1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1980, 1989, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32 #ifndef lint
33 static const char copyright[] =
34 "@(#) Copyright (c) 1980, 1989, 1993\n\
35 The Regents of the University of California. All rights reserved.\n";
36 #endif /* not lint */
37
38 #ifndef lint
39 #if 0
40 static char sccsid[] = "@(#)umount.c 8.8 (Berkeley) 5/8/95";
41 #endif
42 #endif /* not lint */
43
44 #include <sys/param.h>
45 #include <sys/mount.h>
46 #include <sys/socket.h>
47 #include <sys/stat.h>
48
49 #include <netdb.h>
50 #include <rpc/rpc.h>
51 #include <rpcsvc/mount.h>
52 #include <nfs/nfssvc.h>
53
54 #include <ctype.h>
55 #include <err.h>
56 #include <errno.h>
57 #include <fstab.h>
58 #include <stdio.h>
59 #include <stdlib.h>
60 #include <string.h>
61 #include <unistd.h>
62
63 #include "mounttab.h"
64
65 /* used by md_detach() */
66 #include <sys/ioctl.h>
67 #include <sys/mdioctl.h>
68 #include <fcntl.h>
69 #include <paths.h>
70
71 #define DEV_MD _PATH_DEV MD_NAME
72 #define DEV_MDCTL _PATH_DEV MDCTL_NAME
73
74 typedef enum { FIND, REMOVE, CHECKUNIQUE } dowhat;
75
76 static struct addrinfo *nfshost_ai = NULL;
77 static int dflag, fflag, vflag;
78 static int all;
79 static char *nfshost;
80
81 struct statfs *checkmntlist(char *);
82 int checkvfsname (const char *, char **);
83 struct statfs *getmntentry(const char *fromname, const char *onname,
84 fsid_t *fsid, dowhat what);
85 char **makevfslist (const char *);
86 size_t mntinfo (struct statfs **);
87 int namematch (struct addrinfo *);
88 int parsehexfsid(const char *hex, fsid_t *fsid);
89 int sacmp (void *, void *);
90 int umountall (char **);
91 int checkname (char *, char **);
92 int umountfs(struct statfs *sfs);
93 void usage (void);
94 int xdr_dir (XDR *, char *);
95 int md_detach(const char *);
96
97 int
main(int argc,char * argv[])98 main(int argc, char *argv[])
99 {
100 int errs, ch, mntsize, error, nfsforce, ret;
101 char **typelist = NULL;
102 struct statfs *mntbuf, *sfs;
103 struct addrinfo hints;
104
105 nfsforce = all = errs = 0;
106 while ((ch = getopt(argc, argv, "AadF:fh:Nnt:v")) != -1)
107 switch (ch) {
108 case 'A':
109 all = 2;
110 break;
111 case 'a':
112 all = 1;
113 break;
114 case 'd':
115 dflag = 1;
116 break;
117 case 'F':
118 setfstab(optarg);
119 break;
120 case 'f':
121 fflag |= MNT_FORCE;
122 break;
123 case 'h': /* -h implies -A. */
124 all = 2;
125 nfshost = optarg;
126 break;
127 case 'N':
128 nfsforce = 1;
129 break;
130 case 'n':
131 fflag |= MNT_NONBUSY;
132 break;
133 case 't':
134 if (typelist != NULL)
135 err(1, "only one -t option may be specified");
136 typelist = makevfslist(optarg);
137 break;
138 case 'v':
139 vflag = 1;
140 break;
141 default:
142 usage();
143 /* NOTREACHED */
144 }
145 argc -= optind;
146 argv += optind;
147
148 if ((fflag & MNT_FORCE) != 0 && (fflag & MNT_NONBUSY) != 0)
149 err(1, "-f and -n are mutually exclusive");
150
151 if ((argc == 0 && !all) || (argc != 0 && all))
152 usage();
153
154 if (nfsforce != 0 && (argc == 0 || nfshost != NULL || typelist != NULL))
155 usage();
156
157 /* -h implies "-t nfs" if no -t flag. */
158 if ((nfshost != NULL) && (typelist == NULL))
159 typelist = makevfslist("nfs");
160
161 if (nfshost != NULL) {
162 memset(&hints, 0, sizeof hints);
163 error = getaddrinfo(nfshost, NULL, &hints, &nfshost_ai);
164 if (error)
165 errx(1, "%s: %s", nfshost, gai_strerror(error));
166 }
167
168 switch (all) {
169 case 2:
170 if ((mntsize = mntinfo(&mntbuf)) <= 0)
171 break;
172 /*
173 * We unmount the nfs-mounts in the reverse order
174 * that they were mounted.
175 */
176 for (errs = 0, mntsize--; mntsize > 0; mntsize--) {
177 sfs = &mntbuf[mntsize];
178 if (checkvfsname(sfs->f_fstypename, typelist))
179 continue;
180 if (strcmp(sfs->f_mntonname, "/dev") == 0)
181 continue;
182 if (umountfs(sfs) != 0)
183 errs = 1;
184 }
185 free(mntbuf);
186 break;
187 case 1:
188 if (setfsent() == 0)
189 err(1, "%s", getfstab());
190 errs = umountall(typelist);
191 break;
192 case 0:
193 for (errs = 0; *argv != NULL; ++argv)
194 if (nfsforce != 0) {
195 /*
196 * First do the nfssvc() syscall to shut down
197 * the mount point and then do the forced
198 * dismount.
199 */
200 ret = nfssvc(NFSSVC_FORCEDISM, *argv);
201 if (ret >= 0)
202 ret = unmount(*argv, MNT_FORCE);
203 if (ret < 0) {
204 warn("%s", *argv);
205 errs = 1;
206 }
207 } else if (checkname(*argv, typelist) != 0)
208 errs = 1;
209 break;
210 }
211 exit(errs);
212 }
213
214 int
umountall(char ** typelist)215 umountall(char **typelist)
216 {
217 struct xvfsconf vfc;
218 struct fstab *fs;
219 int rval;
220 char *cp;
221 static int firstcall = 1;
222
223 if ((fs = getfsent()) != NULL)
224 firstcall = 0;
225 else if (firstcall)
226 errx(1, "fstab reading failure");
227 else
228 return (0);
229 do {
230 /* Ignore the root. */
231 if (strcmp(fs->fs_file, "/") == 0)
232 continue;
233 /*
234 * !!!
235 * Historic practice: ignore unknown FSTAB_* fields.
236 */
237 if (strcmp(fs->fs_type, FSTAB_RW) &&
238 strcmp(fs->fs_type, FSTAB_RO) &&
239 strcmp(fs->fs_type, FSTAB_RQ))
240 continue;
241 /* Ignore unknown file system types. */
242 if (getvfsbyname(fs->fs_vfstype, &vfc) == -1)
243 continue;
244 if (checkvfsname(fs->fs_vfstype, typelist))
245 continue;
246
247 /*
248 * We want to unmount the file systems in the reverse order
249 * that they were mounted. So, we save off the file name
250 * in some allocated memory, and then call recursively.
251 */
252 if ((cp = malloc((size_t)strlen(fs->fs_file) + 1)) == NULL)
253 err(1, "malloc failed");
254 (void)strcpy(cp, fs->fs_file);
255 rval = umountall(typelist);
256 rval = checkname(cp, typelist) || rval;
257 free(cp);
258 return (rval);
259 } while ((fs = getfsent()) != NULL);
260 return (0);
261 }
262
263 /*
264 * Do magic checks on mountpoint/device/fsid, and then call unmount(2).
265 */
266 int
checkname(char * mntname,char ** typelist)267 checkname(char *mntname, char **typelist)
268 {
269 char buf[MAXPATHLEN];
270 struct statfs sfsbuf;
271 struct stat sb;
272 struct statfs *sfs;
273 char *delimp;
274 dev_t dev;
275 int len;
276
277 /*
278 * 1. Check if the name exists in the mounttable.
279 */
280 sfs = checkmntlist(mntname);
281 /*
282 * 2. Remove trailing slashes if there are any. After that
283 * we look up the name in the mounttable again.
284 */
285 if (sfs == NULL) {
286 len = strlen(mntname);
287 while (len > 1 && mntname[len - 1] == '/')
288 mntname[--len] = '\0';
289 sfs = checkmntlist(mntname);
290 }
291 /*
292 * 3. Check if the deprecated NFS syntax with an '@' has been used
293 * and translate it to the ':' syntax. Look up the name in the
294 * mount table again.
295 */
296 if (sfs == NULL && (delimp = strrchr(mntname, '@')) != NULL) {
297 snprintf(buf, sizeof(buf), "%s:%.*s", delimp + 1,
298 (int)(delimp - mntname), mntname);
299 len = strlen(buf);
300 while (len > 1 && buf[len - 1] == '/')
301 buf[--len] = '\0';
302 sfs = checkmntlist(buf);
303 }
304 /*
305 * 4. Resort to a statfs(2) call. This is the last check so that
306 * hung NFS filesystems for example can be unmounted without
307 * potentially blocking forever in statfs() as long as the
308 * filesystem is specified unambiguously. This covers all the
309 * hard cases such as symlinks and mismatches between the
310 * mount list and reality.
311 * We also do this if an ambiguous mount point was specified.
312 */
313 if (sfs == NULL || (getmntentry(NULL, mntname, NULL, FIND) != NULL &&
314 getmntentry(NULL, mntname, NULL, CHECKUNIQUE) == NULL)) {
315 if (statfs(mntname, &sfsbuf) != 0) {
316 warn("%s: statfs", mntname);
317 } else if (stat(mntname, &sb) != 0) {
318 warn("%s: stat", mntname);
319 } else if (S_ISDIR(sb.st_mode)) {
320 /* Check that `mntname' is the root directory. */
321 dev = sb.st_dev;
322 snprintf(buf, sizeof(buf), "%s/..", mntname);
323 if (stat(buf, &sb) != 0) {
324 warn("%s: stat", buf);
325 } else if (sb.st_dev == dev) {
326 warnx("%s: not a file system root directory",
327 mntname);
328 return (1);
329 } else
330 sfs = &sfsbuf;
331 }
332 }
333 if (sfs == NULL) {
334 warnx("%s: unknown file system", mntname);
335 return (1);
336 }
337 if (checkvfsname(sfs->f_fstypename, typelist))
338 return (1);
339 return (umountfs(sfs));
340 }
341
342 /*
343 * NFS stuff and unmount(2) call
344 */
345 int
umountfs(struct statfs * sfs)346 umountfs(struct statfs *sfs)
347 {
348 char fsidbuf[64];
349 enum clnt_stat clnt_stat;
350 struct timeval try;
351 struct addrinfo *ai, hints;
352 int do_rpc;
353 CLIENT *clp;
354 char *nfsdirname, *orignfsdirname;
355 char *hostp, *delimp;
356 char buf[1024];
357 struct nfscl_dumpmntopts dumpmntopts;
358 const char *proto_ptr = NULL;
359
360 ai = NULL;
361 do_rpc = 0;
362 hostp = NULL;
363 nfsdirname = delimp = orignfsdirname = NULL;
364 memset(&hints, 0, sizeof hints);
365
366 if (strcmp(sfs->f_fstypename, "nfs") == 0) {
367 if ((nfsdirname = strdup(sfs->f_mntfromname)) == NULL)
368 err(1, "strdup");
369 orignfsdirname = nfsdirname;
370 if (*nfsdirname == '[' &&
371 (delimp = strchr(nfsdirname + 1, ']')) != NULL &&
372 *(delimp + 1) == ':') {
373 hostp = nfsdirname + 1;
374 nfsdirname = delimp + 2;
375 } else if ((delimp = strrchr(nfsdirname, ':')) != NULL) {
376 hostp = nfsdirname;
377 nfsdirname = delimp + 1;
378 }
379 if (hostp != NULL) {
380 *delimp = '\0';
381 getaddrinfo(hostp, NULL, &hints, &ai);
382 if (ai == NULL) {
383 warnx("can't get net id for host");
384 }
385 }
386
387 /*
388 * Check if we have to start the rpc-call later.
389 * If there are still identical nfs-names mounted,
390 * we skip the rpc-call. Obviously this has to
391 * happen before unmount(2), but it should happen
392 * after the previous namecheck.
393 * A non-NULL return means that this is the last
394 * mount from mntfromname that is still mounted.
395 */
396 if (getmntentry(sfs->f_mntfromname, NULL, NULL,
397 CHECKUNIQUE) != NULL) {
398 do_rpc = 1;
399 proto_ptr = "udp";
400 /*
401 * Try and find out whether this NFS mount is NFSv4 and
402 * what protocol is being used. If this fails, the
403 * default is NFSv2,3 and use UDP for the Unmount RPC.
404 */
405 dumpmntopts.ndmnt_fname = sfs->f_mntonname;
406 dumpmntopts.ndmnt_buf = buf;
407 dumpmntopts.ndmnt_blen = sizeof(buf);
408 if (nfssvc(NFSSVC_DUMPMNTOPTS, &dumpmntopts) >= 0) {
409 if (strstr(buf, "nfsv4,") != NULL)
410 do_rpc = 0;
411 else if (strstr(buf, ",tcp,") != NULL)
412 proto_ptr = "tcp";
413 }
414 }
415 }
416
417 if (!namematch(ai)) {
418 free(orignfsdirname);
419 return (1);
420 }
421 /* First try to unmount using the file system ID. */
422 snprintf(fsidbuf, sizeof(fsidbuf), "FSID:%d:%d", sfs->f_fsid.val[0],
423 sfs->f_fsid.val[1]);
424 if (unmount(fsidbuf, fflag | MNT_BYFSID) != 0) {
425 /* XXX, non-root users get a zero fsid, so don't warn. */
426 if (errno != ENOENT || sfs->f_fsid.val[0] != 0 ||
427 sfs->f_fsid.val[1] != 0)
428 warn("unmount of %s failed", sfs->f_mntonname);
429 if (errno != ENOENT) {
430 free(orignfsdirname);
431 return (1);
432 }
433 /* Compatibility for old kernels. */
434 if (sfs->f_fsid.val[0] != 0 || sfs->f_fsid.val[1] != 0)
435 warnx("retrying using path instead of file system ID");
436 if (unmount(sfs->f_mntonname, fflag) != 0) {
437 warn("unmount of %s failed", sfs->f_mntonname);
438 free(orignfsdirname);
439 return (1);
440 }
441 }
442 /* Mark this file system as unmounted. */
443 getmntentry(NULL, NULL, &sfs->f_fsid, REMOVE);
444 if (vflag)
445 (void)printf("%s: unmount from %s\n", sfs->f_mntfromname,
446 sfs->f_mntonname);
447 /*
448 * Report to mountd-server which nfsname
449 * has been unmounted.
450 */
451 if (ai != NULL && !(fflag & MNT_FORCE) && do_rpc) {
452 clp = clnt_create(hostp, MOUNTPROG, MOUNTVERS3, proto_ptr);
453 if (clp == NULL) {
454 warnx("%s: %s", hostp,
455 clnt_spcreateerror("MOUNTPROG"));
456 free(orignfsdirname);
457 return (1);
458 }
459 clp->cl_auth = authsys_create_default();
460 try.tv_sec = 20;
461 try.tv_usec = 0;
462 clnt_stat = clnt_call(clp, MOUNTPROC_UMNT, (xdrproc_t)xdr_dir,
463 nfsdirname, (xdrproc_t)xdr_void, (caddr_t)0, try);
464 if (clnt_stat != RPC_SUCCESS) {
465 warnx("%s: %s", hostp,
466 clnt_sperror(clp, "RPCMNT_UMOUNT"));
467 free(orignfsdirname);
468 return (1);
469 }
470 /*
471 * Remove the unmounted entry from /var/db/mounttab.
472 */
473 if (read_mtab()) {
474 clean_mtab(hostp, nfsdirname, vflag);
475 if(!write_mtab(vflag))
476 warnx("cannot remove mounttab entry %s:%s",
477 hostp, nfsdirname);
478 free_mtab();
479 }
480 auth_destroy(clp->cl_auth);
481 clnt_destroy(clp);
482 }
483 free(orignfsdirname);
484
485 if (dflag) {
486 if (md_detach(sfs->f_mntfromname) == 0) {
487 if (vflag)
488 (void)printf("%s: detached\n",
489 sfs->f_mntfromname);
490 } else if (!all)
491 return (-1);
492 }
493
494 return (0);
495 }
496
497 struct statfs *
getmntentry(const char * fromname,const char * onname,fsid_t * fsid,dowhat what)498 getmntentry(const char *fromname, const char *onname, fsid_t *fsid, dowhat what)
499 {
500 static struct statfs *mntbuf;
501 static size_t mntsize = 0;
502 static int *mntcheck = NULL;
503 struct statfs *sfs, *foundsfs;
504 int i, count;
505
506 if (mntsize <= 0) {
507 if ((mntsize = mntinfo(&mntbuf)) <= 0)
508 return (NULL);
509 }
510 if (mntcheck == NULL) {
511 if ((mntcheck = calloc(mntsize + 1, sizeof(int))) == NULL)
512 err(1, "calloc");
513 }
514 /*
515 * We want to get the file systems in the reverse order
516 * that they were mounted. Unmounted file systems are marked
517 * in a table called 'mntcheck'.
518 */
519 count = 0;
520 foundsfs = NULL;
521 for (i = mntsize - 1; i >= 0; i--) {
522 if (mntcheck[i])
523 continue;
524 sfs = &mntbuf[i];
525 if (fromname != NULL && strcmp(sfs->f_mntfromname,
526 fromname) != 0)
527 continue;
528 if (onname != NULL && strcmp(sfs->f_mntonname, onname) != 0)
529 continue;
530 if (fsid != NULL && fsidcmp(&sfs->f_fsid, fsid) != 0)
531 continue;
532
533 switch (what) {
534 case CHECKUNIQUE:
535 foundsfs = sfs;
536 count++;
537 continue;
538 case REMOVE:
539 mntcheck[i] = 1;
540 break;
541 default:
542 break;
543 }
544 return (sfs);
545 }
546
547 if (what == CHECKUNIQUE && count == 1)
548 return (foundsfs);
549 return (NULL);
550 }
551
552 int
sacmp(void * sa1,void * sa2)553 sacmp(void *sa1, void *sa2)
554 {
555 void *p1, *p2;
556 int len;
557
558 if (((struct sockaddr *)sa1)->sa_family !=
559 ((struct sockaddr *)sa2)->sa_family)
560 return (1);
561
562 switch (((struct sockaddr *)sa1)->sa_family) {
563 case AF_INET:
564 p1 = &((struct sockaddr_in *)sa1)->sin_addr;
565 p2 = &((struct sockaddr_in *)sa2)->sin_addr;
566 len = 4;
567 break;
568 case AF_INET6:
569 p1 = &((struct sockaddr_in6 *)sa1)->sin6_addr;
570 p2 = &((struct sockaddr_in6 *)sa2)->sin6_addr;
571 len = 16;
572 if (((struct sockaddr_in6 *)sa1)->sin6_scope_id !=
573 ((struct sockaddr_in6 *)sa2)->sin6_scope_id)
574 return (1);
575 break;
576 default:
577 return (1);
578 }
579
580 return memcmp(p1, p2, len);
581 }
582
583 int
namematch(struct addrinfo * ai)584 namematch(struct addrinfo *ai)
585 {
586 struct addrinfo *aip;
587
588 if (nfshost == NULL || nfshost_ai == NULL)
589 return (1);
590
591 while (ai != NULL) {
592 aip = nfshost_ai;
593 while (aip != NULL) {
594 if (sacmp(ai->ai_addr, aip->ai_addr) == 0)
595 return (1);
596 aip = aip->ai_next;
597 }
598 ai = ai->ai_next;
599 }
600
601 return (0);
602 }
603
604 struct statfs *
checkmntlist(char * mntname)605 checkmntlist(char *mntname)
606 {
607 struct statfs *sfs;
608 fsid_t fsid;
609
610 sfs = NULL;
611 if (parsehexfsid(mntname, &fsid) == 0)
612 sfs = getmntentry(NULL, NULL, &fsid, FIND);
613 if (sfs == NULL)
614 sfs = getmntentry(NULL, mntname, NULL, FIND);
615 if (sfs == NULL)
616 sfs = getmntentry(mntname, NULL, NULL, FIND);
617 return (sfs);
618 }
619
620 size_t
mntinfo(struct statfs ** mntbuf)621 mntinfo(struct statfs **mntbuf)
622 {
623 static struct statfs *origbuf;
624 size_t bufsize;
625 int mntsize;
626
627 mntsize = getfsstat(NULL, 0, MNT_NOWAIT);
628 if (mntsize <= 0)
629 return (0);
630 bufsize = (mntsize + 1) * sizeof(struct statfs);
631 if ((origbuf = malloc(bufsize)) == NULL)
632 err(1, "malloc");
633 mntsize = getfsstat(origbuf, (long)bufsize, MNT_NOWAIT);
634 *mntbuf = origbuf;
635 return (mntsize);
636 }
637
638 /*
639 * Convert a hexadecimal filesystem ID to an fsid_t.
640 * Returns 0 on success.
641 */
642 int
parsehexfsid(const char * hex,fsid_t * fsid)643 parsehexfsid(const char *hex, fsid_t *fsid)
644 {
645 char hexbuf[3];
646 int i;
647
648 if (strlen(hex) != sizeof(*fsid) * 2)
649 return (-1);
650 hexbuf[2] = '\0';
651 for (i = 0; i < (int)sizeof(*fsid); i++) {
652 hexbuf[0] = hex[i * 2];
653 hexbuf[1] = hex[i * 2 + 1];
654 if (!isxdigit(hexbuf[0]) || !isxdigit(hexbuf[1]))
655 return (-1);
656 ((u_char *)fsid)[i] = strtol(hexbuf, NULL, 16);
657 }
658 return (0);
659 }
660
661 /*
662 * xdr routines for mount rpc's
663 */
664 int
xdr_dir(XDR * xdrsp,char * dirp)665 xdr_dir(XDR *xdrsp, char *dirp)
666 {
667
668 return (xdr_string(xdrsp, &dirp, MNTPATHLEN));
669 }
670
671 void
usage(void)672 usage(void)
673 {
674
675 (void)fprintf(stderr, "%s\n%s\n",
676 "usage: umount [-dfNnv] special ... | node ... | fsid ...",
677 " umount -a | -A [-F fstab] [-dfnv] [-h host] [-t type]");
678 exit(1);
679 }
680
681 int
md_detach(const char * device)682 md_detach(const char *device)
683 {
684 struct md_ioctl mdio;
685 char *eptr;
686 int fd;
687
688 if (strncmp(device, DEV_MD, sizeof(DEV_MD) - 1)) {
689 if (!all)
690 warnx("invalid md device: %s", device);
691 return (-1);
692 }
693
694 memset(&mdio, 0, sizeof(mdio));
695 mdio.md_version = MDIOVERSION;
696 mdio.md_options = fflag ? MD_FORCE : 0;
697 mdio.md_unit = strtoul(device + sizeof(DEV_MD) - 1, &eptr, 0);
698 if (mdio.md_unit == (unsigned)ULONG_MAX || eptr - device == sizeof(DEV_MD) - 1) {
699 warnx("invalid md device: %s", device);
700 return (-1);
701 }
702
703 fd = open(DEV_MDCTL, O_RDWR, 0);
704 if (fd < 0) {
705 warn("%s", DEV_MDCTL);
706 return (-1);
707 }
708
709 if (ioctl(fd, MDIOCDETACH, &mdio) < 0) {
710 warn("%s", DEV_MD);
711 close(fd);
712 return (-1);
713 }
714
715 close(fd);
716 return (0);
717 }
718