Commit | Line | Data |
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e2e9adba | 1 | /* |
5f0f7060 KB |
2 | * Copyright (c) 1992, 1993 |
3 | * The Regents of the University of California. All rights reserved. | |
e2e9adba JSP |
4 | * All rights reserved. |
5 | * | |
6 | * This code is derived from software donated to Berkeley by | |
7 | * Jan-Simon Pendry. | |
8 | * | |
9 | * %sccs.include.redist.c% | |
10 | * | |
5f0f7060 | 11 | * @(#)fdesc_vnops.c 8.1 (Berkeley) %G% |
e2e9adba | 12 | * |
01936f59 | 13 | * $Id: fdesc_vnops.c,v 1.12 1993/04/06 16:17:17 jsp Exp $ |
e2e9adba JSP |
14 | */ |
15 | ||
16 | /* | |
17 | * /dev/fd Filesystem | |
18 | */ | |
19 | ||
20 | #include <sys/param.h> | |
21 | #include <sys/systm.h> | |
22 | #include <sys/types.h> | |
23 | #include <sys/time.h> | |
24 | #include <sys/proc.h> | |
01936f59 | 25 | #include <sys/kernel.h> /* boottime */ |
e2e9adba JSP |
26 | #include <sys/resourcevar.h> |
27 | #include <sys/filedesc.h> | |
28 | #include <sys/vnode.h> | |
29 | #include <sys/malloc.h> | |
30 | #include <sys/file.h> | |
31 | #include <sys/stat.h> | |
32 | #include <sys/mount.h> | |
33 | #include <sys/namei.h> | |
34 | #include <sys/buf.h> | |
13ef814e | 35 | #include <sys/dirent.h> |
5e3f92c4 | 36 | #include <miscfs/fdesc/fdesc.h> |
e2e9adba | 37 | |
01936f59 JSP |
38 | #define cttyvp(p) ((p)->p_flag&SCTTY ? (p)->p_session->s_ttyvp : NULL) |
39 | ||
40 | #define FDL_WANT 0x01 | |
41 | #define FDL_LOCKED 0x02 | |
42 | static int fdescvplock; | |
43 | static struct vnode *fdescvp[FD_MAX]; | |
44 | ||
45 | #if (FD_STDIN != FD_STDOUT-1) || (FD_STDOUT != FD_STDERR-1) | |
46 | FD_STDIN, FD_STDOUT, FD_STDERR must be a sequence n, n+1, n+2 | |
47 | #endif | |
48 | ||
49 | fdesc_allocvp(ftype, ix, mp, vpp) | |
50 | fdntype ftype; | |
51 | int ix; | |
52 | struct mount *mp; | |
53 | struct vnode **vpp; | |
54 | { | |
55 | struct vnode **nvpp = 0; | |
56 | int error = 0; | |
57 | ||
a6382592 | 58 | loop: |
01936f59 JSP |
59 | /* get stashed copy of the vnode */ |
60 | if (ix >= 0 && ix < FD_MAX) { | |
61 | nvpp = &fdescvp[ix]; | |
a6382592 JSP |
62 | if (*nvpp) { |
63 | if (vget(*nvpp)) | |
64 | goto loop; | |
4f4c2135 | 65 | VOP_UNLOCK(*nvpp); |
01936f59 | 66 | *vpp = *nvpp; |
01936f59 JSP |
67 | return (error); |
68 | } | |
69 | } | |
70 | ||
71 | /* | |
72 | * otherwise lock the array while we call getnewvnode | |
73 | * since that can block. | |
74 | */ | |
a6382592 | 75 | if (fdescvplock & FDL_LOCKED) { |
01936f59 JSP |
76 | fdescvplock |= FDL_WANT; |
77 | sleep((caddr_t) &fdescvplock, PINOD); | |
a6382592 | 78 | goto loop; |
01936f59 JSP |
79 | } |
80 | fdescvplock |= FDL_LOCKED; | |
81 | ||
82 | error = getnewvnode(VT_UFS, mp, fdesc_vnodeop_p, vpp); | |
83 | if (error) | |
84 | goto out; | |
85 | MALLOC((*vpp)->v_data, void *, sizeof(struct fdescnode), M_TEMP, M_WAITOK); | |
86 | if (nvpp) | |
87 | *nvpp = *vpp; | |
88 | VTOFDESC(*vpp)->fd_type = ftype; | |
89 | VTOFDESC(*vpp)->fd_fd = -1; | |
90 | VTOFDESC(*vpp)->fd_link = 0; | |
91 | VTOFDESC(*vpp)->fd_ix = ix; | |
92 | ||
93 | out:; | |
94 | fdescvplock &= ~FDL_LOCKED; | |
95 | ||
96 | if (fdescvplock & FDL_WANT) { | |
97 | fdescvplock &= ~FDL_WANT; | |
98 | wakeup((caddr_t) &fdescvplock); | |
99 | } | |
100 | ||
101 | return (error); | |
102 | } | |
103 | ||
e2e9adba JSP |
104 | /* |
105 | * vp is the current namei directory | |
106 | * ndp is the name to locate in that directory... | |
107 | */ | |
5e3f92c4 KM |
108 | fdesc_lookup(ap) |
109 | struct vop_lookup_args /* { | |
110 | struct vnode * a_dvp; | |
111 | struct vnode ** a_vpp; | |
112 | struct componentname * a_cnp; | |
113 | } */ *ap; | |
e2e9adba | 114 | { |
a02db9dd JSP |
115 | struct vnode **vpp = ap->a_vpp; |
116 | struct vnode *dvp = ap->a_dvp; | |
e2e9adba JSP |
117 | char *pname; |
118 | struct proc *p; | |
119 | int nfiles; | |
120 | unsigned fd; | |
121 | int error; | |
122 | struct vnode *fvp; | |
01936f59 | 123 | char *ln; |
e2e9adba JSP |
124 | |
125 | #ifdef FDESC_DIAGNOSTIC | |
126 | printf("fdesc_lookup(%x)\n", ap); | |
a02db9dd | 127 | printf("fdesc_lookup(dp = %x, vpp = %x, cnp = %x)\n", dvp, vpp, ap->a_cnp); |
e2e9adba JSP |
128 | #endif |
129 | pname = ap->a_cnp->cn_nameptr; | |
130 | #ifdef FDESC_DIAGNOSTIC | |
131 | printf("fdesc_lookup(%s)\n", pname); | |
132 | #endif | |
133 | if (ap->a_cnp->cn_namelen == 1 && *pname == '.') { | |
a02db9dd JSP |
134 | *vpp = dvp; |
135 | VREF(dvp); | |
01936f59 | 136 | VOP_LOCK(dvp); |
e2e9adba JSP |
137 | return (0); |
138 | } | |
139 | ||
140 | p = ap->a_cnp->cn_proc; | |
141 | nfiles = p->p_fd->fd_nfiles; | |
142 | ||
01936f59 JSP |
143 | switch (VTOFDESC(dvp)->fd_type) { |
144 | default: | |
145 | case Flink: | |
146 | case Fdesc: | |
147 | case Fctty: | |
148 | error = ENOTDIR; | |
149 | goto bad; | |
150 | ||
151 | case Froot: | |
152 | if (ap->a_cnp->cn_namelen == 2 && bcmp(pname, "fd", 2) == 0) { | |
153 | error = fdesc_allocvp(Fdevfd, FD_DEVFD, dvp->v_mount, &fvp); | |
154 | if (error) | |
155 | goto bad; | |
156 | *vpp = fvp; | |
157 | fvp->v_type = VDIR; | |
158 | VOP_LOCK(fvp); | |
159 | #ifdef FDESC_DIAGNOSTIC | |
160 | printf("fdesc_lookup: newvp = %x\n", fvp); | |
161 | #endif | |
162 | return (0); | |
163 | } | |
164 | ||
165 | if (ap->a_cnp->cn_namelen == 3 && bcmp(pname, "tty", 3) == 0) { | |
166 | struct vnode *ttyvp = cttyvp(p); | |
167 | if (ttyvp == NULL) { | |
168 | error = ENXIO; | |
169 | goto bad; | |
170 | } | |
171 | error = fdesc_allocvp(Fctty, FD_CTTY, dvp->v_mount, &fvp); | |
172 | if (error) | |
173 | goto bad; | |
174 | *vpp = fvp; | |
175 | fvp->v_type = VFIFO; | |
176 | VOP_LOCK(fvp); | |
177 | #ifdef FDESC_DIAGNOSTIC | |
178 | printf("fdesc_lookup: ttyvp = %x\n", fvp); | |
179 | #endif | |
180 | return (0); | |
181 | } | |
182 | ||
183 | ln = 0; | |
184 | switch (ap->a_cnp->cn_namelen) { | |
185 | case 5: | |
186 | if (bcmp(pname, "stdin", 5) == 0) { | |
187 | ln = "fd/0"; | |
188 | fd = FD_STDIN; | |
189 | } | |
e2e9adba | 190 | break; |
01936f59 JSP |
191 | case 6: |
192 | if (bcmp(pname, "stdout", 6) == 0) { | |
193 | ln = "fd/1"; | |
194 | fd = FD_STDOUT; | |
195 | } else | |
196 | if (bcmp(pname, "stderr", 6) == 0) { | |
197 | ln = "fd/2"; | |
198 | fd = FD_STDERR; | |
199 | } | |
200 | break; | |
201 | } | |
e2e9adba | 202 | |
01936f59 | 203 | if (ln) { |
e2e9adba | 204 | #ifdef FDESC_DIAGNOSTIC |
01936f59 | 205 | printf("fdesc_lookup: link -> %s\n", ln); |
e2e9adba | 206 | #endif |
01936f59 JSP |
207 | error = fdesc_allocvp(Flink, fd, dvp->v_mount, &fvp); |
208 | if (error) | |
209 | goto bad; | |
210 | VTOFDESC(fvp)->fd_link = ln; | |
211 | *vpp = fvp; | |
212 | fvp->v_type = VLNK; | |
213 | VOP_LOCK(fvp); | |
214 | #ifdef FDESC_DIAGNOSTIC | |
215 | printf("fdesc_lookup: newvp = %x\n", fvp); | |
216 | #endif | |
217 | return (0); | |
218 | } else { | |
219 | error = ENOENT; | |
220 | goto bad; | |
221 | } | |
e2e9adba | 222 | |
01936f59 JSP |
223 | /* fall through */ |
224 | ||
225 | case Fdevfd: | |
226 | if (ap->a_cnp->cn_namelen == 2 && bcmp(pname, "..", 2) == 0) { | |
227 | error = fdesc_root(dvp->v_mount, vpp); | |
228 | return (error); | |
229 | } | |
230 | ||
231 | fd = 0; | |
232 | while (*pname >= '0' && *pname <= '9') { | |
233 | fd = 10 * fd + *pname++ - '0'; | |
234 | if (fd >= nfiles) | |
235 | break; | |
236 | } | |
e2e9adba JSP |
237 | |
238 | #ifdef FDESC_DIAGNOSTIC | |
01936f59 | 239 | printf("fdesc_lookup: fd = %d, *pname = %x\n", fd, *pname); |
e2e9adba | 240 | #endif |
01936f59 JSP |
241 | if (*pname != '\0') { |
242 | error = ENOENT; | |
243 | goto bad; | |
244 | } | |
245 | ||
246 | if (fd >= nfiles || p->p_fd->fd_ofiles[fd] == NULL) { | |
247 | error = EBADF; | |
248 | goto bad; | |
249 | } | |
250 | ||
e2e9adba | 251 | #ifdef FDESC_DIAGNOSTIC |
01936f59 | 252 | printf("fdesc_lookup: allocate new vnode\n"); |
e2e9adba | 253 | #endif |
01936f59 JSP |
254 | error = fdesc_allocvp(Fdesc, FD_DESC+fd, dvp->v_mount, &fvp); |
255 | if (error) | |
256 | goto bad; | |
257 | VTOFDESC(fvp)->fd_fd = fd; | |
258 | *vpp = fvp; | |
259 | #ifdef FDESC_DIAGNOSTIC | |
260 | printf("fdesc_lookup: newvp = %x\n", fvp); | |
261 | #endif | |
262 | return (0); | |
263 | } | |
e2e9adba JSP |
264 | |
265 | bad:; | |
a02db9dd | 266 | *vpp = NULL; |
e2e9adba JSP |
267 | #ifdef FDESC_DIAGNOSTIC |
268 | printf("fdesc_lookup: error = %d\n", error); | |
269 | #endif | |
270 | return (error); | |
271 | } | |
272 | ||
5e3f92c4 KM |
273 | fdesc_open(ap) |
274 | struct vop_open_args /* { | |
275 | struct vnode *a_vp; | |
276 | int a_mode; | |
277 | struct ucred *a_cred; | |
278 | struct proc *a_p; | |
279 | } */ *ap; | |
e2e9adba | 280 | { |
a02db9dd | 281 | struct vnode *vp = ap->a_vp; |
01936f59 JSP |
282 | int error = 0; |
283 | ||
284 | switch (VTOFDESC(vp)->fd_type) { | |
285 | case Fdesc: | |
286 | /* | |
287 | * XXX Kludge: set p->p_dupfd to contain the value of the | |
288 | * the file descriptor being sought for duplication. The error | |
289 | * return ensures that the vnode for this device will be | |
290 | * released by vn_open. Open will detect this special error and | |
291 | * take the actions in dupfdopen. Other callers of vn_open or | |
292 | * VOP_OPEN will simply report the error. | |
293 | */ | |
294 | ap->a_p->p_dupfd = VTOFDESC(vp)->fd_fd; /* XXX */ | |
295 | error = ENODEV; | |
296 | break; | |
a02db9dd | 297 | |
01936f59 JSP |
298 | case Fctty: |
299 | error = cttyopen(devctty, ap->a_mode, 0, ap->a_p); | |
300 | break; | |
301 | } | |
e2e9adba | 302 | |
01936f59 | 303 | return (error); |
e2e9adba JSP |
304 | } |
305 | ||
306 | static int | |
307 | fdesc_attr(fd, vap, cred, p) | |
308 | int fd; | |
309 | struct vattr *vap; | |
310 | struct ucred *cred; | |
311 | struct proc *p; | |
312 | { | |
e2e9adba JSP |
313 | struct filedesc *fdp = p->p_fd; |
314 | struct file *fp; | |
7e204c1b | 315 | struct stat stb; |
e2e9adba JSP |
316 | int error; |
317 | ||
318 | #ifdef FDESC_DIAGNOSTIC | |
319 | printf("fdesc_attr: fd = %d, nfiles = %d\n", fd, fdp->fd_nfiles); | |
320 | #endif | |
321 | if (fd >= fdp->fd_nfiles || (fp = fdp->fd_ofiles[fd]) == NULL) { | |
322 | #ifdef FDESC_DIAGNOSTIC | |
323 | printf("fdesc_attr: fp = %x (EBADF)\n", fp); | |
324 | #endif | |
325 | return (EBADF); | |
326 | } | |
327 | ||
e2e9adba JSP |
328 | switch (fp->f_type) { |
329 | case DTYPE_VNODE: | |
330 | error = VOP_GETATTR((struct vnode *) fp->f_data, vap, cred, p); | |
52e93dd0 JSP |
331 | if (error == 0 && vap->va_type == VDIR) { |
332 | /* | |
333 | * don't allow directories to show up because | |
334 | * that causes loops in the namespace. | |
335 | */ | |
336 | vap->va_type = VFIFO; | |
337 | } | |
e2e9adba JSP |
338 | break; |
339 | ||
340 | case DTYPE_SOCKET: | |
7e204c1b JSP |
341 | error = soo_stat((struct socket *)fp->f_data, &stb); |
342 | if (error == 0) { | |
343 | vattr_null(vap); | |
344 | vap->va_type = VSOCK; | |
345 | vap->va_mode = stb.st_mode; | |
346 | vap->va_nlink = stb.st_nlink; | |
347 | vap->va_uid = stb.st_uid; | |
348 | vap->va_gid = stb.st_gid; | |
349 | vap->va_fsid = stb.st_dev; | |
350 | vap->va_fileid = stb.st_ino; | |
351 | vap->va_size = stb.st_size; | |
352 | vap->va_blocksize = stb.st_blksize; | |
353 | vap->va_atime = stb.st_atimespec; | |
354 | vap->va_mtime = stb.st_mtimespec; | |
355 | vap->va_ctime = stb.st_ctimespec; | |
356 | vap->va_gen = stb.st_gen; | |
357 | vap->va_flags = stb.st_flags; | |
358 | vap->va_rdev = stb.st_rdev; | |
359 | vap->va_bytes = stb.st_blocks * stb.st_blksize; | |
360 | } | |
e2e9adba JSP |
361 | break; |
362 | ||
363 | default: | |
364 | panic("fdesc attr"); | |
365 | break; | |
366 | } | |
367 | ||
368 | #ifdef FDESC_DIAGNOSTIC | |
369 | printf("fdesc_attr: returns error %d\n", error); | |
370 | #endif | |
371 | return (error); | |
372 | } | |
373 | ||
5e3f92c4 KM |
374 | fdesc_getattr(ap) |
375 | struct vop_getattr_args /* { | |
376 | struct vnode *a_vp; | |
377 | struct vattr *a_vap; | |
378 | struct ucred *a_cred; | |
379 | struct proc *a_p; | |
380 | } */ *ap; | |
e2e9adba | 381 | { |
a02db9dd JSP |
382 | struct vnode *vp = ap->a_vp; |
383 | struct vattr *vap = ap->a_vap; | |
e2e9adba | 384 | unsigned fd; |
6a6b2974 | 385 | int error = 0; |
e2e9adba | 386 | |
e2e9adba | 387 | #ifdef FDESC_DIAGNOSTIC |
01936f59 | 388 | printf("fdesc_getattr: stat type = %d\n", VTOFDESC(vp)->fd_type); |
e2e9adba | 389 | #endif |
01936f59 JSP |
390 | |
391 | switch (VTOFDESC(vp)->fd_type) { | |
392 | case Froot: | |
393 | case Fdevfd: | |
394 | case Flink: | |
395 | case Fctty: | |
a02db9dd JSP |
396 | bzero((caddr_t) vap, sizeof(*vap)); |
397 | vattr_null(vap); | |
01936f59 JSP |
398 | vap->va_fileid = VTOFDESC(vp)->fd_ix; |
399 | ||
400 | switch (VTOFDESC(vp)->fd_type) { | |
401 | case Flink: | |
402 | vap->va_mode = S_IRUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH; | |
403 | vap->va_type = VLNK; | |
404 | vap->va_nlink = 1; | |
405 | /* vap->va_qsize = strlen(VTOFDESC(vp)->fd_link); */ | |
406 | vap->va_size = strlen(VTOFDESC(vp)->fd_link); | |
407 | break; | |
408 | ||
409 | case Fctty: | |
410 | vap->va_mode = S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH; | |
411 | vap->va_type = VFIFO; | |
412 | vap->va_nlink = 1; | |
413 | /* vap->va_qsize = 0; */ | |
414 | vap->va_size = 0; | |
415 | break; | |
416 | ||
417 | default: | |
418 | vap->va_mode = S_IRUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH; | |
419 | vap->va_type = VDIR; | |
420 | vap->va_nlink = 2; | |
421 | /* vap->va_qsize = 0; */ | |
422 | vap->va_size = DEV_BSIZE; | |
423 | break; | |
424 | } | |
a02db9dd JSP |
425 | vap->va_uid = 0; |
426 | vap->va_gid = 0; | |
427 | vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0]; | |
a02db9dd | 428 | vap->va_blocksize = DEV_BSIZE; |
01936f59 JSP |
429 | vap->va_atime.ts_sec = boottime.tv_sec; |
430 | vap->va_atime.ts_nsec = 0; | |
a02db9dd JSP |
431 | vap->va_mtime = vap->va_atime; |
432 | vap->va_ctime = vap->va_ctime; | |
433 | vap->va_gen = 0; | |
434 | vap->va_flags = 0; | |
435 | vap->va_rdev = 0; | |
436 | /* vap->va_qbytes = 0; */ | |
437 | vap->va_bytes = 0; | |
01936f59 JSP |
438 | break; |
439 | ||
440 | case Fdesc: | |
441 | #ifdef FDESC_DIAGNOSTIC | |
442 | printf("fdesc_getattr: stat desc #%d\n", VTOFDESC(vp)->fd_fd); | |
443 | #endif | |
444 | fd = VTOFDESC(vp)->fd_fd; | |
445 | error = fdesc_attr(fd, vap, ap->a_cred, ap->a_p); | |
446 | break; | |
447 | ||
448 | default: | |
449 | panic("fdesc_getattr"); | |
450 | break; | |
e2e9adba JSP |
451 | } |
452 | ||
e2e9adba | 453 | if (error == 0) |
a02db9dd | 454 | vp->v_type = vap->va_type; |
01936f59 JSP |
455 | |
456 | #ifdef FDESC_DIAGNOSTIC | |
457 | printf("fdesc_getattr: stat returns 0\n"); | |
458 | #endif | |
e2e9adba JSP |
459 | return (error); |
460 | } | |
461 | ||
5e3f92c4 KM |
462 | fdesc_setattr(ap) |
463 | struct vop_setattr_args /* { | |
464 | struct vnode *a_vp; | |
465 | struct vattr *a_vap; | |
466 | struct ucred *a_cred; | |
467 | struct proc *a_p; | |
468 | } */ *ap; | |
e2e9adba | 469 | { |
e2e9adba JSP |
470 | struct filedesc *fdp = ap->a_p->p_fd; |
471 | struct file *fp; | |
472 | unsigned fd; | |
473 | int error; | |
474 | ||
475 | /* | |
476 | * Can't mess with the root vnode | |
477 | */ | |
01936f59 JSP |
478 | switch (VTOFDESC(ap->a_vp)->fd_type) { |
479 | case Fdesc: | |
480 | break; | |
481 | ||
482 | case Fctty: | |
483 | return (0); | |
484 | ||
485 | default: | |
e2e9adba | 486 | return (EACCES); |
01936f59 | 487 | } |
e2e9adba | 488 | |
01936f59 | 489 | fd = VTOFDESC(ap->a_vp)->fd_fd; |
e2e9adba JSP |
490 | #ifdef FDESC_DIAGNOSTIC |
491 | printf("fdesc_setattr: fd = %d, nfiles = %d\n", fd, fdp->fd_nfiles); | |
492 | #endif | |
493 | if (fd >= fdp->fd_nfiles || (fp = fdp->fd_ofiles[fd]) == NULL) { | |
494 | #ifdef FDESC_DIAGNOSTIC | |
495 | printf("fdesc_setattr: fp = %x (EBADF)\n", fp); | |
496 | #endif | |
497 | return (EBADF); | |
498 | } | |
499 | ||
500 | /* | |
501 | * Can setattr the underlying vnode, but not sockets! | |
502 | */ | |
503 | switch (fp->f_type) { | |
504 | case DTYPE_VNODE: | |
505 | error = VOP_SETATTR((struct vnode *) fp->f_data, ap->a_vap, ap->a_cred, ap->a_p); | |
506 | break; | |
507 | ||
508 | case DTYPE_SOCKET: | |
d5ef2099 | 509 | error = 0; |
e2e9adba JSP |
510 | break; |
511 | ||
512 | default: | |
513 | panic("fdesc setattr"); | |
514 | break; | |
515 | } | |
516 | ||
517 | #ifdef FDESC_DIAGNOSTIC | |
518 | printf("fdesc_setattr: returns error %d\n", error); | |
519 | #endif | |
520 | return (error); | |
521 | } | |
522 | ||
01936f59 JSP |
523 | #define UIO_MX 16 |
524 | ||
525 | static struct dirtmp { | |
526 | u_long d_fileno; | |
527 | u_short d_reclen; | |
528 | u_short d_namlen; | |
529 | char d_name[8]; | |
530 | } rootent[] = { | |
531 | { FD_DEVFD, UIO_MX, 2, "fd" }, | |
532 | { FD_STDIN, UIO_MX, 5, "stdin" }, | |
533 | { FD_STDOUT, UIO_MX, 6, "stdout" }, | |
534 | { FD_STDERR, UIO_MX, 6, "stderr" }, | |
535 | { FD_CTTY, UIO_MX, 3, "tty" }, | |
536 | { 0 } | |
537 | }; | |
538 | ||
5e3f92c4 KM |
539 | fdesc_readdir(ap) |
540 | struct vop_readdir_args /* { | |
541 | struct vnode *a_vp; | |
542 | struct uio *a_uio; | |
543 | struct ucred *a_cred; | |
544 | } */ *ap; | |
e2e9adba | 545 | { |
a02db9dd | 546 | struct uio *uio = ap->a_uio; |
e2e9adba JSP |
547 | struct filedesc *fdp; |
548 | int i; | |
549 | int error; | |
550 | ||
01936f59 JSP |
551 | switch (VTOFDESC(ap->a_vp)->fd_type) { |
552 | case Fctty: | |
553 | return (0); | |
554 | ||
555 | case Fdesc: | |
556 | return (ENOTDIR); | |
557 | ||
558 | default: | |
559 | break; | |
560 | } | |
e2e9adba | 561 | |
a02db9dd | 562 | fdp = uio->uio_procp->p_fd; |
01936f59 JSP |
563 | |
564 | if (VTOFDESC(ap->a_vp)->fd_type == Froot) { | |
565 | struct dirent d; | |
566 | struct dirent *dp = &d; | |
567 | struct dirtmp *dt; | |
568 | ||
569 | i = uio->uio_offset / UIO_MX; | |
570 | error = 0; | |
571 | ||
572 | while (uio->uio_resid > 0) { | |
573 | dt = &rootent[i]; | |
574 | if (dt->d_fileno == 0) { | |
575 | /**eofflagp = 1;*/ | |
576 | break; | |
577 | } | |
578 | i++; | |
579 | ||
580 | switch (dt->d_fileno) { | |
581 | case FD_CTTY: | |
582 | if (cttyvp(uio->uio_procp) == NULL) | |
583 | continue; | |
584 | break; | |
585 | ||
586 | case FD_STDIN: | |
587 | case FD_STDOUT: | |
588 | case FD_STDERR: | |
589 | if ((i-FD_STDIN) >= fdp->fd_nfiles) | |
590 | continue; | |
591 | if (fdp->fd_ofiles[i-FD_STDIN] == NULL) | |
592 | continue; | |
593 | break; | |
594 | } | |
595 | bzero(dp, UIO_MX); | |
596 | dp->d_fileno = dt->d_fileno; | |
597 | dp->d_namlen = dt->d_namlen; | |
598 | dp->d_type = DT_UNKNOWN; | |
599 | dp->d_reclen = dt->d_reclen; | |
600 | bcopy(dt->d_name, dp->d_name, dp->d_namlen+1); | |
601 | error = uiomove((caddr_t) dp, UIO_MX, uio); | |
602 | if (error) | |
603 | break; | |
604 | } | |
605 | uio->uio_offset = i * UIO_MX; | |
606 | return (error); | |
607 | } | |
608 | ||
a02db9dd | 609 | i = uio->uio_offset / UIO_MX; |
e2e9adba | 610 | error = 0; |
a02db9dd | 611 | while (uio->uio_resid > 0) { |
e2e9adba | 612 | if (i >= fdp->fd_nfiles) { |
159e7bde | 613 | /* *ap->a_eofflagp = 1; */ |
e2e9adba JSP |
614 | break; |
615 | } | |
616 | if (fdp->fd_ofiles[i] != NULL) { | |
13ef814e JSP |
617 | struct dirent d; |
618 | struct dirent *dp = &d; | |
e2e9adba | 619 | char *cp = dp->d_name; |
e2e9adba JSP |
620 | bzero((caddr_t) dp, UIO_MX); |
621 | ||
622 | dp->d_namlen = sprintf(dp->d_name, "%d", i); | |
623 | /* | |
624 | * Fill in the remaining fields | |
625 | */ | |
626 | dp->d_reclen = UIO_MX; | |
13ef814e | 627 | dp->d_type = DT_UNKNOWN; |
01936f59 | 628 | dp->d_fileno = i + FD_STDIN; |
e2e9adba JSP |
629 | /* |
630 | * And ship to userland | |
631 | */ | |
a02db9dd | 632 | error = uiomove((caddr_t) dp, UIO_MX, uio); |
e2e9adba JSP |
633 | if (error) |
634 | break; | |
635 | } | |
636 | i++; | |
637 | } | |
638 | ||
a02db9dd | 639 | uio->uio_offset = i * UIO_MX; |
e2e9adba JSP |
640 | return (error); |
641 | } | |
642 | ||
01936f59 JSP |
643 | int |
644 | fdesc_readlink(ap) | |
645 | struct vop_readlink_args /* { | |
646 | struct vnode *a_vp; | |
647 | struct uio *a_uio; | |
648 | struct ucred *a_cred; | |
649 | } */ *ap; | |
650 | { | |
651 | register struct vnode *vp = ap->a_vp; | |
652 | int error; | |
653 | ||
654 | if (vp->v_type != VLNK) | |
655 | return (EPERM); | |
656 | ||
657 | if (VTOFDESC(vp)->fd_type == Flink) { | |
658 | char *ln = VTOFDESC(vp)->fd_link; | |
659 | error = uiomove(ln, strlen(ln), ap->a_uio); | |
660 | } else { | |
661 | error = EOPNOTSUPP; | |
662 | } | |
663 | ||
664 | return (error); | |
665 | } | |
666 | ||
667 | fdesc_read(ap) | |
668 | struct vop_read_args /* { | |
669 | struct vnode *a_vp; | |
670 | struct uio *a_uio; | |
671 | int a_ioflag; | |
672 | struct ucred *a_cred; | |
673 | } */ *ap; | |
674 | { | |
675 | int error = EOPNOTSUPP; | |
676 | ||
677 | switch (VTOFDESC(ap->a_vp)->fd_type) { | |
678 | case Fctty: | |
679 | error = cttyread(devctty, ap->a_uio, ap->a_ioflag); | |
680 | break; | |
681 | ||
682 | default: | |
683 | error = EOPNOTSUPP; | |
684 | break; | |
685 | } | |
686 | ||
687 | return (error); | |
688 | } | |
689 | ||
690 | fdesc_write(ap) | |
691 | struct vop_write_args /* { | |
692 | struct vnode *a_vp; | |
693 | struct uio *a_uio; | |
694 | int a_ioflag; | |
695 | struct ucred *a_cred; | |
696 | } */ *ap; | |
697 | { | |
698 | int error = EOPNOTSUPP; | |
699 | ||
700 | switch (VTOFDESC(ap->a_vp)->fd_type) { | |
701 | case Fctty: | |
702 | error = cttywrite(devctty, ap->a_uio, ap->a_ioflag); | |
703 | break; | |
704 | ||
705 | default: | |
706 | error = EOPNOTSUPP; | |
707 | break; | |
708 | } | |
709 | ||
710 | return (error); | |
711 | } | |
712 | ||
713 | fdesc_ioctl(ap) | |
714 | struct vop_ioctl_args /* { | |
715 | struct vnode *a_vp; | |
716 | int a_command; | |
717 | caddr_t a_data; | |
718 | int a_fflag; | |
719 | struct ucred *a_cred; | |
720 | struct proc *a_p; | |
721 | } */ *ap; | |
722 | { | |
723 | int error = EOPNOTSUPP; | |
724 | ||
725 | #ifdef FDESC_DIAGNOSTIC | |
726 | printf("fdesc_ioctl: type = %d, command = %x\n", | |
727 | VTOFDESC(ap->a_vp)->fd_type, ap->a_command); | |
728 | #endif | |
729 | switch (VTOFDESC(ap->a_vp)->fd_type) { | |
730 | case Fctty: | |
731 | error = cttyioctl(devctty, ap->a_command, ap->a_data, | |
732 | ap->a_fflag, ap->a_p); | |
733 | break; | |
734 | ||
735 | default: | |
736 | error = EOPNOTSUPP; | |
737 | break; | |
738 | } | |
739 | ||
740 | return (error); | |
741 | } | |
742 | ||
743 | fdesc_select(ap) | |
744 | struct vop_select_args /* { | |
745 | struct vnode *a_vp; | |
746 | int a_which; | |
747 | int a_fflags; | |
748 | struct ucred *a_cred; | |
749 | struct proc *a_p; | |
750 | } */ *ap; | |
751 | { | |
752 | int error = EOPNOTSUPP; | |
753 | ||
754 | switch (VTOFDESC(ap->a_vp)->fd_type) { | |
755 | case Fctty: | |
756 | error = cttyselect(devctty, ap->a_fflags, ap->a_p); | |
757 | break; | |
758 | ||
759 | default: | |
760 | error = EOPNOTSUPP; | |
761 | break; | |
762 | } | |
763 | ||
764 | return (error); | |
765 | } | |
766 | ||
5e3f92c4 KM |
767 | fdesc_inactive(ap) |
768 | struct vop_inactive_args /* { | |
769 | struct vnode *a_vp; | |
770 | } */ *ap; | |
e2e9adba | 771 | { |
a02db9dd JSP |
772 | struct vnode *vp = ap->a_vp; |
773 | ||
e2e9adba JSP |
774 | /* |
775 | * Clear out the v_type field to avoid | |
776 | * nasty things happening in vgone(). | |
777 | */ | |
a02db9dd | 778 | vp->v_type = VNON; |
e2e9adba | 779 | #ifdef FDESC_DIAGNOSTIC |
a02db9dd | 780 | printf("fdesc_inactive(%x)\n", vp); |
e2e9adba JSP |
781 | #endif |
782 | return (0); | |
783 | } | |
784 | ||
5e3f92c4 KM |
785 | fdesc_reclaim(ap) |
786 | struct vop_reclaim_args /* { | |
787 | struct vnode *a_vp; | |
788 | } */ *ap; | |
e2e9adba JSP |
789 | { |
790 | struct vnode *vp = ap->a_vp; | |
01936f59 JSP |
791 | int ix; |
792 | ||
793 | #ifdef FDESC_DIAGNOSTIC | |
e2e9adba | 794 | printf("fdesc_reclaim(%x)\n", vp); |
01936f59 JSP |
795 | #endif |
796 | ix = VTOFDESC(vp)->fd_ix; | |
797 | if (ix >= 0 && ix < FD_MAX) { | |
798 | if (fdescvp[ix] != vp) | |
799 | panic("fdesc_reclaim"); | |
800 | fdescvp[ix] = 0; | |
801 | } | |
e2e9adba JSP |
802 | if (vp->v_data) { |
803 | FREE(vp->v_data, M_TEMP); | |
804 | vp->v_data = 0; | |
805 | } | |
806 | return (0); | |
807 | } | |
808 | ||
809 | /* | |
810 | * Print out the contents of a /dev/fd vnode. | |
811 | */ | |
812 | /* ARGSUSED */ | |
5e3f92c4 KM |
813 | fdesc_print(ap) |
814 | struct vop_print_args /* { | |
815 | struct vnode *a_vp; | |
816 | } */ *ap; | |
e2e9adba | 817 | { |
5e3f92c4 | 818 | |
e2e9adba | 819 | printf("tag VT_NON, fdesc vnode\n"); |
5e3f92c4 | 820 | return (0); |
e2e9adba JSP |
821 | } |
822 | ||
823 | /*void*/ | |
5e3f92c4 KM |
824 | fdesc_vfree(ap) |
825 | struct vop_vfree_args /* { | |
826 | struct vnode *a_pvp; | |
827 | ino_t a_ino; | |
828 | int a_mode; | |
829 | } */ *ap; | |
e2e9adba JSP |
830 | { |
831 | ||
5e3f92c4 | 832 | return (0); |
e2e9adba JSP |
833 | } |
834 | ||
835 | /* | |
836 | * /dev/fd vnode unsupported operation | |
837 | */ | |
838 | fdesc_enotsupp() | |
839 | { | |
5e3f92c4 | 840 | |
e2e9adba JSP |
841 | return (EOPNOTSUPP); |
842 | } | |
843 | ||
844 | /* | |
845 | * /dev/fd "should never get here" operation | |
846 | */ | |
847 | fdesc_badop() | |
848 | { | |
5e3f92c4 | 849 | |
e2e9adba JSP |
850 | panic("fdesc: bad op"); |
851 | /* NOTREACHED */ | |
852 | } | |
853 | ||
854 | /* | |
855 | * /dev/fd vnode null operation | |
856 | */ | |
857 | fdesc_nullop() | |
858 | { | |
5e3f92c4 | 859 | |
e2e9adba JSP |
860 | return (0); |
861 | } | |
862 | ||
863 | #define fdesc_create ((int (*) __P((struct vop_create_args *)))fdesc_enotsupp) | |
864 | #define fdesc_mknod ((int (*) __P((struct vop_mknod_args *)))fdesc_enotsupp) | |
865 | #define fdesc_close ((int (*) __P((struct vop_close_args *)))nullop) | |
866 | #define fdesc_access ((int (*) __P((struct vop_access_args *)))nullop) | |
e2e9adba JSP |
867 | #define fdesc_mmap ((int (*) __P((struct vop_mmap_args *)))fdesc_enotsupp) |
868 | #define fdesc_fsync ((int (*) __P((struct vop_fsync_args *)))nullop) | |
869 | #define fdesc_seek ((int (*) __P((struct vop_seek_args *)))nullop) | |
870 | #define fdesc_remove ((int (*) __P((struct vop_remove_args *)))fdesc_enotsupp) | |
871 | #define fdesc_link ((int (*) __P((struct vop_link_args *)))fdesc_enotsupp) | |
872 | #define fdesc_rename ((int (*) __P((struct vop_rename_args *)))fdesc_enotsupp) | |
873 | #define fdesc_mkdir ((int (*) __P((struct vop_mkdir_args *)))fdesc_enotsupp) | |
874 | #define fdesc_rmdir ((int (*) __P((struct vop_rmdir_args *)))fdesc_enotsupp) | |
5e3f92c4 | 875 | #define fdesc_symlink ((int (*) __P((struct vop_symlink_args *)))fdesc_enotsupp) |
e2e9adba JSP |
876 | #define fdesc_abortop ((int (*) __P((struct vop_abortop_args *)))nullop) |
877 | #define fdesc_lock ((int (*) __P((struct vop_lock_args *)))nullop) | |
878 | #define fdesc_unlock ((int (*) __P((struct vop_unlock_args *)))nullop) | |
879 | #define fdesc_bmap ((int (*) __P((struct vop_bmap_args *)))fdesc_badop) | |
880 | #define fdesc_strategy ((int (*) __P((struct vop_strategy_args *)))fdesc_badop) | |
881 | #define fdesc_islocked ((int (*) __P((struct vop_islocked_args *)))nullop) | |
5e3f92c4 | 882 | #define fdesc_advlock ((int (*) __P((struct vop_advlock_args *)))fdesc_enotsupp) |
b076d1ce | 883 | #define fdesc_blkatoff \ |
5e3f92c4 | 884 | ((int (*) __P((struct vop_blkatoff_args *)))fdesc_enotsupp) |
e2e9adba JSP |
885 | #define fdesc_vget ((int (*) __P((struct vop_vget_args *)))fdesc_enotsupp) |
886 | #define fdesc_valloc ((int(*) __P(( \ | |
887 | struct vnode *pvp, \ | |
888 | int mode, \ | |
889 | struct ucred *cred, \ | |
890 | struct vnode **vpp))) fdesc_enotsupp) | |
b076d1ce | 891 | #define fdesc_truncate \ |
5e3f92c4 | 892 | ((int (*) __P((struct vop_truncate_args *)))fdesc_enotsupp) |
e2e9adba JSP |
893 | #define fdesc_update ((int (*) __P((struct vop_update_args *)))fdesc_enotsupp) |
894 | #define fdesc_bwrite ((int (*) __P((struct vop_bwrite_args *)))fdesc_enotsupp) | |
895 | ||
896 | int (**fdesc_vnodeop_p)(); | |
897 | struct vnodeopv_entry_desc fdesc_vnodeop_entries[] = { | |
898 | { &vop_default_desc, vn_default_error }, | |
899 | { &vop_lookup_desc, fdesc_lookup }, /* lookup */ | |
900 | { &vop_create_desc, fdesc_create }, /* create */ | |
901 | { &vop_mknod_desc, fdesc_mknod }, /* mknod */ | |
5e3f92c4 | 902 | { &vop_open_desc, fdesc_open }, /* open */ |
e2e9adba JSP |
903 | { &vop_close_desc, fdesc_close }, /* close */ |
904 | { &vop_access_desc, fdesc_access }, /* access */ | |
905 | { &vop_getattr_desc, fdesc_getattr }, /* getattr */ | |
906 | { &vop_setattr_desc, fdesc_setattr }, /* setattr */ | |
5e3f92c4 | 907 | { &vop_read_desc, fdesc_read }, /* read */ |
e2e9adba JSP |
908 | { &vop_write_desc, fdesc_write }, /* write */ |
909 | { &vop_ioctl_desc, fdesc_ioctl }, /* ioctl */ | |
910 | { &vop_select_desc, fdesc_select }, /* select */ | |
5e3f92c4 | 911 | { &vop_mmap_desc, fdesc_mmap }, /* mmap */ |
e2e9adba | 912 | { &vop_fsync_desc, fdesc_fsync }, /* fsync */ |
5e3f92c4 | 913 | { &vop_seek_desc, fdesc_seek }, /* seek */ |
e2e9adba | 914 | { &vop_remove_desc, fdesc_remove }, /* remove */ |
5e3f92c4 | 915 | { &vop_link_desc, fdesc_link }, /* link */ |
e2e9adba JSP |
916 | { &vop_rename_desc, fdesc_rename }, /* rename */ |
917 | { &vop_mkdir_desc, fdesc_mkdir }, /* mkdir */ | |
918 | { &vop_rmdir_desc, fdesc_rmdir }, /* rmdir */ | |
919 | { &vop_symlink_desc, fdesc_symlink }, /* symlink */ | |
920 | { &vop_readdir_desc, fdesc_readdir }, /* readdir */ | |
921 | { &vop_readlink_desc, fdesc_readlink }, /* readlink */ | |
922 | { &vop_abortop_desc, fdesc_abortop }, /* abortop */ | |
923 | { &vop_inactive_desc, fdesc_inactive }, /* inactive */ | |
924 | { &vop_reclaim_desc, fdesc_reclaim }, /* reclaim */ | |
5e3f92c4 | 925 | { &vop_lock_desc, fdesc_lock }, /* lock */ |
e2e9adba | 926 | { &vop_unlock_desc, fdesc_unlock }, /* unlock */ |
5e3f92c4 | 927 | { &vop_bmap_desc, fdesc_bmap }, /* bmap */ |
e2e9adba JSP |
928 | { &vop_strategy_desc, fdesc_strategy }, /* strategy */ |
929 | { &vop_print_desc, fdesc_print }, /* print */ | |
930 | { &vop_islocked_desc, fdesc_islocked }, /* islocked */ | |
931 | { &vop_advlock_desc, fdesc_advlock }, /* advlock */ | |
932 | { &vop_blkatoff_desc, fdesc_blkatoff }, /* blkatoff */ | |
e2e9adba JSP |
933 | { &vop_valloc_desc, fdesc_valloc }, /* valloc */ |
934 | { &vop_vfree_desc, fdesc_vfree }, /* vfree */ | |
935 | { &vop_truncate_desc, fdesc_truncate }, /* truncate */ | |
936 | { &vop_update_desc, fdesc_update }, /* update */ | |
937 | { &vop_bwrite_desc, fdesc_bwrite }, /* bwrite */ | |
938 | { (struct vnodeop_desc*)NULL, (int(*)())NULL } | |
939 | }; | |
940 | struct vnodeopv_desc fdesc_vnodeop_opv_desc = | |
941 | { &fdesc_vnodeop_p, fdesc_vnodeop_entries }; |