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Bug fixes from NetBSD

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- fix sign-compare issues.
- ANSIfy a couple of functions.
- Remove more duplicate #includes.
- Memory leak found by Coverity on NetBSD.

Submitted by:	Pedro F. Giffuni <giffunip tutopia com>
Reviewed by:	bde
MFC after:	2 weeks
This commit is contained in:
Konstantin Belousov 2010-02-14 12:30:30 +00:00
parent a1882ff2a2
commit 6069db97f6
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=203872
7 changed files with 100 additions and 70 deletions
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34
sbin/fsck_msdosfs/boot.c
View File

@ -33,7 +33,6 @@ static const char rcsid[] =
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <stdio.h>
#include <unistd.h>
@ -41,16 +40,15 @@ static const char rcsid[] =
#include "fsutil.h"
int
readboot(dosfs, boot)
int dosfs;
struct bootblock *boot;
readboot(int dosfs, struct bootblock *boot)
{
u_char block[DOSBOOTBLOCKSIZE];
u_char fsinfo[2 * DOSBOOTBLOCKSIZE];
u_char backup[DOSBOOTBLOCKSIZE];
int ret = FSOK;
int i;
if (read(dosfs, block, sizeof block) < sizeof block) {
if ((size_t)read(dosfs, block, sizeof block) != sizeof block) {
perror("could not read boot block");
return FSFATAL;
}
@ -154,12 +152,22 @@ readboot(dosfs, boot)
}
backup[65] = block[65]; /* XXX */
if (memcmp(block + 11, backup + 11, 79)) {
/* Correct? XXX */
pfatal("backup doesn't compare to primary bootblock");
if (alwaysno)
pfatal("\n");
else
return FSFATAL;
/*
* XXX We require a reference that explains
* that these bytes need to match, or should
* drop the check. gdt@NetBSD has observed
* filesystems that work fine under Windows XP
* and NetBSD that do not match, so the
* requirement is suspect. For now, just
* print out useful information and continue.
*/
pfatal("backup (block %d) mismatch with primary bootblock:\n",
boot->Backup);
for (i = 11; i < 11 + 90; i++) {
if (block[i] != backup[i])
pfatal("\ti=%d\tprimary 0x%02x\tbackup 0x%02x\n",
i, block[i], backup[i]);
}
}
/* Check backup FSInfo? XXX */
}
@ -223,9 +231,7 @@ readboot(dosfs, boot)
}
int
writefsinfo(dosfs, boot)
int dosfs;
struct bootblock *boot;
writefsinfo(int dosfs, struct bootblock *boot)
{
u_char fsinfo[2 * DOSBOOTBLOCKSIZE];

4
sbin/fsck_msdosfs/check.c
View File

@ -33,7 +33,6 @@ static const char rcsid[] =
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>
@ -47,7 +46,8 @@ checkfilesys(const char *fname)
int dosfs;
struct bootblock boot;
struct fatEntry *fat = NULL;
int i, finish_dosdirsection=0;
int finish_dosdirsection=0;
u_int i;
int mod = 0;
int ret = 8;

50
sbin/fsck_msdosfs/dir.c
View File

@ -37,7 +37,6 @@ static const char rcsid[] =
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <stdio.h>
#include <unistd.h>
#include <time.h>
@ -223,12 +222,24 @@ resetDosDirSection(struct bootblock *boot, struct fatEntry *fat)
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");
if ((buffer = malloc( b1 > b2 ? b1 : b2)) == NULL) {
perror("No space for directory buffer");
return FSFATAL;
}
if ((delbuf = malloc(b2)) == NULL) {
free(buffer);
perror("No space for directory delbuf");
return FSFATAL;
}
if ((rootDir = newDosDirEntry()) == NULL) {
free(buffer);
free(delbuf);
perror("No space for directory entry");
return FSFATAL;
}
memset(rootDir, 0, sizeof *rootDir);
if (boot->flags & FAT32) {
if (boot->RootCl < CLUST_FIRST || boot->RootCl >= boot->NumClusters) {
@ -360,7 +371,8 @@ removede(int f, struct bootblock *boot, struct fatEntry *fat, u_char *start,
return FSFATAL;
start = buffer;
}
if (endcl == curcl)
/* startcl is < CLUST_FIRST for !fat32 root */
if ((endcl == curcl) || (startcl < CLUST_FIRST))
for (; start < end; start += 32)
*start = SLOT_DELETED;
return FSDIRMOD;
@ -378,7 +390,7 @@ checksize(struct bootblock *boot, struct fatEntry *fat, u_char *p,
/*
* Check size on ordinary files
*/
int32_t physicalSize;
u_int32_t physicalSize;
if (dir->head == CLUST_FREE)
physicalSize = 0;
@ -637,7 +649,8 @@ readDosDirSection(int f, struct bootblock *boot, struct fatEntry *fat,
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);
strlcpy(dirent.lname, longName,
sizeof(dirent.lname));
longName[0] = '\0';
shortSum = -1;
}
@ -825,6 +838,10 @@ readDosDirSection(int f, struct bootblock *boot, struct fatEntry *fat,
}
boot->NumFiles++;
}
if (!(boot->flags & FAT32) && !dir->parent)
break;
if (mod & THISMOD) {
last *= 32;
if (lseek(f, off, SEEK_SET) != off
@ -840,6 +857,19 @@ readDosDirSection(int f, struct bootblock *boot, struct fatEntry *fat,
invlfn ? invlfn : vallfn, p,
invlfn ? invcl : valcl, -1, 0,
fullpath(dir), 1);
/* The root directory of non fat32 filesystems is in a special
* area and may have been modified above without being written out.
*/
if ((mod & FSDIRMOD) && !(boot->flags & FAT32) && !dir->parent) {
last *= 32;
if (lseek(f, off, SEEK_SET) != off
|| write(f, buffer, last) != last) {
perror("Unable to write directory");
return FSFATAL;
}
mod &= ~THISMOD;
}
return mod & ~THISMOD;
}
@ -929,7 +959,7 @@ reconnect(int dosfs, struct bootblock *boot, struct fatEntry *fat, cl_t head)
lfoff = lfcl * boot->ClusterSize
+ boot->ClusterOffset * boot->BytesPerSec;
if (lseek(dosfs, lfoff, SEEK_SET) != lfoff
|| read(dosfs, lfbuf, boot->ClusterSize) != boot->ClusterSize) {
|| (size_t)read(dosfs, lfbuf, boot->ClusterSize) != boot->ClusterSize) {
perror("could not read LOST.DIR");
return FSFATAL;
}
@ -959,7 +989,7 @@ reconnect(int dosfs, struct bootblock *boot, struct fatEntry *fat, cl_t head)
p[31] = (u_char)(d.size >> 24);
fat[head].flags |= FAT_USED;
if (lseek(dosfs, lfoff, SEEK_SET) != lfoff
|| write(dosfs, lfbuf, boot->ClusterSize) != boot->ClusterSize) {
|| (size_t)write(dosfs, lfbuf, boot->ClusterSize) != boot->ClusterSize) {
perror("could not write LOST.DIR");
return FSFATAL;
}

12
sbin/fsck_msdosfs/dosfs.h
View File

@ -48,8 +48,13 @@ struct bootblock {
u_int FATsmall; /* number of sectors per FAT */
u_int SecPerTrack; /* sectors per track */
u_int Heads; /* number of heads */
u_int32_t Sectors; /* total number of sectors */
u_int32_t HiddenSecs; /* # of hidden sectors */
u_int32_t Sectors; /* total number of sectors */
#define FAT32 1 /* this is a FAT32 file system */
/*
* Maybe, we should separate out
* various parts of FAT32? XXX
*/
u_int32_t HugeSectors; /* # of sectors if bpbSectors == 0 */
u_int FSInfo; /* FSInfo sector */
u_int Backup; /* Backup of Bootblocks */
@ -59,11 +64,6 @@ struct bootblock {
/* and some more calculated values */
u_int flags; /* some flags: */
#define FAT32 1 /* this is a FAT32 file system */
/*
* Maybe, we should separate out
* various parts of FAT32? XXX
*/
int ValidFat; /* valid fat if FAT32 non-mirrored */
cl_t ClustMask; /* mask for entries in FAT */
cl_t NumClusters; /* # of entries in a FAT */

10
sbin/fsck_msdosfs/ext.h
View File

@ -70,12 +70,12 @@ int checkfilesys(const char *);
#define FSDIRMOD 2 /* Some directory was modified */
#define FSFATMOD 4 /* The FAT was modified */
#define FSERROR 8 /* Some unrecovered error remains */
#define FSFATAL 16 /* Some unrecoverable error occured */
#define FSFATAL 16 /* Some unrecoverable error occurred */
#define FSDIRTY 32 /* File system is dirty */
#define FSFIXFAT 64 /* Fix file system FAT */
/*
* read a boot block in a machine independend fashion and translate
* read a boot block in a machine independent fashion and translate
* it into our struct bootblock.
*/
int readboot(int, struct bootblock *);
@ -89,13 +89,13 @@ int writefsinfo(int, struct bootblock *);
* Read one of the FAT copies and return a pointer to the new
* allocated array holding our description of it.
*/
int readfat(int, struct bootblock *, int, struct fatEntry **);
int readfat(int, struct bootblock *, u_int, struct fatEntry **);
/*
* Check two FAT copies for consistency and merge changes into the
* first if neccessary.
* first if necessary.
*/
int comparefat(struct bootblock *, struct fatEntry *, struct fatEntry *, int);
int comparefat(struct bootblock *, struct fatEntry *, struct fatEntry *, u_int);
/*
* Check a FAT

55
sbin/fsck_msdosfs/fat.c
View File

@ -40,10 +40,10 @@ static const char rcsid[] =
#include "ext.h"
#include "fsutil.h"
static int checkclnum(struct bootblock *, int, cl_t, cl_t *);
static int clustdiffer(cl_t, cl_t *, cl_t *, int);
static int checkclnum(struct bootblock *, u_int, cl_t, cl_t *);
static int clustdiffer(cl_t, cl_t *, cl_t *, u_int);
static int tryclear(struct bootblock *, struct fatEntry *, cl_t, cl_t *);
static int _readfat(int, struct bootblock *, int, u_char **);
static int _readfat(int, struct bootblock *, u_int, u_char **);
/*-
* The first 2 FAT entries contain pseudo-cluster numbers with the following
@ -128,7 +128,7 @@ checkdirty(int fs, struct bootblock *boot)
* Check a cluster number for valid value
*/
static int
checkclnum(struct bootblock *boot, int fat, cl_t cl, cl_t *next)
checkclnum(struct bootblock *boot, u_int fat, cl_t cl, cl_t *next)
{
if (*next >= (CLUST_RSRVD&boot->ClustMask))
*next |= ~boot->ClustMask;
@ -159,7 +159,7 @@ checkclnum(struct bootblock *boot, int fat, cl_t cl, cl_t *next)
* Read a FAT from disk. Returns 1 if successful, 0 otherwise.
*/
static int
_readfat(int fs, struct bootblock *boot, int no, u_char **buffer)
_readfat(int fs, struct bootblock *boot, u_int no, u_char **buffer)
{
off_t off;
@ -177,7 +177,7 @@ _readfat(int fs, struct bootblock *boot, int no, u_char **buffer)
goto err;
}
if (read(fs, *buffer, boot->FATsecs * boot->BytesPerSec)
if ((size_t)read(fs, *buffer, boot->FATsecs * boot->BytesPerSec)
!= boot->FATsecs * boot->BytesPerSec) {
perror("Unable to read FAT");
goto err;
@ -194,24 +194,26 @@ _readfat(int fs, struct bootblock *boot, int no, u_char **buffer)
* Read a FAT and decode it into internal format
*/
int
readfat(int fs, struct bootblock *boot, int no, struct fatEntry **fp)
readfat(int fs, struct bootblock *boot, u_int no, struct fatEntry **fp)
{
struct fatEntry *fat;
u_char *buffer, *p;
cl_t cl;
int ret = FSOK;
size_t len;
boot->NumFree = boot->NumBad = 0;
if (!_readfat(fs, boot, no, &buffer))
return FSFATAL;
fat = calloc(boot->NumClusters, sizeof(struct fatEntry));
fat = malloc(len = boot->NumClusters * sizeof(struct fatEntry));
if (fat == NULL) {
perror("No space for FAT");
free(buffer);
return FSFATAL;
}
(void)memset(fat, 0, len);
if (buffer[0] != boot->Media
|| buffer[1] != 0xff || buffer[2] != 0xff
@ -304,6 +306,10 @@ readfat(int fs, struct bootblock *boot, int no, struct fatEntry **fp)
}
free(buffer);
if (ret & FSFATAL) {
free(fat);
*fp = NULL;
} else
*fp = fat;
return ret;
}
@ -324,7 +330,7 @@ rsrvdcltype(cl_t cl)
}
static int
clustdiffer(cl_t cl, cl_t *cp1, cl_t *cp2, int fatnum)
clustdiffer(cl_t cl, cl_t *cp1, cl_t *cp2, u_int fatnum)
{
if (*cp1 == CLUST_FREE || *cp1 >= CLUST_RSRVD) {
if (*cp2 == CLUST_FREE || *cp2 >= CLUST_RSRVD) {
@ -339,13 +345,13 @@ clustdiffer(cl_t cl, cl_t *cp1, cl_t *cp2, int fatnum)
}
return FSFATAL;
}
pwarn("Cluster %u is marked %s in FAT 0, %s in FAT %d\n",
pwarn("Cluster %u is marked %s in FAT 0, %s in FAT %u\n",
cl, rsrvdcltype(*cp1), rsrvdcltype(*cp2), fatnum);
if (ask(0, "Use FAT 0's entry")) {
*cp2 = *cp1;
return FSFATMOD;
}
if (ask(0, "Use FAT %d's entry", fatnum)) {
if (ask(0, "Use FAT %u's entry", fatnum)) {
*cp1 = *cp2;
return FSFATMOD;
}
@ -353,7 +359,7 @@ clustdiffer(cl_t cl, cl_t *cp1, cl_t *cp2, int fatnum)
}
pwarn("Cluster %u is marked %s in FAT 0, but continues with cluster %u in FAT %d\n",
cl, rsrvdcltype(*cp1), *cp2, fatnum);
if (ask(0, "Use continuation from FAT %d", fatnum)) {
if (ask(0, "Use continuation from FAT %u", fatnum)) {
*cp1 = *cp2;
return FSFATMOD;
}
@ -364,7 +370,7 @@ clustdiffer(cl_t cl, cl_t *cp1, cl_t *cp2, int fatnum)
return FSFATAL;
}
if (*cp2 == CLUST_FREE || *cp2 >= CLUST_RSRVD) {
pwarn("Cluster %u continues with cluster %u in FAT 0, but is marked %s in FAT %d\n",
pwarn("Cluster %u continues with cluster %u in FAT 0, but is marked %s in FAT %u\n",
cl, *cp1, rsrvdcltype(*cp2), fatnum);
if (ask(0, "Use continuation from FAT 0")) {
*cp2 = *cp1;
@ -376,13 +382,13 @@ clustdiffer(cl_t cl, cl_t *cp1, cl_t *cp2, int fatnum)
}
return FSERROR;
}
pwarn("Cluster %u continues with cluster %u in FAT 0, but with cluster %u in FAT %d\n",
pwarn("Cluster %u continues with cluster %u in FAT 0, but with cluster %u in FAT %u\n",
cl, *cp1, *cp2, fatnum);
if (ask(0, "Use continuation from FAT 0")) {
*cp2 = *cp1;
return FSFATMOD;
}
if (ask(0, "Use continuation from FAT %d", fatnum)) {
if (ask(0, "Use continuation from FAT %u", fatnum)) {
*cp1 = *cp2;
return FSFATMOD;
}
@ -395,7 +401,7 @@ clustdiffer(cl_t cl, cl_t *cp1, cl_t *cp2, int fatnum)
*/
int
comparefat(struct bootblock *boot, struct fatEntry *first,
struct fatEntry *second, int fatnum)
struct fatEntry *second, u_int fatnum)
{
cl_t cl;
int ret = FSOK;
@ -535,8 +541,8 @@ writefat(int fs, struct bootblock *boot, struct fatEntry *fat, int correct_fat)
{
u_char *buffer, *p;
cl_t cl;
int i;
u_int32_t fatsz;
u_int i;
size_t fatsz;
off_t off;
int ret = FSOK;
@ -626,7 +632,7 @@ writefat(int fs, struct bootblock *boot, struct fatEntry *fat, int correct_fat)
off = boot->ResSectors + i * boot->FATsecs;
off *= boot->BytesPerSec;
if (lseek(fs, off, SEEK_SET) != off
|| write(fs, buffer, fatsz) != fatsz) {
|| (size_t)write(fs, buffer, fatsz) != fatsz) {
perror("Unable to write FAT");
ret = FSFATAL; /* Return immediately? XXX */
}
@ -676,17 +682,6 @@ checklost(int dosfs, struct bootblock *boot, struct fatEntry *fat)
ret = 1;
}
}
if (boot->NumFree && fat[boot->FSNext].next != CLUST_FREE) {
pwarn("Next free cluster in FSInfo block (%u) not free\n",
boot->FSNext);
if (ask(1, "Fix"))
for (head = CLUST_FIRST; head < boot->NumClusters; head++)
if (fat[head].next == CLUST_FREE) {
boot->FSNext = head;
ret = 1;
break;
}
}
if (ret)
mod |= writefsinfo(dosfs, boot);
}

1
sbin/fsck_msdosfs/main.c
View File

@ -33,7 +33,6 @@ static const char rcsid[] =
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <stdio.h>
#include <unistd.h>
#include <errno.h>