1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22 /*
23 * Copyright 2015 Nexenta Systems, Inc. All rights reserved.
24 */
25
26 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
27 /* All Rights Reserved */
28
29
30 /*
31 * Copyright 2010 Sun Microsystems, Inc. All rights reserved.
32 * Use is subject to license terms.
33 */
34
35 #include <stdio.h>
36 #include <stdio_ext.h>
37 #include <limits.h>
38 #include <fcntl.h>
39 #include <unistd.h>
40 #include <stdlib.h>
41 #include <string.h>
42 #include <stdarg.h>
43 #include <sys/types.h>
44 #include <sys/stat.h>
45 #include <sys/statvfs.h>
46 #include <errno.h>
47 #include <sys/mnttab.h>
48 #include <sys/mntent.h>
49 #include <sys/mount.h>
50 #include <sys/vfstab.h>
51 #include <sys/param.h>
52 #include <sys/wait.h>
53 #include <sys/signal.h>
54 #include <sys/resource.h>
55 #include <stropts.h>
56 #include <sys/conf.h>
57 #include <locale.h>
58 #include "fslib.h"
59
60 #define VFS_PATH "/usr/lib/fs"
61 #define ALT_PATH "/etc/fs"
62 #define REMOTE "/etc/dfs/fstypes"
63
64 #define ARGV_MAX 16
65 #define TIME_MAX 50
66 #define FSTYPE_MAX 8
67 #define REMOTE_MAX 64
68
69 #define OLD 0
70 #define NEW 1
71
72 #define READONLY 0
73 #define READWRITE 1
74 #define SUID 2
75 #define NOSUID 3
76 #define SETUID 4
77 #define NOSETUID 5
78 #define DEVICES 6
79 #define NODEVICES 7
80
81 #define FORMAT "%a %b %e %H:%M:%S %Y\n" /* date time format */
82 /* a - abbreviated weekday name */
83 /* b - abbreviated month name */
84 /* e - day of month */
85 /* H - hour */
86 /* M - minute */
87 /* S - second */
88 /* Y - Year */
89 /* n - newline */
90
91 /*
92 * The fs-local method understands this exit code to mean that one or
93 * more failures occurred and that all the failures were of attempted
94 * lofs mounts.
95 */
96 #define ALL_LOFS_FAILURES 111
97
98 extern int optind;
99 extern char *optarg;
100
101 extern void usage(void);
102 extern char *flags(char *, int);
103 extern char *remote(char *, FILE *);
104 extern char *default_fstype(char *);
105
106 char *myopts[] = {
107 MNTOPT_RO,
108 MNTOPT_RW,
109 MNTOPT_SUID,
110 MNTOPT_NOSUID,
111 MNTOPT_SETUID,
112 MNTOPT_NOSETUID,
113 MNTOPT_DEVICES,
114 MNTOPT_NODEVICES,
115 NULL
116 };
117
118 static char *myname; /* point to argv[0] */
119
120 /*
121 * Set the limit to double the number of characters a user should be allowed to
122 * type in one line.
123 * This should cover the different shells, which don't use POSIX_MAX_INPUT,
124 * and should cover the case where a long option string can be in
125 * the /etc/vfstab file.
126 */
127 char mntflags[(_POSIX_MAX_INPUT+1) * 2];
128
129 char realdir[MAXPATHLEN]; /* buffer for realpath() calls */
130 char *vfstab = VFSTAB;
131 char *mnttab = MNTTAB;
132 char *specific_opts; /* holds specific mount options */
133 char *generic_opts; /* holds generic mount options */
134 int maxrun;
135 int nrun;
136 int failcnt; /* total count of failures */
137 int lofscnt; /* presence of lofs prohibits parallel */
138 /* mounting */
139 int lofsfail; /* count of failures of lofs mounts */
140 int exitcode;
141 int aflg, cflg, fflg, Fflg, gflg, oflg, pflg, rflg, vflg, Vflg, mflg, Oflg,
142 dashflg, questflg, dflg, qflg;
143
144
145 /*
146 * Each vfsent_t describes a vfstab entry. It is used to manage and cleanup
147 * each child that performs the particular mount for the entry.
148 */
149
150 typedef struct vfsent {
151 struct vfstab v; /* the vfstab entry */
152 char *rpath; /* resolved pathname so far */
153 int mlevel; /* how deep is this mount point */
154 int order; /* vfstab serial order of this vfs */
155 int flag;
156 pid_t pid; /* the pid of this mount process */
157 int exitcode; /* process's exitcode */
158 #define RDPIPE 0
159 #define WRPIPE 1
160 int sopipe[2]; /* pipe attached to child's stdout */
161 int sepipe[2]; /* pipe attached to child's stderr */
162 struct vfsent *next; /* used when in linked list */
163 } vfsent_t;
164
165 #define VRPFAILED 0x01 /* most recent realpath failed on */
166 /* this mount point */
167 #define VNOTMOUNTED 0x02 /* mount point could not be mounted */
168
169 vfsent_t *vfsll, *vfslltail; /* head and tail of the global */
170 /* linked list of vfstab entries */
171 vfsent_t **vfsarray; /* global array of vfsent_t's */
172 int vfsarraysize; /* length of the list */
173
174 /*
175 * This structure is used to build a linked list of
176 * mnttab structures from /etc/mnttab.
177 */
178 typedef struct mountent {
179 struct extmnttab *ment;
180 int flag;
181 struct mountent *next;
182 } mountent_t;
183
184 #define MSORTED 0x1
185
186 static vfsent_t **make_vfsarray(char **, int);
187 static vfsent_t *new_vfsent(struct vfstab *, int);
188 static vfsent_t *getvfsall(char *, int);
189
190 static void doexec(char *, char **);
191 static void nomem();
192 static void cleanup(int);
193 static char *setrpath(vfsent_t *);
194 static int dowait();
195 static int setup_iopipe(vfsent_t *);
196 static void setup_output(vfsent_t *);
197 static void doio(vfsent_t *);
198 static void do_mounts();
199 static int parmount(char **, int, char *);
200 static int mlevelcmp(const void *, const void *);
201 static int mordercmp(const void *, const void *);
202 static int check_fields(char *, char *);
203 static int cleanupkid(pid_t, int);
204 static void print_mnttab(int, int);
205 static void vfserror(int, char *);
206 static void mnterror(int);
207 static int ignore(char *);
208
209 /*
210 * This is /usr/sbin/mount: the generic command that in turn
211 * execs the appropriate /usr/lib/fs/{fstype}/mount.
212 * The -F flag and argument are NOT passed.
213 * If the usr file system is not mounted a duplicate copy
214 * can be found in /sbin and this version execs the
215 * appropriate /etc/fs/{fstype}/mount
216 *
217 * If the -F fstype, special or directory are missing,
218 * /etc/vfstab is searched to fill in the missing arguments.
219 *
220 * -V will print the built command on the stdout.
221 * It isn't passed either.
222 */
223 int
224 main(int argc, char *argv[])
225 {
226 char *special, /* argument of special/resource */
227 *mountp, /* argument of mount directory */
228 *fstype, /* wherein the fstype name is filled */
229 *newargv[ARGV_MAX], /* arg list for specific command */
230 *farg = NULL, *Farg = NULL;
231 int ii, ret, cc, fscnt;
232 struct stat64 stbuf;
233 struct vfstab vget, vref;
234 mode_t mode;
235 FILE *fd;
236
237 (void) setlocale(LC_ALL, "");
238
239 #if !defined(TEXT_DOMAIN)
240 #define TEXT_DOMAIN "SYS_TEST"
241 #endif
242 (void) textdomain(TEXT_DOMAIN);
243
244 myname = strrchr(argv[0], '/');
245 if (myname)
246 myname++;
247 else
248 myname = argv[0];
249 if (myname == 0) myname = "path unknown";
250
251 /* Process the args. */
252
253 while ((cc = getopt(argc, argv, "?acd:f:F:gmno:pqrvVO")) != -1)
254 switch (cc) {
255 case 'a':
256 aflg++;
257 break;
258 case 'c':
259 cflg++;
260 break;
261
262 #ifdef DEBUG
263 case 'd':
264 dflg = atoi(optarg);
265 break;
266 #endif
267
268 case 'f':
269 fflg++;
270 farg = optarg;
271 break;
272 case 'F':
273 Fflg++;
274 Farg = optarg;
275 break;
276 case 'g':
277 gflg++;
278 break;
279 case 'm':
280 mflg++;
281 break; /* do not update /etc/mnttab */
282 case 'o':
283 oflg++;
284 if ((specific_opts = strdup(optarg)) == NULL)
285 nomem();
286 break; /* fstype dependent options */
287 case 'O':
288 Oflg++;
289 break;
290 case 'p':
291 pflg++;
292 break;
293 case 'q':
294 qflg++;
295 break;
296 case 'r':
297 rflg++;
298 generic_opts = "ro";
299 break;
300 case 'v':
301 vflg++;
302 break;
303 case 'V':
304 Vflg++;
305 break;
306 case '?':
307 questflg++;
308 break;
309 }
310
311 /* copy '--' to specific */
312 if (strcmp(argv[optind-1], "--") == 0)
313 dashflg++;
314
315 /* option checking */
316 /* more than two args not allowed if !aflg */
317 if (!aflg && (argc - optind > 2))
318 usage();
319
320 /* pv mututally exclusive */
321 if (pflg + vflg + aflg > 1) {
322 fprintf(stderr, gettext
323 ("%s: -a, -p, and -v are mutually exclusive\n"),
324 myname);
325 usage();
326 }
327
328 /*
329 * Can't have overlaying mounts on the same mount point during
330 * a parallel mount.
331 */
332 if (aflg && Oflg) {
333 fprintf(stderr, gettext
334 ("%s: -a and -O are mutually exclusive\n"), myname);
335 usage();
336 }
337
338 /* dfF mutually exclusive */
339 if (fflg + Fflg > 1) {
340 fprintf(stderr, gettext
341 ("%s: More than one FSType specified\n"), myname);
342 usage();
343 }
344
345 /* no arguments, only allow p,v,V or [F]? */
346 if (!aflg && optind == argc) {
347 if (cflg || fflg || mflg || oflg || rflg || qflg)
348 usage();
349
350 if (Fflg && !questflg)
351 usage();
352
353 if (questflg) {
354 if (Fflg) {
355 newargv[2] = "-?";
356 newargv[3] = NULL;
357 doexec(Farg, newargv);
358 }
359 usage();
360 }
361 }
362
363 if (questflg)
364 usage();
365
366 /* one or two args, allow any but p,v */
367 if (optind != argc && (pflg || vflg)) {
368 fprintf(stderr,
369 gettext("%s: Cannot use -p and -v with arguments\n"), myname);
370 usage();
371 }
372
373
374 /* if only reporting mnttab, generic prints mnttab and exits */
375 if (!aflg && optind == argc) {
376 if (Vflg) {
377 printf("%s", myname);
378 if (pflg)
379 printf(" -p");
380 if (vflg)
381 printf(" -v");
382 printf("\n");
383 exit(0);
384 }
385
386 print_mnttab(vflg, pflg);
387 exit(0);
388 }
389
390 /*
391 * Get filesystem type here. If "-F FStype" is specified, use
392 * that fs type. Otherwise, determine the fs type from /etc/vfstab
393 * if the entry exists. Otherwise, determine the local or remote
394 * fs type from /etc/default/df or /etc/dfs/fstypes respectively.
395 */
396 if (fflg) {
397 if ((strcmp(farg, "S51K") != 0) &&
398 (strcmp(farg, "S52K") != 0)) {
399 fstype = farg;
400 }
401 else
402 fstype = "ufs";
403 } else /* if (Fflg) */
404 fstype = Farg;
405
406 fscnt = argc - optind;
407 if (aflg && (fscnt != 1))
408 exit(parmount(argv + optind, fscnt, fstype));
409
410 /*
411 * Then don't bother with the parallel over head. Everything
412 * from this point is simple/normal single execution.
413 */
414 aflg = 0;
415
416 /* get special and/or mount-point from arg(s) */
417 if (fscnt == 2)
418 special = argv[optind++];
419 else
420 special = NULL;
421 if (optind < argc)
422 mountp = argv[optind++];
423 else
424 mountp = NULL;
425
426 /* lookup only if we need to */
427 if (fstype == NULL || specific_opts == NULL || special == NULL ||
428 mountp == NULL) {
429 if ((fd = fopen(vfstab, "r")) == NULL) {
430 if (fstype == NULL || special == NULL ||
431 mountp == NULL) {
432 fprintf(stderr, gettext(
433 "%s: Cannot open %s\n"),
434 myname, vfstab);
435 exit(1);
436 } else {
437 /*
438 * No vfstab, but we know what we want
439 * to mount.
440 */
441 goto out;
442 }
443 }
444 vfsnull(&vref);
445 vref.vfs_special = special;
446 vref.vfs_mountp = mountp;
447 vref.vfs_fstype = fstype;
448
449 /* get a vfstab entry matching mountp or special */
450 while ((ret = getvfsany(fd, &vget, &vref)) > 0)
451 vfserror(ret, vget.vfs_special);
452
453 /* if no entry and there was only one argument */
454 /* then the argument could be the special */
455 /* and not mount point as we thought earlier */
456 if (ret == -1 && special == NULL) {
457 rewind(fd);
458 special = vref.vfs_special = mountp;
459 mountp = vref.vfs_mountp = NULL;
460 /* skip erroneous lines; they were reported above */
461 while ((ret = getvfsany(fd, &vget, &vref)) > 0)
462 ;
463 }
464
465 fclose(fd);
466
467 if (ret == 0) {
468 if (fstype == NULL)
469 fstype = vget.vfs_fstype;
470 if (special == NULL)
471 special = vget.vfs_special;
472 if (mountp == NULL)
473 mountp = vget.vfs_mountp;
474 if (oflg == 0 && vget.vfs_mntopts) {
475 oflg++;
476 specific_opts = vget.vfs_mntopts;
477 }
478 } else if (special == NULL) {
479 if (stat64(mountp, &stbuf) == -1) {
480 fprintf(stderr, gettext("%s: cannot stat %s\n"),
481 myname, mountp);
482 exit(2);
483 }
484 if (((mode = (stbuf.st_mode & S_IFMT)) == S_IFBLK) ||
485 (mode == S_IFCHR)) {
486 fprintf(stderr,
487 gettext("%s: mount point cannot be determined\n"),
488 myname);
489 exit(1);
490 } else
491 {
492 fprintf(stderr,
493 gettext("%s: special cannot be determined\n"),
494 myname);
495 exit(1);
496 }
497 } else if (fstype == NULL)
498 fstype = default_fstype(special);
499 }
500
501 out:
502 if (realpath(mountp, realdir) == NULL) {
503 (void) fprintf(stderr, "mount: ");
504 perror(mountp);
505 exit(1);
506 }
507
508 if ((mountp = strdup(realdir)) == NULL)
509 nomem();
510
511 if (check_fields(fstype, mountp))
512 exit(1);
513
514 /* create the new arg list, and end the list with a null pointer */
515 ii = 2;
516 if (cflg)
517 newargv[ii++] = "-c";
518 if (gflg)
519 newargv[ii++] = "-g";
520 if (mflg)
521 newargv[ii++] = "-m";
522 /*
523 * The q option needs to go before the -o option as some
524 * filesystems complain during first pass option parsing.
525 */
526 if (qflg)
527 newargv[ii++] = "-q";
528 if (oflg) {
529 newargv[ii++] = "-o";
530 newargv[ii++] = specific_opts;
531 }
532 if (Oflg)
533 newargv[ii++] = "-O";
534 if (rflg)
535 newargv[ii++] = "-r";
536 if (dashflg)
537 newargv[ii++] = "--";
538 newargv[ii++] = special;
539 newargv[ii++] = mountp;
540 newargv[ii] = NULL;
541
542 doexec(fstype, newargv);
543 return (0);
544 }
545
546 void
547 usage(void)
548 {
549 fprintf(stderr, gettext("Usage:\n%s [-v | -p]\n"), myname);
550 fprintf(stderr, gettext(
551 "%s [-F FSType] [-V] [current_options] [-o specific_options]"),
552 myname);
553 fprintf(stderr, gettext("\n\t{special | mount_point}\n"));
554
555 fprintf(stderr, gettext(
556 "%s [-F FSType] [-V] [current_options] [-o specific_options]"),
557 myname);
558 fprintf(stderr, gettext("\n\tspecial mount_point\n"));
559
560 fprintf(stderr, gettext(
561 "%s -a [-F FSType ] [-V] [current_options] [-o specific_options]\n"),
562 myname);
563 fprintf(stderr, gettext("\t[mount_point ...]\n"));
564
565 exit(1);
566 }
567
568 /*
569 * Get rid of "dev=[hex string]" clause, if any. It's not legal
570 * when printing in vfstab format.
571 */
572 void
573 elide_dev(char *mntopts)
574 {
575 char *dev, *other;
576
577 if (mntopts != NULL) {
578 dev = strstr(mntopts, "dev=");
579 if (dev != NULL) {
580 other = strpbrk(dev, ",");
581 if (other == NULL) {
582 /* last option */
583 if (dev != mntopts) {
584 *--dev = '\0';
585 } else {
586 *dev = '\0';
587 }
588 } else {
589 /* first or intermediate option */
590 memmove(dev, other+1, strlen(other+1)+1);
591 }
592 }
593 }
594 }
595
596 void
597 print_mnttab(int vflg, int pflg)
598 {
599 FILE *fd;
600 FILE *rfp; /* this will be NULL if fopen fails */
601 int ret;
602 char time_buf[TIME_MAX]; /* array to hold date and time */
603 struct extmnttab mget;
604 time_t ltime;
605
606 if ((fd = fopen(mnttab, "r")) == NULL) {
607 fprintf(stderr, gettext("%s: Cannot open mnttab\n"), myname);
608 exit(1);
609 }
610 rfp = fopen(REMOTE, "r");
611 while ((ret = getextmntent(fd, &mget, sizeof (struct extmnttab)))
612 == 0) {
613 if (ignore(mget.mnt_mntopts))
614 continue;
615 if (mget.mnt_special && mget.mnt_mountp &&
616 mget.mnt_fstype && mget.mnt_time) {
617 ltime = atol(mget.mnt_time);
618 cftime(time_buf, FORMAT, <ime);
619 if (pflg) {
620 elide_dev(mget.mnt_mntopts);
621 printf("%s - %s %s - no %s\n",
622 mget.mnt_special,
623 mget.mnt_mountp,
624 mget.mnt_fstype,
625 mget.mnt_mntopts != NULL ?
626 mget.mnt_mntopts : "-");
627 } else if (vflg) {
628 printf("%s on %s type %s %s%s on %s",
629 mget.mnt_special,
630 mget.mnt_mountp,
631 mget.mnt_fstype,
632 remote(mget.mnt_fstype, rfp),
633 flags(mget.mnt_mntopts, NEW),
634 time_buf);
635 } else
636 printf("%s on %s %s%s on %s",
637 mget.mnt_mountp,
638 mget.mnt_special,
639 remote(mget.mnt_fstype, rfp),
640 flags(mget.mnt_mntopts, OLD),
641 time_buf);
642 }
643 }
644 if (ret > 0)
645 mnterror(ret);
646 }
647
648 char *
649 flags(char *mntopts, int flag)
650 {
651 char opts[sizeof (mntflags)];
652 char *value;
653 int rdwr = 1;
654 int suid = 1;
655 int devices = 1;
656 int setuid = 1;
657
658 if (mntopts == NULL || *mntopts == '\0')
659 return ("read/write/setuid/devices");
660
661 strcpy(opts, "");
662 while (*mntopts != '\0') {
663 switch (getsubopt(&mntopts, myopts, &value)) {
664 case READONLY:
665 rdwr = 0;
666 break;
667 case READWRITE:
668 rdwr = 1;
669 break;
670 case SUID:
671 suid = 1;
672 break;
673 case NOSUID:
674 suid = 0;
675 break;
676 case SETUID:
677 setuid = 1;
678 break;
679 case NOSETUID:
680 setuid = 0;
681 break;
682 case DEVICES:
683 devices = 1;
684 break;
685 case NODEVICES:
686 devices = 0;
687 break;
688 default:
689 /* cat '/' separator to mntflags */
690 if (*opts != '\0' && value != NULL)
691 strcat(opts, "/");
692 strcat(opts, value);
693 break;
694 }
695 }
696
697 strcpy(mntflags, "");
698 if (rdwr)
699 strcat(mntflags, "read/write");
700 else if (flag == OLD)
701 strcat(mntflags, "read only");
702 else
703 strcat(mntflags, "read-only");
704 if (suid) {
705 if (setuid)
706 strcat(mntflags, "/setuid");
707 else
708 strcat(mntflags, "/nosetuid");
709 if (devices)
710 strcat(mntflags, "/devices");
711 else
712 strcat(mntflags, "/nodevices");
713 } else {
714 strcat(mntflags, "/nosetuid/nodevices");
715 }
716 if (*opts != '\0') {
717 strcat(mntflags, "/");
718 strcat(mntflags, opts);
719 }
720
721 /*
722 * The assumed assertion
723 * assert (strlen(mntflags) < sizeof mntflags);
724 * is valid at this point in the code. Note that a call to "assert"
725 * is not appropriate in production code since it halts the program.
726 */
727 return (mntflags);
728 }
729
730 char *
731 remote(char *fstype, FILE *rfp)
732 {
733 char buf[BUFSIZ];
734 char *fs;
735 extern char *strtok();
736
737 if (rfp == NULL || fstype == NULL ||
738 strlen(fstype) > (size_t)FSTYPE_MAX)
739 return (""); /* not a remote */
740 rewind(rfp);
741 while (fgets(buf, sizeof (buf), rfp) != NULL) {
742 fs = strtok(buf, " \t\n");
743 if (strcmp(fstype, fs) == 0)
744 return ("remote/"); /* is a remote fs */
745 }
746 return (""); /* not a remote */
747 }
748
749
750 void
751 vfserror(int flag, char *special)
752 {
753 if (special == NULL)
754 special = "<null>";
755 switch (flag) {
756 case VFS_TOOLONG:
757 fprintf(stderr,
758 gettext("%s: Warning: Line in vfstab for \"%s\" exceeds %d characters\n"),
759 myname, special, VFS_LINE_MAX-1);
760 break;
761 case VFS_TOOFEW:
762 fprintf(stderr,
763 gettext("%s: Warning: Line for \"%s\" in vfstab has too few entries\n"),
764 myname, special);
765 break;
766 case VFS_TOOMANY:
767 fprintf(stderr,
768 gettext("%s: Warning: Line for \"%s\" in vfstab has too many entries\n"),
769 myname, special);
770 break;
771 default:
772 fprintf(stderr, gettext(
773 "%s: Warning: Error in line for \"%s\" in vfstab\n"),
774 myname, special);
775 }
776 }
777
778 void
779 mnterror(int flag)
780 {
781 switch (flag) {
782 case MNT_TOOLONG:
783 fprintf(stderr,
784 gettext("%s: Line in mnttab exceeds %d characters\n"),
785 myname, MNT_LINE_MAX-2);
786 break;
787 case MNT_TOOFEW:
788 fprintf(stderr,
789 gettext("%s: Line in mnttab has too few entries\n"),
790 myname);
791 break;
792 case MNT_TOOMANY:
793 fprintf(stderr,
794 gettext("%s: Line in mnttab has too many entries\n"),
795 myname);
796 break;
797 }
798 exit(1);
799 }
800
801 void
802 doexec(char *fstype, char *newargv[])
803 {
804 char full_path[PATH_MAX];
805 char alter_path[PATH_MAX];
806 char *vfs_path = VFS_PATH;
807 char *alt_path = ALT_PATH;
808 int i;
809
810 /* build the full pathname of the fstype dependent command. */
811 sprintf(full_path, "%s/%s/%s", vfs_path, fstype, myname);
812 sprintf(alter_path, "%s/%s/%s", alt_path, fstype, myname);
813 newargv[1] = myname;
814
815 if (Vflg) {
816 printf("%s -F %s", newargv[1], fstype);
817 for (i = 2; newargv[i]; i++)
818 printf(" %s", newargv[i]);
819 printf("\n");
820 fflush(stdout);
821 exit(0);
822 }
823
824 /*
825 * Try to exec the fstype dependent portion of the mount.
826 * See if the directory is there before trying to exec dependent
827 * portion. This is only useful for eliminating the
828 * '..mount: not found' message when '/usr' is mounted
829 */
830 if (access(full_path, 0) == 0) {
831 execv(full_path, &newargv[1]);
832 if (errno == EACCES) {
833 fprintf(stderr,
834 gettext("%s: Cannot execute %s - permission denied\n"),
835 myname, full_path);
836 }
837 if (errno == ENOEXEC) {
838 newargv[0] = "sh";
839 newargv[1] = full_path;
840 execv("/sbin/sh", &newargv[0]);
841 }
842 }
843 execv(alter_path, &newargv[1]);
844 if (errno == EACCES) {
845 fprintf(stderr, gettext(
846 "%s: Cannot execute %s - permission denied\n"),
847 myname, alter_path);
848 exit(1);
849 }
850 if (errno == ENOEXEC) {
851 newargv[0] = "sh";
852 newargv[1] = alter_path;
853 execv("/sbin/sh", &newargv[0]);
854 }
855 fprintf(stderr,
856 gettext("%s: Operation not applicable to FSType %s\n"),
857 myname, fstype);
858 exit(1);
859 }
860
861 char *mntopts[] = { MNTOPT_IGNORE, NULL };
862 #define IGNORE 0
863
864 /*
865 * Return 1 if "ignore" appears in the options string
866 */
867 int
868 ignore(char *opts)
869 {
870 char *value;
871 char *saveptr, *my_opts;
872 int rval = 0;
873
874 if (opts == NULL || *opts == NULL)
875 return (0);
876
877 /*
878 * we make a copy of the option string to pass to getsubopt(),
879 * because getsubopt() modifies the string. We also save
880 * the original pointer returned by strdup, because getsubopt
881 * changes the pointer passed into it. If strdup fails (unlikely),
882 * we act as if the "ignore" option isn't set rather than fail.
883 */
884
885 if ((saveptr = my_opts = strdup(opts)) == NULL)
886 nomem();
887
888 while (*my_opts != '\0') {
889 if (getsubopt(&my_opts, mntopts, &value) == IGNORE)
890 rval = 1;
891 }
892
893 free(saveptr);
894
895 return (rval);
896 }
897
898 /*
899 * Perform the parallel version of mount. If count == 0, mount all
900 * vfstab filesystems with the automnt field == "yes". Use fstype if
901 * supplied. If mntlist supplied, then attempt to only mount those.
902 */
903
904 int
905 parmount(char **mntlist, int count, char *fstype)
906 {
907 int maxfd = OPEN_MAX;
908 struct rlimit rl;
909 vfsent_t **vl, *vp;
910
911 /*
912 * Process scaling. After running a series
913 * of tests based on the number of simultaneous processes and
914 * processors available, optimum performance was achieved near or
915 * at (PROCN * 2).
916 */
917 if ((maxrun = sysconf(_SC_NPROCESSORS_ONLN)) == -1)
918 maxrun = 4;
919 else
920 maxrun = maxrun * 2 + 1;
921
922 if (getrlimit(RLIMIT_NOFILE, &rl) == 0) {
923 rl.rlim_cur = rl.rlim_max;
924 if (setrlimit(RLIMIT_NOFILE, &rl) == 0)
925 maxfd = (int)rl.rlim_cur;
926 }
927 (void) enable_extended_FILE_stdio(-1, -1);
928
929 /*
930 * The parent needs to maintain 3 of its own fd's, plus 2 for
931 * each child (the stdout and stderr pipes).
932 */
933 maxfd = (maxfd / 2) - 6; /* 6 takes care of temporary */
934 /* periods of open fds */
935 if (maxfd < maxrun)
936 maxrun = maxfd;
937 if (maxrun < 4)
938 maxrun = 4; /* sanity check */
939
940 if (count == 0)
941 mntlist = NULL; /* used as a flag later */
942 else
943 fstype = NULL; /* mount points supplied: */
944 /* ignore fstype */
945 /*
946 * Read the whole vfstab into a linked list for quick processing.
947 * On average, this is the most efficient way to collect and
948 * manipulate the vfstab data.
949 */
950 vfsll = getvfsall(fstype, mntlist == NULL);
951
952 /*
953 * Make an array out of the vfs linked list for sorting purposes.
954 */
955 if (vfsll == NULL ||
956 (vfsarray = make_vfsarray(mntlist, count)) == NULL) {
957 if (mntlist == NULL) /* not an error - just none found */
958 return (0);
959
960 fprintf(stderr, gettext("%s: No valid entries found in %s\n"),
961 myname, vfstab);
962 return (1);
963 }
964
965 /*
966 * Sort the entries based on their resolved path names
967 *
968 * If an lofs is encountered, then the original order of the vfstab
969 * file needs to be maintained until we are done mounting lofs's.
970 */
971 if (!lofscnt)
972 qsort((void *)vfsarray, vfsarraysize, sizeof (vfsent_t *),
973 mlevelcmp);
974
975 /*
976 * Shrink the vfsll linked list down to the new list. This will
977 * speed up the pid search in cleanupkid() later.
978 */
979 vfsll = vfsarray[0];
980 for (vl = vfsarray; vp = *vl; )
981 vp->next = *++vl;
982
983 /*
984 * Try to handle interrupts in a reasonable way.
985 */
986 sigset(SIGHUP, cleanup);
987 sigset(SIGQUIT, cleanup);
988 sigset(SIGINT, cleanup);
989
990 do_mounts(); /* do the mounts */
991
992 if (failcnt > 0 && failcnt == lofsfail)
993 return (ALL_LOFS_FAILURES);
994
995 return (exitcode);
996 }
997
998 /*
999 * Read all vstab (fp) entries into memory if fstype == NULL.
1000 * If fstype is specified, than read all those that match it.
1001 *
1002 * Returns a linked list.
1003 */
1004 vfsent_t *
1005 getvfsall(char *fstype, int takeall)
1006 {
1007 vfsent_t *vhead, *vtail;
1008 struct vfstab vget;
1009 FILE *fp;
1010 int cnt = 0, ret;
1011
1012 if ((fp = fopen(vfstab, "r")) == NULL) {
1013 fprintf(stderr, gettext("%s: Cannot open %s\n"),
1014 myname, vfstab);
1015 exit(1);
1016 }
1017
1018 vhead = vtail = NULL;
1019
1020 while ((ret = getvfsent(fp, &vget)) != -1) {
1021 vfsent_t *vp;
1022
1023 if (ret > 0) {
1024 vfserror(ret, vget.vfs_mountp);
1025 continue;
1026 }
1027
1028 /*
1029 * If mount points were not specified, then we ignore
1030 * entries that aren't marked "yes".
1031 */
1032 if (takeall &&
1033 (vget.vfs_automnt == NULL ||
1034 strcmp(vget.vfs_automnt, "yes")))
1035 continue;
1036
1037 if (fstype && vget.vfs_fstype &&
1038 strcmp(fstype, vget.vfs_fstype))
1039 continue;
1040
1041 if (vget.vfs_mountp == NULL ||
1042 (vget.vfs_fstype && (strcmp(vget.vfs_fstype, "swap") == 0)))
1043 continue;
1044
1045 if (check_fields(vget.vfs_fstype, vget.vfs_mountp)) {
1046 exitcode = 1;
1047 continue;
1048 }
1049
1050 vp = new_vfsent(&vget, cnt); /* create new vfs entry */
1051 if (vhead == NULL)
1052 vhead = vp;
1053 else
1054 vtail->next = vp;
1055 vtail = vp;
1056 cnt++;
1057 }
1058 fclose(fp);
1059 if (vtail == NULL) {
1060 vfsarraysize = 0;
1061 vfslltail = NULL;
1062 return (NULL);
1063 }
1064 vtail->next = NULL;
1065 vfslltail = vtail; /* save it in the global variable */
1066 vfsarraysize = cnt;
1067 return (vhead);
1068 }
1069
1070
1071 /*
1072 * Returns an array of vfsent_t's based on vfsll & mntlist.
1073 */
1074 vfsent_t **
1075 make_vfsarray(char **mntlist, int count)
1076 {
1077 vfsent_t *vp, *vmark, *vpprev, **vpp;
1078 int ndx, found;
1079
1080 if (vfsll == NULL)
1081 return (NULL);
1082
1083 if (count > 0)
1084 vfsarraysize = count;
1085
1086 vpp = (vfsent_t **)malloc(sizeof (*vpp) * (vfsarraysize + 1));
1087 if (vpp == NULL)
1088 nomem();
1089
1090 if (mntlist == NULL) {
1091 /*
1092 * No mount list specified: take all vfstab mount points.
1093 */
1094 for (ndx = 0, vp = vfsll; vp; vp = vp->next) {
1095 (void) setrpath(vp);
1096 /*
1097 * Sigh. lofs entries can complicate matters so much
1098 * that the best way to avoid problems is to
1099 * stop parallel mounting when an lofs is
1100 * encountered, so we keep a count of how many
1101 * there are.
1102 * Fortunately this is rare.
1103 */
1104 if (vp->v.vfs_fstype &&
1105 (strcmp(vp->v.vfs_fstype, MNTTYPE_LOFS) == 0))
1106 lofscnt++;
1107
1108 vpp[ndx++] = vp;
1109 }
1110 vpp[ndx] = NULL;
1111 return (vpp);
1112 }
1113
1114 /*
1115 * A list of mount points was specified on the command line
1116 * and we need to search for each one.
1117 */
1118 vpprev = vfslltail;
1119 vpprev->next = vfsll; /* make a circle out of it */
1120 vmark = vp = vfsll;
1121 /*
1122 * For each specified mount point:
1123 */
1124 for (ndx = 0; *mntlist; mntlist++) {
1125 found = 0;
1126 /*
1127 * Circle our entire linked list, looking for *mntlist.
1128 */
1129 while (vp) {
1130 if (strcmp(*mntlist, vp->v.vfs_mountp) == 0) {
1131 vpp[ndx++] = vp; /* found it. */
1132 (void) setrpath(vp);
1133 if (vp->v.vfs_fstype &&
1134 (strcmp(vp->v.vfs_fstype,
1135 MNTTYPE_LOFS) == 0))
1136 lofscnt++;
1137
1138 if (vp == vpprev) { /* list exhausted */
1139 vp = NULL;
1140 found++;
1141 break;
1142 }
1143 /*
1144 * Remove it from the circular list. vpprev
1145 * remains unchanged.
1146 */
1147 vp = vp->next;
1148 vpprev->next->next = NULL;
1149 vpprev->next = vp;
1150 /*
1151 * Set vmark to the first elem that we check
1152 * each time.
1153 */
1154 vmark = vp;
1155 found++;
1156 break;
1157 }
1158 vpprev = vp;
1159 vp = vp->next;
1160 if (vp == vmark) /* break out if we completed */
1161 /* the circle */
1162 break;
1163 }
1164
1165 if (!found) {
1166 fprintf(stderr, gettext(
1167 "%s: Warning: %s not found in %s\n"),
1168 myname, *mntlist, vfstab);
1169 exitcode = 1;
1170 }
1171 }
1172 if (ndx == 0)
1173 return (NULL);
1174
1175 vpp[ndx] = NULL; /* null terminate the list */
1176 vfsarraysize = ndx; /* adjust vfsarraysize */
1177 return (vpp);
1178 }
1179
1180 /*
1181 * Performs the exec argument processing, all of the child forking and
1182 * execing, and child cleanup.
1183 * Sets exitcode to non-zero if any errors occurred.
1184 */
1185 void
1186 do_mounts(void)
1187 {
1188 int i, isave, cnt;
1189 vfsent_t *vp, *vpprev, **vl;
1190 char *newargv[ARGV_MAX];
1191 pid_t child;
1192
1193 /*
1194 * create the arg list once; the only differences among
1195 * the calls are the options, special and mountp fields.
1196 */
1197 i = 2;
1198 if (cflg)
1199 newargv[i++] = "-c";
1200 if (gflg)
1201 newargv[i++] = "-g";
1202 if (mflg)
1203 newargv[i++] = "-m";
1204 if (Oflg)
1205 newargv[i++] = "-O";
1206 if (qflg)
1207 newargv[i++] = "-q";
1208 if (rflg)
1209 newargv[i++] = "-r";
1210 if (dashflg)
1211 newargv[i++] = "--";
1212 if (oflg) {
1213 newargv[i++] = "-o";
1214 newargv[i++] = specific_opts;
1215 }
1216 isave = i;
1217
1218 /*
1219 * Main loop for the mount processes
1220 */
1221 vl = vfsarray;
1222 cnt = vfsarraysize;
1223 for (vpprev = *vl; vp = *vl; vpprev = vp, vl++, cnt--) {
1224 /*
1225 * Check to see if we cross a mount level: e.g.,
1226 * /a/b -> /a/b/c. If so, we need to wait for all current
1227 * mounts to finish, rerun realpath on the remaining mount
1228 * points, and resort the list.
1229 *
1230 * Also, we mount serially as long as there are lofs's
1231 * to mount to avoid improper mount ordering.
1232 */
1233 if (vp->mlevel > vpprev->mlevel || lofscnt > 0) {
1234 vfsent_t **vlp;
1235
1236 while (nrun > 0 && (dowait() != -1))
1237 ;
1238 /*
1239 * Gads! It's possible for real path mounts points to
1240 * change after mounts are done at a lower mount
1241 * level.
1242 * Thus, we need to recalculate mount levels and
1243 * resort the list from this point.
1244 */
1245 for (vlp = vl; *vlp; vlp++)
1246 (void) setrpath(*vlp);
1247 /*
1248 * Sort the remaining entries based on their newly
1249 * resolved path names.
1250 * Do not sort if we still have lofs's to mount.
1251 */
1252 if (lofscnt == 0) {
1253 qsort((void *)vl, cnt, sizeof (vfsent_t *),
1254 mlevelcmp);
1255 vp = *vl;
1256 }
1257 }
1258
1259 if (vp->flag & VRPFAILED) {
1260 fprintf(stderr, gettext(
1261 "%s: Nonexistent mount point: %s\n"),
1262 myname, vp->v.vfs_mountp);
1263 vp->flag |= VNOTMOUNTED;
1264 exitcode = 1;
1265 continue;
1266 }
1267
1268 /*
1269 * If mount options were not specified on the command
1270 * line, then use the ones found in the vfstab entry,
1271 * if any.
1272 */
1273 i = isave;
1274 if (!oflg && vp->v.vfs_mntopts) {
1275 newargv[i++] = "-o";
1276 newargv[i++] = vp->v.vfs_mntopts;
1277 }
1278 newargv[i++] = vp->v.vfs_special;
1279 newargv[i++] = vp->rpath;
1280 newargv[i] = NULL;
1281
1282 /*
1283 * This should never really fail.
1284 */
1285 while (setup_iopipe(vp) == -1 && (dowait() != -1))
1286 ;
1287
1288 while (nrun >= maxrun && (dowait() != -1)) /* throttle */
1289 ;
1290
1291 if ((child = fork()) == -1) {
1292 perror("fork");
1293 cleanup(-1);
1294 /* not reached */
1295 }
1296 if (child == 0) { /* child */
1297 signal(SIGHUP, SIG_IGN);
1298 signal(SIGQUIT, SIG_IGN);
1299 signal(SIGINT, SIG_IGN);
1300 setup_output(vp);
1301 doexec(vp->v.vfs_fstype, newargv);
1302 perror("exec");
1303 exit(1);
1304 }
1305
1306 /* parent */
1307 (void) close(vp->sopipe[WRPIPE]);
1308 (void) close(vp->sepipe[WRPIPE]);
1309 vp->pid = child;
1310 nrun++;
1311 }
1312 /*
1313 * Mostly done by now - wait and clean up the stragglers.
1314 */
1315 cleanup(0);
1316 }
1317
1318
1319 /*
1320 * Setup stdout and stderr pipes for the children's output.
1321 */
1322 int
1323 setup_iopipe(vfsent_t *mp)
1324 {
1325 /*
1326 * Make a stdout and stderr pipe. This should never fail.
1327 */
1328 if (pipe(mp->sopipe) == -1)
1329 return (-1);
1330 if (pipe(mp->sepipe) == -1) {
1331 (void) close(mp->sopipe[RDPIPE]);
1332 (void) close(mp->sopipe[WRPIPE]);
1333 return (-1);
1334 }
1335 /*
1336 * Don't block on an empty pipe.
1337 */
1338 (void) fcntl(mp->sopipe[RDPIPE], F_SETFL, O_NDELAY|O_NONBLOCK);
1339 (void) fcntl(mp->sepipe[RDPIPE], F_SETFL, O_NDELAY|O_NONBLOCK);
1340 /*
1341 * Don't pass extra fds into children.
1342 */
1343 (void) fcntl(mp->sopipe[RDPIPE], F_SETFD, FD_CLOEXEC);
1344 (void) fcntl(mp->sepipe[RDPIPE], F_SETFD, FD_CLOEXEC);
1345
1346 return (0);
1347 }
1348
1349 /*
1350 * Called by a child to attach its stdout and stderr to the write side of
1351 * the pipes.
1352 */
1353 void
1354 setup_output(vfsent_t *vp)
1355 {
1356
1357 (void) close(fileno(stdout));
1358 (void) dup(vp->sopipe[WRPIPE]);
1359 (void) close(vp->sopipe[WRPIPE]);
1360
1361 (void) close(fileno(stderr));
1362 (void) dup(vp->sepipe[WRPIPE]);
1363 (void) close(vp->sepipe[WRPIPE]);
1364 }
1365
1366 /*
1367 * Parent uses this to print any stdout or stderr output issued by
1368 * the child.
1369 */
1370 static void
1371 doio(vfsent_t *vp)
1372 {
1373 int bytes;
1374 char ibuf[BUFSIZ];
1375
1376 while ((bytes = read(vp->sepipe[RDPIPE], ibuf, sizeof (ibuf))) > 0)
1377 write(fileno(stderr), ibuf, bytes);
1378 while ((bytes = read(vp->sopipe[RDPIPE], ibuf, sizeof (ibuf))) > 0)
1379 write(fileno(stdout), ibuf, bytes);
1380
1381 (void) close(vp->sopipe[RDPIPE]);
1382 (void) close(vp->sepipe[RDPIPE]);
1383 }
1384
1385 /*
1386 * Waits for 1 child to die.
1387 *
1388 * Returns -1 if no children are left to wait for.
1389 * Returns 0 if a child died without an error.
1390 * Returns 1 if a child died with an error.
1391 */
1392 int
1393 dowait(void)
1394 {
1395 int child, wstat;
1396
1397 if ((child = wait(&wstat)) == -1)
1398 return (-1);
1399 nrun--;
1400 return (cleanupkid(child, wstat) != 0);
1401 }
1402
1403 /*
1404 * Locates the child mount process represented by pid, outputs any io
1405 * it may have, and returns its exit code.
1406 * Sets the global exitcode if an error occurred.
1407 */
1408 int
1409 cleanupkid(pid_t pid, int wstat)
1410 {
1411 vfsent_t *vp, *prevp;
1412 int ret;
1413
1414 if (WIFEXITED(wstat)) /* this should always be true */
1415 ret = WEXITSTATUS(wstat);
1416 else
1417 ret = 1; /* assume some kind of error */
1418 if (ret) {
1419 exitcode = 1;
1420 failcnt++;
1421 }
1422
1423 /*
1424 * Find our child.
1425 * This search gets smaller and smaller as children are cleaned
1426 * up.
1427 */
1428 for (prevp = NULL, vp = vfsll; vp; vp = vp->next) {
1429 if (vp->pid != pid) {
1430 prevp = vp;
1431 continue;
1432 }
1433 /*
1434 * Found: let's remove it from this linked list.
1435 */
1436 if (prevp) {
1437 prevp->next = vp->next;
1438 vp->next = NULL;
1439 }
1440 break;
1441 }
1442
1443 if (vp == NULL) {
1444 /*
1445 * This should never happen.
1446 */
1447 fprintf(stderr, gettext(
1448 "%s: Unknown child %d\n"), myname, pid);
1449 exitcode = 1;
1450 return (ret);
1451 }
1452 doio(vp); /* Any output? */
1453
1454 if (vp->v.vfs_fstype &&
1455 (strcmp(vp->v.vfs_fstype, MNTTYPE_LOFS) == 0)) {
1456 lofscnt--;
1457 if (ret)
1458 lofsfail++;
1459 }
1460
1461 vp->exitcode = ret;
1462 return (ret);
1463 }
1464
1465
1466 static vfsent_t zvmount = { 0 };
1467
1468 vfsent_t *
1469 new_vfsent(struct vfstab *vin, int order)
1470 {
1471 vfsent_t *new;
1472
1473 new = (vfsent_t *)malloc(sizeof (*new));
1474 if (new == NULL)
1475 nomem();
1476
1477 *new = zvmount;
1478 if (vin->vfs_special &&
1479 (new->v.vfs_special = strdup(vin->vfs_special)) == NULL)
1480 nomem();
1481 if (vin->vfs_mountp &&
1482 (new->v.vfs_mountp = strdup(vin->vfs_mountp)) == NULL)
1483 nomem();
1484 if (vin->vfs_fstype &&
1485 (new->v.vfs_fstype = strdup(vin->vfs_fstype)) == NULL)
1486 nomem();
1487 /*
1488 * If specific mount options were specified on the command
1489 * line, then use those. Else, use the ones on the vfstab
1490 * line, if any. In other words, specific options on the
1491 * command line override those in /etc/vfstab.
1492 */
1493 if (oflg) {
1494 if ((new->v.vfs_mntopts = strdup(specific_opts)) == NULL)
1495 nomem();
1496 } else if (vin->vfs_mntopts &&
1497 (new->v.vfs_mntopts = strdup(vin->vfs_mntopts)) == NULL)
1498 nomem();
1499
1500 new->order = order;
1501 return (new);
1502 }
1503
1504 /*
1505 * Runs realpath on vp's mount point, records success or failure,
1506 * resets the mount level based on the new realpath, and returns
1507 * realpath()'s return value.
1508 */
1509 char *
1510 setrpath(vfsent_t *vp)
1511 {
1512 char *rp;
1513
1514 if ((rp = realpath(vp->v.vfs_mountp, realdir)) == NULL)
1515 vp->flag |= VRPFAILED;
1516 else
1517 vp->flag &= ~VRPFAILED;
1518
1519 if (vp->rpath)
1520 free(vp->rpath);
1521 if ((vp->rpath = strdup(realdir)) == NULL)
1522 nomem();
1523 vp->mlevel = fsgetmlevel(vp->rpath);
1524 return (rp);
1525 }
1526
1527
1528 /*
1529 * sort first by mlevel (1...N), then by vfstab order.
1530 */
1531 int
1532 mlevelcmp(const void *a, const void *b)
1533 {
1534 vfsent_t *a1, *b1;
1535 int lcmp;
1536
1537 a1 = *(vfsent_t **)a;
1538 b1 = *(vfsent_t **)b;
1539
1540 lcmp = a1->mlevel - b1->mlevel;
1541 if (lcmp == 0)
1542 lcmp = a1->order - b1->order;
1543 return (lcmp);
1544 }
1545
1546 /* sort by vfstab order. 0..N */
1547 static int
1548 mordercmp(const void *a, const void *b)
1549 {
1550 vfsent_t *a1, *b1;
1551
1552 a1 = *(vfsent_t **)a;
1553 b1 = *(vfsent_t **)b;
1554 return (a1->order - b1->order);
1555 }
1556
1557 /*
1558 * cleanup the existing children and exit with an error
1559 * if asig != 0.
1560 */
1561 void
1562 cleanup(int asig)
1563 {
1564 while (nrun > 0 && (dowait() != -1))
1565 ;
1566
1567 if (asig != 0)
1568 exit(1);
1569 }
1570
1571
1572 int
1573 check_fields(char *fstype, char *mountp)
1574 {
1575 struct stat64 stbuf;
1576
1577 if (fstype == NULL) {
1578 fprintf(stderr,
1579 gettext("%s: FSType cannot be determined\n"),
1580 myname);
1581 return (1);
1582 }
1583 if (strlen(fstype) > (size_t)FSTYPE_MAX) {
1584 fprintf(stderr,
1585 gettext("%s: FSType %s exceeds %d characters\n"),
1586 myname, fstype, FSTYPE_MAX);
1587 return (1);
1588 }
1589
1590 if (mountp == NULL) {
1591 fprintf(stderr,
1592 gettext("%s: Mount point cannot be determined\n"),
1593 myname);
1594 return (1);
1595 }
1596 if (*mountp != '/') {
1597 fprintf(stderr, gettext(
1598 "%s: Mount point %s is not an absolute pathname.\n"),
1599 myname, mountp);
1600 return (1);
1601 }
1602 /*
1603 * Don't do some of these checks if aflg because a mount point may
1604 * not exist now, but will be mounted before we get to it.
1605 * This is one of the quirks of "secondary mounting".
1606 */
1607 if (!aflg && stat64(mountp, &stbuf) < 0) {
1608 if (errno == ENOENT || errno == ENOTDIR)
1609 fprintf(stderr,
1610 gettext("%s: Mount point %s does not exist.\n"),
1611 myname, mountp);
1612 else {
1613 fprintf(stderr,
1614 gettext("%s: Cannot stat mount point %s.\n"),
1615 myname, mountp);
1616 perror(myname);
1617 }
1618 return (1);
1619 }
1620 return (0);
1621 }
1622
1623 void
1624 nomem(void)
1625 {
1626 fprintf(stderr, gettext("%s: Out of memory\n"), myname);
1627 while (nrun > 0 && (dowait() != -1))
1628 ;
1629 exit(1);
1630 }