Annotation of src/sys/miscfs/fdesc/fdesc_vnops.c, Revision 1.27
1.27 ! mycroft 1: /* $NetBSD: fdesc_vnops.c,v 1.26 1995/10/09 14:03:32 mycroft Exp $ */
1.15 cgd 2:
1.1 cgd 3: /*
1.14 mycroft 4: * Copyright (c) 1992, 1993
5: * The Regents of the University of California. All rights reserved.
1.1 cgd 6: *
1.8 cgd 7: * This code is derived from software donated to Berkeley by
1.1 cgd 8: * Jan-Simon Pendry.
9: *
1.2 cgd 10: * Redistribution and use in source and binary forms, with or without
11: * modification, are permitted provided that the following conditions
12: * are met:
13: * 1. Redistributions of source code must retain the above copyright
14: * notice, this list of conditions and the following disclaimer.
15: * 2. Redistributions in binary form must reproduce the above copyright
16: * notice, this list of conditions and the following disclaimer in the
17: * documentation and/or other materials provided with the distribution.
18: * 3. All advertising materials mentioning features or use of this software
19: * must display the following acknowledgement:
1.8 cgd 20: * This product includes software developed by the University of
21: * California, Berkeley and its contributors.
1.2 cgd 22: * 4. Neither the name of the University nor the names of its contributors
23: * may be used to endorse or promote products derived from this software
24: * without specific prior written permission.
1.1 cgd 25: *
1.2 cgd 26: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
27: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36: * SUCH DAMAGE.
1.1 cgd 37: *
1.22 mycroft 38: * @(#)fdesc_vnops.c 8.12 (Berkeley) 8/20/94
39: *
40: * #Id: fdesc_vnops.c,v 1.12 1993/04/06 16:17:17 jsp Exp #
1.1 cgd 41: */
42:
43: /*
44: * /dev/fd Filesystem
45: */
46:
1.8 cgd 47: #include <sys/param.h>
48: #include <sys/systm.h>
49: #include <sys/types.h>
50: #include <sys/time.h>
51: #include <sys/proc.h>
52: #include <sys/kernel.h> /* boottime */
53: #include <sys/resourcevar.h>
54: #include <sys/filedesc.h>
55: #include <sys/vnode.h>
1.14 mycroft 56: #include <sys/malloc.h>
1.8 cgd 57: #include <sys/file.h>
58: #include <sys/stat.h>
59: #include <sys/mount.h>
60: #include <sys/namei.h>
61: #include <sys/buf.h>
1.14 mycroft 62: #include <sys/dirent.h>
1.8 cgd 63: #include <miscfs/fdesc/fdesc.h>
64:
1.14 mycroft 65: #define cttyvp(p) ((p)->p_flag & P_CONTROLT ? (p)->p_session->s_ttyvp : NULL)
1.8 cgd 66:
67: #define FDL_WANT 0x01
68: #define FDL_LOCKED 0x02
1.14 mycroft 69: static int fdcache_lock;
70:
71: dev_t devctty;
1.8 cgd 72:
73: #if (FD_STDIN != FD_STDOUT-1) || (FD_STDOUT != FD_STDERR-1)
74: FD_STDIN, FD_STDOUT, FD_STDERR must be a sequence n, n+1, n+2
75: #endif
76:
1.16 mycroft 77: #define NFDCACHE 4
1.14 mycroft 78:
1.17 mycroft 79: #define FD_NHASH(ix) \
80: (&fdhashtbl[(ix) & fdhash])
81: LIST_HEAD(fdhashhead, fdescnode) *fdhashtbl;
82: u_long fdhash;
1.14 mycroft 83:
84: /*
85: * Initialise cache headers
86: */
87: fdesc_init()
88: {
89:
90: devctty = makedev(nchrdev, 0);
1.17 mycroft 91: fdhashtbl = hashinit(NFDCACHE, M_CACHE, &fdhash);
1.14 mycroft 92: }
93:
94: int
1.8 cgd 95: fdesc_allocvp(ftype, ix, mp, vpp)
96: fdntype ftype;
97: int ix;
98: struct mount *mp;
99: struct vnode **vpp;
100: {
1.17 mycroft 101: struct fdhashhead *fc;
1.14 mycroft 102: struct fdescnode *fd;
1.8 cgd 103: int error = 0;
104:
1.17 mycroft 105: fc = FD_NHASH(ix);
1.8 cgd 106: loop:
1.17 mycroft 107: for (fd = fc->lh_first; fd != 0; fd = fd->fd_hash.le_next) {
1.14 mycroft 108: if (fd->fd_ix == ix && fd->fd_vnode->v_mount == mp) {
109: if (vget(fd->fd_vnode, 0))
1.8 cgd 110: goto loop;
1.14 mycroft 111: *vpp = fd->fd_vnode;
1.8 cgd 112: return (error);
113: }
114: }
115:
116: /*
117: * otherwise lock the array while we call getnewvnode
118: * since that can block.
119: */
1.14 mycroft 120: if (fdcache_lock & FDL_LOCKED) {
121: fdcache_lock |= FDL_WANT;
122: sleep((caddr_t) &fdcache_lock, PINOD);
1.8 cgd 123: goto loop;
124: }
1.14 mycroft 125: fdcache_lock |= FDL_LOCKED;
1.1 cgd 126:
1.14 mycroft 127: error = getnewvnode(VT_FDESC, mp, fdesc_vnodeop_p, vpp);
1.8 cgd 128: if (error)
129: goto out;
1.14 mycroft 130: MALLOC(fd, void *, sizeof(struct fdescnode), M_TEMP, M_WAITOK);
131: (*vpp)->v_data = fd;
132: fd->fd_vnode = *vpp;
133: fd->fd_type = ftype;
134: fd->fd_fd = -1;
135: fd->fd_link = 0;
136: fd->fd_ix = ix;
1.17 mycroft 137: LIST_INSERT_HEAD(fc, fd, fd_hash);
1.8 cgd 138:
139: out:;
1.14 mycroft 140: fdcache_lock &= ~FDL_LOCKED;
1.8 cgd 141:
1.14 mycroft 142: if (fdcache_lock & FDL_WANT) {
143: fdcache_lock &= ~FDL_WANT;
144: wakeup((caddr_t) &fdcache_lock);
1.8 cgd 145: }
146:
147: return (error);
148: }
1.1 cgd 149:
150: /*
151: * vp is the current namei directory
152: * ndp is the name to locate in that directory...
153: */
1.14 mycroft 154: int
155: fdesc_lookup(ap)
156: struct vop_lookup_args /* {
157: struct vnode * a_dvp;
158: struct vnode ** a_vpp;
159: struct componentname * a_cnp;
160: } */ *ap;
161: {
162: struct vnode **vpp = ap->a_vpp;
163: struct vnode *dvp = ap->a_dvp;
164: char *pname;
1.1 cgd 165: struct proc *p;
1.14 mycroft 166: int nfiles;
1.1 cgd 167: unsigned fd;
168: int error;
169: struct vnode *fvp;
1.8 cgd 170: char *ln;
1.1 cgd 171:
1.14 mycroft 172: pname = ap->a_cnp->cn_nameptr;
173: if (ap->a_cnp->cn_namelen == 1 && *pname == '.') {
174: *vpp = dvp;
175: VREF(dvp);
1.8 cgd 176: VOP_LOCK(dvp);
1.1 cgd 177: return (0);
178: }
179:
1.14 mycroft 180: p = ap->a_cnp->cn_proc;
181: nfiles = p->p_fd->fd_nfiles;
182:
1.8 cgd 183: switch (VTOFDESC(dvp)->fd_type) {
184: default:
185: case Flink:
186: case Fdesc:
187: case Fctty:
188: error = ENOTDIR;
189: goto bad;
190:
191: case Froot:
1.14 mycroft 192: if (ap->a_cnp->cn_namelen == 2 && bcmp(pname, "fd", 2) == 0) {
1.8 cgd 193: error = fdesc_allocvp(Fdevfd, FD_DEVFD, dvp->v_mount, &fvp);
194: if (error)
195: goto bad;
1.14 mycroft 196: *vpp = fvp;
1.8 cgd 197: fvp->v_type = VDIR;
198: VOP_LOCK(fvp);
199: return (0);
200: }
201:
1.14 mycroft 202: if (ap->a_cnp->cn_namelen == 3 && bcmp(pname, "tty", 3) == 0) {
1.8 cgd 203: struct vnode *ttyvp = cttyvp(p);
204: if (ttyvp == NULL) {
205: error = ENXIO;
206: goto bad;
207: }
208: error = fdesc_allocvp(Fctty, FD_CTTY, dvp->v_mount, &fvp);
209: if (error)
210: goto bad;
1.14 mycroft 211: *vpp = fvp;
1.8 cgd 212: fvp->v_type = VFIFO;
213: VOP_LOCK(fvp);
214: return (0);
215: }
216:
217: ln = 0;
1.14 mycroft 218: switch (ap->a_cnp->cn_namelen) {
1.8 cgd 219: case 5:
220: if (bcmp(pname, "stdin", 5) == 0) {
221: ln = "fd/0";
222: fd = FD_STDIN;
223: }
1.1 cgd 224: break;
1.8 cgd 225: case 6:
226: if (bcmp(pname, "stdout", 6) == 0) {
227: ln = "fd/1";
228: fd = FD_STDOUT;
229: } else
230: if (bcmp(pname, "stderr", 6) == 0) {
231: ln = "fd/2";
232: fd = FD_STDERR;
233: }
234: break;
235: }
236:
237: if (ln) {
238: error = fdesc_allocvp(Flink, fd, dvp->v_mount, &fvp);
239: if (error)
240: goto bad;
241: VTOFDESC(fvp)->fd_link = ln;
1.14 mycroft 242: *vpp = fvp;
1.8 cgd 243: fvp->v_type = VLNK;
244: VOP_LOCK(fvp);
245: return (0);
246: } else {
247: error = ENOENT;
248: goto bad;
249: }
250:
1.14 mycroft 251: /* FALL THROUGH */
1.8 cgd 252:
253: case Fdevfd:
1.14 mycroft 254: if (ap->a_cnp->cn_namelen == 2 && bcmp(pname, "..", 2) == 0) {
255: error = fdesc_root(dvp->v_mount, vpp);
1.8 cgd 256: return (error);
257: }
258:
259: fd = 0;
260: while (*pname >= '0' && *pname <= '9') {
261: fd = 10 * fd + *pname++ - '0';
262: if (fd >= nfiles)
263: break;
264: }
1.1 cgd 265:
1.8 cgd 266: if (*pname != '\0') {
267: error = ENOENT;
268: goto bad;
269: }
1.1 cgd 270:
1.8 cgd 271: if (fd >= nfiles || p->p_fd->fd_ofiles[fd] == NULL) {
272: error = EBADF;
273: goto bad;
274: }
1.1 cgd 275:
1.8 cgd 276: error = fdesc_allocvp(Fdesc, FD_DESC+fd, dvp->v_mount, &fvp);
277: if (error)
278: goto bad;
279: VTOFDESC(fvp)->fd_fd = fd;
1.14 mycroft 280: *vpp = fvp;
1.8 cgd 281: return (0);
282: }
1.1 cgd 283:
284: bad:;
1.14 mycroft 285: *vpp = NULL;
1.1 cgd 286: return (error);
287: }
288:
1.14 mycroft 289: int
290: fdesc_open(ap)
291: struct vop_open_args /* {
292: struct vnode *a_vp;
293: int a_mode;
294: struct ucred *a_cred;
295: struct proc *a_p;
296: } */ *ap;
1.1 cgd 297: {
1.14 mycroft 298: struct vnode *vp = ap->a_vp;
1.8 cgd 299:
300: switch (VTOFDESC(vp)->fd_type) {
301: case Fdesc:
1.23 mycroft 302: /*
303: * XXX Kludge: set p->p_dupfd to contain the value of the
304: * the file descriptor being sought for duplication. The error
305: * return ensures that the vnode for this device will be
306: * released by vn_open. Open will detect this special error and
307: * take the actions in dupfdopen. Other callers of vn_open or
308: * VOP_OPEN will simply report the error.
309: */
310: ap->a_p->p_dupfd = VTOFDESC(vp)->fd_fd; /* XXX */
311: return (ENODEV);
1.1 cgd 312:
1.8 cgd 313: case Fctty:
1.21 mycroft 314: return (cttyopen(devctty, ap->a_mode, 0, ap->a_p));
1.8 cgd 315: }
1.1 cgd 316:
1.21 mycroft 317: return (0);
1.1 cgd 318: }
319:
320: static int
321: fdesc_attr(fd, vap, cred, p)
322: int fd;
323: struct vattr *vap;
324: struct ucred *cred;
325: struct proc *p;
326: {
327: struct filedesc *fdp = p->p_fd;
328: struct file *fp;
1.8 cgd 329: struct stat stb;
1.1 cgd 330: int error;
331:
1.14 mycroft 332: if (fd >= fdp->fd_nfiles || (fp = fdp->fd_ofiles[fd]) == NULL)
1.1 cgd 333: return (EBADF);
334:
335: switch (fp->f_type) {
336: case DTYPE_VNODE:
337: error = VOP_GETATTR((struct vnode *) fp->f_data, vap, cred, p);
1.8 cgd 338: if (error == 0 && vap->va_type == VDIR) {
339: /*
1.22 mycroft 340: * directories can cause loops in the namespace,
341: * so turn off the 'x' bits to avoid trouble.
1.8 cgd 342: */
1.22 mycroft 343: vap->va_mode &= ~((VEXEC)|(VEXEC>>3)|(VEXEC>>6));
1.8 cgd 344: }
1.1 cgd 345: break;
346:
347: case DTYPE_SOCKET:
1.8 cgd 348: error = soo_stat((struct socket *)fp->f_data, &stb);
349: if (error == 0) {
350: vattr_null(vap);
351: vap->va_type = VSOCK;
352: vap->va_mode = stb.st_mode;
353: vap->va_nlink = stb.st_nlink;
354: vap->va_uid = stb.st_uid;
355: vap->va_gid = stb.st_gid;
356: vap->va_fsid = stb.st_dev;
357: vap->va_fileid = stb.st_ino;
358: vap->va_size = stb.st_size;
359: vap->va_blocksize = stb.st_blksize;
1.12 cgd 360: vap->va_atime = stb.st_atimespec;
361: vap->va_mtime = stb.st_mtimespec;
362: vap->va_ctime = stb.st_ctimespec;
1.8 cgd 363: vap->va_gen = stb.st_gen;
364: vap->va_flags = stb.st_flags;
365: vap->va_rdev = stb.st_rdev;
366: vap->va_bytes = stb.st_blocks * stb.st_blksize;
367: }
1.1 cgd 368: break;
369:
370: default:
371: panic("fdesc attr");
372: break;
373: }
374:
375: return (error);
376: }
377:
1.14 mycroft 378: int
379: fdesc_getattr(ap)
380: struct vop_getattr_args /* {
381: struct vnode *a_vp;
382: struct vattr *a_vap;
383: struct ucred *a_cred;
384: struct proc *a_p;
385: } */ *ap;
1.1 cgd 386: {
1.14 mycroft 387: struct vnode *vp = ap->a_vp;
388: struct vattr *vap = ap->a_vap;
1.1 cgd 389: unsigned fd;
1.8 cgd 390: int error = 0;
1.1 cgd 391:
1.8 cgd 392: switch (VTOFDESC(vp)->fd_type) {
393: case Froot:
394: case Fdevfd:
395: case Flink:
396: case Fctty:
1.1 cgd 397: bzero((caddr_t) vap, sizeof(*vap));
398: vattr_null(vap);
1.8 cgd 399: vap->va_fileid = VTOFDESC(vp)->fd_ix;
400:
401: switch (VTOFDESC(vp)->fd_type) {
402: case Flink:
403: vap->va_mode = S_IRUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH;
404: vap->va_type = VLNK;
405: vap->va_nlink = 1;
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_size = 0;
414: break;
415:
416: default:
417: vap->va_mode = S_IRUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH;
418: vap->va_type = VDIR;
419: vap->va_nlink = 2;
420: vap->va_size = DEV_BSIZE;
421: break;
422: }
1.1 cgd 423: vap->va_uid = 0;
424: vap->va_gid = 0;
425: vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0];
426: vap->va_blocksize = DEV_BSIZE;
1.14 mycroft 427: vap->va_atime.ts_sec = boottime.tv_sec;
428: vap->va_atime.ts_nsec = 0;
1.1 cgd 429: vap->va_mtime = vap->va_atime;
1.14 mycroft 430: vap->va_ctime = vap->va_mtime;
1.1 cgd 431: vap->va_gen = 0;
432: vap->va_flags = 0;
433: vap->va_rdev = 0;
434: vap->va_bytes = 0;
1.8 cgd 435: break;
436:
437: case Fdesc:
438: fd = VTOFDESC(vp)->fd_fd;
1.14 mycroft 439: error = fdesc_attr(fd, vap, ap->a_cred, ap->a_p);
1.8 cgd 440: break;
441:
442: default:
443: panic("fdesc_getattr");
444: break;
1.1 cgd 445: }
446:
447: if (error == 0)
448: vp->v_type = vap->va_type;
1.8 cgd 449:
1.1 cgd 450: return (error);
451: }
452:
1.14 mycroft 453: int
454: fdesc_setattr(ap)
455: struct vop_setattr_args /* {
456: struct vnode *a_vp;
457: struct vattr *a_vap;
458: struct ucred *a_cred;
459: struct proc *a_p;
460: } */ *ap;
1.1 cgd 461: {
1.14 mycroft 462: struct filedesc *fdp = ap->a_p->p_fd;
1.1 cgd 463: struct file *fp;
464: unsigned fd;
465: int error;
466:
467: /*
468: * Can't mess with the root vnode
469: */
1.14 mycroft 470: switch (VTOFDESC(ap->a_vp)->fd_type) {
1.8 cgd 471: case Fdesc:
472: break;
473:
474: case Fctty:
475: return (0);
476:
477: default:
1.1 cgd 478: return (EACCES);
1.8 cgd 479: }
1.1 cgd 480:
1.14 mycroft 481: fd = VTOFDESC(ap->a_vp)->fd_fd;
1.1 cgd 482: if (fd >= fdp->fd_nfiles || (fp = fdp->fd_ofiles[fd]) == NULL) {
483: return (EBADF);
484: }
485:
486: /*
487: * Can setattr the underlying vnode, but not sockets!
488: */
489: switch (fp->f_type) {
490: case DTYPE_VNODE:
1.14 mycroft 491: error = VOP_SETATTR((struct vnode *) fp->f_data, ap->a_vap, ap->a_cred, ap->a_p);
1.1 cgd 492: break;
493:
494: case DTYPE_SOCKET:
1.14 mycroft 495: error = 0;
1.1 cgd 496: break;
497:
498: default:
499: panic("fdesc setattr");
500: break;
501: }
502:
503: return (error);
504: }
505:
1.25 mycroft 506: #define UIO_MX 32
1.8 cgd 507:
1.25 mycroft 508: struct fdesc_target {
509: ino_t ft_fileno;
510: u_char ft_type;
511: u_char ft_namlen;
512: char *ft_name;
513: } fdesc_targets[] = {
514: /* NOTE: The name must be less than UIO_MX-16 chars in length */
515: #define N(s) sizeof(s)-1, s
516: { FD_DEVFD, DT_DIR, N("fd") },
1.27 ! mycroft 517: { FD_STDIN, DT_LNK, N("stdin") },
! 518: { FD_STDOUT, DT_LNK, N("stdout") },
! 519: { FD_STDERR, DT_LNK, N("stderr") },
1.25 mycroft 520: { FD_CTTY, DT_UNKNOWN, N("tty") },
521: #undef N
1.8 cgd 522: };
1.25 mycroft 523: static int nfdesc_targets = sizeof(fdesc_targets) / sizeof(fdesc_targets[0]);
1.8 cgd 524:
1.14 mycroft 525: int
526: fdesc_readdir(ap)
527: struct vop_readdir_args /* {
528: struct vnode *a_vp;
529: struct uio *a_uio;
530: struct ucred *a_cred;
1.22 mycroft 531: int *a_eofflag;
532: u_long *a_cookies;
533: int a_ncookies;
1.14 mycroft 534: } */ *ap;
1.1 cgd 535: {
1.14 mycroft 536: struct uio *uio = ap->a_uio;
1.25 mycroft 537: struct dirent d;
1.1 cgd 538: struct filedesc *fdp;
1.8 cgd 539: int i;
1.1 cgd 540: int error;
1.25 mycroft 541: u_long *cookies = ap->a_cookies;
542: int ncookies = ap->a_ncookies;
1.11 ws 543:
1.14 mycroft 544: switch (VTOFDESC(ap->a_vp)->fd_type) {
1.8 cgd 545: case Fctty:
546: return (0);
547:
548: case Fdesc:
549: return (ENOTDIR);
550: }
1.1 cgd 551:
552: fdp = uio->uio_procp->p_fd;
1.8 cgd 553:
1.25 mycroft 554: if (uio->uio_resid < UIO_MX)
555: return (EINVAL);
1.26 mycroft 556: if (uio->uio_offset < 0)
1.25 mycroft 557: return (EINVAL);
558:
559: error = 0;
1.26 mycroft 560: i = uio->uio_offset;
1.25 mycroft 561: bzero((caddr_t)&d, UIO_MX);
562: d.d_reclen = UIO_MX;
563:
1.14 mycroft 564: if (VTOFDESC(ap->a_vp)->fd_type == Froot) {
1.25 mycroft 565: struct fdesc_target *ft;
1.3 cgd 566:
1.25 mycroft 567: for (ft = &fdesc_targets[i];
568: uio->uio_resid >= UIO_MX && i < nfdesc_targets; ft++, i++) {
569: switch (ft->ft_fileno) {
1.8 cgd 570: case FD_CTTY:
571: if (cttyvp(uio->uio_procp) == NULL)
572: continue;
573: break;
574:
575: case FD_STDIN:
576: case FD_STDOUT:
577: case FD_STDERR:
1.25 mycroft 578: if ((ft->ft_fileno - FD_STDIN) >= fdp->fd_nfiles)
1.8 cgd 579: continue;
1.25 mycroft 580: if (fdp->fd_ofiles[ft->ft_fileno - FD_STDIN] == NULL)
1.8 cgd 581: continue;
582: break;
583: }
1.25 mycroft 584:
585: d.d_fileno = ft->ft_fileno;
586: d.d_namlen = ft->ft_namlen;
587: bcopy(ft->ft_name, d.d_name, ft->ft_namlen + 1);
588: d.d_type = ft->ft_type;
589:
590: if (error = uiomove((caddr_t)&d, UIO_MX, uio))
1.8 cgd 591: break;
1.25 mycroft 592: if (ncookies-- > 0)
1.26 mycroft 593: *cookies++ = i + 1;
1.3 cgd 594: }
1.25 mycroft 595: } else {
596: for (; i - 2 < fdp->fd_nfiles && uio->uio_resid >= UIO_MX;
597: i++) {
598: switch (i) {
599: case 0:
600: case 1:
601: d.d_fileno = FD_ROOT; /* XXX */
602: d.d_namlen = i + 1;
603: bcopy("..", d.d_name, d.d_namlen);
604: d.d_name[i + 1] = '\0';
605: d.d_type = DT_DIR;
606: break;
607:
608: default:
609: if (fdp->fd_ofiles[i - 2] == NULL)
610: continue;
611: d.d_fileno = i - 2 + FD_STDIN;
612: d.d_namlen = sprintf(d.d_name, "%d", i - 2);
613: d.d_type = DT_UNKNOWN;
614: break;
615: }
1.8 cgd 616:
1.25 mycroft 617: if (error = uiomove((caddr_t)&d, UIO_MX, uio))
1.1 cgd 618: break;
1.25 mycroft 619: if (ncookies-- > 0)
1.26 mycroft 620: *cookies++ = i + 1;
1.1 cgd 621: }
1.8 cgd 622: }
623:
1.26 mycroft 624: uio->uio_offset = i;
1.8 cgd 625: return (error);
626: }
627:
1.14 mycroft 628: int
629: fdesc_readlink(ap)
630: struct vop_readlink_args /* {
631: struct vnode *a_vp;
632: struct uio *a_uio;
633: struct ucred *a_cred;
634: } */ *ap;
1.8 cgd 635: {
1.14 mycroft 636: struct vnode *vp = ap->a_vp;
1.8 cgd 637: int error;
638:
1.14 mycroft 639: if (vp->v_type != VLNK)
640: return (EPERM);
641:
1.8 cgd 642: if (VTOFDESC(vp)->fd_type == Flink) {
643: char *ln = VTOFDESC(vp)->fd_link;
1.14 mycroft 644: error = uiomove(ln, strlen(ln), ap->a_uio);
1.8 cgd 645: } else {
646: error = EOPNOTSUPP;
647: }
648:
649: return (error);
650: }
651:
1.14 mycroft 652: int
653: fdesc_read(ap)
654: struct vop_read_args /* {
655: struct vnode *a_vp;
656: struct uio *a_uio;
657: int a_ioflag;
658: struct ucred *a_cred;
659: } */ *ap;
1.8 cgd 660: {
661: int error = EOPNOTSUPP;
662:
1.14 mycroft 663: switch (VTOFDESC(ap->a_vp)->fd_type) {
1.8 cgd 664: case Fctty:
1.14 mycroft 665: error = cttyread(devctty, ap->a_uio, ap->a_ioflag);
1.8 cgd 666: break;
667:
668: default:
669: error = EOPNOTSUPP;
670: break;
671: }
672:
673: return (error);
674: }
675:
1.14 mycroft 676: int
677: fdesc_write(ap)
678: struct vop_write_args /* {
679: struct vnode *a_vp;
680: struct uio *a_uio;
681: int a_ioflag;
682: struct ucred *a_cred;
683: } */ *ap;
1.8 cgd 684: {
685: int error = EOPNOTSUPP;
686:
1.14 mycroft 687: switch (VTOFDESC(ap->a_vp)->fd_type) {
1.8 cgd 688: case Fctty:
1.14 mycroft 689: error = cttywrite(devctty, ap->a_uio, ap->a_ioflag);
1.8 cgd 690: break;
691:
692: default:
693: error = EOPNOTSUPP;
694: break;
695: }
696:
697: return (error);
698: }
699:
1.14 mycroft 700: int
701: fdesc_ioctl(ap)
702: struct vop_ioctl_args /* {
703: struct vnode *a_vp;
1.19 cgd 704: u_long a_command;
1.14 mycroft 705: caddr_t a_data;
706: int a_fflag;
707: struct ucred *a_cred;
708: struct proc *a_p;
709: } */ *ap;
1.8 cgd 710: {
711: int error = EOPNOTSUPP;
712:
1.14 mycroft 713: switch (VTOFDESC(ap->a_vp)->fd_type) {
1.8 cgd 714: case Fctty:
1.14 mycroft 715: error = cttyioctl(devctty, ap->a_command, ap->a_data,
716: ap->a_fflag, ap->a_p);
1.8 cgd 717: break;
718:
719: default:
720: error = EOPNOTSUPP;
721: break;
1.1 cgd 722: }
1.8 cgd 723:
724: return (error);
725: }
726:
1.14 mycroft 727: int
728: fdesc_select(ap)
729: struct vop_select_args /* {
730: struct vnode *a_vp;
731: int a_which;
732: int a_fflags;
733: struct ucred *a_cred;
734: struct proc *a_p;
735: } */ *ap;
1.8 cgd 736: {
737: int error = EOPNOTSUPP;
738:
1.14 mycroft 739: switch (VTOFDESC(ap->a_vp)->fd_type) {
1.8 cgd 740: case Fctty:
1.14 mycroft 741: error = cttyselect(devctty, ap->a_fflags, ap->a_p);
1.8 cgd 742: break;
1.1 cgd 743:
1.8 cgd 744: default:
745: error = EOPNOTSUPP;
746: break;
747: }
748:
1.1 cgd 749: return (error);
750: }
751:
1.14 mycroft 752: int
753: fdesc_inactive(ap)
754: struct vop_inactive_args /* {
755: struct vnode *a_vp;
756: } */ *ap;
1.1 cgd 757: {
1.14 mycroft 758: struct vnode *vp = ap->a_vp;
759:
1.1 cgd 760: /*
761: * Clear out the v_type field to avoid
762: * nasty things happening in vgone().
763: */
764: vp->v_type = VNON;
765: return (0);
766: }
767:
1.14 mycroft 768: int
769: fdesc_reclaim(ap)
770: struct vop_reclaim_args /* {
771: struct vnode *a_vp;
772: } */ *ap;
773: {
774: struct vnode *vp = ap->a_vp;
1.17 mycroft 775: struct fdescnode *fd = VTOFDESC(vp);
1.14 mycroft 776:
1.17 mycroft 777: LIST_REMOVE(fd, fd_hash);
1.14 mycroft 778: FREE(vp->v_data, M_TEMP);
779: vp->v_data = 0;
780:
781: return (0);
782: }
783:
784: /*
785: * Return POSIX pathconf information applicable to special devices.
786: */
787: fdesc_pathconf(ap)
788: struct vop_pathconf_args /* {
789: struct vnode *a_vp;
790: int a_name;
1.18 cgd 791: register_t *a_retval;
1.14 mycroft 792: } */ *ap;
1.8 cgd 793: {
794:
1.14 mycroft 795: switch (ap->a_name) {
796: case _PC_LINK_MAX:
797: *ap->a_retval = LINK_MAX;
798: return (0);
799: case _PC_MAX_CANON:
800: *ap->a_retval = MAX_CANON;
801: return (0);
802: case _PC_MAX_INPUT:
803: *ap->a_retval = MAX_INPUT;
804: return (0);
805: case _PC_PIPE_BUF:
806: *ap->a_retval = PIPE_BUF;
807: return (0);
808: case _PC_CHOWN_RESTRICTED:
809: *ap->a_retval = 1;
810: return (0);
811: case _PC_VDISABLE:
812: *ap->a_retval = _POSIX_VDISABLE;
813: return (0);
814: default:
815: return (EINVAL);
1.8 cgd 816: }
1.14 mycroft 817: /* NOTREACHED */
1.8 cgd 818: }
819:
1.1 cgd 820: /*
821: * Print out the contents of a /dev/fd vnode.
822: */
823: /* ARGSUSED */
1.14 mycroft 824: int
825: fdesc_print(ap)
826: struct vop_print_args /* {
827: struct vnode *a_vp;
828: } */ *ap;
1.1 cgd 829: {
1.14 mycroft 830:
1.8 cgd 831: printf("tag VT_NON, fdesc vnode\n");
1.14 mycroft 832: return (0);
833: }
834:
835: /*void*/
836: int
837: fdesc_vfree(ap)
838: struct vop_vfree_args /* {
839: struct vnode *a_pvp;
840: ino_t a_ino;
841: int a_mode;
842: } */ *ap;
843: {
844:
845: return (0);
1.1 cgd 846: }
847:
848: /*
849: * /dev/fd vnode unsupported operation
850: */
1.14 mycroft 851: int
1.1 cgd 852: fdesc_enotsupp()
853: {
1.14 mycroft 854:
1.1 cgd 855: return (EOPNOTSUPP);
856: }
857:
858: /*
859: * /dev/fd "should never get here" operation
860: */
1.14 mycroft 861: int
1.1 cgd 862: fdesc_badop()
863: {
1.14 mycroft 864:
1.1 cgd 865: panic("fdesc: bad op");
866: /* NOTREACHED */
867: }
868:
869: /*
870: * /dev/fd vnode null operation
871: */
1.14 mycroft 872: int
1.1 cgd 873: fdesc_nullop()
874: {
1.14 mycroft 875:
1.1 cgd 876: return (0);
877: }
878:
1.14 mycroft 879: #define fdesc_create ((int (*) __P((struct vop_create_args *)))fdesc_enotsupp)
880: #define fdesc_mknod ((int (*) __P((struct vop_mknod_args *)))fdesc_enotsupp)
881: #define fdesc_close ((int (*) __P((struct vop_close_args *)))nullop)
882: #define fdesc_access ((int (*) __P((struct vop_access_args *)))nullop)
883: #define fdesc_mmap ((int (*) __P((struct vop_mmap_args *)))fdesc_enotsupp)
884: #define fdesc_fsync ((int (*) __P((struct vop_fsync_args *)))nullop)
885: #define fdesc_seek ((int (*) __P((struct vop_seek_args *)))nullop)
886: #define fdesc_remove ((int (*) __P((struct vop_remove_args *)))fdesc_enotsupp)
887: #define fdesc_link ((int (*) __P((struct vop_link_args *)))fdesc_enotsupp)
888: #define fdesc_rename ((int (*) __P((struct vop_rename_args *)))fdesc_enotsupp)
889: #define fdesc_mkdir ((int (*) __P((struct vop_mkdir_args *)))fdesc_enotsupp)
890: #define fdesc_rmdir ((int (*) __P((struct vop_rmdir_args *)))fdesc_enotsupp)
891: #define fdesc_symlink ((int (*) __P((struct vop_symlink_args *)))fdesc_enotsupp)
892: #define fdesc_abortop ((int (*) __P((struct vop_abortop_args *)))nullop)
893: #define fdesc_lock ((int (*) __P((struct vop_lock_args *)))nullop)
894: #define fdesc_unlock ((int (*) __P((struct vop_unlock_args *)))nullop)
895: #define fdesc_bmap ((int (*) __P((struct vop_bmap_args *)))fdesc_badop)
896: #define fdesc_strategy ((int (*) __P((struct vop_strategy_args *)))fdesc_badop)
897: #define fdesc_islocked ((int (*) __P((struct vop_islocked_args *)))nullop)
898: #define fdesc_advlock ((int (*) __P((struct vop_advlock_args *)))fdesc_enotsupp)
899: #define fdesc_blkatoff \
900: ((int (*) __P((struct vop_blkatoff_args *)))fdesc_enotsupp)
901: #define fdesc_vget ((int (*) __P((struct vop_vget_args *)))fdesc_enotsupp)
902: #define fdesc_valloc ((int(*) __P(( \
903: struct vnode *pvp, \
1.1 cgd 904: int mode, \
905: struct ucred *cred, \
1.14 mycroft 906: struct vnode **vpp))) fdesc_enotsupp)
907: #define fdesc_truncate \
908: ((int (*) __P((struct vop_truncate_args *)))fdesc_enotsupp)
909: #define fdesc_update ((int (*) __P((struct vop_update_args *)))fdesc_enotsupp)
910: #define fdesc_bwrite ((int (*) __P((struct vop_bwrite_args *)))fdesc_enotsupp)
911:
912: int (**fdesc_vnodeop_p)();
913: struct vnodeopv_entry_desc fdesc_vnodeop_entries[] = {
914: { &vop_default_desc, vn_default_error },
915: { &vop_lookup_desc, fdesc_lookup }, /* lookup */
916: { &vop_create_desc, fdesc_create }, /* create */
917: { &vop_mknod_desc, fdesc_mknod }, /* mknod */
918: { &vop_open_desc, fdesc_open }, /* open */
919: { &vop_close_desc, fdesc_close }, /* close */
920: { &vop_access_desc, fdesc_access }, /* access */
921: { &vop_getattr_desc, fdesc_getattr }, /* getattr */
922: { &vop_setattr_desc, fdesc_setattr }, /* setattr */
923: { &vop_read_desc, fdesc_read }, /* read */
924: { &vop_write_desc, fdesc_write }, /* write */
925: { &vop_ioctl_desc, fdesc_ioctl }, /* ioctl */
926: { &vop_select_desc, fdesc_select }, /* select */
927: { &vop_mmap_desc, fdesc_mmap }, /* mmap */
928: { &vop_fsync_desc, fdesc_fsync }, /* fsync */
929: { &vop_seek_desc, fdesc_seek }, /* seek */
930: { &vop_remove_desc, fdesc_remove }, /* remove */
931: { &vop_link_desc, fdesc_link }, /* link */
932: { &vop_rename_desc, fdesc_rename }, /* rename */
933: { &vop_mkdir_desc, fdesc_mkdir }, /* mkdir */
934: { &vop_rmdir_desc, fdesc_rmdir }, /* rmdir */
935: { &vop_symlink_desc, fdesc_symlink }, /* symlink */
936: { &vop_readdir_desc, fdesc_readdir }, /* readdir */
937: { &vop_readlink_desc, fdesc_readlink }, /* readlink */
938: { &vop_abortop_desc, fdesc_abortop }, /* abortop */
939: { &vop_inactive_desc, fdesc_inactive }, /* inactive */
940: { &vop_reclaim_desc, fdesc_reclaim }, /* reclaim */
941: { &vop_lock_desc, fdesc_lock }, /* lock */
942: { &vop_unlock_desc, fdesc_unlock }, /* unlock */
943: { &vop_bmap_desc, fdesc_bmap }, /* bmap */
944: { &vop_strategy_desc, fdesc_strategy }, /* strategy */
945: { &vop_print_desc, fdesc_print }, /* print */
946: { &vop_islocked_desc, fdesc_islocked }, /* islocked */
947: { &vop_pathconf_desc, fdesc_pathconf }, /* pathconf */
948: { &vop_advlock_desc, fdesc_advlock }, /* advlock */
949: { &vop_blkatoff_desc, fdesc_blkatoff }, /* blkatoff */
950: { &vop_valloc_desc, fdesc_valloc }, /* valloc */
951: { &vop_vfree_desc, fdesc_vfree }, /* vfree */
952: { &vop_truncate_desc, fdesc_truncate }, /* truncate */
953: { &vop_update_desc, fdesc_update }, /* update */
954: { &vop_bwrite_desc, fdesc_bwrite }, /* bwrite */
955: { (struct vnodeop_desc*)NULL, (int(*)())NULL }
1.1 cgd 956: };
1.14 mycroft 957: struct vnodeopv_desc fdesc_vnodeop_opv_desc =
958: { &fdesc_vnodeop_p, fdesc_vnodeop_entries };
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