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Date:: Tue Sep 28 17:07:33 2021 UTC
Message:: acme: fix extra print args
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1 #include <u.h>
2 #include <libc.h>
3 #include <bio.h>
4 #include <draw.h>
5 #include <thread.h>
6 #include <cursor.h>
7 #include <mouse.h>
8 #include <keyboard.h>
9 #include <frame.h>
10 #include <fcall.h>
11 #include <plumb.h>
12 #include <libsec.h>
13 #include <9pclient.h>
14 #include "dat.h"
15 #include "fns.h"
16 
17 Buffer	snarfbuf;
18 
19 /*
20  * These functions get called as:
21  *
22  *	fn(et, t, argt, flag1, flag1, flag2, s, n);
23  *
24  * Where the arguments are:
25  *
26  *	et: the Text* in which the executing event (click) occurred
27  *	t: the Text* containing the current selection (Edit, Cut, Snarf, Paste)
28  *	argt: the Text* containing the argument for a 2-1 click.
29  *	e->flag1: from Exectab entry
30  * 	e->flag2: from Exectab entry
31  *	s: the command line remainder (e.g., "x" if executing "Dump x")
32  *	n: length of s  (s is *not* NUL-terminated)
33  */
34 
35 void doabort(Text*, Text*, Text*, int, int, Rune*, int);
36 void	del(Text*, Text*, Text*, int, int, Rune*, int);
37 void	delcol(Text*, Text*, Text*, int, int, Rune*, int);
38 void	dotfiles(Text*, Text*, Text*, int, int, Rune*, int);
39 void	dump(Text*, Text*, Text*, int, int, Rune*, int);
40 void	edit(Text*, Text*, Text*, int, int, Rune*, int);
41 void	xexit(Text*, Text*, Text*, int, int, Rune*, int);
42 void	fontx(Text*, Text*, Text*, int, int, Rune*, int);
43 void	get(Text*, Text*, Text*, int, int, Rune*, int);
44 void	id(Text*, Text*, Text*, int, int, Rune*, int);
45 void	incl(Text*, Text*, Text*, int, int, Rune*, int);
46 void	indent(Text*, Text*, Text*, int, int, Rune*, int);
47 void	xkill(Text*, Text*, Text*, int, int, Rune*, int);
48 void	local(Text*, Text*, Text*, int, int, Rune*, int);
49 void	look(Text*, Text*, Text*, int, int, Rune*, int);
50 void	newcol(Text*, Text*, Text*, int, int, Rune*, int);
51 void	paste(Text*, Text*, Text*, int, int, Rune*, int);
52 void	put(Text*, Text*, Text*, int, int, Rune*, int);
53 void	putall(Text*, Text*, Text*, int, int, Rune*, int);
54 void	sendx(Text*, Text*, Text*, int, int, Rune*, int);
55 void	sort(Text*, Text*, Text*, int, int, Rune*, int);
56 void	tab(Text*, Text*, Text*, int, int, Rune*, int);
57 void	zeroxx(Text*, Text*, Text*, int, int, Rune*, int);
58 
59 typedef struct Exectab Exectab;
60 struct Exectab
61 {
62 	Rune	*name;
63 	void	(*fn)(Text*, Text*, Text*, int, int, Rune*, int);
64 	int		mark;
65 	int		flag1;
66 	int		flag2;
67 };
68 
69 static Rune LAbort[] = { 'A', 'b', 'o', 'r', 't', 0 };
70 static Rune LCut[] = { 'C', 'u', 't', 0 };
71 static Rune LDel[] = { 'D', 'e', 'l', 0 };
72 static Rune LDelcol[] = { 'D', 'e', 'l', 'c', 'o', 'l', 0 };
73 static Rune LDelete[] = { 'D', 'e', 'l', 'e', 't', 'e', 0 };
74 static Rune LDump[] = { 'D', 'u', 'm', 'p', 0 };
75 static Rune LEdit[] = { 'E', 'd', 'i', 't', 0 };
76 static Rune LExit[] = { 'E', 'x', 'i', 't', 0 };
77 static Rune LFont[] = { 'F', 'o', 'n', 't', 0 };
78 static Rune LGet[] = { 'G', 'e', 't', 0 };
79 static Rune LID[] = { 'I', 'D', 0 };
80 static Rune LIncl[] = { 'I', 'n', 'c', 'l', 0 };
81 static Rune LIndent[] = { 'I', 'n', 'd', 'e', 'n', 't', 0 };
82 static Rune LKill[] = { 'K', 'i', 'l', 'l', 0 };
83 static Rune LLoad[] = { 'L', 'o', 'a', 'd', 0 };
84 static Rune LLocal[] = { 'L', 'o', 'c', 'a', 'l', 0 };
85 static Rune LLook[] = { 'L', 'o', 'o', 'k', 0 };
86 static Rune LNew[] = { 'N', 'e', 'w', 0 };
87 static Rune LNewcol[] = { 'N', 'e', 'w', 'c', 'o', 'l', 0 };
88 static Rune LPaste[] = { 'P', 'a', 's', 't', 'e', 0 };
89 static Rune LPut[] = { 'P', 'u', 't', 0 };
90 static Rune LPutall[] = { 'P', 'u', 't', 'a', 'l', 'l', 0 };
91 static Rune LRedo[] = { 'R', 'e', 'd', 'o', 0 };
92 static Rune LSend[] = { 'S', 'e', 'n', 'd', 0 };
93 static Rune LSnarf[] = { 'S', 'n', 'a', 'r', 'f', 0 };
94 static Rune LSort[] = { 'S', 'o', 'r', 't', 0 };
95 static Rune LTab[] = { 'T', 'a', 'b', 0 };
96 static Rune LUndo[] = { 'U', 'n', 'd', 'o', 0 };
97 static Rune LZerox[] = { 'Z', 'e', 'r', 'o', 'x', 0 };
98 
99 Exectab exectab[] = {
100 	{ LAbort,		doabort,	FALSE,	XXX,		XXX,		},
101 	{ LCut,		cut,		TRUE,	TRUE,	TRUE	},
102 	{ LDel,		del,		FALSE,	FALSE,	XXX		},
103 	{ LDelcol,		delcol,	FALSE,	XXX,		XXX		},
104 	{ LDelete,		del,		FALSE,	TRUE,	XXX		},
105 	{ LDump,		dump,	FALSE,	TRUE,	XXX		},
106 	{ LEdit,		edit,		FALSE,	XXX,		XXX		},
107 	{ LExit,		xexit,	FALSE,	XXX,		XXX		},
108 	{ LFont,		fontx,	FALSE,	XXX,		XXX		},
109 	{ LGet,		get,		FALSE,	TRUE,	XXX		},
110 	{ LID,		id,		FALSE,	XXX,		XXX		},
111 	{ LIncl,		incl,		FALSE,	XXX,		XXX		},
112 	{ LIndent,		indent,	FALSE,	XXX,		XXX		},
113 	{ LKill,		xkill,		FALSE,	XXX,		XXX		},
114 	{ LLoad,		dump,	FALSE,	FALSE,	XXX		},
115 	{ LLocal,		local,	FALSE,	XXX,		XXX		},
116 	{ LLook,		look,		FALSE,	XXX,		XXX		},
117 	{ LNew,		new,		FALSE,	XXX,		XXX		},
118 	{ LNewcol,	newcol,	FALSE,	XXX,		XXX		},
119 	{ LPaste,		paste,	TRUE,	TRUE,	XXX		},
120 	{ LPut,		put,		FALSE,	XXX,		XXX		},
121 	{ LPutall,		putall,	FALSE,	XXX,		XXX		},
122 	{ LRedo,		undo,	FALSE,	FALSE,	XXX		},
123 	{ LSend,		sendx,	TRUE,	XXX,		XXX		},
124 	{ LSnarf,		cut,		FALSE,	TRUE,	FALSE	},
125 	{ LSort,		sort,		FALSE,	XXX,		XXX		},
126 	{ LTab,		tab,		FALSE,	XXX,		XXX		},
127 	{ LUndo,		undo,	FALSE,	TRUE,	XXX		},
128 	{ LZerox,		zeroxx,	FALSE,	XXX,		XXX		},
129 	{ nil, 			0,		0,		0,		0		}
130 };
131 
132 Exectab*
133 lookup(Rune *r, int n)
134 {
135 	Exectab *e;
136 	int nr;
137 
138 	r = skipbl(r, n, &n);
139 	if(n == 0)
140 		return nil;
141 	findbl(r, n, &nr);
142 	nr = n-nr;
143 	for(e=exectab; e->name; e++)
144 		if(runeeq(r, nr, e->name, runestrlen(e->name)) == TRUE)
145 			return e;
146 	return nil;
147 }
148 
149 int
150 isexecc(int c)
151 {
152 	if(isfilec(c))
153 		return 1;
154 	return c=='<' || c=='|' || c=='>';
155 }
156 
157 void
158 execute(Text *t, uint aq0, uint aq1, int external, Text *argt)
159 {
160 	uint q0, q1;
161 	Rune *r, *s;
162 	char *b, *a, *aa;
163 	Exectab *e;
164 	int c, n, f;
165 	Runestr dir;
166 
167 	q0 = aq0;
168 	q1 = aq1;
169 	if(q1 == q0){	/* expand to find word (actually file name) */
170 		/* if in selection, choose selection */
171 		if(t->q1>t->q0 && t->q0<=q0 && q0<=t->q1){
172 			q0 = t->q0;
173 			q1 = t->q1;
174 		}else{
175 			while(q1<t->file->b.nc && isexecc(c=textreadc(t, q1)) && c!=':')
176 				q1++;
177 			while(q0>0 && isexecc(c=textreadc(t, q0-1)) && c!=':')
178 				q0--;
179 			if(q1 == q0)
180 				return;
181 		}
182 	}
183 	r = runemalloc(q1-q0);
184 	bufread(&t->file->b, q0, r, q1-q0);
185 	e = lookup(r, q1-q0);
186 	if(!external && t->w!=nil && t->w->nopen[QWevent]>0){
187 		f = 0;
188 		if(e)
189 			f |= 1;
190 		if(q0!=aq0 || q1!=aq1){
191 			bufread(&t->file->b, aq0, r, aq1-aq0);
192 			f |= 2;
193 		}
194 		aa = getbytearg(argt, TRUE, TRUE, &a);
195 		if(a){
196 			if(strlen(a) > EVENTSIZE){	/* too big; too bad */
197 				free(r);
198 				free(aa);
199 				free(a);
200 				warning(nil, "argument string too long\n");
201 				return;
202 			}
203 			f |= 8;
204 		}
205 		c = 'x';
206 		if(t->what == Body)
207 			c = 'X';
208 		n = aq1-aq0;
209 		if(n <= EVENTSIZE)
210 			winevent(t->w, "%c%d %d %d %d %.*S\n", c, aq0, aq1, f, n, n, r);
211 		else
212 			winevent(t->w, "%c%d %d %d 0 \n", c, aq0, aq1, f);
213 		if(q0!=aq0 || q1!=aq1){
214 			n = q1-q0;
215 			bufread(&t->file->b, q0, r, n);
216 			if(n <= EVENTSIZE)
217 				winevent(t->w, "%c%d %d 0 %d %.*S\n", c, q0, q1, n, n, r);
218 			else
219 				winevent(t->w, "%c%d %d 0 0 \n", c, q0, q1);
220 		}
221 		if(a){
222 			winevent(t->w, "%c0 0 0 %d %s\n", c, utflen(a), a);
223 			if(aa)
224 				winevent(t->w, "%c0 0 0 %d %s\n", c, utflen(aa), aa);
225 			else
226 				winevent(t->w, "%c0 0 0 0 \n", c);
227 		}
228 		free(r);
229 		free(aa);
230 		free(a);
231 		return;
232 	}
233 	if(e){
234 		if(e->mark && seltext!=nil)
235 		if(seltext->what == Body){
236 			seq++;
237 			filemark(seltext->w->body.file);
238 		}
239 		s = skipbl(r, q1-q0, &n);
240 		s = findbl(s, n, &n);
241 		s = skipbl(s, n, &n);
242 		(*e->fn)(t, seltext, argt, e->flag1, e->flag2, s, n);
243 		free(r);
244 		return;
245 	}
246 
247 	b = runetobyte(r, q1-q0);
248 	free(r);
249 	dir = dirname(t, nil, 0);
250 	if(dir.nr==1 && dir.r[0]=='.'){	/* sigh */
251 		free(dir.r);
252 		dir.r = nil;
253 		dir.nr = 0;
254 	}
255 	aa = getbytearg(argt, TRUE, TRUE, &a);
256 	if(t->w)
257 		incref(&t->w->ref);
258 	run(t->w, b, dir.r, dir.nr, TRUE, aa, a, FALSE);
259 }
260 
261 char*
262 printarg(Text *argt, uint q0, uint q1)
263 {
264 	char *buf;
265 
266 	if(argt->what!=Body || argt->file->name==nil)
267 		return nil;
268 	buf = emalloc(argt->file->nname+32);
269 	if(q0 == q1)
270 		sprint(buf, "%.*S:#%d", argt->file->nname, argt->file->name, q0);
271 	else
272 		sprint(buf, "%.*S:#%d,#%d", argt->file->nname, argt->file->name, q0, q1);
273 	return buf;
274 }
275 
276 char*
277 getarg(Text *argt, int doaddr, int dofile, Rune **rp, int *nrp)
278 {
279 	int n;
280 	Expand e;
281 	char *a;
282 
283 	*rp = nil;
284 	*nrp = 0;
285 	if(argt == nil)
286 		return nil;
287 	a = nil;
288 	textcommit(argt, TRUE);
289 	if(expand(argt, argt->q0, argt->q1, &e)){
290 		free(e.bname);
291 		if(e.nname && dofile){
292 			e.name = runerealloc(e.name, e.nname+1);
293 			if(doaddr)
294 				a = printarg(argt, e.q0, e.q1);
295 			*rp = e.name;
296 			*nrp = e.nname;
297 			return a;
298 		}
299 		free(e.name);
300 	}else{
301 		e.q0 = argt->q0;
302 		e.q1 = argt->q1;
303 	}
304 	n = e.q1 - e.q0;
305 	*rp = runemalloc(n+1);
306 	bufread(&argt->file->b, e.q0, *rp, n);
307 	if(doaddr)
308 		a = printarg(argt, e.q0, e.q1);
309 	*nrp = n;
310 	return a;
311 }
312 
313 char*
314 getbytearg(Text *argt, int doaddr, int dofile, char **bp)
315 {
316 	Rune *r;
317 	int n;
318 	char *aa;
319 
320 	*bp = nil;
321 	aa = getarg(argt, doaddr, dofile, &r, &n);
322 	if(r == nil)
323 		return nil;
324 	*bp = runetobyte(r, n);
325 	free(r);
326 	return aa;
327 }
328 
329 void
330 doabort(Text *__0, Text *_0, Text *_1, int _2, int _3, Rune *_4, int _5)
331 {
332 	static int n;
333 
334 	USED(__0);
335 	USED(_0);
336 	USED(_1);
337 	USED(_2);
338 	USED(_3);
339 	USED(_4);
340 	USED(_5);
341 
342 	if(n++ == 0)
343 		warning(nil, "executing Abort again will call abort()\n");
344 	else
345 		abort();
346 }
347 
348 void
349 newcol(Text *et, Text *_0, Text *_1, int _2, int _3, Rune *_4, int _5)
350 {
351 	Column *c;
352 	Window *w;
353 
354 	USED(_0);
355 	USED(_1);
356 	USED(_2);
357 	USED(_3);
358 	USED(_4);
359 	USED(_5);
360 
361 	c = rowadd(et->row, nil, -1);
362 	if(c) {
363 		w = coladd(c, nil, nil, -1);
364 		winsettag(w);
365 		xfidlog(w, "new");
366 	}
367 }
368 
369 void
370 delcol(Text *et, Text *_0, Text *_1, int _2, int _3, Rune *_4, int _5)
371 {
372 	int i;
373 	Column *c;
374 	Window *w;
375 
376 	USED(_0);
377 	USED(_1);
378 	USED(_2);
379 	USED(_3);
380 	USED(_4);
381 	USED(_5);
382 
383 	c = et->col;
384 	if(c==nil || colclean(c)==0)
385 		return;
386 	for(i=0; i<c->nw; i++){
387 		w = c->w[i];
388 		if(w->nopen[QWevent]+w->nopen[QWaddr]+w->nopen[QWdata]+w->nopen[QWxdata] > 0){
389 			warning(nil, "can't delete column; %.*S is running an external command\n", w->body.file->nname, w->body.file->name);
390 			return;
391 		}
392 	}
393 	rowclose(et->col->row, et->col, TRUE);
394 }
395 
396 void
397 del(Text *et, Text *_0, Text *_1, int flag1, int _2, Rune *_3, int _4)
398 {
399 	USED(_0);
400 	USED(_1);
401 	USED(_2);
402 	USED(_3);
403 	USED(_4);
404 
405 	if(et->col==nil || et->w == nil)
406 		return;
407 	if(flag1 || et->w->body.file->ntext>1 || winclean(et->w, FALSE))
408 		colclose(et->col, et->w, TRUE);
409 }
410 
411 void
412 sort(Text *et, Text *_0, Text *_1, int _2, int _3, Rune *_4, int _5)
413 {
414 	USED(_0);
415 	USED(_1);
416 	USED(_2);
417 	USED(_3);
418 	USED(_4);
419 	USED(_5);
420 
421 	if(et->col)
422 		colsort(et->col);
423 }
424 
425 uint
426 seqof(Window *w, int isundo)
427 {
428 	/* if it's undo, see who changed with us */
429 	if(isundo)
430 		return w->body.file->seq;
431 	/* if it's redo, see who we'll be sync'ed up with */
432 	return fileredoseq(w->body.file);
433 }
434 
435 void
436 undo(Text *et, Text *_0, Text *_1, int flag1, int _2, Rune *_3, int _4)
437 {
438 	int i, j;
439 	Column *c;
440 	Window *w;
441 	uint seq;
442 
443 	USED(_0);
444 	USED(_1);
445 	USED(_2);
446 	USED(_3);
447 	USED(_4);
448 
449 	if(et==nil || et->w== nil)
450 		return;
451 	seq = seqof(et->w, flag1);
452 	if(seq == 0){
453 		/* nothing to undo */
454 		return;
455 	}
456 	/*
457 	 * Undo the executing window first. Its display will update. other windows
458 	 * in the same file will not call show() and jump to a different location in the file.
459 	 * Simultaneous changes to other files will be chaotic, however.
460 	 */
461 	winundo(et->w, flag1);
462 	for(i=0; i<row.ncol; i++){
463 		c = row.col[i];
464 		for(j=0; j<c->nw; j++){
465 			w = c->w[j];
466 			if(w == et->w)
467 				continue;
468 			if(seqof(w, flag1) == seq)
469 				winundo(w, flag1);
470 		}
471 	}
472 }
473 
474 char*
475 getname(Text *t, Text *argt, Rune *arg, int narg, int isput)
476 {
477 	char *s;
478 	Rune *r;
479 	int i, n, promote;
480 	Runestr dir;
481 
482 	getarg(argt, FALSE, TRUE, &r, &n);
483 	promote = FALSE;
484 	if(r == nil)
485 		promote = TRUE;
486 	else if(isput){
487 		/* if are doing a Put, want to synthesize name even for non-existent file */
488 		/* best guess is that file name doesn't contain a slash */
489 		promote = TRUE;
490 		for(i=0; i<n; i++)
491 			if(r[i] == '/'){
492 				promote = FALSE;
493 				break;
494 			}
495 		if(promote){
496 			t = argt;
497 			arg = r;
498 			narg = n;
499 		}
500 	}
501 	if(promote){
502 		n = narg;
503 		if(n <= 0){
504 			s = runetobyte(t->file->name, t->file->nname);
505 			return s;
506 		}
507 		/* prefix with directory name if necessary */
508 		dir.r = nil;
509 		dir.nr = 0;
510 		if(n>0 && arg[0]!='/'){
511 			dir = dirname(t, nil, 0);
512 			if(dir.nr==1 && dir.r[0]=='.'){	/* sigh */
513 				free(dir.r);
514 				dir.r = nil;
515 				dir.nr = 0;
516 			}
517 		}
518 		if(dir.r){
519 			r = runemalloc(dir.nr+n+1);
520 			runemove(r, dir.r, dir.nr);
521 			free(dir.r);
522 			if(dir.nr>0 && r[dir.nr]!='/' && n>0 && arg[0]!='/')
523 				r[dir.nr++] = '/';
524 			runemove(r+dir.nr, arg, n);
525 			n += dir.nr;
526 		}else{
527 			r = runemalloc(n+1);
528 			runemove(r, arg, n);
529 		}
530 	}
531 	s = runetobyte(r, n);
532 	free(r);
533 	if(strlen(s) == 0){
534 		free(s);
535 		s = nil;
536 	}
537 	return s;
538 }
539 
540 void
541 zeroxx(Text *et, Text *t, Text *_1, int _2, int _3, Rune *_4, int _5)
542 {
543 	Window *nw;
544 	int c, locked;
545 
546 	USED(_1);
547 	USED(_2);
548 	USED(_3);
549 	USED(_4);
550 	USED(_5);
551 
552 	locked = FALSE;
553 	if(t!=nil && t->w!=nil && t->w!=et->w){
554 		locked = TRUE;
555 		c = 'M';
556 		if(et->w)
557 			c = et->w->owner;
558 		winlock(t->w, c);
559 	}
560 	if(t == nil)
561 		t = et;
562 	if(t==nil || t->w==nil)
563 		return;
564 	t = &t->w->body;
565 	if(t->w->isdir)
566 		warning(nil, "%.*S is a directory; Zerox illegal\n", t->file->nname, t->file->name);
567 	else{
568 		nw = coladd(t->w->col, nil, t->w, -1);
569 		/* ugly: fix locks so w->unlock works */
570 		winlock1(nw, t->w->owner);
571 		xfidlog(nw, "zerox");
572 	}
573 	if(locked)
574 		winunlock(t->w);
575 }
576 
577 typedef struct TextAddr TextAddr;
578 struct TextAddr {
579 	long lorigin; // line+rune for origin
580 	long rorigin;
581 	long lq0; // line+rune for q0
582 	long rq0;
583 	long lq1; // line+rune for q1
584 	long rq1;
585 };
586 
587 void
588 get(Text *et, Text *t, Text *argt, int flag1, int _0, Rune *arg, int narg)
589 {
590 	char *name;
591 	Rune *r;
592 	int i, n, dirty, samename, isdir;
593 	TextAddr *addr, *a;
594 	Window *w;
595 	Text *u;
596 	Dir *d;
597 	long q0, q1;
598 
599 	USED(_0);
600 
601 	if(flag1)
602 		if(et==nil || et->w==nil)
603 			return;
604 	if(!et->w->isdir && (et->w->body.file->b.nc>0 && !winclean(et->w, TRUE)))
605 		return;
606 	w = et->w;
607 	t = &w->body;
608 	name = getname(t, argt, arg, narg, FALSE);
609 	if(name == nil){
610 		warning(nil, "no file name\n");
611 		return;
612 	}
613 	if(t->file->ntext>1){
614 		d = dirstat(name);
615 		isdir = (d!=nil && (d->qid.type & QTDIR));
616 		free(d);
617 		if(isdir){
618 			warning(nil, "%s is a directory; can't read with multiple windows on it\n", name);
619 			return;
620 		}
621 	}
622 	addr = emalloc((t->file->ntext)*sizeof(TextAddr));
623 	for(i=0; i<t->file->ntext; i++) {
624 		a = &addr[i];
625 		u = t->file->text[i];
626 		a->lorigin = nlcount(u, 0, u->org, &a->rorigin);
627 		a->lq0 = nlcount(u, 0, u->q0, &a->rq0);
628 		a->lq1 = nlcount(u, u->q0, u->q1, &a->rq1);
629 	}
630 	r = bytetorune(name, &n);
631 	for(i=0; i<t->file->ntext; i++){
632 		u = t->file->text[i];
633 		/* second and subsequent calls with zero an already empty buffer, but OK */
634 		textreset(u);
635 		windirfree(u->w);
636 	}
637 	samename = runeeq(r, n, t->file->name, t->file->nname);
638 	textload(t, 0, name, samename);
639 	if(samename){
640 		t->file->mod = FALSE;
641 		dirty = FALSE;
642 	}else{
643 		t->file->mod = TRUE;
644 		dirty = TRUE;
645 	}
646 	for(i=0; i<t->file->ntext; i++)
647 		t->file->text[i]->w->dirty = dirty;
648 	free(name);
649 	free(r);
650 	winsettag(w);
651 	t->file->unread = FALSE;
652 	for(i=0; i<t->file->ntext; i++){
653 		u = t->file->text[i];
654 		textsetselect(&u->w->tag, u->w->tag.file->b.nc, u->w->tag.file->b.nc);
655 		if(samename) {
656 			a = &addr[i];
657 			// warning(nil, "%d %d %d %d %d %d\n", a->lorigin, a->rorigin, a->lq0, a->rq0, a->lq1, a->rq1);
658 			q0 = nlcounttopos(u, 0, a->lq0, a->rq0);
659 			q1 = nlcounttopos(u, q0, a->lq1, a->rq1);
660 			textsetselect(u, q0, q1);
661 			q0 = nlcounttopos(u, 0, a->lorigin, a->rorigin);
662 			textsetorigin(u, q0, FALSE);
663 		}
664 		textscrdraw(u);
665 	}
666 	free(addr);
667 	xfidlog(w, "get");
668 }
669 
670 static void
671 checksha1(char *name, File *f, Dir *d)
672 {
673 	int fd, n;
674 	DigestState *h;
675 	uchar out[20];
676 	uchar *buf;
677 
678 	fd = open(name, OREAD);
679 	if(fd < 0)
680 		return;
681 	h = sha1(nil, 0, nil, nil);
682 	buf = emalloc(8192);
683 	while((n = read(fd, buf, 8192)) > 0)
684 		sha1(buf, n, nil, h);
685 	free(buf);
686 	close(fd);
687 	sha1(nil, 0, out, h);
688 	if(memcmp(out, f->sha1, sizeof out) == 0) {
689 		f->dev = d->dev;
690 		f->qidpath = d->qid.path;
691 		f->mtime = d->mtime;
692 	}
693 }
694 
695 void
696 putfile(File *f, int q0, int q1, Rune *namer, int nname)
697 {
698 	uint n, m;
699 	Rune *r;
700 	Biobuf *b;
701 	char *s, *name;
702 	int i, fd, q, ret, retc;
703 	Dir *d, *d1;
704 	Window *w;
705 	int isapp;
706 	DigestState *h;
707 
708 	w = f->curtext->w;
709 	name = runetobyte(namer, nname);
710 	d = dirstat(name);
711 	if(d!=nil && runeeq(namer, nname, f->name, f->nname)){
712 		if(f->dev!=d->dev || f->qidpath!=d->qid.path || f->mtime != d->mtime)
713 			checksha1(name, f, d);
714 		if(f->dev!=d->dev || f->qidpath!=d->qid.path || f->mtime != d->mtime) {
715 			if(f->unread)
716 				warning(nil, "%s not written; file already exists\n", name);
717 			else
718 				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);
719 			f->dev = d->dev;
720 			f->qidpath = d->qid.path;
721 			f->mtime = d->mtime;
722 			goto Rescue1;
723 		}
724 	}
725 
726 	fd = create(name, OWRITE, 0666);
727 	if(fd < 0){
728 		warning(nil, "can't create file %s: %r\n", name);
729 		goto Rescue1;
730 	}
731 	// Use bio in order to force the writes to be large and
732 	// block-aligned (bio's default is 8K). This is not strictly
733 	// necessary; it works around some buggy underlying
734 	// file systems that mishandle unaligned writes.
735 	// https://codereview.appspot.com/89550043/
736 	b = emalloc(sizeof *b);
737 	Binit(b, fd, OWRITE);
738 	r = fbufalloc();
739 	s = fbufalloc();
740 	free(d);
741 	d = dirfstat(fd);
742 	h = sha1(nil, 0, nil, nil);
743 	isapp = (d!=nil && d->length>0 && (d->qid.type&QTAPPEND));
744 	if(isapp){
745 		warning(nil, "%s not written; file is append only\n", name);
746 		goto Rescue2;
747 	}
748 
749 	for(q=q0; q<q1; q+=n){
750 		n = q1 - q;
751 		if(n > BUFSIZE/UTFmax)
752 			n = BUFSIZE/UTFmax;
753 		bufread(&f->b, q, r, n);
754 		m = snprint(s, BUFSIZE+1, "%.*S", n, r);
755 		sha1((uchar*)s, m, nil, h);
756 		if(Bwrite(b, s, m) != m){
757 			warning(nil, "can't write file %s: %r\n", name);
758 			goto Rescue2;
759 		}
760 	}
761 	if(Bflush(b) < 0) {
762 		warning(nil, "can't write file %s: %r\n", name);
763 		goto Rescue2;
764 	}
765 	ret = Bterm(b);
766 	retc = close(fd);
767 	free(b);
768 	b = nil;
769 	if(ret < 0 || retc < 0) {
770 		warning(nil, "can't write file %s: %r\n", name);
771 		goto Rescue2; // flush or close failed
772 	}
773 	if(runeeq(namer, nname, f->name, f->nname)){
774 		if(q0!=0 || q1!=f->b.nc){
775 			f->mod = TRUE;
776 			w->dirty = TRUE;
777 			f->unread = TRUE;
778 		}else{
779 			// In case the file is on NFS, reopen the fd
780 			// before dirfstat to cause the attribute cache
781 			// to be updated (otherwise the mtime in the
782 			// dirfstat below will be stale and not match
783 			// what NFS sees).  The file is already written,
784 			// so this should be a no-op when not on NFS.
785 			// Opening for OWRITE (but no truncation)
786 			// in case we don't have read permission.
787 			// (The create above worked, so we probably
788 			// still have write permission.)
789 			fd = open(name, OWRITE);
790 			d1 = dirfstat(fd);
791 			close(fd);
792 			if(d1 != nil){
793 				free(d);
794 				d = d1;
795 			}
796 			f->qidpath = d->qid.path;
797 			f->dev = d->dev;
798 			f->mtime = d->mtime;
799 			sha1(nil, 0, f->sha1, h);
800 			h = nil;
801 			f->mod = FALSE;
802 			w->dirty = FALSE;
803 			f->unread = FALSE;
804 		}
805 		for(i=0; i<f->ntext; i++){
806 			f->text[i]->w->putseq = f->seq;
807 			f->text[i]->w->dirty = w->dirty;
808 		}
809 	}
810 	fbuffree(s);
811 	fbuffree(r);
812 	free(h);
813 	free(d);
814 	free(namer);
815 	free(name);
816 	close(fd);
817 	winsettag(w);
818 	return;
819 
820     Rescue2:
821 	if(b != nil) {
822 		Bterm(b);
823 		free(b);
824 		close(fd);
825 	}
826 	free(h);
827 	fbuffree(s);
828 	fbuffree(r);
829 	/* fall through */
830 
831     Rescue1:
832 	free(d);
833 	free(namer);
834 	free(name);
835 }
836 
837 static void
838 trimspaces(Text *et)
839 {
840 	File *f;
841 	Rune *r;
842 	Text *t;
843 	uint q0, n, delstart;
844 	int c, i, marked;
845 
846 	t = &et->w->body;
847 	f = t->file;
848 	marked = 0;
849 
850 	if(t->w!=nil && et->w!=t->w){
851 		/* can this happen when t == &et->w->body? */
852 		c = 'M';
853 		if(et->w)
854 			c = et->w->owner;
855 		winlock(t->w, c);
856 	}
857 
858 	r = fbufalloc();
859 	q0 = f->b.nc;
860 	delstart = q0; /* end of current space run, or 0 if no active run; = q0 to delete spaces before EOF */
861 	while(q0 > 0) {
862 		n = RBUFSIZE;
863 		if(n > q0)
864 			n = q0;
865 		q0 -= n;
866 		bufread(&f->b, q0, r, n);
867 		for(i=n; ; i--) {
868 			if(i == 0 || (r[i-1] != ' ' && r[i-1] != '\t')) {
869 				// Found non-space or start of buffer. Delete active space run.
870 				if(q0+i < delstart) {
871 					if(!marked) {
872 						marked = 1;
873 						seq++;
874 						filemark(f);
875 					}
876 					textdelete(t, q0+i, delstart, TRUE);
877 				}
878 				if(i == 0) {
879 					/* keep run active into tail of next buffer */
880 					if(delstart > 0)
881 						delstart = q0;
882 					break;
883 				}
884 				delstart = 0;
885 				if(r[i-1] == '\n')
886 					delstart = q0+i-1; /* delete spaces before this newline */
887 			}
888 		}
889 	}
890 	fbuffree(r);
891 
892 	if(t->w!=nil && et->w!=t->w)
893 		winunlock(t->w);
894 }
895 
896 void
897 put(Text *et, Text *_0, Text *argt, int _1, int _2, Rune *arg, int narg)
898 {
899 	int nname;
900 	Rune  *namer;
901 	Window *w;
902 	File *f;
903 	char *name;
904 
905 	USED(_0);
906 	USED(_1);
907 	USED(_2);
908 
909 	if(et==nil || et->w==nil || et->w->isdir)
910 		return;
911 	w = et->w;
912 	f = w->body.file;
913 	name = getname(&w->body, argt, arg, narg, TRUE);
914 	if(name == nil){
915 		warning(nil, "no file name\n");
916 		return;
917 	}
918 	if(w->autoindent)
919 		trimspaces(et);
920 	namer = bytetorune(name, &nname);
921 	putfile(f, 0, f->b.nc, namer, nname);
922 	xfidlog(w, "put");
923 	free(name);
924 }
925 
926 void
927 dump(Text *_0, Text *_1, Text *argt, int isdump, int _2, Rune *arg, int narg)
928 {
929 	char *name;
930 
931 	USED(_0);
932 	USED(_1);
933 	USED(_2);
934 
935 	if(narg)
936 		name = runetobyte(arg, narg);
937 	else
938 		getbytearg(argt, FALSE, TRUE, &name);
939 	if(isdump)
940 		rowdump(&row, name);
941 	else
942 		rowload(&row, name, FALSE);
943 	free(name);
944 }
945 
946 void
947 cut(Text *et, Text *t, Text *_0, int dosnarf, int docut, Rune *_2, int _3)
948 {
949 	uint q0, q1, n, locked, c;
950 	Rune *r;
951 
952 	USED(_0);
953 	USED(_2);
954 	USED(_3);
955 
956 	/*
957 	 * if not executing a mouse chord (et != t) and snarfing (dosnarf)
958 	 * and executed Cut or Snarf in window tag (et->w != nil),
959 	 * then use the window body selection or the tag selection
960 	 * or do nothing at all.
961 	 */
962 	if(et!=t && dosnarf && et->w!=nil){
963 		if(et->w->body.q1>et->w->body.q0){
964 			t = &et->w->body;
965 			if(docut)
966 				filemark(t->file);	/* seq has been incremented by execute */
967 		}else if(et->w->tag.q1>et->w->tag.q0)
968 			t = &et->w->tag;
969 		else
970 			t = nil;
971 	}
972 	if(t == nil)	/* no selection */
973 		return;
974 
975 	locked = FALSE;
976 	if(t->w!=nil && et->w!=t->w){
977 		locked = TRUE;
978 		c = 'M';
979 		if(et->w)
980 			c = et->w->owner;
981 		winlock(t->w, c);
982 	}
983 	if(t->q0 == t->q1){
984 		if(locked)
985 			winunlock(t->w);
986 		return;
987 	}
988 	if(dosnarf){
989 		q0 = t->q0;
990 		q1 = t->q1;
991 		bufdelete(&snarfbuf, 0, snarfbuf.nc);
992 		r = fbufalloc();
993 		while(q0 < q1){
994 			n = q1 - q0;
995 			if(n > RBUFSIZE)
996 				n = RBUFSIZE;
997 			bufread(&t->file->b, q0, r, n);
998 			bufinsert(&snarfbuf, snarfbuf.nc, r, n);
999 			q0 += n;
1000 		}
1001 		fbuffree(r);
1002 		acmeputsnarf();
1003 	}
1004 	if(docut){
1005 		textdelete(t, t->q0, t->q1, TRUE);
1006 		textsetselect(t, t->q0, t->q0);
1007 		if(t->w){
1008 			textscrdraw(t);
1009 			winsettag(t->w);
1010 		}
1011 	}else if(dosnarf)	/* Snarf command */
1012 		argtext = t;
1013 	if(locked)
1014 		winunlock(t->w);
1015 }
1016 
1017 void
1018 paste(Text *et, Text *t, Text *_0, int selectall, int tobody, Rune *_1, int _2)
1019 {
1020 	int c;
1021 	uint q, q0, q1, n;
1022 	Rune *r;
1023 
1024 	USED(_0);
1025 	USED(_1);
1026 	USED(_2);
1027 
1028 	/* if(tobody), use body of executing window  (Paste or Send command) */
1029 	if(tobody && et!=nil && et->w!=nil){
1030 		t = &et->w->body;
1031 		filemark(t->file);	/* seq has been incremented by execute */
1032 	}
1033 	if(t == nil)
1034 		return;
1035 
1036 	acmegetsnarf();
1037 	if(t==nil || snarfbuf.nc==0)
1038 		return;
1039 	if(t->w!=nil && et->w!=t->w){
1040 		c = 'M';
1041 		if(et->w)
1042 			c = et->w->owner;
1043 		winlock(t->w, c);
1044 	}
1045 	cut(t, t, nil, FALSE, TRUE, nil, 0);
1046 	q = 0;
1047 	q0 = t->q0;
1048 	q1 = t->q0+snarfbuf.nc;
1049 	r = fbufalloc();
1050 	while(q0 < q1){
1051 		n = q1 - q0;
1052 		if(n > RBUFSIZE)
1053 			n = RBUFSIZE;
1054 		if(r == nil)
1055 			r = runemalloc(n);
1056 		bufread(&snarfbuf, q, r, n);
1057 		textinsert(t, q0, r, n, TRUE);
1058 		q += n;
1059 		q0 += n;
1060 	}
1061 	fbuffree(r);
1062 	if(selectall)
1063 		textsetselect(t, t->q0, q1);
1064 	else
1065 		textsetselect(t, q1, q1);
1066 	if(t->w){
1067 		textscrdraw(t);
1068 		winsettag(t->w);
1069 	}
1070 	if(t->w!=nil && et->w!=t->w)
1071 		winunlock(t->w);
1072 }
1073 
1074 void
1075 look(Text *et, Text *t, Text *argt, int _0, int _1, Rune *arg, int narg)
1076 {
1077 	Rune *r;
1078 	int n;
1079 
1080 	USED(_0);
1081 	USED(_1);
1082 
1083 	if(et && et->w){
1084 		t = &et->w->body;
1085 		if(narg > 0){
1086 			search(t, arg, narg);
1087 			return;
1088 		}
1089 		getarg(argt, FALSE, FALSE, &r, &n);
1090 		if(r == nil){
1091 			n = t->q1-t->q0;
1092 			r = runemalloc(n);
1093 			bufread(&t->file->b, t->q0, r, n);
1094 		}
1095 		search(t, r, n);
1096 		free(r);
1097 	}
1098 }
1099 
1100 static Rune Lnl[] = { '\n', 0 };
1101 
1102 void
1103 sendx(Text *et, Text *t, Text *_0, int _1, int _2, Rune *_3, int _4)
1104 {
1105 	USED(_0);
1106 	USED(_1);
1107 	USED(_2);
1108 	USED(_3);
1109 	USED(_4);
1110 
1111 	if(et->w==nil)
1112 		return;
1113 	t = &et->w->body;
1114 	if(t->q0 != t->q1)
1115 		cut(t, t, nil, TRUE, FALSE, nil, 0);
1116 	textsetselect(t, t->file->b.nc, t->file->b.nc);
1117 	paste(t, t, nil, TRUE, TRUE, nil, 0);
1118 	if(textreadc(t, t->file->b.nc-1) != '\n'){
1119 		textinsert(t, t->file->b.nc, Lnl, 1, TRUE);
1120 		textsetselect(t, t->file->b.nc, t->file->b.nc);
1121 	}
1122 	t->iq1 = t->q1;
1123 	textshow(t, t->q1, t->q1, 1);
1124 }
1125 
1126 void
1127 edit(Text *et, Text *_0, Text *argt, int _1, int _2, Rune *arg, int narg)
1128 {
1129 	Rune *r;
1130 	int len;
1131 
1132 	USED(_0);
1133 	USED(_1);
1134 	USED(_2);
1135 
1136 	if(et == nil)
1137 		return;
1138 	getarg(argt, FALSE, TRUE, &r, &len);
1139 	seq++;
1140 	if(r != nil){
1141 		editcmd(et, r, len);
1142 		free(r);
1143 	}else
1144 		editcmd(et, arg, narg);
1145 }
1146 
1147 void
1148 xexit(Text *et, Text *_0, Text *_1, int _2, int _3, Rune *_4, int _5)
1149 {
1150 	USED(et);
1151 	USED(_0);
1152 	USED(_1);
1153 	USED(_2);
1154 	USED(_3);
1155 	USED(_4);
1156 	USED(_5);
1157 
1158 	if(rowclean(&row)){
1159 		sendul(cexit, 0);
1160 		threadexits(nil);
1161 	}
1162 }
1163 
1164 void
1165 putall(Text *et, Text *_0, Text *_1, int _2, int _3, Rune *_4, int _5)
1166 {
1167 	int i, j, e;
1168 	Window *w;
1169 	Column *c;
1170 	char *a;
1171 
1172 	USED(et);
1173 	USED(_0);
1174 	USED(_1);
1175 	USED(_2);
1176 	USED(_3);
1177 	USED(_4);
1178 	USED(_5);
1179 
1180 	for(i=0; i<row.ncol; i++){
1181 		c = row.col[i];
1182 		for(j=0; j<c->nw; j++){
1183 			w = c->w[j];
1184 			if(w->isscratch || w->isdir || w->body.file->nname==0)
1185 				continue;
1186 			if(w->nopen[QWevent] > 0)
1187 				continue;
1188 			a = runetobyte(w->body.file->name, w->body.file->nname);
1189 			e = access(a, 0);
1190 			if(w->body.file->mod || w->body.ncache)
1191 				if(e < 0)
1192 					warning(nil, "no auto-Put of %s: %r\n", a);
1193 				else{
1194 					wincommit(w, &w->body);
1195 					put(&w->body, nil, nil, XXX, XXX, nil, 0);
1196 				}
1197 			free(a);
1198 		}
1199 	}
1200 }
1201 
1202 
1203 void
1204 id(Text *et, Text *_0, Text *_1, int _2, int _3, Rune *_4, int _5)
1205 {
1206 	USED(_0);
1207 	USED(_1);
1208 	USED(_2);
1209 	USED(_3);
1210 	USED(_4);
1211 	USED(_5);
1212 
1213 	if(et && et->w)
1214 		warning(nil, "/mnt/acme/%d/\n", et->w->id);
1215 }
1216 
1217 void
1218 local(Text *et, Text *_0, Text *argt, int _1, int _2, Rune *arg, int narg)
1219 {
1220 	char *a, *aa;
1221 	Runestr dir;
1222 
1223 	USED(_0);
1224 	USED(_1);
1225 	USED(_2);
1226 
1227 	aa = getbytearg(argt, TRUE, TRUE, &a);
1228 
1229 	dir = dirname(et, nil, 0);
1230 	if(dir.nr==1 && dir.r[0]=='.'){	/* sigh */
1231 		free(dir.r);
1232 		dir.r = nil;
1233 		dir.nr = 0;
1234 	}
1235 	run(nil, runetobyte(arg, narg), dir.r, dir.nr, FALSE, aa, a, FALSE);
1236 }
1237 
1238 void
1239 xkill(Text *_0, Text *_1, Text *argt, int _2, int _3, Rune *arg, int narg)
1240 {
1241 	Rune *a, *cmd, *r;
1242 	int na;
1243 
1244 	USED(_0);
1245 	USED(_1);
1246 	USED(_2);
1247 	USED(_3);
1248 
1249 	getarg(argt, FALSE, FALSE, &r, &na);
1250 	if(r)
1251 		xkill(nil, nil, nil, 0, 0, r, na);
1252 	/* loop condition: *arg is not a blank */
1253 	for(;;){
1254 		a = findbl(arg, narg, &na);
1255 		if(a == arg)
1256 			break;
1257 		cmd = runemalloc(narg-na+1);
1258 		runemove(cmd, arg, narg-na);
1259 		sendp(ckill, cmd);
1260 		arg = skipbl(a, na, &narg);
1261 	}
1262 }
1263 
1264 static Rune Lfix[] = { 'f', 'i', 'x', 0 };
1265 static Rune Lvar[] = { 'v', 'a', 'r', 0 };
1266 
1267 void
1268 fontx(Text *et, Text *t, Text *argt, int _0, int _1, Rune *arg, int narg)
1269 {
1270 	Rune *a, *r, *flag, *file;
1271 	int na, nf;
1272 	char *aa;
1273 	Reffont *newfont;
1274 	Dirlist *dp;
1275 	int i, fix;
1276 
1277 	USED(_0);
1278 	USED(_1);
1279 
1280 	if(et==nil || et->w==nil)
1281 		return;
1282 	t = &et->w->body;
1283 	flag = nil;
1284 	file = nil;
1285 	/* loop condition: *arg is not a blank */
1286 	nf = 0;
1287 	for(;;){
1288 		a = findbl(arg, narg, &na);
1289 		if(a == arg)
1290 			break;
1291 		r = runemalloc(narg-na+1);
1292 		runemove(r, arg, narg-na);
1293 		if(runeeq(r, narg-na, Lfix, 3) || runeeq(r, narg-na, Lvar, 3)){
1294 			free(flag);
1295 			flag = r;
1296 		}else{
1297 			free(file);
1298 			file = r;
1299 			nf = narg-na;
1300 		}
1301 		arg = skipbl(a, na, &narg);
1302 	}
1303 	getarg(argt, FALSE, TRUE, &r, &na);
1304 	if(r)
1305 		if(runeeq(r, na, Lfix, 3) || runeeq(r, na, Lvar, 3)){
1306 			free(flag);
1307 			flag = r;
1308 		}else{
1309 			free(file);
1310 			file = r;
1311 			nf = na;
1312 		}
1313 	fix = 1;
1314 	if(flag)
1315 		fix = runeeq(flag, runestrlen(flag), Lfix, 3);
1316 	else if(file == nil){
1317 		newfont = rfget(FALSE, FALSE, FALSE, nil);
1318 		if(newfont)
1319 			fix = strcmp(newfont->f->name, t->fr.font->name)==0;
1320 	}
1321 	if(file){
1322 		aa = runetobyte(file, nf);
1323 		newfont = rfget(fix, flag!=nil, FALSE, aa);
1324 		free(aa);
1325 	}else
1326 		newfont = rfget(fix, FALSE, FALSE, nil);
1327 	if(newfont){
1328 		draw(screen, t->w->r, textcols[BACK], nil, ZP);
1329 		rfclose(t->reffont);
1330 		t->reffont = newfont;
1331 		t->fr.font = newfont->f;
1332 		frinittick(&t->fr);
1333 		if(t->w->isdir){
1334 			t->all.min.x++;	/* force recolumnation; disgusting! */
1335 			for(i=0; i<t->w->ndl; i++){
1336 				dp = t->w->dlp[i];
1337 				aa = runetobyte(dp->r, dp->nr);
1338 				dp->wid = stringwidth(newfont->f, aa);
1339 				free(aa);
1340 			}
1341 		}
1342 		/* avoid shrinking of window due to quantization */
1343 		colgrow(t->w->col, t->w, -1);
1344 	}
1345 	free(file);
1346 	free(flag);
1347 }
1348 
1349 void
1350 incl(Text *et, Text *_0, Text *argt, int _1, int _2, Rune *arg, int narg)
1351 {
1352 	Rune *a, *r;
1353 	Window *w;
1354 	int na, n, len;
1355 
1356 	USED(_0);
1357 	USED(_1);
1358 	USED(_2);
1359 
1360 	if(et==nil || et->w==nil)
1361 		return;
1362 	w = et->w;
1363 	n = 0;
1364 	getarg(argt, FALSE, TRUE, &r, &len);
1365 	if(r){
1366 		n++;
1367 		winaddincl(w, r, len);
1368 	}
1369 	/* loop condition: *arg is not a blank */
1370 	for(;;){
1371 		a = findbl(arg, narg, &na);
1372 		if(a == arg)
1373 			break;
1374 		r = runemalloc(narg-na+1);
1375 		runemove(r, arg, narg-na);
1376 		n++;
1377 		winaddincl(w, r, narg-na);
1378 		arg = skipbl(a, na, &narg);
1379 	}
1380 	if(n==0 && w->nincl){
1381 		for(n=w->nincl; --n>=0; )
1382 			warning(nil, "%S ", w->incl[n]);
1383 		warning(nil, "\n");
1384 	}
1385 }
1386 
1387 static Rune LON[] = { 'O', 'N', 0 };
1388 static Rune LOFF[] = { 'O', 'F', 'F', 0 };
1389 static Rune Lon[] = { 'o', 'n', 0 };
1390 
1391 enum {
1392 	IGlobal = -2,
1393 	IError = -1,
1394 	Ion = 0,
1395 	Ioff = 1
1396 };
1397 
1398 static int
1399 indentval(Rune *s, int n)
1400 {
1401 	if(n < 2)
1402 		return IError;
1403 	if(runestrncmp(s, LON, n) == 0){
1404 		globalautoindent = TRUE;
1405 		warning(nil, "Indent ON\n");
1406 		return IGlobal;
1407 	}
1408 	if(runestrncmp(s, LOFF, n) == 0){
1409 		globalautoindent = FALSE;
1410 		warning(nil, "Indent OFF\n");
1411 		return IGlobal;
1412 	}
1413 	return runestrncmp(s, Lon, n) == 0;
1414 }
1415 
1416 static void
1417 fixindent(Window *w, void *arg)
1418 {
1419 	USED(arg);
1420 	w->autoindent = globalautoindent;
1421 }
1422 
1423 void
1424 indent(Text *et, Text *_0, Text *argt, int _1, int _2, Rune *arg, int narg)
1425 {
1426 	Rune *a, *r;
1427 	Window *w;
1428 	int na, len, autoindent;
1429 
1430 	USED(_0);
1431 	USED(_1);
1432 	USED(_2);
1433 
1434 	w = nil;
1435 	if(et!=nil && et->w!=nil)
1436 		w = et->w;
1437 	autoindent = IError;
1438 	getarg(argt, FALSE, TRUE, &r, &len);
1439 	if(r!=nil && len>0)
1440 		autoindent = indentval(r, len);
1441 	else{
1442 		a = findbl(arg, narg, &na);
1443 		if(a != arg)
1444 			autoindent = indentval(arg, narg-na);
1445 	}
1446 	if(autoindent == IGlobal)
1447 		allwindows(fixindent, nil);
1448 	else if(w != nil && autoindent >= 0)
1449 		w->autoindent = autoindent;
1450 }
1451 
1452 void
1453 tab(Text *et, Text *_0, Text *argt, int _1, int _2, Rune *arg, int narg)
1454 {
1455 	Rune *a, *r;
1456 	Window *w;
1457 	int na, len, tab;
1458 	char *p;
1459 
1460 	USED(_0);
1461 	USED(_1);
1462 	USED(_2);
1463 
1464 	if(et==nil || et->w==nil)
1465 		return;
1466 	w = et->w;
1467 	getarg(argt, FALSE, TRUE, &r, &len);
1468 	tab = 0;
1469 	if(r!=nil && len>0){
1470 		p = runetobyte(r, len);
1471 		if('0'<=p[0] && p[0]<='9')
1472 			tab = atoi(p);
1473 		free(p);
1474 	}else{
1475 		a = findbl(arg, narg, &na);
1476 		if(a != arg){
1477 			p = runetobyte(arg, narg-na);
1478 			if('0'<=p[0] && p[0]<='9')
1479 				tab = atoi(p);
1480 			free(p);
1481 		}
1482 	}
1483 	if(tab > 0){
1484 		if(w->body.tabstop != tab){
1485 			w->body.tabstop = tab;
1486 			winresize(w, w->r, FALSE, TRUE);
1487 		}
1488 	}else
1489 		warning(nil, "%.*S: Tab %d\n", w->body.file->nname, w->body.file->name, w->body.tabstop);
1490 }
1491 
1492 void
1493 runproc(void *argvp)
1494 {
1495 	/* args: */
1496 		Window *win;
1497 		char *s;
1498 		Rune *rdir;
1499 		int ndir;
1500 		int newns;
1501 		char *argaddr;
1502 		char *arg;
1503 		Command *c;
1504 		Channel *cpid;
1505 		int iseditcmd;
1506 	/* end of args */
1507 	char *e, *t, *name, *filename, *dir, **av, *news;
1508 	Rune r, **incl;
1509 	int ac, w, inarg, i, n, fd, nincl, winid;
1510 	int sfd[3];
1511 	int pipechar;
1512 	char buf[512];
1513 	int ret;
1514 	/*static void *parg[2]; */
1515 	char *rcarg[4];
1516 	void **argv;
1517 	CFsys *fs;
1518 	char *shell;
1519 
1520 	threadsetname("runproc");
1521 
1522 	argv = argvp;
1523 	win = argv[0];
1524 	s = argv[1];
1525 	rdir = argv[2];
1526 	ndir = (uintptr)argv[3];
1527 	newns = (uintptr)argv[4];
1528 	argaddr = argv[5];
1529 	arg = argv[6];
1530 	c = argv[7];
1531 	cpid = argv[8];
1532 	iseditcmd = (uintptr)argv[9];
1533 	free(argv);
1534 
1535 	t = s;
1536 	while(*t==' ' || *t=='\n' || *t=='\t')
1537 		t++;
1538 	for(e=t; *e; e++)
1539 		if(*e==' ' || *e=='\n' || *e=='\t' )
1540 			break;
1541 	name = emalloc((e-t)+2);
1542 	memmove(name, t, e-t);
1543 	name[e-t] = 0;
1544 	e = utfrrune(name, '/');
1545 	if(e)
1546 		memmove(name, e+1, strlen(e+1)+1);	/* strcpy but overlaps */
1547 	strcat(name, " ");	/* add blank here for ease in waittask */
1548 	c->name = bytetorune(name, &c->nname);
1549 	free(name);
1550 	pipechar = 0;
1551 	if(*t=='<' || *t=='|' || *t=='>')
1552 		pipechar = *t++;
1553 	c->iseditcmd = iseditcmd;
1554 	c->text = s;
1555 	if(newns){
1556 		nincl = 0;
1557 		incl = nil;
1558 		if(win){
1559 			filename = smprint("%.*S", win->body.file->nname, win->body.file->name);
1560 			nincl = win->nincl;
1561 			if(nincl > 0){
1562 				incl = emalloc(nincl*sizeof(Rune*));
1563 				for(i=0; i<nincl; i++){
1564 					n = runestrlen(win->incl[i]);
1565 					incl[i] = runemalloc(n+1);
1566 					runemove(incl[i], win->incl[i], n);
1567 				}
1568 			}
1569 			winid = win->id;
1570 		}else{
1571 			filename = nil;
1572 			winid = 0;
1573 			if(activewin)
1574 				winid = activewin->id;
1575 		}
1576 		rfork(RFNAMEG|RFENVG|RFFDG|RFNOTEG);
1577 		sprint(buf, "%d", winid);
1578 		putenv("winid", buf);
1579 
1580 		if(filename){
1581 			putenv("%", filename);
1582 			putenv("samfile", filename);
1583 			free(filename);
1584 		}
1585 		c->md = fsysmount(rdir, ndir, incl, nincl);
1586 		if(c->md == nil){
1587 			fprint(2, "child: can't allocate mntdir: %r\n");
1588 			threadexits("fsysmount");
1589 		}
1590 		sprint(buf, "%d", c->md->id);
1591 		if((fs = nsmount("acme", buf)) == nil){
1592 			fprint(2, "child: can't mount acme: %r\n");
1593 			fsysdelid(c->md);
1594 			c->md = nil;
1595 			threadexits("nsmount");
1596 		}
1597 		if(winid>0 && (pipechar=='|' || pipechar=='>')){
1598 			sprint(buf, "%d/rdsel", winid);
1599 			sfd[0] = fsopenfd(fs, buf, OREAD);
1600 		}else
1601 			sfd[0] = open("/dev/null", OREAD);
1602 		if((winid>0 || iseditcmd) && (pipechar=='|' || pipechar=='<')){
1603 			if(iseditcmd){
1604 				if(winid > 0)
1605 					sprint(buf, "%d/editout", winid);
1606 				else
1607 					sprint(buf, "editout");
1608 			}else
1609 				sprint(buf, "%d/wrsel", winid);
1610 			sfd[1] = fsopenfd(fs, buf, OWRITE);
1611 			sfd[2] = fsopenfd(fs, "cons", OWRITE);
1612 		}else{
1613 			sfd[1] = fsopenfd(fs, "cons", OWRITE);
1614 			sfd[2] = sfd[1];
1615 		}
1616 		fsunmount(fs);
1617 	}else{
1618 		rfork(RFFDG|RFNOTEG);
1619 		fsysclose();
1620 		sfd[0] = open("/dev/null", OREAD);
1621 		sfd[1] = open("/dev/null", OWRITE);
1622 		sfd[2] = dup(erroutfd, -1);
1623 	}
1624 	if(win)
1625 		winclose(win);
1626 
1627 	if(argaddr)
1628 		putenv("acmeaddr", argaddr);
1629 	if(acmeshell != nil)
1630 		goto Hard;
1631 	if(strlen(t) > sizeof buf-10)	/* may need to print into stack */
1632 		goto Hard;
1633 	inarg = FALSE;
1634 	for(e=t; *e; e+=w){
1635 		w = chartorune(&r, e);
1636 		if(r==' ' || r=='\t')
1637 			continue;
1638 		if(r < ' ')
1639 			goto Hard;
1640 		if(utfrune("#;&|^$=`'{}()<>[]*?^~`/", r))
1641 			goto Hard;
1642 		inarg = TRUE;
1643 	}
1644 	if(!inarg)
1645 		goto Fail;
1646 
1647 	ac = 0;
1648 	av = nil;
1649 	inarg = FALSE;
1650 	for(e=t; *e; e+=w){
1651 		w = chartorune(&r, e);
1652 		if(r==' ' || r=='\t'){
1653 			inarg = FALSE;
1654 			*e = 0;
1655 			continue;
1656 		}
1657 		if(!inarg){
1658 			inarg = TRUE;
1659 			av = realloc(av, (ac+1)*sizeof(char**));
1660 			av[ac++] = e;
1661 		}
1662 	}
1663 	av = realloc(av, (ac+2)*sizeof(char**));
1664 	av[ac++] = arg;
1665 	av[ac] = nil;
1666 	c->av = av;
1667 
1668 	dir = nil;
1669 	if(rdir != nil)
1670 		dir = runetobyte(rdir, ndir);
1671 	ret = threadspawnd(sfd, av[0], av, dir);
1672 	free(dir);
1673 	if(ret >= 0){
1674 		if(cpid)
1675 			sendul(cpid, ret);
1676 		threadexits("");
1677 	}
1678 /* libthread uses execvp so no need to do this */
1679 #if 0
1680 	e = av[0];
1681 	if(e[0]=='/' || (e[0]=='.' && e[1]=='/'))
1682 		goto Fail;
1683 	if(cputype){
1684 		sprint(buf, "%s/%s", cputype, av[0]);
1685 		procexec(cpid, sfd, buf, av);
1686 	}
1687 	sprint(buf, "/bin/%s", av[0]);
1688 	procexec(cpid, sfd, buf, av);
1689 #endif
1690 	goto Fail;
1691 
1692 Hard:
1693 	/*
1694 	 * ugly: set path = (. $cputype /bin)
1695 	 * should honor $path if unusual.
1696 	 */
1697 	if(cputype){
1698 		n = 0;
1699 		memmove(buf+n, ".", 2);
1700 		n += 2;
1701 		i = strlen(cputype)+1;
1702 		memmove(buf+n, cputype, i);
1703 		n += i;
1704 		memmove(buf+n, "/bin", 5);
1705 		n += 5;
1706 		fd = create("/env/path", OWRITE, 0666);
1707 		write(fd, buf, n);
1708 		close(fd);
1709 	}
1710 
1711 	if(arg){
1712 		news = emalloc(strlen(t) + 1 + 1 + strlen(arg) + 1 + 1);
1713 		if(news){
1714 			sprint(news, "%s '%s'", t, arg);	/* BUG: what if quote in arg? */
1715 			free(s);
1716 			t = news;
1717 			c->text = news;
1718 		}
1719 	}
1720 	dir = nil;
1721 	if(rdir != nil)
1722 		dir = runetobyte(rdir, ndir);
1723 	shell = acmeshell;
1724 	if(shell == nil)
1725 		shell = "rc";
1726 	rcarg[0] = shell;
1727 	rcarg[1] = "-c";
1728 	rcarg[2] = t;
1729 	rcarg[3] = nil;
1730 	ret = threadspawnd(sfd, rcarg[0], rcarg, dir);
1731 	free(dir);
1732 	if(ret >= 0){
1733 		if(cpid)
1734 			sendul(cpid, ret);
1735 		threadexits(nil);
1736 	}
1737 	warning(nil, "exec %s: %r\n", shell);
1738 
1739    Fail:
1740 	/* threadexec hasn't happened, so send a zero */
1741 	close(sfd[0]);
1742 	close(sfd[1]);
1743 	if(sfd[2] != sfd[1])
1744 		close(sfd[2]);
1745 	sendul(cpid, 0);
1746 	threadexits(nil);
1747 }
1748 
1749 void
1750 runwaittask(void *v)
1751 {
1752 	Command *c;
1753 	Channel *cpid;
1754 	void **a;
1755 
1756 	threadsetname("runwaittask");
1757 	a = v;
1758 	c = a[0];
1759 	cpid = a[1];
1760 	free(a);
1761 	do
1762 		c->pid = recvul(cpid);
1763 	while(c->pid == ~0);
1764 	free(c->av);
1765 	if(c->pid != 0)	/* successful exec */
1766 		sendp(ccommand, c);
1767 	else{
1768 		if(c->iseditcmd)
1769 			sendul(cedit, 0);
1770 		free(c->name);
1771 		free(c->text);
1772 		free(c);
1773 	}
1774 	chanfree(cpid);
1775 }
1776 
1777 void
1778 run(Window *win, char *s, Rune *rdir, int ndir, int newns, char *argaddr, char *xarg, int iseditcmd)
1779 {
1780 	void **arg;
1781 	Command *c;
1782 	Channel *cpid;
1783 
1784 	if(s == nil)
1785 		return;
1786 
1787 	arg = emalloc(10*sizeof(void*));
1788 	c = emalloc(sizeof *c);
1789 	cpid = chancreate(sizeof(ulong), 0);
1790 	chansetname(cpid, "cpid %s", s);
1791 	arg[0] = win;
1792 	arg[1] = s;
1793 	arg[2] = rdir;
1794 	arg[3] = (void*)(uintptr)ndir;
1795 	arg[4] = (void*)(uintptr)newns;
1796 	arg[5] = argaddr;
1797 	arg[6] = xarg;
1798 	arg[7] = c;
1799 	arg[8] = cpid;
1800 	arg[9] = (void*)(uintptr)iseditcmd;
1801 	threadcreate(runproc, arg, STACK);
1802 	/* mustn't block here because must be ready to answer mount() call in run() */
1803 	arg = emalloc(2*sizeof(void*));
1804 	arg[0] = c;
1805 	arg[1] = cpid;
1806 	threadcreate(runwaittask, arg, STACK);
1807 }