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Date:: Mon Nov 1 17:26:59 2004 UTC
Message:: bug fix in Get from rob
Actions:: History | Blame | Raw File
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 #define Fid FsFid
12 #include <fs.h>
13 #undef Fid
14 #include "dat.h"
15 #include "fns.h"
16 
17 Buffer	snarfbuf;
18 
19 void	del(Text*, Text*, Text*, int, int, Rune*, int);
20 void	delcol(Text*, Text*, Text*, int, int, Rune*, int);
21 void	dotfiles(Text*, Text*, Text*, int, int, Rune*, int);
22 void	dump(Text*, Text*, Text*, int, int, Rune*, int);
23 void	edit(Text*, Text*, Text*, int, int, Rune*, int);
24 void	xexit(Text*, Text*, Text*, int, int, Rune*, int);
25 void	fontx(Text*, Text*, Text*, int, int, Rune*, int);
26 void	get(Text*, Text*, Text*, int, int, Rune*, int);
27 void	id(Text*, Text*, Text*, int, int, Rune*, int);
28 void	incl(Text*, Text*, Text*, int, int, Rune*, int);
29 void	indent(Text*, Text*, Text*, int, int, Rune*, int);
30 void	xkill(Text*, Text*, Text*, int, int, Rune*, int);
31 void	local(Text*, Text*, Text*, int, int, Rune*, int);
32 void	look(Text*, Text*, Text*, int, int, Rune*, int);
33 void	newcol(Text*, Text*, Text*, int, int, Rune*, int);
34 void	paste(Text*, Text*, Text*, int, int, Rune*, int);
35 void	put(Text*, Text*, Text*, int, int, Rune*, int);
36 void	putall(Text*, Text*, Text*, int, int, Rune*, int);
37 void	sendx(Text*, Text*, Text*, int, int, Rune*, int);
38 void	sort(Text*, Text*, Text*, int, int, Rune*, int);
39 void	tab(Text*, Text*, Text*, int, int, Rune*, int);
40 void	zeroxx(Text*, Text*, Text*, int, int, Rune*, int);
41 
42 typedef struct Exectab Exectab;
43 struct Exectab
44 {
45 	Rune	*name;
46 	void	(*fn)(Text*, Text*, Text*, int, int, Rune*, int);
47 	int		mark;
48 	int		flag1;
49 	int		flag2;
50 };
51 
52 static Rune LCut[] = { 'C', 'u', 't', 0 };
53 static Rune LDel[] = { 'D', 'e', 'l', 0 };
54 static Rune LDelcol[] = { 'D', 'e', 'l', 'c', 'o', 'l', 0 };
55 static Rune LDelete[] = { 'D', 'e', 'l', 'e', 't', 'e', 0 };
56 static Rune LDump[] = { 'D', 'u', 'm', 'p', 0 };
57 static Rune LEdit[] = { 'E', 'd', 'i', 't', 0 };
58 static Rune LExit[] = { 'E', 'x', 'i', 't', 0 };
59 static Rune LFont[] = { 'F', 'o', 'n', 't', 0 };
60 static Rune LGet[] = { 'G', 'e', 't', 0 };
61 static Rune LID[] = { 'I', 'D', 0 };
62 static Rune LIncl[] = { 'I', 'n', 'c', 'l', 0 };
63 static Rune LIndent[] = { 'I', 'n', 'd', 'e', 'n', 't', 0 };
64 static Rune LKill[] = { 'K', 'i', 'l', 'l', 0 };
65 static Rune LLoad[] = { 'L', 'o', 'a', 'd', 0 };
66 static Rune LLocal[] = { 'L', 'o', 'c', 'a', 'l', 0 };
67 static Rune LLook[] = { 'L', 'o', 'o', 'k', 0 };
68 static Rune LNew[] = { 'N', 'e', 'w', 0 };
69 static Rune LNewcol[] = { 'N', 'e', 'w', 'c', 'o', 'l', 0 };
70 static Rune LPaste[] = { 'P', 'a', 's', 't', 'e', 0 };
71 static Rune LPut[] = { 'P', 'u', 't', 0 };
72 static Rune LPutall[] = { 'P', 'u', 't', 'a', 'l', 'l', 0 };
73 static Rune LRedo[] = { 'R', 'e', 'd', 'o', 0 };
74 static Rune LSend[] = { 'S', 'e', 'n', 'd', 0 };
75 static Rune LSnarf[] = { 'S', 'n', 'a', 'r', 'f', 0 };
76 static Rune LSort[] = { 'S', 'o', 'r', 't', 0 };
77 static Rune LTab[] = { 'T', 'a', 'b', 0 };
78 static Rune LUndo[] = { 'U', 'n', 'd', 'o', 0 };
79 static Rune LZerox[] = { 'Z', 'e', 'r', 'o', 'x', 0 };
80 
81 Exectab exectab[] = {
82 	{ LCut,		cut,		TRUE,	TRUE,	TRUE	},
83 	{ LDel,		del,		FALSE,	FALSE,	XXX		},
84 	{ LDelcol,	delcol,	FALSE,	XXX,		XXX		},
85 	{ LDelete,	del,		FALSE,	TRUE,	XXX		},
86 	{ LDump,	dump,	FALSE,	TRUE,	XXX		},
87 	{ LEdit,		edit,		FALSE,	XXX,		XXX		},
88 	{ LExit,		xexit,		FALSE,	XXX,		XXX		},
89 	{ LFont,		fontx,	FALSE,	XXX,		XXX		},
90 	{ LGet,		get,		FALSE,	TRUE,	XXX		},
91 	{ LID,		id,		FALSE,	XXX,		XXX		},
92 	{ LIncl,		incl,		FALSE,	XXX,		XXX		},
93 	{ LIndent,		indent,	FALSE,	XXX,		XXX		},
94 	{ LKill,		xkill,		FALSE,	XXX,		XXX		},
95 	{ LLoad,		dump,	FALSE,	FALSE,	XXX		},
96 	{ LLocal,		local,	FALSE,	XXX,		XXX		},
97 	{ LLook,		look,		FALSE,	XXX,		XXX		},
98 	{ LNew,		new,		FALSE,	XXX,		XXX		},
99 	{ LNewcol,	newcol,	FALSE,	XXX,		XXX		},
100 	{ LPaste,		paste,	TRUE,	TRUE,	XXX		},
101 	{ LPut,		put,		FALSE,	XXX,		XXX		},
102 	{ LPutall,		putall,	FALSE,	XXX,		XXX		},
103 	{ LRedo,		undo,	FALSE,	FALSE,	XXX		},
104 	{ LSend,		sendx,	TRUE,	XXX,		XXX		},
105 	{ LSnarf,		cut,		FALSE,	TRUE,	FALSE	},
106 	{ LSort,		sort,		FALSE,	XXX,		XXX		},
107 	{ LTab,		tab,		FALSE,	XXX,		XXX		},
108 	{ LUndo,		undo,	FALSE,	TRUE,	XXX		},
109 	{ LZerox,	zeroxx,	FALSE,	XXX,		XXX		},
110 	{ nil, 			0,		0,		0,		0		},
111 };
112 
113 Exectab*
114 lookup(Rune *r, int n)
115 {
116 	Exectab *e;
117 	int nr;
118 
119 	r = skipbl(r, n, &n);
120 	if(n == 0)
121 		return nil;
122 	findbl(r, n, &nr);
123 	nr = n-nr;
124 	for(e=exectab; e->name; e++)
125 		if(runeeq(r, nr, e->name, runestrlen(e->name)) == TRUE)
126 			return e;
127 	return nil;
128 }
129 
130 int
131 isexecc(int c)
132 {
133 	if(isfilec(c))
134 		return 1;
135 	return c=='<' || c=='|' || c=='>';
136 }
137 
138 void
139 execute(Text *t, uint aq0, uint aq1, int external, Text *argt)
140 {
141 	uint q0, q1;
142 	Rune *r, *s;
143 	char *b, *a, *aa;
144 	Exectab *e;
145 	int c, n, f;
146 	Runestr dir;
147 
148 	q0 = aq0;
149 	q1 = aq1;
150 	if(q1 == q0){	/* expand to find word (actually file name) */
151 		/* if in selection, choose selection */
152 		if(t->q1>t->q0 && t->q0<=q0 && q0<=t->q1){
153 			q0 = t->q0;
154 			q1 = t->q1;
155 		}else{
156 			while(q1<t->file->b.nc && isexecc(c=textreadc(t, q1)) && c!=':')
157 				q1++;
158 			while(q0>0 && isexecc(c=textreadc(t, q0-1)) && c!=':')
159 				q0--;
160 			if(q1 == q0)
161 				return;
162 		}
163 	}
164 	r = runemalloc(q1-q0);
165 	bufread(&t->file->b, q0, r, q1-q0);
166 	e = lookup(r, q1-q0);
167 	if(!external && t->w!=nil && t->w->nopen[QWevent]>0){
168 		f = 0;
169 		if(e)
170 			f |= 1;
171 		if(q0!=aq0 || q1!=aq1){
172 			bufread(&t->file->b, aq0, r, aq1-aq0);
173 			f |= 2;
174 		}
175 		aa = getbytearg(argt, TRUE, TRUE, &a);
176 		if(a){	
177 			if(strlen(a) > EVENTSIZE){	/* too big; too bad */
178 				free(aa);
179 				free(a);
180 				warning(nil, "`argument string too long\n");
181 				return;
182 			}
183 			f |= 8;
184 		}
185 		c = 'x';
186 		if(t->what == Body)
187 			c = 'X';
188 		n = aq1-aq0;
189 		if(n <= EVENTSIZE)
190 			winevent(t->w, "%c%d %d %d %d %.*S\n", c, aq0, aq1, f, n, n, r);
191 		else
192 			winevent(t->w, "%c%d %d %d 0 \n", c, aq0, aq1, f, n);
193 		if(q0!=aq0 || q1!=aq1){
194 			n = q1-q0;
195 			bufread(&t->file->b, q0, r, n);
196 			if(n <= EVENTSIZE)
197 				winevent(t->w, "%c%d %d 0 %d %.*S\n", c, q0, q1, n, n, r);
198 			else
199 				winevent(t->w, "%c%d %d 0 0 \n", c, q0, q1, n);
200 		}
201 		if(a){
202 			winevent(t->w, "%c0 0 0 %d %s\n", c, utflen(a), a);
203 			if(aa)
204 				winevent(t->w, "%c0 0 0 %d %s\n", c, utflen(aa), aa);
205 			else
206 				winevent(t->w, "%c0 0 0 0 \n", c);
207 		}
208 		free(r);
209 		free(aa);
210 		free(a);
211 		return;
212 	}
213 	if(e){
214 		if(e->mark && seltext!=nil)
215 		if(seltext->what == Body){
216 			seq++;
217 			filemark(seltext->w->body.file);
218 		}
219 		s = skipbl(r, q1-q0, &n);
220 		s = findbl(s, n, &n);
221 		s = skipbl(s, n, &n);
222 		(*e->fn)(t, seltext, argt, e->flag1, e->flag2, s, n);
223 		free(r);
224 		return;
225 	}
226 
227 	b = runetobyte(r, q1-q0);
228 	free(r);
229 	dir = dirname(t, nil, 0);
230 	if(dir.nr==1 && dir.r[0]=='.'){	/* sigh */
231 		free(dir.r);
232 		dir.r = nil;
233 		dir.nr = 0;
234 	}
235 	aa = getbytearg(argt, TRUE, TRUE, &a);
236 	if(t->w)
237 		incref(&t->w->ref);
238 	run(t->w, b, dir.r, dir.nr, TRUE, aa, a, FALSE);
239 }
240 
241 char*
242 printarg(Text *argt, uint q0, uint q1)
243 {
244 	char *buf;
245 
246 	if(argt->what!=Body || argt->file->name==nil)
247 		return nil;
248 	buf = emalloc(argt->file->nname+32);
249 	if(q0 == q1)
250 		sprint(buf, "%.*S:#%d", argt->file->nname, argt->file->name, q0);
251 	else
252 		sprint(buf, "%.*S:#%d,#%d", argt->file->nname, argt->file->name, q0, q1);
253 	return buf;
254 }
255 
256 char*
257 getarg(Text *argt, int doaddr, int dofile, Rune **rp, int *nrp)
258 {
259 	int n;
260 	Expand e;
261 	char *a;
262 
263 	*rp = nil;
264 	*nrp = 0;
265 	if(argt == nil)
266 		return nil;
267 	a = nil;
268 	textcommit(argt, TRUE);
269 	if(expand(argt, argt->q0, argt->q1, &e)){
270 		free(e.bname);
271 		if(e.nname && dofile){
272 			e.name = runerealloc(e.name, e.nname+1);
273 			if(doaddr)
274 				a = printarg(argt, e.q0, e.q1);
275 			*rp = e.name;
276 			*nrp = e.nname;
277 			return a;
278 		}
279 		free(e.name);
280 	}else{
281 		e.q0 = argt->q0;
282 		e.q1 = argt->q1;
283 	}
284 	n = e.q1 - e.q0;
285 	*rp = runemalloc(n+1);
286 	bufread(&argt->file->b, e.q0, *rp, n);
287 	if(doaddr)
288 		a = printarg(argt, e.q0, e.q1);
289 	*nrp = n;
290 	return a;
291 }
292 
293 char*
294 getbytearg(Text *argt, int doaddr, int dofile, char **bp)
295 {
296 	Rune *r;
297 	int n;
298 	char *aa;
299 
300 	*bp = nil;
301 	aa = getarg(argt, doaddr, dofile, &r, &n);
302 	if(r == nil)
303 		return nil;
304 	*bp = runetobyte(r, n);
305 	free(r);
306 	return aa;
307 }
308 
309 void
310 newcol(Text *et, Text *_0, Text *_1, int _2, int _3, Rune *_4, int _5)
311 {
312 	Column *c;
313 
314 	USED(_0);
315 	USED(_1);
316 	USED(_2);
317 	USED(_3);
318 	USED(_4);
319 	USED(_5);
320 
321 	c = rowadd(et->row, nil, -1);
322 	if(c)
323 		winsettag(coladd(c, nil, nil, -1));
324 }
325 
326 void
327 delcol(Text *et, Text *_0, Text *_1, int _2, int _3, Rune *_4, int _5)
328 {
329 	int i;
330 	Column *c;
331 	Window *w;
332 
333 	USED(_0);
334 	USED(_1);
335 	USED(_2);
336 	USED(_3);
337 	USED(_4);
338 	USED(_5);
339 
340 	c = et->col;
341 	if(c==nil || colclean(c)==0)
342 		return;
343 	for(i=0; i<c->nw; i++){
344 		w = c->w[i];
345 		if(w->nopen[QWevent]+w->nopen[QWaddr]+w->nopen[QWdata]+w->nopen[QWxdata] > 0){
346 			warning(nil, "can't delete column; %.*S is running an external command\n", w->body.file->nname, w->body.file->name);
347 			return;
348 		}
349 	}
350 	rowclose(et->col->row, et->col, TRUE);
351 }
352 
353 void
354 del(Text *et, Text *_0, Text *_1, int flag1, int _2, Rune *_3, int _4)
355 {
356 	USED(_0);
357 	USED(_1);
358 	USED(_2);
359 	USED(_3);
360 	USED(_4);
361 
362 	if(et->col==nil || et->w == nil)
363 		return;
364 	if(flag1 || et->w->body.file->ntext>1 || winclean(et->w, FALSE))
365 		colclose(et->col, et->w, TRUE);
366 }
367 
368 void
369 sort(Text *et, Text *_0, Text *_1, int _2, int _3, Rune *_4, int _5)
370 {
371 	USED(_0);
372 	USED(_1);
373 	USED(_2);
374 	USED(_3);
375 	USED(_4);
376 	USED(_5);
377 
378 	if(et->col)
379 		colsort(et->col);
380 }
381 
382 uint
383 seqof(Window *w, int isundo)
384 {
385 	/* if it's undo, see who changed with us */
386 	if(isundo)
387 		return w->body.file->seq;
388 	/* if it's redo, see who we'll be sync'ed up with */
389 	return fileredoseq(w->body.file);
390 }
391 
392 void
393 undo(Text *et, Text *_0, Text *_1, int flag1, int _2, Rune *_3, int _4)
394 {
395 	int i, j;
396 	Column *c;
397 	Window *w;
398 	uint seq;
399 
400 	USED(_0);
401 	USED(_1);
402 	USED(_2);
403 	USED(_3);
404 	USED(_4);
405 
406 	if(et==nil || et->w== nil)
407 		return;
408 	seq = seqof(et->w, flag1);
409 	if(seq == 0){
410 		/* nothing to undo */
411 		return;
412 	}
413 	/*
414 	 * Undo the executing window first. Its display will update. other windows
415 	 * in the same file will not call show() and jump to a different location in the file.
416 	 * Simultaneous changes to other files will be chaotic, however.
417 	 */
418 	winundo(et->w, flag1);
419 	for(i=0; i<row.ncol; i++){
420 		c = row.col[i];
421 		for(j=0; j<c->nw; j++){
422 			w = c->w[j];
423 			if(w == et->w)
424 				continue;
425 			if(seqof(w, flag1) == seq)
426 				winundo(w, flag1);
427 		}
428 	}
429 }
430 
431 char*
432 getname(Text *t, Text *argt, Rune *arg, int narg, int isput)
433 {
434 	char *s;
435 	Rune *r;
436 	int i, n, promote;
437 	Runestr dir;
438 
439 	getarg(argt, FALSE, TRUE, &r, &n);
440 	promote = FALSE;
441 	if(r == nil)
442 		promote = TRUE;
443 	else if(isput){
444 		/* if are doing a Put, want to synthesize name even for non-existent file */
445 		/* best guess is that file name doesn't contain a slash */
446 		promote = TRUE;
447 		for(i=0; i<n; i++)
448 			if(r[i] == '/'){
449 				promote = FALSE;
450 				break;
451 			}
452 		if(promote){
453 			t = argt;
454 			arg = r;
455 			narg = n;
456 		}
457 	}
458 	if(promote){
459 		n = narg;
460 		if(n <= 0){
461 			s = runetobyte(t->file->name, t->file->nname);
462 			return s;
463 		}
464 		/* prefix with directory name if necessary */
465 		dir.r = nil;
466 		dir.nr = 0;
467 		if(n>0 && arg[0]!='/'){
468 			dir = dirname(t, nil, 0);
469 			if(dir.nr==1 && dir.r[0]=='.'){	/* sigh */
470 				free(dir.r);
471 				dir.r = nil;
472 				dir.nr = 0;
473 			}
474 		}
475 		if(dir.r){
476 			r = runemalloc(dir.nr+n+1);
477 			runemove(r, dir.r, dir.nr);
478 			free(dir.r);
479 			if(dir.nr>0 && r[dir.nr]!='/' && n>0 && arg[0]!='/')
480 				r[dir.nr++] = '/';
481 			runemove(r+dir.nr, arg, n);
482 			n += dir.nr;
483 		}else{
484 			r = runemalloc(n+1);
485 			runemove(r, arg, n);
486 		}
487 	}
488 	s = runetobyte(r, n);
489 	free(r);
490 	if(strlen(s) == 0){
491 		free(s);
492 		s = nil;
493 	}
494 	return s;
495 }
496 
497 void
498 zeroxx(Text *et, Text *t, Text *_1, int _2, int _3, Rune *_4, int _5)
499 {
500 	Window *nw;
501 	int c, locked;
502 
503 	USED(_1);
504 	USED(_2);
505 	USED(_3);
506 	USED(_4);
507 	USED(_5);
508 
509 	locked = FALSE;
510 	if(t!=nil && t->w!=nil && t->w!=et->w){
511 		locked = TRUE;
512 		c = 'M';
513 		if(et->w)
514 			c = et->w->owner;
515 		winlock(t->w, c);
516 	}
517 	if(t == nil)
518 		t = et;
519 	if(t==nil || t->w==nil)
520 		return;
521 	t = &t->w->body;
522 	if(t->w->isdir)
523 		warning(nil, "%.*S is a directory; Zerox illegal\n", t->file->nname, t->file->name);
524 	else{
525 		nw = coladd(t->w->col, nil, t->w, -1);
526 		/* ugly: fix locks so w->unlock works */
527 		winlock1(nw, t->w->owner);
528 	}
529 	if(locked)
530 		winunlock(t->w);
531 }
532 
533 void
534 get(Text *et, Text *t, Text *argt, int flag1, int _0, Rune *arg, int narg)
535 {
536 	char *name;
537 	Rune *r;
538 	int i, n, dirty, samename, isdir;
539 	Window *w;
540 	Text *u;
541 	Dir *d;
542 
543 	USED(_0);
544 
545 	if(flag1)
546 		if(et==nil || et->w==nil)
547 			return;
548 	if(!et->w->isdir && (et->w->body.file->b.nc>0 && !winclean(et->w, TRUE)))
549 		return;
550 	w = et->w;
551 	t = &w->body;
552 	name = getname(t, argt, arg, narg, FALSE);
553 	if(name == nil){
554 		warning(nil, "no file name\n");
555 		return;
556 	}
557 	if(t->file->ntext>1){
558 		d = dirstat(name);
559 		isdir = (d!=nil && (d->qid.type & QTDIR));
560 		free(d);
561 		if(isdir){
562 			warning(nil, "%s is a directory; can't read with multiple windows on it\n", name);
563 			return;
564 		}
565 	}
566 	r = bytetorune(name, &n);
567 	for(i=0; i<t->file->ntext; i++){
568 		u = t->file->text[i];
569 		/* second and subsequent calls with zero an already empty buffer, but OK */
570 		textreset(u);
571 		windirfree(u->w);
572 	}
573 	samename = runeeq(r, n, t->file->name, t->file->nname);
574 	textload(t, 0, name, samename);
575 	if(samename){
576 		t->file->mod = FALSE;
577 		dirty = FALSE;
578 	}else{
579 		t->file->mod = TRUE;
580 		dirty = TRUE;
581 	}
582 	for(i=0; i<t->file->ntext; i++)
583 		t->file->text[i]->w->dirty = dirty;
584 	free(name);
585 	free(r);
586 	winsettag(w);
587 	t->file->unread = FALSE;
588 	for(i=0; i<t->file->ntext; i++){
589 		u = t->file->text[i];
590 		textsetselect(&u->w->tag, u->w->tag.file->b.nc, u->w->tag.file->b.nc);
591 		textscrdraw(u);
592 	}
593 }
594 
595 void
596 putfile(File *f, int q0, int q1, Rune *namer, int nname)
597 {
598 	uint n, m;
599 	Rune *r;
600 	char *s, *name;
601 	int i, fd, q;
602 	Dir *d, *d1;
603 	Window *w;
604 	int isapp;
605 
606 	w = f->curtext->w;
607 	name = runetobyte(namer, nname);
608 	d = dirstat(name);
609 	if(d!=nil && runeeq(namer, nname, f->name, f->nname)){
610 		/* f->mtime+1 because when talking over NFS it's often off by a second */
611 		if(f->dev!=d->dev || f->qidpath!=d->qid.path || f->mtime+1<d->mtime){
612 			f->dev = d->dev;
613 			f->qidpath = d->qid.path;
614 			f->mtime = d->mtime;
615 			if(f->unread)
616 				warning(nil, "%s not written; file already exists\n", name);
617 			else
618 				warning(nil, "%s modified%s%s since last read\n", name, d->muid[0]?" by ":"", d->muid);
619 			goto Rescue1;
620 		}
621 	}
622 	fd = create(name, OWRITE, 0666);
623 	if(fd < 0){
624 		warning(nil, "can't create file %s: %r\n", name);
625 		goto Rescue1;
626 	}
627 	r = fbufalloc();
628 	s = fbufalloc();
629 	free(d);
630 	d = dirfstat(fd);
631 	isapp = (d!=nil && d->length>0 && (d->qid.type&QTAPPEND));
632 	if(isapp){
633 		warning(nil, "%s not written; file is append only\n", name);
634 		goto Rescue2;
635 	}
636 
637 	for(q=q0; q<q1; q+=n){
638 		n = q1 - q;
639 		if(n > BUFSIZE/UTFmax)
640 			n = BUFSIZE/UTFmax;
641 		bufread(&f->b, q, r, n);
642 		m = snprint(s, BUFSIZE+1, "%.*S", n, r);
643 		if(write(fd, s, m) != m){
644 			warning(nil, "can't write file %s: %r\n", name);
645 			goto Rescue2;
646 		}
647 	}
648 	if(runeeq(namer, nname, f->name, f->nname)){
649 		if(q0!=0 || q1!=f->b.nc){
650 			f->mod = TRUE;
651 			w->dirty = TRUE;
652 			f->unread = TRUE;
653 		}else{
654 			d1 = dirfstat(fd);
655 			if(d1 != nil){
656 				free(d);
657 				d = d1;
658 			}
659 			f->qidpath = d->qid.path;
660 			f->dev = d->dev;
661 			f->mtime = d->mtime;
662 			f->mod = FALSE;
663 			w->dirty = FALSE;
664 			f->unread = FALSE;
665 		}
666 		for(i=0; i<f->ntext; i++){
667 			f->text[i]->w->putseq = f->seq;
668 			f->text[i]->w->dirty = w->dirty;
669 		}
670 	}
671 	fbuffree(s);
672 	fbuffree(r);
673 	free(d);
674 	free(namer);
675 	free(name);
676 	close(fd);
677 	winsettag(w);
678 	return;
679 
680     Rescue2:
681 	fbuffree(s);
682 	fbuffree(r);
683 	close(fd);
684 	/* fall through */
685 
686     Rescue1:
687 	free(d);
688 	free(namer);
689 	free(name);
690 }
691 
692 void
693 put(Text *et, Text *_0, Text *argt, int _1, int _2, Rune *arg, int narg)
694 {
695 	int nname;
696 	Rune  *namer;
697 	Window *w;
698 	File *f;
699 	char *name;
700 
701 	USED(_0);
702 	USED(_1);
703 	USED(_2);
704 
705 	if(et==nil || et->w==nil || et->w->isdir)
706 		return;
707 	w = et->w;
708 	f = w->body.file;
709 	name = getname(&w->body, argt, arg, narg, TRUE);
710 	if(name == nil){
711 		warning(nil, "no file name\n");
712 		return;
713 	}
714 	namer = bytetorune(name, &nname);
715 	putfile(f, 0, f->b.nc, namer, nname);
716 	free(name);
717 }
718 
719 void
720 dump(Text *_0, Text *_1, Text *argt, int isdump, int _2, Rune *arg, int narg)
721 {
722 	char *name;
723 
724 	USED(_0);
725 	USED(_1);
726 	USED(_2);
727 
728 	if(narg)
729 		name = runetobyte(arg, narg);
730 	else
731 		getbytearg(argt, FALSE, TRUE, &name);
732 	if(isdump)
733 		rowdump(&row, name);
734 	else
735 		rowload(&row, name, FALSE);
736 	free(name);
737 }
738 
739 void
740 cut(Text *et, Text *t, Text *_0, int dosnarf, int docut, Rune *_2, int _3)
741 {
742 	uint q0, q1, n, locked, c;
743 	Rune *r;
744 
745 	USED(_0);
746 	USED(_2);
747 	USED(_3);
748 
749 	/* use current window if snarfing and its selection is non-null */
750 	if(et!=t && dosnarf && et->w!=nil){
751 		if(et->w->body.q1>et->w->body.q0){
752 			t = &et->w->body;
753 			if(docut)
754 				filemark(t->file);	/* seq has been incremented by execute */
755 		}else if(et->w->tag.q1>et->w->tag.q0)
756 			t = &et->w->tag;
757 	}
758 	if(t == nil){
759 		/* can only happen if seltext == nil */
760 		return;
761 	}
762 	locked = FALSE;
763 	if(t->w!=nil && et->w!=t->w){
764 		locked = TRUE;
765 		c = 'M';
766 		if(et->w)
767 			c = et->w->owner;
768 		winlock(t->w, c);
769 	}
770 	if(t->q0 == t->q1){
771 		if(locked)
772 			winunlock(t->w);
773 		return;
774 	}
775 	if(dosnarf){
776 		q0 = t->q0;
777 		q1 = t->q1;
778 		bufdelete(&snarfbuf, 0, snarfbuf.nc);
779 		r = fbufalloc();
780 		while(q0 < q1){
781 			n = q1 - q0;
782 			if(n > RBUFSIZE)
783 				n = RBUFSIZE;
784 			bufread(&t->file->b, q0, r, n);
785 			bufinsert(&snarfbuf, snarfbuf.nc, r, n);
786 			q0 += n;
787 		}
788 		fbuffree(r);
789 		acmeputsnarf();
790 	}
791 	if(docut){
792 		textdelete(t, t->q0, t->q1, TRUE);
793 		textsetselect(t, t->q0, t->q0);
794 		if(t->w){
795 			textscrdraw(t);
796 			winsettag(t->w);
797 		}
798 	}else if(dosnarf)	/* Snarf command */
799 		argtext = t;
800 	if(locked)
801 		winunlock(t->w);
802 }
803 
804 void
805 paste(Text *et, Text *t, Text *_0, int selectall, int tobody, Rune *_1, int _2)
806 {
807 	int c;
808 	uint q, q0, q1, n;
809 	Rune *r;
810 
811 	USED(_0);
812 	USED(_1);
813 	USED(_2);
814 
815 	/* if(tobody), use body of executing window  (Paste or Send command) */
816 	if(tobody && et!=nil && et->w!=nil){
817 		t = &et->w->body;
818 		filemark(t->file);	/* seq has been incremented by execute */
819 	}
820 	if(t == nil)
821 		return;
822 
823 	acmegetsnarf();
824 	if(t==nil || snarfbuf.nc==0)
825 		return;
826 	if(t->w!=nil && et->w!=t->w){
827 		c = 'M';
828 		if(et->w)
829 			c = et->w->owner;
830 		winlock(t->w, c);
831 	}
832 	cut(t, t, nil, FALSE, TRUE, nil, 0);
833 	q = 0;
834 	q0 = t->q0;
835 	q1 = t->q0+snarfbuf.nc;
836 	r = fbufalloc();
837 	while(q0 < q1){
838 		n = q1 - q0;
839 		if(n > RBUFSIZE)
840 			n = RBUFSIZE;
841 		if(r == nil)
842 			r = runemalloc(n);
843 		bufread(&snarfbuf, q, r, n);
844 		textinsert(t, q0, r, n, TRUE);
845 		q += n;
846 		q0 += n;
847 	}
848 	fbuffree(r);
849 	if(selectall)
850 		textsetselect(t, t->q0, q1);
851 	else
852 		textsetselect(t, q1, q1);
853 	if(t->w){
854 		textscrdraw(t);
855 		winsettag(t->w);
856 	}
857 	if(t->w!=nil && et->w!=t->w)
858 		winunlock(t->w);
859 }
860 
861 void
862 look(Text *et, Text *t, Text *argt, int _0, int _1, Rune *arg, int narg)
863 {
864 	Rune *r;
865 	int n;
866 
867 	USED(_0);
868 	USED(_1);
869 
870 	if(et && et->w){
871 		t = &et->w->body;
872 		if(narg > 0){
873 			search(t, arg, narg);
874 			return;
875 		}
876 		getarg(argt, FALSE, FALSE, &r, &n);
877 		if(r == nil){
878 			n = t->q1-t->q0;
879 			r = runemalloc(n);
880 			bufread(&t->file->b, t->q0, r, n);
881 		}
882 		search(t, r, n);
883 		free(r);
884 	}
885 }
886 
887 static Rune Lnl[] = { '\n', 0 };
888 
889 void
890 sendx(Text *et, Text *t, Text *_0, int _1, int _2, Rune *_3, int _4)
891 {
892 	USED(_0);
893 	USED(_1);
894 	USED(_2);
895 	USED(_3);
896 	USED(_4);
897 
898 	if(et->w==nil)
899 		return;
900 	t = &et->w->body;
901 	if(t->q0 != t->q1)
902 		cut(t, t, nil, TRUE, FALSE, nil, 0);
903 	textsetselect(t, t->file->b.nc, t->file->b.nc);
904 	paste(t, t, nil, TRUE, TRUE, nil, 0);
905 	if(textreadc(t, t->file->b.nc-1) != '\n'){
906 		textinsert(t, t->file->b.nc, Lnl, 1, TRUE);
907 		textsetselect(t, t->file->b.nc, t->file->b.nc);
908 	}
909 }
910 
911 void
912 edit(Text *et, Text *_0, Text *argt, int _1, int _2, Rune *arg, int narg)
913 {
914 	Rune *r;
915 	int len;
916 
917 	USED(_0);
918 	USED(_1);
919 	USED(_2);
920 
921 	if(et == nil)
922 		return;
923 	getarg(argt, FALSE, TRUE, &r, &len);
924 	seq++;
925 	if(r != nil){
926 		editcmd(et, r, len);
927 		free(r);
928 	}else
929 		editcmd(et, arg, narg);
930 }
931 
932 void
933 xexit(Text *et, Text *_0, Text *_1, int _2, int _3, Rune *_4, int _5)
934 {
935 	USED(et);
936 	USED(_0);
937 	USED(_1);
938 	USED(_2);
939 	USED(_3);
940 	USED(_4);
941 	USED(_5);
942 
943 	if(rowclean(&row)){
944 		sendul(cexit, 0);
945 		threadexits(nil);
946 	}
947 }
948 
949 void
950 putall(Text *et, Text *_0, Text *_1, int _2, int _3, Rune *_4, int _5)
951 {
952 	int i, j, e;
953 	Window *w;
954 	Column *c;
955 	char *a;
956 
957 	USED(et);
958 	USED(_0);
959 	USED(_1);
960 	USED(_2);
961 	USED(_3);
962 	USED(_4);
963 	USED(_5);
964 
965 	for(i=0; i<row.ncol; i++){
966 		c = row.col[i];
967 		for(j=0; j<c->nw; j++){
968 			w = c->w[j];
969 			if(w->isscratch || w->isdir || w->body.file->nname==0)
970 				continue;
971 			if(w->nopen[QWevent] > 0)
972 				continue;
973 			a = runetobyte(w->body.file->name, w->body.file->nname);
974 			e = access(a, 0);
975 			if(w->body.file->mod || w->body.ncache)
976 				if(e < 0)
977 					warning(nil, "no auto-Put of %s: %r\n", a);
978 				else{
979 					wincommit(w, &w->body);
980 					put(&w->body, nil, nil, XXX, XXX, nil, 0);
981 				}
982 			free(a);
983 		}
984 	}
985 }
986 
987 
988 void
989 id(Text *et, Text *_0, Text *_1, int _2, int _3, Rune *_4, int _5)
990 {
991 	USED(et);
992 	USED(_0);
993 	USED(_1);
994 	USED(_2);
995 	USED(_3);
996 	USED(_4);
997 	USED(_5);
998 
999 	if(et && et->w)
1000 		warning(nil, "/mnt/acme/%d/\n", et->w->id);
1001 }
1002 
1003 void
1004 local(Text *et, Text *_0, Text *argt, int _1, int _2, Rune *arg, int narg)
1005 {
1006 	char *a, *aa;
1007 	Runestr dir;
1008 
1009 	USED(_0);
1010 	USED(_1);
1011 	USED(_2);
1012 
1013 	aa = getbytearg(argt, TRUE, TRUE, &a);
1014 
1015 	dir = dirname(et, nil, 0);
1016 	if(dir.nr==1 && dir.r[0]=='.'){	/* sigh */
1017 		free(dir.r);
1018 		dir.r = nil;
1019 		dir.nr = 0;
1020 	}
1021 	run(nil, runetobyte(arg, narg), dir.r, dir.nr, FALSE, aa, a, FALSE);
1022 }
1023 
1024 void
1025 xkill(Text *_0, Text *_1, Text *argt, int _2, int _3, Rune *arg, int narg)
1026 {
1027 	Rune *a, *cmd, *r;
1028 	int na;
1029 
1030 	USED(_0);
1031 	USED(_1);
1032 	USED(_2);
1033 	USED(_3);
1034 
1035 	getarg(argt, FALSE, FALSE, &r, &na);
1036 	if(r)
1037 		xkill(nil, nil, nil, 0, 0, r, na);
1038 	/* loop condition: *arg is not a blank */
1039 	for(;;){
1040 		a = findbl(arg, narg, &na);
1041 		if(a == arg)
1042 			break;
1043 		cmd = runemalloc(narg-na+1);
1044 		runemove(cmd, arg, narg-na);
1045 		sendp(ckill, cmd);
1046 		arg = skipbl(a, na, &narg);
1047 	}
1048 }
1049 
1050 static Rune Lfix[] = { 'f', 'i', 'x', 0 };
1051 static Rune Lvar[] = { 'v', 'a', 'r', 0 };
1052 
1053 void
1054 fontx(Text *et, Text *t, Text *argt, int _0, int _1, Rune *arg, int narg)
1055 {
1056 	Rune *a, *r, *flag, *file;
1057 	int na, nf;
1058 	char *aa;
1059 	Reffont *newfont;
1060 	Dirlist *dp;
1061 	int i, fix;
1062 
1063 	USED(_0);
1064 	USED(_1);
1065 
1066 	if(et==nil || et->w==nil)
1067 		return;
1068 	t = &et->w->body;
1069 	flag = nil;
1070 	file = nil;
1071 	/* loop condition: *arg is not a blank */
1072 	nf = 0;
1073 	for(;;){
1074 		a = findbl(arg, narg, &na);
1075 		if(a == arg)
1076 			break;
1077 		r = runemalloc(narg-na+1);
1078 		runemove(r, arg, narg-na);
1079 		if(runeeq(r, narg-na, Lfix, 3) || runeeq(r, narg-na, Lvar, 3)){
1080 			free(flag);
1081 			flag = r;
1082 		}else{
1083 			free(file);
1084 			file = r;
1085 			nf = narg-na;
1086 		}
1087 		arg = skipbl(a, na, &narg);
1088 	}
1089 	getarg(argt, FALSE, TRUE, &r, &na);
1090 	if(r)
1091 		if(runeeq(r, na, Lfix, 3) || runeeq(r, na, Lvar, 3)){
1092 			free(flag);
1093 			flag = r;
1094 		}else{
1095 			free(file);
1096 			file = r;
1097 			nf = na;
1098 		}
1099 	fix = 1;
1100 	if(flag)
1101 		fix = runeeq(flag, runestrlen(flag), Lfix, 3);
1102 	else if(file == nil){
1103 		newfont = rfget(FALSE, FALSE, FALSE, nil);
1104 		if(newfont)
1105 			fix = strcmp(newfont->f->name, t->fr.font->name)==0;
1106 	}
1107 	if(file){
1108 		aa = runetobyte(file, nf);
1109 		newfont = rfget(fix, flag!=nil, FALSE, aa);
1110 		free(aa);
1111 	}else
1112 		newfont = rfget(fix, FALSE, FALSE, nil);
1113 	if(newfont){
1114 		draw(screen, t->w->r, textcols[BACK], nil, ZP);
1115 		rfclose(t->reffont);
1116 		t->reffont = newfont;
1117 		t->fr.font = newfont->f;
1118 		frinittick(&t->fr);
1119 		if(t->w->isdir){
1120 			t->all.min.x++;	/* force recolumnation; disgusting! */
1121 			for(i=0; i<t->w->ndl; i++){
1122 				dp = t->w->dlp[i];
1123 				aa = runetobyte(dp->r, dp->nr);
1124 				dp->wid = stringwidth(newfont->f, aa);
1125 				free(aa);
1126 			}
1127 		}
1128 		/* avoid shrinking of window due to quantization */
1129 		colgrow(t->w->col, t->w, -1);
1130 	}
1131 	free(file);
1132 	free(flag);
1133 }
1134 
1135 void
1136 incl(Text *et, Text *_0, Text *argt, int _1, int _2, Rune *arg, int narg)
1137 {
1138 	Rune *a, *r;
1139 	Window *w;
1140 	int na, n, len;
1141 
1142 	USED(_0);
1143 	USED(_1);
1144 	USED(_2);
1145 
1146 	if(et==nil || et->w==nil)
1147 		return;
1148 	w = et->w;
1149 	n = 0;
1150 	getarg(argt, FALSE, TRUE, &r, &len);
1151 	if(r){
1152 		n++;
1153 		winaddincl(w, r, len);
1154 	}
1155 	/* loop condition: *arg is not a blank */
1156 	for(;;){
1157 		a = findbl(arg, narg, &na);
1158 		if(a == arg)
1159 			break;
1160 		r = runemalloc(narg-na+1);
1161 		runemove(r, arg, narg-na);
1162 		n++;
1163 		winaddincl(w, r, narg-na);
1164 		arg = skipbl(a, na, &narg);
1165 	}
1166 	if(n==0 && w->nincl){
1167 		for(n=w->nincl; --n>=0; )
1168 			warning(nil, "%S ", w->incl[n]);
1169 		warning(nil, "\n");
1170 	}
1171 }
1172 
1173 static Rune LON[] = { 'O', 'N', 0 };
1174 static Rune LOFF[] = { 'O', 'F', 'F', 0 };
1175 static Rune Lon[] = { 'o', 'n', 0 };
1176 
1177 enum {
1178 	IGlobal = -2,
1179 	IError = -1,
1180 	Ion = 0,
1181 	Ioff = 1,
1182 };
1183 
1184 static int
1185 indentval(Rune *s, int n)
1186 {
1187 	if(n < 2)
1188 		return IError;
1189 	if(runestrncmp(s, LON, n) == 0){
1190 		globalautoindent = TRUE;
1191 		warning(nil, "Indent ON\n");
1192 		return IGlobal;
1193 	}
1194 	if(runestrncmp(s, LOFF, n) == 0){
1195 		globalautoindent = FALSE;
1196 		warning(nil, "Indent OFF\n");
1197 		return IGlobal;
1198 	}
1199 	return runestrncmp(s, Lon, n) == 0;
1200 }
1201 
1202 void
1203 indent(Text *et, Text *_0, Text *argt, int _1, int _2, Rune *arg, int narg)
1204 {
1205 	Rune *a, *r;
1206 	Window *w;
1207 	int na, len, autoindent;
1208 
1209 	USED(_0);
1210 	USED(_1);
1211 	USED(_2);
1212 
1213 	w = nil;
1214 	if(et!=nil && et->w!=nil)
1215 		w = et->w;
1216 	autoindent = IError;
1217 	getarg(argt, FALSE, TRUE, &r, &len);
1218 	if(r!=nil && len>0)
1219 		autoindent = indentval(r, len);
1220 	else{
1221 		a = findbl(arg, narg, &na);
1222 		if(a != arg)
1223 			autoindent = indentval(arg, narg-na);
1224 	}
1225 	if(w != nil){
1226 		switch(autoindent){
1227 		case Ion:
1228 		case Ioff:
1229 			w->autoindent = autoindent;
1230 			break;
1231 		case IGlobal:
1232 			w->autoindent = globalautoindent;
1233 			break;
1234 		}
1235 	}
1236 }
1237 
1238 void
1239 tab(Text *et, Text *_0, Text *argt, int _1, int _2, Rune *arg, int narg)
1240 {
1241 	Rune *a, *r;
1242 	Window *w;
1243 	int na, len, tab;
1244 	char *p;
1245 
1246 	USED(_0);
1247 	USED(_1);
1248 	USED(_2);
1249 
1250 	if(et==nil || et->w==nil)
1251 		return;
1252 	w = et->w;
1253 	getarg(argt, FALSE, TRUE, &r, &len);
1254 	tab = 0;
1255 	if(r!=nil && len>0){
1256 		p = runetobyte(r, len);
1257 		if('0'<=p[0] && p[0]<='9')
1258 			tab = atoi(p);
1259 		free(p);
1260 	}else{
1261 		a = findbl(arg, narg, &na);
1262 		if(a != arg){
1263 			p = runetobyte(arg, narg-na);
1264 			if('0'<=p[0] && p[0]<='9')
1265 				tab = atoi(p);
1266 			free(p);
1267 		}
1268 	}
1269 	if(tab > 0){
1270 		if(w->body.tabstop != tab){
1271 			w->body.tabstop = tab;
1272 			winresize(w, w->r, 1);
1273 		}
1274 	}else
1275 		warning(nil, "%.*S: Tab %d\n", w->body.file->nname, w->body.file->name, w->body.tabstop);
1276 }
1277 
1278 void
1279 runproc(void *argvp)
1280 {
1281 	/* args: */
1282 		Window *win;
1283 		char *s;
1284 		Rune *rdir;
1285 		int ndir;
1286 		int newns;
1287 		char *argaddr;
1288 		char *arg;
1289 		Command *c;
1290 		Channel *cpid;
1291 		int iseditcmd;
1292 	/* end of args */
1293 	char *e, *t, *name, *filename, *dir, **av, *news;
1294 	Rune r, **incl;
1295 	int ac, w, inarg, i, n, fd, nincl, winid;
1296 	int sfd[3];
1297 	int pipechar;
1298 	char buf[512];
1299 	int olddir;
1300 	int ret;
1301 	//static void *parg[2];
1302 	char *rcarg[4];
1303 	void **argv;
1304 	Fsys *fs;
1305 
1306 	argv = argvp;
1307 	win = argv[0];
1308 	s = argv[1];
1309 	rdir = argv[2];
1310 	ndir = (int)argv[3];
1311 	newns = (int)argv[4];
1312 	argaddr = argv[5];
1313 	arg = argv[6];
1314 	c = argv[7];
1315 	cpid = argv[8];
1316 	iseditcmd = (int)argv[9];
1317 	free(argv);
1318 
1319 	t = s;
1320 	while(*t==' ' || *t=='\n' || *t=='\t')
1321 		t++;
1322 	for(e=t; *e; e++)
1323 		if(*e==' ' || *e=='\n' || *e=='\t' )
1324 			break;
1325 	name = emalloc((e-t)+2);
1326 	memmove(name, t, e-t);
1327 	name[e-t] = 0;
1328 	e = utfrrune(name, '/');
1329 	if(e)
1330 		memmove(name, e+1, strlen(e+1)+1);	/* strcpy but overlaps */
1331 	strcat(name, " ");	/* add blank here for ease in waittask */
1332 	c->name = bytetorune(name, &c->nname);
1333 	free(name);
1334 	pipechar = 0;
1335 	if(*t=='<' || *t=='|' || *t=='>')
1336 		pipechar = *t++;
1337 	c->iseditcmd = iseditcmd;
1338 	c->text = s;
1339 	if(newns){
1340 		nincl = 0;
1341 		incl = nil;
1342 		if(win){
1343 			filename = smprint("%.*S", win->body.file->nname, win->body.file->name);
1344 			nincl = win->nincl;
1345 			if(nincl > 0){
1346 				incl = emalloc(nincl*sizeof(Rune*));
1347 				for(i=0; i<nincl; i++){
1348 					n = runestrlen(win->incl[i]);
1349 					incl[i] = runemalloc(n+1);
1350 					runemove(incl[i], win->incl[i], n);
1351 				}
1352 			}
1353 			winid = win->id;
1354 		}else{
1355 			filename = nil;
1356 			winid = 0;
1357 			if(activewin)
1358 				winid = activewin->id;
1359 		}
1360 		rfork(RFNAMEG|RFENVG|RFFDG|RFNOTEG);
1361 		sprint(buf, "%d", winid);
1362 		putenv("winid", buf);
1363 
1364 		if(filename){
1365 			putenv("%", filename);
1366 			free(filename);
1367 		}
1368 		c->md = fsysmount(rdir, ndir, incl, nincl);
1369 		if(c->md == nil){
1370 			fprint(2, "child: can't allocate mntdir: %r\n");
1371 			threadexits("fsysmount");
1372 		}
1373 		sprint(buf, "%d", c->md->id);
1374 		if((fs = nsmount("acme", buf)) == nil){
1375 			fprint(2, "child: can't mount acme: %r\n");
1376 			fsysdelid(c->md);
1377 			c->md = nil;
1378 			threadexits("nsmount");
1379 		}
1380 		if(winid>0 && (pipechar=='|' || pipechar=='>')){
1381 			sprint(buf, "%d/rdsel", winid);
1382 			sfd[0] = fsopenfd(fs, buf, OREAD);
1383 		}else
1384 			sfd[0] = open("/dev/null", OREAD);
1385 		if((winid>0 || iseditcmd) && (pipechar=='|' || pipechar=='<')){
1386 			if(iseditcmd){
1387 				if(winid > 0)
1388 					sprint(buf, "%d/editout", winid);
1389 				else
1390 					sprint(buf, "editout");
1391 			}else
1392 				sprint(buf, "%d/wrsel", winid);
1393 			sfd[1] = fsopenfd(fs, buf, OWRITE);
1394 			sfd[2] = fsopenfd(fs, "cons", OWRITE);
1395 		}else{
1396 			sfd[1] = fsopenfd(fs, "cons", OWRITE);
1397 			sfd[2] = sfd[1];
1398 		}
1399 		fsunmount(fs);
1400 	}else{
1401 		rfork(RFFDG|RFNOTEG);
1402 		fsysclose();
1403 		sfd[0] = open("/dev/null", OREAD);
1404 		sfd[1] = open("/dev/null", OWRITE);
1405 		sfd[2] = dup(erroutfd, -1);
1406 	}
1407 	if(win)
1408 		winclose(win);
1409 
1410 	if(argaddr)
1411 		putenv("acmeaddr", argaddr);
1412 	if(strlen(t) > sizeof buf-10)	/* may need to print into stack */
1413 		goto Hard;
1414 	inarg = FALSE;
1415 	for(e=t; *e; e+=w){
1416 		w = chartorune(&r, e);
1417 		if(r==' ' || r=='\t')
1418 			continue;
1419 		if(r < ' ')
1420 			goto Hard;
1421 		if(utfrune("#;&|^$=`'{}()<>[]*?^~`", r))
1422 			goto Hard;
1423 		inarg = TRUE;
1424 	}
1425 	if(!inarg)
1426 		goto Fail;
1427 
1428 	ac = 0;
1429 	av = nil;
1430 	inarg = FALSE;
1431 	for(e=t; *e; e+=w){
1432 		w = chartorune(&r, e);
1433 		if(r==' ' || r=='\t'){
1434 			inarg = FALSE;
1435 			*e = 0;
1436 			continue;
1437 		}
1438 		if(!inarg){
1439 			inarg = TRUE;
1440 			av = realloc(av, (ac+1)*sizeof(char**));
1441 			av[ac++] = e;
1442 		}
1443 	}
1444 	av = realloc(av, (ac+2)*sizeof(char**));
1445 	av[ac++] = arg;
1446 	av[ac] = nil;
1447 	c->av = av;
1448 
1449 	/*
1450 	 * clumsy -- we're not running in a separate thread
1451 	 * so we have to save the current directory and put
1452 	 * it back when we're done.  if this gets to be a regular
1453 	 * thing we could change threadexec to take a directory too.
1454 	 */
1455 	olddir = -1;
1456 	if(rdir != nil){
1457 		olddir = open(".", OREAD);
1458 		dir = runetobyte(rdir, ndir);
1459 		chdir(dir);	/* ignore error: probably app. window */
1460 		free(dir);
1461 	}
1462 	ret = threadspawn(sfd, av[0], av);
1463 	if(olddir >= 0){
1464 		fchdir(olddir);
1465 		close(olddir);
1466 	}
1467 	if(ret >= 0){
1468 		if(cpid)
1469 			sendul(cpid, ret);
1470 		threadexits("");
1471 	}
1472 /* libthread uses execvp so no need to do this */
1473 #if 0
1474 	e = av[0];
1475 	if(e[0]=='/' || (e[0]=='.' && e[1]=='/'))
1476 		goto Fail;
1477 	if(cputype){
1478 		sprint(buf, "%s/%s", cputype, av[0]);
1479 		procexec(cpid, sfd, buf, av);
1480 	}
1481 	sprint(buf, "/bin/%s", av[0]);
1482 	procexec(cpid, sfd, buf, av);
1483 #endif
1484 	goto Fail;
1485 
1486 Hard:
1487 	/*
1488 	 * ugly: set path = (. $cputype /bin)
1489 	 * should honor $path if unusual.
1490 	 */
1491 	if(cputype){
1492 		n = 0;
1493 		memmove(buf+n, ".", 2);
1494 		n += 2;
1495 		i = strlen(cputype)+1;
1496 		memmove(buf+n, cputype, i);
1497 		n += i;
1498 		memmove(buf+n, "/bin", 5);
1499 		n += 5;
1500 		fd = create("/env/path", OWRITE, 0666);
1501 		write(fd, buf, n);
1502 		close(fd);
1503 	}
1504 
1505 	if(arg){
1506 		news = emalloc(strlen(t) + 1 + 1 + strlen(arg) + 1 + 1);
1507 		if(news){
1508 			sprint(news, "%s '%s'", t, arg);	/* BUG: what if quote in arg? */
1509 			free(s);
1510 			t = news;
1511 			c->text = news;
1512 		}
1513 	}
1514 	olddir = -1;
1515 	if(rdir != nil){
1516 		olddir = open(".", OREAD);
1517 		dir = runetobyte(rdir, ndir);
1518 		chdir(dir);	/* ignore error: probably app. window */
1519 		free(dir);
1520 	}
1521 	rcarg[0] = "rc";
1522 	rcarg[1] = "-c";
1523 	rcarg[2] = t;
1524 	rcarg[3] = nil;
1525 	ret = threadspawn(sfd, rcarg[0], rcarg);
1526 	if(olddir >= 0){
1527 		fchdir(olddir);
1528 		close(olddir);
1529 	}
1530 	if(ret >= 0){
1531 		if(cpid)
1532 			sendul(cpid, ret);
1533 		threadexits(nil);
1534 	}
1535 	warning(nil, "exec rc: %r\n");
1536 
1537    Fail:
1538 	/* threadexec hasn't happened, so send a zero */
1539 	close(sfd[0]);
1540 	close(sfd[1]);
1541 	if(sfd[2] != sfd[1])
1542 		close(sfd[2]);
1543 	sendul(cpid, 0);
1544 	threadexits(nil);
1545 }
1546 
1547 void
1548 runwaittask(void *v)
1549 {
1550 	Command *c;
1551 	Channel *cpid;
1552 	void **a;
1553 
1554 	threadsetname("runwaittask");
1555 	a = v;
1556 	c = a[0];
1557 	cpid = a[1];
1558 	free(a);
1559 	do
1560 		c->pid = recvul(cpid);
1561 	while(c->pid == ~0);
1562 	free(c->av);
1563 	if(c->pid != 0)	/* successful exec */
1564 		sendp(ccommand, c);
1565 	else{
1566 		if(c->iseditcmd)
1567 			sendul(cedit, 0);
1568 		free(c->name);
1569 		free(c->text);
1570 		free(c);
1571 	}
1572 	chanfree(cpid);
1573 }
1574 
1575 void
1576 run(Window *win, char *s, Rune *rdir, int ndir, int newns, char *argaddr, char *xarg, int iseditcmd)
1577 {
1578 	void **arg;
1579 	Command *c;
1580 	Channel *cpid;
1581 
1582 	if(s == nil)
1583 		return;
1584 
1585 	arg = emalloc(10*sizeof(void*));
1586 	c = emalloc(sizeof *c);
1587 	cpid = chancreate(sizeof(ulong), 0);
1588 	arg[0] = win;
1589 	arg[1] = s;
1590 	arg[2] = rdir;
1591 	arg[3] = (void*)ndir;
1592 	arg[4] = (void*)newns;
1593 	arg[5] = argaddr;
1594 	arg[6] = xarg;
1595 	arg[7] = c;
1596 	arg[8] = cpid;
1597 	arg[9] = (void*)iseditcmd;
1598 	threadcreate(runproc, arg, STACK);
1599 	/* mustn't block here because must be ready to answer mount() call in run() */
1600 	arg = emalloc(2*sizeof(void*));
1601 	arg[0] = c;
1602 	arg[1] = cpid;
1603 	threadcreate(runwaittask, arg, STACK);
1604 }