(argt, FALSE, TRUE, &r, &len);
1090 	if(r!=nil && len>0)
1091 		autoindent = indentval(r, len);
1092 	else{
1093 		a = findbl(arg, narg, &na);
1094 		if(a != arg)
1095 			autoindent = indentval(arg, narg-na);
1096 	}
1097 	if(autoindent == IGlobal)
1098 		allwindows(fixindent, nil);
1099 	else if(w != nil && autoindent >= 0)
1100 		w->autoindent = autoindent;
1101 }
1102 
1103 void
1104 tab(Text *et, Text*, Text *argt, int, int, Rune *arg, int narg)
1105 {
1106 	Rune *a, *r;
1107 	Window *w;
1108 	int na, len, tab;
1109 	char *p;
1110 
1111 	if(et==nil || et->w==nil)
1112 		return;
1113 	w = et->w;
1114 	getarg(argt, FALSE, TRUE, &r, &len);
1115 	tab = 0;
1116 	if(r!=nil && len>0){
1117 		p = runetobyte(r, len);
1118 		if('0'<=p[0] && p[0]<='9')
1119 			tab = atoi(p);
1120 		free(p);
1121 	}else{
1122 		a = findbl(arg, narg, &na);
1123 		if(a != arg){
1124 			p = runetobyte(arg, narg-na);
1125 			if('0'<=p[0] && p[0]<='9')
1126 				tab = atoi(p);
1127 			free(p);
1128 		}
1129 	}
1130 	if(tab > 0){
1131 		if(w->body.tabstop != tab){
1132 			w->body.tabstop = tab;
1133 			winresize(w, w->r, 1);
1134 		}
1135 	}else
1136 		warning(nil, "%.*S: Tab %d\n", w->body.file->nname, w->body.file->name, w->body.tabstop);
1137 }
1138 
1139 void
1140 runproc(void *argvp)
1141 {
1142 	/* args: */
1143 		Window *win;
1144 		char *s;
1145 		Rune *rdir;
1146 		int ndir;
1147 		int newns;
1148 		char *argaddr;
1149 		char *arg;
1150 		Command *c;
1151 		Channel *cpid;
1152 		int iseditcmd;
1153 	/* end of args */
1154 	char *e, *t, *name, *filename, *dir, **av, *news;
1155 	Rune r, **incl;
1156 	int ac, w, inarg, i, n, fd, nincl, winid;
1157 	int pipechar;
1158 	char buf[512];
1159 	static void *parg[2];
1160 	void **argv;
1161 
1162 	argv = argvp;
1163 	win = argv[0];
1164 	s = argv[1];
1165 	rdir = argv[2];
1166 	ndir = (uintptr)argv[3];
1167 	newns = (uintptr)argv[4];
1168 	argaddr = argv[5];
1169 	arg = argv[6];
1170 	c = argv[7];
1171 	cpid = argv[8];
1172 	iseditcmd = (uintptr)argv[9];
1173 	free(argv);
1174 
1175 	t = s;
1176 	while(*t==' ' || *t=='\n' || *t=='\t')
1177 		t++;
1178 	for(e=t; *e; e++)
1179 		if(*e==' ' || *e=='\n' || *e=='\t' )
1180 			break;
1181 	name = emalloc((e-t)+2);
1182 	memmove(name, t, e-t);
1183 	name[e-t] = 0;
1184 	e = utfrrune(name, '/');
1185 	if(e)
1186 		memmove(name, e+1, strlen(e+1)+1);	/* strcpy but overlaps */
1187 	strcat(name, " ");	/* add blank here for ease in waittask */
1188 	c->name = bytetorune(name, &c->nname);
1189 	free(name);
1190 	pipechar = 0;
1191 	if(*t=='<' || *t=='|' || *t=='>')
1192 		pipechar = *t++;
1193 	c->iseditcmd = iseditcmd;
1194 	c->text = s;
1195 	if(rdir != nil){
1196 		dir = runetobyte(rdir, ndir);
1197 		chdir(dir);	/* ignore error: probably app. window */
1198 		free(dir);
1199 	}
1200 	if(newns){
1201 		nincl = 0;
1202 		incl = nil;
1203 		if(win){
1204 			filename = smprint("%.*S", win->body.file->nname, win->body.file->name);
1205 			nincl = win->nincl;
1206 			if(nincl > 0){
1207 				incl = emalloc(nincl*sizeof(Rune*));
1208 				for(i=0; i<nincl; i++){
1209 					n = runestrlen(win->incl[i]);
1210 					incl[i] = runemalloc(n+1);
1211 					runemove(incl[i], win->incl[i], n);
1212 				}
1213 			}
1214 			winid = win->id;
1215 		}else{
1216 			filename = nil;
1217 			winid = 0;
1218 			if(activewin)
1219 				winid = activewin->id;
1220 		}
1221 		rfork(RFNAMEG|RFENVG|RFFDG|RFNOTEG);
1222 		sprint(buf, "%d", winid);
1223 		putenv("winid", buf);
1224 
1225 		if(filename){
1226 			putenv("%", filename);
1227 			free(filename);
1228 		}
1229 		c->md = fsysmount(rdir, ndir, incl, nincl);
1230 		if(c->md == nil){
1231 			fprint(2, "child: can't mount /dev/cons: %r\n");
1232 			threadexits("mount");
1233 		}
1234 		close(0);
1235 		if(winid>0 && (pipechar=='|' || pipechar=='>')){
1236 			sprint(buf, "/mnt/acme/%d/rdsel", winid);
1237 			open(buf, OREAD);
1238 		}else
1239 			open("/dev/null", OREAD);
1240 		close(1);
1241 		if((winid>0 || iseditcmd) && (pipechar=='|' || pipechar=='<')){
1242 			if(iseditcmd){
1243 				if(winid > 0)
1244 					sprint(buf, "/mnt/acme/%d/editout", winid);
1245 				else
1246 					sprint(buf, "/mnt/acme/editout");
1247 			}else
1248 				sprint(buf, "/mnt/acme/%d/wrsel", winid);
1249 			open(buf, OWRITE);
1250 			close(2);
1251 			open("/dev/cons", OWRITE);
1252 		}else{
1253 			open("/dev/cons", OWRITE);
1254 			dup(1, 2);
1255 		}
1256 	}else{
1257 		rfork(RFFDG|RFNOTEG);
1258 		fsysclose();
1259 		close(0);
1260 		open("/dev/null", OREAD);
1261 		close(1);
1262 		open(acmeerrorfile, OWRITE);
1263 		dup(1, 2);
1264 	}
1265 
1266 	if(win)
1267 		winclose(win);
1268 
1269 	if(argaddr)
1270 		putenv("acmeaddr", argaddr);
1271 	if(strlen(t) > sizeof buf-10)	/* may need to print into stack */
1272 		goto Hard;
1273 	inarg = FALSE;
1274 	for(e=t; *e; e+=w){
1275 		w = chartorune(&r, e);
1276 		if(r==' ' || r=='\t')
1277 			continue;
1278 		if(r < ' ')
1279 			goto Hard;
1280 		if(utfrune("#;&|^$=`'{}()<>[]*?^~`", r))
1281 			goto Hard;
1282 		inarg = TRUE;
1283 	}
1284 	if(!inarg)
1285 		goto Fail;
1286 
1287 	ac = 0;
1288 	av = nil;
1289 	inarg = FALSE;
1290 	for(e=t; *e; e+=w){
1291 		w = chartorune(&r, e);
1292 		if(r==' ' || r=='\t'){
1293 			inarg = FALSE;
1294 			*e = 0;
1295 			continue;
1296 		}
1297 		if(!inarg){
1298 			inarg = TRUE;
1299 			av = realloc(av, (ac+1)*sizeof(char**));
1300 			av[ac++] = e;
1301 		}
1302 	}
1303 	av = realloc(av, (ac+2)*sizeof(char**));
1304 	av[ac++] = arg;
1305 	av[ac] = nil;
1306 	c->av = av;
1307 	procexec(cpid, av[0], av);
1308 	e = av[0];
1309 	if(e[0]=='/' || (e[0]=='.' && e[1]=='/'))
1310 		goto Fail;
1311 	if(cputype){
1312 		sprint(buf, "%s/%s", cputype, av[0]);
1313 		procexec(cpid, buf, av);
1314 	}
1315 	sprint(buf, "/bin/%s", av[0]);
1316 	procexec(cpid, buf, av);
1317 	goto Fail;
1318 
1319 Hard:
1320 
1321 	/*
1322 	 * ugly: set path = (. $cputype /bin)
1323 	 * should honor $path if unusual.
1324 	 */
1325 	if(cputype){
1326 		n = 0;
1327 		memmove(buf+n, ".", 2);
1328 		n += 2;
1329 		i = strlen(cputype)+1;
1330 		memmove(buf+n, cputype, i);
1331 		n += i;
1332 		memmove(buf+n, "/bin", 5);
1333 		n += 5;
1334 		fd = create("/env/path", OWRITE, 0666);
1335 		write(fd, buf, n);
1336 		close(fd);
1337 	}
1338 
1339 	if(arg){
1340 		news = emalloc(strlen(t) + 1 + 1 + strlen(arg) + 1 + 1);
1341 		if(news){
1342 			sprint(news, "%s '%s'", t, arg);	/* BUG: what if quote in arg? */
1343 			free(s);
1344 			t = news;
1345 			c->text = news;
1346 		}
1347 	}
1348 	procexecl(cpid, "/bin/rc", "rc", "-c", t, nil);
1349 
1350    Fail:
1351 	/* procexec hasn't happened, so send a zero */
1352 	sendul(cpid, 0);
1353 	threadexits(nil);
1354 }
1355 
1356 void
1357 runwaittask(void *v)
1358 {
1359 	Command *c;
1360 	Channel *cpid;
1361 	void **a;
1362 
1363 	threadsetname("runwaittask");
1364 	a = v;
1365 	c = a[0];
1366 	cpid = a[1];
1367 	free(a);
1368 	do
1369 		c->pid = recvul(cpid);
1370 	while(c->pid == ~0);
1371 	free(c->av);
1372 	if(c->pid != 0)	/* successful exec */
1373 		sendp(ccommand, c);
1374 	else{
1375 		if(c->iseditcmd)
1376 			sendul(cedit, 0);
1377 		free(c->name);
1378 		free(c->text);
1379 		free(c);
1380 	}
1381 	chanfree(cpid);
1382 }
1383 
1384 void
1385 run(Window *win, char *s, Rune *rdir, int ndir, int newns, char *argaddr, char *xarg, int iseditcmd)
1386 {
1387 	void **arg;
1388 	Command *c;
1389 	Channel *cpid;
1390 
1391 	if(s == nil)
1392 		return;
1393 
1394 	arg = emalloc(10*sizeof(void*));
1395 	c = emalloc(sizeof *c);
1396 	cpid = chancreate(sizeof(ulong), 0);
1397 	arg[0] = win;
1398 	arg[1] = s;
1399 	arg[2] = rdir;
1400 	arg[3] = (void*)ndir;
1401 	arg[4] = (void*)newns;
1402 	arg[5] = argaddr;
1403 	arg[6] = xarg;
1404 	arg[7] = c;
1405 	arg[8] = cpid;
1406 	arg[9] = (void*)iseditcmd;
1407 	proccreate(runproc, arg, STACK);
1408 	/* mustn't block here because must be ready to answer mount() call in run() */
1409 	arg = emalloc(2*sizeof(void*));
1410 	arg[0] = c;
1411 	arg[1] = cpid;
1412 	threadcreate(runwaittask, arg, STACK);
1413 }
1414