1 7763a61a 2003-11-23 devnull #include "stdinc.h"
  2 7763a61a 2003-11-23 devnull #include <auth.h>
  3 7763a61a 2003-11-23 devnull #include <fcall.h>
  4 a20a1468 2005-01-16 devnull #include <thread.h>
  5 7763a61a 2003-11-23 devnull #include "vac.h"
  6 7763a61a 2003-11-23 devnull 
  7 7763a61a 2003-11-23 devnull typedef struct Fid Fid;
  8 7763a61a 2003-11-23 devnull typedef struct DirBuf DirBuf;
  9 7763a61a 2003-11-23 devnull 
 10 7763a61a 2003-11-23 devnull enum
 11 7763a61a 2003-11-23 devnull {
 12 cbeb0b26 2006-04-01 devnull 	OPERM	= 0x3		/* mask of all permission types in open mode */
 13 7763a61a 2003-11-23 devnull };
 14 7763a61a 2003-11-23 devnull 
 15 7763a61a 2003-11-23 devnull enum
 16 7763a61a 2003-11-23 devnull {
 17 cbeb0b26 2006-04-01 devnull 	DirBufSize = 20
 18 7763a61a 2003-11-23 devnull };
 19 7763a61a 2003-11-23 devnull 
 20 7763a61a 2003-11-23 devnull struct Fid
 21 7763a61a 2003-11-23 devnull {
 22 7763a61a 2003-11-23 devnull 	short busy;
 23 7763a61a 2003-11-23 devnull 	short open;
 24 7763a61a 2003-11-23 devnull 	int fid;
 25 7763a61a 2003-11-23 devnull 	char *user;
 26 7763a61a 2003-11-23 devnull 	Qid qid;
 27 7763a61a 2003-11-23 devnull 	VacFile *file;
 28 7763a61a 2003-11-23 devnull 
 29 7763a61a 2003-11-23 devnull 	DirBuf *db;
 30 7763a61a 2003-11-23 devnull 
 31 7763a61a 2003-11-23 devnull 	Fid	*next;
 32 7763a61a 2003-11-23 devnull };
 33 7763a61a 2003-11-23 devnull 
 34 7763a61a 2003-11-23 devnull struct DirBuf
 35 7763a61a 2003-11-23 devnull {
 36 7763a61a 2003-11-23 devnull 	VacDirEnum *vde;
 37 7763a61a 2003-11-23 devnull 	VacDir buf[DirBufSize];
 38 7763a61a 2003-11-23 devnull 	int i, n;
 39 7763a61a 2003-11-23 devnull 	int eof;
 40 7763a61a 2003-11-23 devnull };
 41 7763a61a 2003-11-23 devnull 
 42 7763a61a 2003-11-23 devnull enum
 43 7763a61a 2003-11-23 devnull {
 44 7763a61a 2003-11-23 devnull 	Pexec =		1,
 45 7763a61a 2003-11-23 devnull 	Pwrite = 	2,
 46 7763a61a 2003-11-23 devnull 	Pread = 	4,
 47 7763a61a 2003-11-23 devnull 	Pother = 	1,
 48 7763a61a 2003-11-23 devnull 	Pgroup = 	8,
 49 cbeb0b26 2006-04-01 devnull 	Powner =	64
 50 7763a61a 2003-11-23 devnull };
 51 7763a61a 2003-11-23 devnull 
 52 7763a61a 2003-11-23 devnull Fid	*fids;
 53 7763a61a 2003-11-23 devnull uchar	*data;
 54 7763a61a 2003-11-23 devnull int	mfd[2];
 55 7763a61a 2003-11-23 devnull char	*user;
 56 7763a61a 2003-11-23 devnull uchar	mdata[8192+IOHDRSZ];
 57 7763a61a 2003-11-23 devnull int messagesize = sizeof mdata;
 58 7763a61a 2003-11-23 devnull Fcall	rhdr;
 59 7763a61a 2003-11-23 devnull Fcall	thdr;
 60 a20a1468 2005-01-16 devnull VacFs	*fs;
 61 a20a1468 2005-01-16 devnull VtConn  *conn;
 62 cbeb0b26 2006-04-01 devnull /* VtSession *session; */
 63 7763a61a 2003-11-23 devnull int	noperm;
 64 bbfdd7a6 2005-09-13 devnull int	dotu;
 65 7763a61a 2003-11-23 devnull 
 66 7763a61a 2003-11-23 devnull Fid *	newfid(int);
 67 7763a61a 2003-11-23 devnull void	error(char*);
 68 7763a61a 2003-11-23 devnull void	io(void);
 69 a331ac4c 2005-01-19 devnull void	vacshutdown(void);
 70 7763a61a 2003-11-23 devnull void	usage(void);
 71 7763a61a 2003-11-23 devnull int	perm(Fid*, int);
 72 7763a61a 2003-11-23 devnull int	permf(VacFile*, char*, int);
 73 7763a61a 2003-11-23 devnull ulong	getl(void *p);
 74 7763a61a 2003-11-23 devnull void	init(char*, char*, long, int);
 75 7763a61a 2003-11-23 devnull DirBuf	*dirBufAlloc(VacFile*);
 76 7763a61a 2003-11-23 devnull VacDir	*dirBufGet(DirBuf*);
 77 7763a61a 2003-11-23 devnull int	dirBufUnget(DirBuf*);
 78 7763a61a 2003-11-23 devnull void	dirBufFree(DirBuf*);
 79 7763a61a 2003-11-23 devnull int	vacdirread(Fid *f, char *p, long off, long cnt);
 80 bbfdd7a6 2005-09-13 devnull int	vdStat(VacFile *parent, VacDir *vd, uchar *p, int np);
 81 a20a1468 2005-01-16 devnull void 	srv(void* a);
 82 7763a61a 2003-11-23 devnull 
 83 a20a1468 2005-01-16 devnull 
 84 7763a61a 2003-11-23 devnull char	*rflush(Fid*), *rversion(Fid*),
 85 7763a61a 2003-11-23 devnull 	*rauth(Fid*), *rattach(Fid*), *rwalk(Fid*),
 86 7763a61a 2003-11-23 devnull 	*ropen(Fid*), *rcreate(Fid*),
 87 7763a61a 2003-11-23 devnull 	*rread(Fid*), *rwrite(Fid*), *rclunk(Fid*),
 88 7763a61a 2003-11-23 devnull 	*rremove(Fid*), *rstat(Fid*), *rwstat(Fid*);
 89 7763a61a 2003-11-23 devnull 
 90 9b3d503b 2005-01-19 devnull char 	*(*fcalls[Tmax])(Fid*);
 91 9b3d503b 2005-01-19 devnull 
 92 9b3d503b 2005-01-19 devnull void
 93 9b3d503b 2005-01-19 devnull initfcalls(void)
 94 9b3d503b 2005-01-19 devnull {
 95 9b3d503b 2005-01-19 devnull 	fcalls[Tflush]=	rflush;
 96 9b3d503b 2005-01-19 devnull 	fcalls[Tversion]=	rversion;
 97 9b3d503b 2005-01-19 devnull 	fcalls[Tattach]=	rattach;
 98 9b3d503b 2005-01-19 devnull 	fcalls[Tauth]=		rauth;
 99 9b3d503b 2005-01-19 devnull 	fcalls[Twalk]=		rwalk;
100 9b3d503b 2005-01-19 devnull 	fcalls[Topen]=		ropen;
101 9b3d503b 2005-01-19 devnull 	fcalls[Tcreate]=	rcreate;
102 9b3d503b 2005-01-19 devnull 	fcalls[Tread]=		rread;
103 9b3d503b 2005-01-19 devnull 	fcalls[Twrite]=	rwrite;
104 9b3d503b 2005-01-19 devnull 	fcalls[Tclunk]=	rclunk;
105 9b3d503b 2005-01-19 devnull 	fcalls[Tremove]=	rremove;
106 9b3d503b 2005-01-19 devnull 	fcalls[Tstat]=		rstat;
107 9b3d503b 2005-01-19 devnull 	fcalls[Twstat]=	rwstat;
108 edefa249 2005-03-15 devnull }
109 7763a61a 2003-11-23 devnull 
110 7763a61a 2003-11-23 devnull char	Eperm[] =	"permission denied";
111 7763a61a 2003-11-23 devnull char	Enotdir[] =	"not a directory";
112 7763a61a 2003-11-23 devnull char	Enotexist[] =	"file does not exist";
113 7763a61a 2003-11-23 devnull char	Einuse[] =	"file in use";
114 7763a61a 2003-11-23 devnull char	Eexist[] =	"file exists";
115 7763a61a 2003-11-23 devnull char	Enotowner[] =	"not owner";
116 7763a61a 2003-11-23 devnull char	Eisopen[] = 	"file already open for I/O";
117 7763a61a 2003-11-23 devnull char	Excl[] = 	"exclusive use file already open";
118 7763a61a 2003-11-23 devnull char	Ename[] = 	"illegal name";
119 7763a61a 2003-11-23 devnull char	Erdonly[] = 	"read only file system";
120 7763a61a 2003-11-23 devnull char	Eio[] = 	"i/o error";
121 7763a61a 2003-11-23 devnull char	Eempty[] = 	"directory is not empty";
122 7763a61a 2003-11-23 devnull char	Emode[] =	"illegal mode";
123 7763a61a 2003-11-23 devnull 
124 7763a61a 2003-11-23 devnull int dflag;
125 7763a61a 2003-11-23 devnull 
126 7763a61a 2003-11-23 devnull void
127 7763a61a 2003-11-23 devnull notifyf(void *a, char *s)
128 7763a61a 2003-11-23 devnull {
129 7763a61a 2003-11-23 devnull 	USED(a);
130 7763a61a 2003-11-23 devnull 	if(strncmp(s, "interrupt", 9) == 0)
131 7763a61a 2003-11-23 devnull 		noted(NCONT);
132 7763a61a 2003-11-23 devnull 	noted(NDFLT);
133 7763a61a 2003-11-23 devnull }
134 7763a61a 2003-11-23 devnull 
135 7763a61a 2003-11-23 devnull void
136 a20a1468 2005-01-16 devnull threadmain(int argc, char *argv[])
137 7763a61a 2003-11-23 devnull {
138 91124c1b 2005-01-16 devnull 	char *defsrv, *q;
139 91124c1b 2005-01-16 devnull 	int p[2], l;
140 7763a61a 2003-11-23 devnull 	int stdio = 0;
141 7763a61a 2003-11-23 devnull 	char *host = nil;
142 7763a61a 2003-11-23 devnull 	long ncache = 1000;
143 7763a61a 2003-11-23 devnull 	int readOnly = 1;
144 7763a61a 2003-11-23 devnull 
145 23fb2edb 2005-07-24 devnull 	fmtinstall('H', encodefmt);
146 23fb2edb 2005-07-24 devnull 	fmtinstall('V', vtscorefmt);
147 23fb2edb 2005-07-24 devnull 	fmtinstall('F', vtfcallfmt);
148 23fb2edb 2005-07-24 devnull 	
149 91124c1b 2005-01-16 devnull 	defsrv = nil;
150 7763a61a 2003-11-23 devnull 	ARGBEGIN{
151 7763a61a 2003-11-23 devnull 	case 'd':
152 7763a61a 2003-11-23 devnull 		fmtinstall('F', fcallfmt);
153 7763a61a 2003-11-23 devnull 		dflag = 1;
154 7763a61a 2003-11-23 devnull 		break;
155 7763a61a 2003-11-23 devnull 	case 'c':
156 32053cdf 2005-01-16 devnull 		ncache = atoi(EARGF(usage()));
157 7763a61a 2003-11-23 devnull 		break;
158 7763a61a 2003-11-23 devnull 	case 'i':
159 7763a61a 2003-11-23 devnull 		stdio = 1;
160 7763a61a 2003-11-23 devnull 		mfd[0] = 0;
161 7763a61a 2003-11-23 devnull 		mfd[1] = 1;
162 7763a61a 2003-11-23 devnull 		break;
163 7763a61a 2003-11-23 devnull 	case 'h':
164 32053cdf 2005-01-16 devnull 		host = EARGF(usage());
165 7763a61a 2003-11-23 devnull 		break;
166 7763a61a 2003-11-23 devnull 	case 's':
167 32053cdf 2005-01-16 devnull 		defsrv = EARGF(usage());
168 7763a61a 2003-11-23 devnull 		break;
169 7763a61a 2003-11-23 devnull 	case 'p':
170 7763a61a 2003-11-23 devnull 		noperm = 1;
171 7763a61a 2003-11-23 devnull 		break;
172 23fb2edb 2005-07-24 devnull 	case 'V':
173 23fb2edb 2005-07-24 devnull 		chattyventi = 1;
174 23fb2edb 2005-07-24 devnull 		break;
175 7763a61a 2003-11-23 devnull 	default:
176 7763a61a 2003-11-23 devnull 		usage();
177 7763a61a 2003-11-23 devnull 	}ARGEND
178 7763a61a 2003-11-23 devnull 
179 7763a61a 2003-11-23 devnull 	if(argc != 1)
180 7763a61a 2003-11-23 devnull 		usage();
181 7763a61a 2003-11-23 devnull 
182 9b3d503b 2005-01-19 devnull 	initfcalls();
183 7763a61a 2003-11-23 devnull 	init(argv[0], host, ncache, readOnly);
184 7763a61a 2003-11-23 devnull 
185 7763a61a 2003-11-23 devnull 	if(pipe(p) < 0)
186 7763a61a 2003-11-23 devnull 		sysfatal("pipe failed: %r");
187 7763a61a 2003-11-23 devnull 
188 a20a1468 2005-01-16 devnull 	mfd[0] = p[0];
189 a20a1468 2005-01-16 devnull 	mfd[1] = p[0];
190 a20a1468 2005-01-16 devnull 	proccreate(srv, 0, 32 * 1024);
191 a20a1468 2005-01-16 devnull 
192 91124c1b 2005-01-16 devnull 	if(defsrv == nil){
193 91124c1b 2005-01-16 devnull 		q = strrchr(argv[0], '/');
194 91124c1b 2005-01-16 devnull 		if(q)
195 91124c1b 2005-01-16 devnull 			q++;
196 91124c1b 2005-01-16 devnull 		else
197 91124c1b 2005-01-16 devnull 			q = argv[0];
198 91124c1b 2005-01-16 devnull 		defsrv = vtmalloc(6+strlen(q)+1);
199 91124c1b 2005-01-16 devnull 		strcpy(defsrv, "vacfs.");
200 91124c1b 2005-01-16 devnull 		strcat(defsrv, q);
201 91124c1b 2005-01-16 devnull 		l = strlen(defsrv);
202 91124c1b 2005-01-16 devnull 		if(strcmp(defsrv+l-4, ".vac") == 0)
203 91124c1b 2005-01-16 devnull 			defsrv[l-4] = 0;
204 91124c1b 2005-01-16 devnull 	}
205 91124c1b 2005-01-16 devnull 
206 91124c1b 2005-01-16 devnull 	if(post9pservice(p[1], defsrv) != 0) 
207 a20a1468 2005-01-16 devnull 		sysfatal("post9pservice");
208 a20a1468 2005-01-16 devnull 
209 a20a1468 2005-01-16 devnull 	threadexits(0);
210 7763a61a 2003-11-23 devnull }
211 7763a61a 2003-11-23 devnull 
212 a331ac4c 2005-01-19 devnull void
213 a331ac4c 2005-01-19 devnull srv(void *a)
214 a331ac4c 2005-01-19 devnull {
215 a20a1468 2005-01-16 devnull 	io();
216 a331ac4c 2005-01-19 devnull 	vacshutdown();
217 a20a1468 2005-01-16 devnull }
218 a20a1468 2005-01-16 devnull 
219 7763a61a 2003-11-23 devnull void
220 7763a61a 2003-11-23 devnull usage(void)
221 7763a61a 2003-11-23 devnull {
222 7763a61a 2003-11-23 devnull 	fprint(2, "usage: %s [-sd] [-h host] [-c ncache] [-m mountpoint] vacfile\n", argv0);
223 38c10d1a 2005-01-17 devnull 	threadexitsall("usage");
224 7763a61a 2003-11-23 devnull }
225 7763a61a 2003-11-23 devnull 
226 7763a61a 2003-11-23 devnull char*
227 7763a61a 2003-11-23 devnull rversion(Fid *unused)
228 7763a61a 2003-11-23 devnull {
229 7763a61a 2003-11-23 devnull 	Fid *f;
230 7763a61a 2003-11-23 devnull 
231 7763a61a 2003-11-23 devnull 	USED(unused);
232 7763a61a 2003-11-23 devnull 
233 7763a61a 2003-11-23 devnull 	for(f = fids; f; f = f->next)
234 7763a61a 2003-11-23 devnull 		if(f->busy)
235 7763a61a 2003-11-23 devnull 			rclunk(f);
236 7763a61a 2003-11-23 devnull 
237 7763a61a 2003-11-23 devnull 	if(rhdr.msize < 256)
238 a20a1468 2005-01-16 devnull 		return vtstrdup("version: message size too small");
239 7763a61a 2003-11-23 devnull 	messagesize = rhdr.msize;
240 7763a61a 2003-11-23 devnull 	if(messagesize > sizeof mdata)
241 7763a61a 2003-11-23 devnull 		messagesize = sizeof mdata;
242 7763a61a 2003-11-23 devnull 	thdr.msize = messagesize;
243 7763a61a 2003-11-23 devnull 	if(strncmp(rhdr.version, "9P2000", 6) != 0)
244 a20a1468 2005-01-16 devnull 		return vtstrdup("unrecognized 9P version");
245 7763a61a 2003-11-23 devnull 	thdr.version = "9P2000";
246 bbfdd7a6 2005-09-13 devnull 	if(strncmp(rhdr.version, "9P2000.u", 8) == 0){
247 bbfdd7a6 2005-09-13 devnull 		dotu = 1;
248 bbfdd7a6 2005-09-13 devnull 		thdr.version = "9P2000.u";
249 bbfdd7a6 2005-09-13 devnull 	}
250 7763a61a 2003-11-23 devnull 	return nil;
251 7763a61a 2003-11-23 devnull }
252 7763a61a 2003-11-23 devnull 
253 7763a61a 2003-11-23 devnull char*
254 7763a61a 2003-11-23 devnull rflush(Fid *f)
255 7763a61a 2003-11-23 devnull {
256 7763a61a 2003-11-23 devnull 	USED(f);
257 7763a61a 2003-11-23 devnull 	return 0;
258 7763a61a 2003-11-23 devnull }
259 7763a61a 2003-11-23 devnull 
260 7763a61a 2003-11-23 devnull char*
261 7763a61a 2003-11-23 devnull rauth(Fid *f)
262 7763a61a 2003-11-23 devnull {
263 7763a61a 2003-11-23 devnull 	USED(f);
264 a20a1468 2005-01-16 devnull 	return vtstrdup("vacfs: authentication not required");
265 7763a61a 2003-11-23 devnull }
266 7763a61a 2003-11-23 devnull 
267 7763a61a 2003-11-23 devnull char*
268 7763a61a 2003-11-23 devnull rattach(Fid *f)
269 7763a61a 2003-11-23 devnull {
270 7763a61a 2003-11-23 devnull 	/* no authentication for the momment */
271 7763a61a 2003-11-23 devnull 	VacFile *file;
272 a20a1468 2005-01-16 devnull 	char err[80];
273 7763a61a 2003-11-23 devnull 
274 a20a1468 2005-01-16 devnull 	file = vacfsgetroot(fs);
275 a20a1468 2005-01-16 devnull 	if(file == nil) {
276 a20a1468 2005-01-16 devnull 		rerrstr(err, sizeof err);
277 a20a1468 2005-01-16 devnull 		return vtstrdup(err);
278 a20a1468 2005-01-16 devnull 	}
279 a20a1468 2005-01-16 devnull 
280 7763a61a 2003-11-23 devnull 	f->busy = 1;
281 7763a61a 2003-11-23 devnull 	f->file = file;
282 9b3d503b 2005-01-19 devnull 	f->qid.path = vacfilegetid(f->file);
283 9b3d503b 2005-01-19 devnull 	f->qid.vers = 0;
284 9b3d503b 2005-01-19 devnull 	f->qid.type = QTDIR;
285 7763a61a 2003-11-23 devnull 	thdr.qid = f->qid;
286 7763a61a 2003-11-23 devnull 	if(rhdr.uname[0])
287 a20a1468 2005-01-16 devnull 		f->user = vtstrdup(rhdr.uname);
288 7763a61a 2003-11-23 devnull 	else
289 7763a61a 2003-11-23 devnull 		f->user = "none";
290 7763a61a 2003-11-23 devnull 	return 0;
291 7763a61a 2003-11-23 devnull }
292 7763a61a 2003-11-23 devnull 
293 7763a61a 2003-11-23 devnull VacFile*
294 7763a61a 2003-11-23 devnull _vfWalk(VacFile *file, char *name)
295 7763a61a 2003-11-23 devnull {
296 7763a61a 2003-11-23 devnull 	VacFile *n;
297 7763a61a 2003-11-23 devnull 
298 a20a1468 2005-01-16 devnull 	n = vacfilewalk(file, name);
299 7763a61a 2003-11-23 devnull 	if(n)
300 7763a61a 2003-11-23 devnull 		return n;
301 7763a61a 2003-11-23 devnull 	if(strcmp(name, "SLASH") == 0)
302 a20a1468 2005-01-16 devnull 		return vacfilewalk(file, "/");
303 7763a61a 2003-11-23 devnull 	return nil;
304 7763a61a 2003-11-23 devnull }
305 7763a61a 2003-11-23 devnull 
306 7763a61a 2003-11-23 devnull char*
307 7763a61a 2003-11-23 devnull rwalk(Fid *f)
308 7763a61a 2003-11-23 devnull {
309 7763a61a 2003-11-23 devnull 	VacFile *file, *nfile;
310 7763a61a 2003-11-23 devnull 	Fid *nf;
311 7763a61a 2003-11-23 devnull 	int nqid, nwname;
312 7763a61a 2003-11-23 devnull 	Qid qid;
313 a20a1468 2005-01-16 devnull 	char *err = nil;
314 7763a61a 2003-11-23 devnull 
315 7763a61a 2003-11-23 devnull 	if(f->busy == 0)
316 7763a61a 2003-11-23 devnull 		return Enotexist;
317 7763a61a 2003-11-23 devnull 	nf = nil;
318 7763a61a 2003-11-23 devnull 	if(rhdr.fid != rhdr.newfid){
319 7763a61a 2003-11-23 devnull 		if(f->open)
320 a20a1468 2005-01-16 devnull 			return vtstrdup(Eisopen);
321 7763a61a 2003-11-23 devnull 		if(f->busy == 0)
322 a20a1468 2005-01-16 devnull 			return vtstrdup(Enotexist);
323 7763a61a 2003-11-23 devnull 		nf = newfid(rhdr.newfid);
324 7763a61a 2003-11-23 devnull 		if(nf->busy)
325 a20a1468 2005-01-16 devnull 			return vtstrdup(Eisopen);
326 7763a61a 2003-11-23 devnull 		nf->busy = 1;
327 7763a61a 2003-11-23 devnull 		nf->open = 0;
328 7763a61a 2003-11-23 devnull 		nf->qid = f->qid;
329 a20a1468 2005-01-16 devnull 		nf->file = vacfileincref(f->file);
330 a20a1468 2005-01-16 devnull 		nf->user = vtstrdup(f->user);
331 7763a61a 2003-11-23 devnull 		f = nf;
332 7763a61a 2003-11-23 devnull 	}
333 7763a61a 2003-11-23 devnull 
334 7763a61a 2003-11-23 devnull 	nwname = rhdr.nwname;
335 7763a61a 2003-11-23 devnull 
336 7763a61a 2003-11-23 devnull 	/* easy case */
337 7763a61a 2003-11-23 devnull 	if(nwname == 0) {
338 7763a61a 2003-11-23 devnull 		thdr.nwqid = 0;
339 7763a61a 2003-11-23 devnull 		return 0;
340 7763a61a 2003-11-23 devnull 	}
341 7763a61a 2003-11-23 devnull 
342 7763a61a 2003-11-23 devnull 	file = f->file;
343 a20a1468 2005-01-16 devnull 	vacfileincref(file);
344 7763a61a 2003-11-23 devnull 	qid = f->qid;
345 7763a61a 2003-11-23 devnull 
346 7763a61a 2003-11-23 devnull 	for(nqid = 0; nqid < nwname; nqid++){
347 7763a61a 2003-11-23 devnull 		if((qid.type & QTDIR) == 0){
348 a20a1468 2005-01-16 devnull 			err = Enotdir;
349 7763a61a 2003-11-23 devnull 			break;
350 7763a61a 2003-11-23 devnull 		}
351 7763a61a 2003-11-23 devnull 		if(!permf(file, f->user, Pexec)) {
352 a20a1468 2005-01-16 devnull 			err = Eperm;
353 7763a61a 2003-11-23 devnull 			break;
354 7763a61a 2003-11-23 devnull 		}
355 7763a61a 2003-11-23 devnull 		nfile = _vfWalk(file, rhdr.wname[nqid]);
356 7763a61a 2003-11-23 devnull 		if(nfile == nil)
357 7763a61a 2003-11-23 devnull 			break;
358 a20a1468 2005-01-16 devnull 		vacfiledecref(file);
359 7763a61a 2003-11-23 devnull 		file = nfile;
360 7763a61a 2003-11-23 devnull 		qid.type = QTFILE;
361 a20a1468 2005-01-16 devnull 		if(vacfileisdir(file))
362 7763a61a 2003-11-23 devnull 			qid.type = QTDIR;
363 bbfdd7a6 2005-09-13 devnull 		if(vacfilegetmode(file)&ModeLink)
364 bbfdd7a6 2005-09-13 devnull 			qid.type = QTSYMLINK;
365 a20a1468 2005-01-16 devnull 		qid.vers = vacfilegetmcount(file);
366 a20a1468 2005-01-16 devnull 		qid.path = vacfilegetid(file);
367 7763a61a 2003-11-23 devnull 		thdr.wqid[nqid] = qid;
368 7763a61a 2003-11-23 devnull 	}
369 7763a61a 2003-11-23 devnull 
370 7763a61a 2003-11-23 devnull 	thdr.nwqid = nqid;
371 7763a61a 2003-11-23 devnull 
372 7763a61a 2003-11-23 devnull 	if(nqid == nwname){
373 7763a61a 2003-11-23 devnull 		/* success */
374 7763a61a 2003-11-23 devnull 		f->qid = thdr.wqid[nqid-1];
375 a20a1468 2005-01-16 devnull 		vacfiledecref(f->file);
376 7763a61a 2003-11-23 devnull 		f->file = file;
377 7763a61a 2003-11-23 devnull 		return 0;
378 7763a61a 2003-11-23 devnull 	}
379 7763a61a 2003-11-23 devnull 
380 a20a1468 2005-01-16 devnull 	vacfiledecref(file);
381 7763a61a 2003-11-23 devnull 	if(nf != nil)
382 7763a61a 2003-11-23 devnull 		rclunk(nf);
383 7763a61a 2003-11-23 devnull 
384 7763a61a 2003-11-23 devnull 	/* only error on the first element */
385 7763a61a 2003-11-23 devnull 	if(nqid == 0)
386 a20a1468 2005-01-16 devnull 		return vtstrdup(err);
387 7763a61a 2003-11-23 devnull 
388 7763a61a 2003-11-23 devnull 	return 0;
389 7763a61a 2003-11-23 devnull }
390 7763a61a 2003-11-23 devnull 
391 7763a61a 2003-11-23 devnull char *
392 7763a61a 2003-11-23 devnull ropen(Fid *f)
393 7763a61a 2003-11-23 devnull {
394 7763a61a 2003-11-23 devnull 	int mode, trunc;
395 7763a61a 2003-11-23 devnull 
396 7763a61a 2003-11-23 devnull 	if(f->open)
397 a20a1468 2005-01-16 devnull 		return vtstrdup(Eisopen);
398 7763a61a 2003-11-23 devnull 	if(!f->busy)
399 a20a1468 2005-01-16 devnull 		return vtstrdup(Enotexist);
400 a20a1468 2005-01-16 devnull 
401 7763a61a 2003-11-23 devnull 	mode = rhdr.mode;
402 7763a61a 2003-11-23 devnull 	thdr.iounit = messagesize - IOHDRSZ;
403 7763a61a 2003-11-23 devnull 	if(f->qid.type & QTDIR){
404 7763a61a 2003-11-23 devnull 		if(mode != OREAD)
405 a20a1468 2005-01-16 devnull 			return vtstrdup(Eperm);
406 7763a61a 2003-11-23 devnull 		if(!perm(f, Pread))
407 a20a1468 2005-01-16 devnull 			return vtstrdup(Eperm);
408 7763a61a 2003-11-23 devnull 		thdr.qid = f->qid;
409 7763a61a 2003-11-23 devnull 		f->db = nil;
410 7763a61a 2003-11-23 devnull 		f->open = 1;
411 7763a61a 2003-11-23 devnull 		return 0;
412 7763a61a 2003-11-23 devnull 	}
413 7763a61a 2003-11-23 devnull 	if(mode & ORCLOSE)
414 a20a1468 2005-01-16 devnull 		return vtstrdup(Erdonly);
415 7763a61a 2003-11-23 devnull 	trunc = mode & OTRUNC;
416 7763a61a 2003-11-23 devnull 	mode &= OPERM;
417 7763a61a 2003-11-23 devnull 	if(mode==OWRITE || mode==ORDWR || trunc)
418 7763a61a 2003-11-23 devnull 		if(!perm(f, Pwrite))
419 a20a1468 2005-01-16 devnull 			return vtstrdup(Eperm);
420 7763a61a 2003-11-23 devnull 	if(mode==OREAD || mode==ORDWR)
421 7763a61a 2003-11-23 devnull 		if(!perm(f, Pread))
422 a20a1468 2005-01-16 devnull 			return vtstrdup(Eperm);
423 7763a61a 2003-11-23 devnull 	if(mode==OEXEC)
424 7763a61a 2003-11-23 devnull 		if(!perm(f, Pexec))
425 a20a1468 2005-01-16 devnull 			return vtstrdup(Eperm);
426 7763a61a 2003-11-23 devnull 	thdr.qid = f->qid;
427 7763a61a 2003-11-23 devnull 	thdr.iounit = messagesize - IOHDRSZ;
428 7763a61a 2003-11-23 devnull 	f->open = 1;
429 7763a61a 2003-11-23 devnull 	return 0;
430 7763a61a 2003-11-23 devnull }
431 7763a61a 2003-11-23 devnull 
432 7763a61a 2003-11-23 devnull char*
433 7763a61a 2003-11-23 devnull rcreate(Fid* fid)
434 7763a61a 2003-11-23 devnull {
435 7763a61a 2003-11-23 devnull 	VacFile *vf;
436 7763a61a 2003-11-23 devnull 	ulong mode;
437 7763a61a 2003-11-23 devnull 
438 7763a61a 2003-11-23 devnull 	if(fid->open)
439 a20a1468 2005-01-16 devnull 		return vtstrdup(Eisopen);
440 7763a61a 2003-11-23 devnull 	if(!fid->busy)
441 a20a1468 2005-01-16 devnull 		return vtstrdup(Enotexist);
442 a20a1468 2005-01-16 devnull 	if(fs->mode & ModeSnapshot)
443 a20a1468 2005-01-16 devnull 		return vtstrdup(Erdonly);
444 7763a61a 2003-11-23 devnull 	vf = fid->file;
445 a20a1468 2005-01-16 devnull 	if(!vacfileisdir(vf))
446 a20a1468 2005-01-16 devnull 		return vtstrdup(Enotdir);
447 7763a61a 2003-11-23 devnull 	if(!permf(vf, fid->user, Pwrite))
448 a20a1468 2005-01-16 devnull 		return vtstrdup(Eperm);
449 7763a61a 2003-11-23 devnull 
450 7763a61a 2003-11-23 devnull 	mode = rhdr.perm & 0777;
451 7763a61a 2003-11-23 devnull 
452 7763a61a 2003-11-23 devnull 	if(rhdr.perm & DMDIR){
453 7763a61a 2003-11-23 devnull 		if((rhdr.mode & OTRUNC) || (rhdr.perm & DMAPPEND))
454 a20a1468 2005-01-16 devnull 			return vtstrdup(Emode);
455 7763a61a 2003-11-23 devnull 		switch(rhdr.mode & OPERM){
456 7763a61a 2003-11-23 devnull 		default:
457 a20a1468 2005-01-16 devnull 			return vtstrdup(Emode);
458 7763a61a 2003-11-23 devnull 		case OEXEC:
459 7763a61a 2003-11-23 devnull 		case OREAD:
460 7763a61a 2003-11-23 devnull 			break;
461 7763a61a 2003-11-23 devnull 		case OWRITE:
462 7763a61a 2003-11-23 devnull 		case ORDWR:
463 a20a1468 2005-01-16 devnull 			return vtstrdup(Eperm);
464 7763a61a 2003-11-23 devnull 		}
465 7763a61a 2003-11-23 devnull 		mode |= ModeDir;
466 7763a61a 2003-11-23 devnull 	}
467 a20a1468 2005-01-16 devnull 	vf = vacfilecreate(vf, rhdr.name, mode, "none");
468 a20a1468 2005-01-16 devnull 	if(vf == nil) {
469 a20a1468 2005-01-16 devnull 		char err[80];
470 a20a1468 2005-01-16 devnull 		rerrstr(err, sizeof err);
471 7763a61a 2003-11-23 devnull 
472 a20a1468 2005-01-16 devnull 		return vtstrdup(err);
473 a20a1468 2005-01-16 devnull 	}
474 a20a1468 2005-01-16 devnull 
475 a20a1468 2005-01-16 devnull 	vacfiledecref(fid->file);
476 a20a1468 2005-01-16 devnull 
477 7763a61a 2003-11-23 devnull 	fid->file = vf;
478 7763a61a 2003-11-23 devnull 	fid->qid.type = QTFILE;
479 a20a1468 2005-01-16 devnull 	if(vacfileisdir(vf))
480 7763a61a 2003-11-23 devnull 		fid->qid.type = QTDIR;
481 a20a1468 2005-01-16 devnull 	fid->qid.vers = vacfilegetmcount(vf);
482 a20a1468 2005-01-16 devnull 	fid->qid.path = vacfilegetid(vf);
483 7763a61a 2003-11-23 devnull 
484 7763a61a 2003-11-23 devnull 	thdr.qid = fid->qid;
485 7763a61a 2003-11-23 devnull 	thdr.iounit = messagesize - IOHDRSZ;
486 7763a61a 2003-11-23 devnull 
487 7763a61a 2003-11-23 devnull 	return 0;
488 7763a61a 2003-11-23 devnull }
489 7763a61a 2003-11-23 devnull 
490 7763a61a 2003-11-23 devnull char*
491 7763a61a 2003-11-23 devnull rread(Fid *f)
492 7763a61a 2003-11-23 devnull {
493 7763a61a 2003-11-23 devnull 	char *buf;
494 7763a61a 2003-11-23 devnull 	vlong off;
495 7763a61a 2003-11-23 devnull 	int cnt;
496 7763a61a 2003-11-23 devnull 	VacFile *vf;
497 a20a1468 2005-01-16 devnull 	char err[80];
498 7763a61a 2003-11-23 devnull 	int n;
499 7763a61a 2003-11-23 devnull 
500 7763a61a 2003-11-23 devnull 	if(!f->busy)
501 a20a1468 2005-01-16 devnull 		return vtstrdup(Enotexist);
502 7763a61a 2003-11-23 devnull 	vf = f->file;
503 7763a61a 2003-11-23 devnull 	thdr.count = 0;
504 7763a61a 2003-11-23 devnull 	off = rhdr.offset;
505 7763a61a 2003-11-23 devnull 	buf = thdr.data;
506 7763a61a 2003-11-23 devnull 	cnt = rhdr.count;
507 7763a61a 2003-11-23 devnull 	if(f->qid.type & QTDIR)
508 7763a61a 2003-11-23 devnull 		n = vacdirread(f, buf, off, cnt);
509 bbfdd7a6 2005-09-13 devnull 	else if(vacfilegetmode(f->file)&ModeDevice)
510 bbfdd7a6 2005-09-13 devnull 		return vtstrdup("device");
511 bbfdd7a6 2005-09-13 devnull 	else if(vacfilegetmode(f->file)&ModeLink)
512 bbfdd7a6 2005-09-13 devnull 		return vtstrdup("symbolic link");
513 bbfdd7a6 2005-09-13 devnull 	else if(vacfilegetmode(f->file)&ModeNamedPipe)
514 bbfdd7a6 2005-09-13 devnull 		return vtstrdup("named pipe");
515 7763a61a 2003-11-23 devnull 	else
516 a20a1468 2005-01-16 devnull 		n = vacfileread(vf, buf, cnt, off);
517 7763a61a 2003-11-23 devnull 	if(n < 0) {
518 a20a1468 2005-01-16 devnull 		rerrstr(err, sizeof err);
519 a20a1468 2005-01-16 devnull 		return vtstrdup(err);
520 7763a61a 2003-11-23 devnull 	}
521 7763a61a 2003-11-23 devnull 	thdr.count = n;
522 7763a61a 2003-11-23 devnull 	return 0;
523 7763a61a 2003-11-23 devnull }
524 7763a61a 2003-11-23 devnull 
525 7763a61a 2003-11-23 devnull char*
526 7763a61a 2003-11-23 devnull rwrite(Fid *f)
527 7763a61a 2003-11-23 devnull {
528 7763a61a 2003-11-23 devnull 	char *buf;
529 7763a61a 2003-11-23 devnull 	vlong off;
530 7763a61a 2003-11-23 devnull 	int cnt;
531 7763a61a 2003-11-23 devnull 	VacFile *vf;
532 7763a61a 2003-11-23 devnull 
533 7763a61a 2003-11-23 devnull 	if(!f->busy)
534 a20a1468 2005-01-16 devnull 		return vtstrdup(Enotexist);
535 7763a61a 2003-11-23 devnull 	vf = f->file;
536 7763a61a 2003-11-23 devnull 	thdr.count = 0;
537 7763a61a 2003-11-23 devnull 	off = rhdr.offset;
538 7763a61a 2003-11-23 devnull 	buf = rhdr.data;
539 7763a61a 2003-11-23 devnull 	cnt = rhdr.count;
540 7763a61a 2003-11-23 devnull 	if(f->qid.type & QTDIR)
541 7763a61a 2003-11-23 devnull 		return "file is a directory";
542 a20a1468 2005-01-16 devnull 	thdr.count = vacfilewrite(vf, buf, cnt, off, "none");
543 7763a61a 2003-11-23 devnull 	if(thdr.count < 0) {
544 a20a1468 2005-01-16 devnull 		char err[80];
545 a20a1468 2005-01-16 devnull 
546 a20a1468 2005-01-16 devnull 		rerrstr(err, sizeof err);
547 a20a1468 2005-01-16 devnull fprint(2, "write failed: %s\n", err);
548 a20a1468 2005-01-16 devnull 		return vtstrdup(err);
549 7763a61a 2003-11-23 devnull 	}
550 7763a61a 2003-11-23 devnull 	return 0;
551 7763a61a 2003-11-23 devnull }
552 7763a61a 2003-11-23 devnull 
553 7763a61a 2003-11-23 devnull char *
554 7763a61a 2003-11-23 devnull rclunk(Fid *f)
555 7763a61a 2003-11-23 devnull {
556 7763a61a 2003-11-23 devnull 	f->busy = 0;
557 7763a61a 2003-11-23 devnull 	f->open = 0;
558 a20a1468 2005-01-16 devnull 	vtfree(f->user);
559 7763a61a 2003-11-23 devnull 	f->user = nil;
560 9e2f1d9b 2005-11-21 devnull 	if(f->file)
561 9e2f1d9b 2005-11-21 devnull 		vacfiledecref(f->file);
562 7763a61a 2003-11-23 devnull 	f->file = nil;
563 7763a61a 2003-11-23 devnull 	dirBufFree(f->db);
564 7763a61a 2003-11-23 devnull 	f->db = nil;
565 7763a61a 2003-11-23 devnull 	return 0;
566 7763a61a 2003-11-23 devnull }
567 7763a61a 2003-11-23 devnull 
568 7763a61a 2003-11-23 devnull char *
569 7763a61a 2003-11-23 devnull rremove(Fid *f)
570 7763a61a 2003-11-23 devnull {
571 7763a61a 2003-11-23 devnull 	VacFile *vf, *vfp;
572 a20a1468 2005-01-16 devnull 	char errbuf[80];
573 7763a61a 2003-11-23 devnull 	char *err = nil;
574 7763a61a 2003-11-23 devnull 
575 7763a61a 2003-11-23 devnull 	if(!f->busy)
576 a20a1468 2005-01-16 devnull 		return vtstrdup(Enotexist);
577 7763a61a 2003-11-23 devnull 	vf = f->file;
578 a20a1468 2005-01-16 devnull 	vfp = vacfilegetparent(vf);
579 7763a61a 2003-11-23 devnull 
580 7763a61a 2003-11-23 devnull 	if(!permf(vfp, f->user, Pwrite)) {
581 7763a61a 2003-11-23 devnull 		err = Eperm;
582 7763a61a 2003-11-23 devnull 		goto Exit;
583 7763a61a 2003-11-23 devnull 	}
584 7763a61a 2003-11-23 devnull 
585 a20a1468 2005-01-16 devnull 	if(!vacfileremove(vf, "none")) {
586 a20a1468 2005-01-16 devnull 		rerrstr(errbuf, sizeof errbuf);
587 a20a1468 2005-01-16 devnull print("vfRemove failed: %s\n", errbuf);
588 a20a1468 2005-01-16 devnull 
589 a20a1468 2005-01-16 devnull 		err = errbuf;
590 7763a61a 2003-11-23 devnull 	}
591 7763a61a 2003-11-23 devnull 
592 7763a61a 2003-11-23 devnull Exit:
593 a20a1468 2005-01-16 devnull 	vacfiledecref(vfp);
594 7763a61a 2003-11-23 devnull 	rclunk(f);
595 a20a1468 2005-01-16 devnull 	return vtstrdup(err);
596 7763a61a 2003-11-23 devnull }
597 7763a61a 2003-11-23 devnull 
598 7763a61a 2003-11-23 devnull char *
599 7763a61a 2003-11-23 devnull rstat(Fid *f)
600 7763a61a 2003-11-23 devnull {
601 7763a61a 2003-11-23 devnull 	VacDir dir;
602 7763a61a 2003-11-23 devnull 	static uchar statbuf[1024];
603 bbfdd7a6 2005-09-13 devnull 	VacFile *parent;
604 bbfdd7a6 2005-09-13 devnull 	
605 7763a61a 2003-11-23 devnull 	if(!f->busy)
606 a20a1468 2005-01-16 devnull 		return vtstrdup(Enotexist);
607 bbfdd7a6 2005-09-13 devnull 	parent = vacfilegetparent(f->file);
608 a20a1468 2005-01-16 devnull 	vacfilegetdir(f->file, &dir);
609 7763a61a 2003-11-23 devnull 	thdr.stat = statbuf;
610 bbfdd7a6 2005-09-13 devnull 	thdr.nstat = vdStat(parent, &dir, thdr.stat, sizeof statbuf);
611 a20a1468 2005-01-16 devnull 	vdcleanup(&dir);
612 bbfdd7a6 2005-09-13 devnull 	vacfiledecref(parent);
613 7763a61a 2003-11-23 devnull 	return 0;
614 7763a61a 2003-11-23 devnull }
615 7763a61a 2003-11-23 devnull 
616 7763a61a 2003-11-23 devnull char *
617 7763a61a 2003-11-23 devnull rwstat(Fid *f)
618 7763a61a 2003-11-23 devnull {
619 7763a61a 2003-11-23 devnull 	if(!f->busy)
620 a20a1468 2005-01-16 devnull 		return vtstrdup(Enotexist);
621 a20a1468 2005-01-16 devnull 	return vtstrdup(Erdonly);
622 7763a61a 2003-11-23 devnull }
623 7763a61a 2003-11-23 devnull 
624 7763a61a 2003-11-23 devnull int
625 bbfdd7a6 2005-09-13 devnull vdStat(VacFile *parent, VacDir *vd, uchar *p, int np)
626 7763a61a 2003-11-23 devnull {
627 bbfdd7a6 2005-09-13 devnull 	char *ext;
628 bbfdd7a6 2005-09-13 devnull 	int n, ret;
629 bbfdd7a6 2005-09-13 devnull 	uvlong size;
630 7763a61a 2003-11-23 devnull 	Dir dir;
631 bbfdd7a6 2005-09-13 devnull 	VacFile *vf;
632 7763a61a 2003-11-23 devnull 
633 7763a61a 2003-11-23 devnull 	memset(&dir, 0, sizeof(dir));
634 bbfdd7a6 2005-09-13 devnull 	ext = nil;
635 7763a61a 2003-11-23 devnull 
636 7763a61a 2003-11-23 devnull 	/*
637 7763a61a 2003-11-23 devnull 	 * Where do path and version come from
638 7763a61a 2003-11-23 devnull 	 */
639 7763a61a 2003-11-23 devnull 	dir.qid.path = vd->qid;
640 7763a61a 2003-11-23 devnull 	dir.qid.vers = vd->mcount;
641 7763a61a 2003-11-23 devnull 	dir.mode = vd->mode & 0777;
642 7763a61a 2003-11-23 devnull 	if(vd->mode & ModeAppend){
643 7763a61a 2003-11-23 devnull 		dir.qid.type |= QTAPPEND;
644 7763a61a 2003-11-23 devnull 		dir.mode |= DMAPPEND;
645 7763a61a 2003-11-23 devnull 	}
646 7763a61a 2003-11-23 devnull 	if(vd->mode & ModeExclusive){
647 7763a61a 2003-11-23 devnull 		dir.qid.type |= QTEXCL;
648 7763a61a 2003-11-23 devnull 		dir.mode |= DMEXCL;
649 7763a61a 2003-11-23 devnull 	}
650 7763a61a 2003-11-23 devnull 	if(vd->mode & ModeDir){
651 7763a61a 2003-11-23 devnull 		dir.qid.type |= QTDIR;
652 7763a61a 2003-11-23 devnull 		dir.mode |= DMDIR;
653 7763a61a 2003-11-23 devnull 	}
654 bbfdd7a6 2005-09-13 devnull 	
655 bbfdd7a6 2005-09-13 devnull 	if(vd->mode & (ModeLink|ModeDevice|ModeNamedPipe)){
656 bbfdd7a6 2005-09-13 devnull 		vf = vacfilewalk(parent, vd->elem);
657 bbfdd7a6 2005-09-13 devnull 		if(vf == nil)
658 bbfdd7a6 2005-09-13 devnull 			return 0;
659 bbfdd7a6 2005-09-13 devnull 		vacfilegetsize(vf, &size);
660 bbfdd7a6 2005-09-13 devnull 		ext = malloc(size+1);
661 bbfdd7a6 2005-09-13 devnull 		if(ext == nil)
662 bbfdd7a6 2005-09-13 devnull 			return 0;
663 bbfdd7a6 2005-09-13 devnull 		n = vacfileread(vf, ext, size, 0);
664 bbfdd7a6 2005-09-13 devnull 		ext[size] = 0;
665 bbfdd7a6 2005-09-13 devnull 		vacfiledecref(vf);
666 bbfdd7a6 2005-09-13 devnull 		if(vd->mode & ModeLink){
667 bbfdd7a6 2005-09-13 devnull 			dir.qid.type |= QTSYMLINK;
668 bbfdd7a6 2005-09-13 devnull 			dir.mode |= DMSYMLINK;
669 bbfdd7a6 2005-09-13 devnull 		}
670 bbfdd7a6 2005-09-13 devnull 		if(vd->mode & ModeDevice)
671 bbfdd7a6 2005-09-13 devnull 			dir.mode |= DMDEVICE;
672 bbfdd7a6 2005-09-13 devnull 		if(vd->mode & ModeNamedPipe)
673 bbfdd7a6 2005-09-13 devnull 			dir.mode |= DMNAMEDPIPE;
674 bbfdd7a6 2005-09-13 devnull 	}
675 bbfdd7a6 2005-09-13 devnull 	
676 7763a61a 2003-11-23 devnull 	dir.atime = vd->atime;
677 7763a61a 2003-11-23 devnull 	dir.mtime = vd->mtime;
678 7763a61a 2003-11-23 devnull 	dir.length = vd->size;
679 7763a61a 2003-11-23 devnull 
680 7763a61a 2003-11-23 devnull 	dir.name = vd->elem;
681 7763a61a 2003-11-23 devnull 	dir.uid = vd->uid;
682 7763a61a 2003-11-23 devnull 	dir.gid = vd->gid;
683 7763a61a 2003-11-23 devnull 	dir.muid = vd->mid;
684 bbfdd7a6 2005-09-13 devnull 	dir.ext = ext;
685 7763a61a 2003-11-23 devnull 
686 bbfdd7a6 2005-09-13 devnull 	ret = convD2Mu(&dir, p, np, dotu);
687 bbfdd7a6 2005-09-13 devnull 	free(ext);
688 bbfdd7a6 2005-09-13 devnull 	return ret;
689 7763a61a 2003-11-23 devnull }
690 7763a61a 2003-11-23 devnull 
691 7763a61a 2003-11-23 devnull DirBuf*
692 7763a61a 2003-11-23 devnull dirBufAlloc(VacFile *vf)
693 7763a61a 2003-11-23 devnull {
694 7763a61a 2003-11-23 devnull 	DirBuf *db;
695 7763a61a 2003-11-23 devnull 
696 a20a1468 2005-01-16 devnull 	db = vtmallocz(sizeof(DirBuf));
697 a20a1468 2005-01-16 devnull 	db->vde = vdeopen(vf);
698 7763a61a 2003-11-23 devnull 	return db;
699 7763a61a 2003-11-23 devnull }
700 7763a61a 2003-11-23 devnull 
701 7763a61a 2003-11-23 devnull VacDir *
702 7763a61a 2003-11-23 devnull dirBufGet(DirBuf *db)
703 7763a61a 2003-11-23 devnull {
704 7763a61a 2003-11-23 devnull 	VacDir *vd;
705 7763a61a 2003-11-23 devnull 	int n;
706 7763a61a 2003-11-23 devnull 
707 7763a61a 2003-11-23 devnull 	if(db->eof)
708 7763a61a 2003-11-23 devnull 		return nil;
709 7763a61a 2003-11-23 devnull 
710 7763a61a 2003-11-23 devnull 	if(db->i >= db->n) {
711 a20a1468 2005-01-16 devnull 		n = vderead(db->vde, db->buf);
712 7763a61a 2003-11-23 devnull 		if(n < 0)
713 7763a61a 2003-11-23 devnull 			return nil;
714 7763a61a 2003-11-23 devnull 		db->i = 0;
715 7763a61a 2003-11-23 devnull 		db->n = n;
716 7763a61a 2003-11-23 devnull 		if(n == 0) {
717 7763a61a 2003-11-23 devnull 			db->eof = 1;
718 7763a61a 2003-11-23 devnull 			return nil;
719 7763a61a 2003-11-23 devnull 		}
720 7763a61a 2003-11-23 devnull 	}
721 7763a61a 2003-11-23 devnull 
722 7763a61a 2003-11-23 devnull 	vd = db->buf + db->i;
723 7763a61a 2003-11-23 devnull 	db->i++;
724 7763a61a 2003-11-23 devnull 
725 7763a61a 2003-11-23 devnull 	return vd;
726 7763a61a 2003-11-23 devnull }
727 7763a61a 2003-11-23 devnull 
728 7763a61a 2003-11-23 devnull int
729 7763a61a 2003-11-23 devnull dirBufUnget(DirBuf *db)
730 7763a61a 2003-11-23 devnull {
731 7763a61a 2003-11-23 devnull 	assert(db->i > 0);
732 7763a61a 2003-11-23 devnull 	db->i--;
733 7763a61a 2003-11-23 devnull 	return 1;
734 7763a61a 2003-11-23 devnull }
735 7763a61a 2003-11-23 devnull 
736 7763a61a 2003-11-23 devnull void
737 7763a61a 2003-11-23 devnull dirBufFree(DirBuf *db)
738 7763a61a 2003-11-23 devnull {
739 7763a61a 2003-11-23 devnull 	int i;
740 7763a61a 2003-11-23 devnull 
741 7763a61a 2003-11-23 devnull 	if(db == nil)
742 7763a61a 2003-11-23 devnull 		return;
743 7763a61a 2003-11-23 devnull 
744 7763a61a 2003-11-23 devnull 	for(i=db->i; i<db->n; i++)
745 a20a1468 2005-01-16 devnull 		vdcleanup(db->buf + i);
746 a20a1468 2005-01-16 devnull 	vdeclose(db->vde);
747 a20a1468 2005-01-16 devnull 	vtfree(db);
748 7763a61a 2003-11-23 devnull }
749 7763a61a 2003-11-23 devnull 
750 7763a61a 2003-11-23 devnull int
751 7763a61a 2003-11-23 devnull vacdirread(Fid *f, char *p, long off, long cnt)
752 7763a61a 2003-11-23 devnull {
753 7763a61a 2003-11-23 devnull 	int n, nb;
754 7763a61a 2003-11-23 devnull 	VacDir *vd;
755 7763a61a 2003-11-23 devnull 
756 7763a61a 2003-11-23 devnull 	/*
757 7763a61a 2003-11-23 devnull 	 * special case of rewinding a directory
758 7763a61a 2003-11-23 devnull 	 * otherwise ignore the offset
759 7763a61a 2003-11-23 devnull 	 */
760 7763a61a 2003-11-23 devnull 	if(off == 0 && f->db) {
761 7763a61a 2003-11-23 devnull 		dirBufFree(f->db);
762 7763a61a 2003-11-23 devnull 		f->db = nil;
763 7763a61a 2003-11-23 devnull 	}
764 7763a61a 2003-11-23 devnull 
765 7763a61a 2003-11-23 devnull 	if(f->db == nil)
766 7763a61a 2003-11-23 devnull 		f->db = dirBufAlloc(f->file);
767 7763a61a 2003-11-23 devnull 
768 7763a61a 2003-11-23 devnull 	for(nb = 0; nb < cnt; nb += n) {
769 7763a61a 2003-11-23 devnull 		vd = dirBufGet(f->db);
770 7763a61a 2003-11-23 devnull 		if(vd == nil) {
771 7763a61a 2003-11-23 devnull 			if(!f->db->eof)
772 7763a61a 2003-11-23 devnull 				return -1;
773 7763a61a 2003-11-23 devnull 			break;
774 7763a61a 2003-11-23 devnull 		}
775 bbfdd7a6 2005-09-13 devnull 		n = vdStat(f->file, vd, (uchar*)p, cnt-nb);
776 7763a61a 2003-11-23 devnull 		if(n <= BIT16SZ) {
777 7763a61a 2003-11-23 devnull 			dirBufUnget(f->db);
778 7763a61a 2003-11-23 devnull 			break;
779 7763a61a 2003-11-23 devnull 		}
780 a20a1468 2005-01-16 devnull 		vdcleanup(vd);
781 7763a61a 2003-11-23 devnull 		p += n;
782 7763a61a 2003-11-23 devnull 	}
783 7763a61a 2003-11-23 devnull 	return nb;
784 7763a61a 2003-11-23 devnull }
785 7763a61a 2003-11-23 devnull 
786 7763a61a 2003-11-23 devnull Fid *
787 7763a61a 2003-11-23 devnull newfid(int fid)
788 7763a61a 2003-11-23 devnull {
789 7763a61a 2003-11-23 devnull 	Fid *f, *ff;
790 7763a61a 2003-11-23 devnull 
791 7763a61a 2003-11-23 devnull 	ff = 0;
792 7763a61a 2003-11-23 devnull 	for(f = fids; f; f = f->next)
793 7763a61a 2003-11-23 devnull 		if(f->fid == fid)
794 7763a61a 2003-11-23 devnull 			return f;
795 7763a61a 2003-11-23 devnull 		else if(!ff && !f->busy)
796 7763a61a 2003-11-23 devnull 			ff = f;
797 7763a61a 2003-11-23 devnull 	if(ff){
798 7763a61a 2003-11-23 devnull 		ff->fid = fid;
799 7763a61a 2003-11-23 devnull 		return ff;
800 7763a61a 2003-11-23 devnull 	}
801 a20a1468 2005-01-16 devnull 	f = vtmallocz(sizeof *f);
802 7763a61a 2003-11-23 devnull 	f->fid = fid;
803 7763a61a 2003-11-23 devnull 	f->next = fids;
804 7763a61a 2003-11-23 devnull 	fids = f;
805 7763a61a 2003-11-23 devnull 	return f;
806 7763a61a 2003-11-23 devnull }
807 7763a61a 2003-11-23 devnull 
808 7763a61a 2003-11-23 devnull void
809 7763a61a 2003-11-23 devnull io(void)
810 7763a61a 2003-11-23 devnull {
811 7763a61a 2003-11-23 devnull 	char *err;
812 7763a61a 2003-11-23 devnull 	int n;
813 7763a61a 2003-11-23 devnull 
814 7763a61a 2003-11-23 devnull 	for(;;){
815 7763a61a 2003-11-23 devnull 		/*
816 7763a61a 2003-11-23 devnull 		 * reading from a pipe or a network device
817 7763a61a 2003-11-23 devnull 		 * will give an error after a few eof reads
818 7763a61a 2003-11-23 devnull 		 * however, we cannot tell the difference
819 7763a61a 2003-11-23 devnull 		 * between a zero-length read and an interrupt
820 7763a61a 2003-11-23 devnull 		 * on the processes writing to us,
821 7763a61a 2003-11-23 devnull 		 * so we wait for the error
822 7763a61a 2003-11-23 devnull 		 */
823 7763a61a 2003-11-23 devnull 		n = read9pmsg(mfd[0], mdata, sizeof mdata);
824 7763a61a 2003-11-23 devnull 		if(n == 0)
825 7763a61a 2003-11-23 devnull 			continue;
826 7763a61a 2003-11-23 devnull 		if(n < 0)
827 7763a61a 2003-11-23 devnull 			break;
828 bbfdd7a6 2005-09-13 devnull 		if(convM2Su(mdata, n, &rhdr, dotu) != n)
829 7763a61a 2003-11-23 devnull 			sysfatal("convM2S conversion error");
830 7763a61a 2003-11-23 devnull 
831 7763a61a 2003-11-23 devnull 		if(dflag)
832 7763a61a 2003-11-23 devnull 			fprint(2, "vacfs:<-%F\n", &rhdr);
833 7763a61a 2003-11-23 devnull 
834 7763a61a 2003-11-23 devnull 		thdr.data = (char*)mdata + IOHDRSZ;
835 7763a61a 2003-11-23 devnull 		if(!fcalls[rhdr.type])
836 7763a61a 2003-11-23 devnull 			err = "bad fcall type";
837 7763a61a 2003-11-23 devnull 		else
838 7763a61a 2003-11-23 devnull 			err = (*fcalls[rhdr.type])(newfid(rhdr.fid));
839 7763a61a 2003-11-23 devnull 		if(err){
840 7763a61a 2003-11-23 devnull 			thdr.type = Rerror;
841 7763a61a 2003-11-23 devnull 			thdr.ename = err;
842 bbfdd7a6 2005-09-13 devnull 			thdr.errornum = 0;
843 7763a61a 2003-11-23 devnull 		}else{
844 7763a61a 2003-11-23 devnull 			thdr.type = rhdr.type + 1;
845 7763a61a 2003-11-23 devnull 			thdr.fid = rhdr.fid;
846 7763a61a 2003-11-23 devnull 		}
847 7763a61a 2003-11-23 devnull 		thdr.tag = rhdr.tag;
848 7763a61a 2003-11-23 devnull 		if(dflag)
849 7763a61a 2003-11-23 devnull 			fprint(2, "vacfs:->%F\n", &thdr);
850 bbfdd7a6 2005-09-13 devnull 		n = convS2Mu(&thdr, mdata, messagesize, dotu);
851 9e2f1d9b 2005-11-21 devnull 		if(n <= BIT16SZ)
852 9e2f1d9b 2005-11-21 devnull 			sysfatal("convS2Mu conversion error");
853 9e2f1d9b 2005-11-21 devnull 		if(err)
854 a20a1468 2005-01-16 devnull 			vtfree(err);
855 a20a1468 2005-01-16 devnull 
856 7763a61a 2003-11-23 devnull 		if(write(mfd[1], mdata, n) != n)
857 7763a61a 2003-11-23 devnull 			sysfatal("mount write: %r");
858 7763a61a 2003-11-23 devnull 	}
859 7763a61a 2003-11-23 devnull }
860 7763a61a 2003-11-23 devnull 
861 7763a61a 2003-11-23 devnull int
862 7763a61a 2003-11-23 devnull permf(VacFile *vf, char *user, int p)
863 7763a61a 2003-11-23 devnull {
864 7763a61a 2003-11-23 devnull 	VacDir dir;
865 7763a61a 2003-11-23 devnull 	ulong perm;
866 7763a61a 2003-11-23 devnull 
867 a20a1468 2005-01-16 devnull 	if(vacfilegetdir(vf, &dir))
868 7763a61a 2003-11-23 devnull 		return 0;
869 7763a61a 2003-11-23 devnull 	perm = dir.mode & 0777;
870 a20a1468 2005-01-16 devnull 
871 7763a61a 2003-11-23 devnull 	if(noperm)
872 7763a61a 2003-11-23 devnull 		goto Good;
873 7763a61a 2003-11-23 devnull 	if((p*Pother) & perm)
874 7763a61a 2003-11-23 devnull 		goto Good;
875 7763a61a 2003-11-23 devnull 	if(strcmp(user, dir.gid)==0 && ((p*Pgroup) & perm))
876 7763a61a 2003-11-23 devnull 		goto Good;
877 7763a61a 2003-11-23 devnull 	if(strcmp(user, dir.uid)==0 && ((p*Powner) & perm))
878 7763a61a 2003-11-23 devnull 		goto Good;
879 a20a1468 2005-01-16 devnull 	vdcleanup(&dir);
880 7763a61a 2003-11-23 devnull 	return 0;
881 7763a61a 2003-11-23 devnull Good:
882 a20a1468 2005-01-16 devnull 	vdcleanup(&dir);
883 7763a61a 2003-11-23 devnull 	return 1;
884 7763a61a 2003-11-23 devnull }
885 7763a61a 2003-11-23 devnull 
886 7763a61a 2003-11-23 devnull int
887 7763a61a 2003-11-23 devnull perm(Fid *f, int p)
888 7763a61a 2003-11-23 devnull {
889 7763a61a 2003-11-23 devnull 	return permf(f->file, f->user, p);
890 7763a61a 2003-11-23 devnull }
891 7763a61a 2003-11-23 devnull 
892 7763a61a 2003-11-23 devnull void
893 7763a61a 2003-11-23 devnull init(char *file, char *host, long ncache, int readOnly)
894 7763a61a 2003-11-23 devnull {
895 7763a61a 2003-11-23 devnull 	notify(notifyf);
896 7763a61a 2003-11-23 devnull 	user = getuser();
897 7763a61a 2003-11-23 devnull 
898 a20a1468 2005-01-16 devnull 	conn = vtdial(host);
899 a20a1468 2005-01-16 devnull 	if(conn == nil)
900 a20a1468 2005-01-16 devnull 		sysfatal("could not connect to server: %r");
901 7763a61a 2003-11-23 devnull 
902 a20a1468 2005-01-16 devnull 	if(vtconnect(conn) < 0)
903 a20a1468 2005-01-16 devnull 		sysfatal("vtconnect: %r");
904 7763a61a 2003-11-23 devnull 
905 a20a1468 2005-01-16 devnull 	fs = vacfsopen(conn, file, /*readOnly ? ModeSnapshot :*/ VtOREAD, ncache);
906 7763a61a 2003-11-23 devnull 	if(fs == nil)
907 a20a1468 2005-01-16 devnull 		sysfatal("vfsOpen: %r");
908 7763a61a 2003-11-23 devnull }
909 7763a61a 2003-11-23 devnull 
910 7763a61a 2003-11-23 devnull void
911 a331ac4c 2005-01-19 devnull vacshutdown(void)
912 7763a61a 2003-11-23 devnull {
913 7763a61a 2003-11-23 devnull 	Fid *f;
914 7763a61a 2003-11-23 devnull 
915 7763a61a 2003-11-23 devnull 	for(f = fids; f; f = f->next) {
916 7763a61a 2003-11-23 devnull 		if(!f->busy)
917 7763a61a 2003-11-23 devnull 			continue;
918 7763a61a 2003-11-23 devnull fprint(2, "open fid: %d\n", f->fid);
919 7763a61a 2003-11-23 devnull 		rclunk(f);
920 7763a61a 2003-11-23 devnull 	}
921 7763a61a 2003-11-23 devnull 
922 a20a1468 2005-01-16 devnull 	vacfsclose(fs);
923 a20a1468 2005-01-16 devnull 	vthangup(conn);
924 7763a61a 2003-11-23 devnull }
925 7763a61a 2003-11-23 devnull