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Date:: Tue Aug 2 11:44:11 2011 UTC
Message:: acme: scrolling fixes + new home/end Home and End previously navigated between two different window locations: the top and the bottom of the text. Now they include a third waypoint: the location where typing last happened. Thus, in a win window, typing ls -l <home> scrolls to the beginning of the ls -l output. A second <home> continues to the top of the file. Makes Send scroll always, along with writes by external programs to +Errors. R=r CC=mccoyst http://codereview.appspot.com/4830051
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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 <9pclient.h>
12 #include "dat.h"
13 #include "fns.h"
14 
15 Buffer	snarfbuf;
16 
17 /*
18  * These functions get called as:
19  *
20  *	fn(et, t, argt, flag1, flag1, flag2, s, n);
21  *
22  * Where the arguments are:
23  *
24  *	et: the Text* in which the executing event (click) occurred
25  *	t: the Text* containing the current selection (Edit, Cut, Snarf, Paste)
26  *	argt: the Text* containing the argument for a 2-1 click.
27  *	e->flag1: from Exectab entry
28  * 	e->flag2: from Exectab entry
29  *	s: the command line remainder (e.g., "x" if executing "Dump x")
30  *	n: length of s  (s is *not* NUL-terminated)
31  */
32 
33 void doabort(Text*, Text*, Text*, int, int, Rune*, int);
34 void	del(Text*, Text*, Text*, int, int, Rune*, int);
35 void	delcol(Text*, Text*, Text*, int, int, Rune*, int);
36 void	dotfiles(Text*, Text*, Text*, int, int, Rune*, int);
37 void	dump(Text*, Text*, Text*, int, int, Rune*, int);
38 void	edit(Text*, Text*, Text*, int, int, Rune*, int);
39 void	xexit(Text*, Text*, Text*, int, int, Rune*, int);
40 void	fontx(Text*, Text*, Text*, int, int, Rune*, int);
41 void	get(Text*, Text*, Text*, int, int, Rune*, int);
42 void	id(Text*, Text*, Text*, int, int, Rune*, int);
43 void	incl(Text*, Text*, Text*, int, int, Rune*, int);
44 void	indent(Text*, Text*, Text*, int, int, Rune*, int);
45 void	xkill(Text*, Text*, Text*, int, int, Rune*, int);
46 void	local(Text*, Text*, Text*, int, int, Rune*, int);
47 void	look(Text*, Text*, Text*, int, int, Rune*, int);
48 void	newcol(Text*, Text*, Text*, int, int, Rune*, int);
49 void	paste(Text*, Text*, Text*, int, int, Rune*, int);
50 void	put(Text*, Text*, Text*, int, int, Rune*, int);
51 void	putall(Text*, Text*, Text*, int, int, Rune*, int);
52 void	sendx(Text*, Text*, Text*, int, int, Rune*, int);
53 void	sort(Text*, Text*, Text*, int, int, Rune*, int);
54 void	tab(Text*, Text*, Text*, int, int, Rune*, int);
55 void	zeroxx(Text*, Text*, Text*, int, int, Rune*, int);
56 
57 typedef struct Exectab Exectab;
58 struct Exectab
59 {
60 	Rune	*name;
61 	void	(*fn)(Text*, Text*, Text*, int, int, Rune*, int);
62 	int		mark;
63 	int		flag1;
64 	int		flag2;
65 };
66 
67 static Rune LAbort[] = { 'A', 'b', 'o', 'r', 't', 0 };
68 static Rune LCut[] = { 'C', 'u', 't', 0 };
69 static Rune LDel[] = { 'D', 'e', 'l', 0 };
70 static Rune LDelcol[] = { 'D', 'e', 'l', 'c', 'o', 'l', 0 };
71 static Rune LDelete[] = { 'D', 'e', 'l', 'e', 't', 'e', 0 };
72 static Rune LDump[] = { 'D', 'u', 'm', 'p', 0 };
73 static Rune LEdit[] = { 'E', 'd', 'i', 't', 0 };
74 static Rune LExit[] = { 'E', 'x', 'i', 't', 0 };
75 static Rune LFont[] = { 'F', 'o', 'n', 't', 0 };
76 static Rune LGet[] = { 'G', 'e', 't', 0 };
77 static Rune LID[] = { 'I', 'D', 0 };
78 static Rune LIncl[] = { 'I', 'n', 'c', 'l', 0 };
79 static Rune LIndent[] = { 'I', 'n', 'd', 'e', 'n', 't', 0 };
80 static Rune LKill[] = { 'K', 'i', 'l', 'l', 0 };
81 static Rune LLoad[] = { 'L', 'o', 'a', 'd', 0 };
82 static Rune LLocal[] = { 'L', 'o', 'c', 'a', 'l', 0 };
83 static Rune LLook[] = { 'L', 'o', 'o', 'k', 0 };
84 static Rune LNew[] = { 'N', 'e', 'w', 0 };
85 static Rune LNewcol[] = { 'N', 'e', 'w', 'c', 'o', 'l', 0 };
86 static Rune LPaste[] = { 'P', 'a', 's', 't', 'e', 0 };
87 static Rune LPut[] = { 'P', 'u', 't', 0 };
88 static Rune LPutall[] = { 'P', 'u', 't', 'a', 'l', 'l', 0 };
89 static Rune LRedo[] = { 'R', 'e', 'd', 'o', 0 };
90 static Rune LSend[] = { 'S', 'e', 'n', 'd', 0 };
91 static Rune LSnarf[] = { 'S', 'n', 'a', 'r', 'f', 0 };
92 static Rune LSort[] = { 'S', 'o', 'r', 't', 0 };
93 static Rune LTab[] = { 'T', 'a', 'b', 0 };
94 static Rune LUndo[] = { 'U', 'n', 'd', 'o', 0 };
95 static Rune LZerox[] = { 'Z', 'e', 'r', 'o', 'x', 0 };
96 
97 Exectab exectab[] = {
98 	{ LAbort,		doabort,	FALSE,	XXX,		XXX,		},
99 	{ LCut,		cut,		TRUE,	TRUE,	TRUE	},
100 	{ LDel,		del,		FALSE,	FALSE,	XXX		},
101 	{ LDelcol,		delcol,	FALSE,	XXX,		XXX		},
102 	{ LDelete,		del,		FALSE,	TRUE,	XXX		},
103 	{ LDump,		dump,	FALSE,	TRUE,	XXX		},
104 	{ LEdit,		edit,		FALSE,	XXX,		XXX		},
105 	{ LExit,		xexit,	FALSE,	XXX,		XXX		},
106 	{ LFont,		fontx,	FALSE,	XXX,		XXX		},
107 	{ LGet,		get,		FALSE,	TRUE,	XXX		},
108 	{ LID,		id,		FALSE,	XXX,		XXX		},
109 	{ LIncl,		incl,		FALSE,	XXX,		XXX		},
110 	{ LIndent,		indent,	FALSE,	XXX,		XXX		},
111 	{ LKill,		xkill,		FALSE,	XXX,		XXX		},
112 	{ LLoad,		dump,	FALSE,	FALSE,	XXX		},
113 	{ LLocal,		local,	FALSE,	XXX,		XXX		},
114 	{ LLook,		look,		FALSE,	XXX,		XXX		},
115 	{ LNew,		new,		FALSE,	XXX,		XXX		},
116 	{ LNewcol,	newcol,	FALSE,	XXX,		XXX		},
117 	{ LPaste,		paste,	TRUE,	TRUE,	XXX		},
118 	{ LPut,		put,		FALSE,	XXX,		XXX		},
119 	{ LPutall,		putall,	FALSE,	XXX,		XXX		},
120 	{ LRedo,		undo,	FALSE,	FALSE,	XXX		},
121 	{ LSend,		sendx,	TRUE,	XXX,		XXX		},
122 	{ LSnarf,		cut,		FALSE,	TRUE,	FALSE	},
123 	{ LSort,		sort,		FALSE,	XXX,		XXX		},
124 	{ LTab,		tab,		FALSE,	XXX,		XXX		},
125 	{ LUndo,		undo,	FALSE,	TRUE,	XXX		},
126 	{ LZerox,		zeroxx,	FALSE,	XXX,		XXX		},
127 	{ nil, 			0,		0,		0,		0		}
128 };
129 
130 Exectab*
131 lookup(Rune *r, int n)
132 {
133 	Exectab *e;
134 	int nr;
135 
136 	r = skipbl(r, n, &n);
137 	if(n == 0)
138 		return nil;
139 	findbl(r, n, &nr);
140 	nr = n-nr;
141 	for(e=exectab; e->name; e++)
142 		if(runeeq(r, nr, e->name, runestrlen(e->name)) == TRUE)
143 			return e;
144 	return nil;
145 }
146 
147 int
148 isexecc(int c)
149 {
150 	if(isfilec(c))
151 		return 1;
152 	return c=='<' || c=='|' || c=='>';
153 }
154 
155 void
156 execute(Text *t, uint aq0, uint aq1, int external, Text *argt)
157 {
158 	uint q0, q1;
159 	Rune *r, *s;
160 	char *b, *a, *aa;
161 	Exectab *e;
162 	int c, n, f;
163 	Runestr dir;
164 
165 	q0 = aq0;
166 	q1 = aq1;
167 	if(q1 == q0){	/* expand to find word (actually file name) */
168 		/* if in selection, choose selection */
169 		if(t->q1>t->q0 && t->q0<=q0 && q0<=t->q1){
170 			q0 = t->q0;
171 			q1 = t->q1;
172 		}else{
173 			while(q1<t->file->b.nc && isexecc(c=textreadc(t, q1)) && c!=':')
174 				q1++;
175 			while(q0>0 && isexecc(c=textreadc(t, q0-1)) && c!=':')
176 				q0--;
177 			if(q1 == q0)
178 				return;
179 		}
180 	}
181 	r = runemalloc(q1-q0);
182 	bufread(&t->file->b, q0, r, q1-q0);
183 	e = lookup(r, q1-q0);
184 	if(!external && t->w!=nil && t->w->nopen[QWevent]>0){
185 		f = 0;
186 		if(e)
187 			f |= 1;
188 		if(q0!=aq0 || q1!=aq1){
189 			bufread(&t->file->b, aq0, r, aq1-aq0);
190 			f |= 2;
191 		}
192 		aa = getbytearg(argt, TRUE, TRUE, &a);
193 		if(a){	
194 			if(strlen(a) > EVENTSIZE){	/* too big; too bad */
195 				free(aa);
196 				free(a);
197 				warning(nil, "argument string too long\n");
198 				return;
199 			}
200 			f |= 8;
201 		}
202 		c = 'x';
203 		if(t->what == Body)
204 			c = 'X';
205 		n = aq1-aq0;
206 		if(n <= EVENTSIZE)
207 			winevent(t->w, "%c%d %d %d %d %.*S\n", c, aq0, aq1, f, n, n, r);
208 		else
209 			winevent(t->w, "%c%d %d %d 0 \n", c, aq0, aq1, f, n);
210 		if(q0!=aq0 || q1!=aq1){
211 			n = q1-q0;
212 			bufread(&t->file->b, q0, r, n);
213 			if(n <= EVENTSIZE)
214 				winevent(t->w, "%c%d %d 0 %d %.*S\n", c, q0, q1, n, n, r);
215 			else
216 				winevent(t->w, "%c%d %d 0 0 \n", c, q0, q1, n);
217 		}
218 		if(a){
219 			winevent(t->w, "%c0 0 0 %d %s\n", c, utflen(a), a);
220 			if(aa)
221 				winevent(t->w, "%c0 0 0 %d %s\n", c, utflen(aa), aa);
222 			else
223 				winevent(t->w, "%c0 0 0 0 \n", c);
224 		}
225 		free(r);
226 		free(aa);
227 		free(a);
228 		return;
229 	}
230 	if(e){
231 		if(e->mark && seltext!=nil)
232 		if(seltext->what == Body){
233 			seq++;
234 			filemark(seltext->w->body.file);
235 		}
236 		s = skipbl(r, q1-q0, &n);
237 		s = findbl(s, n, &n);
238 		s = skipbl(s, n, &n);
239 		(*e->fn)(t, seltext, argt, e->flag1, e->flag2, s, n);
240 		free(r);
241 		return;
242 	}
243 
244 	b = runetobyte(r, q1-q0);
245 	free(r);
246 	dir = dirname(t, nil, 0);
247 	if(dir.nr==1 && dir.r[0]=='.'){	/* sigh */
248 		free(dir.r);
249 		dir.r = nil;
250 		dir.nr = 0;
251 	}
252 	aa = getbytearg(argt, TRUE, TRUE, &a);
253 	if(t->w)
254 		incref(&t->w->ref);
255 	run(t->w, b, dir.r, dir.nr, TRUE, aa, a, FALSE);
256 }
257 
258 char*
259 printarg(Text *argt, uint q0, uint q1)
260 {
261 	char *buf;
262 
263 	if(argt->what!=Body || argt->file->name==nil)
264 		return nil;
265 	buf = emalloc(argt->file->nname+32);
266 	if(q0 == q1)
267 		sprint(buf, "%.*S:#%d", argt->file->nname, argt->file->name, q0);
268 	else
269 		sprint(buf, "%.*S:#%d,#%d", argt->file->nname, argt->file->name, q0, q1);
270 	return buf;
271 }
272 
273 char*
274 getarg(Text *argt, int doaddr, int dofile, Rune **rp, int *nrp)
275 {
276 	int n;
277 	Expand e;
278 	char *a;
279 
280 	*rp = nil;
281 	*nrp = 0;
282 	if(argt == nil)
283 		return nil;
284 	a = nil;
285 	textcommit(argt, TRUE);
286 	if(expand(argt, argt->q0, argt->q1, &e)){
287 		free(e.bname);
288 		if(e.nname && dofile){
289 			e.name = runerealloc(e.name, e.nname+1);
290 			if(doaddr)
291 				a = printarg(argt, e.q0, e.q1);
292 			*rp = e.name;
293 			*nrp = e.nname;
294 			return a;
295 		}
296 		free(e.name);
297 	}else{
298 		e.q0 = argt->q0;
299 		e.q1 = argt->q1;
300 	}
301 	n = e.q1 - e.q0;
302 	*rp = runemalloc(n+1);
303 	bufread(&argt->file->b, e.q0, *rp, n);
304 	if(doaddr)
305 		a = printarg(argt, e.q0, e.q1);
306 	*nrp = n;
307 	return a;
308 }
309 
310 char*
311 getbytearg(Text *argt, int doaddr, int dofile, char **bp)
312 {
313 	Rune *r;
314 	int n;
315 	char *aa;
316 
317 	*bp = nil;
318 	aa = getarg(argt, doaddr, dofile, &r, &n);
319 	if(r == nil)
320 		return nil;
321 	*bp = runetobyte(r, n);
322 	free(r);
323 	return aa;
324 }
325 
326 void
327 doabort(Text *__0, Text *_0, Text *_1, int _2, int _3, Rune *_4, int _5)
328 {
329 	static int n;
330 
331 	USED(__0);
332 	USED(_0);
333 	USED(_1);
334 	USED(_2);
335 	USED(_3);
336 	USED(_4);
337 	USED(_5);
338 
339 	if(n++ == 0)
340 		warning(nil, "executing Abort again will call abort()\n");
341 	else
342 		abort();
343 }
344 
345 void
346 newcol(Text *et, Text *_0, Text *_1, int _2, int _3, Rune *_4, int _5)
347 {
348 	Column *c;
349 
350 	USED(_0);
351 	USED(_1);
352 	USED(_2);
353 	USED(_3);
354 	USED(_4);
355 	USED(_5);
356 
357 	c = rowadd(et->row, nil, -1);
358 	if(c)
359 		winsettag(coladd(c, nil, nil, -1));
360 }
361 
362 void
363 delcol(Text *et, Text *_0, Text *_1, int _2, int _3, Rune *_4, int _5)
364 {
365 	int i;
366 	Column *c;
367 	Window *w;
368 
369 	USED(_0);
370 	USED(_1);
371 	USED(_2);
372 	USED(_3);
373 	USED(_4);
374 	USED(_5);
375 
376 	c = et->col;
377 	if(c==nil || colclean(c)==0)
378 		return;
379 	for(i=0; i<c->nw; i++){
380 		w = c->w[i];
381 		if(w->nopen[QWevent]+w->nopen[QWaddr]+w->nopen[QWdata]+w->nopen[QWxdata] > 0){
382 			warning(nil, "can't delete column; %.*S is running an external command\n", w->body.file->nname, w->body.file->name);
383 			return;
384 		}
385 	}
386 	rowclose(et->col->row, et->col, TRUE);
387 }
388 
389 void
390 del(Text *et, Text *_0, Text *_1, int flag1, int _2, Rune *_3, int _4)
391 {
392 	USED(_0);
393 	USED(_1);
394 	USED(_2);
395 	USED(_3);
396 	USED(_4);
397 
398 	if(et->col==nil || et->w == nil)
399 		return;
400 	if(flag1 || et->w->body.file->ntext>1 || winclean(et->w, FALSE))
401 		colclose(et->col, et->w, TRUE);
402 }
403 
404 void
405 sort(Text *et, Text *_0, Text *_1, int _2, int _3, Rune *_4, int _5)
406 {
407 	USED(_0);
408 	USED(_1);
409 	USED(_2);
410 	USED(_3);
411 	USED(_4);
412 	USED(_5);
413 
414 	if(et->col)
415 		colsort(et->col);
416 }
417 
418 uint
419 seqof(Window *w, int isundo)
420 {
421 	/* if it's undo, see who changed with us */
422 	if(isundo)
423 		return w->body.file->seq;
424 	/* if it's redo, see who we'll be sync'ed up with */
425 	return fileredoseq(w->body.file);
426 }
427 
428 void
429 undo(Text *et, Text *_0, Text *_1, int flag1, int _2, Rune *_3, int _4)
430 {
431 	int i, j;
432 	Column *c;
433 	Window *w;
434 	uint seq;
435 
436 	USED(_0);
437 	USED(_1);
438 	USED(_2);
439 	USED(_3);
440 	USED(_4);
441 
442 	if(et==nil || et->w== nil)
443 		return;
444 	seq = seqof(et->w, flag1);
445 	if(seq == 0){
446 		/* nothing to undo */
447 		return;
448 	}
449 	/*
450 	 * Undo the executing window first. Its display will update. other windows
451 	 * in the same file will not call show() and jump to a different location in the file.
452 	 * Simultaneous changes to other files will be chaotic, however.
453 	 */
454 	winundo(et->w, flag1);
455 	for(i=0; i<row.ncol; i++){
456 		c = row.col[i];
457 		for(j=0; j<c->nw; j++){
458 			w = c->w[j];
459 			if(w == et->w)
460 				continue;
461 			if(seqof(w, flag1) == seq)
462 				winundo(w, flag1);
463 		}
464 	}
465 }
466 
467 char*
468 getname(Text *t, Text *argt, Rune *arg, int narg, int isput)
469 {
470 	char *s;
471 	Rune *r;
472 	int i, n, promote;
473 	Runestr dir;
474 
475 	getarg(argt, FALSE, TRUE, &r, &n);
476 	promote = FALSE;
477 	if(r == nil)
478 		promote = TRUE;
479 	else if(isput){
480 		/* if are doing a Put, want to synthesize name even for non-existent file */
481 		/* best guess is that file name doesn't contain a slash */
482 		promote = TRUE;
483 		for(i=0; i<n; i++)
484 			if(r[i] == '/'){
485 				promote = FALSE;
486 				break;
487 			}
488 		if(promote){
489 			t = argt;
490 			arg = r;
491 			narg = n;
492 		}
493 	}
494 	if(promote){
495 		n = narg;
496 		if(n <= 0){
497 			s = runetobyte(t->file->name, t->file->nname);
498 			return s;
499 		}
500 		/* prefix with directory name if necessary */
501 		dir.r = nil;
502 		dir.nr = 0;
503 		if(n>0 && arg[0]!='/'){
504 			dir = dirname(t, nil, 0);
505 			if(dir.nr==1 && dir.r[0]=='.'){	/* sigh */
506 				free(dir.r);
507 				dir.r = nil;
508 				dir.nr = 0;
509 			}
510 		}
511 		if(dir.r){
512 			r = runemalloc(dir.nr+n+1);
513 			runemove(r, dir.r, dir.nr);
514 			free(dir.r);
515 			if(dir.nr>0 && r[dir.nr]!='/' && n>0 && arg[0]!='/')
516 				r[dir.nr++] = '/';
517 			runemove(r+dir.nr, arg, n);
518 			n += dir.nr;
519 		}else{
520 			r = runemalloc(n+1);
521 			runemove(r, arg, n);
522 		}
523 	}
524 	s = runetobyte(r, n);
525 	free(r);
526 	if(strlen(s) == 0){
527 		free(s);
528 		s = nil;
529 	}
530 	return s;
531 }
532 
533 void
534 zeroxx(Text *et, Text *t, Text *_1, int _2, int _3, Rune *_4, int _5)
535 {
536 	Window *nw;
537 	int c, locked;
538 
539 	USED(_1);
540 	USED(_2);
541 	USED(_3);
542 	USED(_4);
543 	USED(_5);
544 
545 	locked = FALSE;
546 	if(t!=nil && t->w!=nil && t->w!=et->w){
547 		locked = TRUE;
548 		c = 'M';
549 		if(et->w)
550 			c = et->w->owner;
551 		winlock(t->w, c);
552 	}
553 	if(t == nil)
554 		t = et;
555 	if(t==nil || t->w==nil)
556 		return;
557 	t = &t->w->body;
558 	if(t->w->isdir)
559 		warning(nil, "%.*S is a directory; Zerox illegal\n", t->file->nname, t->file->name);
560 	else{
561 		nw = coladd(t->w->col, nil, t->w, -1);
562 		/* ugly: fix locks so w->unlock works */
563 		winlock1(nw, t->w->owner);
564 	}
565 	if(locked)
566 		winunlock(t->w);
567 }
568 
569 void
570 get(Text *et, Text *t, Text *argt, int flag1, int _0, Rune *arg, int narg)
571 {
572 	char *name;
573 	Rune *r;
574 	int i, n, dirty, samename, isdir;
575 	Window *w;
576 	Text *u;
577 	Dir *d;
578 
579 	USED(_0);
580 
581 	if(flag1)
582 		if(et==nil || et->w==nil)
583 			return;
584 	if(!et->w->isdir && (et->w->body.file->b.nc>0 && !winclean(et->w, TRUE)))
585 		return;
586 	w = et->w;
587 	t = &w->body;
588 	name = getname(t, argt, arg, narg, FALSE);
589 	if(name == nil){
590 		warning(nil, "no file name\n");
591 		return;
592 	}
593 	if(t->file->ntext>1){
594 		d = dirstat(name);
595 		isdir = (d!=nil && (d->qid.type & QTDIR));
596 		free(d);
597 		if(isdir){
598 			warning(nil, "%s is a directory; can't read with multiple windows on it\n", name);
599 			return;
600 		}
601 	}
602 	r = bytetorune(name, &n);
603 	for(i=0; i<t->file->ntext; i++){
604 		u = t->file->text[i];
605 		/* second and subsequent calls with zero an already empty buffer, but OK */
606 		textreset(u);
607 		windirfree(u->w);
608 	}
609 	samename = runeeq(r, n, t->file->name, t->file->nname);
610 	textload(t, 0, name, samename);
611 	if(samename){
612 		t->file->mod = FALSE;
613 		dirty = FALSE;
614 	}else{
615 		t->file->mod = TRUE;
616 		dirty = TRUE;
617 	}
618 	for(i=0; i<t->file->ntext; i++)
619 		t->file->text[i]->w->dirty = dirty;
620 	free(name);
621 	free(r);
622 	winsettag(w);
623 	t->file->unread = FALSE;
624 	for(i=0; i<t->file->ntext; i++){
625 		u = t->file->text[i];
626 		textsetselect(&u->w->tag, u->w->tag.file->b.nc, u->w->tag.file->b.nc);
627 		textscrdraw(u);
628 	}
629 }
630 
631 void
632 putfile(File *f, int q0, int q1, Rune *namer, int nname)
633 {
634 	uint n, m;
635 	Rune *r;
636 	char *s, *name;
637 	int i, fd, q;
638 	Dir *d, *d1;
639 	Window *w;
640 	int isapp;
641 
642 	w = f->curtext->w;
643 	name = runetobyte(namer, nname);
644 	d = dirstat(name);
645 	if(d!=nil && runeeq(namer, nname, f->name, f->nname)){
646 		/* f->mtime+1 because when talking over NFS it's often off by a second */
647 		if(f->dev!=d->dev || f->qidpath!=d->qid.path || abs(f->mtime-d->mtime) > 1){
648 			if(f->unread)
649 				warning(nil, "%s not written; file already exists\n", name);
650 			else
651 				warning(nil, "%s modified%s%s since last read\n\twas %t; now %t\n", name, d->muid[0]?" by ":"", d->muid, f->mtime, d->mtime);
652 			f->dev = d->dev;
653 			f->qidpath = d->qid.path;
654 			f->mtime = d->mtime;
655 			goto Rescue1;
656 		}
657 	}
658 	fd = create(name, OWRITE, 0666);
659 	if(fd < 0){
660 		warning(nil, "can't create file %s: %r\n", name);
661 		goto Rescue1;
662 	}
663 	r = fbufalloc();
664 	s = fbufalloc();
665 	free(d);
666 	d = dirfstat(fd);
667 	isapp = (d!=nil && d->length>0 && (d->qid.type&QTAPPEND));
668 	if(isapp){
669 		warning(nil, "%s not written; file is append only\n", name);
670 		goto Rescue2;
671 	}
672 
673 	for(q=q0; q<q1; q+=n){
674 		n = q1 - q;
675 		if(n > BUFSIZE/UTFmax)
676 			n = BUFSIZE/UTFmax;
677 		bufread(&f->b, q, r, n);
678 		m = snprint(s, BUFSIZE+1, "%.*S", n, r);
679 		if(write(fd, s, m) != m){
680 			warning(nil, "can't write file %s: %r\n", name);
681 			goto Rescue2;
682 		}
683 	}
684 	if(runeeq(namer, nname, f->name, f->nname)){
685 		if(q0!=0 || q1!=f->b.nc){
686 			f->mod = TRUE;
687 			w->dirty = TRUE;
688 			f->unread = TRUE;
689 		}else{
690 			// In case the file is on NFS, reopen the fd
691 			// before dirfstat to cause the attribute cache
692 			// to be updated (otherwise the mtime in the
693 			// dirfstat below will be stale and not match
694 			// what NFS sees).  The file is already written,
695 			// so this should be a no-op when not on NFS.
696 			// Opening for OWRITE (but no truncation)
697 			// in case we don't have read permission.
698 			// (The create above worked, so we probably
699 			// still have write permission.)
700 			close(fd);
701 			fd = open(name, OWRITE);
702 
703 			d1 = dirfstat(fd);
704 			if(d1 != nil){
705 				free(d);
706 				d = d1;
707 			}
708 			f->qidpath = d->qid.path;
709 			f->dev = d->dev;
710 			f->mtime = d->mtime;
711 			f->mod = FALSE;
712 			w->dirty = FALSE;
713 			f->unread = FALSE;
714 		}
715 		for(i=0; i<f->ntext; i++){
716 			f->text[i]->w->putseq = f->seq;
717 			f->text[i]->w->dirty = w->dirty;
718 		}
719 	}
720 	fbuffree(s);
721 	fbuffree(r);
722 	free(d);
723 	free(namer);
724 	free(name);
725 	close(fd);
726 	winsettag(w);
727 	return;
728 
729     Rescue2:
730 	fbuffree(s);
731 	fbuffree(r);
732 	close(fd);
733 	/* fall through */
734 
735     Rescue1:
736 	free(d);
737 	free(namer);
738 	free(name);
739 }
740 
741 void
742 put(Text *et, Text *_0, Text *argt, int _1, int _2, Rune *arg, int narg)
743 {
744 	int nname;
745 	Rune  *namer;
746 	Window *w;
747 	File *f;
748 	char *name;
749 
750 	USED(_0);
751 	USED(_1);
752 	USED(_2);
753 
754 	if(et==nil || et->w==nil || et->w->isdir)
755 		return;
756 	w = et->w;
757 	f = w->body.file;
758 	name = getname(&w->body, argt, arg, narg, TRUE);
759 	if(name == nil){
760 		warning(nil, "no file name\n");
761 		return;
762 	}
763 	namer = bytetorune(name, &nname);
764 	putfile(f, 0, f->b.nc, namer, nname);
765 	free(name);
766 }
767 
768 void
769 dump(Text *_0, Text *_1, Text *argt, int isdump, int _2, Rune *arg, int narg)
770 {
771 	char *name;
772 
773 	USED(_0);
774 	USED(_1);
775 	USED(_2);
776 
777 	if(narg)
778 		name = runetobyte(arg, narg);
779 	else
780 		getbytearg(argt, FALSE, TRUE, &name);
781 	if(isdump)
782 		rowdump(&row, name);
783 	else
784 		rowload(&row, name, FALSE);
785 	free(name);
786 }
787 
788 void
789 cut(Text *et, Text *t, Text *_0, int dosnarf, int docut, Rune *_2, int _3)
790 {
791 	uint q0, q1, n, locked, c;
792 	Rune *r;
793 
794 	USED(_0);
795 	USED(_2);
796 	USED(_3);
797 
798 	/*
799 	 * if not executing a mouse chord (et != t) and snarfing (dosnarf)
800 	 * and executed Cut or Snarf in window tag (et->w != nil),
801 	 * then use the window body selection or the tag selection
802 	 * or do nothing at all.
803 	 */
804 	if(et!=t && dosnarf && et->w!=nil){
805 		if(et->w->body.q1>et->w->body.q0){
806 			t = &et->w->body;
807 			if(docut)
808 				filemark(t->file);	/* seq has been incremented by execute */
809 		}else if(et->w->tag.q1>et->w->tag.q0)
810 			t = &et->w->tag;
811 		else
812 			t = nil;
813 	}
814 	if(t == nil)	/* no selection */
815 		return;
816 
817 	locked = FALSE;
818 	if(t->w!=nil && et->w!=t->w){
819 		locked = TRUE;
820 		c = 'M';
821 		if(et->w)
822 			c = et->w->owner;
823 		winlock(t->w, c);
824 	}
825 	if(t->q0 == t->q1){
826 		if(locked)
827 			winunlock(t->w);
828 		return;
829 	}
830 	if(dosnarf){
831 		q0 = t->q0;
832 		q1 = t->q1;
833 		bufdelete(&snarfbuf, 0, snarfbuf.nc);
834 		r = fbufalloc();
835 		while(q0 < q1){
836 			n = q1 - q0;
837 			if(n > RBUFSIZE)
838 				n = RBUFSIZE;
839 			bufread(&t->file->b, q0, r, n);
840 			bufinsert(&snarfbuf, snarfbuf.nc, r, n);
841 			q0 += n;
842 		}
843 		fbuffree(r);
844 		acmeputsnarf();
845 	}
846 	if(docut){
847 		textdelete(t, t->q0, t->q1, TRUE);
848 		textsetselect(t, t->q0, t->q0);
849 		if(t->w){
850 			textscrdraw(t);
851 			winsettag(t->w);
852 		}
853 	}else if(dosnarf)	/* Snarf command */
854 		argtext = t;
855 	if(locked)
856 		winunlock(t->w);
857 }
858 
859 void
860 paste(Text *et, Text *t, Text *_0, int selectall, int tobody, Rune *_1, int _2)
861 {
862 	int c;
863 	uint q, q0, q1, n;
864 	Rune *r;
865 
866 	USED(_0);
867 	USED(_1);
868 	USED(_2);
869 
870 	/* if(tobody), use body of executing window  (Paste or Send command) */
871 	if(tobody && et!=nil && et->w!=nil){
872 		t = &et->w->body;
873 		filemark(t->file);	/* seq has been incremented by execute */
874 	}
875 	if(t == nil)
876 		return;
877 
878 	acmegetsnarf();
879 	if(t==nil || snarfbuf.nc==0)
880 		return;
881 	if(t->w!=nil && et->w!=t->w){
882 		c = 'M';
883 		if(et->w)
884 			c = et->w->owner;
885 		winlock(t->w, c);
886 	}
887 	cut(t, t, nil, FALSE, TRUE, nil, 0);
888 	q = 0;
889 	q0 = t->q0;
890 	q1 = t->q0+snarfbuf.nc;
891 	r = fbufalloc();
892 	while(q0 < q1){
893 		n = q1 - q0;
894 		if(n > RBUFSIZE)
895 			n = RBUFSIZE;
896 		if(r == nil)
897 			r = runemalloc(n);
898 		bufread(&snarfbuf, q, r, n);
899 		textinsert(t, q0, r, n, TRUE);
900 		q += n;
901 		q0 += n;
902 	}
903 	fbuffree(r);
904 	if(selectall)
905 		textsetselect(t, t->q0, q1);
906 	else
907 		textsetselect(t, q1, q1);
908 	if(t->w){
909 		textscrdraw(t);
910 		winsettag(t->w);
911 	}
912 	if(t->w!=nil && et->w!=t->w)
913 		winunlock(t->w);
914 }
915 
916 void
917 look(Text *et, Text *t, Text *argt, int _0, int _1, Rune *arg, int narg)
918 {
919 	Rune *r;
920 	int n;
921 
922 	USED(_0);
923 	USED(_1);
924 
925 	if(et && et->w){
926 		t = &et->w->body;
927 		if(narg > 0){
928 			search(t, arg, narg);
929 			return;
930 		}
931 		getarg(argt, FALSE, FALSE, &r, &n);
932 		if(r == nil){
933 			n = t->q1-t->q0;
934 			r = runemalloc(n);
935 			bufread(&t->file->b, t->q0, r, n);
936 		}
937 		search(t, r, n);
938 		free(r);
939 	}
940 }
941 
942 static Rune Lnl[] = { '\n', 0 };
943 
944 void
945 sendx(Text *et, Text *t, Text *_0, int _1, int _2, Rune *_3, int _4)
946 {
947 	USED(_0);
948 	USED(_1);
949 	USED(_2);
950 	USED(_3);
951 	USED(_4);
952 
953 	if(et->w==nil)
954 		return;
955 	t = &et->w->body;
956 	if(t->q0 != t->q1)
957 		cut(t, t, nil, TRUE, FALSE, nil, 0);
958 	textsetselect(t, t->file->b.nc, t->file->b.nc);
959 	paste(t, t, nil, TRUE, TRUE, nil, 0);
960 	if(textreadc(t, t->file->b.nc-1) != '\n'){
961 		textinsert(t, t->file->b.nc, Lnl, 1, TRUE);
962 		textsetselect(t, t->file->b.nc, t->file->b.nc);
963 	}
964 	t->iq1 = t->q1;
965 	textshow(t, t->q1, t->q1, 1);
966 }
967 
968 void
969 edit(Text *et, Text *_0, Text *argt, int _1, int _2, Rune *arg, int narg)
970 {
971 	Rune *r;
972 	int len;
973 
974 	USED(_0);
975 	USED(_1);
976 	USED(_2);
977 
978 	if(et == nil)
979 		return;
980 	getarg(argt, FALSE, TRUE, &r, &len);
981 	seq++;
982 	if(r != nil){
983 		editcmd(et, r, len);
984 		free(r);
985 	}else
986 		editcmd(et, arg, narg);
987 }
988 
989 void
990 xexit(Text *et, Text *_0, Text *_1, int _2, int _3, Rune *_4, int _5)
991 {
992 	USED(et);
993 	USED(_0);
994 	USED(_1);
995 	USED(_2);
996 	USED(_3);
997 	USED(_4);
998 	USED(_5);
999 
1000 	if(rowclean(&row)){
1001 		sendul(cexit, 0);
1002 		threadexits(nil);
1003 	}
1004 }
1005 
1006 void
1007 putall(Text *et, Text *_0, Text *_1, int _2, int _3, Rune *_4, int _5)
1008 {
1009 	int i, j, e;
1010 	Window *w;
1011 	Column *c;
1012 	char *a;
1013 
1014 	USED(et);
1015 	USED(_0);
1016 	USED(_1);
1017 	USED(_2);
1018 	USED(_3);
1019 	USED(_4);
1020 	USED(_5);
1021 
1022 	for(i=0; i<row.ncol; i++){
1023 		c = row.col[i];
1024 		for(j=0; j<c->nw; j++){
1025 			w = c->w[j];
1026 			if(w->isscratch || w->isdir || w->body.file->nname==0)
1027 				continue;
1028 			if(w->nopen[QWevent] > 0)
1029 				continue;
1030 			a = runetobyte(w->body.file->name, w->body.file->nname);
1031 			e = access(a, 0);
1032 			if(w->body.file->mod || w->body.ncache)
1033 				if(e < 0)
1034 					warning(nil, "no auto-Put of %s: %r\n", a);
1035 				else{
1036 					wincommit(w, &w->body);
1037 					put(&w->body, nil, nil, XXX, XXX, nil, 0);
1038 				}
1039 			free(a);
1040 		}
1041 	}
1042 }
1043 
1044 
1045 void
1046 id(Text *et, Text *_0, Text *_1, int _2, int _3, Rune *_4, int _5)
1047 {
1048 	USED(_0);
1049 	USED(_1);
1050 	USED(_2);
1051 	USED(_3);
1052 	USED(_4);
1053 	USED(_5);
1054 
1055 	if(et && et->w)
1056 		warning(nil, "/mnt/acme/%d/\n", et->w->id);
1057 }
1058 
1059 void
1060 local(Text *et, Text *_0, Text *argt, int _1, int _2, Rune *arg, int narg)
1061 {
1062 	char *a, *aa;
1063 	Runestr dir;
1064 
1065 	USED(_0);
1066 	USED(_1);
1067 	USED(_2);
1068 
1069 	aa = getbytearg(argt, TRUE, TRUE, &a);
1070 
1071 	dir = dirname(et, nil, 0);
1072 	if(dir.nr==1 && dir.r[0]=='.'){	/* sigh */
1073 		free(dir.r);
1074 		dir.r = nil;
1075 		dir.nr = 0;
1076 	}
1077 	run(nil, runetobyte(arg, narg), dir.r, dir.nr, FALSE, aa, a, FALSE);
1078 }
1079 
1080 void
1081 xkill(Text *_0, Text *_1, Text *argt, int _2, int _3, Rune *arg, int narg)
1082 {
1083 	Rune *a, *cmd, *r;
1084 	int na;
1085 
1086 	USED(_0);
1087 	USED(_1);
1088 	USED(_2);
1089 	USED(_3);
1090 
1091 	getarg(argt, FALSE, FALSE, &r, &na);
1092 	if(r)
1093 		xkill(nil, nil, nil, 0, 0, r, na);
1094 	/* loop condition: *arg is not a blank */
1095 	for(;;){
1096 		a = findbl(arg, narg, &na);
1097 		if(a == arg)
1098 			break;
1099 		cmd = runemalloc(narg-na+1);
1100 		runemove(cmd, arg, narg-na);
1101 		sendp(ckill, cmd);
1102 		arg = skipbl(a, na, &narg);
1103 	}
1104 }
1105 
1106 static Rune Lfix[] = { 'f', 'i', 'x', 0 };
1107 static Rune Lvar[] = { 'v', 'a', 'r', 0 };
1108 
1109 void
1110 fontx(Text *et, Text *t, Text *argt, int _0, int _1, Rune *arg, int narg)
1111 {
1112 	Rune *a, *r, *flag, *file;
1113 	int na, nf;
1114 	char *aa;
1115 	Reffont *newfont;
1116 	Dirlist *dp;
1117 	int i, fix;
1118 
1119 	USED(_0);
1120 	USED(_1);
1121 
1122 	if(et==nil || et->w==nil)
1123 		return;
1124 	t = &et->w->body;
1125 	flag = nil;
1126 	file = nil;
1127 	/* loop condition: *arg is not a blank */
1128 	nf = 0;
1129 	for(;;){
1130 		a = findbl(arg, narg, &na);
1131 		if(a == arg)
1132 			break;
1133 		r = runemalloc(narg-na+1);
1134 		runemove(r, arg, narg-na);
1135 		if(runeeq(r, narg-na, Lfix, 3) || runeeq(r, narg-na, Lvar, 3)){
1136 			free(flag);
1137 			flag = r;
1138 		}else{
1139 			free(file);
1140 			file = r;
1141 			nf = narg-na;
1142 		}
1143 		arg = skipbl(a, na, &narg);
1144 	}
1145 	getarg(argt, FALSE, TRUE, &r, &na);
1146 	if(r)
1147 		if(runeeq(r, na, Lfix, 3) || runeeq(r, na, Lvar, 3)){
1148 			free(flag);
1149 			flag = r;
1150 		}else{
1151 			free(file);
1152 			file = r;
1153 			nf = na;
1154 		}
1155 	fix = 1;
1156 	if(flag)
1157 		fix = runeeq(flag, runestrlen(flag), Lfix, 3);
1158 	else if(file == nil){
1159 		newfont = rfget(FALSE, FALSE, FALSE, nil);
1160 		if(newfont)
1161 			fix = strcmp(newfont->f->name, t->fr.font->name)==0;
1162 	}
1163 	if(file){
1164 		aa = runetobyte(file, nf);
1165 		newfont = rfget(fix, flag!=nil, FALSE, aa);
1166 		free(aa);
1167 	}else
1168 		newfont = rfget(fix, FALSE, FALSE, nil);
1169 	if(newfont){
1170 		draw(screen, t->w->r, textcols[BACK], nil, ZP);
1171 		rfclose(t->reffont);
1172 		t->reffont = newfont;
1173 		t->fr.font = newfont->f;
1174 		frinittick(&t->fr);
1175 		if(t->w->isdir){
1176 			t->all.min.x++;	/* force recolumnation; disgusting! */
1177 			for(i=0; i<t->w->ndl; i++){
1178 				dp = t->w->dlp[i];
1179 				aa = runetobyte(dp->r, dp->nr);
1180 				dp->wid = stringwidth(newfont->f, aa);
1181 				free(aa);
1182 			}
1183 		}
1184 		/* avoid shrinking of window due to quantization */
1185 		colgrow(t->w->col, t->w, -1);
1186 	}
1187 	free(file);
1188 	free(flag);
1189 }
1190 
1191 void
1192 incl(Text *et, Text *_0, Text *argt, int _1, int _2, Rune *arg, int narg)
1193 {
1194 	Rune *a, *r;
1195 	Window *w;
1196 	int na, n, len;
1197 
1198 	USED(_0);
1199 	USED(_1);
1200 	USED(_2);
1201 
1202 	if(et==nil || et->w==nil)
1203 		return;
1204 	w = et->w;
1205 	n = 0;
1206 	getarg(argt, FALSE, TRUE, &r, &len);
1207 	if(r){
1208 		n++;
1209 		winaddincl(w, r, len);
1210 	}
1211 	/* loop condition: *arg is not a blank */
1212 	for(;;){
1213 		a = findbl(arg, narg, &na);
1214 		if(a == arg)
1215 			break;
1216 		r = runemalloc(narg-na+1);
1217 		runemove(r, arg, narg-na);
1218 		n++;
1219 		winaddincl(w, r, narg-na);
1220 		arg = skipbl(a, na, &narg);
1221 	}
1222 	if(n==0 && w->nincl){
1223 		for(n=w->nincl; --n>=0; )
1224 			warning(nil, "%S ", w->incl[n]);
1225 		warning(nil, "\n");
1226 	}
1227 }
1228 
1229 static Rune LON[] = { 'O', 'N', 0 };
1230 static Rune LOFF[] = { 'O', 'F', 'F', 0 };
1231 static Rune Lon[] = { 'o', 'n', 0 };
1232 
1233 enum {
1234 	IGlobal = -2,
1235 	IError = -1,
1236 	Ion = 0,
1237 	Ioff = 1
1238 };
1239 
1240 static int
1241 indentval(Rune *s, int n)
1242 {
1243 	if(n < 2)
1244 		return IError;
1245 	if(runestrncmp(s, LON, n) == 0){
1246 		globalautoindent = TRUE;
1247 		warning(nil, "Indent ON\n");
1248 		return IGlobal;
1249 	}
1250 	if(runestrncmp(s, LOFF, n) == 0){
1251 		globalautoindent = FALSE;
1252 		warning(nil, "Indent OFF\n");
1253 		return IGlobal;
1254 	}
1255 	return runestrncmp(s, Lon, n) == 0;
1256 }
1257 
1258 static void
1259 fixindent(Window *w, void *arg)
1260 {
1261 	USED(arg);
1262 	w->autoindent = globalautoindent;
1263 }
1264 
1265 void
1266 indent(Text *et, Text *_0, Text *argt, int _1, int _2, Rune *arg, int narg)
1267 {
1268 	Rune *a, *r;
1269 	Window *w;
1270 	int na, len, autoindent;
1271 
1272 	USED(_0);
1273 	USED(_1);
1274 	USED(_2);
1275 
1276 	w = nil;
1277 	if(et!=nil && et->w!=nil)
1278 		w = et->w;
1279 	autoindent = IError;
1280 	getarg(argt, FALSE, TRUE, &r, &len);
1281 	if(r!=nil && len>0)
1282 		autoindent = indentval(r, len);
1283 	else{
1284 		a = findbl(arg, narg, &na);
1285 		if(a != arg)
1286 			autoindent = indentval(arg, narg-na);
1287 	}
1288 	if(autoindent == IGlobal)
1289 		allwindows(fixindent, nil);
1290 	else if(w != nil && autoindent >= 0)
1291 		w->autoindent = autoindent;
1292 }
1293 
1294 void
1295 tab(Text *et, Text *_0, Text *argt, int _1, int _2, Rune *arg, int narg)
1296 {
1297 	Rune *a, *r;
1298 	Window *w;
1299 	int na, len, tab;
1300 	char *p;
1301 
1302 	USED(_0);
1303 	USED(_1);
1304 	USED(_2);
1305 
1306 	if(et==nil || et->w==nil)
1307 		return;
1308 	w = et->w;
1309 	getarg(argt, FALSE, TRUE, &r, &len);
1310 	tab = 0;
1311 	if(r!=nil && len>0){
1312 		p = runetobyte(r, len);
1313 		if('0'<=p[0] && p[0]<='9')
1314 			tab = atoi(p);
1315 		free(p);
1316 	}else{
1317 		a = findbl(arg, narg, &na);
1318 		if(a != arg){
1319 			p = runetobyte(arg, narg-na);
1320 			if('0'<=p[0] && p[0]<='9')
1321 				tab = atoi(p);
1322 			free(p);
1323 		}
1324 	}
1325 	if(tab > 0){
1326 		if(w->body.tabstop != tab){
1327 			w->body.tabstop = tab;
1328 			winresize(w, w->r, FALSE, TRUE);
1329 		}
1330 	}else
1331 		warning(nil, "%.*S: Tab %d\n", w->body.file->nname, w->body.file->name, w->body.tabstop);
1332 }
1333 
1334 void
1335 runproc(void *argvp)
1336 {
1337 	/* args: */
1338 		Window *win;
1339 		char *s;
1340 		Rune *rdir;
1341 		int ndir;
1342 		int newns;
1343 		char *argaddr;
1344 		char *arg;
1345 		Command *c;
1346 		Channel *cpid;
1347 		int iseditcmd;
1348 	/* end of args */
1349 	char *e, *t, *name, *filename, *dir, **av, *news;
1350 	Rune r, **incl;
1351 	int ac, w, inarg, i, n, fd, nincl, winid;
1352 	int sfd[3];
1353 	int pipechar;
1354 	char buf[512];
1355 	int olddir;
1356 	int ret;
1357 	/*static void *parg[2]; */
1358 	char *rcarg[4];
1359 	void **argv;
1360 	CFsys *fs;
1361 
1362 	threadsetname("runproc");
1363 
1364 	argv = argvp;
1365 	win = argv[0];
1366 	s = argv[1];
1367 	rdir = argv[2];
1368 	ndir = (uintptr)argv[3];
1369 	newns = (uintptr)argv[4];
1370 	argaddr = argv[5];
1371 	arg = argv[6];
1372 	c = argv[7];
1373 	cpid = argv[8];
1374 	iseditcmd = (uintptr)argv[9];
1375 	free(argv);
1376 
1377 	t = s;
1378 	while(*t==' ' || *t=='\n' || *t=='\t')
1379 		t++;
1380 	for(e=t; *e; e++)
1381 		if(*e==' ' || *e=='\n' || *e=='\t' )
1382 			break;
1383 	name = emalloc((e-t)+2);
1384 	memmove(name, t, e-t);
1385 	name[e-t] = 0;
1386 	e = utfrrune(name, '/');
1387 	if(e)
1388 		memmove(name, e+1, strlen(e+1)+1);	/* strcpy but overlaps */
1389 	strcat(name, " ");	/* add blank here for ease in waittask */
1390 	c->name = bytetorune(name, &c->nname);
1391 	free(name);
1392 	pipechar = 0;
1393 	if(*t=='<' || *t=='|' || *t=='>')
1394 		pipechar = *t++;
1395 	c->iseditcmd = iseditcmd;
1396 	c->text = s;
1397 	if(newns){
1398 		nincl = 0;
1399 		incl = nil;
1400 		if(win){
1401 			filename = smprint("%.*S", win->body.file->nname, win->body.file->name);
1402 			nincl = win->nincl;
1403 			if(nincl > 0){
1404 				incl = emalloc(nincl*sizeof(Rune*));
1405 				for(i=0; i<nincl; i++){
1406 					n = runestrlen(win->incl[i]);
1407 					incl[i] = runemalloc(n+1);
1408 					runemove(incl[i], win->incl[i], n);
1409 				}
1410 			}
1411 			winid = win->id;
1412 		}else{
1413 			filename = nil;
1414 			winid = 0;
1415 			if(activewin)
1416 				winid = activewin->id;
1417 		}
1418 		rfork(RFNAMEG|RFENVG|RFFDG|RFNOTEG);
1419 		sprint(buf, "%d", winid);
1420 		putenv("winid", buf);
1421 
1422 		if(filename){
1423 			putenv("%", filename);
1424 			free(filename);
1425 		}
1426 		c->md = fsysmount(rdir, ndir, incl, nincl);
1427 		if(c->md == nil){
1428 			fprint(2, "child: can't allocate mntdir: %r\n");
1429 			threadexits("fsysmount");
1430 		}
1431 		sprint(buf, "%d", c->md->id);
1432 		if((fs = nsmount("acme", buf)) == nil){
1433 			fprint(2, "child: can't mount acme: %r\n");
1434 			fsysdelid(c->md);
1435 			c->md = nil;
1436 			threadexits("nsmount");
1437 		}
1438 		if(winid>0 && (pipechar=='|' || pipechar=='>')){
1439 			sprint(buf, "%d/rdsel", winid);
1440 			sfd[0] = fsopenfd(fs, buf, OREAD);
1441 		}else
1442 			sfd[0] = open("/dev/null", OREAD);
1443 		if((winid>0 || iseditcmd) && (pipechar=='|' || pipechar=='<')){
1444 			if(iseditcmd){
1445 				if(winid > 0)
1446 					sprint(buf, "%d/editout", winid);
1447 				else
1448 					sprint(buf, "editout");
1449 			}else
1450 				sprint(buf, "%d/wrsel", winid);
1451 			sfd[1] = fsopenfd(fs, buf, OWRITE);
1452 			sfd[2] = fsopenfd(fs, "cons", OWRITE);
1453 		}else{
1454 			sfd[1] = fsopenfd(fs, "cons", OWRITE);
1455 			sfd[2] = sfd[1];
1456 		}
1457 		fsunmount(fs);
1458 	}else{
1459 		rfork(RFFDG|RFNOTEG);
1460 		fsysclose();
1461 		sfd[0] = open("/dev/null", OREAD);
1462 		sfd[1] = open("/dev/null", OWRITE);
1463 		sfd[2] = dup(erroutfd, -1);
1464 	}
1465 	if(win)
1466 		winclose(win);
1467 
1468 	if(argaddr)
1469 		putenv("acmeaddr", argaddr);
1470 	if(strlen(t) > sizeof buf-10)	/* may need to print into stack */
1471 		goto Hard;
1472 	inarg = FALSE;
1473 	for(e=t; *e; e+=w){
1474 		w = chartorune(&r, e);
1475 		if(r==' ' || r=='\t')
1476 			continue;
1477 		if(r < ' ')
1478 			goto Hard;
1479 		if(utfrune("#;&|^$=`'{}()<>[]*?^~`", r))
1480 			goto Hard;
1481 		inarg = TRUE;
1482 	}
1483 	if(!inarg)
1484 		goto Fail;
1485 
1486 	ac = 0;
1487 	av = nil;
1488 	inarg = FALSE;
1489 	for(e=t; *e; e+=w){
1490 		w = chartorune(&r, e);
1491 		if(r==' ' || r=='\t'){
1492 			inarg = FALSE;
1493 			*e = 0;
1494 			continue;
1495 		}
1496 		if(!inarg){
1497 			inarg = TRUE;
1498 			av = realloc(av, (ac+1)*sizeof(char**));
1499 			av[ac++] = e;
1500 		}
1501 	}
1502 	av = realloc(av, (ac+2)*sizeof(char**));
1503 	av[ac++] = arg;
1504 	av[ac] = nil;
1505 	c->av = av;
1506 
1507 	/*
1508 	 * clumsy -- we're not running in a separate thread
1509 	 * so we have to save the current directory and put
1510 	 * it back when we're done.  if this gets to be a regular
1511 	 * thing we could change threadexec to take a directory too.
1512 	 */
1513 	olddir = -1;
1514 	if(rdir != nil){
1515 		olddir = open(".", OREAD);
1516 		dir = runetobyte(rdir, ndir);
1517 		chdir(dir);	/* ignore error: probably app. window */
1518 		free(dir);
1519 	}
1520 	ret = threadspawn(sfd, av[0], av);
1521 	if(olddir >= 0){
1522 		fchdir(olddir);
1523 		close(olddir);
1524 	}
1525 	if(ret >= 0){
1526 		if(cpid)
1527 			sendul(cpid, ret);
1528 		threadexits("");
1529 	}
1530 /* libthread uses execvp so no need to do this */
1531 #if 0
1532 	e = av[0];
1533 	if(e[0]=='/' || (e[0]=='.' && e[1]=='/'))
1534 		goto Fail;
1535 	if(cputype){
1536 		sprint(buf, "%s/%s", cputype, av[0]);
1537 		procexec(cpid, sfd, buf, av);
1538 	}
1539 	sprint(buf, "/bin/%s", av[0]);
1540 	procexec(cpid, sfd, buf, av);
1541 #endif
1542 	goto Fail;
1543 
1544 Hard:
1545 	/*
1546 	 * ugly: set path = (. $cputype /bin)
1547 	 * should honor $path if unusual.
1548 	 */
1549 	if(cputype){
1550 		n = 0;
1551 		memmove(buf+n, ".", 2);
1552 		n += 2;
1553 		i = strlen(cputype)+1;
1554 		memmove(buf+n, cputype, i);
1555 		n += i;
1556 		memmove(buf+n, "/bin", 5);
1557 		n += 5;
1558 		fd = create("/env/path", OWRITE, 0666);
1559 		write(fd, buf, n);
1560 		close(fd);
1561 	}
1562 
1563 	if(arg){
1564 		news = emalloc(strlen(t) + 1 + 1 + strlen(arg) + 1 + 1);
1565 		if(news){
1566 			sprint(news, "%s '%s'", t, arg);	/* BUG: what if quote in arg? */
1567 			free(s);
1568 			t = news;
1569 			c->text = news;
1570 		}
1571 	}
1572 	olddir = -1;
1573 	if(rdir != nil){
1574 		olddir = open(".", OREAD);
1575 		dir = runetobyte(rdir, ndir);
1576 		chdir(dir);	/* ignore error: probably app. window */
1577 		free(dir);
1578 	}
1579 	rcarg[0] = "rc";
1580 	rcarg[1] = "-c";
1581 	rcarg[2] = t;
1582 	rcarg[3] = nil;
1583 	ret = threadspawn(sfd, rcarg[0], rcarg);
1584 	if(olddir >= 0){
1585 		fchdir(olddir);
1586 		close(olddir);
1587 	}
1588 	if(ret >= 0){
1589 		if(cpid)
1590 			sendul(cpid, ret);
1591 		threadexits(nil);
1592 	}
1593 	warning(nil, "exec rc: %r\n");
1594 
1595    Fail:
1596 	/* threadexec hasn't happened, so send a zero */
1597 	close(sfd[0]);
1598 	close(sfd[1]);
1599 	if(sfd[2] != sfd[1])
1600 		close(sfd[2]);
1601 	sendul(cpid, 0);
1602 	threadexits(nil);
1603 }
1604 
1605 void
1606 runwaittask(void *v)
1607 {
1608 	Command *c;
1609 	Channel *cpid;
1610 	void **a;
1611 
1612 	threadsetname("runwaittask");
1613 	a = v;
1614 	c = a[0];
1615 	cpid = a[1];
1616 	free(a);
1617 	do
1618 		c->pid = recvul(cpid);
1619 	while(c->pid == ~0);
1620 	free(c->av);
1621 	if(c->pid != 0)	/* successful exec */
1622 		sendp(ccommand, c);
1623 	else{
1624 		if(c->iseditcmd)
1625 			sendul(cedit, 0);
1626 		free(c->name);
1627 		free(c->text);
1628 		free(c);
1629 	}
1630 	chanfree(cpid);
1631 }
1632 
1633 void
1634 run(Window *win, char *s, Rune *rdir, int ndir, int newns, char *argaddr, char *xarg, int iseditcmd)
1635 {
1636 	void **arg;
1637 	Command *c;
1638 	Channel *cpid;
1639 
1640 	if(s == nil)
1641 		return;
1642 
1643 	arg = emalloc(10*sizeof(void*));
1644 	c = emalloc(sizeof *c);
1645 	cpid = chancreate(sizeof(ulong), 0);
1646 	chansetname(cpid, "cpid %s", s);
1647 	arg[0] = win;
1648 	arg[1] = s;
1649 	arg[2] = rdir;
1650 	arg[3] = (void*)(uintptr)ndir;
1651 	arg[4] = (void*)(uintptr)newns;
1652 	arg[5] = argaddr;
1653 	arg[6] = xarg;
1654 	arg[7] = c;
1655 	arg[8] = cpid;
1656 	arg[9] = (void*)(uintptr)iseditcmd;
1657 	threadcreate(runproc, arg, STACK);
1658 	/* mustn't block here because must be ready to answer mount() call in run() */
1659 	arg = emalloc(2*sizeof(void*));
1660 	arg[0] = c;
1661 	arg[1] = cpid;
1662 	threadcreate(runwaittask, arg, STACK);
1663 }