sbin/fsck/preen.c

   1 /*
   2  * Copyright (c) 1990, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. 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  * @(#)preen.c  8.5 (Berkeley) 4/28/95
  34  * $FreeBSD: src/sbin/fsck/preen.c,v 1.16 1999/12/30 16:32:40 peter Exp $
  35  */
  36
  37 #include <sys/param.h>
  38 #include <sys/stat.h>
  39 #include <sys/wait.h>
  40
  41 #include <vfs/ufs/dinode.h>
  42
  43 #include <ctype.h>
  44 #include <errno.h>
  45 #include <fstab.h>
  46 #include <string.h>
  47
  48 #include "fsck.h"
  49
  50 struct part {
  51         struct  part *next;             /* forward link of partitions on disk */
  52         char    *name;                  /* device name */
  53         char    *fsname;                /* mounted filesystem name */
  54         long    auxdata;                /* auxillary data for application */
  55 } *badlist, **badnext = &badlist;
  56
  57 struct disk {
  58         char    *name;                  /* disk base name */
  59         struct  disk *next;             /* forward link for list of disks */
  60         struct  part *part;             /* head of list of partitions on disk */
  61         int     pid;                    /* If != 0, pid of proc working on */
  62 } *disks;
  63
  64 int     nrun, ndisks;
  65
  66 static void addpart(char *name, char *fsname, long auxdata);
  67 static struct disk *finddisk(char *name);
  68 static int startdisk(struct disk *dk,
  69                 int (*checkit)(char *, char *, long, int));
  70
  71 int
  72 checkfstab(int do_preen, int maxrun, int (*docheck)(struct fstab *),
  73            int (*chkit)(char *, char *, long, int))
  74 {
  75         struct fstab *fsp;
  76         struct disk *dk, *nextdisk;
  77         struct part *pt;
  78         int ret, pid, retcode, passno, sumstatus, status;
  79         long auxdata;
  80         char *name;
  81
  82         sumstatus = 0;
  83         for (passno = 1; passno <= 2; passno++) {
  84                 if (setfsent() == 0) {
  85                         fprintf(stderr, "Can't open checklist file: %s\n",
  86                             _PATH_FSTAB);
  87                         return (8);
  88                 }
  89                 while ((fsp = getfsent()) != NULL) {
  90                         if ((auxdata = (*docheck)(fsp)) == 0)
  91                                 continue;
  92                         if (do_preen == 0 ||
  93                             (passno == 1 && fsp->fs_passno == 1)) {
  94                                 if ((name = blockcheck(fsp->fs_spec)) != NULL) {
  95                                         if ((sumstatus = (*chkit)(name,
  96                                             fsp->fs_file, auxdata, 0)) != 0)
  97                                                 return (sumstatus);
  98                                 } else if (do_preen)
  99                                         return (8);
 100                         } else if (passno == 2 && fsp->fs_passno > 1) {
 101                                 if ((name = blockcheck(fsp->fs_spec)) == NULL) {
 102                                         fprintf(stderr, "BAD DISK NAME %s\n",
 103                                                 fsp->fs_spec);
 104                                         sumstatus |= 8;
 105                                         continue;
 106                                 }
 107                                 addpart(name, fsp->fs_file, auxdata);
 108                         }
 109                 }
 110                 if (do_preen == 0)
 111                         return (0);
 112         }
 113         if (do_preen) {
 114                 if (maxrun == 0)
 115                         maxrun = ndisks;
 116                 if (maxrun > ndisks)
 117                         maxrun = ndisks;
 118                 nextdisk = disks;
 119                 for (passno = 0; passno < maxrun; ++passno) {
 120                         while ((ret = startdisk(nextdisk, chkit)) && nrun > 0)
 121                                 sleep(10);
 122                         if (ret)
 123                                 return (ret);
 124                         nextdisk = nextdisk->next;
 125                 }
 126                 while ((pid = wait(&status)) != -1) {
 127                         for (dk = disks; dk; dk = dk->next)
 128                                 if (dk->pid == pid)
 129                                         break;
 130                         if (dk == NULL) {
 131                                 printf("Unknown pid %d\n", pid);
 132                                 continue;
 133                         }
 134                         if (WIFEXITED(status))
 135                                 retcode = WEXITSTATUS(status);
 136                         else
 137                                 retcode = 0;
 138                         if (WIFSIGNALED(status)) {
 139                                 printf("%s (%s): EXITED WITH SIGNAL %d\n",
 140                                         dk->part->name, dk->part->fsname,
 141                                         WTERMSIG(status));
 142                                 retcode = 8;
 143                         }
 144                         if (retcode != 0) {
 145                                 sumstatus |= retcode;
 146                                 *badnext = dk->part;
 147                                 badnext = &dk->part->next;
 148                                 dk->part = dk->part->next;
 149                                 *badnext = NULL;
 150                         } else
 151                                 dk->part = dk->part->next;
 152                         dk->pid = 0;
 153                         nrun--;
 154                         if (dk->part == NULL)
 155                                 ndisks--;
 156
 157                         if (nextdisk == NULL) {
 158                                 if (dk->part) {
 159                                         while ((ret = startdisk(dk, chkit)) &&
 160                                             nrun > 0)
 161                                                 sleep(10);
 162                                         if (ret)
 163                                                 return (ret);
 164                                 }
 165                         } else if (nrun < maxrun && nrun < ndisks) {
 166                                 for ( ;; ) {
 167                                         if ((nextdisk = nextdisk->next) == NULL)
 168                                                 nextdisk = disks;
 169                                         if (nextdisk->part != NULL &&
 170                                             nextdisk->pid == 0)
 171                                                 break;
 172                                 }
 173                                 while ((ret = startdisk(nextdisk, chkit)) &&
 174                                     nrun > 0)
 175                                         sleep(10);
 176                                 if (ret)
 177                                         return (ret);
 178                         }
 179                 }
 180         }
 181         if (sumstatus) {
 182                 if (badlist == NULL)
 183                         return (sumstatus);
 184                 fprintf(stderr, "THE FOLLOWING FILE SYSTEM%s HAD AN %s\n\t",
 185                         badlist->next ? "S" : "", "UNEXPECTED INCONSISTENCY:");
 186                 for (pt = badlist; pt; pt = pt->next)
 187                         fprintf(stderr, "%s (%s)%s", pt->name, pt->fsname,
 188                             pt->next ? ", " : "\n");
 189                 return (sumstatus);
 190         }
 191         endfsent();
 192         return (0);
 193 }
 194
 195 static struct disk *
 196 finddisk(char *name)
 197 {
 198         struct disk *dk, **dkp;
 199         char *p;
 200         size_t len;
 201
 202         p = strrchr(name, '/');
 203         p = p == NULL ? name : p + 1;
 204         while (*p != '\0' && !isdigit((u_char)*p))
 205                 p++;
 206         while (isdigit((u_char)*p))
 207                 p++;
 208         len = (size_t)(p - name);
 209         for (dk = disks, dkp = &disks; dk; dkp = &dk->next, dk = dk->next) {
 210                 if (strncmp(dk->name, name, len) == 0 &&
 211                     dk->name[len] == 0)
 212                         return (dk);
 213         }
 214         if ((*dkp = (struct disk *)malloc(sizeof(struct disk))) == NULL) {
 215                 fprintf(stderr, "out of memory");
 216                 exit (8);
 217         }
 218         dk = *dkp;
 219         if ((dk->name = malloc(len + 1)) == NULL) {
 220                 fprintf(stderr, "out of memory");
 221                 exit (8);
 222         }
 223         strncpy(dk->name, name, len);
 224         dk->name[len] = '\0';
 225         dk->part = NULL;
 226         dk->next = NULL;
 227         dk->pid = 0;
 228         ndisks++;
 229         return (dk);
 230 }
 231
 232 static void
 233 addpart(char *name, char *fsname, long auxdata)
 234 {
 235         struct disk *dk = finddisk(name);
 236         struct part *pt, **ppt = &dk->part;
 237
 238         for (pt = dk->part; pt; ppt = &pt->next, pt = pt->next)
 239                 if (strcmp(pt->name, name) == 0) {
 240                         printf("%s in fstab more than once!\n", name);
 241                         return;
 242                 }
 243         if ((*ppt = (struct part *)malloc(sizeof(struct part))) == NULL) {
 244                 fprintf(stderr, "out of memory");
 245                 exit (8);
 246         }
 247         pt = *ppt;
 248         if ((pt->name = malloc(strlen(name) + 1)) == NULL) {
 249                 fprintf(stderr, "out of memory");
 250                 exit (8);
 251         }
 252         strcpy(pt->name, name);
 253         if ((pt->fsname = malloc(strlen(fsname) + 1)) == NULL) {
 254                 fprintf(stderr, "out of memory");
 255                 exit (8);
 256         }
 257         strcpy(pt->fsname, fsname);
 258         pt->next = NULL;
 259         pt->auxdata = auxdata;
 260 }
 261
 262 static int
 263 startdisk(struct disk *dk, int (*checkit)(char *, char *, long ,int))
 264 {
 265         struct part *pt = dk->part;
 266
 267         dk->pid = fork();
 268         if (dk->pid < 0) {
 269                 perror("fork");
 270                 return (8);
 271         }
 272         if (dk->pid == 0)
 273                 exit((*checkit)(pt->name, pt->fsname, pt->auxdata, 1));
 274         nrun++;
 275         return (0);
 276 }
 277
 278 char *
 279 blockcheck(char *origname)
 280 {
 281         struct stat stblock;
 282         char *newname;
 283         struct fstab *fsinfo;
 284         int retried = 0, len;
 285
 286         newname = origname;
 287 retry:
 288         if (stat(newname, &stblock) < 0) {
 289                 newname = getdevpath(newname, 0);
 290                 if (stat(newname, &stblock) < 0) {
 291                         printf("Can't stat %s: %s\n", newname, strerror(errno));
 292                         return (origname);
 293                 }
 294         }
 295         switch(stblock.st_mode & S_IFMT) {
 296         case S_IFCHR:
 297         case S_IFBLK:
 298                 return(newname);
 299         case S_IFREG:
 300                 return(newname);
 301         case S_IFDIR:
 302                 if (retried)
 303                         break;
 304
 305                 len = strlen(origname) - 1;
 306                 if (len > 0 && origname[len] == '/')
 307                         /* remove trailing slash */
 308                         origname[len] = '\0';
 309                 if ((fsinfo = getfsfile(origname)) == NULL) {
 310                         printf("Can't resolve %s to character special device",
 311                             origname);
 312                         return (0);
 313                 }
 314                 newname = fsinfo->fs_spec;
 315                 retried++;
 316                 goto retry;
 317         }
 318         /*
 319          * Not a block or character device, just return name and
 320          * let the user decide whether to use it.
 321          */
 322         return (origname);
 323 }