sbin/fsck_msdosfs/check.c

   1 /*-
   2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
   3  *
   4  * Copyright (C) 1995, 1996, 1997 Wolfgang Solfrank
   5  * Copyright (c) 1995 Martin Husemann
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
  17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  19  * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  21  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  22  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  23  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  24  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  25  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  26  */
  27
  28 #include <stdlib.h>
  29 #include <string.h>
  30 #include <stdio.h>
  31 #include <unistd.h>
  32 #include <fcntl.h>
  33 #include <libutil.h>
  34
  35 #include "ext.h"
  36 #include "fsutil.h"
  37
  38 int
  39 checkfilesys(const char *fname)
  40 {
  41         int dosfs;
  42         struct bootblock boot;
  43         struct fat_descriptor *fat = NULL;
  44         int finish_dosdirsection=0;
  45         int mod = 0;
  46         int ret = 8;
  47         int64_t freebytes;
  48         int64_t badbytes;
  49
  50         rdonly = alwaysno;
  51         if (!preen)
  52                 printf("** %s", fname);
  53
  54         dosfs = open(fname, rdonly ? O_RDONLY : O_RDWR, 0);
  55         if (dosfs < 0 && !rdonly) {
  56                 dosfs = open(fname, O_RDONLY, 0);
  57                 if (dosfs >= 0)
  58                         pwarn(" (NO WRITE)\n");
  59                 else if (!preen)
  60                         printf("\n");
  61                 rdonly = 1;
  62         } else if (!preen)
  63                 printf("\n");
  64
  65         if (dosfs < 0) {
  66                 perr("Can't open `%s'", fname);
  67                 printf("\n");
  68                 return 8;
  69         }
  70
  71         if (readboot(dosfs, &boot) == FSFATAL) {
  72                 close(dosfs);
  73                 printf("\n");
  74                 return 8;
  75         }
  76
  77         if (!preen)  {
  78                 printf("** Phase 1 - Read FAT and checking connectivity\n");
  79         }
  80
  81         mod |= readfat(dosfs, &boot, &fat);
  82         if (mod & FSFATAL) {
  83                 close(dosfs);
  84                 return 8;
  85         }
  86
  87         if (!preen)
  88                 printf("** Phase 2 - Checking Directories\n");
  89
  90         mod |= resetDosDirSection(fat);
  91         finish_dosdirsection = 1;
  92         if (mod & FSFATAL)
  93                 goto out;
  94         /* delay writing FATs */
  95
  96         mod |= handleDirTree(fat);
  97         if (mod & FSFATAL)
  98                 goto out;
  99
 100         if (!preen)
 101                 printf("** Phase 3 - Checking for Lost Files\n");
 102
 103         mod |= checklost(fat);
 104         if (mod & FSFATAL)
 105                 goto out;
 106
 107         /* now write the FATs */
 108         if (mod & FSFATMOD) {
 109                 if (ask(1, "Update FATs")) {
 110                         mod |= writefat(fat);
 111                         if (mod & FSFATAL)
 112                                 goto out;
 113                 } else
 114                         mod |= FSERROR;
 115         }
 116
 117         freebytes = (int64_t)boot.NumFree * boot.ClusterSize;
 118         badbytes = (int64_t)boot.NumBad * boot.ClusterSize;
 119
 120 #if 1
 121         char freestr[7], badstr[7];
 122
 123         humanize_number(freestr, sizeof(freestr), freebytes, "",
 124             HN_AUTOSCALE, HN_DECIMAL | HN_IEC_PREFIXES);
 125         if (boot.NumBad) {
 126                 humanize_number(badstr, sizeof(badstr), badbytes, "",
 127                     HN_AUTOSCALE, HN_B | HN_DECIMAL | HN_IEC_PREFIXES);
 128
 129                 pwarn("%d files, %sB free (%d clusters), %sB bad (%d clusters)\n",
 130                       boot.NumFiles, freestr, boot.NumFree,
 131                       badstr, boot.NumBad);
 132         } else {
 133                 pwarn("%d files, %sB free (%d clusters)\n",
 134                       boot.NumFiles, freestr, boot.NumFree);
 135         }
 136 #else
 137         if (boot.NumBad)
 138                 pwarn("%d files, %jd KiB free (%d clusters), %jd KiB bad (%d clusters)\n",
 139                       boot.NumFiles, (intmax_t)freebytes / 1024, boot.NumFree,
 140                       (intmax_t)badbytes / 1024, boot.NumBad);
 141         else
 142                 pwarn("%d files, %jd KiB free (%d clusters)\n",
 143                       boot.NumFiles, (intmax_t)freebytes / 1024, boot.NumFree);
 144 #endif
 145
 146         if (mod && (mod & FSERROR) == 0) {
 147                 if (mod & FSDIRTY) {
 148                         if (ask(1, "MARK FILE SYSTEM CLEAN") == 0)
 149                                 mod &= ~FSDIRTY;
 150
 151                         if (mod & FSDIRTY) {
 152                                 pwarn("MARKING FILE SYSTEM CLEAN\n");
 153                                 mod |= cleardirty(fat);
 154                         } else {
 155                                 pwarn("\n***** FILE SYSTEM IS LEFT MARKED AS DIRTY *****\n");
 156                                 mod |= FSERROR; /* file system not clean */
 157                         }
 158                 }
 159         }
 160
 161         if (mod & (FSFATAL | FSERROR))
 162                 goto out;
 163
 164         ret = 0;
 165
 166 out:
 167         if (finish_dosdirsection)
 168                 finishDosDirSection();
 169         free(fat);
 170         close(dosfs);
 171
 172         if (mod & (FSFATMOD|FSDIRMOD))
 173                 pwarn("\n***** FILE SYSTEM WAS MODIFIED *****\n");
 174
 175         return ret;
 176 }