1 b3994ec5 2003-12-11 devnull #include <u.h>
  2 b3994ec5 2003-12-11 devnull #include <libc.h>
  3 b3994ec5 2003-12-11 devnull #include <draw.h>
  4 b3994ec5 2003-12-11 devnull #include <thread.h>
  5 b3994ec5 2003-12-11 devnull #include <cursor.h>
  6 b3994ec5 2003-12-11 devnull #include <mouse.h>
  7 b3994ec5 2003-12-11 devnull #include <keyboard.h>
  8 b3994ec5 2003-12-11 devnull #include <frame.h>
  9 b3994ec5 2003-12-11 devnull #include <fcall.h>
 10 b3994ec5 2003-12-11 devnull #include <plumb.h>
 11 b3994ec5 2003-12-11 devnull #include "dat.h"
 12 b3994ec5 2003-12-11 devnull #include "fns.h"
 13 b3994ec5 2003-12-11 devnull 
 14 b3994ec5 2003-12-11 devnull static	int	sfd;
 15 b3994ec5 2003-12-11 devnull 
 16 b3994ec5 2003-12-11 devnull enum
 17 b3994ec5 2003-12-11 devnull {
 18 b3994ec5 2003-12-11 devnull 	Nhash	= 16,
 19 b3994ec5 2003-12-11 devnull 	DEBUG	= 0
 20 b3994ec5 2003-12-11 devnull };
 21 b3994ec5 2003-12-11 devnull 
 22 b3994ec5 2003-12-11 devnull static	Fid	*fids[Nhash];
 23 b3994ec5 2003-12-11 devnull 
 24 b3994ec5 2003-12-11 devnull Fid	*newfid(int);
 25 b3994ec5 2003-12-11 devnull 
 26 b3994ec5 2003-12-11 devnull static	Xfid*	fsysflush(Xfid*, Fid*);
 27 b3994ec5 2003-12-11 devnull static	Xfid*	fsysauth(Xfid*, Fid*);
 28 b3994ec5 2003-12-11 devnull static	Xfid*	fsysversion(Xfid*, Fid*);
 29 b3994ec5 2003-12-11 devnull static	Xfid*	fsysattach(Xfid*, Fid*);
 30 b3994ec5 2003-12-11 devnull static	Xfid*	fsyswalk(Xfid*, Fid*);
 31 b3994ec5 2003-12-11 devnull static	Xfid*	fsysopen(Xfid*, Fid*);
 32 b3994ec5 2003-12-11 devnull static	Xfid*	fsyscreate(Xfid*, Fid*);
 33 b3994ec5 2003-12-11 devnull static	Xfid*	fsysread(Xfid*, Fid*);
 34 b3994ec5 2003-12-11 devnull static	Xfid*	fsyswrite(Xfid*, Fid*);
 35 b3994ec5 2003-12-11 devnull static	Xfid*	fsysclunk(Xfid*, Fid*);
 36 b3994ec5 2003-12-11 devnull static	Xfid*	fsysremove(Xfid*, Fid*);
 37 b3994ec5 2003-12-11 devnull static	Xfid*	fsysstat(Xfid*, Fid*);
 38 b3994ec5 2003-12-11 devnull static	Xfid*	fsyswstat(Xfid*, Fid*);
 39 b3994ec5 2003-12-11 devnull 
 40 8ad51794 2004-03-25 devnull Xfid* 	(*fcall[Tmax])(Xfid*, Fid*);
 41 8ad51794 2004-03-25 devnull 
 42 8ad51794 2004-03-25 devnull static void
 43 8ad51794 2004-03-25 devnull initfcall(void)
 44 b3994ec5 2003-12-11 devnull {
 45 8ad51794 2004-03-25 devnull 	fcall[Tflush]	= fsysflush;
 46 8ad51794 2004-03-25 devnull 	fcall[Tversion]	= fsysversion;
 47 8ad51794 2004-03-25 devnull 	fcall[Tauth]	= fsysauth;
 48 8ad51794 2004-03-25 devnull 	fcall[Tattach]	= fsysattach;
 49 8ad51794 2004-03-25 devnull 	fcall[Twalk]	= fsyswalk;
 50 8ad51794 2004-03-25 devnull 	fcall[Topen]	= fsysopen;
 51 8ad51794 2004-03-25 devnull 	fcall[Tcreate]	= fsyscreate;
 52 8ad51794 2004-03-25 devnull 	fcall[Tread]	= fsysread;
 53 8ad51794 2004-03-25 devnull 	fcall[Twrite]	= fsyswrite;
 54 8ad51794 2004-03-25 devnull 	fcall[Tclunk]	= fsysclunk;
 55 8ad51794 2004-03-25 devnull 	fcall[Tremove]= fsysremove;
 56 8ad51794 2004-03-25 devnull 	fcall[Tstat]	= fsysstat;
 57 8ad51794 2004-03-25 devnull 	fcall[Twstat]	= fsyswstat;
 58 8ad51794 2004-03-25 devnull }
 59 b3994ec5 2003-12-11 devnull 
 60 b3994ec5 2003-12-11 devnull char Eperm[] = "permission denied";
 61 b3994ec5 2003-12-11 devnull char Eexist[] = "file does not exist";
 62 b3994ec5 2003-12-11 devnull char Enotdir[] = "not a directory";
 63 b3994ec5 2003-12-11 devnull 
 64 b3994ec5 2003-12-11 devnull Dirtab dirtab[]=
 65 b3994ec5 2003-12-11 devnull {
 66 b3994ec5 2003-12-11 devnull 	{ ".",			QTDIR,	Qdir,		0500|DMDIR },
 67 b3994ec5 2003-12-11 devnull 	{ "acme",		QTDIR,	Qacme,	0500|DMDIR },
 68 b3994ec5 2003-12-11 devnull 	{ "cons",		QTFILE,	Qcons,	0600 },
 69 b3994ec5 2003-12-11 devnull 	{ "consctl",	QTFILE,	Qconsctl,	0000 },
 70 b3994ec5 2003-12-11 devnull 	{ "draw",		QTDIR,	Qdraw,	0000|DMDIR },	/* to suppress graphics progs started in acme */
 71 b3994ec5 2003-12-11 devnull 	{ "editout",	QTFILE,	Qeditout,	0200 },
 72 b3994ec5 2003-12-11 devnull 	{ "index",		QTFILE,	Qindex,	0400 },
 73 b3994ec5 2003-12-11 devnull 	{ "label",		QTFILE,	Qlabel,	0600 },
 74 b3994ec5 2003-12-11 devnull 	{ "new",		QTDIR,	Qnew,	0500|DMDIR },
 75 b3994ec5 2003-12-11 devnull 	{ nil, }
 76 b3994ec5 2003-12-11 devnull };
 77 b3994ec5 2003-12-11 devnull 
 78 b3994ec5 2003-12-11 devnull Dirtab dirtabw[]=
 79 b3994ec5 2003-12-11 devnull {
 80 b3994ec5 2003-12-11 devnull 	{ ".",			QTDIR,		Qdir,			0500|DMDIR },
 81 b3994ec5 2003-12-11 devnull 	{ "addr",		QTFILE,		QWaddr,		0600 },
 82 b3994ec5 2003-12-11 devnull 	{ "body",		QTAPPEND,	QWbody,		0600|DMAPPEND },
 83 b3994ec5 2003-12-11 devnull 	{ "ctl",		QTFILE,		QWctl,		0600 },
 84 b3994ec5 2003-12-11 devnull 	{ "data",		QTFILE,		QWdata,		0600 },
 85 b3994ec5 2003-12-11 devnull 	{ "editout",	QTFILE,		QWeditout,	0200 },
 86 b3994ec5 2003-12-11 devnull 	{ "event",		QTFILE,		QWevent,		0600 },
 87 b3994ec5 2003-12-11 devnull 	{ "rdsel",		QTFILE,		QWrdsel,		0400 },
 88 b3994ec5 2003-12-11 devnull 	{ "wrsel",		QTFILE,		QWwrsel,		0200 },
 89 b3994ec5 2003-12-11 devnull 	{ "tag",		QTAPPEND,	QWtag,		0600|DMAPPEND },
 90 012a8a02 2004-10-22 devnull 	{ "xdata",		QTFILE,		QWxdata,		0600 },
 91 b3994ec5 2003-12-11 devnull 	{ nil, }
 92 b3994ec5 2003-12-11 devnull };
 93 b3994ec5 2003-12-11 devnull 
 94 b3994ec5 2003-12-11 devnull typedef struct Mnt Mnt;
 95 b3994ec5 2003-12-11 devnull struct Mnt
 96 b3994ec5 2003-12-11 devnull {
 97 b3994ec5 2003-12-11 devnull 	QLock	lk;
 98 b3994ec5 2003-12-11 devnull 	int		id;
 99 b3994ec5 2003-12-11 devnull 	Mntdir	*md;
100 b3994ec5 2003-12-11 devnull };
101 b3994ec5 2003-12-11 devnull 
102 b3994ec5 2003-12-11 devnull Mnt	mnt;
103 b3994ec5 2003-12-11 devnull 
104 b3994ec5 2003-12-11 devnull Xfid*	respond(Xfid*, Fcall*, char*);
105 b3994ec5 2003-12-11 devnull int		dostat(int, Dirtab*, uchar*, int, uint);
106 b3994ec5 2003-12-11 devnull uint	getclock(void);
107 b3994ec5 2003-12-11 devnull 
108 b3994ec5 2003-12-11 devnull char	*user = "Wile E. Coyote";
109 b3994ec5 2003-12-11 devnull static int closing = 0;
110 b3994ec5 2003-12-11 devnull int	messagesize = Maxblock+IOHDRSZ;	/* good start */
111 b3994ec5 2003-12-11 devnull 
112 b3994ec5 2003-12-11 devnull void	fsysproc(void *);
113 b3994ec5 2003-12-11 devnull 
114 b3994ec5 2003-12-11 devnull void
115 b3994ec5 2003-12-11 devnull fsysinit(void)
116 b3994ec5 2003-12-11 devnull {
117 b3994ec5 2003-12-11 devnull 	int p[2];
118 5a8e63b2 2004-02-29 devnull 	char *u;
119 b3994ec5 2003-12-11 devnull 
120 8ad51794 2004-03-25 devnull 	initfcall();
121 b3994ec5 2003-12-11 devnull 	if(pipe(p) < 0)
122 b3994ec5 2003-12-11 devnull 		error("can't create pipe");
123 b3994ec5 2003-12-11 devnull 	if(post9pservice(p[0], "acme") < 0)
124 b3994ec5 2003-12-11 devnull 		error("can't post service");
125 b3994ec5 2003-12-11 devnull 	sfd = p[1];
126 b3994ec5 2003-12-11 devnull 	fmtinstall('F', fcallfmt);
127 b3994ec5 2003-12-11 devnull 	if((u = getuser()) != nil)
128 b3994ec5 2003-12-11 devnull 		user = estrdup(u);
129 334cb1e9 2004-12-27 devnull 	proccreate(fsysproc, nil, STACK);
130 b3994ec5 2003-12-11 devnull }
131 b3994ec5 2003-12-11 devnull 
132 b3994ec5 2003-12-11 devnull void
133 b3994ec5 2003-12-11 devnull fsysproc(void *v)
134 b3994ec5 2003-12-11 devnull {
135 b3994ec5 2003-12-11 devnull 	int n;
136 b3994ec5 2003-12-11 devnull 	Xfid *x;
137 b3994ec5 2003-12-11 devnull 	Fid *f;
138 b3994ec5 2003-12-11 devnull 	Fcall t;
139 b3994ec5 2003-12-11 devnull 	uchar *buf;
140 b3994ec5 2003-12-11 devnull 
141 b3994ec5 2003-12-11 devnull 	USED(v);
142 b3994ec5 2003-12-11 devnull 	x = nil;
143 b3994ec5 2003-12-11 devnull 	for(;;){
144 b3994ec5 2003-12-11 devnull 		buf = emalloc(messagesize+UTFmax);	/* overflow for appending partial rune in xfidwrite */
145 334cb1e9 2004-12-27 devnull 		n = read9pmsg(sfd, buf, messagesize);
146 b3994ec5 2003-12-11 devnull 		if(n <= 0){
147 b3994ec5 2003-12-11 devnull 			if(closing)
148 b3994ec5 2003-12-11 devnull 				break;
149 b3994ec5 2003-12-11 devnull 			error("i/o error on server channel");
150 b3994ec5 2003-12-11 devnull 		}
151 b3994ec5 2003-12-11 devnull 		if(x == nil){
152 b3994ec5 2003-12-11 devnull 			sendp(cxfidalloc, nil);
153 b3994ec5 2003-12-11 devnull 			x = recvp(cxfidalloc);
154 b3994ec5 2003-12-11 devnull 		}
155 b3994ec5 2003-12-11 devnull 		x->buf = buf;
156 b3994ec5 2003-12-11 devnull 		if(convM2S(buf, n, &x->fcall) != n)
157 b3994ec5 2003-12-11 devnull 			error("convert error in convM2S");
158 b3994ec5 2003-12-11 devnull 		if(DEBUG)
159 b3994ec5 2003-12-11 devnull 			fprint(2, "%F\n", &x->fcall);
160 a8763864 2004-07-09 devnull 		if(fcall[x->fcall.type] == 0)
161 b3994ec5 2003-12-11 devnull 			x = respond(x, &t, "bad fcall type");
162 b3994ec5 2003-12-11 devnull 		else{
163 b3994ec5 2003-12-11 devnull 			if(x->fcall.type==Tversion || x->fcall.type==Tauth)
164 b3994ec5 2003-12-11 devnull 				f = nil;
165 b3994ec5 2003-12-11 devnull 			else
166 b3994ec5 2003-12-11 devnull 				f = newfid(x->fcall.fid);
167 b3994ec5 2003-12-11 devnull 			x->f = f;
168 b3994ec5 2003-12-11 devnull 			x  = (*fcall[x->fcall.type])(x, f);
169 b3994ec5 2003-12-11 devnull 		}
170 b3994ec5 2003-12-11 devnull 	}
171 b3994ec5 2003-12-11 devnull }
172 b3994ec5 2003-12-11 devnull 
173 b3994ec5 2003-12-11 devnull Mntdir*
174 b3994ec5 2003-12-11 devnull fsysaddid(Rune *dir, int ndir, Rune **incl, int nincl)
175 b3994ec5 2003-12-11 devnull {
176 b3994ec5 2003-12-11 devnull 	Mntdir *m;
177 b3994ec5 2003-12-11 devnull 	int id;
178 b3994ec5 2003-12-11 devnull 
179 b3994ec5 2003-12-11 devnull 	qlock(&mnt.lk);
180 b3994ec5 2003-12-11 devnull 	id = ++mnt.id;
181 b3994ec5 2003-12-11 devnull 	m = emalloc(sizeof *m);
182 b3994ec5 2003-12-11 devnull 	m->id = id;
183 b3994ec5 2003-12-11 devnull 	m->dir =  dir;
184 b3994ec5 2003-12-11 devnull 	m->ref = 1;	/* one for Command, one will be incremented in attach */
185 b3994ec5 2003-12-11 devnull 	m->ndir = ndir;
186 b3994ec5 2003-12-11 devnull 	m->next = mnt.md;
187 b3994ec5 2003-12-11 devnull 	m->incl = incl;
188 b3994ec5 2003-12-11 devnull 	m->nincl = nincl;
189 b3994ec5 2003-12-11 devnull 	mnt.md = m;
190 b3994ec5 2003-12-11 devnull 	qunlock(&mnt.lk);
191 b3994ec5 2003-12-11 devnull 	return m;
192 b3994ec5 2003-12-11 devnull }
193 b3994ec5 2003-12-11 devnull 
194 b3994ec5 2003-12-11 devnull void
195 8ad51794 2004-03-25 devnull fsysincid(Mntdir *m)
196 8ad51794 2004-03-25 devnull {
197 8ad51794 2004-03-25 devnull 	qlock(&mnt.lk);
198 8ad51794 2004-03-25 devnull 	m->ref++;
199 8ad51794 2004-03-25 devnull 	qunlock(&mnt.lk);
200 8ad51794 2004-03-25 devnull }
201 8ad51794 2004-03-25 devnull 
202 8ad51794 2004-03-25 devnull void
203 b3994ec5 2003-12-11 devnull fsysdelid(Mntdir *idm)
204 b3994ec5 2003-12-11 devnull {
205 b3994ec5 2003-12-11 devnull 	Mntdir *m, *prev;
206 b3994ec5 2003-12-11 devnull 	int i;
207 b3994ec5 2003-12-11 devnull 	char buf[64];
208 b3994ec5 2003-12-11 devnull 
209 b3994ec5 2003-12-11 devnull 	if(idm == nil)
210 b3994ec5 2003-12-11 devnull 		return;
211 b3994ec5 2003-12-11 devnull 	qlock(&mnt.lk);
212 b3994ec5 2003-12-11 devnull 	if(--idm->ref > 0){
213 b3994ec5 2003-12-11 devnull 		qunlock(&mnt.lk);
214 b3994ec5 2003-12-11 devnull 		return;
215 b3994ec5 2003-12-11 devnull 	}
216 b3994ec5 2003-12-11 devnull 	prev = nil;
217 b3994ec5 2003-12-11 devnull 	for(m=mnt.md; m; m=m->next){
218 b3994ec5 2003-12-11 devnull 		if(m == idm){
219 b3994ec5 2003-12-11 devnull 			if(prev)
220 b3994ec5 2003-12-11 devnull 				prev->next = m->next;
221 b3994ec5 2003-12-11 devnull 			else
222 b3994ec5 2003-12-11 devnull 				mnt.md = m->next;
223 b3994ec5 2003-12-11 devnull 			for(i=0; i<m->nincl; i++)
224 b3994ec5 2003-12-11 devnull 				free(m->incl[i]);
225 b3994ec5 2003-12-11 devnull 			free(m->incl);
226 b3994ec5 2003-12-11 devnull 			free(m->dir);
227 b3994ec5 2003-12-11 devnull 			free(m);
228 b3994ec5 2003-12-11 devnull 			qunlock(&mnt.lk);
229 b3994ec5 2003-12-11 devnull 			return;
230 b3994ec5 2003-12-11 devnull 		}
231 b3994ec5 2003-12-11 devnull 		prev = m;
232 b3994ec5 2003-12-11 devnull 	}
233 b3994ec5 2003-12-11 devnull 	qunlock(&mnt.lk);
234 b3994ec5 2003-12-11 devnull 	sprint(buf, "fsysdelid: can't find id %d\n", idm->id);
235 b3994ec5 2003-12-11 devnull 	sendp(cerr, estrdup(buf));
236 b3994ec5 2003-12-11 devnull }
237 b3994ec5 2003-12-11 devnull 
238 b3994ec5 2003-12-11 devnull /*
239 b3994ec5 2003-12-11 devnull  * Called only in exec.c:/^run(), from a different FD group
240 b3994ec5 2003-12-11 devnull  */
241 b3994ec5 2003-12-11 devnull Mntdir*
242 b3994ec5 2003-12-11 devnull fsysmount(Rune *dir, int ndir, Rune **incl, int nincl)
243 b3994ec5 2003-12-11 devnull {
244 b3994ec5 2003-12-11 devnull 	return fsysaddid(dir, ndir, incl, nincl);
245 b3994ec5 2003-12-11 devnull }
246 b3994ec5 2003-12-11 devnull 
247 b3994ec5 2003-12-11 devnull void
248 b3994ec5 2003-12-11 devnull fsysclose(void)
249 b3994ec5 2003-12-11 devnull {
250 b3994ec5 2003-12-11 devnull 	closing = 1;
251 b3994ec5 2003-12-11 devnull 	close(sfd);
252 b3994ec5 2003-12-11 devnull }
253 b3994ec5 2003-12-11 devnull 
254 b3994ec5 2003-12-11 devnull Xfid*
255 b3994ec5 2003-12-11 devnull respond(Xfid *x, Fcall *t, char *err)
256 b3994ec5 2003-12-11 devnull {
257 b3994ec5 2003-12-11 devnull 	int n;
258 b3994ec5 2003-12-11 devnull 
259 b3994ec5 2003-12-11 devnull 	if(err){
260 b3994ec5 2003-12-11 devnull 		t->type = Rerror;
261 b3994ec5 2003-12-11 devnull 		t->ename = err;
262 b3994ec5 2003-12-11 devnull 	}else
263 b3994ec5 2003-12-11 devnull 		t->type = x->fcall.type+1;
264 b3994ec5 2003-12-11 devnull 	t->fid = x->fcall.fid;
265 b3994ec5 2003-12-11 devnull 	t->tag = x->fcall.tag;
266 b3994ec5 2003-12-11 devnull 	if(x->buf == nil)
267 b3994ec5 2003-12-11 devnull 		x->buf = emalloc(messagesize);
268 b3994ec5 2003-12-11 devnull 	n = convS2M(t, x->buf, messagesize);
269 b3994ec5 2003-12-11 devnull 	if(n <= 0)
270 5a8e63b2 2004-02-29 devnull {
271 5a8e63b2 2004-02-29 devnull fprint(2, "convert error (n=%d, msgsize %d): have %F\n", n, messagesize, &x->fcall);
272 5a8e63b2 2004-02-29 devnull fprint(2, "\tresponse: %F\n", t);
273 b3994ec5 2003-12-11 devnull 		error("convert error in convS2M");
274 5a8e63b2 2004-02-29 devnull }
275 b3994ec5 2003-12-11 devnull 	if(write(sfd, x->buf, n) != n)
276 b3994ec5 2003-12-11 devnull 		error("write error in respond");
277 b3994ec5 2003-12-11 devnull 	free(x->buf);
278 b3994ec5 2003-12-11 devnull 	x->buf = nil;
279 b3994ec5 2003-12-11 devnull 	if(DEBUG)
280 b3994ec5 2003-12-11 devnull 		fprint(2, "r: %F\n", t);
281 b3994ec5 2003-12-11 devnull 	return x;
282 b3994ec5 2003-12-11 devnull }
283 b3994ec5 2003-12-11 devnull 
284 b3994ec5 2003-12-11 devnull static
285 b3994ec5 2003-12-11 devnull Xfid*
286 b3994ec5 2003-12-11 devnull fsysversion(Xfid *x, Fid *f)
287 b3994ec5 2003-12-11 devnull {
288 b3994ec5 2003-12-11 devnull 	Fcall t;
289 b3994ec5 2003-12-11 devnull 
290 b3994ec5 2003-12-11 devnull 	USED(f);
291 b3994ec5 2003-12-11 devnull 	if(x->fcall.msize < 256)
292 b3994ec5 2003-12-11 devnull 		return respond(x, &t, "version: message size too small");
293 b3994ec5 2003-12-11 devnull 	messagesize = x->fcall.msize;
294 b3994ec5 2003-12-11 devnull 	t.msize = messagesize;
295 b3994ec5 2003-12-11 devnull 	if(strncmp(x->fcall.version, "9P2000", 6) != 0)
296 b3994ec5 2003-12-11 devnull 		return respond(x, &t, "unrecognized 9P version");
297 b3994ec5 2003-12-11 devnull 	t.version = "9P2000";
298 b3994ec5 2003-12-11 devnull 	return respond(x, &t, nil);
299 b3994ec5 2003-12-11 devnull }
300 b3994ec5 2003-12-11 devnull 
301 b3994ec5 2003-12-11 devnull static
302 b3994ec5 2003-12-11 devnull Xfid*
303 b3994ec5 2003-12-11 devnull fsysauth(Xfid *x, Fid *f)
304 b3994ec5 2003-12-11 devnull {
305 b3994ec5 2003-12-11 devnull 	USED(f);
306 b3994ec5 2003-12-11 devnull 	return respond(x, nil, "acme: authentication not required");
307 b3994ec5 2003-12-11 devnull }
308 b3994ec5 2003-12-11 devnull 
309 b3994ec5 2003-12-11 devnull static
310 b3994ec5 2003-12-11 devnull Xfid*
311 b3994ec5 2003-12-11 devnull fsysflush(Xfid *x, Fid *f)
312 b3994ec5 2003-12-11 devnull {
313 b3994ec5 2003-12-11 devnull 	USED(f);
314 be22ae2d 2004-03-26 devnull 	sendp(x->c, (void*)xfidflush);
315 b3994ec5 2003-12-11 devnull 	return nil;
316 b3994ec5 2003-12-11 devnull }
317 b3994ec5 2003-12-11 devnull 
318 b3994ec5 2003-12-11 devnull static
319 b3994ec5 2003-12-11 devnull Xfid*
320 b3994ec5 2003-12-11 devnull fsysattach(Xfid *x, Fid *f)
321 b3994ec5 2003-12-11 devnull {
322 b3994ec5 2003-12-11 devnull 	Fcall t;
323 b3994ec5 2003-12-11 devnull 	int id;
324 b3994ec5 2003-12-11 devnull 	Mntdir *m;
325 49588d5d 2003-12-17 devnull 	char buf[128];
326 b3994ec5 2003-12-11 devnull 
327 b3994ec5 2003-12-11 devnull 	if(strcmp(x->fcall.uname, user) != 0)
328 b3994ec5 2003-12-11 devnull 		return respond(x, &t, Eperm);
329 b3994ec5 2003-12-11 devnull 	f->busy = TRUE;
330 b3994ec5 2003-12-11 devnull 	f->open = FALSE;
331 b3994ec5 2003-12-11 devnull 	f->qid.path = Qdir;
332 b3994ec5 2003-12-11 devnull 	f->qid.type = QTDIR;
333 b3994ec5 2003-12-11 devnull 	f->qid.vers = 0;
334 b3994ec5 2003-12-11 devnull 	f->dir = dirtab;
335 b3994ec5 2003-12-11 devnull 	f->nrpart = 0;
336 b3994ec5 2003-12-11 devnull 	f->w = nil;
337 b3994ec5 2003-12-11 devnull 	t.qid = f->qid;
338 b3994ec5 2003-12-11 devnull 	f->mntdir = nil;
339 b3994ec5 2003-12-11 devnull 	id = atoi(x->fcall.aname);
340 b3994ec5 2003-12-11 devnull 	qlock(&mnt.lk);
341 b3994ec5 2003-12-11 devnull 	for(m=mnt.md; m; m=m->next)
342 b3994ec5 2003-12-11 devnull 		if(m->id == id){
343 b3994ec5 2003-12-11 devnull 			f->mntdir = m;
344 b3994ec5 2003-12-11 devnull 			m->ref++;
345 b3994ec5 2003-12-11 devnull 			break;
346 b3994ec5 2003-12-11 devnull 		}
347 8ad51794 2004-03-25 devnull 	if(m == nil && x->fcall.aname[0]){
348 49588d5d 2003-12-17 devnull 		snprint(buf, sizeof buf, "unknown id '%s' in attach", x->fcall.aname);
349 49588d5d 2003-12-17 devnull 		sendp(cerr, estrdup(buf));
350 49588d5d 2003-12-17 devnull 	}
351 b3994ec5 2003-12-11 devnull 	qunlock(&mnt.lk);
352 b3994ec5 2003-12-11 devnull 	return respond(x, &t, nil);
353 b3994ec5 2003-12-11 devnull }
354 b3994ec5 2003-12-11 devnull 
355 b3994ec5 2003-12-11 devnull static
356 b3994ec5 2003-12-11 devnull Xfid*
357 b3994ec5 2003-12-11 devnull fsyswalk(Xfid *x, Fid *f)
358 b3994ec5 2003-12-11 devnull {
359 b3994ec5 2003-12-11 devnull 	Fcall t;
360 b3994ec5 2003-12-11 devnull 	int c, i, j, id;
361 b3994ec5 2003-12-11 devnull 	Qid q;
362 b3994ec5 2003-12-11 devnull 	uchar type;
363 b3994ec5 2003-12-11 devnull 	ulong path;
364 b3994ec5 2003-12-11 devnull 	Fid *nf;
365 b3994ec5 2003-12-11 devnull 	Dirtab *d, *dir;
366 b3994ec5 2003-12-11 devnull 	Window *w;
367 b3994ec5 2003-12-11 devnull 	char *err;
368 b3994ec5 2003-12-11 devnull 
369 b3994ec5 2003-12-11 devnull 	nf = nil;
370 b3994ec5 2003-12-11 devnull 	w = nil;
371 b3994ec5 2003-12-11 devnull 	if(f->open)
372 b3994ec5 2003-12-11 devnull 		return respond(x, &t, "walk of open file");
373 b3994ec5 2003-12-11 devnull 	if(x->fcall.fid != x->fcall.newfid){
374 b3994ec5 2003-12-11 devnull 		nf = newfid(x->fcall.newfid);
375 b3994ec5 2003-12-11 devnull 		if(nf->busy)
376 b3994ec5 2003-12-11 devnull 			return respond(x, &t, "newfid already in use");
377 b3994ec5 2003-12-11 devnull 		nf->busy = TRUE;
378 b3994ec5 2003-12-11 devnull 		nf->open = FALSE;
379 b3994ec5 2003-12-11 devnull 		nf->mntdir = f->mntdir;
380 b3994ec5 2003-12-11 devnull 		if(f->mntdir)
381 b3994ec5 2003-12-11 devnull 			f->mntdir->ref++;
382 b3994ec5 2003-12-11 devnull 		nf->dir = f->dir;
383 b3994ec5 2003-12-11 devnull 		nf->qid = f->qid;
384 b3994ec5 2003-12-11 devnull 		nf->w = f->w;
385 b3994ec5 2003-12-11 devnull 		nf->nrpart = 0;	/* not open, so must be zero */
386 b3994ec5 2003-12-11 devnull 		if(nf->w)
387 b3994ec5 2003-12-11 devnull 			incref(&nf->w->ref);
388 b3994ec5 2003-12-11 devnull 		f = nf;	/* walk f */
389 b3994ec5 2003-12-11 devnull 	}
390 b3994ec5 2003-12-11 devnull 
391 b3994ec5 2003-12-11 devnull 	t.nwqid = 0;
392 b3994ec5 2003-12-11 devnull 	err = nil;
393 b3994ec5 2003-12-11 devnull 	dir = nil;
394 b3994ec5 2003-12-11 devnull 	id = WIN(f->qid);
395 b3994ec5 2003-12-11 devnull 	q = f->qid;
396 b3994ec5 2003-12-11 devnull 
397 b3994ec5 2003-12-11 devnull 	if(x->fcall.nwname > 0){
398 b3994ec5 2003-12-11 devnull 		for(i=0; i<x->fcall.nwname; i++){
399 b3994ec5 2003-12-11 devnull 			if((q.type & QTDIR) == 0){
400 b3994ec5 2003-12-11 devnull 				err = Enotdir;
401 b3994ec5 2003-12-11 devnull 				break;
402 b3994ec5 2003-12-11 devnull 			}
403 b3994ec5 2003-12-11 devnull 
404 b3994ec5 2003-12-11 devnull 			if(strcmp(x->fcall.wname[i], "..") == 0){
405 b3994ec5 2003-12-11 devnull 				type = QTDIR;
406 b3994ec5 2003-12-11 devnull 				path = Qdir;
407 b3994ec5 2003-12-11 devnull 				id = 0;
408 b3994ec5 2003-12-11 devnull 				if(w){
409 b3994ec5 2003-12-11 devnull 					winclose(w);
410 b3994ec5 2003-12-11 devnull 					w = nil;
411 b3994ec5 2003-12-11 devnull 				}
412 b3994ec5 2003-12-11 devnull     Accept:
413 b3994ec5 2003-12-11 devnull 				if(i == MAXWELEM){
414 b3994ec5 2003-12-11 devnull 					err = "name too long";
415 b3994ec5 2003-12-11 devnull 					break;
416 b3994ec5 2003-12-11 devnull 				}
417 b3994ec5 2003-12-11 devnull 				q.type = type;
418 b3994ec5 2003-12-11 devnull 				q.vers = 0;
419 b3994ec5 2003-12-11 devnull 				q.path = QID(id, path);
420 b3994ec5 2003-12-11 devnull 				t.wqid[t.nwqid++] = q;
421 b3994ec5 2003-12-11 devnull 				continue;
422 b3994ec5 2003-12-11 devnull 			}
423 b3994ec5 2003-12-11 devnull 
424 b3994ec5 2003-12-11 devnull 			/* is it a numeric name? */
425 b3994ec5 2003-12-11 devnull 			for(j=0; (c=x->fcall.wname[i][j]); j++)
426 b3994ec5 2003-12-11 devnull 				if(c<'0' || '9'<c)
427 b3994ec5 2003-12-11 devnull 					goto Regular;
428 b3994ec5 2003-12-11 devnull 			/* yes: it's a directory */
429 b3994ec5 2003-12-11 devnull 			if(w)	/* name has form 27/23; get out before losing w */
430 b3994ec5 2003-12-11 devnull 				break;
431 b3994ec5 2003-12-11 devnull 			id = atoi(x->fcall.wname[i]);
432 b3994ec5 2003-12-11 devnull 			qlock(&row.lk);
433 b3994ec5 2003-12-11 devnull 			w = lookid(id, FALSE);
434 b3994ec5 2003-12-11 devnull 			if(w == nil){
435 b3994ec5 2003-12-11 devnull 				qunlock(&row.lk);
436 b3994ec5 2003-12-11 devnull 				break;
437 b3994ec5 2003-12-11 devnull 			}
438 b3994ec5 2003-12-11 devnull 			incref(&w->ref);	/* we'll drop reference at end if there's an error */
439 b3994ec5 2003-12-11 devnull 			path = Qdir;
440 b3994ec5 2003-12-11 devnull 			type = QTDIR;
441 b3994ec5 2003-12-11 devnull 			qunlock(&row.lk);
442 b3994ec5 2003-12-11 devnull 			dir = dirtabw;
443 b3994ec5 2003-12-11 devnull 			goto Accept;
444 b3994ec5 2003-12-11 devnull 	
445 b3994ec5 2003-12-11 devnull     Regular:
446 b3994ec5 2003-12-11 devnull //			if(FILE(f->qid) == Qacme)	/* empty directory */
447 b3994ec5 2003-12-11 devnull //				break;
448 b3994ec5 2003-12-11 devnull 			if(strcmp(x->fcall.wname[i], "new") == 0){
449 b3994ec5 2003-12-11 devnull 				if(w)
450 b3994ec5 2003-12-11 devnull 					error("w set in walk to new");
451 b3994ec5 2003-12-11 devnull 				sendp(cnewwindow, nil);	/* signal newwindowthread */
452 b3994ec5 2003-12-11 devnull 				w = recvp(cnewwindow);	/* receive new window */
453 b3994ec5 2003-12-11 devnull 				incref(&w->ref);
454 b3994ec5 2003-12-11 devnull 				type = QTDIR;
455 b3994ec5 2003-12-11 devnull 				path = QID(w->id, Qdir);
456 b3994ec5 2003-12-11 devnull 				id = w->id;
457 b3994ec5 2003-12-11 devnull 				dir = dirtabw;
458 b3994ec5 2003-12-11 devnull 				goto Accept;
459 b3994ec5 2003-12-11 devnull 			}
460 b3994ec5 2003-12-11 devnull 
461 b3994ec5 2003-12-11 devnull 			if(id == 0)
462 b3994ec5 2003-12-11 devnull 				d = dirtab;
463 b3994ec5 2003-12-11 devnull 			else
464 b3994ec5 2003-12-11 devnull 				d = dirtabw;
465 b3994ec5 2003-12-11 devnull 			d++;	/* skip '.' */
466 b3994ec5 2003-12-11 devnull 			for(; d->name; d++)
467 b3994ec5 2003-12-11 devnull 				if(strcmp(x->fcall.wname[i], d->name) == 0){
468 b3994ec5 2003-12-11 devnull 					path = d->qid;
469 b3994ec5 2003-12-11 devnull 					type = d->type;
470 b3994ec5 2003-12-11 devnull 					dir = d;
471 b3994ec5 2003-12-11 devnull 					goto Accept;
472 b3994ec5 2003-12-11 devnull 				}
473 b3994ec5 2003-12-11 devnull 
474 b3994ec5 2003-12-11 devnull 			break;	/* file not found */
475 b3994ec5 2003-12-11 devnull 		}
476 b3994ec5 2003-12-11 devnull 
477 b3994ec5 2003-12-11 devnull 		if(i==0 && err == nil)
478 b3994ec5 2003-12-11 devnull 			err = Eexist;
479 b3994ec5 2003-12-11 devnull 	}
480 b3994ec5 2003-12-11 devnull 
481 b3994ec5 2003-12-11 devnull 	if(err!=nil || t.nwqid<x->fcall.nwname){
482 b3994ec5 2003-12-11 devnull 		if(nf){
483 b3994ec5 2003-12-11 devnull 			nf->busy = FALSE;
484 b3994ec5 2003-12-11 devnull 			fsysdelid(nf->mntdir);
485 b3994ec5 2003-12-11 devnull 		}
486 b3994ec5 2003-12-11 devnull 	}else if(t.nwqid  == x->fcall.nwname){
487 b3994ec5 2003-12-11 devnull 		if(w){
488 b3994ec5 2003-12-11 devnull 			f->w = w;
489 b3994ec5 2003-12-11 devnull 			w = nil;	/* don't drop the reference */
490 b3994ec5 2003-12-11 devnull 		}
491 b3994ec5 2003-12-11 devnull 		if(dir)
492 b3994ec5 2003-12-11 devnull 			f->dir = dir;
493 b3994ec5 2003-12-11 devnull 		f->qid = q;
494 b3994ec5 2003-12-11 devnull 	}
495 b3994ec5 2003-12-11 devnull 
496 b3994ec5 2003-12-11 devnull 	if(w != nil)
497 b3994ec5 2003-12-11 devnull 		winclose(w);
498 b3994ec5 2003-12-11 devnull 
499 b3994ec5 2003-12-11 devnull 	return respond(x, &t, err);
500 b3994ec5 2003-12-11 devnull }
501 b3994ec5 2003-12-11 devnull 
502 b3994ec5 2003-12-11 devnull static
503 b3994ec5 2003-12-11 devnull Xfid*
504 b3994ec5 2003-12-11 devnull fsysopen(Xfid *x, Fid *f)
505 b3994ec5 2003-12-11 devnull {
506 b3994ec5 2003-12-11 devnull 	Fcall t;
507 b3994ec5 2003-12-11 devnull 	int m;
508 b3994ec5 2003-12-11 devnull 
509 b3994ec5 2003-12-11 devnull 	/* can't truncate anything, so just disregard */
510 b3994ec5 2003-12-11 devnull 	x->fcall.mode &= ~(OTRUNC|OCEXEC);
511 b3994ec5 2003-12-11 devnull 	/* can't execute or remove anything */
512 b3994ec5 2003-12-11 devnull 	if(x->fcall.mode==OEXEC || (x->fcall.mode&ORCLOSE))
513 b3994ec5 2003-12-11 devnull 		goto Deny;
514 b3994ec5 2003-12-11 devnull 	switch(x->fcall.mode){
515 b3994ec5 2003-12-11 devnull 	default:
516 b3994ec5 2003-12-11 devnull 		goto Deny;
517 b3994ec5 2003-12-11 devnull 	case OREAD:
518 b3994ec5 2003-12-11 devnull 		m = 0400;
519 b3994ec5 2003-12-11 devnull 		break;
520 b3994ec5 2003-12-11 devnull 	case OWRITE:
521 b3994ec5 2003-12-11 devnull 		m = 0200;
522 b3994ec5 2003-12-11 devnull 		break;
523 b3994ec5 2003-12-11 devnull 	case ORDWR:
524 b3994ec5 2003-12-11 devnull 		m = 0600;
525 b3994ec5 2003-12-11 devnull 		break;
526 b3994ec5 2003-12-11 devnull 	}
527 b3994ec5 2003-12-11 devnull 	if(((f->dir->perm&~(DMDIR|DMAPPEND))&m) != m)
528 b3994ec5 2003-12-11 devnull 		goto Deny;
529 b3994ec5 2003-12-11 devnull 
530 be22ae2d 2004-03-26 devnull 	sendp(x->c, (void*)xfidopen);
531 b3994ec5 2003-12-11 devnull 	return nil;
532 b3994ec5 2003-12-11 devnull 
533 b3994ec5 2003-12-11 devnull     Deny:
534 b3994ec5 2003-12-11 devnull 	return respond(x, &t, Eperm);
535 b3994ec5 2003-12-11 devnull }
536 b3994ec5 2003-12-11 devnull 
537 b3994ec5 2003-12-11 devnull static
538 b3994ec5 2003-12-11 devnull Xfid*
539 b3994ec5 2003-12-11 devnull fsyscreate(Xfid *x, Fid *f)
540 b3994ec5 2003-12-11 devnull {
541 b3994ec5 2003-12-11 devnull 	Fcall t;
542 b3994ec5 2003-12-11 devnull 
543 b3994ec5 2003-12-11 devnull 	USED(f);
544 b3994ec5 2003-12-11 devnull 	return respond(x, &t, Eperm);
545 b3994ec5 2003-12-11 devnull }
546 b3994ec5 2003-12-11 devnull 
547 b3994ec5 2003-12-11 devnull static
548 b3994ec5 2003-12-11 devnull int
549 b3994ec5 2003-12-11 devnull idcmp(const void *a, const void *b)
550 b3994ec5 2003-12-11 devnull {
551 b3994ec5 2003-12-11 devnull 	return *(int*)a - *(int*)b;
552 b3994ec5 2003-12-11 devnull }
553 b3994ec5 2003-12-11 devnull 
554 b3994ec5 2003-12-11 devnull static
555 b3994ec5 2003-12-11 devnull Xfid*
556 b3994ec5 2003-12-11 devnull fsysread(Xfid *x, Fid *f)
557 b3994ec5 2003-12-11 devnull {
558 b3994ec5 2003-12-11 devnull 	Fcall t;
559 b3994ec5 2003-12-11 devnull 	uchar *b;
560 b3994ec5 2003-12-11 devnull 	int i, id, n, o, e, j, k, *ids, nids;
561 b3994ec5 2003-12-11 devnull 	Dirtab *d, dt;
562 b3994ec5 2003-12-11 devnull 	Column *c;
563 b3994ec5 2003-12-11 devnull 	uint clock, len;
564 b3994ec5 2003-12-11 devnull 	char buf[16];
565 b3994ec5 2003-12-11 devnull 
566 b3994ec5 2003-12-11 devnull 	if(f->qid.type & QTDIR){
567 b3994ec5 2003-12-11 devnull 		if(FILE(f->qid) == Qacme){	/* empty dir */
568 b3994ec5 2003-12-11 devnull 			t.data = nil;
569 b3994ec5 2003-12-11 devnull 			t.count = 0;
570 b3994ec5 2003-12-11 devnull 			respond(x, &t, nil);
571 b3994ec5 2003-12-11 devnull 			return x;
572 b3994ec5 2003-12-11 devnull 		}
573 b3994ec5 2003-12-11 devnull 		o = x->fcall.offset;
574 b3994ec5 2003-12-11 devnull 		e = x->fcall.offset+x->fcall.count;
575 b3994ec5 2003-12-11 devnull 		clock = getclock();
576 b3994ec5 2003-12-11 devnull 		b = emalloc(messagesize);
577 b3994ec5 2003-12-11 devnull 		id = WIN(f->qid);
578 b3994ec5 2003-12-11 devnull 		n = 0;
579 b3994ec5 2003-12-11 devnull 		if(id > 0)
580 b3994ec5 2003-12-11 devnull 			d = dirtabw;
581 b3994ec5 2003-12-11 devnull 		else
582 b3994ec5 2003-12-11 devnull 			d = dirtab;
583 b3994ec5 2003-12-11 devnull 		d++;	/* first entry is '.' */
584 b3994ec5 2003-12-11 devnull 		for(i=0; d->name!=nil && i<e; i+=len){
585 b3994ec5 2003-12-11 devnull 			len = dostat(WIN(x->f->qid), d, b+n, x->fcall.count-n, clock);
586 b3994ec5 2003-12-11 devnull 			if(len <= BIT16SZ)
587 b3994ec5 2003-12-11 devnull 				break;
588 b3994ec5 2003-12-11 devnull 			if(i >= o)
589 b3994ec5 2003-12-11 devnull 				n += len;
590 b3994ec5 2003-12-11 devnull 			d++;
591 b3994ec5 2003-12-11 devnull 		}
592 b3994ec5 2003-12-11 devnull 		if(id == 0){
593 b3994ec5 2003-12-11 devnull 			qlock(&row.lk);
594 b3994ec5 2003-12-11 devnull 			nids = 0;
595 b3994ec5 2003-12-11 devnull 			ids = nil;
596 b3994ec5 2003-12-11 devnull 			for(j=0; j<row.ncol; j++){
597 b3994ec5 2003-12-11 devnull 				c = row.col[j];
598 b3994ec5 2003-12-11 devnull 				for(k=0; k<c->nw; k++){
599 b3994ec5 2003-12-11 devnull 					ids = realloc(ids, (nids+1)*sizeof(int));
600 b3994ec5 2003-12-11 devnull 					ids[nids++] = c->w[k]->id;
601 b3994ec5 2003-12-11 devnull 				}
602 b3994ec5 2003-12-11 devnull 			}
603 b3994ec5 2003-12-11 devnull 			qunlock(&row.lk);
604 b3994ec5 2003-12-11 devnull 			qsort(ids, nids, sizeof ids[0], idcmp);
605 b3994ec5 2003-12-11 devnull 			j = 0;
606 b3994ec5 2003-12-11 devnull 			dt.name = buf;
607 b3994ec5 2003-12-11 devnull 			for(; j<nids && i<e; i+=len){
608 b3994ec5 2003-12-11 devnull 				k = ids[j];
609 b3994ec5 2003-12-11 devnull 				sprint(dt.name, "%d", k);
610 b3994ec5 2003-12-11 devnull 				dt.qid = QID(k, Qdir);
611 b3994ec5 2003-12-11 devnull 				dt.type = QTDIR;
612 b3994ec5 2003-12-11 devnull 				dt.perm = DMDIR|0700;
613 b3994ec5 2003-12-11 devnull 				len = dostat(k, &dt, b+n, x->fcall.count-n, clock);
614 b3994ec5 2003-12-11 devnull 				if(len == 0)
615 b3994ec5 2003-12-11 devnull 					break;
616 b3994ec5 2003-12-11 devnull 				if(i >= o)
617 b3994ec5 2003-12-11 devnull 					n += len;
618 b3994ec5 2003-12-11 devnull 				j++;
619 b3994ec5 2003-12-11 devnull 			}
620 b3994ec5 2003-12-11 devnull 			free(ids);
621 b3994ec5 2003-12-11 devnull 		}
622 b3994ec5 2003-12-11 devnull 		t.data = (char*)b;
623 b3994ec5 2003-12-11 devnull 		t.count = n;
624 b3994ec5 2003-12-11 devnull 		respond(x, &t, nil);
625 b3994ec5 2003-12-11 devnull 		free(b);
626 b3994ec5 2003-12-11 devnull 		return x;
627 b3994ec5 2003-12-11 devnull 	}
628 be22ae2d 2004-03-26 devnull 	sendp(x->c, (void*)xfidread);
629 b3994ec5 2003-12-11 devnull 	return nil;
630 b3994ec5 2003-12-11 devnull }
631 b3994ec5 2003-12-11 devnull 
632 b3994ec5 2003-12-11 devnull static
633 b3994ec5 2003-12-11 devnull Xfid*
634 b3994ec5 2003-12-11 devnull fsyswrite(Xfid *x, Fid *f)
635 b3994ec5 2003-12-11 devnull {
636 b3994ec5 2003-12-11 devnull 	USED(f);
637 be22ae2d 2004-03-26 devnull 	sendp(x->c, (void*)xfidwrite);
638 b3994ec5 2003-12-11 devnull 	return nil;
639 b3994ec5 2003-12-11 devnull }
640 b3994ec5 2003-12-11 devnull 
641 b3994ec5 2003-12-11 devnull static
642 b3994ec5 2003-12-11 devnull Xfid*
643 b3994ec5 2003-12-11 devnull fsysclunk(Xfid *x, Fid *f)
644 b3994ec5 2003-12-11 devnull {
645 b3994ec5 2003-12-11 devnull 	fsysdelid(f->mntdir);
646 be22ae2d 2004-03-26 devnull 	sendp(x->c, (void*)xfidclose);
647 b3994ec5 2003-12-11 devnull 	return nil;
648 b3994ec5 2003-12-11 devnull }
649 b3994ec5 2003-12-11 devnull 
650 b3994ec5 2003-12-11 devnull static
651 b3994ec5 2003-12-11 devnull Xfid*
652 b3994ec5 2003-12-11 devnull fsysremove(Xfid *x, Fid *f)
653 b3994ec5 2003-12-11 devnull {
654 b3994ec5 2003-12-11 devnull 	Fcall t;
655 b3994ec5 2003-12-11 devnull 
656 b3994ec5 2003-12-11 devnull 	USED(f);
657 b3994ec5 2003-12-11 devnull 	return respond(x, &t, Eperm);
658 b3994ec5 2003-12-11 devnull }
659 b3994ec5 2003-12-11 devnull 
660 b3994ec5 2003-12-11 devnull static
661 b3994ec5 2003-12-11 devnull Xfid*
662 b3994ec5 2003-12-11 devnull fsysstat(Xfid *x, Fid *f)
663 b3994ec5 2003-12-11 devnull {
664 b3994ec5 2003-12-11 devnull 	Fcall t;
665 b3994ec5 2003-12-11 devnull 
666 b3994ec5 2003-12-11 devnull 	t.stat = emalloc(messagesize-IOHDRSZ);
667 b3994ec5 2003-12-11 devnull 	t.nstat = dostat(WIN(x->f->qid), f->dir, t.stat, messagesize-IOHDRSZ, getclock());
668 b3994ec5 2003-12-11 devnull 	x = respond(x, &t, nil);
669 b3994ec5 2003-12-11 devnull 	free(t.stat);
670 b3994ec5 2003-12-11 devnull 	return x;
671 b3994ec5 2003-12-11 devnull }
672 b3994ec5 2003-12-11 devnull 
673 b3994ec5 2003-12-11 devnull static
674 b3994ec5 2003-12-11 devnull Xfid*
675 b3994ec5 2003-12-11 devnull fsyswstat(Xfid *x, Fid *f)
676 b3994ec5 2003-12-11 devnull {
677 b3994ec5 2003-12-11 devnull 	Fcall t;
678 b3994ec5 2003-12-11 devnull 
679 b3994ec5 2003-12-11 devnull 	USED(f);
680 b3994ec5 2003-12-11 devnull 	return respond(x, &t, Eperm);
681 b3994ec5 2003-12-11 devnull }
682 b3994ec5 2003-12-11 devnull 
683 b3994ec5 2003-12-11 devnull Fid*
684 b3994ec5 2003-12-11 devnull newfid(int fid)
685 b3994ec5 2003-12-11 devnull {
686 b3994ec5 2003-12-11 devnull 	Fid *f, *ff, **fh;
687 b3994ec5 2003-12-11 devnull 
688 b3994ec5 2003-12-11 devnull 	ff = nil;
689 b3994ec5 2003-12-11 devnull 	fh = &fids[fid&(Nhash-1)];
690 b3994ec5 2003-12-11 devnull 	for(f=*fh; f; f=f->next)
691 b3994ec5 2003-12-11 devnull 		if(f->fid == fid)
692 b3994ec5 2003-12-11 devnull 			return f;
693 b3994ec5 2003-12-11 devnull 		else if(ff==nil && f->busy==FALSE)
694 b3994ec5 2003-12-11 devnull 			ff = f;
695 b3994ec5 2003-12-11 devnull 	if(ff){
696 b3994ec5 2003-12-11 devnull 		ff->fid = fid;
697 b3994ec5 2003-12-11 devnull 		return ff;
698 b3994ec5 2003-12-11 devnull 	}
699 b3994ec5 2003-12-11 devnull 	f = emalloc(sizeof *f);
700 b3994ec5 2003-12-11 devnull 	f->fid = fid;
701 b3994ec5 2003-12-11 devnull 	f->next = *fh;
702 b3994ec5 2003-12-11 devnull 	*fh = f;
703 b3994ec5 2003-12-11 devnull 	return f;
704 b3994ec5 2003-12-11 devnull }
705 b3994ec5 2003-12-11 devnull 
706 b3994ec5 2003-12-11 devnull uint
707 b3994ec5 2003-12-11 devnull getclock(void)
708 b3994ec5 2003-12-11 devnull {
709 b3994ec5 2003-12-11 devnull /*
710 b3994ec5 2003-12-11 devnull 	char buf[32];
711 b3994ec5 2003-12-11 devnull 
712 b3994ec5 2003-12-11 devnull 	buf[0] = '\0';
713 b3994ec5 2003-12-11 devnull 	pread(clockfd, buf, sizeof buf, 0);
714 b3994ec5 2003-12-11 devnull 	return atoi(buf);
715 b3994ec5 2003-12-11 devnull */	
716 b3994ec5 2003-12-11 devnull 	return time(0);
717 b3994ec5 2003-12-11 devnull }
718 b3994ec5 2003-12-11 devnull 
719 b3994ec5 2003-12-11 devnull int
720 b3994ec5 2003-12-11 devnull dostat(int id, Dirtab *dir, uchar *buf, int nbuf, uint clock)
721 b3994ec5 2003-12-11 devnull {
722 b3994ec5 2003-12-11 devnull 	Dir d;
723 b3994ec5 2003-12-11 devnull 
724 b3994ec5 2003-12-11 devnull 	d.qid.path = QID(id, dir->qid);
725 b3994ec5 2003-12-11 devnull 	d.qid.vers = 0;
726 b3994ec5 2003-12-11 devnull 	d.qid.type = dir->type;
727 b3994ec5 2003-12-11 devnull 	d.mode = dir->perm;
728 b3994ec5 2003-12-11 devnull 	d.length = 0;	/* would be nice to do better */
729 b3994ec5 2003-12-11 devnull 	d.name = dir->name;
730 b3994ec5 2003-12-11 devnull 	d.uid = user;
731 b3994ec5 2003-12-11 devnull 	d.gid = user;
732 b3994ec5 2003-12-11 devnull 	d.muid = user;
733 b3994ec5 2003-12-11 devnull 	d.atime = clock;
734 b3994ec5 2003-12-11 devnull 	d.mtime = clock;
735 b3994ec5 2003-12-11 devnull 	return convD2M(&d, buf, nbuf);
736 b3994ec5 2003-12-11 devnull }