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 * Copyright 2016 Joyent, Inc.
25 */
26
27 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
28 /* All Rights Reserved */
29
30
31 /*
32 * Copyright 2010 Sun Microsystems, Inc. All rights reserved.
33 * Use is subject to license terms.
34 */
35
36 #include <stdio.h>
37 #include <stdio_ext.h>
38 #include <limits.h>
39 #include <fcntl.h>
40 #include <unistd.h>
41 #include <stdlib.h>
42 #include <string.h>
43 #include <stdarg.h>
44 #include <sys/types.h>
45 #include <sys/stat.h>
46 #include <sys/statvfs.h>
47 #include <errno.h>
48 #include <sys/mnttab.h>
49 #include <sys/mntent.h>
50 #include <sys/mount.h>
51 #include <sys/vfstab.h>
52 #include <sys/param.h>
53 #include <sys/wait.h>
54 #include <sys/signal.h>
55 #include <sys/resource.h>
56 #include <stropts.h>
57 #include <sys/conf.h>
58 #include <locale.h>
59 #include <zone.h>
60 #include "fslib.h"
61
62 #define VFS_PATH "/usr/lib/fs"
63 #define ALT_PATH "/etc/fs"
64 #define REMOTE "/etc/dfs/fstypes"
65
66 #define ARGV_MAX 16
67 #define TIME_MAX 50
68 #define FSTYPE_MAX 8
69 #define REMOTE_MAX 64
70
71 #define OLD 0
72 #define NEW 1
73
74 #define READONLY 0
75 #define READWRITE 1
76 #define SUID 2
77 #define NOSUID 3
78 #define SETUID 4
79 #define NOSETUID 5
80 #define DEVICES 6
81 #define NODEVICES 7
82
83 #define FORMAT "%a %b %e %H:%M:%S %Y\n" /* date time format */
84 /* a - abbreviated weekday name */
85 /* b - abbreviated month name */
86 /* e - day of month */
87 /* H - hour */
88 /* M - minute */
89 /* S - second */
90 /* Y - Year */
91 /* n - newline */
92
93 /*
94 * The fs-local method understands this exit code to mean that one or
95 * more failures occurred and that all the failures were of attempted
96 * lofs mounts.
97 */
98 #define ALL_LOFS_FAILURES 111
99
100 extern int optind;
101 extern char *optarg;
102
103 extern void usage(void);
104 extern char *flags(char *, int);
105 extern char *remote(char *, FILE *);
106 extern char *default_fstype(char *);
107
108 char *myopts[] = {
109 MNTOPT_RO,
110 MNTOPT_RW,
111 MNTOPT_SUID,
112 MNTOPT_NOSUID,
113 MNTOPT_SETUID,
114 MNTOPT_NOSETUID,
115 MNTOPT_DEVICES,
116 MNTOPT_NODEVICES,
117 NULL
118 };
119
120 static char *myname; /* point to argv[0] */
121
122 /*
123 * Set the limit to double the number of characters a user should be allowed to
124 * type in one line.
125 * This should cover the different shells, which don't use POSIX_MAX_INPUT,
126 * and should cover the case where a long option string can be in
127 * the /etc/vfstab file.
128 */
129 char mntflags[(_POSIX_MAX_INPUT+1) * 2];
130
131 char realdir[MAXPATHLEN]; /* buffer for realpath() calls */
132 char *vfstab = VFSTAB;
133 char *mnttab = MNTTAB;
134 char *specific_opts; /* holds specific mount options */
135 char *generic_opts; /* holds generic mount options */
136 int maxrun;
137 int nrun;
138 int failcnt; /* total count of failures */
139 int lofscnt; /* presence of lofs prohibits parallel */
140 /* mounting */
141 int lofsfail; /* count of failures of lofs mounts */
142 int exitcode;
143 int aflg, cflg, fflg, Fflg, gflg, oflg, pflg, rflg, vflg, Vflg, mflg, Oflg,
144 dashflg, questflg, dflg, qflg;
145
146
147 /*
148 * Each vfsent_t describes a vfstab entry. It is used to manage and cleanup
149 * each child that performs the particular mount for the entry.
150 */
151
152 typedef struct vfsent {
153 struct vfstab v; /* the vfstab entry */
154 char *rpath; /* resolved pathname so far */
155 int mlevel; /* how deep is this mount point */
156 int order; /* vfstab serial order of this vfs */
157 int flag;
158 pid_t pid; /* the pid of this mount process */
159 int exitcode; /* process's exitcode */
160 #define RDPIPE 0
161 #define WRPIPE 1
162 int sopipe[2]; /* pipe attached to child's stdout */
163 int sepipe[2]; /* pipe attached to child's stderr */
164 struct vfsent *next; /* used when in linked list */
165 } vfsent_t;
166
167 #define VRPFAILED 0x01 /* most recent realpath failed on */
168 /* this mount point */
169 #define VNOTMOUNTED 0x02 /* mount point could not be mounted */
170
171 vfsent_t *vfsll, *vfslltail; /* head and tail of the global */
172 /* linked list of vfstab entries */
173 vfsent_t **vfsarray; /* global array of vfsent_t's */
174 int vfsarraysize; /* length of the list */
175
176 /*
177 * This structure is used to build a linked list of
178 * mnttab structures from /etc/mnttab.
179 */
180 typedef struct mountent {
181 struct extmnttab *ment;
182 int flag;
183 struct mountent *next;
184 } mountent_t;
185
186 #define MSORTED 0x1
187
188 static vfsent_t **make_vfsarray(char **, int);
189 static vfsent_t *new_vfsent(struct vfstab *, int);
190 static vfsent_t *getvfsall(char *, int);
191
192 static void doexec(char *, char **);
193 static void nomem();
194 static void cleanup(int);
195 static char *setrpath(vfsent_t *);
196 static int dowait();
197 static int setup_iopipe(vfsent_t *);
198 static void setup_output(vfsent_t *);
199 static void doio(vfsent_t *);
200 static void do_mounts();
201 static int parmount(char **, int, char *);
202 static int mlevelcmp(const void *, const void *);
203 static int mordercmp(const void *, const void *);
204 static int check_fields(char *, char *);
205 static int cleanupkid(pid_t, int);
206 static void print_mnttab(int, int);
207 static void vfserror(int, char *);
208 static void mnterror(int);
209 static int ignore(char *);
210
211 /*
212 * This is /usr/sbin/mount: the generic command that in turn
213 * execs the appropriate /usr/lib/fs/{fstype}/mount.
214 * The -F flag and argument are NOT passed.
215 * If the usr file system is not mounted a duplicate copy
216 * can be found in /sbin and this version execs the
217 * appropriate /etc/fs/{fstype}/mount
218 *
219 * If the -F fstype, special or directory are missing,
220 * /etc/vfstab is searched to fill in the missing arguments.
221 *
222 * -V will print the built command on the stdout.
223 * It isn't passed either.
224 */
225 int
226 main(int argc, char *argv[])
227 {
228 char *special, /* argument of special/resource */
229 *mountp, /* argument of mount directory */
230 *fstype, /* wherein the fstype name is filled */
231 *newargv[ARGV_MAX], /* arg list for specific command */
232 *farg = NULL, *Farg = NULL;
233 int ii, ret, cc, fscnt;
234 struct stat64 stbuf;
235 struct vfstab vget, vref;
236 mode_t mode;
237 FILE *fd;
238
239 (void) setlocale(LC_ALL, "");
240
241 #if !defined(TEXT_DOMAIN)
242 #define TEXT_DOMAIN "SYS_TEST"
243 #endif
244 (void) textdomain(TEXT_DOMAIN);
245
246 myname = strrchr(argv[0], '/');
247 if (myname)
248 myname++;
249 else
250 myname = argv[0];
251 if (myname == 0) myname = "path unknown";
252
253 /* Process the args. */
254
255 while ((cc = getopt(argc, argv, "?acd:f:F:gmno:pqrvVO")) != -1)
256 switch (cc) {
257 case 'a':
258 aflg++;
259 break;
260 case 'c':
261 cflg++;
262 break;
263
264 #ifdef DEBUG
265 case 'd':
266 dflg = atoi(optarg);
267 break;
268 #endif
269
270 case 'f':
271 fflg++;
272 farg = optarg;
273 break;
274 case 'F':
275 Fflg++;
276 Farg = optarg;
277 break;
278 case 'g':
279 gflg++;
280 break;
281 case 'm':
282 mflg++;
283 break; /* do not update /etc/mnttab */
284 case 'o':
285 oflg++;
286 if ((specific_opts = strdup(optarg)) == NULL)
287 nomem();
288 break; /* fstype dependent options */
289 case 'O':
290 Oflg++;
291 break;
292 case 'p':
293 pflg++;
294 break;
295 case 'q':
296 qflg++;
297 break;
298 case 'r':
299 rflg++;
300 generic_opts = "ro";
301 break;
302 case 'v':
303 vflg++;
304 break;
305 case 'V':
306 Vflg++;
307 break;
308 case '?':
309 questflg++;
310 break;
311 }
312
313 /* copy '--' to specific */
314 if (strcmp(argv[optind-1], "--") == 0)
315 dashflg++;
316
317 /* option checking */
318 /* more than two args not allowed if !aflg */
319 if (!aflg && (argc - optind > 2))
320 usage();
321
322 /* pv mututally exclusive */
323 if (pflg + vflg + aflg > 1) {
324 fprintf(stderr, gettext
325 ("%s: -a, -p, and -v are mutually exclusive\n"),
326 myname);
327 usage();
328 }
329
330 /*
331 * Can't have overlaying mounts on the same mount point during
332 * a parallel mount.
333 */
334 if (aflg && Oflg) {
335 fprintf(stderr, gettext
336 ("%s: -a and -O are mutually exclusive\n"), myname);
337 usage();
338 }
339
340 /* dfF mutually exclusive */
341 if (fflg + Fflg > 1) {
342 fprintf(stderr, gettext
343 ("%s: More than one FSType specified\n"), myname);
344 usage();
345 }
346
347 /* no arguments, only allow p,v,V or [F]? */
348 if (!aflg && optind == argc) {
349 if (cflg || fflg || mflg || oflg || rflg || qflg)
350 usage();
351
352 if (Fflg && !questflg)
353 usage();
354
355 if (questflg) {
356 if (Fflg) {
357 newargv[2] = "-?";
358 newargv[3] = NULL;
359 doexec(Farg, newargv);
360 }
361 usage();
362 }
363 }
364
365 if (questflg)
366 usage();
367
368 /* one or two args, allow any but p,v */
369 if (optind != argc && (pflg || vflg)) {
370 fprintf(stderr,
371 gettext("%s: Cannot use -p and -v with arguments\n"), myname);
372 usage();
373 }
374
375
376 /* if only reporting mnttab, generic prints mnttab and exits */
377 if (!aflg && optind == argc) {
378 if (Vflg) {
379 printf("%s", myname);
380 if (pflg)
381 printf(" -p");
382 if (vflg)
383 printf(" -v");
384 printf("\n");
385 exit(0);
386 }
387
388 print_mnttab(vflg, pflg);
389 exit(0);
390 }
391
392 /*
393 * Get filesystem type here. If "-F FStype" is specified, use
394 * that fs type. Otherwise, determine the fs type from /etc/vfstab
395 * if the entry exists. Otherwise, determine the local or remote
396 * fs type from /etc/default/df or /etc/dfs/fstypes respectively.
397 */
398 if (fflg) {
399 if ((strcmp(farg, "S51K") != 0) &&
400 (strcmp(farg, "S52K") != 0)) {
401 fstype = farg;
402 }
403 else
404 fstype = "ufs";
405 } else /* if (Fflg) */
406 fstype = Farg;
407
408 fscnt = argc - optind;
409 if (aflg && (fscnt != 1))
410 exit(parmount(argv + optind, fscnt, fstype));
411
412 /*
413 * Then don't bother with the parallel over head. Everything
414 * from this point is simple/normal single execution.
415 */
416 aflg = 0;
417
418 /* get special and/or mount-point from arg(s) */
419 if (fscnt == 2)
420 special = argv[optind++];
421 else
422 special = NULL;
423 if (optind < argc)
424 mountp = argv[optind++];
425 else
426 mountp = NULL;
427
428 /* lookup only if we need to */
429 if (fstype == NULL || specific_opts == NULL || special == NULL ||
430 mountp == NULL) {
431 if ((fd = fopen(vfstab, "r")) == NULL) {
432 if (fstype == NULL || special == NULL ||
433 mountp == NULL) {
434 fprintf(stderr, gettext(
435 "%s: Cannot open %s\n"),
436 myname, vfstab);
437 exit(1);
438 } else {
439 /*
440 * No vfstab, but we know what we want
441 * to mount.
442 */
443 goto out;
444 }
445 }
446 vfsnull(&vref);
447 vref.vfs_special = special;
448 vref.vfs_mountp = mountp;
449 vref.vfs_fstype = fstype;
450
451 /* get a vfstab entry matching mountp or special */
452 while ((ret = getvfsany(fd, &vget, &vref)) > 0)
453 vfserror(ret, vget.vfs_special);
454
455 /* if no entry and there was only one argument */
456 /* then the argument could be the special */
457 /* and not mount point as we thought earlier */
458 if (ret == -1 && special == NULL) {
459 rewind(fd);
460 special = vref.vfs_special = mountp;
461 mountp = vref.vfs_mountp = NULL;
462 /* skip erroneous lines; they were reported above */
463 while ((ret = getvfsany(fd, &vget, &vref)) > 0)
464 ;
465 }
466
467 fclose(fd);
468
469 if (ret == 0) {
470 if (fstype == NULL)
471 fstype = vget.vfs_fstype;
472 if (special == NULL)
473 special = vget.vfs_special;
474 if (mountp == NULL)
475 mountp = vget.vfs_mountp;
476 if (oflg == 0 && vget.vfs_mntopts) {
477 oflg++;
478 specific_opts = vget.vfs_mntopts;
479 }
480 } else if (special == NULL) {
481 if (stat64(mountp, &stbuf) == -1) {
482 fprintf(stderr, gettext("%s: cannot stat %s\n"),
483 myname, mountp);
484 exit(2);
485 }
486 if (((mode = (stbuf.st_mode & S_IFMT)) == S_IFBLK) ||
487 (mode == S_IFCHR)) {
488 fprintf(stderr,
489 gettext("%s: mount point cannot be determined\n"),
490 myname);
491 exit(1);
492 } else
493 {
494 fprintf(stderr,
495 gettext("%s: special cannot be determined\n"),
496 myname);
497 exit(1);
498 }
499 } else if (fstype == NULL)
500 fstype = default_fstype(special);
501 }
502
503 out:
504 if (realpath(mountp, realdir) == NULL) {
505 (void) fprintf(stderr, "mount: ");
506 perror(mountp);
507 exit(1);
508 }
509
510 if ((mountp = strdup(realdir)) == NULL)
511 nomem();
512
513 if (check_fields(fstype, mountp))
514 exit(1);
515
516 /* create the new arg list, and end the list with a null pointer */
517 ii = 2;
518 if (cflg)
519 newargv[ii++] = "-c";
520 if (gflg)
521 newargv[ii++] = "-g";
522 if (mflg)
523 newargv[ii++] = "-m";
524 /*
525 * The q option needs to go before the -o option as some
526 * filesystems complain during first pass option parsing.
527 */
528 if (qflg)
529 newargv[ii++] = "-q";
530 if (oflg) {
531 newargv[ii++] = "-o";
532 newargv[ii++] = specific_opts;
533 }
534 if (Oflg)
535 newargv[ii++] = "-O";
536 if (rflg)
537 newargv[ii++] = "-r";
538 if (dashflg)
539 newargv[ii++] = "--";
540 newargv[ii++] = special;
541 newargv[ii++] = mountp;
542 newargv[ii] = NULL;
543
544 doexec(fstype, newargv);
545 return (0);
546 }
547
548 void
549 usage(void)
550 {
551 fprintf(stderr, gettext("Usage:\n%s [-v | -p]\n"), myname);
552 fprintf(stderr, gettext(
553 "%s [-F FSType] [-V] [current_options] [-o specific_options]"),
554 myname);
555 fprintf(stderr, gettext("\n\t{special | mount_point}\n"));
556
557 fprintf(stderr, gettext(
558 "%s [-F FSType] [-V] [current_options] [-o specific_options]"),
559 myname);
560 fprintf(stderr, gettext("\n\tspecial mount_point\n"));
561
562 fprintf(stderr, gettext(
563 "%s -a [-F FSType ] [-V] [current_options] [-o specific_options]\n"),
564 myname);
565 fprintf(stderr, gettext("\t[mount_point ...]\n"));
566
567 exit(1);
568 }
569
570 /*
571 * Get rid of "dev=[hex string]" clause, if any. It's not legal
572 * when printing in vfstab format.
573 */
574 void
575 elide_dev(char *mntopts)
576 {
577 char *dev, *other;
578
579 if (mntopts != NULL) {
580 dev = strstr(mntopts, "dev=");
581 if (dev != NULL) {
582 other = strpbrk(dev, ",");
583 if (other == NULL) {
584 /* last option */
585 if (dev != mntopts) {
586 *--dev = '\0';
587 } else {
588 *dev = '\0';
589 }
590 } else {
591 /* first or intermediate option */
592 memmove(dev, other+1, strlen(other+1)+1);
593 }
594 }
595 }
596 }
597
598 void
599 print_mnttab(int vflg, int pflg)
600 {
601 FILE *fd;
602 FILE *rfp; /* this will be NULL if fopen fails */
603 int ret;
604 char time_buf[TIME_MAX]; /* array to hold date and time */
605 struct extmnttab mget;
606 time_t ltime;
607
608 if ((fd = fopen(mnttab, "r")) == NULL) {
609 fprintf(stderr, gettext("%s: Cannot open mnttab\n"), myname);
610 exit(1);
611 }
612 rfp = fopen(REMOTE, "r");
613 while ((ret = getextmntent(fd, &mget, sizeof (struct extmnttab)))
614 == 0) {
615 if (ignore(mget.mnt_mntopts))
616 continue;
617 if (mget.mnt_special && mget.mnt_mountp &&
618 mget.mnt_fstype && mget.mnt_time) {
619 ltime = atol(mget.mnt_time);
620 cftime(time_buf, FORMAT, <ime);
621 if (pflg) {
622 elide_dev(mget.mnt_mntopts);
623 printf("%s - %s %s - no %s\n",
624 mget.mnt_special,
625 mget.mnt_mountp,
626 mget.mnt_fstype,
627 mget.mnt_mntopts != NULL ?
628 mget.mnt_mntopts : "-");
629 } else if (vflg) {
630 printf("%s on %s type %s %s%s on %s",
631 mget.mnt_special,
632 mget.mnt_mountp,
633 mget.mnt_fstype,
634 remote(mget.mnt_fstype, rfp),
635 flags(mget.mnt_mntopts, NEW),
636 time_buf);
637 } else
638 printf("%s on %s %s%s on %s",
639 mget.mnt_mountp,
640 mget.mnt_special,
641 remote(mget.mnt_fstype, rfp),
642 flags(mget.mnt_mntopts, OLD),
643 time_buf);
644 }
645 }
646 if (ret > 0)
647 mnterror(ret);
648 }
649
650 char *
651 flags(char *mntopts, int flag)
652 {
653 char opts[sizeof (mntflags)];
654 char *value;
655 int rdwr = 1;
656 int suid = 1;
657 int devices = 1;
658 int setuid = 1;
659
660 if (mntopts == NULL || *mntopts == '\0')
661 return ("read/write/setuid/devices");
662
663 strcpy(opts, "");
664 while (*mntopts != '\0') {
665 switch (getsubopt(&mntopts, myopts, &value)) {
666 case READONLY:
667 rdwr = 0;
668 break;
669 case READWRITE:
670 rdwr = 1;
671 break;
672 case SUID:
673 suid = 1;
674 break;
675 case NOSUID:
676 suid = 0;
677 break;
678 case SETUID:
679 setuid = 1;
680 break;
681 case NOSETUID:
682 setuid = 0;
683 break;
684 case DEVICES:
685 devices = 1;
686 break;
687 case NODEVICES:
688 devices = 0;
689 break;
690 default:
691 /* cat '/' separator to mntflags */
692 if (*opts != '\0' && value != NULL)
693 strcat(opts, "/");
694 strcat(opts, value);
695 break;
696 }
697 }
698
699 strcpy(mntflags, "");
700 if (rdwr)
701 strcat(mntflags, "read/write");
702 else if (flag == OLD)
703 strcat(mntflags, "read only");
704 else
705 strcat(mntflags, "read-only");
706 if (suid) {
707 if (setuid)
708 strcat(mntflags, "/setuid");
709 else
710 strcat(mntflags, "/nosetuid");
711 if (devices)
712 strcat(mntflags, "/devices");
713 else
714 strcat(mntflags, "/nodevices");
715 } else {
716 strcat(mntflags, "/nosetuid/nodevices");
717 }
718 if (*opts != '\0') {
719 strcat(mntflags, "/");
720 strcat(mntflags, opts);
721 }
722
723 /*
724 * The assumed assertion
725 * assert (strlen(mntflags) < sizeof mntflags);
726 * is valid at this point in the code. Note that a call to "assert"
727 * is not appropriate in production code since it halts the program.
728 */
729 return (mntflags);
730 }
731
732 char *
733 remote(char *fstype, FILE *rfp)
734 {
735 char buf[BUFSIZ];
736 char *fs;
737 extern char *strtok();
738
739 if (rfp == NULL || fstype == NULL ||
740 strlen(fstype) > (size_t)FSTYPE_MAX)
741 return (""); /* not a remote */
742 rewind(rfp);
743 while (fgets(buf, sizeof (buf), rfp) != NULL) {
744 fs = strtok(buf, " \t\n");
745 if (strcmp(fstype, fs) == 0)
746 return ("remote/"); /* is a remote fs */
747 }
748 return (""); /* not a remote */
749 }
750
751
752 void
753 vfserror(int flag, char *special)
754 {
755 if (special == NULL)
756 special = "<null>";
757 switch (flag) {
758 case VFS_TOOLONG:
759 fprintf(stderr,
760 gettext("%s: Warning: Line in vfstab for \"%s\" exceeds %d characters\n"),
761 myname, special, VFS_LINE_MAX-1);
762 break;
763 case VFS_TOOFEW:
764 fprintf(stderr,
765 gettext("%s: Warning: Line for \"%s\" in vfstab has too few entries\n"),
766 myname, special);
767 break;
768 case VFS_TOOMANY:
769 fprintf(stderr,
770 gettext("%s: Warning: Line for \"%s\" in vfstab has too many entries\n"),
771 myname, special);
772 break;
773 default:
774 fprintf(stderr, gettext(
775 "%s: Warning: Error in line for \"%s\" in vfstab\n"),
776 myname, special);
777 }
778 }
779
780 void
781 mnterror(int flag)
782 {
783 switch (flag) {
784 case MNT_TOOLONG:
785 fprintf(stderr,
786 gettext("%s: Line in mnttab exceeds %d characters\n"),
787 myname, MNT_LINE_MAX-2);
788 break;
789 case MNT_TOOFEW:
790 fprintf(stderr,
791 gettext("%s: Line in mnttab has too few entries\n"),
792 myname);
793 break;
794 case MNT_TOOMANY:
795 fprintf(stderr,
796 gettext("%s: Line in mnttab has too many entries\n"),
797 myname);
798 break;
799 }
800 exit(1);
801 }
802
803 void
804 doexec(char *fstype, char *newargv[])
805 {
806 const char *zroot = zone_get_nroot();
807 char full_path[PATH_MAX];
808 char alter_path[PATH_MAX];
809 char *vfs_path = VFS_PATH;
810 char *alt_path = ALT_PATH;
811 int i;
812
813 /* build the full pathname of the fstype dependent command. */
814 (void) snprintf(full_path, sizeof (full_path), "%s/%s/%s/%s",
815 (zroot != NULL ? zroot : ""), vfs_path, fstype, myname);
816 sprintf(alter_path, "%s/%s/%s", alt_path, fstype, myname);
817 newargv[1] = myname;
818
819 if (Vflg) {
820 printf("%s -F %s", newargv[1], fstype);
821 for (i = 2; newargv[i]; i++)
822 printf(" %s", newargv[i]);
823 printf("\n");
824 fflush(stdout);
825 exit(0);
826 }
827
828 /*
829 * Try to exec the fstype dependent portion of the mount.
830 * See if the directory is there before trying to exec dependent
831 * portion. This is only useful for eliminating the
832 * '..mount: not found' message when '/usr' is mounted
833 */
834 if (access(full_path, 0) == 0) {
835 execv(full_path, &newargv[1]);
836 if (errno == EACCES) {
837 fprintf(stderr,
838 gettext("%s: Cannot execute %s - permission denied\n"),
839 myname, full_path);
840 }
841 if (errno == ENOEXEC) {
842 newargv[0] = "sh";
843 newargv[1] = full_path;
844 execv("/sbin/sh", &newargv[0]);
845 }
846 }
847 execv(alter_path, &newargv[1]);
848 if (errno == EACCES) {
849 fprintf(stderr, gettext(
850 "%s: Cannot execute %s - permission denied\n"),
851 myname, alter_path);
852 exit(1);
853 }
854 if (errno == ENOEXEC) {
855 newargv[0] = "sh";
856 newargv[1] = alter_path;
857 execv("/sbin/sh", &newargv[0]);
858 }
859 fprintf(stderr,
860 gettext("%s: Operation not applicable to FSType %s\n"),
861 myname, fstype);
862 exit(1);
863 }
864
865 char *mntopts[] = { MNTOPT_IGNORE, NULL };
866 #define IGNORE 0
867
868 /*
869 * Return 1 if "ignore" appears in the options string
870 */
871 int
872 ignore(char *opts)
873 {
874 char *value;
875 char *saveptr, *my_opts;
876 int rval = 0;
877
878 if (opts == NULL || *opts == NULL)
879 return (0);
880
881 /*
882 * we make a copy of the option string to pass to getsubopt(),
883 * because getsubopt() modifies the string. We also save
884 * the original pointer returned by strdup, because getsubopt
885 * changes the pointer passed into it. If strdup fails (unlikely),
886 * we act as if the "ignore" option isn't set rather than fail.
887 */
888
889 if ((saveptr = my_opts = strdup(opts)) == NULL)
890 nomem();
891
892 while (*my_opts != '\0') {
893 if (getsubopt(&my_opts, mntopts, &value) == IGNORE)
894 rval = 1;
895 }
896
897 free(saveptr);
898
899 return (rval);
900 }
901
902 /*
903 * Perform the parallel version of mount. If count == 0, mount all
904 * vfstab filesystems with the automnt field == "yes". Use fstype if
905 * supplied. If mntlist supplied, then attempt to only mount those.
906 */
907
908 int
909 parmount(char **mntlist, int count, char *fstype)
910 {
911 int maxfd = OPEN_MAX;
912 struct rlimit rl;
913 vfsent_t **vl, *vp;
914
915 /*
916 * Process scaling. After running a series
917 * of tests based on the number of simultaneous processes and
918 * processors available, optimum performance was achieved near or
919 * at (PROCN * 2).
920 */
921 if ((maxrun = sysconf(_SC_NPROCESSORS_ONLN)) == -1)
922 maxrun = 4;
923 else
924 maxrun = maxrun * 2 + 1;
925
926 if (getrlimit(RLIMIT_NOFILE, &rl) == 0) {
927 rl.rlim_cur = rl.rlim_max;
928 if (setrlimit(RLIMIT_NOFILE, &rl) == 0)
929 maxfd = (int)rl.rlim_cur;
930 }
931 (void) enable_extended_FILE_stdio(-1, -1);
932
933 /*
934 * The parent needs to maintain 3 of its own fd's, plus 2 for
935 * each child (the stdout and stderr pipes).
936 */
937 maxfd = (maxfd / 2) - 6; /* 6 takes care of temporary */
938 /* periods of open fds */
939 if (maxfd < maxrun)
940 maxrun = maxfd;
941 if (maxrun < 4)
942 maxrun = 4; /* sanity check */
943
944 if (count == 0)
945 mntlist = NULL; /* used as a flag later */
946 else
947 fstype = NULL; /* mount points supplied: */
948 /* ignore fstype */
949 /*
950 * Read the whole vfstab into a linked list for quick processing.
951 * On average, this is the most efficient way to collect and
952 * manipulate the vfstab data.
953 */
954 vfsll = getvfsall(fstype, mntlist == NULL);
955
956 /*
957 * Make an array out of the vfs linked list for sorting purposes.
958 */
959 if (vfsll == NULL ||
960 (vfsarray = make_vfsarray(mntlist, count)) == NULL) {
961 if (mntlist == NULL) /* not an error - just none found */
962 return (0);
963
964 fprintf(stderr, gettext("%s: No valid entries found in %s\n"),
965 myname, vfstab);
966 return (1);
967 }
968
969 /*
970 * Sort the entries based on their resolved path names
971 *
972 * If an lofs is encountered, then the original order of the vfstab
973 * file needs to be maintained until we are done mounting lofs's.
974 */
975 if (!lofscnt)
976 qsort((void *)vfsarray, vfsarraysize, sizeof (vfsent_t *),
977 mlevelcmp);
978
979 /*
980 * Shrink the vfsll linked list down to the new list. This will
981 * speed up the pid search in cleanupkid() later.
982 */
983 vfsll = vfsarray[0];
984 for (vl = vfsarray; vp = *vl; )
985 vp->next = *++vl;
986
987 /*
988 * Try to handle interrupts in a reasonable way.
989 */
990 sigset(SIGHUP, cleanup);
991 sigset(SIGQUIT, cleanup);
992 sigset(SIGINT, cleanup);
993
994 do_mounts(); /* do the mounts */
995
996 if (failcnt > 0 && failcnt == lofsfail)
997 return (ALL_LOFS_FAILURES);
998
999 return (exitcode);
1000 }
1001
1002 /*
1003 * Read all vstab (fp) entries into memory if fstype == NULL.
1004 * If fstype is specified, than read all those that match it.
1005 *
1006 * Returns a linked list.
1007 */
1008 vfsent_t *
1009 getvfsall(char *fstype, int takeall)
1010 {
1011 vfsent_t *vhead, *vtail;
1012 struct vfstab vget;
1013 FILE *fp;
1014 int cnt = 0, ret;
1015
1016 if ((fp = fopen(vfstab, "r")) == NULL) {
1017 fprintf(stderr, gettext("%s: Cannot open %s\n"),
1018 myname, vfstab);
1019 exit(1);
1020 }
1021
1022 vhead = vtail = NULL;
1023
1024 while ((ret = getvfsent(fp, &vget)) != -1) {
1025 vfsent_t *vp;
1026
1027 if (ret > 0) {
1028 vfserror(ret, vget.vfs_mountp);
1029 continue;
1030 }
1031
1032 /*
1033 * If mount points were not specified, then we ignore
1034 * entries that aren't marked "yes".
1035 */
1036 if (takeall &&
1037 (vget.vfs_automnt == NULL ||
1038 strcmp(vget.vfs_automnt, "yes")))
1039 continue;
1040
1041 if (fstype && vget.vfs_fstype &&
1042 strcmp(fstype, vget.vfs_fstype))
1043 continue;
1044
1045 if (vget.vfs_mountp == NULL ||
1046 (vget.vfs_fstype && (strcmp(vget.vfs_fstype, "swap") == 0)))
1047 continue;
1048
1049 if (check_fields(vget.vfs_fstype, vget.vfs_mountp)) {
1050 exitcode = 1;
1051 continue;
1052 }
1053
1054 vp = new_vfsent(&vget, cnt); /* create new vfs entry */
1055 if (vhead == NULL)
1056 vhead = vp;
1057 else
1058 vtail->next = vp;
1059 vtail = vp;
1060 cnt++;
1061 }
1062 fclose(fp);
1063 if (vtail == NULL) {
1064 vfsarraysize = 0;
1065 vfslltail = NULL;
1066 return (NULL);
1067 }
1068 vtail->next = NULL;
1069 vfslltail = vtail; /* save it in the global variable */
1070 vfsarraysize = cnt;
1071 return (vhead);
1072 }
1073
1074
1075 /*
1076 * Returns an array of vfsent_t's based on vfsll & mntlist.
1077 */
1078 vfsent_t **
1079 make_vfsarray(char **mntlist, int count)
1080 {
1081 vfsent_t *vp, *vmark, *vpprev, **vpp;
1082 int ndx, found;
1083
1084 if (vfsll == NULL)
1085 return (NULL);
1086
1087 if (count > 0)
1088 vfsarraysize = count;
1089
1090 vpp = (vfsent_t **)malloc(sizeof (*vpp) * (vfsarraysize + 1));
1091 if (vpp == NULL)
1092 nomem();
1093
1094 if (mntlist == NULL) {
1095 /*
1096 * No mount list specified: take all vfstab mount points.
1097 */
1098 for (ndx = 0, vp = vfsll; vp; vp = vp->next) {
1099 (void) setrpath(vp);
1100 /*
1101 * Sigh. lofs entries can complicate matters so much
1102 * that the best way to avoid problems is to
1103 * stop parallel mounting when an lofs is
1104 * encountered, so we keep a count of how many
1105 * there are.
1106 * Fortunately this is rare.
1107 */
1108 if (vp->v.vfs_fstype &&
1109 (strcmp(vp->v.vfs_fstype, MNTTYPE_LOFS) == 0))
1110 lofscnt++;
1111
1112 vpp[ndx++] = vp;
1113 }
1114 vpp[ndx] = NULL;
1115 return (vpp);
1116 }
1117
1118 /*
1119 * A list of mount points was specified on the command line
1120 * and we need to search for each one.
1121 */
1122 vpprev = vfslltail;
1123 vpprev->next = vfsll; /* make a circle out of it */
1124 vmark = vp = vfsll;
1125 /*
1126 * For each specified mount point:
1127 */
1128 for (ndx = 0; *mntlist; mntlist++) {
1129 found = 0;
1130 /*
1131 * Circle our entire linked list, looking for *mntlist.
1132 */
1133 while (vp) {
1134 if (strcmp(*mntlist, vp->v.vfs_mountp) == 0) {
1135 vpp[ndx++] = vp; /* found it. */
1136 (void) setrpath(vp);
1137 if (vp->v.vfs_fstype &&
1138 (strcmp(vp->v.vfs_fstype,
1139 MNTTYPE_LOFS) == 0))
1140 lofscnt++;
1141
1142 if (vp == vpprev) { /* list exhausted */
1143 vp = NULL;
1144 found++;
1145 break;
1146 }
1147 /*
1148 * Remove it from the circular list. vpprev
1149 * remains unchanged.
1150 */
1151 vp = vp->next;
1152 vpprev->next->next = NULL;
1153 vpprev->next = vp;
1154 /*
1155 * Set vmark to the first elem that we check
1156 * each time.
1157 */
1158 vmark = vp;
1159 found++;
1160 break;
1161 }
1162 vpprev = vp;
1163 vp = vp->next;
1164 if (vp == vmark) /* break out if we completed */
1165 /* the circle */
1166 break;
1167 }
1168
1169 if (!found) {
1170 fprintf(stderr, gettext(
1171 "%s: Warning: %s not found in %s\n"),
1172 myname, *mntlist, vfstab);
1173 exitcode = 1;
1174 }
1175 }
1176 if (ndx == 0)
1177 return (NULL);
1178
1179 vpp[ndx] = NULL; /* null terminate the list */
1180 vfsarraysize = ndx; /* adjust vfsarraysize */
1181 return (vpp);
1182 }
1183
1184 /*
1185 * Performs the exec argument processing, all of the child forking and
1186 * execing, and child cleanup.
1187 * Sets exitcode to non-zero if any errors occurred.
1188 */
1189 void
1190 do_mounts(void)
1191 {
1192 int i, isave, cnt;
1193 vfsent_t *vp, *vpprev, **vl;
1194 char *newargv[ARGV_MAX];
1195 pid_t child;
1196
1197 /*
1198 * create the arg list once; the only differences among
1199 * the calls are the options, special and mountp fields.
1200 */
1201 i = 2;
1202 if (cflg)
1203 newargv[i++] = "-c";
1204 if (gflg)
1205 newargv[i++] = "-g";
1206 if (mflg)
1207 newargv[i++] = "-m";
1208 if (Oflg)
1209 newargv[i++] = "-O";
1210 if (qflg)
1211 newargv[i++] = "-q";
1212 if (rflg)
1213 newargv[i++] = "-r";
1214 if (dashflg)
1215 newargv[i++] = "--";
1216 if (oflg) {
1217 newargv[i++] = "-o";
1218 newargv[i++] = specific_opts;
1219 }
1220 isave = i;
1221
1222 /*
1223 * Main loop for the mount processes
1224 */
1225 vl = vfsarray;
1226 cnt = vfsarraysize;
1227 for (vpprev = *vl; vp = *vl; vpprev = vp, vl++, cnt--) {
1228 /*
1229 * Check to see if we cross a mount level: e.g.,
1230 * /a/b -> /a/b/c. If so, we need to wait for all current
1231 * mounts to finish, rerun realpath on the remaining mount
1232 * points, and resort the list.
1233 *
1234 * Also, we mount serially as long as there are lofs's
1235 * to mount to avoid improper mount ordering.
1236 */
1237 if (vp->mlevel > vpprev->mlevel || lofscnt > 0) {
1238 vfsent_t **vlp;
1239
1240 while (nrun > 0 && (dowait() != -1))
1241 ;
1242 /*
1243 * Gads! It's possible for real path mounts points to
1244 * change after mounts are done at a lower mount
1245 * level.
1246 * Thus, we need to recalculate mount levels and
1247 * resort the list from this point.
1248 */
1249 for (vlp = vl; *vlp; vlp++)
1250 (void) setrpath(*vlp);
1251 /*
1252 * Sort the remaining entries based on their newly
1253 * resolved path names.
1254 * Do not sort if we still have lofs's to mount.
1255 */
1256 if (lofscnt == 0) {
1257 qsort((void *)vl, cnt, sizeof (vfsent_t *),
1258 mlevelcmp);
1259 vp = *vl;
1260 }
1261 }
1262
1263 if (vp->flag & VRPFAILED) {
1264 fprintf(stderr, gettext(
1265 "%s: Nonexistent mount point: %s\n"),
1266 myname, vp->v.vfs_mountp);
1267 vp->flag |= VNOTMOUNTED;
1268 exitcode = 1;
1269 continue;
1270 }
1271
1272 /*
1273 * If mount options were not specified on the command
1274 * line, then use the ones found in the vfstab entry,
1275 * if any.
1276 */
1277 i = isave;
1278 if (!oflg && vp->v.vfs_mntopts) {
1279 newargv[i++] = "-o";
1280 newargv[i++] = vp->v.vfs_mntopts;
1281 }
1282 newargv[i++] = vp->v.vfs_special;
1283 newargv[i++] = vp->rpath;
1284 newargv[i] = NULL;
1285
1286 /*
1287 * This should never really fail.
1288 */
1289 while (setup_iopipe(vp) == -1 && (dowait() != -1))
1290 ;
1291
1292 while (nrun >= maxrun && (dowait() != -1)) /* throttle */
1293 ;
1294
1295 if ((child = fork()) == -1) {
1296 perror("fork");
1297 cleanup(-1);
1298 /* not reached */
1299 }
1300 if (child == 0) { /* child */
1301 signal(SIGHUP, SIG_IGN);
1302 signal(SIGQUIT, SIG_IGN);
1303 signal(SIGINT, SIG_IGN);
1304 setup_output(vp);
1305 doexec(vp->v.vfs_fstype, newargv);
1306 perror("exec");
1307 exit(1);
1308 }
1309
1310 /* parent */
1311 (void) close(vp->sopipe[WRPIPE]);
1312 (void) close(vp->sepipe[WRPIPE]);
1313 vp->pid = child;
1314 nrun++;
1315 }
1316 /*
1317 * Mostly done by now - wait and clean up the stragglers.
1318 */
1319 cleanup(0);
1320 }
1321
1322
1323 /*
1324 * Setup stdout and stderr pipes for the children's output.
1325 */
1326 int
1327 setup_iopipe(vfsent_t *mp)
1328 {
1329 /*
1330 * Make a stdout and stderr pipe. This should never fail.
1331 */
1332 if (pipe(mp->sopipe) == -1)
1333 return (-1);
1334 if (pipe(mp->sepipe) == -1) {
1335 (void) close(mp->sopipe[RDPIPE]);
1336 (void) close(mp->sopipe[WRPIPE]);
1337 return (-1);
1338 }
1339 /*
1340 * Don't block on an empty pipe.
1341 */
1342 (void) fcntl(mp->sopipe[RDPIPE], F_SETFL, O_NDELAY|O_NONBLOCK);
1343 (void) fcntl(mp->sepipe[RDPIPE], F_SETFL, O_NDELAY|O_NONBLOCK);
1344 /*
1345 * Don't pass extra fds into children.
1346 */
1347 (void) fcntl(mp->sopipe[RDPIPE], F_SETFD, FD_CLOEXEC);
1348 (void) fcntl(mp->sepipe[RDPIPE], F_SETFD, FD_CLOEXEC);
1349
1350 return (0);
1351 }
1352
1353 /*
1354 * Called by a child to attach its stdout and stderr to the write side of
1355 * the pipes.
1356 */
1357 void
1358 setup_output(vfsent_t *vp)
1359 {
1360
1361 (void) close(fileno(stdout));
1362 (void) dup(vp->sopipe[WRPIPE]);
1363 (void) close(vp->sopipe[WRPIPE]);
1364
1365 (void) close(fileno(stderr));
1366 (void) dup(vp->sepipe[WRPIPE]);
1367 (void) close(vp->sepipe[WRPIPE]);
1368 }
1369
1370 /*
1371 * Parent uses this to print any stdout or stderr output issued by
1372 * the child.
1373 */
1374 static void
1375 doio(vfsent_t *vp)
1376 {
1377 int bytes;
1378 char ibuf[BUFSIZ];
1379
1380 while ((bytes = read(vp->sepipe[RDPIPE], ibuf, sizeof (ibuf))) > 0)
1381 write(fileno(stderr), ibuf, bytes);
1382 while ((bytes = read(vp->sopipe[RDPIPE], ibuf, sizeof (ibuf))) > 0)
1383 write(fileno(stdout), ibuf, bytes);
1384
1385 (void) close(vp->sopipe[RDPIPE]);
1386 (void) close(vp->sepipe[RDPIPE]);
1387 }
1388
1389 /*
1390 * Waits for 1 child to die.
1391 *
1392 * Returns -1 if no children are left to wait for.
1393 * Returns 0 if a child died without an error.
1394 * Returns 1 if a child died with an error.
1395 */
1396 int
1397 dowait(void)
1398 {
1399 int child, wstat;
1400
1401 if ((child = wait(&wstat)) == -1)
1402 return (-1);
1403 nrun--;
1404 return (cleanupkid(child, wstat) != 0);
1405 }
1406
1407 /*
1408 * Locates the child mount process represented by pid, outputs any io
1409 * it may have, and returns its exit code.
1410 * Sets the global exitcode if an error occurred.
1411 */
1412 int
1413 cleanupkid(pid_t pid, int wstat)
1414 {
1415 vfsent_t *vp, *prevp;
1416 int ret;
1417
1418 if (WIFEXITED(wstat)) /* this should always be true */
1419 ret = WEXITSTATUS(wstat);
1420 else
1421 ret = 1; /* assume some kind of error */
1422 if (ret) {
1423 exitcode = 1;
1424 failcnt++;
1425 }
1426
1427 /*
1428 * Find our child.
1429 * This search gets smaller and smaller as children are cleaned
1430 * up.
1431 */
1432 for (prevp = NULL, vp = vfsll; vp; vp = vp->next) {
1433 if (vp->pid != pid) {
1434 prevp = vp;
1435 continue;
1436 }
1437 /*
1438 * Found: let's remove it from this linked list.
1439 */
1440 if (prevp) {
1441 prevp->next = vp->next;
1442 vp->next = NULL;
1443 }
1444 break;
1445 }
1446
1447 if (vp == NULL) {
1448 /*
1449 * This should never happen.
1450 */
1451 fprintf(stderr, gettext(
1452 "%s: Unknown child %d\n"), myname, pid);
1453 exitcode = 1;
1454 return (ret);
1455 }
1456 doio(vp); /* Any output? */
1457
1458 if (vp->v.vfs_fstype &&
1459 (strcmp(vp->v.vfs_fstype, MNTTYPE_LOFS) == 0)) {
1460 lofscnt--;
1461 if (ret)
1462 lofsfail++;
1463 }
1464
1465 vp->exitcode = ret;
1466 return (ret);
1467 }
1468
1469
1470 static vfsent_t zvmount = { 0 };
1471
1472 vfsent_t *
1473 new_vfsent(struct vfstab *vin, int order)
1474 {
1475 vfsent_t *new;
1476
1477 new = (vfsent_t *)malloc(sizeof (*new));
1478 if (new == NULL)
1479 nomem();
1480
1481 *new = zvmount;
1482 if (vin->vfs_special &&
1483 (new->v.vfs_special = strdup(vin->vfs_special)) == NULL)
1484 nomem();
1485 if (vin->vfs_mountp &&
1486 (new->v.vfs_mountp = strdup(vin->vfs_mountp)) == NULL)
1487 nomem();
1488 if (vin->vfs_fstype &&
1489 (new->v.vfs_fstype = strdup(vin->vfs_fstype)) == NULL)
1490 nomem();
1491 /*
1492 * If specific mount options were specified on the command
1493 * line, then use those. Else, use the ones on the vfstab
1494 * line, if any. In other words, specific options on the
1495 * command line override those in /etc/vfstab.
1496 */
1497 if (oflg) {
1498 if ((new->v.vfs_mntopts = strdup(specific_opts)) == NULL)
1499 nomem();
1500 } else if (vin->vfs_mntopts &&
1501 (new->v.vfs_mntopts = strdup(vin->vfs_mntopts)) == NULL)
1502 nomem();
1503
1504 new->order = order;
1505 return (new);
1506 }
1507
1508 /*
1509 * Runs realpath on vp's mount point, records success or failure,
1510 * resets the mount level based on the new realpath, and returns
1511 * realpath()'s return value.
1512 */
1513 char *
1514 setrpath(vfsent_t *vp)
1515 {
1516 char *rp;
1517
1518 if ((rp = realpath(vp->v.vfs_mountp, realdir)) == NULL)
1519 vp->flag |= VRPFAILED;
1520 else
1521 vp->flag &= ~VRPFAILED;
1522
1523 if (vp->rpath)
1524 free(vp->rpath);
1525 if ((vp->rpath = strdup(realdir)) == NULL)
1526 nomem();
1527 vp->mlevel = fsgetmlevel(vp->rpath);
1528 return (rp);
1529 }
1530
1531
1532 /*
1533 * sort first by mlevel (1...N), then by vfstab order.
1534 */
1535 int
1536 mlevelcmp(const void *a, const void *b)
1537 {
1538 vfsent_t *a1, *b1;
1539 int lcmp;
1540
1541 a1 = *(vfsent_t **)a;
1542 b1 = *(vfsent_t **)b;
1543
1544 lcmp = a1->mlevel - b1->mlevel;
1545 if (lcmp == 0)
1546 lcmp = a1->order - b1->order;
1547 return (lcmp);
1548 }
1549
1550 /* sort by vfstab order. 0..N */
1551 static int
1552 mordercmp(const void *a, const void *b)
1553 {
1554 vfsent_t *a1, *b1;
1555
1556 a1 = *(vfsent_t **)a;
1557 b1 = *(vfsent_t **)b;
1558 return (a1->order - b1->order);
1559 }
1560
1561 /*
1562 * cleanup the existing children and exit with an error
1563 * if asig != 0.
1564 */
1565 void
1566 cleanup(int asig)
1567 {
1568 while (nrun > 0 && (dowait() != -1))
1569 ;
1570
1571 if (asig != 0)
1572 exit(1);
1573 }
1574
1575
1576 int
1577 check_fields(char *fstype, char *mountp)
1578 {
1579 struct stat64 stbuf;
1580
1581 if (fstype == NULL) {
1582 fprintf(stderr,
1583 gettext("%s: FSType cannot be determined\n"),
1584 myname);
1585 return (1);
1586 }
1587 if (strlen(fstype) > (size_t)FSTYPE_MAX) {
1588 fprintf(stderr,
1589 gettext("%s: FSType %s exceeds %d characters\n"),
1590 myname, fstype, FSTYPE_MAX);
1591 return (1);
1592 }
1593
1594 if (mountp == NULL) {
1595 fprintf(stderr,
1596 gettext("%s: Mount point cannot be determined\n"),
1597 myname);
1598 return (1);
1599 }
1600 if (*mountp != '/') {
1601 fprintf(stderr, gettext(
1602 "%s: Mount point %s is not an absolute pathname.\n"),
1603 myname, mountp);
1604 return (1);
1605 }
1606 /*
1607 * Don't do some of these checks if aflg because a mount point may
1608 * not exist now, but will be mounted before we get to it.
1609 * This is one of the quirks of "secondary mounting".
1610 */
1611 if (!aflg && stat64(mountp, &stbuf) < 0) {
1612 if (errno == ENOENT || errno == ENOTDIR)
1613 fprintf(stderr,
1614 gettext("%s: Mount point %s does not exist.\n"),
1615 myname, mountp);
1616 else {
1617 fprintf(stderr,
1618 gettext("%s: Cannot stat mount point %s.\n"),
1619 myname, mountp);
1620 perror(myname);
1621 }
1622 return (1);
1623 }
1624 return (0);
1625 }
1626
1627 void
1628 nomem(void)
1629 {
1630 fprintf(stderr, gettext("%s: Out of memory\n"), myname);
1631 while (nrun > 0 && (dowait() != -1))
1632 ;
1633 exit(1);
1634 }