sbin/fsck/preen.c

   1 /*      $NetBSD: preen.c,v 1.18 1998/07/26 20:02:36 mycroft Exp $       */
   2
   3 /*-
   4  * SPDX-License-Identifier: BSD-3-Clause
   5  *
   6  * Copyright (c) 1990, 1993
   7  *      The Regents of the University of California.  All rights reserved.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  * 3. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 #include <sys/cdefs.h>
  35 #ifndef lint
  36 #if 0
  37 static char sccsid[] = "@(#)preen.c     8.5 (Berkeley) 4/28/95";
  38 #else
  39 __RCSID("$NetBSD: preen.c,v 1.18 1998/07/26 20:02:36 mycroft Exp $");
  40 #endif
  41 #endif /* not lint */
  42
  43 #include <sys/param.h>
  44 #include <sys/stat.h>
  45 #include <sys/wait.h>
  46 #include <sys/queue.h>
  47
  48 #include <err.h>
  49 #include <ctype.h>
  50 #include <fstab.h>
  51 #include <string.h>
  52 #include <stdio.h>
  53 #include <stdlib.h>
  54 #include <unistd.h>
  55
  56 #include "fsutil.h"
  57
  58 struct partentry {
  59         TAILQ_ENTRY(partentry)   p_entries;
  60         char                    *p_devname;     /* device name */
  61         char                    *p_mntpt;       /* mount point */
  62         char                    *p_type;        /* file system type */
  63         int                      p_failok;      /* failok option set */
  64 };
  65
  66 static TAILQ_HEAD(part, partentry) badh;
  67
  68 struct diskentry {
  69         TAILQ_ENTRY(diskentry)      d_entries;
  70         char                       *d_name;     /* disk base name */
  71         TAILQ_HEAD(prt, partentry)  d_part;     /* list of partitions on disk */
  72         int                         d_pid;      /* 0 or pid of fsck proc */
  73 };
  74
  75 static TAILQ_HEAD(disk, diskentry) diskh;
  76
  77 static int nrun = 0, ndisks = 0;
  78
  79 static struct diskentry *finddisk(const char *);
  80 static void addpart(const char *, const char *, const char *, const int);
  81 static int startdisk(struct diskentry *,
  82     int (*)(const char *, const char *, const char *, const char *, pid_t *));
  83 static void printpart(void);
  84
  85 int
  86 checkfstab(int flags, int (*docheck)(struct fstab *),
  87     int (*checkit)(const char *, const char *, const char *, const char *, pid_t *))
  88 {
  89         struct fstab *fs;
  90         struct diskentry *d, *nextdisk;
  91         struct partentry *p;
  92         int ret, pid, retcode, passno, sumstatus, status, nextpass;
  93         const char *name;
  94
  95         TAILQ_INIT(&badh);
  96         TAILQ_INIT(&diskh);
  97
  98         sumstatus = 0;
  99
 100         nextpass = 0;
 101         for (passno = 1; nextpass != INT_MAX; passno = nextpass) {
 102                 if (flags & CHECK_DEBUG)
 103                         printf("pass %d\n", passno);
 104
 105                 nextpass = INT_MAX;
 106                 if (setfsent() == 0) {
 107                         warnx("Can't open checklist file: %s\n", _PATH_FSTAB);
 108                         return (8);
 109                 }
 110                 while ((fs = getfsent()) != NULL) {
 111                         name = fs->fs_spec;
 112                         if (fs->fs_passno > passno && fs->fs_passno < nextpass)
 113                                 nextpass = fs->fs_passno;
 114
 115                         if (passno != fs->fs_passno)
 116                                 continue;
 117
 118                         if ((*docheck)(fs) == 0)
 119                                 continue;
 120
 121                         if (flags & CHECK_DEBUG)
 122                                 printf("pass %d, name %s\n", passno, name);
 123
 124                         if ((flags & CHECK_PREEN) == 0 || passno == 1 ||
 125                             (flags & DO_BACKGRD) != 0) {
 126                                 if (name == NULL) {
 127                                         if (flags & CHECK_PREEN)
 128                                                 return 8;
 129                                         else
 130                                                 continue;
 131                                 }
 132                                 sumstatus = (*checkit)(fs->fs_vfstype,
 133                                     name, fs->fs_file, NULL, NULL);
 134                                 if (sumstatus)
 135                                         return (sumstatus);
 136                                 continue;
 137                         }
 138                         if (name == NULL) {
 139                                 (void) fprintf(stderr,
 140                                     "BAD DISK NAME %s\n", fs->fs_spec);
 141                                 sumstatus |= 8;
 142                                 continue;
 143                         }
 144                         addpart(fs->fs_vfstype, name, fs->fs_file,
 145                             getfsopt(fs, "failok"));
 146                 }
 147
 148                 if ((flags & CHECK_PREEN) == 0 || passno == 1 ||
 149                     (flags & DO_BACKGRD) != 0)
 150                         continue;
 151
 152                 if (flags & CHECK_DEBUG) {
 153                         printf("Parallel start\n");
 154                         printpart();
 155                 }
 156
 157                 TAILQ_FOREACH(nextdisk, &diskh, d_entries) {
 158                         if ((ret = startdisk(nextdisk, checkit)) != 0)
 159                                 return ret;
 160                 }
 161
 162                 if (flags & CHECK_DEBUG)
 163                         printf("Parallel wait\n");
 164                 while ((pid = wait(&status)) != -1) {
 165                         TAILQ_FOREACH(d, &diskh, d_entries)
 166                                 if (d->d_pid == pid)
 167                                         break;
 168
 169                         if (d == NULL) {
 170                                 warnx("Unknown pid %d\n", pid);
 171                                 continue;
 172                         }
 173
 174                         p = TAILQ_FIRST(&d->d_part);
 175
 176                         if (WIFEXITED(status) == 0) {
 177                                 retcode = 0;
 178                         } else if (p->p_failok == 0) {
 179                                 retcode = WEXITSTATUS(status);
 180                         } else {
 181                                 retcode = 0;
 182                                 fprintf(stderr, "%s: failok SPECIFIED, FSCK "
 183                                     "ERROR(S) IGNORED\n", p->p_devname);
 184                         }
 185
 186                         if (flags & (CHECK_DEBUG|CHECK_VERBOSE))
 187                                 (void) printf("done %s: %s (%s) = 0x%x\n",
 188                                     p->p_type, p->p_devname, p->p_mntpt,
 189                                     status);
 190
 191                         if (WIFSIGNALED(status)) {
 192                                 (void) fprintf(stderr,
 193                                     "%s: %s (%s): EXITED WITH SIGNAL %d\n",
 194                                     p->p_type, p->p_devname, p->p_mntpt,
 195                                     WTERMSIG(status));
 196                                 retcode = 8;
 197                         }
 198
 199                         TAILQ_REMOVE(&d->d_part, p, p_entries);
 200
 201                         if (retcode != 0) {
 202                                 TAILQ_INSERT_TAIL(&badh, p, p_entries);
 203                                 sumstatus |= retcode;
 204                         } else {
 205                                 free(p->p_type);
 206                                 free(p->p_devname);
 207                                 free(p);
 208                         }
 209                         d->d_pid = 0;
 210                         nrun--;
 211
 212                         if (TAILQ_EMPTY(&d->d_part)) {
 213                                 TAILQ_REMOVE(&diskh, d, d_entries);
 214                                 ndisks--;
 215                         } else {
 216                                 if ((ret = startdisk(d, checkit)) != 0)
 217                                         return ret;
 218                         }
 219                 }
 220                 if (flags & CHECK_DEBUG) {
 221                         printf("Parallel end\n");
 222                         printpart();
 223                 }
 224         }
 225
 226         if (!(flags & CHECK_PREEN))
 227                         return 0;
 228
 229         if (sumstatus) {
 230                 p = TAILQ_FIRST(&badh);
 231                 if (p == NULL)
 232                         return (sumstatus);
 233
 234                 (void) fprintf(stderr,
 235                         "THE FOLLOWING FILE SYSTEM%s HAD AN %s\n\t",
 236                         TAILQ_NEXT(p, p_entries) ? "S" : "",
 237                         "UNEXPECTED INCONSISTENCY:");
 238
 239                 for (; p; p = TAILQ_NEXT(p, p_entries))
 240                         (void) fprintf(stderr,
 241                             "%s: %s (%s)%s", p->p_type, p->p_devname,
 242                             p->p_mntpt, TAILQ_NEXT(p, p_entries) ? ", " : "\n");
 243
 244                 return sumstatus;
 245         }
 246         (void) endfsent();
 247         return (0);
 248 }
 249
 250 static struct diskentry *
 251 finddisk(const char *name)
 252 {
 253         const char *p;
 254         size_t len = 0;
 255         struct diskentry *d;
 256
 257         p = strrchr(name, '/');
 258         if (p == NULL)
 259                 p = name;
 260         else
 261                 p++;
 262         for (; *p && !isdigit(*p); p++)
 263                 continue;
 264         for (; *p && isdigit(*p); p++)
 265                 continue;
 266         len = p - name;
 267         if (len == 0)
 268                 len = strlen(name);
 269
 270         TAILQ_FOREACH(d, &diskh, d_entries)
 271                 if (strncmp(d->d_name, name, len) == 0 && d->d_name[len] == 0)
 272                         return d;
 273
 274         d = emalloc(sizeof(*d));
 275         d->d_name = estrdup(name);
 276         d->d_name[len] = '\0';
 277         TAILQ_INIT(&d->d_part);
 278         d->d_pid = 0;
 279
 280         TAILQ_INSERT_TAIL(&diskh, d, d_entries);
 281         ndisks++;
 282
 283         return d;
 284 }
 285
 286
 287 static void
 288 printpart(void)
 289 {
 290         struct diskentry *d;
 291         struct partentry *p;
 292
 293         TAILQ_FOREACH(d, &diskh, d_entries) {
 294                 (void) printf("disk %s: ", d->d_name);
 295                 TAILQ_FOREACH(p, &d->d_part, p_entries)
 296                         (void) printf("%s ", p->p_devname);
 297                 (void) printf("\n");
 298         }
 299 }
 300
 301
 302 static void
 303 addpart(const char *type, const char *dev, const char *mntpt, const int failok)
 304 {
 305         struct diskentry *d = finddisk(dev);
 306         struct partentry *p;
 307
 308         TAILQ_FOREACH(p, &d->d_part, p_entries)
 309                 if (strcmp(p->p_devname, dev) == 0) {
 310                         warnx("%s in fstab more than once!\n", dev);
 311                         return;
 312                 }
 313
 314         p = emalloc(sizeof(*p));
 315         p->p_devname = estrdup(dev);
 316         p->p_mntpt = estrdup(mntpt);
 317         p->p_type = estrdup(type);
 318         p->p_failok = failok;
 319
 320         TAILQ_INSERT_TAIL(&d->d_part, p, p_entries);
 321 }
 322
 323
 324 static int
 325 startdisk(struct diskentry *d, int (*checkit)(const char *, const char *,
 326     const char *, const char *, pid_t *))
 327 {
 328         struct partentry *p = TAILQ_FIRST(&d->d_part);
 329         int rv;
 330
 331         while ((rv = (*checkit)(p->p_type, p->p_devname, p->p_mntpt,
 332             NULL, &d->d_pid)) != 0 && nrun > 0)
 333                 sleep(10);
 334
 335         if (rv == 0)
 336                 nrun++;
 337
 338         return rv;
 339 }