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Commit | Line | Data |
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6dbe3af9 KZ |
1 | /* |
2 | * A umount(8) for Linux 0.99. | |
3 | * umount.c,v 1.1.1.1 1993/11/18 08:40:51 jrs Exp | |
4 | * | |
5 | * Wed Sep 14 22:43:54 1994: Sebastian Lederer | |
6 | * (lederer@next-pc.informatik.uni-bonn.de) added support for sending an | |
7 | * unmount RPC call to the server when an NFS-filesystem is unmounted. | |
726f69e2 KZ |
8 | * |
9 | * Tue Sep 26 16:33:09 1995: Added patches from Greg Page (greg@caldera.com) | |
10 | * so that NetWare filesystems can be unmounted. | |
fd6b7a7f KZ |
11 | * |
12 | * 951213: Marek Michalkiewicz <marekm@i17linuxb.ists.pwr.wroc.pl>: | |
13 | * Ignore any RPC errors, so that you can umount an nfs mounted filesystem | |
14 | * if the server is down. | |
15 | * | |
16 | * 960223: aeb - several minor changes | |
17 | * 960324: aeb - added some changes from Rob Leslie <rob@mars.org> | |
18 | * 960823: aeb - also try umount(spec) when umount(node) fails | |
66ee8158 | 19 | * 970307: aeb - canonicalise names from fstab |
fd6b7a7f | 20 | * 970726: aeb - remount read-only in cases where umount fails |
5c36a0eb KZ |
21 | * 980810: aeb - umount2 support |
22 | * 981222: aeb - If mount point or special file occurs several times | |
23 | * in mtab, try them all, with last one tried first | |
24 | * - Differentiate "user" and "users" key words in fstab | |
66ee8158 | 25 | * 001202: aeb - remove at most one line from /etc/mtab |
6dbe3af9 KZ |
26 | */ |
27 | ||
66ee8158 | 28 | #include <stdio.h> |
fd6b7a7f KZ |
29 | #include <unistd.h> |
30 | #include <getopt.h> | |
31 | #include <string.h> | |
32 | #include <errno.h> | |
66ee8158 | 33 | #include <ctype.h> |
fd6b7a7f KZ |
34 | #include <sys/stat.h> |
35 | #include <sys/mount.h> | |
36 | #include "mount_constants.h" | |
6dbe3af9 | 37 | #include "sundries.h" |
5c36a0eb | 38 | #include "getusername.h" |
fd6b7a7f KZ |
39 | #include "lomount.h" |
40 | #include "loop.h" | |
41 | #include "fstab.h" | |
7eda085c | 42 | #include "nls.h" |
6dbe3af9 KZ |
43 | |
44 | #ifdef HAVE_NFS | |
45 | #include <sys/socket.h> | |
46 | #include <sys/time.h> | |
47 | #include <netdb.h> | |
48 | #include <rpc/rpc.h> | |
49 | #include <rpc/pmap_clnt.h> | |
50 | #include <rpc/pmap_prot.h> | |
fd6b7a7f | 51 | #include "nfsmount.h" |
6dbe3af9 KZ |
52 | #include <arpa/inet.h> |
53 | #endif | |
54 | ||
eb63b9b8 | 55 | #if defined(MNT_FORCE) && !defined(__sparc__) && !defined(__arm__) |
5c36a0eb KZ |
56 | /* Interesting ... it seems libc knows about MNT_FORCE and presumably |
57 | about umount2 as well -- need not do anything */ | |
58 | #else /* MNT_FORCE */ | |
59 | ||
60 | /* Does the present kernel source know about umount2? */ | |
61 | #include <linux/unistd.h> | |
62 | #ifdef __NR_umount2 | |
eb63b9b8 KZ |
63 | |
64 | static int umount2(const char *path, int flags); | |
65 | ||
5c36a0eb | 66 | _syscall2(int, umount2, const char *, path, int, flags); |
eb63b9b8 | 67 | |
5c36a0eb | 68 | #else /* __NR_umount2 */ |
eb63b9b8 | 69 | |
5c36a0eb KZ |
70 | static int |
71 | umount2(const char *path, int flags) { | |
7eda085c | 72 | fprintf(stderr, _("umount: compiled without support for -f\n")); |
5c36a0eb KZ |
73 | errno = ENOSYS; |
74 | return -1; | |
75 | } | |
76 | #endif /* __NR_umount2 */ | |
77 | ||
eb63b9b8 | 78 | #if !defined(MNT_FORCE) |
5c36a0eb KZ |
79 | /* dare not try to include <linux/mount.h> -- lots of errors */ |
80 | #define MNT_FORCE 1 | |
eb63b9b8 | 81 | #endif |
5c36a0eb KZ |
82 | |
83 | #endif /* MNT_FORCE */ | |
84 | ||
85 | /* Nonzero for force umount (-f). There is kernel support since 2.1.116. */ | |
6dbe3af9 | 86 | int force = 0; |
6dbe3af9 | 87 | |
fd6b7a7f KZ |
88 | /* When umount fails, attempt a read-only remount (-r). */ |
89 | int remount = 0; | |
90 | ||
91 | /* Don't write a entry in /etc/mtab (-n). */ | |
92 | int nomtab = 0; | |
93 | ||
66ee8158 KZ |
94 | /* Call losetup -d for each unmounted loop device. */ |
95 | int delloop = 0; | |
96 | ||
97 | /* Nonzero for chatty (-v). */ | |
6dbe3af9 KZ |
98 | int verbose = 0; |
99 | ||
100 | /* True if ruid != euid. */ | |
101 | int suid = 0; | |
102 | ||
103 | #ifdef HAVE_NFS | |
104 | static int xdr_dir(XDR *xdrsp, char *dirp) | |
105 | { | |
106 | return (xdr_string(xdrsp, &dirp, MNTPATHLEN)); | |
107 | } | |
6dbe3af9 | 108 | |
6dbe3af9 | 109 | static int |
fd6b7a7f | 110 | nfs_umount_rpc_call(const char *spec, const char *opts) |
6dbe3af9 | 111 | { |
6dbe3af9 KZ |
112 | register CLIENT *clp; |
113 | struct sockaddr_in saddr; | |
114 | struct timeval pertry, try; | |
115 | enum clnt_stat clnt_stat; | |
66ee8158 | 116 | int port = 0; |
6dbe3af9 | 117 | int so = RPC_ANYSOCK; |
6dbe3af9 | 118 | struct hostent *hostp; |
fd6b7a7f KZ |
119 | char *hostname; |
120 | char *dirname; | |
121 | char *p; | |
122 | ||
123 | if (spec == NULL || (p = strchr(spec,':')) == NULL) | |
124 | return 0; | |
125 | hostname = xstrndup(spec, p-spec); | |
126 | dirname = xstrdup(p+1); | |
127 | #ifdef DEBUG | |
7eda085c | 128 | printf(_("host: %s, directory: %s\n"), hostname, dirname); |
fd6b7a7f KZ |
129 | #endif |
130 | ||
131 | if (opts && (p = strstr(opts, "addr="))) { | |
132 | char *q; | |
133 | ||
134 | free(hostname); | |
135 | p += 5; | |
136 | q = p; | |
137 | while (*q && *q != ',') q++; | |
138 | hostname = xstrndup(p,q-p); | |
139 | } | |
140 | ||
66ee8158 KZ |
141 | if (opts && (p = strstr(opts, "mountport=")) && isdigit(*(p+10))) |
142 | port = atoi(p+10); | |
143 | ||
fd6b7a7f KZ |
144 | if (hostname[0] >= '0' && hostname[0] <= '9') |
145 | saddr.sin_addr.s_addr = inet_addr(hostname); | |
2b6fc908 | 146 | else { |
fd6b7a7f | 147 | if ((hostp = gethostbyname(hostname)) == NULL) { |
7eda085c | 148 | fprintf(stderr, _("umount: can't get address for %s\n"), |
fd6b7a7f KZ |
149 | hostname); |
150 | return 1; | |
2b6fc908 KZ |
151 | } |
152 | if (hostp->h_length > sizeof(struct in_addr)) { | |
7eda085c | 153 | fprintf(stderr, _("umount: got bad hostp->h_length\n")); |
2b6fc908 KZ |
154 | hostp->h_length = sizeof(struct in_addr); |
155 | } | |
156 | memcpy(&saddr.sin_addr, hostp->h_addr, hostp->h_length); | |
157 | } | |
fd6b7a7f KZ |
158 | |
159 | saddr.sin_family = AF_INET; | |
66ee8158 | 160 | saddr.sin_port = htons(port); |
fd6b7a7f KZ |
161 | pertry.tv_sec = 3; |
162 | pertry.tv_usec = 0; | |
163 | if ((clp = clntudp_create(&saddr, MOUNTPROG, MOUNTVERS, | |
164 | pertry, &so)) == NULL) { | |
165 | clnt_pcreateerror("Cannot MOUNTPROG RPC"); | |
166 | return (1); | |
167 | } | |
168 | clp->cl_auth = authunix_create_default(); | |
169 | try.tv_sec = 20; | |
170 | try.tv_usec = 0; | |
171 | clnt_stat = clnt_call(clp, MOUNTPROC_UMNT, | |
172 | (xdrproc_t) xdr_dir, dirname, | |
173 | (xdrproc_t) xdr_void, (caddr_t) 0, | |
174 | try); | |
175 | ||
176 | if (clnt_stat != RPC_SUCCESS) { | |
177 | clnt_perror(clp, "Bad UMNT RPC"); | |
178 | return (1); | |
179 | } | |
180 | auth_destroy(clp->cl_auth); | |
181 | clnt_destroy(clp); | |
182 | ||
183 | return (0); | |
184 | } | |
6dbe3af9 | 185 | #endif /* HAVE_NFS */ |
fd6b7a7f KZ |
186 | |
187 | /* complain about a failed umount */ | |
188 | static void complain(int err, const char *dev) { | |
189 | switch (err) { | |
190 | case ENXIO: | |
7eda085c | 191 | error (_("umount: %s: invalid block device"), dev); break; |
fd6b7a7f | 192 | case EINVAL: |
7eda085c | 193 | error (_("umount: %s: not mounted"), dev); break; |
fd6b7a7f | 194 | case EIO: |
7eda085c | 195 | error (_("umount: %s: can't write superblock"), dev); break; |
fd6b7a7f KZ |
196 | case EBUSY: |
197 | /* Let us hope fstab has a line "proc /proc ..." | |
198 | and not "none /proc ..."*/ | |
7eda085c | 199 | error (_("umount: %s: device is busy"), dev); break; |
fd6b7a7f | 200 | case ENOENT: |
7eda085c | 201 | error (_("umount: %s: not found"), dev); break; |
fd6b7a7f | 202 | case EPERM: |
7eda085c | 203 | error (_("umount: %s: must be superuser to umount"), dev); break; |
fd6b7a7f | 204 | case EACCES: |
7eda085c | 205 | error (_("umount: %s: block devices not permitted on fs"), dev); break; |
fd6b7a7f | 206 | default: |
7eda085c | 207 | error (_("umount: %s: %s"), dev, strerror (err)); break; |
fd6b7a7f KZ |
208 | } |
209 | } | |
210 | ||
211 | /* Umount a single device. Return a status code, so don't exit | |
212 | on a non-fatal error. We lock/unlock around each umount. */ | |
213 | static int | |
214 | umount_one (const char *spec, const char *node, const char *type, | |
66ee8158 KZ |
215 | const char *opts, struct mntentchn *mc) { |
216 | int umnt_err, umnt_err2; | |
217 | int isroot; | |
218 | int res; | |
219 | const char *loopdev; | |
220 | ||
221 | /* Special case for root. As of 0.99pl10 we can (almost) unmount root; | |
222 | the kernel will remount it readonly so that we can carry on running | |
223 | afterwards. The readonly remount is illegal if any files are opened | |
224 | for writing at the time, so we can't update mtab for an unmount of | |
225 | root. As it is only really a remount, this doesn't matter too | |
226 | much. [sct May 29, 1993] */ | |
227 | isroot = (streq (node, "/") || streq (node, "root") | |
228 | || streq (node, "rootfs")); | |
229 | if (isroot) | |
230 | nomtab++; | |
6dbe3af9 KZ |
231 | |
232 | #ifdef HAVE_NFS | |
66ee8158 KZ |
233 | /* Ignore any RPC errors, so that you can umount the filesystem |
234 | if the server is down. */ | |
235 | if (strcasecmp(type, "nfs") == 0) | |
236 | nfs_umount_rpc_call(spec, opts); | |
6dbe3af9 | 237 | #endif |
6dbe3af9 | 238 | |
6dbe3af9 | 239 | |
66ee8158 KZ |
240 | umnt_err = umnt_err2 = 0; |
241 | if (force) { | |
242 | /* completely untested; | |
243 | 2.1.116 only has some support in nfs case */ | |
244 | /* probably this won't work */ | |
245 | int flags = MNT_FORCE; | |
246 | ||
247 | res = umount2 (node, flags); | |
248 | if (res == -1) { | |
249 | perror("umount2"); | |
250 | if (errno == ENOSYS) { | |
251 | if (verbose) | |
252 | printf(_("no umount2, trying umount...\n")); | |
253 | res = umount (node); | |
254 | } | |
255 | } | |
256 | } else | |
257 | res = umount (node); | |
258 | ||
259 | if (res < 0) { | |
260 | umnt_err = errno; | |
261 | /* A device might have been mounted on a node that has since | |
262 | been deleted or renamed, so if node fails, also try spec. */ | |
263 | /* Note that this is incorrect in case spec was mounted | |
264 | several times. */ | |
265 | /* if (umnt_err == ENOENT || umnt_err == EINVAL) */ | |
266 | if (umnt_err != EBUSY && strcmp(node, spec)) { | |
267 | if (verbose) | |
268 | printf (_("could not umount %s - trying %s instead\n"), | |
269 | node, spec); | |
270 | res = umount (spec); | |
271 | if (res < 0) | |
272 | umnt_err2 = errno; | |
273 | /* Do not complain about remote NFS mount points */ | |
274 | if (errno == ENOENT && index(spec, ':')) | |
275 | umnt_err2 = 0; | |
276 | } | |
277 | } | |
278 | ||
279 | if (res < 0 && remount && (umnt_err == EBUSY || umnt_err2 == EBUSY)) { | |
280 | /* Umount failed - let us try a remount */ | |
281 | res = mount(spec, node, NULL, | |
282 | MS_MGC_VAL | MS_REMOUNT | MS_RDONLY, NULL); | |
283 | if (res == 0) { | |
284 | struct mntent remnt; | |
285 | fprintf(stderr, | |
286 | _("umount: %s busy - remounted read-only\n"), | |
287 | spec); | |
288 | remnt.mnt_type = remnt.mnt_fsname = NULL; | |
289 | remnt.mnt_dir = xstrdup(node); | |
290 | remnt.mnt_opts = "ro"; | |
291 | update_mtab(node, &remnt); | |
292 | return 0; | |
293 | } else if (errno != EBUSY) { /* hmm ... */ | |
294 | perror("remount"); | |
295 | fprintf(stderr, | |
296 | _("umount: could not remount %s read-only\n"), | |
297 | spec); | |
298 | } | |
299 | } | |
300 | ||
301 | loopdev = 0; | |
302 | if (res >= 0) { | |
303 | /* Umount succeeded */ | |
304 | if (verbose) | |
305 | printf (_("%s umounted\n"), spec); | |
306 | ||
307 | /* Free any loop devices that we allocated ourselves */ | |
308 | if (mc) { | |
309 | char *optl; | |
310 | ||
311 | /* old style mtab line? */ | |
312 | if (streq(mc->m.mnt_type, "loop")) { | |
313 | loopdev = spec; | |
314 | goto gotloop; | |
315 | } | |
316 | ||
317 | /* new style mtab line? */ | |
318 | optl = mc->m.mnt_opts ? xstrdup(mc->m.mnt_opts) : ""; | |
319 | for (optl = strtok (optl, ","); optl; | |
320 | optl = strtok (NULL, ",")) { | |
321 | if (!strncmp(optl, "loop=", 5)) { | |
322 | loopdev = optl+5; | |
323 | goto gotloop; | |
324 | } | |
325 | } | |
326 | } else { | |
327 | /* | |
328 | * If option "-o loop=spec" occurs in mtab, | |
329 | * note the mount point, and delete mtab line. | |
330 | */ | |
331 | if ((mc = getmntoptfile (spec)) != NULL) | |
332 | node = mc->m.mnt_dir; | |
333 | } | |
334 | ||
335 | /* Also free loop devices when -d flag is given */ | |
336 | if (delloop && is_loop_device(spec)) | |
337 | loopdev = spec; | |
338 | } | |
339 | gotloop: | |
340 | if (loopdev) | |
341 | del_loop(loopdev); | |
342 | ||
343 | if (!nomtab && mtab_is_writable() && | |
344 | (umnt_err == 0 || umnt_err == EINVAL || umnt_err == ENOENT)) { | |
345 | update_mtab (node, NULL); | |
346 | } | |
347 | ||
348 | if (res >= 0) | |
349 | return 0; | |
6dbe3af9 | 350 | |
66ee8158 KZ |
351 | if (umnt_err2) |
352 | complain(umnt_err2, spec); | |
353 | if (umnt_err && umnt_err != umnt_err2) | |
354 | complain(umnt_err, node); | |
355 | return 1; | |
6dbe3af9 KZ |
356 | } |
357 | ||
5c36a0eb KZ |
358 | /* |
359 | * Why this loop? | |
360 | * 1. People who boot a system with a bad fstab root entry | |
361 | * will get an incorrect "/dev/foo on /" in mtab. | |
362 | * If later /dev/foo is actually mounted elsewhere, | |
363 | * it will occur twice in mtab. | |
364 | * 2. With overmounting one can get the situation that | |
365 | * the same filename is used as mount point twice. | |
366 | * In both cases, it is best to try the last occurrence first. | |
367 | */ | |
368 | static int | |
369 | umount_one_bw (const char *file, struct mntentchn *mc) { | |
370 | int res = 1; | |
371 | ||
372 | while (res && mc) { | |
66ee8158 KZ |
373 | res = umount_one(mc->m.mnt_fsname, mc->m.mnt_dir, |
374 | mc->m.mnt_type, mc->m.mnt_opts, mc); | |
5c36a0eb KZ |
375 | mc = getmntfilesbackward (file, mc); |
376 | } | |
377 | return res; | |
378 | } | |
379 | ||
6dbe3af9 KZ |
380 | /* Unmount all filesystems of type VFSTYPES found in mtab. Since we are |
381 | concurrently updating mtab after every succesful umount, we have to | |
382 | slurp in the entire file before we start. This isn't too bad, because | |
383 | in any case it's important to umount mtab entries in reverse order | |
fd6b7a7f | 384 | to mount, e.g. /usr/spool before /usr. */ |
6dbe3af9 | 385 | static int |
fd6b7a7f KZ |
386 | umount_all (string_list types) { |
387 | struct mntentchn *mc, *hd; | |
388 | int errors = 0; | |
389 | ||
390 | hd = mtab_head(); | |
391 | if (!hd->prev) | |
7eda085c | 392 | die (2, _("umount: cannot find list of filesystems to unmount")); |
fd6b7a7f | 393 | for (mc = hd->prev; mc != hd; mc = mc->prev) { |
66ee8158 KZ |
394 | if (matching_type (mc->m.mnt_type, types)) { |
395 | errors |= umount_one (mc->m.mnt_fsname, mc->m.mnt_dir, | |
396 | mc->m.mnt_type, mc->m.mnt_opts, mc); | |
fd6b7a7f KZ |
397 | } |
398 | } | |
6dbe3af9 | 399 | |
fd6b7a7f KZ |
400 | sync (); |
401 | return errors; | |
6dbe3af9 KZ |
402 | } |
403 | ||
404 | extern char version[]; | |
405 | static struct option longopts[] = | |
406 | { | |
407 | { "all", 0, 0, 'a' }, | |
408 | { "force", 0, 0, 'f' }, | |
409 | { "help", 0, 0, 'h' }, | |
fd6b7a7f | 410 | { "no-mtab", 0, 0, 'n' }, |
6dbe3af9 KZ |
411 | { "verbose", 0, 0, 'v' }, |
412 | { "version", 0, 0, 'V' }, | |
fd6b7a7f | 413 | { "read-only", 0, 0, 'r' }, |
6dbe3af9 KZ |
414 | { "types", 1, 0, 't' }, |
415 | { NULL, 0, 0, 0 } | |
416 | }; | |
417 | ||
6dbe3af9 KZ |
418 | static void |
419 | usage (FILE *fp, int n) | |
420 | { | |
7eda085c KZ |
421 | fprintf (fp, _("Usage: umount [-hV]\n" |
422 | " umount -a [-f] [-r] [-n] [-v] [-t vfstypes]\n" | |
423 | " umount [-f] [-r] [-n] [-v] special | node...\n")); | |
6dbe3af9 KZ |
424 | exit (n); |
425 | } | |
426 | ||
726f69e2 KZ |
427 | int mount_quiet = 0; |
428 | ||
6dbe3af9 KZ |
429 | int |
430 | main (int argc, char *argv[]) | |
431 | { | |
432 | int c; | |
433 | int all = 0; | |
434 | string_list types = NULL; | |
435 | string_list options; | |
fd6b7a7f | 436 | struct mntentchn *mc, *fs; |
6dbe3af9 KZ |
437 | char *file; |
438 | int result = 0; | |
439 | ||
7eda085c KZ |
440 | setlocale(LC_ALL, ""); |
441 | bindtextdomain(PACKAGE, LOCALEDIR); | |
442 | textdomain(PACKAGE); | |
443 | ||
5c36a0eb KZ |
444 | while ((c = getopt_long (argc, argv, "afhnrt:vV", |
445 | longopts, NULL)) != EOF) | |
fd6b7a7f | 446 | switch (c) { |
6dbe3af9 KZ |
447 | case 'a': /* umount everything */ |
448 | ++all; | |
449 | break; | |
66ee8158 KZ |
450 | /* fall through? */ |
451 | case 'd': /* do losetup -d for unmounted loop devices */ | |
452 | ++delloop; | |
453 | break; | |
5c36a0eb | 454 | case 'f': /* force umount */ |
6dbe3af9 | 455 | ++force; |
6dbe3af9 KZ |
456 | break; |
457 | case 'h': /* help */ | |
458 | usage (stdout, 0); | |
459 | break; | |
5c36a0eb | 460 | case 'n': /* do not write in /etc/mtab */ |
fd6b7a7f KZ |
461 | ++nomtab; |
462 | break; | |
463 | case 'r': /* remount read-only if umount fails */ | |
464 | ++remount; | |
465 | break; | |
6dbe3af9 KZ |
466 | case 'v': /* make noise */ |
467 | ++verbose; | |
468 | break; | |
469 | case 'V': /* version */ | |
726f69e2 | 470 | printf ("umount: %s\n", version); |
6dbe3af9 KZ |
471 | exit (0); |
472 | case 't': /* specify file system type */ | |
473 | types = parse_list (optarg); | |
474 | break; | |
475 | case 0: | |
476 | break; | |
477 | case '?': | |
478 | default: | |
479 | usage (stderr, 1); | |
fd6b7a7f | 480 | } |
6dbe3af9 KZ |
481 | |
482 | if (getuid () != geteuid ()) | |
483 | { | |
484 | suid = 1; | |
5c36a0eb | 485 | if (all || types || nomtab || force) |
7eda085c | 486 | die (2, _("umount: only root can do that")); |
6dbe3af9 KZ |
487 | } |
488 | ||
489 | argc -= optind; | |
490 | argv += optind; | |
491 | ||
fd6b7a7f KZ |
492 | if (all) { |
493 | if (types == NULL) | |
7eda085c | 494 | types = parse_list("noproc"); |
fd6b7a7f KZ |
495 | result = umount_all (types); |
496 | } else if (argc < 1) { | |
497 | usage (stderr, 2); | |
498 | } else while (argc--) { | |
499 | file = canonicalize (*argv); /* mtab paths are canonicalized */ | |
500 | if (verbose > 1) | |
7eda085c | 501 | printf(_("Trying to umount %s\n"), file); |
fd6b7a7f | 502 | |
5c36a0eb | 503 | mc = getmntfilesbackward (file, NULL); |
fd6b7a7f | 504 | if (!mc && verbose) |
7eda085c | 505 | printf(_("Could not find %s in mtab\n"), file); |
fd6b7a7f KZ |
506 | |
507 | if (suid) { | |
508 | if (!mc) | |
7eda085c | 509 | die (2, _("umount: %s is not mounted (according to mtab)"), file); |
5c36a0eb | 510 | if (getmntfilesbackward (file, mc)) |
7eda085c | 511 | die (2, _("umount: it seems %s is mounted multiple times"), file); |
eb63b9b8 KZ |
512 | |
513 | /* If fstab contains the two lines | |
514 | /dev/sda1 /mnt/zip auto user,noauto 0 0 | |
515 | /dev/sda4 /mnt/zip auto user,noauto 0 0 | |
516 | then "mount /dev/sda4" followed by "umount /mnt/zip" | |
517 | used to fail. So, we must not look for file, but for | |
518 | the pair (spec,file) in fstab. */ | |
66ee8158 | 519 | fs = getfsspecfile(mc->m.mnt_fsname, mc->m.mnt_dir); |
eb63b9b8 KZ |
520 | if (!fs) { |
521 | if (!getfsspec (file) && !getfsfile (file)) | |
522 | die (2, | |
523 | _("umount: %s is not in the fstab (and you are not root)"), | |
fd6b7a7f | 524 | file); |
eb63b9b8 KZ |
525 | else |
526 | die (2, _("umount: %s mount disagrees with the fstab"), file); | |
fd6b7a7f | 527 | } |
5c36a0eb KZ |
528 | |
529 | /* User mounting and unmounting is allowed only | |
530 | if fstab contains the option `user' or `users' */ | |
531 | /* The option `users' allows arbitrary users to mount | |
532 | and unmount - this may be a security risk. */ | |
533 | /* The option `user' only allows unmounting by the user | |
534 | that mounted. */ | |
eb63b9b8 | 535 | /* The option `owner' only allows (un)mounting by the owner. */ |
5c36a0eb KZ |
536 | /* A convenient side effect is that the user who mounted |
537 | is visible in mtab. */ | |
66ee8158 | 538 | options = parse_list (fs->m.mnt_opts); |
fd6b7a7f | 539 | while (options) { |
5c36a0eb | 540 | if (streq (car (options), "user") || |
eb63b9b8 KZ |
541 | streq (car (options), "users") || |
542 | streq (car (options), "owner")) | |
6dbe3af9 KZ |
543 | break; |
544 | options = cdr (options); | |
fd6b7a7f | 545 | } |
6dbe3af9 | 546 | if (!options) |
7eda085c | 547 | die (2, _("umount: only root can unmount %s from %s"), |
66ee8158 | 548 | fs->m.mnt_fsname, fs->m.mnt_dir); |
eb63b9b8 KZ |
549 | if (streq (car (options), "user") || |
550 | streq (car (options), "owner")) { | |
5c36a0eb KZ |
551 | char *user = getusername(); |
552 | ||
66ee8158 | 553 | options = parse_list (mc->m.mnt_opts); |
5c36a0eb KZ |
554 | while (options) { |
555 | char *co = car (options); | |
556 | if (!strncmp(co, "user=", 5)) { | |
557 | if (!user || !streq(co+5,user)) | |
7eda085c | 558 | die(2, _("umount: only %s can unmount %s from %s"), |
66ee8158 | 559 | co+5, fs->m.mnt_fsname, fs->m.mnt_dir); |
5c36a0eb KZ |
560 | break; |
561 | } | |
562 | options = cdr (options); | |
563 | } | |
564 | } | |
fd6b7a7f | 565 | } |
6dbe3af9 | 566 | |
fd6b7a7f | 567 | if (mc) |
5c36a0eb | 568 | result = umount_one_bw (file, mc); |
fd6b7a7f | 569 | else |
5c36a0eb | 570 | result = umount_one (*argv, *argv, *argv, *argv, NULL); |
726f69e2 | 571 | |
fd6b7a7f KZ |
572 | argv++; |
573 | ||
574 | } | |
6dbe3af9 KZ |
575 | exit (result); |
576 | } | |
fd6b7a7f | 577 |