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Date:: Tue Jan 4 21:28:37 2005 UTC
Message:: don't need to rename Fid anymore
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 #include <9pclient.h>
12 #include "dat.h"
13 #include "fns.h"
14 
15 Buffer	snarfbuf;
16 
17 void	del(Text*, Text*, Text*, int, int, Rune*, int);
18 void	delcol(Text*, Text*, Text*, int, int, Rune*, int);
19 void	dotfiles(Text*, Text*, Text*, int, int, Rune*, int);
20 void	dump(Text*, Text*, Text*, int, int, Rune*, int);
21 void	edit(Text*, Text*, Text*, int, int, Rune*, int);
22 void	xexit(Text*, Text*, Text*, int, int, Rune*, int);
23 void	fontx(Text*, Text*, Text*, int, int, Rune*, int);
24 void	get(Text*, Text*, Text*, int, int, Rune*, int);
25 void	id(Text*, Text*, Text*, int, int, Rune*, int);
26 void	incl(Text*, Text*, Text*, int, int, Rune*, int);
27 void	indent(Text*, Text*, Text*, int, int, Rune*, int);
28 void	xkill(Text*, Text*, Text*, int, int, Rune*, int);
29 void	local(Text*, Text*, Text*, int, int, Rune*, int);
30 void	look(Text*, Text*, Text*, int, int, Rune*, int);
31 void	newcol(Text*, Text*, Text*, int, int, Rune*, int);
32 void	paste(Text*, Text*, Text*, int, int, Rune*, int);
33 void	put(Text*, Text*, Text*, int, int, Rune*, int);
34 void	putall(Text*, Text*, Text*, int, int, Rune*, int);
35 void	sendx(Text*, Text*, Text*, int, int, Rune*, int);
36 void	sort(Text*, Text*, Text*, int, int, Rune*, int);
37 void	tab(Text*, Text*, Text*, int, int, Rune*, int);
38 void	zeroxx(Text*, Text*, Text*, int, int, Rune*, int);
39 
40 typedef struct Exectab Exectab;
41 struct Exectab
42 {
43 	Rune	*name;
44 	void	(*fn)(Text*, Text*, Text*, int, int, Rune*, int);
45 	int		mark;
46 	int		flag1;
47 	int		flag2;
48 };
49 
50 static Rune LCut[] = { 'C', 'u', 't', 0 };
51 static Rune LDel[] = { 'D', 'e', 'l', 0 };
52 static Rune LDelcol[] = { 'D', 'e', 'l', 'c', 'o', 'l', 0 };
53 static Rune LDelete[] = { 'D', 'e', 'l', 'e', 't', 'e', 0 };
54 static Rune LDump[] = { 'D', 'u', 'm', 'p', 0 };
55 static Rune LEdit[] = { 'E', 'd', 'i', 't', 0 };
56 static Rune LExit[] = { 'E', 'x', 'i', 't', 0 };
57 static Rune LFont[] = { 'F', 'o', 'n', 't', 0 };
58 static Rune LGet[] = { 'G', 'e', 't', 0 };
59 static Rune LID[] = { 'I', 'D', 0 };
60 static Rune LIncl[] = { 'I', 'n', 'c', 'l', 0 };
61 static Rune LIndent[] = { 'I', 'n', 'd', 'e', 'n', 't', 0 };
62 static Rune LKill[] = { 'K', 'i', 'l', 'l', 0 };
63 static Rune LLoad[] = { 'L', 'o', 'a', 'd', 0 };
64 static Rune LLocal[] = { 'L', 'o', 'c', 'a', 'l', 0 };
65 static Rune LLook[] = { 'L', 'o', 'o', 'k', 0 };
66 static Rune LNew[] = { 'N', 'e', 'w', 0 };
67 static Rune LNewcol[] = { 'N', 'e', 'w', 'c', 'o', 'l', 0 };
68 static Rune LPaste[] = { 'P', 'a', 's', 't', 'e', 0 };
69 static Rune LPut[] = { 'P', 'u', 't', 0 };
70 static Rune LPutall[] = { 'P', 'u', 't', 'a', 'l', 'l', 0 };
71 static Rune LRedo[] = { 'R', 'e', 'd', 'o', 0 };
72 static Rune LSend[] = { 'S', 'e', 'n', 'd', 0 };
73 static Rune LSnarf[] = { 'S', 'n', 'a', 'r', 'f', 0 };
74 static Rune LSort[] = { 'S', 'o', 'r', 't', 0 };
75 static Rune LTab[] = { 'T', 'a', 'b', 0 };
76 static Rune LUndo[] = { 'U', 'n', 'd', 'o', 0 };
77 static Rune LZerox[] = { 'Z', 'e', 'r', 'o', 'x', 0 };
78 
79 Exectab exectab[] = {
80 	{ LCut,		cut,		TRUE,	TRUE,	TRUE	},
81 	{ LDel,		del,		FALSE,	FALSE,	XXX		},
82 	{ LDelcol,	delcol,	FALSE,	XXX,		XXX		},
83 	{ LDelete,	del,		FALSE,	TRUE,	XXX		},
84 	{ LDump,	dump,	FALSE,	TRUE,	XXX		},
85 	{ LEdit,		edit,		FALSE,	XXX,		XXX		},
86 	{ LExit,		xexit,		FALSE,	XXX,		XXX		},
87 	{ LFont,		fontx,	FALSE,	XXX,		XXX		},
88 	{ LGet,		get,		FALSE,	TRUE,	XXX		},
89 	{ LID,		id,		FALSE,	XXX,		XXX		},
90 	{ LIncl,		incl,		FALSE,	XXX,		XXX		},
91 	{ LIndent,		indent,	FALSE,	XXX,		XXX		},
92 	{ LKill,		xkill,		FALSE,	XXX,		XXX		},
93 	{ LLoad,		dump,	FALSE,	FALSE,	XXX		},
94 	{ LLocal,		local,	FALSE,	XXX,		XXX		},
95 	{ LLook,		look,		FALSE,	XXX,		XXX		},
96 	{ LNew,		new,		FALSE,	XXX,		XXX		},
97 	{ LNewcol,	newcol,	FALSE,	XXX,		XXX		},
98 	{ LPaste,		paste,	TRUE,	TRUE,	XXX		},
99 	{ LPut,		put,		FALSE,	XXX,		XXX		},
100 	{ LPutall,		putall,	FALSE,	XXX,		XXX		},
101 	{ LRedo,		undo,	FALSE,	FALSE,	XXX		},
102 	{ LSend,		sendx,	TRUE,	XXX,		XXX		},
103 	{ LSnarf,		cut,		FALSE,	TRUE,	FALSE	},
104 	{ LSort,		sort,		FALSE,	XXX,		XXX		},
105 	{ LTab,		tab,		FALSE,	XXX,		XXX		},
106 	{ LUndo,		undo,	FALSE,	TRUE,	XXX		},
107 	{ LZerox,	zeroxx,	FALSE,	XXX,		XXX		},
108 	{ nil, 			0,		0,		0,		0		},
109 };
110 
111 Exectab*
112 lookup(Rune *r, int n)
113 {
114 	Exectab *e;
115 	int nr;
116 
117 	r = skipbl(r, n, &n);
118 	if(n == 0)
119 		return nil;
120 	findbl(r, n, &nr);
121 	nr = n-nr;
122 	for(e=exectab; e->name; e++)
123 		if(runeeq(r, nr, e->name, runestrlen(e->name)) == TRUE)
124 			return e;
125 	return nil;
126 }
127 
128 int
129 isexecc(int c)
130 {
131 	if(isfilec(c))
132 		return 1;
133 	return c=='<' || c=='|' || c=='>';
134 }
135 
136 void
137 execute(Text *t, uint aq0, uint aq1, int external, Text *argt)
138 {
139 	uint q0, q1;
140 	Rune *r, *s;
141 	char *b, *a, *aa;
142 	Exectab *e;
143 	int c, n, f;
144 	Runestr dir;
145 
146 	q0 = aq0;
147 	q1 = aq1;
148 	if(q1 == q0){	/* expand to find word (actually file name) */
149 		/* if in selection, choose selection */
150 		if(t->q1>t->q0 && t->q0<=q0 && q0<=t->q1){
151 			q0 = t->q0;
152 			q1 = t->q1;
153 		}else{
154 			while(q1<t->file->b.nc && isexecc(c=textreadc(t, q1)) && c!=':')
155 				q1++;
156 			while(q0>0 && isexecc(c=textreadc(t, q0-1)) && c!=':')
157 				q0--;
158 			if(q1 == q0)
159 				return;
160 		}
161 	}
162 	r = runemalloc(q1-q0);
163 	bufread(&t->file->b, q0, r, q1-q0);
164 	e = lookup(r, q1-q0);
165 	if(!external && t->w!=nil && t->w->nopen[QWevent]>0){
166 		f = 0;
167 		if(e)
168 			f |= 1;
169 		if(q0!=aq0 || q1!=aq1){
170 			bufread(&t->file->b, aq0, r, aq1-aq0);
171 			f |= 2;
172 		}
173 		aa = getbytearg(argt, TRUE, TRUE, &a);
174 		if(a){	
175 			if(strlen(a) > EVENTSIZE){	/* too big; too bad */
176 				free(aa);
177 				free(a);
178 				warning(nil, "`argument string too long\n");
179 				return;
180 			}
181 			f |= 8;
182 		}
183 		c = 'x';
184 		if(t->what == Body)
185 			c = 'X';
186 		n = aq1-aq0;
187 		if(n <= EVENTSIZE)
188 			winevent(t->w, "%c%d %d %d %d %.*S\n", c, aq0, aq1, f, n, n, r);
189 		else
190 			winevent(t->w, "%c%d %d %d 0 \n", c, aq0, aq1, f, n);
191 		if(q0!=aq0 || q1!=aq1){
192 			n = q1-q0;
193 			bufread(&t->file->b, q0, r, n);
194 			if(n <= EVENTSIZE)
195 				winevent(t->w, "%c%d %d 0 %d %.*S\n", c, q0, q1, n, n, r);
196 			else
197 				winevent(t->w, "%c%d %d 0 0 \n", c, q0, q1, n);
198 		}
199 		if(a){
200 			winevent(t->w, "%c0 0 0 %d %s\n", c, utflen(a), a);
201 			if(aa)
202 				winevent(t->w, "%c0 0 0 %d %s\n", c, utflen(aa), aa);
203 			else
204 				winevent(t->w, "%c0 0 0 0 \n", c);
205 		}
206 		free(r);
207 		free(aa);
208 		free(a);
209 		return;
210 	}
211 	if(e){
212 		if(e->mark && seltext!=nil)
213 		if(seltext->what == Body){
214 			seq++;
215 			filemark(seltext->w->body.file);
216 		}
217 		s = skipbl(r, q1-q0, &n);
218 		s = findbl(s, n, &n);
219 		s = skipbl(s, n, &n);
220 		(*e->fn)(t, seltext, argt, e->flag1, e->flag2, s, n);
221 		free(r);
222 		return;
223 	}
224 
225 	b = runetobyte(r, q1-q0);
226 	free(r);
227 	dir = dirname(t, nil, 0);
228 	if(dir.nr==1 && dir.r[0]=='.'){	/* sigh */
229 		free(dir.r);
230 		dir.r = nil;
231 		dir.nr = 0;
232 	}
233 	aa = getbytearg(argt, TRUE, TRUE, &a);
234 	if(t->w)
235 		incref(&t->w->ref);
236 	run(t->w, b, dir.r, dir.nr, TRUE, aa, a, FALSE);
237 }
238 
239 char*
240 printarg(Text *argt, uint q0, uint q1)
241 {
242 	char *buf;
243 
244 	if(argt->what!=Body || argt->file->name==nil)
245 		return nil;
246 	buf = emalloc(argt->file->nname+32);
247 	if(q0 == q1)
248 		sprint(buf, "%.*S:#%d", argt->file->nname, argt->file->name, q0);
249 	else
250 		sprint(buf, "%.*S:#%d,#%d", argt->file->nname, argt->file->name, q0, q1);
251 	return buf;
252 }
253 
254 char*
255 getarg(Text *argt, int doaddr, int dofile, Rune **rp, int *nrp)
256 {
257 	int n;
258 	Expand e;
259 	char *a;
260 
261 	*rp = nil;
262 	*nrp = 0;
263 	if(argt == nil)
264 		return nil;
265 	a = nil;
266 	textcommit(argt, TRUE);
267 	if(expand(argt, argt->q0, argt->q1, &e)){
268 		free(e.bname);
269 		if(e.nname && dofile){
270 			e.name = runerealloc(e.name, e.nname+1);
271 			if(doaddr)
272 				a = printarg(argt, e.q0, e.q1);
273 			*rp = e.name;
274 			*nrp = e.nname;
275 			return a;
276 		}
277 		free(e.name);
278 	}else{
279 		e.q0 = argt->q0;
280 		e.q1 = argt->q1;
281 	}
282 	n = e.q1 - e.q0;
283 	*rp = runemalloc(n+1);
284 	bufread(&argt->file->b, e.q0, *rp, n);
285 	if(doaddr)
286 		a = printarg(argt, e.q0, e.q1);
287 	*nrp = n;
288 	return a;
289 }
290 
291 char*
292 getbytearg(Text *argt, int doaddr, int dofile, char **bp)
293 {
294 	Rune *r;
295 	int n;
296 	char *aa;
297 
298 	*bp = nil;
299 	aa = getarg(argt, doaddr, dofile, &r, &n);
300 	if(r == nil)
301 		return nil;
302 	*bp = runetobyte(r, n);
303 	free(r);
304 	return aa;
305 }
306 
307 void
308 newcol(Text *et, Text *_0, Text *_1, int _2, int _3, Rune *_4, int _5)
309 {
310 	Column *c;
311 
312 	USED(_0);
313 	USED(_1);
314 	USED(_2);
315 	USED(_3);
316 	USED(_4);
317 	USED(_5);
318 
319 	c = rowadd(et->row, nil, -1);
320 	if(c)
321 		winsettag(coladd(c, nil, nil, -1));
322 }
323 
324 void
325 delcol(Text *et, Text *_0, Text *_1, int _2, int _3, Rune *_4, int _5)
326 {
327 	int i;
328 	Column *c;
329 	Window *w;
330 
331 	USED(_0);
332 	USED(_1);
333 	USED(_2);
334 	USED(_3);
335 	USED(_4);
336 	USED(_5);
337 
338 	c = et->col;
339 	if(c==nil || colclean(c)==0)
340 		return;
341 	for(i=0; i<c->nw; i++){
342 		w = c->w[i];
343 		if(w->nopen[QWevent]+w->nopen[QWaddr]+w->nopen[QWdata]+w->nopen[QWxdata] > 0){
344 			warning(nil, "can't delete column; %.*S is running an external command\n", w->body.file->nname, w->body.file->name);
345 			return;
346 		}
347 	}
348 	rowclose(et->col->row, et->col, TRUE);
349 }
350 
351 void
352 del(Text *et, Text *_0, Text *_1, int flag1, int _2, Rune *_3, int _4)
353 {
354 	USED(_0);
355 	USED(_1);
356 	USED(_2);
357 	USED(_3);
358 	USED(_4);
359 
360 	if(et->col==nil || et->w == nil)
361 		return;
362 	if(flag1 || et->w->body.file->ntext>1 || winclean(et->w, FALSE))
363 		colclose(et->col, et->w, TRUE);
364 }
365 
366 void
367 sort(Text *et, Text *_0, Text *_1, int _2, int _3, Rune *_4, int _5)
368 {
369 	USED(_0);
370 	USED(_1);
371 	USED(_2);
372 	USED(_3);
373 	USED(_4);
374 	USED(_5);
375 
376 	if(et->col)
377 		colsort(et->col);
378 }
379 
380 uint
381 seqof(Window *w, int isundo)
382 {
383 	/* if it's undo, see who changed with us */
384 	if(isundo)
385 		return w->body.file->seq;
386 	/* if it's redo, see who we'll be sync'ed up with */
387 	return fileredoseq(w->body.file);
388 }
389 
390 void
391 undo(Text *et, Text *_0, Text *_1, int flag1, int _2, Rune *_3, int _4)
392 {
393 	int i, j;
394 	Column *c;
395 	Window *w;
396 	uint seq;
397 
398 	USED(_0);
399 	USED(_1);
400 	USED(_2);
401 	USED(_3);
402 	USED(_4);
403 
404 	if(et==nil || et->w== nil)
405 		return;
406 	seq = seqof(et->w, flag1);
407 	if(seq == 0){
408 		/* nothing to undo */
409 		return;
410 	}
411 	/*
412 	 * Undo the executing window first. Its display will update. other windows
413 	 * in the same file will not call show() and jump to a different location in the file.
414 	 * Simultaneous changes to other files will be chaotic, however.
415 	 */
416 	winundo(et->w, flag1);
417 	for(i=0; i<row.ncol; i++){
418 		c = row.col[i];
419 		for(j=0; j<c->nw; j++){
420 			w = c->w[j];
421 			if(w == et->w)
422 				continue;
423 			if(seqof(w, flag1) == seq)
424 				winundo(w, flag1);
425 		}
426 	}
427 }
428 
429 char*
430 getname(Text *t, Text *argt, Rune *arg, int narg, int isput)
431 {
432 	char *s;
433 	Rune *r;
434 	int i, n, promote;
435 	Runestr dir;
436 
437 	getarg(argt, FALSE, TRUE, &r, &n);
438 	promote = FALSE;
439 	if(r == nil)
440 		promote = TRUE;
441 	else if(isput){
442 		/* if are doing a Put, want to synthesize name even for non-existent file */
443 		/* best guess is that file name doesn't contain a slash */
444 		promote = TRUE;
445 		for(i=0; i<n; i++)
446 			if(r[i] == '/'){
447 				promote = FALSE;
448 				break;
449 			}
450 		if(promote){
451 			t = argt;
452 			arg = r;
453 			narg = n;
454 		}
455 	}
456 	if(promote){
457 		n = narg;
458 		if(n <= 0){
459 			s = runetobyte(t->file->name, t->file->nname);
460 			return s;
461 		}
462 		/* prefix with directory name if necessary */
463 		dir.r = nil;
464 		dir.nr = 0;
465 		if(n>0 && arg[0]!='/'){
466 			dir = dirname(t, nil, 0);
467 			if(dir.nr==1 && dir.r[0]=='.'){	/* sigh */
468 				free(dir.r);
469 				dir.r = nil;
470 				dir.nr = 0;
471 			}
472 		}
473 		if(dir.r){
474 			r = runemalloc(dir.nr+n+1);
475 			runemove(r, dir.r, dir.nr);
476 			free(dir.r);
477 			if(dir.nr>0 && r[dir.nr]!='/' && n>0 && arg[0]!='/')
478 				r[dir.nr++] = '/';
479 			runemove(r+dir.nr, arg, n);
480 			n += dir.nr;
481 		}else{
482 			r = runemalloc(n+1);
483 			runemove(r, arg, n);
484 		}
485 	}
486 	s = runetobyte(r, n);
487 	free(r);
488 	if(strlen(s) == 0){
489 		free(s);
490 		s = nil;
491 	}
492 	return s;
493 }
494 
495 void
496 zeroxx(Text *et, Text *t, Text *_1, int _2, int _3, Rune *_4, int _5)
497 {
498 	Window *nw;
499 	int c, locked;
500 
501 	USED(_1);
502 	USED(_2);
503 	USED(_3);
504 	USED(_4);
505 	USED(_5);
506 
507 	locked = FALSE;
508 	if(t!=nil && t->w!=nil && t->w!=et->w){
509 		locked = TRUE;
510 		c = 'M';
511 		if(et->w)
512 			c = et->w->owner;
513 		winlock(t->w, c);
514 	}
515 	if(t == nil)
516 		t = et;
517 	if(t==nil || t->w==nil)
518 		return;
519 	t = &t->w->body;
520 	if(t->w->isdir)
521 		warning(nil, "%.*S is a directory; Zerox illegal\n", t->file->nname, t->file->name);
522 	else{
523 		nw = coladd(t->w->col, nil, t->w, -1);
524 		/* ugly: fix locks so w->unlock works */
525 		winlock1(nw, t->w->owner);
526 	}
527 	if(locked)
528 		winunlock(t->w);
529 }
530 
531 void
532 get(Text *et, Text *t, Text *argt, int flag1, int _0, Rune *arg, int narg)
533 {
534 	char *name;
535 	Rune *r;
536 	int i, n, dirty, samename, isdir;
537 	Window *w;
538 	Text *u;
539 	Dir *d;
540 
541 	USED(_0);
542 
543 	if(flag1)
544 		if(et==nil || et->w==nil)
545 			return;
546 	if(!et->w->isdir && (et->w->body.file->b.nc>0 && !winclean(et->w, TRUE)))
547 		return;
548 	w = et->w;
549 	t = &w->body;
550 	name = getname(t, argt, arg, narg, FALSE);
551 	if(name == nil){
552 		warning(nil, "no file name\n");
553 		return;
554 	}
555 	if(t->file->ntext>1){
556 		d = dirstat(name);
557 		isdir = (d!=nil && (d->qid.type & QTDIR));
558 		free(d);
559 		if(isdir){
560 			warning(nil, "%s is a directory; can't read with multiple windows on it\n", name);
561 			return;
562 		}
563 	}
564 	r = bytetorune(name, &n);
565 	for(i=0; i<t->file->ntext; i++){
566 		u = t->file->text[i];
567 		/* second and subsequent calls with zero an already empty buffer, but OK */
568 		textreset(u);
569 		windirfree(u->w);
570 	}
571 	samename = runeeq(r, n, t->file->name, t->file->nname);
572 	textload(t, 0, name, samename);
573 	if(samename){
574 		t->file->mod = FALSE;
575 		dirty = FALSE;
576 	}else{
577 		t->file->mod = TRUE;
578 		dirty = TRUE;
579 	}
580 	for(i=0; i<t->file->ntext; i++)
581 		t->file->text[i]->w->dirty = dirty;
582 	free(name);
583 	free(r);
584 	winsettag(w);
585 	t->file->unread = FALSE;
586 	for(i=0; i<t->file->ntext; i++){
587 		u = t->file->text[i];
588 		textsetselect(&u->w->tag, u->w->tag.file->b.nc, u->w->tag.file->b.nc);
589 		textscrdraw(u);
590 	}
591 }
592 
593 void
594 putfile(File *f, int q0, int q1, Rune *namer, int nname)
595 {
596 	uint n, m;
597 	Rune *r;
598 	char *s, *name;
599 	int i, fd, q;
600 	Dir *d, *d1;
601 	Window *w;
602 	int isapp;
603 
604 	w = f->curtext->w;
605 	name = runetobyte(namer, nname);
606 	d = dirstat(name);
607 	if(d!=nil && runeeq(namer, nname, f->name, f->nname)){
608 		/* f->mtime+1 because when talking over NFS it's often off by a second */
609 		if(f->dev!=d->dev || f->qidpath!=d->qid.path || f->mtime+1<d->mtime){
610 			f->dev = d->dev;
611 			f->qidpath = d->qid.path;
612 			f->mtime = d->mtime;
613 			if(f->unread)
614 				warning(nil, "%s not written; file already exists\n", name);
615 			else
616 				warning(nil, "%s modified%s%s since last read\n", name, d->muid[0]?" by ":"", d->muid);
617 			goto Rescue1;
618 		}
619 	}
620 	fd = create(name, OWRITE, 0666);
621 	if(fd < 0){
622 		warning(nil, "can't create file %s: %r\n", name);
623 		goto Rescue1;
624 	}
625 	r = fbufalloc();
626 	s = fbufalloc();
627 	free(d);
628 	d = dirfstat(fd);
629 	isapp = (d!=nil && d->length>0 && (d->qid.type&QTAPPEND));
630 	if(isapp){
631 		warning(nil, "%s not written; file is append only\n", name);
632 		goto Rescue2;
633 	}
634 
635 	for(q=q0; q<q1; q+=n){
636 		n = q1 - q;
637 		if(n > BUFSIZE/UTFmax)
638 			n = BUFSIZE/UTFmax;
639 		bufread(&f->b, q, r, n);
640 		m = snprint(s, BUFSIZE+1, "%.*S", n, r);
641 		if(write(fd, s, m) != m){
642 			warning(nil, "can't write file %s: %r\n", name);
643 			goto Rescue2;
644 		}
645 	}
646 	if(runeeq(namer, nname, f->name, f->nname)){
647 		if(q0!=0 || q1!=f->b.nc){
648 			f->mod = TRUE;
649 			w->dirty = TRUE;
650 			f->unread = TRUE;
651 		}else{
652 			d1 = dirfstat(fd);
653 			if(d1 != nil){
654 				free(d);
655 				d = d1;
656 			}
657 			f->qidpath = d->qid.path;
658 			f->dev = d->dev;
659 			f->mtime = d->mtime;
660 			f->mod = FALSE;
661 			w->dirty = FALSE;
662 			f->unread = FALSE;
663 		}
664 		for(i=0; i<f->ntext; i++){
665 			f->text[i]->w->putseq = f->seq;
666 			f->text[i]->w->dirty = w->dirty;
667 		}
668 	}
669 	fbuffree(s);
670 	fbuffree(r);
671 	free(d);
672 	free(namer);
673 	free(name);
674 	close(fd);
675 	winsettag(w);
676 	return;
677 
678     Rescue2:
679 	fbuffree(s);
680 	fbuffree(r);
681 	close(fd);
682 	/* fall through */
683 
684     Rescue1:
685 	free(d);
686 	free(namer);
687 	free(name);
688 }
689 
690 void
691 put(Text *et, Text *_0, Text *argt, int _1, int _2, Rune *arg, int narg)
692 {
693 	int nname;
694 	Rune  *namer;
695 	Window *w;
696 	File *f;
697 	char *name;
698 
699 	USED(_0);
700 	USED(_1);
701 	USED(_2);
702 
703 	if(et==nil || et->w==nil || et->w->isdir)
704 		return;
705 	w = et->w;
706 	f = w->body.file;
707 	name = getname(&w->body, argt, arg, narg, TRUE);
708 	if(name == nil){
709 		warning(nil, "no file name\n");
710 		return;
711 	}
712 	namer = bytetorune(name, &nname);
713 	putfile(f, 0, f->b.nc, namer, nname);
714 	free(name);
715 }
716 
717 void
718 dump(Text *_0, Text *_1, Text *argt, int isdump, int _2, Rune *arg, int narg)
719 {
720 	char *name;
721 
722 	USED(_0);
723 	USED(_1);
724 	USED(_2);
725 
726 	if(narg)
727 		name = runetobyte(arg, narg);
728 	else
729 		getbytearg(argt, FALSE, TRUE, &name);
730 	if(isdump)
731 		rowdump(&row, name);
732 	else
733 		rowload(&row, name, FALSE);
734 	free(name);
735 }
736 
737 void
738 cut(Text *et, Text *t, Text *_0, int dosnarf, int docut, Rune *_2, int _3)
739 {
740 	uint q0, q1, n, locked, c;
741 	Rune *r;
742 
743 	USED(_0);
744 	USED(_2);
745 	USED(_3);
746 
747 	/* use current window if snarfing and its selection is non-null */
748 	if(et!=t && dosnarf && et->w!=nil){
749 		if(et->w->body.q1>et->w->body.q0){
750 			t = &et->w->body;
751 			if(docut)
752 				filemark(t->file);	/* seq has been incremented by execute */
753 		}else if(et->w->tag.q1>et->w->tag.q0)
754 			t = &et->w->tag;
755 	}
756 	if(t == nil){
757 		/* can only happen if seltext == nil */
758 		return;
759 	}
760 	locked = FALSE;
761 	if(t->w!=nil && et->w!=t->w){
762 		locked = TRUE;
763 		c = 'M';
764 		if(et->w)
765 			c = et->w->owner;
766 		winlock(t->w, c);
767 	}
768 	if(t->q0 == t->q1){
769 		if(locked)
770 			winunlock(t->w);
771 		return;
772 	}
773 	if(dosnarf){
774 		q0 = t->q0;
775 		q1 = t->q1;
776 		bufdelete(&snarfbuf, 0, snarfbuf.nc);
777 		r = fbufalloc();
778 		while(q0 < q1){
779 			n = q1 - q0;
780 			if(n > RBUFSIZE)
781 				n = RBUFSIZE;
782 			bufread(&t->file->b, q0, r, n);
783 			bufinsert(&snarfbuf, snarfbuf.nc, r, n);
784 			q0 += n;
785 		}
786 		fbuffree(r);
787 		acmeputsnarf();
788 	}
789 	if(docut){
790 		textdelete(t, t->q0, t->q1, TRUE);
791 		textsetselect(t, t->q0, t->q0);
792 		if(t->w){
793 			textscrdraw(t);
794 			winsettag(t->w);
795 		}
796 	}else if(dosnarf)	/* Snarf command */
797 		argtext = t;
798 	if(locked)
799 		winunlock(t->w);
800 }
801 
802 void
803 paste(Text *et, Text *t, Text *_0, int selectall, int tobody, Rune *_1, int _2)
804 {
805 	int c;
806 	uint q, q0, q1, n;
807 	Rune *r;
808 
809 	USED(_0);
810 	USED(_1);
811 	USED(_2);
812 
813 	/* if(tobody), use body of executing window  (Paste or Send command) */
814 	if(tobody && et!=nil && et->w!=nil){
815 		t = &et->w->body;
816 		filemark(t->file);	/* seq has been incremented by execute */
817 	}
818 	if(t == nil)
819 		return;
820 
821 	acmegetsnarf();
822 	if(t==nil || snarfbuf.nc==0)
823 		return;
824 	if(t->w!=nil && et->w!=t->w){
825 		c = 'M';
826 		if(et->w)
827 			c = et->w->owner;
828 		winlock(t->w, c);
829 	}
830 	cut(t, t, nil, FALSE, TRUE, nil, 0);
831 	q = 0;
832 	q0 = t->q0;
833 	q1 = t->q0+snarfbuf.nc;
834 	r = fbufalloc();
835 	while(q0 < q1){
836 		n = q1 - q0;
837 		if(n > RBUFSIZE)
838 			n = RBUFSIZE;
839 		if(r == nil)
840 			r = runemalloc(n);
841 		bufread(&snarfbuf, q, r, n);
842 		textinsert(t, q0, r, n, TRUE);
843 		q += n;
844 		q0 += n;
845 	}
846 	fbuffree(r);
847 	if(selectall)
848 		textsetselect(t, t->q0, q1);
849 	else
850 		textsetselect(t, q1, q1);
851 	if(t->w){
852 		textscrdraw(t);
853 		winsettag(t->w);
854 	}
855 	if(t->w!=nil && et->w!=t->w)
856 		winunlock(t->w);
857 }
858 
859 void
860 look(Text *et, Text *t, Text *argt, int _0, int _1, Rune *arg, int narg)
861 {
862 	Rune *r;
863 	int n;
864 
865 	USED(_0);
866 	USED(_1);
867 
868 	if(et && et->w){
869 		t = &et->w->body;
870 		if(narg > 0){
871 			search(t, arg, narg);
872 			return;
873 		}
874 		getarg(argt, FALSE, FALSE, &r, &n);
875 		if(r == nil){
876 			n = t->q1-t->q0;
877 			r = runemalloc(n);
878 			bufread(&t->file->b, t->q0, r, n);
879 		}
880 		search(t, r, n);
881 		free(r);
882 	}
883 }
884 
885 static Rune Lnl[] = { '\n', 0 };
886 
887 void
888 sendx(Text *et, Text *t, Text *_0, int _1, int _2, Rune *_3, int _4)
889 {
890 	USED(_0);
891 	USED(_1);
892 	USED(_2);
893 	USED(_3);
894 	USED(_4);
895 
896 	if(et->w==nil)
897 		return;
898 	t = &et->w->body;
899 	if(t->q0 != t->q1)
900 		cut(t, t, nil, TRUE, FALSE, nil, 0);
901 	textsetselect(t, t->file->b.nc, t->file->b.nc);
902 	paste(t, t, nil, TRUE, TRUE, nil, 0);
903 	if(textreadc(t, t->file->b.nc-1) != '\n'){
904 		textinsert(t, t->file->b.nc, Lnl, 1, TRUE);
905 		textsetselect(t, t->file->b.nc, t->file->b.nc);
906 	}
907 }
908 
909 void
910 edit(Text *et, Text *_0, Text *argt, int _1, int _2, Rune *arg, int narg)
911 {
912 	Rune *r;
913 	int len;
914 
915 	USED(_0);
916 	USED(_1);
917 	USED(_2);
918 
919 	if(et == nil)
920 		return;
921 	getarg(argt, FALSE, TRUE, &r, &len);
922 	seq++;
923 	if(r != nil){
924 		editcmd(et, r, len);
925 		free(r);
926 	}else
927 		editcmd(et, arg, narg);
928 }
929 
930 void
931 xexit(Text *et, Text *_0, Text *_1, int _2, int _3, Rune *_4, int _5)
932 {
933 	USED(et);
934 	USED(_0);
935 	USED(_1);
936 	USED(_2);
937 	USED(_3);
938 	USED(_4);
939 	USED(_5);
940 
941 	if(rowclean(&row)){
942 		sendul(cexit, 0);
943 		threadexits(nil);
944 	}
945 }
946 
947 void
948 putall(Text *et, Text *_0, Text *_1, int _2, int _3, Rune *_4, int _5)
949 {
950 	int i, j, e;
951 	Window *w;
952 	Column *c;
953 	char *a;
954 
955 	USED(et);
956 	USED(_0);
957 	USED(_1);
958 	USED(_2);
959 	USED(_3);
960 	USED(_4);
961 	USED(_5);
962 
963 	for(i=0; i<row.ncol; i++){
964 		c = row.col[i];
965 		for(j=0; j<c->nw; j++){
966 			w = c->w[j];
967 			if(w->isscratch || w->isdir || w->body.file->nname==0)
968 				continue;
969 			if(w->nopen[QWevent] > 0)
970 				continue;
971 			a = runetobyte(w->body.file->name, w->body.file->nname);
972 			e = access(a, 0);
973 			if(w->body.file->mod || w->body.ncache)
974 				if(e < 0)
975 					warning(nil, "no auto-Put of %s: %r\n", a);
976 				else{
977 					wincommit(w, &w->body);
978 					put(&w->body, nil, nil, XXX, XXX, nil, 0);
979 				}
980 			free(a);
981 		}
982 	}
983 }
984 
985 
986 void
987 id(Text *et, Text *_0, Text *_1, int _2, int _3, Rune *_4, int _5)
988 {
989 	USED(et);
990 	USED(_0);
991 	USED(_1);
992 	USED(_2);
993 	USED(_3);
994 	USED(_4);
995 	USED(_5);
996 
997 	if(et && et->w)
998 		warning(nil, "/mnt/acme/%d/\n", et->w->id);
999 }
1000 
1001 void
1002 local(Text *et, Text *_0, Text *argt, int _1, int _2, Rune *arg, int narg)
1003 {
1004 	char *a, *aa;
1005 	Runestr dir;
1006 
1007 	USED(_0);
1008 	USED(_1);
1009 	USED(_2);
1010 
1011 	aa = getbytearg(argt, TRUE, TRUE, &a);
1012 
1013 	dir = dirname(et, nil, 0);
1014 	if(dir.nr==1 && dir.r[0]=='.'){	/* sigh */
1015 		free(dir.r);
1016 		dir.r = nil;
1017 		dir.nr = 0;
1018 	}
1019 	run(nil, runetobyte(arg, narg), dir.r, dir.nr, FALSE, aa, a, FALSE);
1020 }
1021 
1022 void
1023 xkill(Text *_0, Text *_1, Text *argt, int _2, int _3, Rune *arg, int narg)
1024 {
1025 	Rune *a, *cmd, *r;
1026 	int na;
1027 
1028 	USED(_0);
1029 	USED(_1);
1030 	USED(_2);
1031 	USED(_3);
1032 
1033 	getarg(argt, FALSE, FALSE, &r, &na);
1034 	if(r)
1035 		xkill(nil, nil, nil, 0, 0, r, na);
1036 	/* loop condition: *arg is not a blank */
1037 	for(;;){
1038 		a = findbl(arg, narg, &na);
1039 		if(a == arg)
1040 			break;
1041 		cmd = runemalloc(narg-na+1);
1042 		runemove(cmd, arg, narg-na);
1043 		sendp(ckill, cmd);
1044 		arg = skipbl(a, na, &narg);
1045 	}
1046 }
1047 
1048 static Rune Lfix[] = { 'f', 'i', 'x', 0 };
1049 static Rune Lvar[] = { 'v', 'a', 'r', 0 };
1050 
1051 void
1052 fontx(Text *et, Text *t, Text *argt, int _0, int _1, Rune *arg, int narg)
1053 {
1054 	Rune *a, *r, *flag, *file;
1055 	int na, nf;
1056 	char *aa;
1057 	Reffont *newfont;
1058 	Dirlist *dp;
1059 	int i, fix;
1060 
1061 	USED(_0);
1062 	USED(_1);
1063 
1064 	if(et==nil || et->w==nil)
1065 		return;
1066 	t = &et->w->body;
1067 	flag = nil;
1068 	file = nil;
1069 	/* loop condition: *arg is not a blank */
1070 	nf = 0;
1071 	for(;;){
1072 		a = findbl(arg, narg, &na);
1073 		if(a == arg)
1074 			break;
1075 		r = runemalloc(narg-na+1);
1076 		runemove(r, arg, narg-na);
1077 		if(runeeq(r, narg-na, Lfix, 3) || runeeq(r, narg-na, Lvar, 3)){
1078 			free(flag);
1079 			flag = r;
1080 		}else{
1081 			free(file);
1082 			file = r;
1083 			nf = narg-na;
1084 		}
1085 		arg = skipbl(a, na, &narg);
1086 	}
1087 	getarg(argt, FALSE, TRUE, &r, &na);
1088 	if(r)
1089 		if(runeeq(r, na, Lfix, 3) || runeeq(r, na, Lvar, 3)){
1090 			free(flag);
1091 			flag = r;
1092 		}else{
1093 			free(file);
1094 			file = r;
1095 			nf = na;
1096 		}
1097 	fix = 1;
1098 	if(flag)
1099 		fix = runeeq(flag, runestrlen(flag), Lfix, 3);
1100 	else if(file == nil){
1101 		newfont = rfget(FALSE, FALSE, FALSE, nil);
1102 		if(newfont)
1103 			fix = strcmp(newfont->f->name, t->fr.font->name)==0;
1104 	}
1105 	if(file){
1106 		aa = runetobyte(file, nf);
1107 		newfont = rfget(fix, flag!=nil, FALSE, aa);
1108 		free(aa);
1109 	}else
1110 		newfont = rfget(fix, FALSE, FALSE, nil);
1111 	if(newfont){
1112 		draw(screen, t->w->r, textcols[BACK], nil, ZP);
1113 		rfclose(t->reffont);
1114 		t->reffont = newfont;
1115 		t->fr.font = newfont->f;
1116 		frinittick(&t->fr);
1117 		if(t->w->isdir){
1118 			t->all.min.x++;	/* force recolumnation; disgusting! */
1119 			for(i=0; i<t->w->ndl; i++){
1120 				dp = t->w->dlp[i];
1121 				aa = runetobyte(dp->r, dp->nr);
1122 				dp->wid = stringwidth(newfont->f, aa);
1123 				free(aa);
1124 			}
1125 		}
1126 		/* avoid shrinking of window due to quantization */
1127 		colgrow(t->w->col, t->w, -1);
1128 	}
1129 	free(file);
1130 	free(flag);
1131 }
1132 
1133 void
1134 incl(Text *et, Text *_0, Text *argt, int _1, int _2, Rune *arg, int narg)
1135 {
1136 	Rune *a, *r;
1137 	Window *w;
1138 	int na, n, len;
1139 
1140 	USED(_0);
1141 	USED(_1);
1142 	USED(_2);
1143 
1144 	if(et==nil || et->w==nil)
1145 		return;
1146 	w = et->w;
1147 	n = 0;
1148 	getarg(argt, FALSE, TRUE, &r, &len);
1149 	if(r){
1150 		n++;
1151 		winaddincl(w, r, len);
1152 	}
1153 	/* loop condition: *arg is not a blank */
1154 	for(;;){
1155 		a = findbl(arg, narg, &na);
1156 		if(a == arg)
1157 			break;
1158 		r = runemalloc(narg-na+1);
1159 		runemove(r, arg, narg-na);
1160 		n++;
1161 		winaddincl(w, r, narg-na);
1162 		arg = skipbl(a, na, &narg);
1163 	}
1164 	if(n==0 && w->nincl){
1165 		for(n=w->nincl; --n>=0; )
1166 			warning(nil, "%S ", w->incl[n]);
1167 		warning(nil, "\n");
1168 	}
1169 }
1170 
1171 static Rune LON[] = { 'O', 'N', 0 };
1172 static Rune LOFF[] = { 'O', 'F', 'F', 0 };
1173 static Rune Lon[] = { 'o', 'n', 0 };
1174 
1175 enum {
1176 	IGlobal = -2,
1177 	IError = -1,
1178 	Ion = 0,
1179 	Ioff = 1,
1180 };
1181 
1182 static int
1183 indentval(Rune *s, int n)
1184 {
1185 	if(n < 2)
1186 		return IError;
1187 	if(runestrncmp(s, LON, n) == 0){
1188 		globalautoindent = TRUE;
1189 		warning(nil, "Indent ON\n");
1190 		return IGlobal;
1191 	}
1192 	if(runestrncmp(s, LOFF, n) == 0){
1193 		globalautoindent = FALSE;
1194 		warning(nil, "Indent OFF\n");
1195 		return IGlobal;
1196 	}
1197 	return runestrncmp(s, Lon, n) == 0;
1198 }
1199 
1200 void
1201 indent(Text *et, Text *_0, Text *argt, int _1, int _2, Rune *arg, int narg)
1202 {
1203 	Rune *a, *r;
1204 	Window *w;
1205 	int na, len, autoindent;
1206 
1207 	USED(_0);
1208 	USED(_1);
1209 	USED(_2);
1210 
1211 	w = nil;
1212 	if(et!=nil && et->w!=nil)
1213 		w = et->w;
1214 	autoindent = IError;
1215 	getarg(argt, FALSE, TRUE, &r, &len);
1216 	if(r!=nil && len>0)
1217 		autoindent = indentval(r, len);
1218 	else{
1219 		a = findbl(arg, narg, &na);
1220 		if(a != arg)
1221 			autoindent = indentval(arg, narg-na);
1222 	}
1223 	if(w != nil){
1224 		switch(autoindent){
1225 		case Ion:
1226 		case Ioff:
1227 			w->autoindent = autoindent;
1228 			break;
1229 		case IGlobal:
1230 			w->autoindent = globalautoindent;
1231 			break;
1232 		}
1233 	}
1234 }
1235 
1236 void
1237 tab(Text *et, Text *_0, Text *argt, int _1, int _2, Rune *arg, int narg)
1238 {
1239 	Rune *a, *r;
1240 	Window *w;
1241 	int na, len, tab;
1242 	char *p;
1243 
1244 	USED(_0);
1245 	USED(_1);
1246 	USED(_2);
1247 
1248 	if(et==nil || et->w==nil)
1249 		return;
1250 	w = et->w;
1251 	getarg(argt, FALSE, TRUE, &r, &len);
1252 	tab = 0;
1253 	if(r!=nil && len>0){
1254 		p = runetobyte(r, len);
1255 		if('0'<=p[0] && p[0]<='9')
1256 			tab = atoi(p);
1257 		free(p);
1258 	}else{
1259 		a = findbl(arg, narg, &na);
1260 		if(a != arg){
1261 			p = runetobyte(arg, narg-na);
1262 			if('0'<=p[0] && p[0]<='9')
1263 				tab = atoi(p);
1264 			free(p);
1265 		}
1266 	}
1267 	if(tab > 0){
1268 		if(w->body.tabstop != tab){
1269 			w->body.tabstop = tab;
1270 			winresize(w, w->r, 1);
1271 		}
1272 	}else
1273 		warning(nil, "%.*S: Tab %d\n", w->body.file->nname, w->body.file->name, w->body.tabstop);
1274 }
1275 
1276 void
1277 runproc(void *argvp)
1278 {
1279 	/* args: */
1280 		Window *win;
1281 		char *s;
1282 		Rune *rdir;
1283 		int ndir;
1284 		int newns;
1285 		char *argaddr;
1286 		char *arg;
1287 		Command *c;
1288 		Channel *cpid;
1289 		int iseditcmd;
1290 	/* end of args */
1291 	char *e, *t, *name, *filename, *dir, **av, *news;
1292 	Rune r, **incl;
1293 	int ac, w, inarg, i, n, fd, nincl, winid;
1294 	int sfd[3];
1295 	int pipechar;
1296 	char buf[512];
1297 	int olddir;
1298 	int ret;
1299 	//static void *parg[2];
1300 	char *rcarg[4];
1301 	void **argv;
1302 	CFsys *fs;
1303 
1304 	argv = argvp;
1305 	win = argv[0];
1306 	s = argv[1];
1307 	rdir = argv[2];
1308 	ndir = (int)argv[3];
1309 	newns = (int)argv[4];
1310 	argaddr = argv[5];
1311 	arg = argv[6];
1312 	c = argv[7];
1313 	cpid = argv[8];
1314 	iseditcmd = (int)argv[9];
1315 	free(argv);
1316 
1317 	t = s;
1318 	while(*t==' ' || *t=='\n' || *t=='\t')
1319 		t++;
1320 	for(e=t; *e; e++)
1321 		if(*e==' ' || *e=='\n' || *e=='\t' )
1322 			break;
1323 	name = emalloc((e-t)+2);
1324 	memmove(name, t, e-t);
1325 	name[e-t] = 0;
1326 	e = utfrrune(name, '/');
1327 	if(e)
1328 		memmove(name, e+1, strlen(e+1)+1);	/* strcpy but overlaps */
1329 	strcat(name, " ");	/* add blank here for ease in waittask */
1330 	c->name = bytetorune(name, &c->nname);
1331 	free(name);
1332 	pipechar = 0;
1333 	if(*t=='<' || *t=='|' || *t=='>')
1334 		pipechar = *t++;
1335 	c->iseditcmd = iseditcmd;
1336 	c->text = s;
1337 	if(newns){
1338 		nincl = 0;
1339 		incl = nil;
1340 		if(win){
1341 			filename = smprint("%.*S", win->body.file->nname, win->body.file->name);
1342 			nincl = win->nincl;
1343 			if(nincl > 0){
1344 				incl = emalloc(nincl*sizeof(Rune*));
1345 				for(i=0; i<nincl; i++){
1346 					n = runestrlen(win->incl[i]);
1347 					incl[i] = runemalloc(n+1);
1348 					runemove(incl[i], win->incl[i], n);
1349 				}
1350 			}
1351 			winid = win->id;
1352 		}else{
1353 			filename = nil;
1354 			winid = 0;
1355 			if(activewin)
1356 				winid = activewin->id;
1357 		}
1358 		rfork(RFNAMEG|RFENVG|RFFDG|RFNOTEG);
1359 		sprint(buf, "%d", winid);
1360 		putenv("winid", buf);
1361 
1362 		if(filename){
1363 			putenv("%", filename);
1364 			free(filename);
1365 		}
1366 		c->md = fsysmount(rdir, ndir, incl, nincl);
1367 		if(c->md == nil){
1368 			fprint(2, "child: can't allocate mntdir: %r\n");
1369 			threadexits("fsysmount");
1370 		}
1371 		sprint(buf, "%d", c->md->id);
1372 		if((fs = nsmount("acme", buf)) == nil){
1373 			fprint(2, "child: can't mount acme: %r\n");
1374 			fsysdelid(c->md);
1375 			c->md = nil;
1376 			threadexits("nsmount");
1377 		}
1378 		if(winid>0 && (pipechar=='|' || pipechar=='>')){
1379 			sprint(buf, "%d/rdsel", winid);
1380 			sfd[0] = fsopenfd(fs, buf, OREAD);
1381 		}else
1382 			sfd[0] = open("/dev/null", OREAD);
1383 		if((winid>0 || iseditcmd) && (pipechar=='|' || pipechar=='<')){
1384 			if(iseditcmd){
1385 				if(winid > 0)
1386 					sprint(buf, "%d/editout", winid);
1387 				else
1388 					sprint(buf, "editout");
1389 			}else
1390 				sprint(buf, "%d/wrsel", winid);
1391 			sfd[1] = fsopenfd(fs, buf, OWRITE);
1392 			sfd[2] = fsopenfd(fs, "cons", OWRITE);
1393 		}else{
1394 			sfd[1] = fsopenfd(fs, "cons", OWRITE);
1395 			sfd[2] = sfd[1];
1396 		}
1397 		fsunmount(fs);
1398 	}else{
1399 		rfork(RFFDG|RFNOTEG);
1400 		fsysclose();
1401 		sfd[0] = open("/dev/null", OREAD);
1402 		sfd[1] = open("/dev/null", OWRITE);
1403 		sfd[2] = dup(erroutfd, -1);
1404 	}
1405 	if(win)
1406 		winclose(win);
1407 
1408 	if(argaddr)
1409 		putenv("acmeaddr", argaddr);
1410 	if(strlen(t) > sizeof buf-10)	/* may need to print into stack */
1411 		goto Hard;
1412 	inarg = FALSE;
1413 	for(e=t; *e; e+=w){
1414 		w = chartorune(&r, e);
1415 		if(r==' ' || r=='\t')
1416 			continue;
1417 		if(r < ' ')
1418 			goto Hard;
1419 		if(utfrune("#;&|^$=`'{}()<>[]*?^~`", r))
1420 			goto Hard;
1421 		inarg = TRUE;
1422 	}
1423 	if(!inarg)
1424 		goto Fail;
1425 
1426 	ac = 0;
1427 	av = nil;
1428 	inarg = FALSE;
1429 	for(e=t; *e; e+=w){
1430 		w = chartorune(&r, e);
1431 		if(r==' ' || r=='\t'){
1432 			inarg = FALSE;
1433 			*e = 0;
1434 			continue;
1435 		}
1436 		if(!inarg){
1437 			inarg = TRUE;
1438 			av = realloc(av, (ac+1)*sizeof(char**));
1439 			av[ac++] = e;
1440 		}
1441 	}
1442 	av = realloc(av, (ac+2)*sizeof(char**));
1443 	av[ac++] = arg;
1444 	av[ac] = nil;
1445 	c->av = av;
1446 
1447 	/*
1448 	 * clumsy -- we're not running in a separate thread
1449 	 * so we have to save the current directory and put
1450 	 * it back when we're done.  if this gets to be a regular
1451 	 * thing we could change threadexec to take a directory too.
1452 	 */
1453 	olddir = -1;
1454 	if(rdir != nil){
1455 		olddir = open(".", OREAD);
1456 		dir = runetobyte(rdir, ndir);
1457 		chdir(dir);	/* ignore error: probably app. window */
1458 		free(dir);
1459 	}
1460 	ret = threadspawn(sfd, av[0], av);
1461 	if(olddir >= 0){
1462 		fchdir(olddir);
1463 		close(olddir);
1464 	}
1465 	if(ret >= 0){
1466 		if(cpid)
1467 			sendul(cpid, ret);
1468 		threadexits("");
1469 	}
1470 /* libthread uses execvp so no need to do this */
1471 #if 0
1472 	e = av[0];
1473 	if(e[0]=='/' || (e[0]=='.' && e[1]=='/'))
1474 		goto Fail;
1475 	if(cputype){
1476 		sprint(buf, "%s/%s", cputype, av[0]);
1477 		procexec(cpid, sfd, buf, av);
1478 	}
1479 	sprint(buf, "/bin/%s", av[0]);
1480 	procexec(cpid, sfd, buf, av);
1481 #endif
1482 	goto Fail;
1483 
1484 Hard:
1485 	/*
1486 	 * ugly: set path = (. $cputype /bin)
1487 	 * should honor $path if unusual.
1488 	 */
1489 	if(cputype){
1490 		n = 0;
1491 		memmove(buf+n, ".", 2);
1492 		n += 2;
1493 		i = strlen(cputype)+1;
1494 		memmove(buf+n, cputype, i);
1495 		n += i;
1496 		memmove(buf+n, "/bin", 5);
1497 		n += 5;
1498 		fd = create("/env/path", OWRITE, 0666);
1499 		write(fd, buf, n);
1500 		close(fd);
1501 	}
1502 
1503 	if(arg){
1504 		news = emalloc(strlen(t) + 1 + 1 + strlen(arg) + 1 + 1);
1505 		if(news){
1506 			sprint(news, "%s '%s'", t, arg);	/* BUG: what if quote in arg? */
1507 			free(s);
1508 			t = news;
1509 			c->text = news;
1510 		}
1511 	}
1512 	olddir = -1;
1513 	if(rdir != nil){
1514 		olddir = open(".", OREAD);
1515 		dir = runetobyte(rdir, ndir);
1516 		chdir(dir);	/* ignore error: probably app. window */
1517 		free(dir);
1518 	}
1519 	rcarg[0] = "rc";
1520 	rcarg[1] = "-c";
1521 	rcarg[2] = t;
1522 	rcarg[3] = nil;
1523 	ret = threadspawn(sfd, rcarg[0], rcarg);
1524 	if(olddir >= 0){
1525 		fchdir(olddir);
1526 		close(olddir);
1527 	}
1528 	if(ret >= 0){
1529 		if(cpid)
1530 			sendul(cpid, ret);
1531 		threadexits(nil);
1532 	}
1533 	warning(nil, "exec rc: %r\n");
1534 
1535    Fail:
1536 	/* threadexec hasn't happened, so send a zero */
1537 	close(sfd[0]);
1538 	close(sfd[1]);
1539 	if(sfd[2] != sfd[1])
1540 		close(sfd[2]);
1541 	sendul(cpid, 0);
1542 	threadexits(nil);
1543 }
1544 
1545 void
1546 runwaittask(void *v)
1547 {
1548 	Command *c;
1549 	Channel *cpid;
1550 	void **a;
1551 
1552 	threadsetname("runwaittask");
1553 	a = v;
1554 	c = a[0];
1555 	cpid = a[1];
1556 	free(a);
1557 	do
1558 		c->pid = recvul(cpid);
1559 	while(c->pid == ~0);
1560 	free(c->av);
1561 	if(c->pid != 0)	/* successful exec */
1562 		sendp(ccommand, c);
1563 	else{
1564 		if(c->iseditcmd)
1565 			sendul(cedit, 0);
1566 		free(c->name);
1567 		free(c->text);
1568 		free(c);
1569 	}
1570 	chanfree(cpid);
1571 }
1572 
1573 void
1574 run(Window *win, char *s, Rune *rdir, int ndir, int newns, char *argaddr, char *xarg, int iseditcmd)
1575 {
1576 	void **arg;
1577 	Command *c;
1578 	Channel *cpid;
1579 
1580 	if(s == nil)
1581 		return;
1582 
1583 	arg = emalloc(10*sizeof(void*));
1584 	c = emalloc(sizeof *c);
1585 	cpid = chancreate(sizeof(ulong), 0);
1586 	chansetname(cpid, "cpid %s", s);
1587 	arg[0] = win;
1588 	arg[1] = s;
1589 	arg[2] = rdir;
1590 	arg[3] = (void*)ndir;
1591 	arg[4] = (void*)newns;
1592 	arg[5] = argaddr;
1593 	arg[6] = xarg;
1594 	arg[7] = c;
1595 	arg[8] = cpid;
1596 	arg[9] = (void*)iseditcmd;
1597 	threadcreate(runproc, arg, STACK);
1598 	/* mustn't block here because must be ready to answer mount() call in run() */
1599 	arg = emalloc(2*sizeof(void*));
1600 	arg[0] = c;
1601 	arg[1] = cpid;
1602 	threadcreate(runwaittask, arg, STACK);
1603 }