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  * 4. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  * @(#)preen.c  8.5 (Berkeley) 4/28/95
  30  * $FreeBSD: src/sbin/fsck/preen.c,v 1.16 1999/12/30 16:32:40 peter Exp $
  31  */
  32
  33 #include <sys/param.h>
  34 #include <sys/stat.h>
  35 #include <sys/wait.h>
  36
  37 #include <vfs/ufs/dinode.h>
  38
  39 #include <ctype.h>
  40 #include <errno.h>
  41 #include <fstab.h>
  42 #include <string.h>
  43
  44 #include "fsck.h"
  45
  46 struct part {
  47         struct  part *next;             /* forward link of partitions on disk */
  48         char    *name;                  /* device name */
  49         char    *fsname;                /* mounted filesystem name */
  50         long    auxdata;                /* auxillary data for application */
  51 } *badlist, **badnext = &badlist;
  52
  53 struct disk {
  54         char    *name;                  /* disk base name */
  55         struct  disk *next;             /* forward link for list of disks */
  56         struct  part *part;             /* head of list of partitions on disk */
  57         int     pid;                    /* If != 0, pid of proc working on */
  58 } *disks;
  59
  60 int     nrun, ndisks;
  61
  62 static void addpart(char *name, char *fsname, long auxdata);
  63 static struct disk *finddisk(char *name);
  64 static int startdisk(struct disk *dk,
  65                 int (*checkit)(char *, char *, long, int));
  66
  67 int
  68 checkfstab(int do_preen, int maxrun, int (*docheck)(struct fstab *),
  69            int (*chkit)(char *, char *, long, int))
  70 {
  71         struct fstab *fsp;
  72         struct disk *dk, *nextdisk;
  73         struct part *pt;
  74         int ret, pid, retcode, passno, sumstatus, status;
  75         long auxdata;
  76         char *name;
  77
  78         sumstatus = 0;
  79         for (passno = 1; passno <= 2; passno++) {
  80                 if (setfsent() == 0) {
  81                         fprintf(stderr, "Can't open checklist file: %s\n",
  82                             _PATH_FSTAB);
  83                         return (8);
  84                 }
  85                 while ((fsp = getfsent()) != NULL) {
  86                         if ((auxdata = (*docheck)(fsp)) == 0)
  87                                 continue;
  88                         if (do_preen == 0 ||
  89                             (passno == 1 && fsp->fs_passno == 1)) {
  90                                 if ((name = blockcheck(fsp->fs_spec)) != NULL) {
  91                                         if ((sumstatus = (*chkit)(name,
  92                                             fsp->fs_file, auxdata, 0)) != 0)
  93                                                 return (sumstatus);
  94                                 } else if (do_preen)
  95                                         return (8);
  96                         } else if (passno == 2 && fsp->fs_passno > 1) {
  97                                 if ((name = blockcheck(fsp->fs_spec)) == NULL) {
  98                                         fprintf(stderr, "BAD DISK NAME %s\n",
  99                                                 fsp->fs_spec);
 100                                         sumstatus |= 8;
 101                                         continue;
 102                                 }
 103                                 addpart(name, fsp->fs_file, auxdata);
 104                         }
 105                 }
 106                 if (do_preen == 0)
 107                         return (0);
 108         }
 109         if (do_preen) {
 110                 if (maxrun == 0)
 111                         maxrun = ndisks;
 112                 if (maxrun > ndisks)
 113                         maxrun = ndisks;
 114                 nextdisk = disks;
 115                 for (passno = 0; passno < maxrun; ++passno) {
 116                         while ((ret = startdisk(nextdisk, chkit)) && nrun > 0)
 117                                 sleep(10);
 118                         if (ret)
 119                                 return (ret);
 120                         nextdisk = nextdisk->next;
 121                 }
 122                 while ((pid = wait(&status)) != -1) {
 123                         for (dk = disks; dk; dk = dk->next)
 124                                 if (dk->pid == pid)
 125                                         break;
 126                         if (dk == NULL) {
 127                                 printf("Unknown pid %d\n", pid);
 128                                 continue;
 129                         }
 130                         if (WIFEXITED(status))
 131                                 retcode = WEXITSTATUS(status);
 132                         else
 133                                 retcode = 0;
 134                         if (WIFSIGNALED(status)) {
 135                                 printf("%s (%s): EXITED WITH SIGNAL %d\n",
 136                                         dk->part->name, dk->part->fsname,
 137                                         WTERMSIG(status));
 138                                 retcode = 8;
 139                         }
 140                         if (retcode != 0) {
 141                                 sumstatus |= retcode;
 142                                 *badnext = dk->part;
 143                                 badnext = &dk->part->next;
 144                                 dk->part = dk->part->next;
 145                                 *badnext = NULL;
 146                         } else
 147                                 dk->part = dk->part->next;
 148                         dk->pid = 0;
 149                         nrun--;
 150                         if (dk->part == NULL)
 151                                 ndisks--;
 152
 153                         if (nextdisk == NULL) {
 154                                 if (dk->part) {
 155                                         while ((ret = startdisk(dk, chkit)) &&
 156                                             nrun > 0)
 157                                                 sleep(10);
 158                                         if (ret)
 159                                                 return (ret);
 160                                 }
 161                         } else if (nrun < maxrun && nrun < ndisks) {
 162                                 for ( ;; ) {
 163                                         if ((nextdisk = nextdisk->next) == NULL)
 164                                                 nextdisk = disks;
 165                                         if (nextdisk->part != NULL &&
 166                                             nextdisk->pid == 0)
 167                                                 break;
 168                                 }
 169                                 while ((ret = startdisk(nextdisk, chkit)) &&
 170                                     nrun > 0)
 171                                         sleep(10);
 172                                 if (ret)
 173                                         return (ret);
 174                         }
 175                 }
 176         }
 177         if (sumstatus) {
 178                 if (badlist == NULL)
 179                         return (sumstatus);
 180                 fprintf(stderr, "THE FOLLOWING FILE SYSTEM%s HAD AN %s\n\t",
 181                         badlist->next ? "S" : "", "UNEXPECTED INCONSISTENCY:");
 182                 for (pt = badlist; pt; pt = pt->next)
 183                         fprintf(stderr, "%s (%s)%s", pt->name, pt->fsname,
 184                             pt->next ? ", " : "\n");
 185                 return (sumstatus);
 186         }
 187         endfsent();
 188         return (0);
 189 }
 190
 191 static struct disk *
 192 finddisk(char *name)
 193 {
 194         struct disk *dk, **dkp;
 195         char *p;
 196         size_t len;
 197
 198         p = strrchr(name, '/');
 199         p = p == NULL ? name : p + 1;
 200         while (*p != '\0' && !isdigit((u_char)*p))
 201                 p++;
 202         while (isdigit((u_char)*p))
 203                 p++;
 204         len = (size_t)(p - name);
 205         for (dk = disks, dkp = &disks; dk; dkp = &dk->next, dk = dk->next) {
 206                 if (strncmp(dk->name, name, len) == 0 &&
 207                     dk->name[len] == 0)
 208                         return (dk);
 209         }
 210         if ((*dkp = (struct disk *)malloc(sizeof(struct disk))) == NULL) {
 211                 fprintf(stderr, "out of memory");
 212                 exit (8);
 213         }
 214         dk = *dkp;
 215         if ((dk->name = malloc(len + 1)) == NULL) {
 216                 fprintf(stderr, "out of memory");
 217                 exit (8);
 218         }
 219         strncpy(dk->name, name, len);
 220         dk->name[len] = '\0';
 221         dk->part = NULL;
 222         dk->next = NULL;
 223         dk->pid = 0;
 224         ndisks++;
 225         return (dk);
 226 }
 227
 228 static void
 229 addpart(char *name, char *fsname, long auxdata)
 230 {
 231         struct disk *dk = finddisk(name);
 232         struct part *pt, **ppt = &dk->part;
 233
 234         for (pt = dk->part; pt; ppt = &pt->next, pt = pt->next)
 235                 if (strcmp(pt->name, name) == 0) {
 236                         printf("%s in fstab more than once!\n", name);
 237                         return;
 238                 }
 239         if ((*ppt = (struct part *)malloc(sizeof(struct part))) == NULL) {
 240                 fprintf(stderr, "out of memory");
 241                 exit (8);
 242         }
 243         pt = *ppt;
 244         if ((pt->name = malloc(strlen(name) + 1)) == NULL) {
 245                 fprintf(stderr, "out of memory");
 246                 exit (8);
 247         }
 248         strcpy(pt->name, name);
 249         if ((pt->fsname = malloc(strlen(fsname) + 1)) == NULL) {
 250                 fprintf(stderr, "out of memory");
 251                 exit (8);
 252         }
 253         strcpy(pt->fsname, fsname);
 254         pt->next = NULL;
 255         pt->auxdata = auxdata;
 256 }
 257
 258 static int
 259 startdisk(struct disk *dk, int (*checkit)(char *, char *, long ,int))
 260 {
 261         struct part *pt = dk->part;
 262
 263         dk->pid = fork();
 264         if (dk->pid < 0) {
 265                 perror("fork");
 266                 return (8);
 267         }
 268         if (dk->pid == 0)
 269                 exit((*checkit)(pt->name, pt->fsname, pt->auxdata, 1));
 270         nrun++;
 271         return (0);
 272 }
 273
 274 char *
 275 blockcheck(char *origname)
 276 {
 277         struct stat stblock;
 278         char *newname;
 279         struct fstab *fsinfo;
 280         int retried = 0, len;
 281
 282         newname = origname;
 283 retry:
 284         if (stat(newname, &stblock) < 0) {
 285                 newname = getdevpath(newname, 0);
 286                 if (stat(newname, &stblock) < 0) {
 287                         printf("Can't stat %s: %s\n", newname, strerror(errno));
 288                         return (origname);
 289                 }
 290         }
 291         switch(stblock.st_mode & S_IFMT) {
 292         case S_IFCHR:
 293         case S_IFBLK:
 294                 return(newname);
 295         case S_IFREG:
 296                 return(newname);
 297         case S_IFDIR:
 298                 if (retried)
 299                         break;
 300
 301                 len = strlen(origname) - 1;
 302                 if (len > 0 && origname[len] == '/')
 303                         /* remove trailing slash */
 304                         origname[len] = '\0';
 305                 if ((fsinfo = getfsfile(origname)) == NULL) {
 306                         printf("Can't resolve %s to character special device",
 307                             origname);
 308                         return (0);
 309                 }
 310                 newname = fsinfo->fs_spec;
 311                 retried++;
 312                 goto retry;
 313         }
 314         /*
 315          * Not a block or character device, just return name and
 316          * let the user decide whether to use it.
 317          */
 318         return (origname);
 319 }