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  * $FreeBSD$
  34  */
  35
  36 #include <sys/cdefs.h>
  37 #ifndef lint
  38 #if 0
  39 static char sccsid[] = "@(#)preen.c     8.5 (Berkeley) 4/28/95";
  40 #else
  41 __RCSID("$NetBSD: preen.c,v 1.18 1998/07/26 20:02:36 mycroft Exp $");
  42 #endif
  43 #endif /* not lint */
  44
  45 #include <sys/param.h>
  46 #include <sys/stat.h>
  47 #include <sys/wait.h>
  48 #include <sys/queue.h>
  49
  50 #include <err.h>
  51 #include <ctype.h>
  52 #include <fstab.h>
  53 #include <string.h>
  54 #include <stdio.h>
  55 #include <stdlib.h>
  56 #include <unistd.h>
  57
  58 #include "fsutil.h"
  59
  60 struct partentry {
  61         TAILQ_ENTRY(partentry)   p_entries;
  62         char                    *p_devname;     /* device name */
  63         char                    *p_mntpt;       /* mount point */
  64         char                    *p_type;        /* file system type */
  65 };
  66
  67 static TAILQ_HEAD(part, partentry) badh;
  68
  69 struct diskentry {
  70         TAILQ_ENTRY(diskentry)      d_entries;
  71         char                       *d_name;     /* disk base name */
  72         TAILQ_HEAD(prt, partentry)  d_part;     /* list of partitions on disk */
  73         int                         d_pid;      /* 0 or pid of fsck proc */
  74 };
  75
  76 static TAILQ_HEAD(disk, diskentry) diskh;
  77
  78 static int nrun = 0, ndisks = 0;
  79
  80 static struct diskentry *finddisk(const char *);
  81 static void addpart(const char *, const char *, const char *);
  82 static int startdisk(struct diskentry *,
  83     int (*)(const char *, const char *, const char *, const char *, pid_t *));
  84 static void printpart(void);
  85
  86 int
  87 checkfstab(int flags, int (*docheck)(struct fstab *),
  88     int (*checkit)(const char *, const char *, const char *, const char *, pid_t *))
  89 {
  90         struct fstab *fs;
  91         struct diskentry *d, *nextdisk;
  92         struct partentry *p;
  93         int ret, pid, retcode, passno, sumstatus, status, nextpass;
  94         const char *name;
  95
  96         TAILQ_INIT(&badh);
  97         TAILQ_INIT(&diskh);
  98
  99         sumstatus = 0;
 100
 101         nextpass = 0;
 102         for (passno = 1; nextpass != INT_MAX; passno = nextpass) {
 103                 if (flags & CHECK_DEBUG)
 104                         printf("pass %d\n", passno);
 105
 106                 nextpass = INT_MAX;
 107                 if (setfsent() == 0) {
 108                         warnx("Can't open checklist file: %s\n", _PATH_FSTAB);
 109                         return (8);
 110                 }
 111                 while ((fs = getfsent()) != NULL) {
 112                         name = fs->fs_spec;
 113                         if (fs->fs_passno > passno && fs->fs_passno < nextpass)
 114                                 nextpass = fs->fs_passno;
 115
 116                         if (passno != fs->fs_passno)
 117                                 continue;
 118
 119                         if ((*docheck)(fs) == 0)
 120                                 continue;
 121
 122                         if (flags & CHECK_DEBUG)
 123                                 printf("pass %d, name %s\n", passno, name);
 124
 125                         if ((flags & CHECK_PREEN) == 0 || passno == 1 ||
 126                             (flags & DO_BACKGRD) != 0) {
 127                                 if (name == NULL) {
 128                                         if (flags & CHECK_PREEN)
 129                                                 return 8;
 130                                         else
 131                                                 continue;
 132                                 }
 133                                 sumstatus = (*checkit)(fs->fs_vfstype,
 134                                     name, fs->fs_file, NULL, NULL);
 135
 136                                 if (sumstatus)
 137                                         return (sumstatus);
 138                                 continue;
 139                         }
 140                         if (name == NULL) {
 141                                 (void) fprintf(stderr,
 142                                     "BAD DISK NAME %s\n", fs->fs_spec);
 143                                 sumstatus |= 8;
 144                                 continue;
 145                         }
 146                         addpart(fs->fs_vfstype, name, fs->fs_file);
 147                 }
 148
 149                 if ((flags & CHECK_PREEN) == 0 || passno == 1 ||
 150                     (flags & DO_BACKGRD) != 0)
 151                         continue;
 152
 153                 if (flags & CHECK_DEBUG) {
 154                         printf("Parallel start\n");
 155                         printpart();
 156                 }
 157
 158                 TAILQ_FOREACH(nextdisk, &diskh, d_entries) {
 159                         if ((ret = startdisk(nextdisk, checkit)) != 0)
 160                                 return ret;
 161                 }
 162
 163                 if (flags & CHECK_DEBUG)
 164                         printf("Parallel wait\n");
 165                 while ((pid = wait(&status)) != -1) {
 166                         TAILQ_FOREACH(d, &diskh, d_entries)
 167                                 if (d->d_pid == pid)
 168                                         break;
 169
 170                         if (d == NULL) {
 171                                 warnx("Unknown pid %d\n", pid);
 172                                 continue;
 173                         }
 174
 175                         if (WIFEXITED(status))
 176                                 retcode = WEXITSTATUS(status);
 177                         else
 178                                 retcode = 0;
 179
 180                         p = TAILQ_FIRST(&d->d_part);
 181
 182                         if (flags & (CHECK_DEBUG|CHECK_VERBOSE))
 183                                 (void) printf("done %s: %s (%s) = 0x%x\n",
 184                                     p->p_type, p->p_devname, p->p_mntpt,
 185                                     status);
 186
 187                         if (WIFSIGNALED(status)) {
 188                                 (void) fprintf(stderr,
 189                                     "%s: %s (%s): EXITED WITH SIGNAL %d\n",
 190                                     p->p_type, p->p_devname, p->p_mntpt,
 191                                     WTERMSIG(status));
 192                                 retcode = 8;
 193                         }
 194
 195                         TAILQ_REMOVE(&d->d_part, p, p_entries);
 196
 197                         if (retcode != 0) {
 198                                 TAILQ_INSERT_TAIL(&badh, p, p_entries);
 199                                 sumstatus |= retcode;
 200                         } else {
 201                                 free(p->p_type);
 202                                 free(p->p_devname);
 203                                 free(p);
 204                         }
 205                         d->d_pid = 0;
 206                         nrun--;
 207
 208                         if (TAILQ_EMPTY(&d->d_part)) {
 209                                 TAILQ_REMOVE(&diskh, d, d_entries);
 210                                 ndisks--;
 211                         } else {
 212                                 if ((ret = startdisk(d, checkit)) != 0)
 213                                         return ret;
 214                         }
 215                 }
 216                 if (flags & CHECK_DEBUG) {
 217                         printf("Parallel end\n");
 218                         printpart();
 219                 }
 220         }
 221
 222         if (!(flags & CHECK_PREEN))
 223                         return 0;
 224
 225         if (sumstatus) {
 226                 p = TAILQ_FIRST(&badh);
 227                 if (p == NULL)
 228                         return (sumstatus);
 229
 230                 (void) fprintf(stderr,
 231                         "THE FOLLOWING FILE SYSTEM%s HAD AN %s\n\t",
 232                         TAILQ_NEXT(p, p_entries) ? "S" : "",
 233                         "UNEXPECTED INCONSISTENCY:");
 234
 235                 for (; p; p = TAILQ_NEXT(p, p_entries))
 236                         (void) fprintf(stderr,
 237                             "%s: %s (%s)%s", p->p_type, p->p_devname,
 238                             p->p_mntpt, TAILQ_NEXT(p, p_entries) ? ", " : "\n");
 239
 240                 return sumstatus;
 241         }
 242         (void) endfsent();
 243         return (0);
 244 }
 245
 246
 247 static struct diskentry *
 248 finddisk(const char *name)
 249 {
 250         const char *p;
 251         size_t len = 0;
 252         struct diskentry *d;
 253
 254         p = strrchr(name, '/');
 255         if (p == NULL)
 256                 p = name;
 257         else
 258                 p++;
 259         for (; *p && !isdigit(*p); p++)
 260                 continue;
 261         for (; *p && isdigit(*p); p++)
 262                 continue;
 263         len = p - name;
 264         if (len == 0)
 265                 len = strlen(name);
 266
 267         TAILQ_FOREACH(d, &diskh, d_entries)
 268                 if (strncmp(d->d_name, name, len) == 0 && d->d_name[len] == 0)
 269                         return d;
 270
 271         d = emalloc(sizeof(*d));
 272         d->d_name = estrdup(name);
 273         d->d_name[len] = '\0';
 274         TAILQ_INIT(&d->d_part);
 275         d->d_pid = 0;
 276
 277         TAILQ_INSERT_TAIL(&diskh, d, d_entries);
 278         ndisks++;
 279
 280         return d;
 281 }
 282
 283
 284 static void
 285 printpart(void)
 286 {
 287         struct diskentry *d;
 288         struct partentry *p;
 289
 290         TAILQ_FOREACH(d, &diskh, d_entries) {
 291                 (void) printf("disk %s: ", d->d_name);
 292                 TAILQ_FOREACH(p, &d->d_part, p_entries)
 293                         (void) printf("%s ", p->p_devname);
 294                 (void) printf("\n");
 295         }
 296 }
 297
 298
 299 static void
 300 addpart(const char *type, const char *dev, const char *mntpt)
 301 {
 302         struct diskentry *d = finddisk(dev);
 303         struct partentry *p;
 304
 305         TAILQ_FOREACH(p, &d->d_part, p_entries)
 306                 if (strcmp(p->p_devname, dev) == 0) {
 307                         warnx("%s in fstab more than once!\n", dev);
 308                         return;
 309                 }
 310
 311         p = emalloc(sizeof(*p));
 312         p->p_devname = estrdup(dev);
 313         p->p_mntpt = estrdup(mntpt);
 314         p->p_type = estrdup(type);
 315
 316         TAILQ_INSERT_TAIL(&d->d_part, p, p_entries);
 317 }
 318
 319
 320 static int
 321 startdisk(struct diskentry *d, int (*checkit)(const char *, const char *,
 322     const char *, const char *, pid_t *))
 323 {
 324         struct partentry *p = TAILQ_FIRST(&d->d_part);
 325         int rv;
 326
 327         while ((rv = (*checkit)(p->p_type, p->p_devname, p->p_mntpt,
 328             NULL, &d->d_pid)) != 0 && nrun > 0)
 329                 sleep(10);
 330
 331         if (rv == 0)
 332                 nrun++;
 333
 334         return rv;
 335 }