41
42#include <sys/param.h>
43#include <sys/mount.h>
44#include <sys/stat.h>
45#include <sys/wait.h>
46
47#include <ctype.h>
48#include <err.h>
49#include <errno.h>
50#include <fstab.h>
51#include <paths.h>
52#include <pwd.h>
53#include <signal.h>
54#include <stdint.h>
55#include <stdio.h>
56#include <stdlib.h>
57#include <string.h>
58#include <unistd.h>
59#include <libutil.h>
60
61#include "extern.h"
62#include "mntopts.h"
63#include "pathnames.h"
64
65/* `meta' options */
66#define MOUNT_META_OPTION_FSTAB "fstab"
67#define MOUNT_META_OPTION_CURRENT "current"
68
69static int debug, fstab_style, verbose;
70
71struct cpa {
72 char **a;
73 ssize_t sz;
74 int c;
75};
76
77char *catopt(char *, const char *);
78struct statfs *getmntpt(const char *);
79int hasopt(const char *, const char *);
80int ismounted(struct fstab *, struct statfs *, int);
81int isremountable(const char *);
82void mangle(char *, struct cpa *);
83char *update_options(char *, char *, int);
84int mountfs(const char *, const char *, const char *,
85 int, const char *, const char *);
86void remopt(char *, const char *);
87void prmount(struct statfs *);
88void putfsent(struct statfs *);
89void usage(void);
90char *flags2opts(int);
91
92/* Map from mount options to printable formats. */
93static struct opt {
94 uint64_t o_opt;
95 const char *o_name;
96} optnames[] = {
97 { MNT_ASYNC, "asynchronous" },
98 { MNT_EXPORTED, "NFS exported" },
99 { MNT_LOCAL, "local" },
100 { MNT_NOATIME, "noatime" },
101 { MNT_NOEXEC, "noexec" },
102 { MNT_NOSUID, "nosuid" },
103 { MNT_NOSYMFOLLOW, "nosymfollow" },
104 { MNT_QUOTA, "with quotas" },
105 { MNT_RDONLY, "read-only" },
106 { MNT_SYNCHRONOUS, "synchronous" },
107 { MNT_UNION, "union" },
108 { MNT_NOCLUSTERR, "noclusterr" },
109 { MNT_NOCLUSTERW, "noclusterw" },
110 { MNT_SUIDDIR, "suiddir" },
111 { MNT_SOFTDEP, "soft-updates" },
112 { MNT_SUJ, "journaled soft-updates" },
113 { MNT_MULTILABEL, "multilabel" },
114 { MNT_ACLS, "acls" },
115 { MNT_NFS4ACLS, "nfsv4acls" },
116 { MNT_GJOURNAL, "gjournal" },
117 { 0, NULL }
118};
119
120/*
121 * List of VFS types that can be remounted without becoming mounted on top
122 * of each other.
123 * XXX Is this list correct?
124 */
125static const char *
126remountable_fs_names[] = {
127 "ufs", "ffs", "ext2fs",
128 0
129};
130
131static const char userquotaeq[] = "userquota=";
132static const char groupquotaeq[] = "groupquota=";
133
134static char *mountprog = NULL;
135
136static int
137use_mountprog(const char *vfstype)
138{
139 /* XXX: We need to get away from implementing external mount
140 * programs for every filesystem, and move towards having
141 * each filesystem properly implement the nmount() system call.
142 */
143 unsigned int i;
144 const char *fs[] = {
145 "cd9660", "mfs", "msdosfs", "nfs", "ntfs",
146 "nwfs", "nullfs", "oldnfs", "portalfs", "smbfs", "udf", "unionfs",
147 NULL
148 };
149
150 if (mountprog != NULL)
151 return (1);
152
153 for (i = 0; fs[i] != NULL; ++i) {
154 if (strcmp(vfstype, fs[i]) == 0)
155 return (1);
156 }
157
158 return (0);
159}
160
161static int
162exec_mountprog(const char *name, const char *execname, char *const argv[])
163{
164 pid_t pid;
165 int status;
166
167 switch (pid = fork()) {
168 case -1: /* Error. */
169 warn("fork");
170 exit (1);
171 case 0: /* Child. */
172 /* Go find an executable. */
173 execvP(execname, _PATH_SYSPATH, argv);
174 if (errno == ENOENT) {
175 warn("exec %s not found", execname);
176 if (execname[0] != '/') {
177 warnx("in path: %s", _PATH_SYSPATH);
178 }
179 }
180 exit(1);
181 default: /* Parent. */
182 if (waitpid(pid, &status, 0) < 0) {
183 warn("waitpid");
184 return (1);
185 }
186
187 if (WIFEXITED(status)) {
188 if (WEXITSTATUS(status) != 0)
189 return (WEXITSTATUS(status));
190 } else if (WIFSIGNALED(status)) {
191 warnx("%s: %s", name, sys_siglist[WTERMSIG(status)]);
192 return (1);
193 }
194 break;
195 }
196
197 return (0);
198}
199
200static int
201specified_ro(const char *arg)
202{
203 char *optbuf, *opt;
204 int ret = 0;
205
206 optbuf = strdup(arg);
207 if (optbuf == NULL)
208 err(1, NULL);
209
210 for (opt = optbuf; (opt = strtok(opt, ",")) != NULL; opt = NULL) {
211 if (strcmp(opt, "ro") == 0) {
212 ret = 1;
213 break;
214 }
215 }
216 free(optbuf);
217 return (ret);
218}
219
220static void
221restart_mountd(void)
222{
223 struct pidfh *pfh;
224 pid_t mountdpid;
225
226 pfh = pidfile_open(_PATH_MOUNTDPID, 0600, &mountdpid);
227 if (pfh != NULL) {
228 /* Mountd is not running. */
229 pidfile_remove(pfh);
230 return;
231 }
232 if (errno != EEXIST) {
233 /* Cannot open pidfile for some reason. */
234 return;
235 }
236 /* We have mountd(8) PID in mountdpid varible, let's signal it. */
237 if (kill(mountdpid, SIGHUP) == -1)
238 err(1, "signal mountd");
239}
240
241int
242main(int argc, char *argv[])
243{
244 const char *mntfromname, **vfslist, *vfstype;
245 struct fstab *fs;
246 struct statfs *mntbuf;
247 int all, ch, i, init_flags, late, failok, mntsize, rval, have_fstab, ro;
248 char *cp, *ep, *options;
249
250 all = init_flags = late = 0;
251 ro = 0;
252 options = NULL;
253 vfslist = NULL;
254 vfstype = "ufs";
255 while ((ch = getopt(argc, argv, "adF:flo:prt:uvw")) != -1)
256 switch (ch) {
257 case 'a':
258 all = 1;
259 break;
260 case 'd':
261 debug = 1;
262 break;
263 case 'F':
264 setfstab(optarg);
265 break;
266 case 'f':
267 init_flags |= MNT_FORCE;
268 break;
269 case 'l':
270 late = 1;
271 break;
272 case 'o':
273 if (*optarg) {
274 options = catopt(options, optarg);
275 if (specified_ro(optarg))
276 ro = 1;
277 }
278 break;
279 case 'p':
280 fstab_style = 1;
281 verbose = 1;
282 break;
283 case 'r':
284 options = catopt(options, "ro");
285 ro = 1;
286 break;
287 case 't':
288 if (vfslist != NULL)
289 errx(1, "only one -t option may be specified");
290 vfslist = makevfslist(optarg);
291 vfstype = optarg;
292 break;
293 case 'u':
294 init_flags |= MNT_UPDATE;
295 break;
296 case 'v':
297 verbose = 1;
298 break;
299 case 'w':
300 options = catopt(options, "noro");
301 break;
302 case '?':
303 default:
304 usage();
305 /* NOTREACHED */
306 }
307 argc -= optind;
308 argv += optind;
309
310#define BADTYPE(type) \
311 (strcmp(type, FSTAB_RO) && \
312 strcmp(type, FSTAB_RW) && strcmp(type, FSTAB_RQ))
313
314 if ((init_flags & MNT_UPDATE) && (ro == 0))
315 options = catopt(options, "noro");
316
317 rval = 0;
318 switch (argc) {
319 case 0:
320 if ((mntsize = getmntinfo(&mntbuf, MNT_NOWAIT)) == 0)
321 err(1, "getmntinfo");
322 if (all) {
323 while ((fs = getfsent()) != NULL) {
324 if (BADTYPE(fs->fs_type))
325 continue;
326 if (checkvfsname(fs->fs_vfstype, vfslist))
327 continue;
328 if (hasopt(fs->fs_mntops, "noauto"))
329 continue;
330 if (hasopt(fs->fs_mntops, "late") && !late)
331 continue;
332 if (hasopt(fs->fs_mntops, "failok"))
333 failok = 1;
334 else
335 failok = 0;
336 if (!(init_flags & MNT_UPDATE) &&
337 ismounted(fs, mntbuf, mntsize))
338 continue;
339 options = update_options(options, fs->fs_mntops,
340 mntbuf->f_flags);
341 if (mountfs(fs->fs_vfstype, fs->fs_spec,
342 fs->fs_file, init_flags, options,
343 fs->fs_mntops) && !failok)
344 rval = 1;
345 }
346 } else if (fstab_style) {
347 for (i = 0; i < mntsize; i++) {
348 if (checkvfsname(mntbuf[i].f_fstypename, vfslist))
349 continue;
350 putfsent(&mntbuf[i]);
351 }
352 } else {
353 for (i = 0; i < mntsize; i++) {
354 if (checkvfsname(mntbuf[i].f_fstypename,
355 vfslist))
356 continue;
357 if (!verbose &&
358 (mntbuf[i].f_flags & MNT_IGNORE) != 0)
359 continue;
360 prmount(&mntbuf[i]);
361 }
362 }
363 exit(rval);
364 case 1:
365 if (vfslist != NULL)
366 usage();
367
368 rmslashes(*argv, *argv);
369 if (init_flags & MNT_UPDATE) {
370 mntfromname = NULL;
371 have_fstab = 0;
372 if ((mntbuf = getmntpt(*argv)) == NULL)
373 errx(1, "not currently mounted %s", *argv);
374 /*
375 * Only get the mntflags from fstab if both mntpoint
376 * and mntspec are identical. Also handle the special
377 * case where just '/' is mounted and 'spec' is not
378 * identical with the one from fstab ('/dev' is missing
379 * in the spec-string at boot-time).
380 */
381 if ((fs = getfsfile(mntbuf->f_mntonname)) != NULL) {
382 if (strcmp(fs->fs_spec,
383 mntbuf->f_mntfromname) == 0 &&
384 strcmp(fs->fs_file,
385 mntbuf->f_mntonname) == 0) {
386 have_fstab = 1;
387 mntfromname = mntbuf->f_mntfromname;
388 } else if (argv[0][0] == '/' &&
389 argv[0][1] == '\0') {
390 fs = getfsfile("/");
391 have_fstab = 1;
392 mntfromname = fs->fs_spec;
393 }
394 }
395 if (have_fstab) {
396 options = update_options(options, fs->fs_mntops,
397 mntbuf->f_flags);
398 } else {
399 mntfromname = mntbuf->f_mntfromname;
400 options = update_options(options, NULL,
401 mntbuf->f_flags);
402 }
403 rval = mountfs(mntbuf->f_fstypename, mntfromname,
404 mntbuf->f_mntonname, init_flags, options, 0);
405 break;
406 }
407 if ((fs = getfsfile(*argv)) == NULL &&
408 (fs = getfsspec(*argv)) == NULL)
409 errx(1, "%s: unknown special file or file system",
410 *argv);
411 if (BADTYPE(fs->fs_type))
412 errx(1, "%s has unknown file system type",
413 *argv);
414 rval = mountfs(fs->fs_vfstype, fs->fs_spec, fs->fs_file,
415 init_flags, options, fs->fs_mntops);
416 break;
417 case 2:
418 /*
419 * If -t flag has not been specified, the path cannot be
420 * found, spec contains either a ':' or a '@', then assume
421 * that an NFS file system is being specified ala Sun.
422 * Check if the hostname contains only allowed characters
423 * to reduce false positives. IPv6 addresses containing
424 * ':' will be correctly parsed only if the separator is '@'.
425 * The definition of a valid hostname is taken from RFC 1034.
426 */
427 if (vfslist == NULL && ((ep = strchr(argv[0], '@')) != NULL ||
428 (ep = strchr(argv[0], ':')) != NULL)) {
429 if (*ep == '@') {
430 cp = ep + 1;
431 ep = cp + strlen(cp);
432 } else
433 cp = argv[0];
434 while (cp != ep) {
435 if (!isdigit(*cp) && !isalpha(*cp) &&
436 *cp != '.' && *cp != '-' && *cp != ':')
437 break;
438 cp++;
439 }
440 if (cp == ep)
441 vfstype = "nfs";
442 }
443 rval = mountfs(vfstype,
444 argv[0], argv[1], init_flags, options, NULL);
445 break;
446 default:
447 usage();
448 /* NOTREACHED */
449 }
450
451 /*
452 * If the mount was successfully, and done by root, tell mountd the
453 * good news.
454 */
455 if (rval == 0 && getuid() == 0)
456 restart_mountd();
457
458 exit(rval);
459}
460
461int
462ismounted(struct fstab *fs, struct statfs *mntbuf, int mntsize)
463{
464 char realfsfile[PATH_MAX];
465 int i;
466
467 if (fs->fs_file[0] == '/' && fs->fs_file[1] == '\0')
468 /* the root file system can always be remounted */
469 return (0);
470
471 /* The user may have specified a symlink in fstab, resolve the path */
472 if (realpath(fs->fs_file, realfsfile) == NULL) {
473 /* Cannot resolve the path, use original one */
474 strlcpy(realfsfile, fs->fs_file, sizeof(realfsfile));
475 }
476
477 for (i = mntsize - 1; i >= 0; --i)
478 if (strcmp(realfsfile, mntbuf[i].f_mntonname) == 0 &&
479 (!isremountable(fs->fs_vfstype) ||
480 strcmp(fs->fs_spec, mntbuf[i].f_mntfromname) == 0))
481 return (1);
482 return (0);
483}
484
485int
486isremountable(const char *vfsname)
487{
488 const char **cp;
489
490 for (cp = remountable_fs_names; *cp; cp++)
491 if (strcmp(*cp, vfsname) == 0)
492 return (1);
493 return (0);
494}
495
496int
497hasopt(const char *mntopts, const char *option)
498{
499 int negative, found;
500 char *opt, *optbuf;
501
502 if (option[0] == 'n' && option[1] == 'o') {
503 negative = 1;
504 option += 2;
505 } else
506 negative = 0;
507 optbuf = strdup(mntopts);
508 found = 0;
509 for (opt = optbuf; (opt = strtok(opt, ",")) != NULL; opt = NULL) {
510 if (opt[0] == 'n' && opt[1] == 'o') {
511 if (!strcasecmp(opt + 2, option))
512 found = negative;
513 } else if (!strcasecmp(opt, option))
514 found = !negative;
515 }
516 free(optbuf);
517 return (found);
518}
519
520static void
521append_arg(struct cpa *sa, char *arg)
522{
523 if (sa->c + 1 == sa->sz) {
524 sa->sz = sa->sz == 0 ? 8 : sa->sz * 2;
525 sa->a = realloc(sa->a, sizeof(sa->a) * sa->sz);
526 if (sa->a == NULL)
527 errx(1, "realloc failed");
528 }
529 sa->a[++sa->c] = arg;
530}
531
532int
533mountfs(const char *vfstype, const char *spec, const char *name, int flags,
534 const char *options, const char *mntopts)
535{
536 struct statfs sf;
537 int i, ret;
538 char *optbuf, execname[PATH_MAX], mntpath[PATH_MAX];
539 static struct cpa mnt_argv;
540
541 /* resolve the mountpoint with realpath(3) */
| 41
42#include <sys/param.h>
43#include <sys/mount.h>
44#include <sys/stat.h>
45#include <sys/wait.h>
46
47#include <ctype.h>
48#include <err.h>
49#include <errno.h>
50#include <fstab.h>
51#include <paths.h>
52#include <pwd.h>
53#include <signal.h>
54#include <stdint.h>
55#include <stdio.h>
56#include <stdlib.h>
57#include <string.h>
58#include <unistd.h>
59#include <libutil.h>
60
61#include "extern.h"
62#include "mntopts.h"
63#include "pathnames.h"
64
65/* `meta' options */
66#define MOUNT_META_OPTION_FSTAB "fstab"
67#define MOUNT_META_OPTION_CURRENT "current"
68
69static int debug, fstab_style, verbose;
70
71struct cpa {
72 char **a;
73 ssize_t sz;
74 int c;
75};
76
77char *catopt(char *, const char *);
78struct statfs *getmntpt(const char *);
79int hasopt(const char *, const char *);
80int ismounted(struct fstab *, struct statfs *, int);
81int isremountable(const char *);
82void mangle(char *, struct cpa *);
83char *update_options(char *, char *, int);
84int mountfs(const char *, const char *, const char *,
85 int, const char *, const char *);
86void remopt(char *, const char *);
87void prmount(struct statfs *);
88void putfsent(struct statfs *);
89void usage(void);
90char *flags2opts(int);
91
92/* Map from mount options to printable formats. */
93static struct opt {
94 uint64_t o_opt;
95 const char *o_name;
96} optnames[] = {
97 { MNT_ASYNC, "asynchronous" },
98 { MNT_EXPORTED, "NFS exported" },
99 { MNT_LOCAL, "local" },
100 { MNT_NOATIME, "noatime" },
101 { MNT_NOEXEC, "noexec" },
102 { MNT_NOSUID, "nosuid" },
103 { MNT_NOSYMFOLLOW, "nosymfollow" },
104 { MNT_QUOTA, "with quotas" },
105 { MNT_RDONLY, "read-only" },
106 { MNT_SYNCHRONOUS, "synchronous" },
107 { MNT_UNION, "union" },
108 { MNT_NOCLUSTERR, "noclusterr" },
109 { MNT_NOCLUSTERW, "noclusterw" },
110 { MNT_SUIDDIR, "suiddir" },
111 { MNT_SOFTDEP, "soft-updates" },
112 { MNT_SUJ, "journaled soft-updates" },
113 { MNT_MULTILABEL, "multilabel" },
114 { MNT_ACLS, "acls" },
115 { MNT_NFS4ACLS, "nfsv4acls" },
116 { MNT_GJOURNAL, "gjournal" },
117 { 0, NULL }
118};
119
120/*
121 * List of VFS types that can be remounted without becoming mounted on top
122 * of each other.
123 * XXX Is this list correct?
124 */
125static const char *
126remountable_fs_names[] = {
127 "ufs", "ffs", "ext2fs",
128 0
129};
130
131static const char userquotaeq[] = "userquota=";
132static const char groupquotaeq[] = "groupquota=";
133
134static char *mountprog = NULL;
135
136static int
137use_mountprog(const char *vfstype)
138{
139 /* XXX: We need to get away from implementing external mount
140 * programs for every filesystem, and move towards having
141 * each filesystem properly implement the nmount() system call.
142 */
143 unsigned int i;
144 const char *fs[] = {
145 "cd9660", "mfs", "msdosfs", "nfs", "ntfs",
146 "nwfs", "nullfs", "oldnfs", "portalfs", "smbfs", "udf", "unionfs",
147 NULL
148 };
149
150 if (mountprog != NULL)
151 return (1);
152
153 for (i = 0; fs[i] != NULL; ++i) {
154 if (strcmp(vfstype, fs[i]) == 0)
155 return (1);
156 }
157
158 return (0);
159}
160
161static int
162exec_mountprog(const char *name, const char *execname, char *const argv[])
163{
164 pid_t pid;
165 int status;
166
167 switch (pid = fork()) {
168 case -1: /* Error. */
169 warn("fork");
170 exit (1);
171 case 0: /* Child. */
172 /* Go find an executable. */
173 execvP(execname, _PATH_SYSPATH, argv);
174 if (errno == ENOENT) {
175 warn("exec %s not found", execname);
176 if (execname[0] != '/') {
177 warnx("in path: %s", _PATH_SYSPATH);
178 }
179 }
180 exit(1);
181 default: /* Parent. */
182 if (waitpid(pid, &status, 0) < 0) {
183 warn("waitpid");
184 return (1);
185 }
186
187 if (WIFEXITED(status)) {
188 if (WEXITSTATUS(status) != 0)
189 return (WEXITSTATUS(status));
190 } else if (WIFSIGNALED(status)) {
191 warnx("%s: %s", name, sys_siglist[WTERMSIG(status)]);
192 return (1);
193 }
194 break;
195 }
196
197 return (0);
198}
199
200static int
201specified_ro(const char *arg)
202{
203 char *optbuf, *opt;
204 int ret = 0;
205
206 optbuf = strdup(arg);
207 if (optbuf == NULL)
208 err(1, NULL);
209
210 for (opt = optbuf; (opt = strtok(opt, ",")) != NULL; opt = NULL) {
211 if (strcmp(opt, "ro") == 0) {
212 ret = 1;
213 break;
214 }
215 }
216 free(optbuf);
217 return (ret);
218}
219
220static void
221restart_mountd(void)
222{
223 struct pidfh *pfh;
224 pid_t mountdpid;
225
226 pfh = pidfile_open(_PATH_MOUNTDPID, 0600, &mountdpid);
227 if (pfh != NULL) {
228 /* Mountd is not running. */
229 pidfile_remove(pfh);
230 return;
231 }
232 if (errno != EEXIST) {
233 /* Cannot open pidfile for some reason. */
234 return;
235 }
236 /* We have mountd(8) PID in mountdpid varible, let's signal it. */
237 if (kill(mountdpid, SIGHUP) == -1)
238 err(1, "signal mountd");
239}
240
241int
242main(int argc, char *argv[])
243{
244 const char *mntfromname, **vfslist, *vfstype;
245 struct fstab *fs;
246 struct statfs *mntbuf;
247 int all, ch, i, init_flags, late, failok, mntsize, rval, have_fstab, ro;
248 char *cp, *ep, *options;
249
250 all = init_flags = late = 0;
251 ro = 0;
252 options = NULL;
253 vfslist = NULL;
254 vfstype = "ufs";
255 while ((ch = getopt(argc, argv, "adF:flo:prt:uvw")) != -1)
256 switch (ch) {
257 case 'a':
258 all = 1;
259 break;
260 case 'd':
261 debug = 1;
262 break;
263 case 'F':
264 setfstab(optarg);
265 break;
266 case 'f':
267 init_flags |= MNT_FORCE;
268 break;
269 case 'l':
270 late = 1;
271 break;
272 case 'o':
273 if (*optarg) {
274 options = catopt(options, optarg);
275 if (specified_ro(optarg))
276 ro = 1;
277 }
278 break;
279 case 'p':
280 fstab_style = 1;
281 verbose = 1;
282 break;
283 case 'r':
284 options = catopt(options, "ro");
285 ro = 1;
286 break;
287 case 't':
288 if (vfslist != NULL)
289 errx(1, "only one -t option may be specified");
290 vfslist = makevfslist(optarg);
291 vfstype = optarg;
292 break;
293 case 'u':
294 init_flags |= MNT_UPDATE;
295 break;
296 case 'v':
297 verbose = 1;
298 break;
299 case 'w':
300 options = catopt(options, "noro");
301 break;
302 case '?':
303 default:
304 usage();
305 /* NOTREACHED */
306 }
307 argc -= optind;
308 argv += optind;
309
310#define BADTYPE(type) \
311 (strcmp(type, FSTAB_RO) && \
312 strcmp(type, FSTAB_RW) && strcmp(type, FSTAB_RQ))
313
314 if ((init_flags & MNT_UPDATE) && (ro == 0))
315 options = catopt(options, "noro");
316
317 rval = 0;
318 switch (argc) {
319 case 0:
320 if ((mntsize = getmntinfo(&mntbuf, MNT_NOWAIT)) == 0)
321 err(1, "getmntinfo");
322 if (all) {
323 while ((fs = getfsent()) != NULL) {
324 if (BADTYPE(fs->fs_type))
325 continue;
326 if (checkvfsname(fs->fs_vfstype, vfslist))
327 continue;
328 if (hasopt(fs->fs_mntops, "noauto"))
329 continue;
330 if (hasopt(fs->fs_mntops, "late") && !late)
331 continue;
332 if (hasopt(fs->fs_mntops, "failok"))
333 failok = 1;
334 else
335 failok = 0;
336 if (!(init_flags & MNT_UPDATE) &&
337 ismounted(fs, mntbuf, mntsize))
338 continue;
339 options = update_options(options, fs->fs_mntops,
340 mntbuf->f_flags);
341 if (mountfs(fs->fs_vfstype, fs->fs_spec,
342 fs->fs_file, init_flags, options,
343 fs->fs_mntops) && !failok)
344 rval = 1;
345 }
346 } else if (fstab_style) {
347 for (i = 0; i < mntsize; i++) {
348 if (checkvfsname(mntbuf[i].f_fstypename, vfslist))
349 continue;
350 putfsent(&mntbuf[i]);
351 }
352 } else {
353 for (i = 0; i < mntsize; i++) {
354 if (checkvfsname(mntbuf[i].f_fstypename,
355 vfslist))
356 continue;
357 if (!verbose &&
358 (mntbuf[i].f_flags & MNT_IGNORE) != 0)
359 continue;
360 prmount(&mntbuf[i]);
361 }
362 }
363 exit(rval);
364 case 1:
365 if (vfslist != NULL)
366 usage();
367
368 rmslashes(*argv, *argv);
369 if (init_flags & MNT_UPDATE) {
370 mntfromname = NULL;
371 have_fstab = 0;
372 if ((mntbuf = getmntpt(*argv)) == NULL)
373 errx(1, "not currently mounted %s", *argv);
374 /*
375 * Only get the mntflags from fstab if both mntpoint
376 * and mntspec are identical. Also handle the special
377 * case where just '/' is mounted and 'spec' is not
378 * identical with the one from fstab ('/dev' is missing
379 * in the spec-string at boot-time).
380 */
381 if ((fs = getfsfile(mntbuf->f_mntonname)) != NULL) {
382 if (strcmp(fs->fs_spec,
383 mntbuf->f_mntfromname) == 0 &&
384 strcmp(fs->fs_file,
385 mntbuf->f_mntonname) == 0) {
386 have_fstab = 1;
387 mntfromname = mntbuf->f_mntfromname;
388 } else if (argv[0][0] == '/' &&
389 argv[0][1] == '\0') {
390 fs = getfsfile("/");
391 have_fstab = 1;
392 mntfromname = fs->fs_spec;
393 }
394 }
395 if (have_fstab) {
396 options = update_options(options, fs->fs_mntops,
397 mntbuf->f_flags);
398 } else {
399 mntfromname = mntbuf->f_mntfromname;
400 options = update_options(options, NULL,
401 mntbuf->f_flags);
402 }
403 rval = mountfs(mntbuf->f_fstypename, mntfromname,
404 mntbuf->f_mntonname, init_flags, options, 0);
405 break;
406 }
407 if ((fs = getfsfile(*argv)) == NULL &&
408 (fs = getfsspec(*argv)) == NULL)
409 errx(1, "%s: unknown special file or file system",
410 *argv);
411 if (BADTYPE(fs->fs_type))
412 errx(1, "%s has unknown file system type",
413 *argv);
414 rval = mountfs(fs->fs_vfstype, fs->fs_spec, fs->fs_file,
415 init_flags, options, fs->fs_mntops);
416 break;
417 case 2:
418 /*
419 * If -t flag has not been specified, the path cannot be
420 * found, spec contains either a ':' or a '@', then assume
421 * that an NFS file system is being specified ala Sun.
422 * Check if the hostname contains only allowed characters
423 * to reduce false positives. IPv6 addresses containing
424 * ':' will be correctly parsed only if the separator is '@'.
425 * The definition of a valid hostname is taken from RFC 1034.
426 */
427 if (vfslist == NULL && ((ep = strchr(argv[0], '@')) != NULL ||
428 (ep = strchr(argv[0], ':')) != NULL)) {
429 if (*ep == '@') {
430 cp = ep + 1;
431 ep = cp + strlen(cp);
432 } else
433 cp = argv[0];
434 while (cp != ep) {
435 if (!isdigit(*cp) && !isalpha(*cp) &&
436 *cp != '.' && *cp != '-' && *cp != ':')
437 break;
438 cp++;
439 }
440 if (cp == ep)
441 vfstype = "nfs";
442 }
443 rval = mountfs(vfstype,
444 argv[0], argv[1], init_flags, options, NULL);
445 break;
446 default:
447 usage();
448 /* NOTREACHED */
449 }
450
451 /*
452 * If the mount was successfully, and done by root, tell mountd the
453 * good news.
454 */
455 if (rval == 0 && getuid() == 0)
456 restart_mountd();
457
458 exit(rval);
459}
460
461int
462ismounted(struct fstab *fs, struct statfs *mntbuf, int mntsize)
463{
464 char realfsfile[PATH_MAX];
465 int i;
466
467 if (fs->fs_file[0] == '/' && fs->fs_file[1] == '\0')
468 /* the root file system can always be remounted */
469 return (0);
470
471 /* The user may have specified a symlink in fstab, resolve the path */
472 if (realpath(fs->fs_file, realfsfile) == NULL) {
473 /* Cannot resolve the path, use original one */
474 strlcpy(realfsfile, fs->fs_file, sizeof(realfsfile));
475 }
476
477 for (i = mntsize - 1; i >= 0; --i)
478 if (strcmp(realfsfile, mntbuf[i].f_mntonname) == 0 &&
479 (!isremountable(fs->fs_vfstype) ||
480 strcmp(fs->fs_spec, mntbuf[i].f_mntfromname) == 0))
481 return (1);
482 return (0);
483}
484
485int
486isremountable(const char *vfsname)
487{
488 const char **cp;
489
490 for (cp = remountable_fs_names; *cp; cp++)
491 if (strcmp(*cp, vfsname) == 0)
492 return (1);
493 return (0);
494}
495
496int
497hasopt(const char *mntopts, const char *option)
498{
499 int negative, found;
500 char *opt, *optbuf;
501
502 if (option[0] == 'n' && option[1] == 'o') {
503 negative = 1;
504 option += 2;
505 } else
506 negative = 0;
507 optbuf = strdup(mntopts);
508 found = 0;
509 for (opt = optbuf; (opt = strtok(opt, ",")) != NULL; opt = NULL) {
510 if (opt[0] == 'n' && opt[1] == 'o') {
511 if (!strcasecmp(opt + 2, option))
512 found = negative;
513 } else if (!strcasecmp(opt, option))
514 found = !negative;
515 }
516 free(optbuf);
517 return (found);
518}
519
520static void
521append_arg(struct cpa *sa, char *arg)
522{
523 if (sa->c + 1 == sa->sz) {
524 sa->sz = sa->sz == 0 ? 8 : sa->sz * 2;
525 sa->a = realloc(sa->a, sizeof(sa->a) * sa->sz);
526 if (sa->a == NULL)
527 errx(1, "realloc failed");
528 }
529 sa->a[++sa->c] = arg;
530}
531
532int
533mountfs(const char *vfstype, const char *spec, const char *name, int flags,
534 const char *options, const char *mntopts)
535{
536 struct statfs sf;
537 int i, ret;
538 char *optbuf, execname[PATH_MAX], mntpath[PATH_MAX];
539 static struct cpa mnt_argv;
540
541 /* resolve the mountpoint with realpath(3) */
|
543 name = mntpath;
544
545 if (mntopts == NULL)
546 mntopts = "";
547 optbuf = catopt(strdup(mntopts), options);
548
549 if (strcmp(name, "/") == 0)
550 flags |= MNT_UPDATE;
551 if (flags & MNT_FORCE)
552 optbuf = catopt(optbuf, "force");
553 if (flags & MNT_RDONLY)
554 optbuf = catopt(optbuf, "ro");
555 /*
556 * XXX
557 * The mount_mfs (newfs) command uses -o to select the
558 * optimization mode. We don't pass the default "-o rw"
559 * for that reason.
560 */
561 if (flags & MNT_UPDATE)
562 optbuf = catopt(optbuf, "update");
563
564 /* Compatibility glue. */
565 if (strcmp(vfstype, "msdos") == 0) {
566 warnx(
567 "Using \"-t msdosfs\", since \"-t msdos\" is deprecated.");
568 vfstype = "msdosfs";
569 }
570
571 /* Construct the name of the appropriate mount command */
572 (void)snprintf(execname, sizeof(execname), "mount_%s", vfstype);
573
574 mnt_argv.c = -1;
575 append_arg(&mnt_argv, execname);
576 mangle(optbuf, &mnt_argv);
577 if (mountprog != NULL)
578 strcpy(execname, mountprog);
579
580 append_arg(&mnt_argv, strdup(spec));
581 append_arg(&mnt_argv, strdup(name));
582 append_arg(&mnt_argv, NULL);
583
584 if (debug) {
585 if (use_mountprog(vfstype))
586 printf("exec: %s", execname);
587 else
588 printf("mount -t %s", vfstype);
589 for (i = 1; i < mnt_argv.c; i++)
590 (void)printf(" %s", mnt_argv.a[i]);
591 (void)printf("\n");
592 free(optbuf);
593 free(mountprog);
594 mountprog = NULL;
595 return (0);
596 }
597
598 if (use_mountprog(vfstype)) {
599 ret = exec_mountprog(name, execname, mnt_argv.a);
600 } else {
601 ret = mount_fs(vfstype, mnt_argv.c, mnt_argv.a);
602 }
603
604 free(optbuf);
605 free(mountprog);
606 mountprog = NULL;
607
608 if (verbose) {
609 if (statfs(name, &sf) < 0) {
610 warn("statfs %s", name);
611 return (1);
612 }
613 if (fstab_style)
614 putfsent(&sf);
615 else
616 prmount(&sf);
617 }
618
619 return (ret);
620}
621
622void
623prmount(struct statfs *sfp)
624{
625 uint64_t flags;
626 unsigned int i;
627 struct opt *o;
628 struct passwd *pw;
629
630 (void)printf("%s on %s (%s", sfp->f_mntfromname, sfp->f_mntonname,
631 sfp->f_fstypename);
632
633 flags = sfp->f_flags & MNT_VISFLAGMASK;
634 for (o = optnames; flags != 0 && o->o_opt != 0; o++)
635 if (flags & o->o_opt) {
636 (void)printf(", %s", o->o_name);
637 flags &= ~o->o_opt;
638 }
639 /*
640 * Inform when file system is mounted by an unprivileged user
641 * or privileged non-root user.
642 */
643 if ((flags & MNT_USER) != 0 || sfp->f_owner != 0) {
644 (void)printf(", mounted by ");
645 if ((pw = getpwuid(sfp->f_owner)) != NULL)
646 (void)printf("%s", pw->pw_name);
647 else
648 (void)printf("%d", sfp->f_owner);
649 }
650 if (verbose) {
651 if (sfp->f_syncwrites != 0 || sfp->f_asyncwrites != 0)
652 (void)printf(", writes: sync %ju async %ju",
653 (uintmax_t)sfp->f_syncwrites,
654 (uintmax_t)sfp->f_asyncwrites);
655 if (sfp->f_syncreads != 0 || sfp->f_asyncreads != 0)
656 (void)printf(", reads: sync %ju async %ju",
657 (uintmax_t)sfp->f_syncreads,
658 (uintmax_t)sfp->f_asyncreads);
659 if (sfp->f_fsid.val[0] != 0 || sfp->f_fsid.val[1] != 0) {
660 printf(", fsid ");
661 for (i = 0; i < sizeof(sfp->f_fsid); i++)
662 printf("%02x", ((u_char *)&sfp->f_fsid)[i]);
663 }
664 }
665 (void)printf(")\n");
666}
667
668struct statfs *
669getmntpt(const char *name)
670{
671 struct statfs *mntbuf;
672 int i, mntsize;
673
674 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT);
675 for (i = mntsize - 1; i >= 0; i--) {
676 if (strcmp(mntbuf[i].f_mntfromname, name) == 0 ||
677 strcmp(mntbuf[i].f_mntonname, name) == 0)
678 return (&mntbuf[i]);
679 }
680 return (NULL);
681}
682
683char *
684catopt(char *s0, const char *s1)
685{
686 size_t i;
687 char *cp;
688
689 if (s1 == NULL || *s1 == '\0')
690 return (s0);
691
692 if (s0 && *s0) {
693 i = strlen(s0) + strlen(s1) + 1 + 1;
694 if ((cp = malloc(i)) == NULL)
695 errx(1, "malloc failed");
696 (void)snprintf(cp, i, "%s,%s", s0, s1);
697 } else
698 cp = strdup(s1);
699
700 if (s0)
701 free(s0);
702 return (cp);
703}
704
705void
706mangle(char *options, struct cpa *a)
707{
708 char *p, *s, *val;
709
710 for (s = options; (p = strsep(&s, ",")) != NULL;)
711 if (*p != '\0') {
712 if (strcmp(p, "noauto") == 0) {
713 /*
714 * Do not pass noauto option to nmount().
715 * or external mount program. noauto is
716 * only used to prevent mounting a filesystem
717 * when 'mount -a' is specified, and is
718 * not a real mount option.
719 */
720 continue;
721 } else if (strcmp(p, "late") == 0) {
722 /*
723 * "late" is used to prevent certain file
724 * systems from being mounted before late
725 * in the boot cycle; for instance,
726 * loopback NFS mounts can't be mounted
727 * before mountd starts.
728 */
729 continue;
730 } else if (strcmp(p, "failok") == 0) {
731 /*
732 * "failok" is used to prevent certain file
733 * systems from being causing the system to
734 * drop into single user mode in the boot
735 * cycle, and is not a real mount option.
736 */
737 continue;
738 } else if (strncmp(p, "mountprog", 9) == 0) {
739 /*
740 * "mountprog" is used to force the use of
741 * userland mount programs.
742 */
743 val = strchr(p, '=');
744 if (val != NULL) {
745 ++val;
746 if (*val != '\0')
747 mountprog = strdup(val);
748 }
749
750 if (mountprog == NULL) {
751 errx(1, "Need value for -o mountprog");
752 }
753 continue;
754 } else if (strcmp(p, "userquota") == 0) {
755 continue;
756 } else if (strncmp(p, userquotaeq,
757 sizeof(userquotaeq) - 1) == 0) {
758 continue;
759 } else if (strcmp(p, "groupquota") == 0) {
760 continue;
761 } else if (strncmp(p, groupquotaeq,
762 sizeof(groupquotaeq) - 1) == 0) {
763 continue;
764 } else if (*p == '-') {
765 append_arg(a, p);
766 p = strchr(p, '=');
767 if (p != NULL) {
768 *p = '\0';
769 append_arg(a, p + 1);
770 }
771 } else {
772 append_arg(a, strdup("-o"));
773 append_arg(a, p);
774 }
775 }
776}
777
778
779char *
780update_options(char *opts, char *fstab, int curflags)
781{
782 char *o, *p;
783 char *cur;
784 char *expopt, *newopt, *tmpopt;
785
786 if (opts == NULL)
787 return (strdup(""));
788
789 /* remove meta options from list */
790 remopt(fstab, MOUNT_META_OPTION_FSTAB);
791 remopt(fstab, MOUNT_META_OPTION_CURRENT);
792 cur = flags2opts(curflags);
793
794 /*
795 * Expand all meta-options passed to us first.
796 */
797 expopt = NULL;
798 for (p = opts; (o = strsep(&p, ",")) != NULL;) {
799 if (strcmp(MOUNT_META_OPTION_FSTAB, o) == 0)
800 expopt = catopt(expopt, fstab);
801 else if (strcmp(MOUNT_META_OPTION_CURRENT, o) == 0)
802 expopt = catopt(expopt, cur);
803 else
804 expopt = catopt(expopt, o);
805 }
806 free(cur);
807 free(opts);
808
809 /*
810 * Remove previous contradictory arguments. Given option "foo" we
811 * remove all the "nofoo" options. Given "nofoo" we remove "nonofoo"
812 * and "foo" - so we can deal with possible options like "notice".
813 */
814 newopt = NULL;
815 for (p = expopt; (o = strsep(&p, ",")) != NULL;) {
816 if ((tmpopt = malloc( strlen(o) + 2 + 1 )) == NULL)
817 errx(1, "malloc failed");
818
819 strcpy(tmpopt, "no");
820 strcat(tmpopt, o);
821 remopt(newopt, tmpopt);
822 free(tmpopt);
823
824 if (strncmp("no", o, 2) == 0)
825 remopt(newopt, o+2);
826
827 newopt = catopt(newopt, o);
828 }
829 free(expopt);
830
831 return (newopt);
832}
833
834void
835remopt(char *string, const char *opt)
836{
837 char *o, *p, *r;
838
839 if (string == NULL || *string == '\0' || opt == NULL || *opt == '\0')
840 return;
841
842 r = string;
843
844 for (p = string; (o = strsep(&p, ",")) != NULL;) {
845 if (strcmp(opt, o) != 0) {
846 if (*r == ',' && *o != '\0')
847 r++;
848 while ((*r++ = *o++) != '\0')
849 ;
850 *--r = ',';
851 }
852 }
853 *r = '\0';
854}
855
856void
857usage(void)
858{
859
860 (void)fprintf(stderr, "%s\n%s\n%s\n",
861"usage: mount [-adflpruvw] [-F fstab] [-o options] [-t ufs | external_type]",
862" mount [-dfpruvw] special | node",
863" mount [-dfpruvw] [-o options] [-t ufs | external_type] special node");
864 exit(1);
865}
866
867void
868putfsent(struct statfs *ent)
869{
870 struct fstab *fst;
871 char *opts, *rw;
872 int l;
873
874 opts = NULL;
875 /* flags2opts() doesn't return the "rw" option. */
876 if ((ent->f_flags & MNT_RDONLY) != 0)
877 rw = NULL;
878 else
879 rw = catopt(NULL, "rw");
880
881 opts = flags2opts(ent->f_flags);
882 opts = catopt(rw, opts);
883
884 if (strncmp(ent->f_mntfromname, "<below>", 7) == 0 ||
885 strncmp(ent->f_mntfromname, "<above>", 7) == 0) {
886 strcpy(ent->f_mntfromname, (strnstr(ent->f_mntfromname, ":", 8)
887 +1));
888 }
889
890 l = strlen(ent->f_mntfromname);
891 printf("%s%s%s%s", ent->f_mntfromname,
892 l < 8 ? "\t" : "",
893 l < 16 ? "\t" : "",
894 l < 24 ? "\t" : " ");
895 l = strlen(ent->f_mntonname);
896 printf("%s%s%s%s", ent->f_mntonname,
897 l < 8 ? "\t" : "",
898 l < 16 ? "\t" : "",
899 l < 24 ? "\t" : " ");
900 printf("%s\t", ent->f_fstypename);
901 l = strlen(opts);
902 printf("%s%s", opts,
903 l < 8 ? "\t" : " ");
904 free(opts);
905
906 if ((fst = getfsspec(ent->f_mntfromname)))
907 printf("\t%u %u\n", fst->fs_freq, fst->fs_passno);
908 else if ((fst = getfsfile(ent->f_mntonname)))
909 printf("\t%u %u\n", fst->fs_freq, fst->fs_passno);
910 else if (strcmp(ent->f_fstypename, "ufs") == 0) {
911 if (strcmp(ent->f_mntonname, "/") == 0)
912 printf("\t1 1\n");
913 else
914 printf("\t2 2\n");
915 } else
916 printf("\t0 0\n");
917}
918
919
920char *
921flags2opts(int flags)
922{
923 char *res;
924
925 res = NULL;
926
927 if (flags & MNT_RDONLY) res = catopt(res, "ro");
928 if (flags & MNT_SYNCHRONOUS) res = catopt(res, "sync");
929 if (flags & MNT_NOEXEC) res = catopt(res, "noexec");
930 if (flags & MNT_NOSUID) res = catopt(res, "nosuid");
931 if (flags & MNT_UNION) res = catopt(res, "union");
932 if (flags & MNT_ASYNC) res = catopt(res, "async");
933 if (flags & MNT_NOATIME) res = catopt(res, "noatime");
934 if (flags & MNT_NOCLUSTERR) res = catopt(res, "noclusterr");
935 if (flags & MNT_NOCLUSTERW) res = catopt(res, "noclusterw");
936 if (flags & MNT_NOSYMFOLLOW) res = catopt(res, "nosymfollow");
937 if (flags & MNT_SUIDDIR) res = catopt(res, "suiddir");
938 if (flags & MNT_MULTILABEL) res = catopt(res, "multilabel");
939 if (flags & MNT_ACLS) res = catopt(res, "acls");
940 if (flags & MNT_NFS4ACLS) res = catopt(res, "nfsv4acls");
941
942 return (res);
943}
| 546 name = mntpath;
547
548 if (mntopts == NULL)
549 mntopts = "";
550 optbuf = catopt(strdup(mntopts), options);
551
552 if (strcmp(name, "/") == 0)
553 flags |= MNT_UPDATE;
554 if (flags & MNT_FORCE)
555 optbuf = catopt(optbuf, "force");
556 if (flags & MNT_RDONLY)
557 optbuf = catopt(optbuf, "ro");
558 /*
559 * XXX
560 * The mount_mfs (newfs) command uses -o to select the
561 * optimization mode. We don't pass the default "-o rw"
562 * for that reason.
563 */
564 if (flags & MNT_UPDATE)
565 optbuf = catopt(optbuf, "update");
566
567 /* Compatibility glue. */
568 if (strcmp(vfstype, "msdos") == 0) {
569 warnx(
570 "Using \"-t msdosfs\", since \"-t msdos\" is deprecated.");
571 vfstype = "msdosfs";
572 }
573
574 /* Construct the name of the appropriate mount command */
575 (void)snprintf(execname, sizeof(execname), "mount_%s", vfstype);
576
577 mnt_argv.c = -1;
578 append_arg(&mnt_argv, execname);
579 mangle(optbuf, &mnt_argv);
580 if (mountprog != NULL)
581 strcpy(execname, mountprog);
582
583 append_arg(&mnt_argv, strdup(spec));
584 append_arg(&mnt_argv, strdup(name));
585 append_arg(&mnt_argv, NULL);
586
587 if (debug) {
588 if (use_mountprog(vfstype))
589 printf("exec: %s", execname);
590 else
591 printf("mount -t %s", vfstype);
592 for (i = 1; i < mnt_argv.c; i++)
593 (void)printf(" %s", mnt_argv.a[i]);
594 (void)printf("\n");
595 free(optbuf);
596 free(mountprog);
597 mountprog = NULL;
598 return (0);
599 }
600
601 if (use_mountprog(vfstype)) {
602 ret = exec_mountprog(name, execname, mnt_argv.a);
603 } else {
604 ret = mount_fs(vfstype, mnt_argv.c, mnt_argv.a);
605 }
606
607 free(optbuf);
608 free(mountprog);
609 mountprog = NULL;
610
611 if (verbose) {
612 if (statfs(name, &sf) < 0) {
613 warn("statfs %s", name);
614 return (1);
615 }
616 if (fstab_style)
617 putfsent(&sf);
618 else
619 prmount(&sf);
620 }
621
622 return (ret);
623}
624
625void
626prmount(struct statfs *sfp)
627{
628 uint64_t flags;
629 unsigned int i;
630 struct opt *o;
631 struct passwd *pw;
632
633 (void)printf("%s on %s (%s", sfp->f_mntfromname, sfp->f_mntonname,
634 sfp->f_fstypename);
635
636 flags = sfp->f_flags & MNT_VISFLAGMASK;
637 for (o = optnames; flags != 0 && o->o_opt != 0; o++)
638 if (flags & o->o_opt) {
639 (void)printf(", %s", o->o_name);
640 flags &= ~o->o_opt;
641 }
642 /*
643 * Inform when file system is mounted by an unprivileged user
644 * or privileged non-root user.
645 */
646 if ((flags & MNT_USER) != 0 || sfp->f_owner != 0) {
647 (void)printf(", mounted by ");
648 if ((pw = getpwuid(sfp->f_owner)) != NULL)
649 (void)printf("%s", pw->pw_name);
650 else
651 (void)printf("%d", sfp->f_owner);
652 }
653 if (verbose) {
654 if (sfp->f_syncwrites != 0 || sfp->f_asyncwrites != 0)
655 (void)printf(", writes: sync %ju async %ju",
656 (uintmax_t)sfp->f_syncwrites,
657 (uintmax_t)sfp->f_asyncwrites);
658 if (sfp->f_syncreads != 0 || sfp->f_asyncreads != 0)
659 (void)printf(", reads: sync %ju async %ju",
660 (uintmax_t)sfp->f_syncreads,
661 (uintmax_t)sfp->f_asyncreads);
662 if (sfp->f_fsid.val[0] != 0 || sfp->f_fsid.val[1] != 0) {
663 printf(", fsid ");
664 for (i = 0; i < sizeof(sfp->f_fsid); i++)
665 printf("%02x", ((u_char *)&sfp->f_fsid)[i]);
666 }
667 }
668 (void)printf(")\n");
669}
670
671struct statfs *
672getmntpt(const char *name)
673{
674 struct statfs *mntbuf;
675 int i, mntsize;
676
677 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT);
678 for (i = mntsize - 1; i >= 0; i--) {
679 if (strcmp(mntbuf[i].f_mntfromname, name) == 0 ||
680 strcmp(mntbuf[i].f_mntonname, name) == 0)
681 return (&mntbuf[i]);
682 }
683 return (NULL);
684}
685
686char *
687catopt(char *s0, const char *s1)
688{
689 size_t i;
690 char *cp;
691
692 if (s1 == NULL || *s1 == '\0')
693 return (s0);
694
695 if (s0 && *s0) {
696 i = strlen(s0) + strlen(s1) + 1 + 1;
697 if ((cp = malloc(i)) == NULL)
698 errx(1, "malloc failed");
699 (void)snprintf(cp, i, "%s,%s", s0, s1);
700 } else
701 cp = strdup(s1);
702
703 if (s0)
704 free(s0);
705 return (cp);
706}
707
708void
709mangle(char *options, struct cpa *a)
710{
711 char *p, *s, *val;
712
713 for (s = options; (p = strsep(&s, ",")) != NULL;)
714 if (*p != '\0') {
715 if (strcmp(p, "noauto") == 0) {
716 /*
717 * Do not pass noauto option to nmount().
718 * or external mount program. noauto is
719 * only used to prevent mounting a filesystem
720 * when 'mount -a' is specified, and is
721 * not a real mount option.
722 */
723 continue;
724 } else if (strcmp(p, "late") == 0) {
725 /*
726 * "late" is used to prevent certain file
727 * systems from being mounted before late
728 * in the boot cycle; for instance,
729 * loopback NFS mounts can't be mounted
730 * before mountd starts.
731 */
732 continue;
733 } else if (strcmp(p, "failok") == 0) {
734 /*
735 * "failok" is used to prevent certain file
736 * systems from being causing the system to
737 * drop into single user mode in the boot
738 * cycle, and is not a real mount option.
739 */
740 continue;
741 } else if (strncmp(p, "mountprog", 9) == 0) {
742 /*
743 * "mountprog" is used to force the use of
744 * userland mount programs.
745 */
746 val = strchr(p, '=');
747 if (val != NULL) {
748 ++val;
749 if (*val != '\0')
750 mountprog = strdup(val);
751 }
752
753 if (mountprog == NULL) {
754 errx(1, "Need value for -o mountprog");
755 }
756 continue;
757 } else if (strcmp(p, "userquota") == 0) {
758 continue;
759 } else if (strncmp(p, userquotaeq,
760 sizeof(userquotaeq) - 1) == 0) {
761 continue;
762 } else if (strcmp(p, "groupquota") == 0) {
763 continue;
764 } else if (strncmp(p, groupquotaeq,
765 sizeof(groupquotaeq) - 1) == 0) {
766 continue;
767 } else if (*p == '-') {
768 append_arg(a, p);
769 p = strchr(p, '=');
770 if (p != NULL) {
771 *p = '\0';
772 append_arg(a, p + 1);
773 }
774 } else {
775 append_arg(a, strdup("-o"));
776 append_arg(a, p);
777 }
778 }
779}
780
781
782char *
783update_options(char *opts, char *fstab, int curflags)
784{
785 char *o, *p;
786 char *cur;
787 char *expopt, *newopt, *tmpopt;
788
789 if (opts == NULL)
790 return (strdup(""));
791
792 /* remove meta options from list */
793 remopt(fstab, MOUNT_META_OPTION_FSTAB);
794 remopt(fstab, MOUNT_META_OPTION_CURRENT);
795 cur = flags2opts(curflags);
796
797 /*
798 * Expand all meta-options passed to us first.
799 */
800 expopt = NULL;
801 for (p = opts; (o = strsep(&p, ",")) != NULL;) {
802 if (strcmp(MOUNT_META_OPTION_FSTAB, o) == 0)
803 expopt = catopt(expopt, fstab);
804 else if (strcmp(MOUNT_META_OPTION_CURRENT, o) == 0)
805 expopt = catopt(expopt, cur);
806 else
807 expopt = catopt(expopt, o);
808 }
809 free(cur);
810 free(opts);
811
812 /*
813 * Remove previous contradictory arguments. Given option "foo" we
814 * remove all the "nofoo" options. Given "nofoo" we remove "nonofoo"
815 * and "foo" - so we can deal with possible options like "notice".
816 */
817 newopt = NULL;
818 for (p = expopt; (o = strsep(&p, ",")) != NULL;) {
819 if ((tmpopt = malloc( strlen(o) + 2 + 1 )) == NULL)
820 errx(1, "malloc failed");
821
822 strcpy(tmpopt, "no");
823 strcat(tmpopt, o);
824 remopt(newopt, tmpopt);
825 free(tmpopt);
826
827 if (strncmp("no", o, 2) == 0)
828 remopt(newopt, o+2);
829
830 newopt = catopt(newopt, o);
831 }
832 free(expopt);
833
834 return (newopt);
835}
836
837void
838remopt(char *string, const char *opt)
839{
840 char *o, *p, *r;
841
842 if (string == NULL || *string == '\0' || opt == NULL || *opt == '\0')
843 return;
844
845 r = string;
846
847 for (p = string; (o = strsep(&p, ",")) != NULL;) {
848 if (strcmp(opt, o) != 0) {
849 if (*r == ',' && *o != '\0')
850 r++;
851 while ((*r++ = *o++) != '\0')
852 ;
853 *--r = ',';
854 }
855 }
856 *r = '\0';
857}
858
859void
860usage(void)
861{
862
863 (void)fprintf(stderr, "%s\n%s\n%s\n",
864"usage: mount [-adflpruvw] [-F fstab] [-o options] [-t ufs | external_type]",
865" mount [-dfpruvw] special | node",
866" mount [-dfpruvw] [-o options] [-t ufs | external_type] special node");
867 exit(1);
868}
869
870void
871putfsent(struct statfs *ent)
872{
873 struct fstab *fst;
874 char *opts, *rw;
875 int l;
876
877 opts = NULL;
878 /* flags2opts() doesn't return the "rw" option. */
879 if ((ent->f_flags & MNT_RDONLY) != 0)
880 rw = NULL;
881 else
882 rw = catopt(NULL, "rw");
883
884 opts = flags2opts(ent->f_flags);
885 opts = catopt(rw, opts);
886
887 if (strncmp(ent->f_mntfromname, "<below>", 7) == 0 ||
888 strncmp(ent->f_mntfromname, "<above>", 7) == 0) {
889 strcpy(ent->f_mntfromname, (strnstr(ent->f_mntfromname, ":", 8)
890 +1));
891 }
892
893 l = strlen(ent->f_mntfromname);
894 printf("%s%s%s%s", ent->f_mntfromname,
895 l < 8 ? "\t" : "",
896 l < 16 ? "\t" : "",
897 l < 24 ? "\t" : " ");
898 l = strlen(ent->f_mntonname);
899 printf("%s%s%s%s", ent->f_mntonname,
900 l < 8 ? "\t" : "",
901 l < 16 ? "\t" : "",
902 l < 24 ? "\t" : " ");
903 printf("%s\t", ent->f_fstypename);
904 l = strlen(opts);
905 printf("%s%s", opts,
906 l < 8 ? "\t" : " ");
907 free(opts);
908
909 if ((fst = getfsspec(ent->f_mntfromname)))
910 printf("\t%u %u\n", fst->fs_freq, fst->fs_passno);
911 else if ((fst = getfsfile(ent->f_mntonname)))
912 printf("\t%u %u\n", fst->fs_freq, fst->fs_passno);
913 else if (strcmp(ent->f_fstypename, "ufs") == 0) {
914 if (strcmp(ent->f_mntonname, "/") == 0)
915 printf("\t1 1\n");
916 else
917 printf("\t2 2\n");
918 } else
919 printf("\t0 0\n");
920}
921
922
923char *
924flags2opts(int flags)
925{
926 char *res;
927
928 res = NULL;
929
930 if (flags & MNT_RDONLY) res = catopt(res, "ro");
931 if (flags & MNT_SYNCHRONOUS) res = catopt(res, "sync");
932 if (flags & MNT_NOEXEC) res = catopt(res, "noexec");
933 if (flags & MNT_NOSUID) res = catopt(res, "nosuid");
934 if (flags & MNT_UNION) res = catopt(res, "union");
935 if (flags & MNT_ASYNC) res = catopt(res, "async");
936 if (flags & MNT_NOATIME) res = catopt(res, "noatime");
937 if (flags & MNT_NOCLUSTERR) res = catopt(res, "noclusterr");
938 if (flags & MNT_NOCLUSTERW) res = catopt(res, "noclusterw");
939 if (flags & MNT_NOSYMFOLLOW) res = catopt(res, "nosymfollow");
940 if (flags & MNT_SUIDDIR) res = catopt(res, "suiddir");
941 if (flags & MNT_MULTILABEL) res = catopt(res, "multilabel");
942 if (flags & MNT_ACLS) res = catopt(res, "acls");
943 if (flags & MNT_NFS4ACLS) res = catopt(res, "nfsv4acls");
944
945 return (res);
946}
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