xref: /plan9/sys/src/cmd/acme/exec.c (revision 671dfc474d1a5bcbeda8be1356d2abfa05b91489) 
1 #include <u.h>
2 #include <libc.h>
3 #include <draw.h>
4 #include <thread.h>
5 #include <cursor.h>
6 #include <mouse.h>
7 #include <keyboard.h>
8 #include <frame.h>
9 #include <fcall.h>
10 #include <plumb.h>
11 #include "dat.h"
12 #include "fns.h"
13 
14 Buffer	snarfbuf;
15 
16 /*
17  * These functions get called as:
18  *
19  *	fn(et, t, argt, flag1, flag1, flag2, s, n);
20  *
21  * Where the arguments are:
22  *
23  *	et: the Text* in which the executing event (click) occurred
24  *	t: the Text* containing the current selection (Edit, Cut, Snarf, Paste)
25  *	argt: the Text* containing the argument for a 2-1 click.
26  *	e->flag1: from Exectab entry
27  * 	e->flag2: from Exectab entry
28  *	s: the command line remainder (e.g., "x" if executing "Dump x")
29  *	n: length of s  (s is *not* NUL-terminated)
30  */
31 
32 void	del(Text*, Text*, Text*, int, int, Rune*, int);
33 void	delcol(Text*, Text*, Text*, int, int, Rune*, int);
34 void	dump(Text*, Text*, Text*, int, int, Rune*, int);
35 void	edit(Text*, Text*, Text*, int, int, Rune*, int);
36 void	exit(Text*, Text*, Text*, int, int, Rune*, int);
37 void	fontx(Text*, Text*, Text*, int, int, Rune*, int);
38 void	get(Text*, Text*, Text*, int, int, Rune*, int);
39 void	id(Text*, Text*, Text*, int, int, Rune*, int);
40 void	incl(Text*, Text*, Text*, int, int, Rune*, int);
41 void	indent(Text*, Text*, Text*, int, int, Rune*, int);
42 void	kill(Text*, Text*, Text*, int, int, Rune*, int);
43 void	local(Text*, Text*, Text*, int, int, Rune*, int);
44 void	look(Text*, Text*, Text*, int, int, Rune*, int);
45 void	newcol(Text*, Text*, Text*, int, int, Rune*, int);
46 void	paste(Text*, Text*, Text*, int, int, Rune*, int);
47 void	put(Text*, Text*, Text*, int, int, Rune*, int);
48 void	putall(Text*, Text*, Text*, int, int, Rune*, int);
49 void	sendx(Text*, Text*, Text*, int, int, Rune*, int);
50 void	sort(Text*, Text*, Text*, int, int, Rune*, int);
51 void	tab(Text*, Text*, Text*, int, int, Rune*, int);
52 void	zeroxx(Text*, Text*, Text*, int, int, Rune*, int);
53 
54 typedef struct Exectab Exectab;
55 struct Exectab
56 {
57 	Rune	*name;
58 	void	(*fn)(Text*, Text*, Text*, int, int, Rune*, int);
59 	int		mark;
60 	int		flag1;
61 	int		flag2;
62 };
63 
64 Exectab exectab[] = {
65 	{ L"Cut",		cut,		TRUE,	TRUE,	TRUE	},
66 	{ L"Del",		del,		FALSE,	FALSE,	XXX		},
67 	{ L"Delcol",	delcol,	FALSE,	XXX,		XXX		},
68 	{ L"Delete",	del,		FALSE,	TRUE,	XXX		},
69 	{ L"Dump",	dump,	FALSE,	TRUE,	XXX		},
70 	{ L"Edit",		edit,		FALSE,	XXX,		XXX		},
71 	{ L"Exit",		exit,		FALSE,	XXX,		XXX		},
72 	{ L"Font",		fontx,	FALSE,	XXX,		XXX		},
73 	{ L"Get",		get,		FALSE,	TRUE,	XXX		},
74 	{ L"ID",		id,		FALSE,	XXX,		XXX		},
75 	{ L"Incl",		incl,		FALSE,	XXX,		XXX		},
76 	{ L"Indent",	indent,	FALSE,	XXX,		XXX		},
77 	{ L"Kill",		kill,		FALSE,	XXX,		XXX		},
78 	{ L"Load",		dump,	FALSE,	FALSE,	XXX		},
79 	{ L"Local",		local,	FALSE,	XXX,		XXX		},
80 	{ L"Look",		look,		FALSE,	XXX,		XXX		},
81 	{ L"New",		new,		FALSE,	XXX,		XXX		},
82 	{ L"Newcol",	newcol,	FALSE,	XXX,		XXX		},
83 	{ L"Paste",		paste,	TRUE,	TRUE,	XXX		},
84 	{ L"Put",		put,		FALSE,	XXX,		XXX		},
85 	{ L"Putall",		putall,	FALSE,	XXX,		XXX		},
86 	{ L"Redo",		undo,	FALSE,	FALSE,	XXX		},
87 	{ L"Send",		sendx,	TRUE,	XXX,		XXX		},
88 	{ L"Snarf",		cut,		FALSE,	TRUE,	FALSE	},
89 	{ L"Sort",		sort,		FALSE,	XXX,		XXX		},
90 	{ L"Tab",		tab,		FALSE,	XXX,		XXX		},
91 	{ L"Undo",		undo,	FALSE,	TRUE,	XXX		},
92 	{ L"Zerox",	zeroxx,	FALSE,	XXX,		XXX		},
93 	{ nil, 			nil,		0,		0,		0		},
94 };
95 
96 Exectab*
lookup(Rune * r,int n)97 lookup(Rune *r, int n)
98 {
99 	Exectab *e;
100 	int nr;
101 
102 	r = skipbl(r, n, &n);
103 	if(n == 0)
104 		return nil;
105 	findbl(r, n, &nr);
106 	nr = n-nr;
107 	for(e=exectab; e->name; e++)
108 		if(runeeq(r, nr, e->name, runestrlen(e->name)) == TRUE)
109 			return e;
110 	return nil;
111 }
112 
113 int
isexecc(int c)114 isexecc(int c)
115 {
116 	if(isfilec(c))
117 		return 1;
118 	return c=='<' || c=='|' || c=='>';
119 }
120 
121 void
execute(Text * t,uint aq0,uint aq1,int external,Text * argt)122 execute(Text *t, uint aq0, uint aq1, int external, Text *argt)
123 {
124 	uint q0, q1;
125 	Rune *r, *s;
126 	char *b, *a, *aa;
127 	Exectab *e;
128 	int c, n, f;
129 	Runestr dir;
130 
131 	q0 = aq0;
132 	q1 = aq1;
133 	if(q1 == q0){	/* expand to find word (actually file name) */
134 		/* if in selection, choose selection */
135 		if(t->q1>t->q0 && t->q0<=q0 && q0<=t->q1){
136 			q0 = t->q0;
137 			q1 = t->q1;
138 		}else{
139 			while(q1<t->file->nc && isexecc(c=textreadc(t, q1)) && c!=':')
140 				q1++;
141 			while(q0>0 && isexecc(c=textreadc(t, q0-1)) && c!=':')
142 				q0--;
143 			if(q1 == q0)
144 				return;
145 		}
146 	}
147 	r = runemalloc(q1-q0);
148 	bufread(t->file, q0, r, q1-q0);
149 	e = lookup(r, q1-q0);
150 	if(!external && t->w!=nil && t->w->nopen[QWevent]>0){
151 		f = 0;
152 		if(e)
153 			f |= 1;
154 		if(q0!=aq0 || q1!=aq1){
155 			bufread(t->file, aq0, r, aq1-aq0);
156 			f |= 2;
157 		}
158 		aa = getbytearg(argt, TRUE, TRUE, &a);
159 		if(a){
160 			if(strlen(a) > EVENTSIZE){	/* too big; too bad */
161 				free(aa);
162 				free(a);
163 				warning(nil, "`argument string too long\n");
164 				return;
165 			}
166 			f |= 8;
167 		}
168 		c = 'x';
169 		if(t->what == Body)
170 			c = 'X';
171 		n = aq1-aq0;
172 		if(n <= EVENTSIZE)
173 			winevent(t->w, "%c%d %d %d %d %.*S\n", c, aq0, aq1, f, n, n, r);
174 		else
175 			winevent(t->w, "%c%d %d %d 0 \n", c, aq0, aq1, f, n);
176 		if(q0!=aq0 || q1!=aq1){
177 			n = q1-q0;
178 			bufread(t->file, q0, r, n);
179 			if(n <= EVENTSIZE)
180 				winevent(t->w, "%c%d %d 0 %d %.*S\n", c, q0, q1, n, n, r);
181 			else
182 				winevent(t->w, "%c%d %d 0 0 \n", c, q0, q1, n);
183 		}
184 		if(a){
185 			winevent(t->w, "%c0 0 0 %d %s\n", c, utflen(a), a);
186 			if(aa)
187 				winevent(t->w, "%c0 0 0 %d %s\n", c, utflen(aa), aa);
188 			else
189 				winevent(t->w, "%c0 0 0 0 \n", c);
190 		}
191 		free(r);
192 		free(aa);
193 		free(a);
194 		return;
195 	}
196 	if(e){
197 		if(e->mark && seltext!=nil)
198 		if(seltext->what == Body){
199 			seq++;
200 			filemark(seltext->w->body.file);
201 		}
202 		s = skipbl(r, q1-q0, &n);
203 		s = findbl(s, n, &n);
204 		s = skipbl(s, n, &n);
205 		(*e->fn)(t, seltext, argt, e->flag1, e->flag2, s, n);
206 		free(r);
207 		return;
208 	}
209 
210 	b = runetobyte(r, q1-q0);
211 	free(r);
212 	dir = dirname(t, nil, 0);
213 	if(dir.nr==1 && dir.r[0]=='.'){	/* sigh */
214 		free(dir.r);
215 		dir.r = nil;
216 		dir.nr = 0;
217 	}
218 	aa = getbytearg(argt, TRUE, TRUE, &a);
219 	if(t->w)
220 		incref(t->w);
221 	run(t->w, b, dir.r, dir.nr, TRUE, aa, a, FALSE);
222 }
223 
224 char*
printarg(Text * argt,uint q0,uint q1)225 printarg(Text *argt, uint q0, uint q1)
226 {
227 	char *buf;
228 
229 	if(argt->what!=Body || argt->file->name==nil)
230 		return nil;
231 	buf = emalloc(argt->file->nname+32);
232 	if(q0 == q1)
233 		sprint(buf, "%.*S:#%d", argt->file->nname, argt->file->name, q0);
234 	else
235 		sprint(buf, "%.*S:#%d,#%d", argt->file->nname, argt->file->name, q0, q1);
236 	return buf;
237 }
238 
239 char*
getarg(Text * argt,int doaddr,int dofile,Rune ** rp,int * nrp)240 getarg(Text *argt, int doaddr, int dofile, Rune **rp, int *nrp)
241 {
242 	int n;
243 	Expand e;
244 	char *a;
245 
246 	*rp = nil;
247 	*nrp = 0;
248 	if(argt == nil)
249 		return nil;
250 	a = nil;
251 	textcommit(argt, TRUE);
252 	if(expand(argt, argt->q0, argt->q1, &e)){
253 		free(e.bname);
254 		if(e.nname && dofile){
255 			e.name = runerealloc(e.name, e.nname+1);
256 			if(doaddr)
257 				a = printarg(argt, e.q0, e.q1);
258 			*rp = e.name;
259 			*nrp = e.nname;
260 			return a;
261 		}
262 		free(e.name);
263 	}else{
264 		e.q0 = argt->q0;
265 		e.q1 = argt->q1;
266 	}
267 	n = e.q1 - e.q0;
268 	*rp = runemalloc(n+1);
269 	bufread(argt->file, e.q0, *rp, n);
270 	if(doaddr)
271 		a = printarg(argt, e.q0, e.q1);
272 	*nrp = n;
273 	return a;
274 }
275 
276 char*
getbytearg(Text * argt,int doaddr,int dofile,char ** bp)277 getbytearg(Text *argt, int doaddr, int dofile, char **bp)
278 {
279 	Rune *r;
280 	int n;
281 	char *aa;
282 
283 	*bp = nil;
284 	aa = getarg(argt, doaddr, dofile, &r, &n);
285 	if(r == nil)
286 		return nil;
287 	*bp = runetobyte(r, n);
288 	free(r);
289 	return aa;
290 }
291 
292 void
newcol(Text * et,Text *,Text *,int,int,Rune *,int)293 newcol(Text *et, Text*, Text*, int, int, Rune*, int)
294 {
295 	Column *c;
296 
297 	c = rowadd(et->row, nil, -1);
298 	if(c)
299 		winsettag(coladd(c, nil, nil, -1));
300 }
301 
302 void
delcol(Text * et,Text *,Text *,int,int,Rune *,int)303 delcol(Text *et, Text*, Text*, int, int, Rune*, int)
304 {
305 	int i;
306 	Column *c;
307 	Window *w;
308 
309 	c = et->col;
310 	if(c==nil || colclean(c)==0)
311 		return;
312 	for(i=0; i<c->nw; i++){
313 		w = c->w[i];
314 		if(w->nopen[QWevent]+w->nopen[QWaddr]+w->nopen[QWdata]+w->nopen[QWxdata] > 0){
315 			warning(nil, "can't delete column; %.*S is running an external command\n", w->body.file->nname, w->body.file->name);
316 			return;
317 		}
318 	}
319 	rowclose(et->col->row, et->col, TRUE);
320 }
321 
322 void
del(Text * et,Text *,Text * argt,int flag1,int,Rune * arg,int narg)323 del(Text *et, Text*, Text *argt, int flag1, int, Rune *arg, int narg)
324 {
325 	Window *w;
326 	char *name, *p;
327 	Plumbmsg *pm;
328 
329 	if(et->col==nil || et->w == nil)
330 		return;
331 	if(flag1 || et->w->body.file->ntext>1 || winclean(et->w, FALSE)){
332 		w = et->w;
333 		name = getname(&w->body, argt, arg, narg, TRUE);
334 		if(name && plumbsendfd >= 0){
335 			pm = emalloc(sizeof(Plumbmsg));
336 			pm->src = estrdup("acme");
337 			pm->dst = estrdup("close");
338 			pm->wdir = estrdup(name);
339 			if(p = strrchr(pm->wdir, '/'))
340 				*p = '\0';
341 			pm->type = estrdup("text");
342 			pm->attr = nil;
343 			pm->data = estrdup(name);
344 			pm->ndata = strlen(pm->data);
345 			if(pm->ndata < messagesize-1024)
346 				plumbsend(plumbsendfd, pm);
347 			else
348 				plumbfree(pm);
349 		}
350 		colclose(et->col, et->w, TRUE);
351 	}
352 }
353 
354 void
sort(Text * et,Text *,Text *,int,int,Rune *,int)355 sort(Text *et, Text*, Text*, int, int, Rune*, int)
356 {
357 	if(et->col)
358 		colsort(et->col);
359 }
360 
361 uint
seqof(Window * w,int isundo)362 seqof(Window *w, int isundo)
363 {
364 	/* if it's undo, see who changed with us */
365 	if(isundo)
366 		return w->body.file->seq;
367 	/* if it's redo, see who we'll be sync'ed up with */
368 	return fileredoseq(w->body.file);
369 }
370 
371 void
undo(Text * et,Text *,Text *,int flag1,int,Rune *,int)372 undo(Text *et, Text*, Text*, int flag1, int, Rune*, int)
373 {
374 	int i, j;
375 	Column *c;
376 	Window *w;
377 	uint seq;
378 
379 	if(et==nil || et->w== nil)
380 		return;
381 	seq = seqof(et->w, flag1);
382 	if(seq == 0){
383 		/* nothing to undo */
384 		return;
385 	}
386 	/*
387 	 * Undo the executing window first. Its display will update. other windows
388 	 * in the same file will not call show() and jump to a different location in the file.
389 	 * Simultaneous changes to other files will be chaotic, however.
390 	 */
391 	winundo(et->w, flag1);
392 	for(i=0; i<row.ncol; i++){
393 		c = row.col[i];
394 		for(j=0; j<c->nw; j++){
395 			w = c->w[j];
396 			if(w == et->w)
397 				continue;
398 			if(seqof(w, flag1) == seq)
399 				winundo(w, flag1);
400 		}
401 	}
402 }
403 
404 char*
getname(Text * t,Text * argt,Rune * arg,int narg,int isput)405 getname(Text *t, Text *argt, Rune *arg, int narg, int isput)
406 {
407 	char *s;
408 	Rune *r;
409 	int i, n, promote;
410 	Runestr dir;
411 
412 	getarg(argt, FALSE, TRUE, &r, &n);
413 	promote = FALSE;
414 	if(r == nil)
415 		promote = TRUE;
416 	else if(isput){
417 		/* if are doing a Put, want to synthesize name even for non-existent file */
418 		/* best guess is that file name doesn't contain a slash */
419 		promote = TRUE;
420 		for(i=0; i<n; i++)
421 			if(r[i] == '/'){
422 				promote = FALSE;
423 				break;
424 			}
425 		if(promote){
426 			t = argt;
427 			arg = r;
428 			narg = n;
429 		}
430 	}
431 	if(promote){
432 		n = narg;
433 		if(n <= 0){
434 			s = runetobyte(t->file->name, t->file->nname);
435 			return s;
436 		}
437 		/* prefix with directory name if necessary */
438 		dir.r = nil;
439 		dir.nr = 0;
440 		if(n>0 && arg[0]!='/'){
441 			dir = dirname(t, nil, 0);
442 			if(dir.nr==1 && dir.r[0]=='.'){	/* sigh */
443 				free(dir.r);
444 				dir.r = nil;
445 				dir.nr = 0;
446 			}
447 		}
448 		if(dir.r){
449 			r = runemalloc(dir.nr+n+1);
450 			runemove(r, dir.r, dir.nr);
451 			free(dir.r);
452 			if(dir.nr>0 && r[dir.nr]!='/' && n>0 && arg[0]!='/')
453 				r[dir.nr++] = '/';
454 			runemove(r+dir.nr, arg, n);
455 			n += dir.nr;
456 		}else{
457 			r = runemalloc(n+1);
458 			runemove(r, arg, n);
459 		}
460 	}
461 	s = runetobyte(r, n);
462 	free(r);
463 	if(strlen(s) == 0){
464 		free(s);
465 		s = nil;
466 	}
467 	return s;
468 }
469 
470 void
zeroxx(Text * et,Text * t,Text *,int,int,Rune *,int)471 zeroxx(Text *et, Text *t, Text*, int, int, Rune*, int)
472 {
473 	Window *nw;
474 	int c, locked;
475 
476 	locked = FALSE;
477 	if(t!=nil && t->w!=nil && t->w!=et->w){
478 		locked = TRUE;
479 		c = 'M';
480 		if(et->w)
481 			c = et->w->owner;
482 		winlock(t->w, c);
483 	}
484 	if(t == nil)
485 		t = et;
486 	if(t==nil || t->w==nil)
487 		return;
488 	t = &t->w->body;
489 	if(t->w->isdir)
490 		warning(nil, "%.*S is a directory; Zerox illegal\n", t->file->nname, t->file->name);
491 	else{
492 		nw = coladd(t->w->col, nil, t->w, -1);
493 		/* ugly: fix locks so w->unlock works */
494 		winlock1(nw, t->w->owner);
495 	}
496 	if(locked)
497 		winunlock(t->w);
498 }
499 
500 void
get(Text * et,Text * t,Text * argt,int flag1,int,Rune * arg,int narg)501 get(Text *et, Text *t, Text *argt, int flag1, int, Rune *arg, int narg)
502 {
503 	char *name;
504 	Rune *r;
505 	int i, n, dirty, samename, isdir;
506 	Window *w;
507 	Text *u;
508 	Dir *d;
509 
510 	if(flag1)
511 		if(et==nil || et->w==nil)
512 			return;
513 	if(!et->w->isdir && (et->w->body.file->nc>0 && !winclean(et->w, TRUE)))
514 		return;
515 	w = et->w;
516 	t = &w->body;
517 	name = getname(t, argt, arg, narg, FALSE);
518 	if(name == nil){
519 		warning(nil, "no file name\n");
520 		return;
521 	}
522 	if(t->file->ntext>1){
523 		d = dirstat(name);
524 		isdir = (d!=nil && (d->qid.type & QTDIR));
525 		free(d);
526 		if(isdir){
527 			warning(nil, "%s is a directory; can't read with multiple windows on it\n", name);
528 			return;
529 		}
530 	}
531 	r = bytetorune(name, &n);
532 	for(i=0; i<t->file->ntext; i++){
533 		u = t->file->text[i];
534 		/* second and subsequent calls with zero an already empty buffer, but OK */
535 		textreset(u);
536 		windirfree(u->w);
537 	}
538 	samename = runeeq(r, n, t->file->name, t->file->nname);
539 	textload(t, 0, name, samename);
540 	if(samename){
541 		t->file->mod = FALSE;
542 		dirty = FALSE;
543 	}else{
544 		t->file->mod = TRUE;
545 		dirty = TRUE;
546 	}
547 	for(i=0; i<t->file->ntext; i++)
548 		t->file->text[i]->w->dirty = dirty;
549 	free(name);
550 	free(r);
551 	winsettag(w);
552 	t->file->unread = FALSE;
553 	for(i=0; i<t->file->ntext; i++){
554 		u = t->file->text[i];
555 		textsetselect(&u->w->tag, u->w->tag.file->nc, u->w->tag.file->nc);
556 		textscrdraw(u);
557 	}
558 }
559 
560 void
putfile(File * f,int q0,int q1,Rune * namer,int nname)561 putfile(File *f, int q0, int q1, Rune *namer, int nname)
562 {
563 	uint n, m;
564 	Rune *r;
565 	char *s, *name, *p;
566 	int i, fd, q;
567 	Dir *d, *d1;
568 	Window *w;
569 	Plumbmsg *pm;
570 	int isapp;
571 
572 	w = f->curtext->w;
573 	name = runetobyte(namer, nname);
574 	d = dirstat(name);
575 	if(d!=nil && runeeq(namer, nname, f->name, f->nname)){
576 		/* f->mtime+1 because when talking over NFS it's often off by a second */
577 		if(f->dev!=d->dev || f->qidpath!=d->qid.path || f->mtime+1<d->mtime){
578 			f->dev = d->dev;
579 			f->qidpath = d->qid.path;
580 			f->mtime = d->mtime;
581 			if(f->unread)
582 				warning(nil, "%s not written; file already exists\n", name);
583 			else
584 				warning(nil, "%s modified%s%s since last read\n", name, d->muid[0]?" by ":"", d->muid);
585 			goto Rescue1;
586 		}
587 	}
588 	fd = create(name, OWRITE, 0666);
589 	if(fd < 0){
590 		warning(nil, "can't create file %s: %r\n", name);
591 		goto Rescue1;
592 	}
593 	r = fbufalloc();
594 	s = fbufalloc();
595 	free(d);
596 	d = dirfstat(fd);
597 	isapp = (d!=nil && d->length>0 && (d->qid.type&QTAPPEND));
598 	if(isapp){
599 		warning(nil, "%s not written; file is append only\n", name);
600 		goto Rescue2;
601 	}
602 
603 	for(q=q0; q<q1; q+=n){
604 		n = q1 - q;
605 		if(n > BUFSIZE/UTFmax)
606 			n = BUFSIZE/UTFmax;
607 		bufread(f, q, r, n);
608 		m = snprint(s, BUFSIZE+1, "%.*S", n, r);
609 		if(write(fd, s, m) != m){
610 			warning(nil, "can't write file %s: %r\n", name);
611 			goto Rescue2;
612 		}
613 	}
614 	if(runeeq(namer, nname, f->name, f->nname)){
615 		if(q0!=0 || q1!=f->nc){
616 			f->mod = TRUE;
617 			w->dirty = TRUE;
618 			f->unread = TRUE;
619 		}else{
620 			d1 = dirfstat(fd);
621 			if(d1 != nil){
622 				free(d);
623 				d = d1;
624 			}
625 			f->qidpath = d->qid.path;
626 			f->dev = d->dev;
627 			f->mtime = d->mtime;
628 			f->mod = FALSE;
629 			w->dirty = FALSE;
630 			f->unread = FALSE;
631 		}
632 		for(i=0; i<f->ntext; i++){
633 			f->text[i]->w->putseq = f->seq;
634 			f->text[i]->w->dirty = w->dirty;
635 		}
636 	}
637 	if(plumbsendfd >= 0){
638 		pm = emalloc(sizeof(Plumbmsg));
639 		pm->src = estrdup("acme");
640 		pm->dst = estrdup("put");
641 		pm->wdir = estrdup(name);
642 		if(p = strrchr(pm->wdir, '/'))
643 			*p = '\0';
644 		pm->type = estrdup("text");
645 		pm->attr = nil;
646 		pm->data = estrdup(name);
647 		pm->ndata = strlen(pm->data);
648 		if(pm->ndata < messagesize-1024)
649 			plumbsend(plumbsendfd, pm);
650 		else
651 			plumbfree(pm);
652 	}
653 	fbuffree(s);
654 	fbuffree(r);
655 	free(d);
656 	free(namer);
657 	free(name);
658 	close(fd);
659 	winsettag(w);
660 	return;
661 
662     Rescue2:
663 	fbuffree(s);
664 	fbuffree(r);
665 	close(fd);
666 	/* fall through */
667 
668     Rescue1:
669 	free(d);
670 	free(namer);
671 	free(name);
672 }
673 
674 void
put(Text * et,Text *,Text * argt,int,int,Rune * arg,int narg)675 put(Text *et, Text*, Text *argt, int, int, Rune *arg, int narg)
676 {
677 	int nname;
678 	Rune  *namer;
679 	Window *w;
680 	File *f;
681 	char *name;
682 
683 	if(et==nil || et->w==nil || et->w->isdir)
684 		return;
685 	w = et->w;
686 	f = w->body.file;
687 	name = getname(&w->body, argt, arg, narg, TRUE);
688 	if(name == nil){
689 		warning(nil, "no file name\n");
690 		return;
691 	}
692 	namer = bytetorune(name, &nname);
693 	putfile(f, 0, f->nc, namer, nname);
694 	free(name);
695 }
696 
697 void
dump(Text *,Text *,Text * argt,int isdump,int,Rune * arg,int narg)698 dump(Text *, Text *, Text *argt, int isdump, int, Rune *arg, int narg)
699 {
700 	char *name;
701 
702 	if(narg)
703 		name = runetobyte(arg, narg);
704 	else
705 		getbytearg(argt, FALSE, TRUE, &name);
706 	if(isdump)
707 		rowdump(&row, name);
708 	else
709 		rowload(&row, name, FALSE);
710 	free(name);
711 }
712 
713 void
cut(Text * et,Text * t,Text *,int dosnarf,int docut,Rune *,int)714 cut(Text *et, Text *t, Text*, int dosnarf, int docut, Rune*, int)
715 {
716 	uint q0, q1, n, locked, c;
717 	Rune *r;
718 
719 	/*
720 	 * if not executing a mouse chord (et != t) and snarfing (dosnarf)
721 	 * and executed Cut or Snarf in window tag (et->w != nil),
722 	 * then use the window body selection or the tag selection
723 	 * or do nothing at all.
724 	 */
725 	if(et!=t && dosnarf && et->w!=nil){
726 		if(et->w->body.q1>et->w->body.q0){
727 			t = &et->w->body;
728 			if(docut)
729 				filemark(t->file);	/* seq has been incremented by execute */
730 		}else if(et->w->tag.q1>et->w->tag.q0)
731 			t = &et->w->tag;
732 		else
733 			t = nil;
734 	}
735 	if(t == nil)	/* no selection */
736 		return;
737 
738 	locked = FALSE;
739 	if(t->w!=nil && et->w!=t->w){
740 		locked = TRUE;
741 		c = 'M';
742 		if(et->w)
743 			c = et->w->owner;
744 		winlock(t->w, c);
745 	}
746 	if(t->q0 == t->q1){
747 		if(locked)
748 			winunlock(t->w);
749 		return;
750 	}
751 	if(dosnarf){
752 		q0 = t->q0;
753 		q1 = t->q1;
754 		bufdelete(&snarfbuf, 0, snarfbuf.nc);
755 		r = fbufalloc();
756 		while(q0 < q1){
757 			n = q1 - q0;
758 			if(n > RBUFSIZE)
759 				n = RBUFSIZE;
760 			bufread(t->file, q0, r, n);
761 			bufinsert(&snarfbuf, snarfbuf.nc, r, n);
762 			q0 += n;
763 		}
764 		fbuffree(r);
765 		putsnarf();
766 	}
767 	if(docut){
768 		textdelete(t, t->q0, t->q1, TRUE);
769 		textsetselect(t, t->q0, t->q0);
770 		if(t->w){
771 			textscrdraw(t);
772 			winsettag(t->w);
773 		}
774 	}else if(dosnarf)	/* Snarf command */
775 		argtext = t;
776 	if(locked)
777 		winunlock(t->w);
778 }
779 
780 void
paste(Text * et,Text * t,Text *,int selectall,int tobody,Rune *,int)781 paste(Text *et, Text *t, Text*, int selectall, int tobody, Rune*, int)
782 {
783 	int c;
784 	uint q, q0, q1, n;
785 	Rune *r;
786 
787 	/* if(tobody), use body of executing window  (Paste or Send command) */
788 	if(tobody && et!=nil && et->w!=nil){
789 		t = &et->w->body;
790 		filemark(t->file);	/* seq has been incremented by execute */
791 	}
792 	if(t == nil)
793 		return;
794 
795 	getsnarf();
796 	if(t==nil || snarfbuf.nc==0)
797 		return;
798 	if(t->w!=nil && et->w!=t->w){
799 		c = 'M';
800 		if(et->w)
801 			c = et->w->owner;
802 		winlock(t->w, c);
803 	}
804 	cut(t, t, nil, FALSE, TRUE, nil, 0);
805 	q = 0;
806 	q0 = t->q0;
807 	q1 = t->q0+snarfbuf.nc;
808 	r = fbufalloc();
809 	while(q0 < q1){
810 		n = q1 - q0;
811 		if(n > RBUFSIZE)
812 			n = RBUFSIZE;
813 		if(r == nil)
814 			r = runemalloc(n);
815 		bufread(&snarfbuf, q, r, n);
816 		textinsert(t, q0, r, n, TRUE);
817 		q += n;
818 		q0 += n;
819 	}
820 	fbuffree(r);
821 	if(selectall)
822 		textsetselect(t, t->q0, q1);
823 	else
824 		textsetselect(t, q1, q1);
825 	if(t->w){
826 		textscrdraw(t);
827 		winsettag(t->w);
828 	}
829 	if(t->w!=nil && et->w!=t->w)
830 		winunlock(t->w);
831 }
832 
833 void
look(Text * et,Text * t,Text * argt,int,int,Rune * arg,int narg)834 look(Text *et, Text *t, Text *argt, int, int, Rune *arg, int narg)
835 {
836 	Rune *r;
837 	int n;
838 
839 	if(et && et->w){
840 		t = &et->w->body;
841 		if(narg > 0){
842 			search(t, arg, narg);
843 			return;
844 		}
845 		getarg(argt, FALSE, FALSE, &r, &n);
846 		if(r == nil){
847 			n = t->q1-t->q0;
848 			r = runemalloc(n);
849 			bufread(t->file, t->q0, r, n);
850 		}
851 		search(t, r, n);
852 		free(r);
853 	}
854 }
855 
856 void
sendx(Text * et,Text * t,Text *,int,int,Rune *,int)857 sendx(Text *et, Text *t, Text*, int, int, Rune*, int)
858 {
859 	if(et->w==nil)
860 		return;
861 	t = &et->w->body;
862 	if(t->q0 != t->q1)
863 		cut(t, t, nil, TRUE, FALSE, nil, 0);
864 	textsetselect(t, t->file->nc, t->file->nc);
865 	paste(t, t, nil, TRUE, TRUE, nil, 0);
866 	if(textreadc(t, t->file->nc-1) != '\n'){
867 		textinsert(t, t->file->nc, L"\n", 1, TRUE);
868 		textsetselect(t, t->file->nc, t->file->nc);
869 	}
870 }
871 
872 void
edit(Text * et,Text *,Text * argt,int,int,Rune * arg,int narg)873 edit(Text *et, Text*, Text *argt, int, int, Rune *arg, int narg)
874 {
875 	Rune *r;
876 	int len;
877 
878 	if(et == nil)
879 		return;
880 	getarg(argt, FALSE, TRUE, &r, &len);
881 	seq++;
882 	if(r != nil){
883 		editcmd(et, r, len);
884 		free(r);
885 	}else
886 		editcmd(et, arg, narg);
887 }
888 
889 void
exit(Text *,Text *,Text *,int,int,Rune *,int)890 exit(Text*, Text*, Text*, int, int, Rune*, int)
891 {
892 	if(rowclean(&row)){
893 		sendul(cexit, 0);
894 		threadexits(nil);
895 	}
896 }
897 
898 void
putall(Text *,Text *,Text *,int,int,Rune *,int)899 putall(Text*, Text*, Text*, int, int, Rune*, int)
900 {
901 	int i, j, e;
902 	Window *w;
903 	Column *c;
904 	char *a;
905 
906 	for(i=0; i<row.ncol; i++){
907 		c = row.col[i];
908 		for(j=0; j<c->nw; j++){
909 			w = c->w[j];
910 			if(w->isscratch || w->isdir || w->body.file->nname==0)
911 				continue;
912 			if(w->nopen[QWevent] > 0)
913 				continue;
914 			a = runetobyte(w->body.file->name, w->body.file->nname);
915 			e = access(a, 0);
916 			if(w->body.file->mod || w->body.ncache)
917 				if(e < 0)
918 					warning(nil, "no auto-Put of %s: %r\n", a);
919 				else{
920 					wincommit(w, &w->body);
921 					put(&w->body, nil, nil, XXX, XXX, nil, 0);
922 				}
923 			free(a);
924 		}
925 	}
926 }
927 
928 
929 void
id(Text * et,Text *,Text *,int,int,Rune *,int)930 id(Text *et, Text*, Text*, int, int, Rune*, int)
931 {
932 	if(et && et->w)
933 		warning(nil, "/mnt/acme/%d/\n", et->w->id);
934 }
935 
936 void
local(Text * et,Text *,Text * argt,int,int,Rune * arg,int narg)937 local(Text *et, Text*, Text *argt, int, int, Rune *arg, int narg)
938 {
939 	char *a, *aa;
940 	Runestr dir;
941 
942 	aa = getbytearg(argt, TRUE, TRUE, &a);
943 
944 	dir = dirname(et, nil, 0);
945 	if(dir.nr==1 && dir.r[0]=='.'){	/* sigh */
946 		free(dir.r);
947 		dir.r = nil;
948 		dir.nr = 0;
949 	}
950 	run(nil, runetobyte(arg, narg), dir.r, dir.nr, FALSE, aa, a, FALSE);
951 }
952 
953 void
kill(Text *,Text *,Text * argt,int,int,Rune * arg,int narg)954 kill(Text*, Text*, Text *argt, int, int, Rune *arg, int narg)
955 {
956 	Rune *a, *cmd, *r;
957 	int na;
958 
959 	getarg(argt, FALSE, FALSE, &r, &na);
960 	if(r)
961 		kill(nil, nil, nil, 0, 0, r, na);
962 	/* loop condition: *arg is not a blank */
963 	for(;;){
964 		a = findbl(arg, narg, &na);
965 		if(a == arg)
966 			break;
967 		cmd = runemalloc(narg-na+1);
968 		runemove(cmd, arg, narg-na);
969 		sendp(ckill, cmd);
970 		arg = skipbl(a, na, &narg);
971 	}
972 }
973 
974 void
fontx(Text * et,Text * t,Text * argt,int,int,Rune * arg,int narg)975 fontx(Text *et, Text *t, Text *argt, int, int, Rune *arg, int narg)
976 {
977 	Rune *a, *r, *flag, *file;
978 	int na, nf;
979 	char *aa;
980 	Reffont *newfont;
981 	Dirlist *dp;
982 	int i, fix;
983 
984 	if(et==nil || et->w==nil)
985 		return;
986 	t = &et->w->body;
987 	flag = nil;
988 	file = nil;
989 	/* loop condition: *arg is not a blank */
990 	nf = 0;
991 	for(;;){
992 		a = findbl(arg, narg, &na);
993 		if(a == arg)
994 			break;
995 		r = runemalloc(narg-na+1);
996 		runemove(r, arg, narg-na);
997 		if(runeeq(r, narg-na, L"fix", 3) || runeeq(r, narg-na, L"var", 3)){
998 			free(flag);
999 			flag = r;
1000 		}else{
1001 			free(file);
1002 			file = r;
1003 			nf = narg-na;
1004 		}
1005 		arg = skipbl(a, na, &narg);
1006 	}
1007 	getarg(argt, FALSE, TRUE, &r, &na);
1008 	if(r)
1009 		if(runeeq(r, na, L"fix", 3) || runeeq(r, na, L"var", 3)){
1010 			free(flag);
1011 			flag = r;
1012 		}else{
1013 			free(file);
1014 			file = r;
1015 			nf = na;
1016 		}
1017 	fix = 1;
1018 	if(flag)
1019 		fix = runeeq(flag, runestrlen(flag), L"fix", 3);
1020 	else if(file == nil){
1021 		newfont = rfget(FALSE, FALSE, FALSE, nil);
1022 		if(newfont)
1023 			fix = strcmp(newfont->f->name, t->font->name)==0;
1024 	}
1025 	if(file){
1026 		aa = runetobyte(file, nf);
1027 		newfont = rfget(fix, flag!=nil, FALSE, aa);
1028 		free(aa);
1029 	}else
1030 		newfont = rfget(fix, FALSE, FALSE, nil);
1031 	if(newfont){
1032 		draw(screen, t->w->r, textcols[BACK], nil, ZP);
1033 		rfclose(t->reffont);
1034 		t->reffont = newfont;
1035 		t->font = newfont->f;
1036 		frinittick(t);
1037 		if(t->w->isdir){
1038 			t->all.min.x++;	/* force recolumnation; disgusting! */
1039 			for(i=0; i<t->w->ndl; i++){
1040 				dp = t->w->dlp[i];
1041 				aa = runetobyte(dp->r, dp->nr);
1042 				dp->wid = stringwidth(newfont->f, aa);
1043 				free(aa);
1044 			}
1045 		}
1046 		/* avoid shrinking of window due to quantization */
1047 		colgrow(t->w->col, t->w, -1);
1048 	}
1049 	free(file);
1050 	free(flag);
1051 }
1052 
1053 void
incl(Text * et,Text *,Text * argt,int,int,Rune * arg,int narg)1054 incl(Text *et, Text*, Text *argt, int, int, Rune *arg, int narg)
1055 {
1056 	Rune *a, *r;
1057 	Window *w;
1058 	int na, n, len;
1059 
1060 	if(et==nil || et->w==nil)
1061 		return;
1062 	w = et->w;
1063 	n = 0;
1064 	getarg(argt, FALSE, TRUE, &r, &len);
1065 	if(r){
1066 		n++;
1067 		winaddincl(w, r, len);
1068 	}
1069 	/* loop condition: *arg is not a blank */
1070 	for(;;){
1071 		a = findbl(arg, narg, &na);
1072 		if(a == arg)
1073 			break;
1074 		r = runemalloc(narg-na+1);
1075 		runemove(r, arg, narg-na);
1076 		n++;
1077 		winaddincl(w, r, narg-na);
1078 		arg = skipbl(a, na, &narg);
1079 	}
1080 	if(n==0 && w->nincl){
1081 		for(n=w->nincl; --n>=0; )
1082 			warning(nil, "%S ", w->incl[n]);
1083 		warning(nil, "\n");
1084 	}
1085 }
1086 
1087 enum {
1088 	IGlobal = -2,
1089 	IError = -1,
1090 	Ion = 0,
1091 	Ioff = 1,
1092 };
1093 
1094 static int
indentval(Rune * s,int n)1095 indentval(Rune *s, int n)
1096 {
1097 	if(n < 2)
1098 		return IError;
1099 	if(runestrncmp(s, L"ON", n) == 0){
1100 		globalautoindent = TRUE;
1101 		warning(nil, "Indent ON\n");
1102 		return IGlobal;
1103 	}
1104 	if(runestrncmp(s, L"OFF", n) == 0){
1105 		globalautoindent = FALSE;
1106 		warning(nil, "Indent OFF\n");
1107 		return IGlobal;
1108 	}
1109 	return runestrncmp(s, L"on", n) == 0;
1110 }
1111 
1112 static void
fixindent(Window * w,void *)1113 fixindent(Window *w, void*)
1114 {
1115 	w->autoindent = globalautoindent;
1116 }
1117 
1118 void
indent(Text * et,Text *,Text * argt,int,int,Rune * arg,int narg)1119 indent(Text *et, Text*, Text *argt, int, int, Rune *arg, int narg)
1120 {
1121 	Rune *a, *r;
1122 	Window *w;
1123 	int na, len, autoindent;
1124 
1125 	w = nil;
1126 	if(et!=nil && et->w!=nil)
1127 		w = et->w;
1128 	autoindent = IError;
1129 	getarg(argt, FALSE, TRUE, &r, &len);
1130 	if(r!=nil && len>0)
1131 		autoindent = indentval(r, len);
1132 	else{
1133 		a = findbl(arg, narg, &na);
1134 		if(a != arg)
1135 			autoindent = indentval(arg, narg-na);
1136 	}
1137 	if(autoindent == IGlobal)
1138 		allwindows(fixindent, nil);
1139 	else if(w != nil && autoindent >= 0)
1140 		w->autoindent = autoindent;
1141 }
1142 
1143 void
tab(Text * et,Text *,Text * argt,int,int,Rune * arg,int narg)1144 tab(Text *et, Text*, Text *argt, int, int, Rune *arg, int narg)
1145 {
1146 	Rune *a, *r;
1147 	Window *w;
1148 	int na, len, tab;
1149 	char *p;
1150 
1151 	if(et==nil || et->w==nil)
1152 		return;
1153 	w = et->w;
1154 	getarg(argt, FALSE, TRUE, &r, &len);
1155 	tab = 0;
1156 	if(r!=nil && len>0){
1157 		p = runetobyte(r, len);
1158 		if('0'<=p[0] && p[0]<='9')
1159 			tab = atoi(p);
1160 		free(p);
1161 	}else{
1162 		a = findbl(arg, narg, &na);
1163 		if(a != arg){
1164 			p = runetobyte(arg, narg-na);
1165 			if('0'<=p[0] && p[0]<='9')
1166 				tab = atoi(p);
1167 			free(p);
1168 		}
1169 	}
1170 	if(tab > 0){
1171 		if(w->body.tabstop != tab){
1172 			w->body.tabstop = tab;
1173 			winresize(w, w->r, 1);
1174 		}
1175 	}else
1176 		warning(nil, "%.*S: Tab %d\n", w->body.file->nname, w->body.file->name, w->body.tabstop);
1177 }
1178 
1179 void
runproc(void * argvp)1180 runproc(void *argvp)
1181 {
1182 	/* args: */
1183 		Window *win;
1184 		char *s;
1185 		Rune *rdir;
1186 		int ndir;
1187 		int newns;
1188 		char *argaddr;
1189 		char *arg;
1190 		Command *c;
1191 		Channel *cpid;
1192 		int iseditcmd;
1193 	/* end of args */
1194 	char *e, *t, *name, *filename, *dir, **av, *news;
1195 	Rune r, **incl;
1196 	int ac, w, inarg, i, n, fd, nincl, winid;
1197 	int pipechar;
1198 	char buf[512];
1199 	static void *parg[2];
1200 	void **argv;
1201 
1202 	argv = argvp;
1203 	win = argv[0];
1204 	s = argv[1];
1205 	rdir = argv[2];
1206 	ndir = (uintptr)argv[3];
1207 	newns = (uintptr)argv[4];
1208 	argaddr = argv[5];
1209 	arg = argv[6];
1210 	c = argv[7];
1211 	cpid = argv[8];
1212 	iseditcmd = (uintptr)argv[9];
1213 	free(argv);
1214 
1215 	t = s;
1216 	while(*t==' ' || *t=='\n' || *t=='\t')
1217 		t++;
1218 	for(e=t; *e; e++)
1219 		if(*e==' ' || *e=='\n' || *e=='\t' )
1220 			break;
1221 	name = emalloc((e-t)+2);
1222 	memmove(name, t, e-t);
1223 	name[e-t] = 0;
1224 	e = utfrrune(name, '/');
1225 	if(e)
1226 		memmove(name, e+1, strlen(e+1)+1);	/* strcpy but overlaps */
1227 	strcat(name, " ");	/* add blank here for ease in waittask */
1228 	c->name = bytetorune(name, &c->nname);
1229 	free(name);
1230 	pipechar = 0;
1231 	if(*t=='<' || *t=='|' || *t=='>')
1232 		pipechar = *t++;
1233 	c->iseditcmd = iseditcmd;
1234 	c->text = s;
1235 	if(rdir != nil){
1236 		dir = runetobyte(rdir, ndir);
1237 		chdir(dir);	/* ignore error: probably app. window */
1238 		free(dir);
1239 	}
1240 	if(newns){
1241 		nincl = 0;
1242 		incl = nil;
1243 		if(win){
1244 			filename = smprint("%.*S", win->body.file->nname, win->body.file->name);
1245 			nincl = win->nincl;
1246 			if(nincl > 0){
1247 				incl = emalloc(nincl*sizeof(Rune*));
1248 				for(i=0; i<nincl; i++){
1249 					n = runestrlen(win->incl[i]);
1250 					incl[i] = runemalloc(n+1);
1251 					runemove(incl[i], win->incl[i], n);
1252 				}
1253 			}
1254 			winid = win->id;
1255 		}else{
1256 			filename = nil;
1257 			winid = 0;
1258 			if(activewin)
1259 				winid = activewin->id;
1260 		}
1261 		rfork(RFNAMEG|RFENVG|RFFDG|RFNOTEG);
1262 		sprint(buf, "%d", winid);
1263 		putenv("winid", buf);
1264 
1265 		if(filename){
1266 			putenv("%", filename);
1267 			free(filename);
1268 		}
1269 		c->md = fsysmount(rdir, ndir, incl, nincl);
1270 		if(c->md == nil){
1271 			fprint(2, "child: can't mount /dev/cons: %r\n");
1272 			threadexits("mount");
1273 		}
1274 		close(0);
1275 		if(winid>0 && (pipechar=='|' || pipechar=='>')){
1276 			sprint(buf, "/mnt/acme/%d/rdsel", winid);
1277 			open(buf, OREAD);
1278 		}else
1279 			open("/dev/null", OREAD);
1280 		close(1);
1281 		if((winid>0 || iseditcmd) && (pipechar=='|' || pipechar=='<')){
1282 			if(iseditcmd){
1283 				if(winid > 0)
1284 					sprint(buf, "/mnt/acme/%d/editout", winid);
1285 				else
1286 					sprint(buf, "/mnt/acme/editout");
1287 			}else
1288 				sprint(buf, "/mnt/acme/%d/wrsel", winid);
1289 			open(buf, OWRITE);
1290 			close(2);
1291 			open("/dev/cons", OWRITE);
1292 		}else{
1293 			open("/dev/cons", OWRITE);
1294 			dup(1, 2);
1295 		}
1296 	}else{
1297 		rfork(RFFDG|RFNOTEG);
1298 		fsysclose();
1299 		close(0);
1300 		open("/dev/null", OREAD);
1301 		close(1);
1302 		open(acmeerrorfile, OWRITE);
1303 		dup(1, 2);
1304 	}
1305 
1306 	if(win)
1307 		winclose(win);
1308 
1309 	if(argaddr)
1310 		putenv("acmeaddr", argaddr);
1311 	if(strlen(t) > sizeof buf-10)	/* may need to print into stack */
1312 		goto Hard;
1313 	inarg = FALSE;
1314 	for(e=t; *e; e+=w){
1315 		w = chartorune(&r, e);
1316 		if(r==' ' || r=='\t')
1317 			continue;
1318 		if(r < ' ')
1319 			goto Hard;
1320 		if(utfrune("#;&|^$=`'{}()<>[]*?^~`", r))
1321 			goto Hard;
1322 		inarg = TRUE;
1323 	}
1324 	if(!inarg)
1325 		goto Fail;
1326 
1327 	ac = 0;
1328 	av = nil;
1329 	inarg = FALSE;
1330 	for(e=t; *e; e+=w){
1331 		w = chartorune(&r, e);
1332 		if(r==' ' || r=='\t'){
1333 			inarg = FALSE;
1334 			*e = 0;
1335 			continue;
1336 		}
1337 		if(!inarg){
1338 			inarg = TRUE;
1339 			av = realloc(av, (ac+1)*sizeof(char**));
1340 			av[ac++] = e;
1341 		}
1342 	}
1343 	av = realloc(av, (ac+2)*sizeof(char**));
1344 	av[ac++] = arg;
1345 	av[ac] = nil;
1346 	c->av = av;
1347 	procexec(cpid, av[0], av);
1348 	e = av[0];
1349 	if(e[0]=='/' || (e[0]=='.' && e[1]=='/'))
1350 		goto Fail;
1351 	if(cputype){
1352 		sprint(buf, "%s/%s", cputype, av[0]);
1353 		procexec(cpid, buf, av);
1354 	}
1355 	sprint(buf, "/bin/%s", av[0]);
1356 	procexec(cpid, buf, av);
1357 	goto Fail;
1358 
1359 Hard:
1360 
1361 	/*
1362 	 * ugly: set path = (. $cputype /bin)
1363 	 * should honor $path if unusual.
1364 	 */
1365 	if(cputype){
1366 		n = 0;
1367 		memmove(buf+n, ".", 2);
1368 		n += 2;
1369 		i = strlen(cputype)+1;
1370 		memmove(buf+n, cputype, i);
1371 		n += i;
1372 		memmove(buf+n, "/bin", 5);
1373 		n += 5;
1374 		fd = create("/env/path", OWRITE, 0666);
1375 		write(fd, buf, n);
1376 		close(fd);
1377 	}
1378 
1379 	if(arg){
1380 		news = emalloc(strlen(t) + 1 + 1 + strlen(arg) + 1 + 1);
1381 		if(news){
1382 			sprint(news, "%s '%s'", t, arg);	/* BUG: what if quote in arg? */
1383 			free(s);
1384 			t = news;
1385 			c->text = news;
1386 		}
1387 	}
1388 	procexecl(cpid, "/bin/rc", "rc", "-c", t, nil);
1389 
1390    Fail:
1391 	/* procexec hasn't happened, so send a zero */
1392 	sendul(cpid, 0);
1393 	threadexits(nil);
1394 }
1395 
1396 void
runwaittask(void * v)1397 runwaittask(void *v)
1398 {
1399 	Command *c;
1400 	Channel *cpid;
1401 	void **a;
1402 
1403 	threadsetname("runwaittask");
1404 	a = v;
1405 	c = a[0];
1406 	cpid = a[1];
1407 	free(a);
1408 	do
1409 		c->pid = recvul(cpid);
1410 	while(c->pid == ~0);
1411 	free(c->av);
1412 	if(c->pid != 0)	/* successful exec */
1413 		sendp(ccommand, c);
1414 	else{
1415 		if(c->iseditcmd)
1416 			sendul(cedit, 0);
1417 		free(c->name);
1418 		free(c->text);
1419 		free(c);
1420 	}
1421 	chanfree(cpid);
1422 }
1423 
1424 void
run(Window * win,char * s,Rune * rdir,int ndir,int newns,char * argaddr,char * xarg,int iseditcmd)1425 run(Window *win, char *s, Rune *rdir, int ndir, int newns, char *argaddr, char *xarg, int iseditcmd)
1426 {
1427 	void **arg;
1428 	Command *c;
1429 	Channel *cpid;
1430 
1431 	if(s == nil)
1432 		return;
1433 
1434 	arg = emalloc(10*sizeof(void*));
1435 	c = emalloc(sizeof *c);
1436 	cpid = chancreate(sizeof(ulong), 0);
1437 	arg[0] = win;
1438 	arg[1] = s;
1439 	arg[2] = rdir;
1440 	arg[3] = (void*)ndir;
1441 	arg[4] = (void*)newns;
1442 	arg[5] = argaddr;
1443 	arg[6] = xarg;
1444 	arg[7] = c;
1445 	arg[8] = cpid;
1446 	arg[9] = (void*)iseditcmd;
1447 	proccreate(runproc, arg, STACK);
1448 	/* mustn't block here because must be ready to answer mount() call in run() */
1449 	arg = emalloc(2*sizeof(void*));
1450 	arg[0] = c;
1451 	arg[1] = cpid;
1452 	threadcreate(runwaittask, arg, STACK);
1453 }
1454