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dir.c
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/*
* Copyright (C) 1995, 1996, 1997 Wolfgang Solfrank
* Copyright (c) 1995 Martin Husemann
* Some structure declaration borrowed from Paul Popelka
* ([email protected]), see /sys/msdosfs/ for reference.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Martin Husemann
* and Wolfgang Solfrank.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
#include "fatcache.h"
#include "fragment.h"
#ifndef lint
__RCSID("$NetBSD: dir.c,v 1.14 1998/08/25 19:18:15 ross Exp $");
static const char rcsid[] =
"$FreeBSD: src/sbin/fsck_msdosfs/dir.c,v 1.3 2003/12/26 17:24:37 trhodes Exp $";
#endif /* not lint */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <stdio.h>
#include <unistd.h>
#include <time.h>
#include <sys/param.h>
#include "ext.h"
#include "fsutil.h"
#include "dosfs.h"
#define SLOT_EMPTY 0x00 /* slot has never been used */
#define SLOT_E5 0x05 /* the real value is 0xe5 */
#define SLOT_DELETED 0xe5 /* file in this slot deleted */
#define ATTR_NORMAL 0x00 /* normal file */
#define ATTR_READONLY 0x01 /* file is readonly */
#define ATTR_HIDDEN 0x02 /* file is hidden */
#define ATTR_SYSTEM 0x04 /* file is a system file */
#define ATTR_VOLUME 0x08 /* entry is a volume label */
#define ATTR_DIRECTORY 0x10 /* entry is a directory name */
#define ATTR_ARCHIVE 0x20 /* file is new or modified */
#define ATTR_WIN95 0x0f /* long name record */
/*
* This is the format of the contents of the deTime field in the direntry
* structure.
* We don't use bitfields because we don't know how compilers for
* arbitrary machines will lay them out.
*/
#define DT_2SECONDS_MASK 0x1F /* seconds divided by 2 */
#define DT_2SECONDS_SHIFT 0
#define DT_MINUTES_MASK 0x7E0 /* minutes */
#define DT_MINUTES_SHIFT 5
#define DT_HOURS_MASK 0xF800 /* hours */
#define DT_HOURS_SHIFT 11
/*
* This is the format of the contents of the deDate field in the direntry
* structure.
*/
#define DD_DAY_MASK 0x1F /* day of month */
#define DD_DAY_SHIFT 0
#define DD_MONTH_MASK 0x1E0 /* month */
#define DD_MONTH_SHIFT 5
#define DD_YEAR_MASK 0xFE00 /* year - 1980 */
#define DD_YEAR_SHIFT 9
/* dir.c */
static struct dosDirEntry *newDosDirEntry(void);
static void freeDosDirEntry(struct dosDirEntry *);
static struct dirTodoNode *newDirTodo(void);
static void freeDirTodo(struct dirTodoNode *);
static char *fullpath(struct dosDirEntry *);
static u_char calcShortSum(u_char *);
static int delete(int, struct bootblock *,struct cluster_chain_descriptor* ,cl_t, int,
cl_t, int, int);
static int removede(int, struct bootblock *, struct cluster_chain_descriptor*,u_char *,
u_char *, cl_t, cl_t, cl_t, char *, int);
static int checksize(struct bootblock *, u_char *,
struct dosDirEntry *);
static int readDosDirSection(int, struct bootblock *,
struct dosDirEntry *);
/*
* Manage free dosDirEntry structures.
*/
static struct dosDirEntry *freede;
static struct dosDirEntry *
newDosDirEntry(void)
{
struct dosDirEntry *de;
if (!(de = freede)) {
if (!(de = (struct dosDirEntry *)malloc(sizeof *de)))
return 0;
} else
freede = de->next;
return de;
}
static void
freeDosDirEntry(struct dosDirEntry *de)
{
de->next = freede;
freede = de;
}
/*
* The same for dirTodoNode structures.
*/
static struct dirTodoNode *freedt;
static struct dirTodoNode *
newDirTodo(void)
{
struct dirTodoNode *dt;
if (!(dt = freedt)) {
if (!(dt = (struct dirTodoNode *)malloc(sizeof *dt)))
return 0;
} else
freedt = dt->next;
return dt;
}
static void
freeDirTodo(struct dirTodoNode *dt)
{
dt->next = freedt;
freedt = dt;
}
/*
* The stack of unread directories
*/
struct dirTodoNode *pendingDirectories = NULL;
/*
* Return the full pathname for a directory entry.
*/
static char *
fullpath(struct dosDirEntry *dir)
{
static char namebuf[MAXPATHLEN + 1];
char *cp, *np;
int nl;
cp = namebuf + sizeof namebuf - 1;
*cp = '\0';
do {
np = dir->lname[0] ? dir->lname : dir->name;
nl = strlen(np);
if ((cp -= nl) <= namebuf + 1)
break;
memcpy(cp, np, nl);
*--cp = '/';
} while ((dir = dir->parent) != NULL);
if (dir)
*--cp = '?';
else
cp++;
return cp;
}
/*
* Calculate a checksum over an 8.3 alias name
*/
static u_char
calcShortSum(u_char *p)
{
u_char sum = 0;
int i;
for (i = 0; i < 11; i++) {
sum = (sum << 7)|(sum >> 1); /* rotate right */
sum += p[i];
}
return sum;
}
/*
* Global variables temporarily used during a directory scan
*/
static char longName[DOSLONGNAMELEN] = "";
static u_char *buffer = NULL;
static u_char *delbuf = NULL;
struct dosDirEntry *rootDir;
static struct dosDirEntry *lostDir;
/*
* Init internal state for a new directory scan.
*/
int
resetDosDirSection(struct bootblock *boot)
{
int b1, b2;
int ret = FSOK;
struct cluster_chain_descriptor *fat,tofind,*insert;
struct fragment *frag,tofind_frag;
struct fatcache *cache;
b1 = boot->RootDirEnts * 32;
b2 = boot->SecPerClust * boot->BytesPerSec;
if (!(buffer = malloc(b1 > b2 ? b1 : b2))
|| !(delbuf = malloc(b2))
|| !(rootDir = newDosDirEntry())) {
perror("No space for directory");
return FSFATAL;
}
memset(rootDir, 0, sizeof *rootDir);
if (boot->flags & FAT32) {
if (boot->RootCl < CLUST_FIRST || boot->RootCl >= boot->NumClusters) {
pfatal("Root directory starts with cluster out of range(%u)",
boot->RootCl);
return FSFATAL;
}
//In fat12 and fat16, the boot->RootCl is zero,you can not find its chain
tofind.head = boot->RootCl;
fat = RB_FIND(FSCK_MSDOS_CACHE,&rb_root,&tofind);
/*we have check the cluster chain in readfatAndcheckfat*/
if(!fat){
pwarn("can not find Root direntory in cluster chain\n");
if(ask(1, "Fix")){
tofind_frag.head = boot->RootCl;
frag = RB_FIND(FSCK_MSDOS_FRAGMENT,&rb_free_root,&tofind_frag);
if(!frag){
fsck_err("can not find Root direntory in free chain\n");
ret = FSFATAL;
goto out;
}
/*find it in free rb tree,now move it to cluster chain*/
fat = New_fatentry();
if(!fat)
return FSFATAL;
fat->head = boot->RootCl;
fat->head = 1;
cache = New_fatcache();
if(!cache)
return FSFATAL;
cache->head = boot->RootCl;
cache->length = 1;
add_fatcache_To_ClusterChain(fat,cache);
insert = RB_INSERT(FSCK_MSDOS_CACHE,&rb_root,fat);
if(insert){
fsck_err("%s:fatentry(head:0x%x) exist\n",__func__,fat->head);
return FSFATAL;
}
RB_REMOVE(FSCK_MSDOS_FRAGMENT,&rb_free_root,frag);
free(frag);
ret = FSFATMOD;
goto out;
}else{
ret = FSFATAL;
goto out;
}
}
fat->flag |= FAT_USED;
rootDir->head = boot->RootCl;
}
out:
return ret;
}
/*
* Cleanup after a directory scan
*/
void
finishDosDirSection(void)
{
struct dirTodoNode *p, *np;
struct dosDirEntry *d, *nd;
for (p = pendingDirectories; p; p = np) {
np = p->next;
freeDirTodo(p);
}
pendingDirectories = 0;
for (d = rootDir; d; d = nd) {
if ((nd = d->child) != NULL) {
d->child = 0;
continue;
}
if (!(nd = d->next))
nd = d->parent;
freeDosDirEntry(d);
}
rootDir = lostDir = NULL;
free(buffer);
free(delbuf);
buffer = NULL;
delbuf = NULL;
}
/*
* Delete directory entries between startcl, startoff and endcl, endoff.
*/
static int
delete(int f, struct bootblock *boot, struct cluster_chain_descriptor *fat,cl_t startcl,
int startoff, cl_t endcl, int endoff, int notlast)
{
u_char *s, *e;
loff_t off;
int clsz = boot->SecPerClust * boot->BytesPerSec;
struct fatcache *cache;
fsck_debug("delete: %u:%u -->> %u:%u\n",startcl,startoff,endcl,endoff);
s = delbuf + startoff;
e = delbuf + clsz;
if(!fat){
pwarn("Can't find cl %d in cluster chain\n",startcl);
return FSFATAL;
}
while (startcl >= CLUST_FIRST && startcl < boot->NumClusters) {
if (startcl == endcl) {
if (notlast)
break;
e = delbuf + endoff;
}
off = startcl * boot->SecPerClust + boot->ClusterOffset;
off *= boot->BytesPerSec;
if (lseek64(f, off, SEEK_SET) != off) {
perror("Unable to lseek64");
return FSFATAL;
}
if (read(f, delbuf, clsz) != clsz) {
perror("Unable to read directory");
return FSFATAL;
}
while (s < e) {
*s = SLOT_DELETED;
s += 32;
}
if (lseek64(f, off, SEEK_SET) != off) {
perror("Unable to lseek64");
return FSFATAL;
}
if (write(f, delbuf, clsz) != clsz) {
perror("Unable to write directory");
return FSFATAL;
}
if (startcl == endcl)
break;
//if startcl = 0.it means no next cluster
cache = Find_nextclus(fat,startcl,&startcl);
if(!cache && !startcl)
return FSFATAL;
s = delbuf;
}
return FSOK;
}
static int
removede(int f, struct bootblock *boot,struct cluster_chain_descriptor *fat, u_char *start,
u_char *end, cl_t startcl, cl_t endcl, cl_t curcl, char *path, int type)
{
fsck_debug("removede : %u:%p --->> %u:%p \n",startcl,start,endcl,end);
switch (type) {
case 0:
pwarn("Invalid long filename entry for %s\n", path);
break;
case 1:
pwarn("Invalid long filename entry at end of directory %s\n", path);
break;
case 2:
pwarn("Invalid long filename entry for volume label\n");
break;
case 3:
pwarn("Can't find the associated cluster chain\n");
}
if (ask(1, "Remove")) {
if (startcl != curcl) {
if (delete(f, boot, fat,
startcl, start - buffer,
endcl, end - buffer,
endcl == curcl) == FSFATAL)
return FSFATAL;
start = buffer;
}
if (endcl == curcl)
for (; start < end; start += 32)
*start = SLOT_DELETED;
return FSDIRMOD;
}
return FSERROR;
}
/*
* Check an in-memory file entry
*/
static int
checksize(struct bootblock *boot, u_char *p,
struct dosDirEntry *dir)
{
/*
* Check size on ordinary files
*/
struct cluster_chain_descriptor *fat = NULL,tofind;
struct fatcache *cache = NULL;
u_int64_t physicalSize;
const u_int64_t max_physical_size = 0x100000000;
if (dir->head == CLUST_FREE)
physicalSize = 0;
else {
if (dir->head < CLUST_FIRST || dir->head >= boot->NumClusters)
return FSERROR;
tofind.head = dir->head;
fat = RB_FIND(FSCK_MSDOS_CACHE,&rb_root,&tofind);
if(!fat){
pwarn("Can't find the cluster chain with head(%u) \n",dir->head);
return FSERROR;
}
physicalSize = ((u_int64_t)fat->length) * ((u_int64_t)boot->ClusterSize);
}
/*
*The file size means how much useful data the file contains
*FAT use 4 bytes to describe the file size, so the max file size is (4GBytes - 1).
*The physical size means how much space the file use in disk. The max physical
*size is 4GBytes.
*
*For example, we create a new file in WINDOWS,which size is 100Bytes, but i
*use 4KB in disk. Here 100B is file size ,and 4KB is physical size.
*
*Physical size = (file size + boot->ClusterSize - 1) & (boot->ClusterSize - 1)
*/
if (physicalSize > max_physical_size) {
fsck_err("file %s physical size exceed 4 GBytes. %llu\n",
fullpath(dir), physicalSize);
return FSERROR;
}
if (physicalSize < (u_int64_t)dir->size) {
pwarn("size of %s is %u, should at most be %llu\n",
fullpath(dir), dir->size, physicalSize);
fsck_debug("physicalSize:%llu ,dir->size = %d ,dir->head:0x%x\n",physicalSize,dir->size,dir->head);
if (ask(1, "Truncate")) {
dir->size = physicalSize;
p[28] = (u_char)physicalSize;
p[29] = (u_char)(physicalSize >> 8);
p[30] = (u_char)(physicalSize >> 16);
p[31] = (u_char)(physicalSize >> 24);
return FSDIRMOD;
} else
return FSERROR;
} else if (physicalSize - (u_int64_t)dir->size >= (u_int64_t)boot->ClusterSize) {
pwarn("%s has too many clusters allocated\n",
fullpath(dir));
fsck_debug("physicalSize:%llu ,dir->size = %d ,dir->head:0x%x\n",physicalSize,dir->size,dir->head);
if (ask(1, "Drop superfluous clusters")) {
cl_t cl;
u_int32_t sz = 0;
for (cl = dir->head; (sz += boot->ClusterSize) < dir->size;){
cache = Find_nextclus(fat,cl,&cl);
if(!cl )
return FSERROR;
if(cl == CLUST_EOF)
break;
}
if(!cache && !cl)
return FSERROR;
Trunc(boot,fat,cl);
fsck_debug("after truncate ,fat->length = %d \n",fat->length);
return FSFATMOD;
} else
return FSERROR;
}
return FSOK;
}
static u_char dot_header[16]={0x2E, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x10, 0x00, 0x00, 0x00, 0x00};
static u_char dot_dot_header[16]={0x2E, 0x2E, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x10, 0x00, 0x00, 0x00, 0x00};
/*
* Check for missing or broken '.' and '..' entries.
*/
static int
check_dot_dot(int f, struct bootblock *boot,struct dosDirEntry *dir)
{
u_char *p, *buf;
loff_t off;
int last;
cl_t cl;
int rc=0, n_count;
struct cluster_chain_descriptor *fat,tofind;
struct fatcache *cache;
int dot, dotdot;
dot = dotdot = 0;
cl = dir->head;
if (dir->parent && (cl < CLUST_FIRST || cl >= boot->NumClusters)) {
return rc;
}
tofind.head = dir->head;
fat = RB_FIND(FSCK_MSDOS_CACHE,&rb_root,&tofind);
if(!fat){
pwarn("%s:cannot find cluster chain(%d)\n",__func__,dir->head);
return FSFATAL;
}
do {
if (!(boot->flags & FAT32) && !dir->parent) {
last = boot->RootDirEnts * 32;
off = boot->ResSectors + boot->FATs * boot->FATsecs;
} else {
last = boot->SecPerClust * boot->BytesPerSec;
off = cl * boot->SecPerClust + boot->ClusterOffset;
}
off *= boot->BytesPerSec;
buf = malloc(last);
if (!buf) {
perror("Unable to malloc");
return FSFATAL;
}
if (lseek64(f, off, SEEK_SET) != off) {
perror("Unable to lseek64");
return FSFATAL;
}
if (read(f, buf, last) != last) {
perror("Unable to read");
return FSFATAL;
}
last /= 32;
p = buf;
for (n_count=0, rc=0; n_count < 11; n_count++) {
if (dot_header[n_count] != p[n_count]) {
rc=-1;
break;
}
}
if(!rc)
dot=1;
for (n_count = 0, rc = 0; n_count < 11; n_count++) {
if (dot_dot_header[n_count] != p[n_count+32]) {
rc=-1;
break;
}
}
if(!rc)
dotdot=1;
free(buf);
cache = Find_nextclus(fat,cl,&cl);
if(!cache && !cl)
return FSFATAL;
} while (cl >= CLUST_FIRST && cl < boot->NumClusters);
if (!dot || !dotdot) {
if (!dot)
pwarn("%s: '.' absent for %s.\n",__func__,dir->name);
if (!dotdot)
pwarn("%s: '..' absent for %s. \n",__func__,dir->name);
return -1;
}
return 0;
}
/*
* Read a directory and
* - resolve long name records
* - enter file and directory records into the parent's list
* - push directories onto the todo-stack
*/
static int
readDosDirSection(int f, struct bootblock *boot,
struct dosDirEntry *dir)
{
struct dosDirEntry dirent, *d;
u_char *p, *vallfn, *invlfn, *empty;
loff_t off;
int i, j, k, last;
cl_t cl, valcl = ~0, invcl = ~0, empcl = ~0;
char *t;
u_int lidx = 0;
int shortSum;
int mod = FSOK;
struct cluster_chain_descriptor *fat = NULL,tofind;
struct fatcache *cache = NULL;
#define THISMOD 0x8000 /* Only used within this routine */
cl = dir->head;
if (dir->parent && (cl < CLUST_FIRST || cl >= boot->NumClusters)) {
/*
* Already handled somewhere else.
*/
return FSOK;
}
shortSum = -1;
vallfn = invlfn = empty = NULL;
int dot,dotdot;
dot = dotdot = 0;
//FAT32 has boot->Rootcl
if((boot->ClustMask == CLUST32_MASK) || dir->parent){
tofind.head = dir->head;
fat = RB_FIND(FSCK_MSDOS_CACHE,&rb_root,&tofind);
if(!fat){
fsck_err("%s:can not find cluster chain(head = %u)\n",__func__,dir->head);
return FSFATMOD;
}
}
do {
struct cluster_chain_descriptor *c_fat;
if (!(boot->flags & FAT32) && !dir->parent) {
last = boot->RootDirEnts * 32;
off = boot->ResSectors + boot->FATs * boot->FATsecs;
} else {
last = boot->SecPerClust * boot->BytesPerSec;
off = cl * boot->SecPerClust + boot->ClusterOffset;
}
off *= boot->BytesPerSec;
if (lseek64(f, off, SEEK_SET) != off) {
printf("off = %llu\n", off);
perror("Unable to lseek64");
return FSFATAL;
}
if (read(f, buffer, last) != last) {
perror("Unable to read");
return FSFATAL;
}
last /= 32;
for (p = buffer, i = 0; i < last; i++, p += 32) {
if (dir->fsckflags & DIREMPWARN) {
*p = SLOT_EMPTY;
continue;
}
if (*p == SLOT_EMPTY || *p == SLOT_DELETED) {
if (*p == SLOT_EMPTY) {
dir->fsckflags |= DIREMPTY;
empty = p;
empcl = cl;
}
continue;
}
if (dir->fsckflags & DIREMPTY) {
if (!(dir->fsckflags & DIREMPWARN)) {
pwarn("%s has entries after end of directory\n",
fullpath(dir));
if (ask(1, "Extend")) {
u_char *q;
dir->fsckflags &= ~DIREMPTY;
if (delete(f, boot, fat,
empcl, empty - buffer,
cl, p - buffer, 1) == FSFATAL)
return FSFATAL;
q = empcl == cl ? empty : buffer;
for (; q < p; q += 32)
*q = SLOT_DELETED;
mod |= THISMOD|FSDIRMOD;
} else if (ask(1, "Truncate"))
dir->fsckflags |= DIREMPWARN;
}
if (dir->fsckflags & DIREMPWARN) {
*p = SLOT_DELETED;
mod |= THISMOD|FSDIRMOD;
continue;
} else if (dir->fsckflags & DIREMPTY)
mod |= FSERROR;
empty = NULL;
}
if (p[11] == ATTR_WIN95) {
if (*p & LRFIRST) {
if (shortSum != -1) {
if (!invlfn) {
invlfn = vallfn;
invcl = valcl;
}
}
memset(longName, 0, sizeof longName);
shortSum = p[13];
vallfn = p;
valcl = cl;
} else if (shortSum != p[13]
|| lidx != (*p & LRNOMASK)) {
if (!invlfn) {
invlfn = vallfn;
invcl = valcl;
}
if (!invlfn) {
invlfn = p;
invcl = cl;
}
vallfn = NULL;
}
lidx = *p & LRNOMASK;
t = longName + --lidx * 13;
for (k = 1; k < 11 && t < longName + sizeof(longName); k += 2) {
if (!p[k] && !p[k + 1])
break;
*t++ = p[k];
/*
* Warn about those unusable chars in msdosfs here? XXX
*/
if (p[k + 1])
t[-1] = '?';
}
if (k >= 11)
for (k = 14; k < 26 && t < longName + sizeof(longName); k += 2) {
if (!p[k] && !p[k + 1])
break;
*t++ = p[k];
if (p[k + 1])
t[-1] = '?';
}
if (k >= 26)
for (k = 28; k < 32 && t < longName + sizeof(longName); k += 2) {
if (!p[k] && !p[k + 1])
break;
*t++ = p[k];
if (p[k + 1])
t[-1] = '?';
}
if (t >= longName + sizeof(longName)) {
pwarn("long filename too long\n");
if (!invlfn) {
invlfn = vallfn;
invcl = valcl;
}
vallfn = NULL;
}
if (p[26] | (p[27] << 8)) {
pwarn("long filename record cluster start != 0\n");
if (!invlfn) {
invlfn = vallfn;
invcl = cl;
}
vallfn = NULL;
}
continue; /* long records don't carry further
* information */
}
/*
* This is a standard msdosfs directory entry.
*/
memset(&dirent, 0, sizeof dirent);
/*
* it's a short name record, but we need to know
* more, so get the flags first.
*/
dirent.flags = p[11];
/*
* Translate from 850 to ISO here XXX
*/
for (j = 0; j < 8; j++)
dirent.name[j] = p[j];
dirent.name[8] = '\0';
for (k = 7; k >= 0 && dirent.name[k] == ' '; k--)
dirent.name[k] = '\0';
if (dirent.name[k] != '\0')
k++;
if (dirent.name[0] == SLOT_E5)
dirent.name[0] = 0xe5;
if (dirent.flags & ATTR_VOLUME) {
if (vallfn || invlfn) {
mod |= removede(f, boot, fat,
invlfn ? invlfn : vallfn, p,
invlfn ? invcl : valcl, -1, 0,
fullpath(dir), 2);
vallfn = NULL;
invlfn = NULL;
}
continue;
}
if (p[8] != ' ')
dirent.name[k++] = '.';
for (j = 0; j < 3; j++)
dirent.name[k++] = p[j+8];
dirent.name[k] = '\0';
for (k--; k >= 0 && dirent.name[k] == ' '; k--)
dirent.name[k] = '\0';
if (vallfn && shortSum != calcShortSum(p)) {
if (!invlfn) {
invlfn = vallfn;
invcl = valcl;
}
vallfn = NULL;
}
dirent.head = p[26] | (p[27] << 8);
if (boot->ClustMask == CLUST32_MASK)
dirent.head |= (p[20] << 16) | (p[21] << 24);
dirent.size = p[28] | (p[29] << 8) | (p[30] << 16) | (p[31] << 24);
if (vallfn) {
strcpy(dirent.lname, longName);
longName[0] = '\0';
shortSum = -1;
}
dirent.parent = dir;
dirent.next = dir->child;
if (invlfn) {
mod |= k = removede(f, boot, fat,
invlfn, vallfn ? vallfn : p,
invcl, vallfn ? valcl : cl, cl,
fullpath(&dirent), 0);
if (mod & FSFATAL)
return FSFATAL;
if (vallfn
? (valcl == cl && vallfn != buffer)
: p != buffer)
if (k & FSDIRMOD)
mod |= THISMOD;
}
if (dirent.size == 0 && !(dirent.flags & ATTR_DIRECTORY)) {
if (dirent.head != 0) {
pwarn("%s has clusters, but size 0\n",
fullpath(&dirent));
if (ask(1, "Drop allocated clusters")) {
p[26] = p[27] = 0;
if (boot->ClustMask == CLUST32_MASK)
p[20] = p[21] = 0;
tofind.head = dirent.head;
c_fat = RB_FIND(FSCK_MSDOS_CACHE,&rb_root,&tofind);
if(c_fat)
clearchain(boot,c_fat, dirent.head);
else
mod |= FSERROR;
dirent.head = 0;
mod |= THISMOD|FSDIRMOD|FSFATMOD;
} else
mod |= FSERROR;
}
} else if (dirent.head == 0
&& !strcmp(dirent.name, "..")
&& dir->parent /* XXX */
&& !dir->parent->parent) {
/*
* Do nothing, the parent is the root
*/
} else if (dirent.head < CLUST_FIRST
|| dirent.head >= boot->NumClusters
)
{
if (dirent.head == 0)
pwarn("%s has no clusters\n",
fullpath(&dirent));
else if (dirent.head < CLUST_FIRST
|| dirent.head >= boot->NumClusters)
pwarn("%s starts with cluster out of range(%u)\n",
fullpath(&dirent),
dirent.head);
if (dirent.flags & ATTR_DIRECTORY) {
if (ask(1, "Remove")) {
*p = SLOT_DELETED;
mod |= THISMOD|FSDIRMOD;
} else
mod |= FSERROR;
continue;
} else {
if (ask(1, "Truncate")) {
p[28] = p[29] = p[30] = p[31] = 0;
p[26] = p[27] = 0;
if (boot->ClustMask == CLUST32_MASK)
p[20] = p[21] = 0;
dirent.size = 0;
mod |= THISMOD|FSDIRMOD;
} else
mod |= FSERROR;
}
}
if (dirent.head >= CLUST_FIRST && dirent.head < boot->NumClusters){
tofind.head = dirent.head;
c_fat = RB_FIND(FSCK_MSDOS_CACHE,&rb_root,&tofind);
if (c_fat) {
c_fat->flag |= FAT_USED;
}
else{
fsck_warn("can't find cluster chain(head:0x%x) of file:%s \n",dirent.head,fullpath(&dirent));
if (vallfn || invlfn) {
fsck_warn("Invalid long directory\n");
mod |= removede(f, boot, fat,invlfn ? invlfn : vallfn, p,invlfn ? invcl : valcl, -1, 0,fullpath(dir), 3);
} else {
fsck_warn("Invalid short directory\n");
if(ask(1, "Delete")){
*p = SLOT_DELETED;
mod |= THISMOD|FSDIRMOD;
}else
mod |= FSERROR;
}
}
}
vallfn = NULL; /* not used any longer */
invlfn = NULL;
if (dirent.flags & ATTR_DIRECTORY) {
/*
* gather more info for directories
*/
struct dirTodoNode *n;
if (dirent.size) {
pwarn("Directory %s has size != 0\n",
fullpath(&dirent));
if (ask(1, "Correct")) {
p[28] = p[29] = p[30] = p[31] = 0;
dirent.size = 0;
mod |= THISMOD|FSDIRMOD;
} else
mod |= FSERROR;
}
/*
* handle '.' and '..' specially
*/
if (strcmp(dirent.name, ".") == 0) {
if (dirent.head != dir->head) {
pwarn("'.' entry in %s has incorrect start cluster\n",
fullpath(dir));
if (ask(1, "Correct")) {
dirent.head = dir->head;
p[26] = (u_char)dirent.head;
p[27] = (u_char)(dirent.head >> 8);
if (boot->ClustMask == CLUST32_MASK) {
p[20] = (u_char)(dirent.head >> 16);
p[21] = (u_char)(dirent.head >> 24);
}
mod |= THISMOD|FSDIRMOD;
} else
mod |= FSERROR;
}
continue;
} else if (strcmp(dirent.name, "..") == 0) {
if (dir->parent) { /* XXX */
if (!dir->parent->parent) {
if (dirent.head) {
pwarn("'..' entry in %s has non-zero start cluster\n",
fullpath(dir));
if (ask(1, "Correct")) {
dirent.head = 0;
p[26] = p[27] = 0;
if (boot->ClustMask == CLUST32_MASK)
p[20] = p[21] = 0;
mod |= THISMOD|FSDIRMOD;
} else
mod |= FSERROR;
}
} else if (dirent.head != dir->parent->head) {
pwarn("'..' entry in %s has incorrect start cluster\n",
fullpath(dir));
if (ask(1, "Correct")) {
dirent.head = dir->parent->head;
p[26] = (u_char)dirent.head;
p[27] = (u_char)(dirent.head >> 8);
if (boot->ClustMask == CLUST32_MASK) {
p[20] = (u_char)(dirent.head >> 16);
p[21] = (u_char)(dirent.head >> 24);
}
mod |= THISMOD|FSDIRMOD;
} else
mod |= FSERROR;
}
}
continue;
} else { //only one directory entry can point to dir->head, it's '.'
if (dirent.head == dir->head) {
pwarn("%s entry in %s has incorrect start cluster.remove\n",