Bug fixes from NetBSD
- 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
parent
a1882ff2a2
commit
6069db97f6
@ -33,7 +33,6 @@ static const char rcsid[] =
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#include <stdlib.h>
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#include <string.h>
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#include <ctype.h>
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#include <stdio.h>
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#include <unistd.h>
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@ -41,16 +40,15 @@ static const char rcsid[] =
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#include "fsutil.h"
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int
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readboot(dosfs, boot)
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int dosfs;
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struct bootblock *boot;
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readboot(int dosfs, struct bootblock *boot)
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{
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u_char block[DOSBOOTBLOCKSIZE];
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u_char fsinfo[2 * DOSBOOTBLOCKSIZE];
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u_char backup[DOSBOOTBLOCKSIZE];
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int ret = FSOK;
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int i;
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if (read(dosfs, block, sizeof block) < sizeof block) {
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if ((size_t)read(dosfs, block, sizeof block) != sizeof block) {
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perror("could not read boot block");
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return FSFATAL;
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}
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@ -154,12 +152,22 @@ readboot(dosfs, boot)
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}
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backup[65] = block[65]; /* XXX */
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if (memcmp(block + 11, backup + 11, 79)) {
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/* Correct? XXX */
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pfatal("backup doesn't compare to primary bootblock");
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if (alwaysno)
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pfatal("\n");
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else
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return FSFATAL;
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/*
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* XXX We require a reference that explains
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* that these bytes need to match, or should
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* drop the check. gdt@NetBSD has observed
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* filesystems that work fine under Windows XP
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* and NetBSD that do not match, so the
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* requirement is suspect. For now, just
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* print out useful information and continue.
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*/
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pfatal("backup (block %d) mismatch with primary bootblock:\n",
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boot->Backup);
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for (i = 11; i < 11 + 90; i++) {
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if (block[i] != backup[i])
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pfatal("\ti=%d\tprimary 0x%02x\tbackup 0x%02x\n",
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i, block[i], backup[i]);
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}
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}
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/* Check backup FSInfo? XXX */
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}
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@ -223,9 +231,7 @@ readboot(dosfs, boot)
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}
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int
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writefsinfo(dosfs, boot)
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int dosfs;
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struct bootblock *boot;
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writefsinfo(int dosfs, struct bootblock *boot)
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{
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u_char fsinfo[2 * DOSBOOTBLOCKSIZE];
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@ -33,7 +33,6 @@ static const char rcsid[] =
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#include <stdlib.h>
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#include <string.h>
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#include <ctype.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <fcntl.h>
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@ -47,7 +46,8 @@ checkfilesys(const char *fname)
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int dosfs;
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struct bootblock boot;
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struct fatEntry *fat = NULL;
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int i, finish_dosdirsection=0;
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int finish_dosdirsection=0;
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u_int i;
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int mod = 0;
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int ret = 8;
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@ -37,7 +37,6 @@ static const char rcsid[] =
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#include <stdlib.h>
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#include <string.h>
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#include <ctype.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <time.h>
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@ -223,12 +222,24 @@ resetDosDirSection(struct bootblock *boot, struct fatEntry *fat)
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b1 = boot->RootDirEnts * 32;
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b2 = boot->SecPerClust * boot->BytesPerSec;
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if (!(buffer = malloc(b1 > b2 ? b1 : b2))
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|| !(delbuf = malloc(b2))
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|| !(rootDir = newDosDirEntry())) {
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perror("No space for directory");
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if ((buffer = malloc( b1 > b2 ? b1 : b2)) == NULL) {
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perror("No space for directory buffer");
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return FSFATAL;
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}
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if ((delbuf = malloc(b2)) == NULL) {
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free(buffer);
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perror("No space for directory delbuf");
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return FSFATAL;
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}
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if ((rootDir = newDosDirEntry()) == NULL) {
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free(buffer);
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free(delbuf);
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perror("No space for directory entry");
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return FSFATAL;
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}
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memset(rootDir, 0, sizeof *rootDir);
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if (boot->flags & FAT32) {
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if (boot->RootCl < CLUST_FIRST || boot->RootCl >= boot->NumClusters) {
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@ -360,7 +371,8 @@ removede(int f, struct bootblock *boot, struct fatEntry *fat, u_char *start,
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return FSFATAL;
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start = buffer;
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}
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if (endcl == curcl)
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/* startcl is < CLUST_FIRST for !fat32 root */
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if ((endcl == curcl) || (startcl < CLUST_FIRST))
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for (; start < end; start += 32)
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*start = SLOT_DELETED;
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return FSDIRMOD;
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@ -378,7 +390,7 @@ checksize(struct bootblock *boot, struct fatEntry *fat, u_char *p,
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/*
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* Check size on ordinary files
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*/
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int32_t physicalSize;
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u_int32_t physicalSize;
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if (dir->head == CLUST_FREE)
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physicalSize = 0;
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@ -637,7 +649,8 @@ readDosDirSection(int f, struct bootblock *boot, struct fatEntry *fat,
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dirent.head |= (p[20] << 16) | (p[21] << 24);
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dirent.size = p[28] | (p[29] << 8) | (p[30] << 16) | (p[31] << 24);
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if (vallfn) {
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strcpy(dirent.lname, longName);
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strlcpy(dirent.lname, longName,
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sizeof(dirent.lname));
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longName[0] = '\0';
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shortSum = -1;
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}
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@ -825,6 +838,10 @@ readDosDirSection(int f, struct bootblock *boot, struct fatEntry *fat,
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}
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boot->NumFiles++;
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}
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if (!(boot->flags & FAT32) && !dir->parent)
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break;
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if (mod & THISMOD) {
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last *= 32;
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if (lseek(f, off, SEEK_SET) != off
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@ -840,6 +857,19 @@ readDosDirSection(int f, struct bootblock *boot, struct fatEntry *fat,
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invlfn ? invlfn : vallfn, p,
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invlfn ? invcl : valcl, -1, 0,
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fullpath(dir), 1);
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/* The root directory of non fat32 filesystems is in a special
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* area and may have been modified above without being written out.
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*/
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if ((mod & FSDIRMOD) && !(boot->flags & FAT32) && !dir->parent) {
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last *= 32;
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if (lseek(f, off, SEEK_SET) != off
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|| write(f, buffer, last) != last) {
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perror("Unable to write directory");
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return FSFATAL;
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}
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mod &= ~THISMOD;
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}
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return mod & ~THISMOD;
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}
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@ -929,7 +959,7 @@ reconnect(int dosfs, struct bootblock *boot, struct fatEntry *fat, cl_t head)
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lfoff = lfcl * boot->ClusterSize
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+ boot->ClusterOffset * boot->BytesPerSec;
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if (lseek(dosfs, lfoff, SEEK_SET) != lfoff
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|| read(dosfs, lfbuf, boot->ClusterSize) != boot->ClusterSize) {
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|| (size_t)read(dosfs, lfbuf, boot->ClusterSize) != boot->ClusterSize) {
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perror("could not read LOST.DIR");
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return FSFATAL;
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}
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@ -959,7 +989,7 @@ reconnect(int dosfs, struct bootblock *boot, struct fatEntry *fat, cl_t head)
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p[31] = (u_char)(d.size >> 24);
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fat[head].flags |= FAT_USED;
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if (lseek(dosfs, lfoff, SEEK_SET) != lfoff
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|| write(dosfs, lfbuf, boot->ClusterSize) != boot->ClusterSize) {
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|| (size_t)write(dosfs, lfbuf, boot->ClusterSize) != boot->ClusterSize) {
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perror("could not write LOST.DIR");
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return FSFATAL;
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}
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@ -48,8 +48,13 @@ struct bootblock {
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u_int FATsmall; /* number of sectors per FAT */
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u_int SecPerTrack; /* sectors per track */
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u_int Heads; /* number of heads */
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u_int32_t Sectors; /* total number of sectors */
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u_int32_t HiddenSecs; /* # of hidden sectors */
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u_int32_t Sectors; /* total number of sectors */
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#define FAT32 1 /* this is a FAT32 file system */
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/*
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* Maybe, we should separate out
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* various parts of FAT32? XXX
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*/
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u_int32_t HugeSectors; /* # of sectors if bpbSectors == 0 */
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u_int FSInfo; /* FSInfo sector */
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u_int Backup; /* Backup of Bootblocks */
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@ -59,11 +64,6 @@ struct bootblock {
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/* and some more calculated values */
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u_int flags; /* some flags: */
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#define FAT32 1 /* this is a FAT32 file system */
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/*
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* Maybe, we should separate out
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* various parts of FAT32? XXX
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*/
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int ValidFat; /* valid fat if FAT32 non-mirrored */
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cl_t ClustMask; /* mask for entries in FAT */
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cl_t NumClusters; /* # of entries in a FAT */
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@ -70,12 +70,12 @@ int checkfilesys(const char *);
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#define FSDIRMOD 2 /* Some directory was modified */
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#define FSFATMOD 4 /* The FAT was modified */
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#define FSERROR 8 /* Some unrecovered error remains */
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#define FSFATAL 16 /* Some unrecoverable error occured */
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#define FSFATAL 16 /* Some unrecoverable error occurred */
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#define FSDIRTY 32 /* File system is dirty */
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#define FSFIXFAT 64 /* Fix file system FAT */
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/*
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* read a boot block in a machine independend fashion and translate
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* read a boot block in a machine independent fashion and translate
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* it into our struct bootblock.
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*/
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int readboot(int, struct bootblock *);
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@ -89,13 +89,13 @@ int writefsinfo(int, struct bootblock *);
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* Read one of the FAT copies and return a pointer to the new
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* allocated array holding our description of it.
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*/
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int readfat(int, struct bootblock *, int, struct fatEntry **);
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int readfat(int, struct bootblock *, u_int, struct fatEntry **);
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/*
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* Check two FAT copies for consistency and merge changes into the
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* first if neccessary.
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* first if necessary.
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*/
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int comparefat(struct bootblock *, struct fatEntry *, struct fatEntry *, int);
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int comparefat(struct bootblock *, struct fatEntry *, struct fatEntry *, u_int);
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/*
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* Check a FAT
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@ -40,10 +40,10 @@ static const char rcsid[] =
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#include "ext.h"
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#include "fsutil.h"
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static int checkclnum(struct bootblock *, int, cl_t, cl_t *);
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static int clustdiffer(cl_t, cl_t *, cl_t *, int);
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static int checkclnum(struct bootblock *, u_int, cl_t, cl_t *);
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static int clustdiffer(cl_t, cl_t *, cl_t *, u_int);
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static int tryclear(struct bootblock *, struct fatEntry *, cl_t, cl_t *);
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static int _readfat(int, struct bootblock *, int, u_char **);
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static int _readfat(int, struct bootblock *, u_int, u_char **);
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/*-
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* The first 2 FAT entries contain pseudo-cluster numbers with the following
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@ -128,7 +128,7 @@ checkdirty(int fs, struct bootblock *boot)
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* Check a cluster number for valid value
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*/
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static int
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checkclnum(struct bootblock *boot, int fat, cl_t cl, cl_t *next)
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checkclnum(struct bootblock *boot, u_int fat, cl_t cl, cl_t *next)
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{
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if (*next >= (CLUST_RSRVD&boot->ClustMask))
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*next |= ~boot->ClustMask;
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@ -159,7 +159,7 @@ checkclnum(struct bootblock *boot, int fat, cl_t cl, cl_t *next)
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* Read a FAT from disk. Returns 1 if successful, 0 otherwise.
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*/
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static int
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_readfat(int fs, struct bootblock *boot, int no, u_char **buffer)
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_readfat(int fs, struct bootblock *boot, u_int no, u_char **buffer)
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{
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off_t off;
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@ -177,7 +177,7 @@ _readfat(int fs, struct bootblock *boot, int no, u_char **buffer)
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goto err;
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}
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if (read(fs, *buffer, boot->FATsecs * boot->BytesPerSec)
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if ((size_t)read(fs, *buffer, boot->FATsecs * boot->BytesPerSec)
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!= boot->FATsecs * boot->BytesPerSec) {
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perror("Unable to read FAT");
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goto err;
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@ -194,24 +194,26 @@ _readfat(int fs, struct bootblock *boot, int no, u_char **buffer)
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* Read a FAT and decode it into internal format
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*/
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int
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readfat(int fs, struct bootblock *boot, int no, struct fatEntry **fp)
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readfat(int fs, struct bootblock *boot, u_int no, struct fatEntry **fp)
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{
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struct fatEntry *fat;
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u_char *buffer, *p;
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cl_t cl;
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int ret = FSOK;
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size_t len;
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boot->NumFree = boot->NumBad = 0;
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if (!_readfat(fs, boot, no, &buffer))
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return FSFATAL;
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fat = calloc(boot->NumClusters, sizeof(struct fatEntry));
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fat = malloc(len = boot->NumClusters * sizeof(struct fatEntry));
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if (fat == NULL) {
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perror("No space for FAT");
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free(buffer);
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return FSFATAL;
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}
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(void)memset(fat, 0, len);
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if (buffer[0] != boot->Media
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|| buffer[1] != 0xff || buffer[2] != 0xff
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@ -304,7 +306,11 @@ readfat(int fs, struct bootblock *boot, int no, struct fatEntry **fp)
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}
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free(buffer);
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*fp = fat;
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if (ret & FSFATAL) {
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free(fat);
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*fp = NULL;
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} else
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*fp = fat;
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return ret;
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}
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@ -324,7 +330,7 @@ rsrvdcltype(cl_t cl)
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}
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static int
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clustdiffer(cl_t cl, cl_t *cp1, cl_t *cp2, int fatnum)
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clustdiffer(cl_t cl, cl_t *cp1, cl_t *cp2, u_int fatnum)
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{
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if (*cp1 == CLUST_FREE || *cp1 >= CLUST_RSRVD) {
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if (*cp2 == CLUST_FREE || *cp2 >= CLUST_RSRVD) {
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@ -339,13 +345,13 @@ clustdiffer(cl_t cl, cl_t *cp1, cl_t *cp2, int fatnum)
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}
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return FSFATAL;
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}
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pwarn("Cluster %u is marked %s in FAT 0, %s in FAT %d\n",
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pwarn("Cluster %u is marked %s in FAT 0, %s in FAT %u\n",
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cl, rsrvdcltype(*cp1), rsrvdcltype(*cp2), fatnum);
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if (ask(0, "Use FAT 0's entry")) {
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*cp2 = *cp1;
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return FSFATMOD;
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}
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if (ask(0, "Use FAT %d's entry", fatnum)) {
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if (ask(0, "Use FAT %u's entry", fatnum)) {
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*cp1 = *cp2;
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return FSFATMOD;
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}
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@ -353,7 +359,7 @@ clustdiffer(cl_t cl, cl_t *cp1, cl_t *cp2, int fatnum)
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}
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pwarn("Cluster %u is marked %s in FAT 0, but continues with cluster %u in FAT %d\n",
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cl, rsrvdcltype(*cp1), *cp2, fatnum);
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if (ask(0, "Use continuation from FAT %d", fatnum)) {
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if (ask(0, "Use continuation from FAT %u", fatnum)) {
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*cp1 = *cp2;
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return FSFATMOD;
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}
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@ -364,7 +370,7 @@ clustdiffer(cl_t cl, cl_t *cp1, cl_t *cp2, int fatnum)
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return FSFATAL;
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}
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if (*cp2 == CLUST_FREE || *cp2 >= CLUST_RSRVD) {
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pwarn("Cluster %u continues with cluster %u in FAT 0, but is marked %s in FAT %d\n",
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pwarn("Cluster %u continues with cluster %u in FAT 0, but is marked %s in FAT %u\n",
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cl, *cp1, rsrvdcltype(*cp2), fatnum);
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if (ask(0, "Use continuation from FAT 0")) {
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*cp2 = *cp1;
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@ -376,13 +382,13 @@ clustdiffer(cl_t cl, cl_t *cp1, cl_t *cp2, int fatnum)
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}
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return FSERROR;
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}
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pwarn("Cluster %u continues with cluster %u in FAT 0, but with cluster %u in FAT %d\n",
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pwarn("Cluster %u continues with cluster %u in FAT 0, but with cluster %u in FAT %u\n",
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cl, *cp1, *cp2, fatnum);
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if (ask(0, "Use continuation from FAT 0")) {
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*cp2 = *cp1;
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return FSFATMOD;
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}
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if (ask(0, "Use continuation from FAT %d", fatnum)) {
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if (ask(0, "Use continuation from FAT %u", fatnum)) {
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*cp1 = *cp2;
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return FSFATMOD;
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}
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@ -394,8 +400,8 @@ clustdiffer(cl_t cl, cl_t *cp1, cl_t *cp2, int fatnum)
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* into the first one.
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*/
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int
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comparefat(struct bootblock *boot, struct fatEntry *first,
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struct fatEntry *second, int fatnum)
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comparefat(struct bootblock *boot, struct fatEntry *first,
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struct fatEntry *second, u_int fatnum)
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{
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cl_t cl;
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int ret = FSOK;
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@ -535,8 +541,8 @@ writefat(int fs, struct bootblock *boot, struct fatEntry *fat, int correct_fat)
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{
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u_char *buffer, *p;
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cl_t cl;
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int i;
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u_int32_t fatsz;
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u_int i;
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size_t fatsz;
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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);
|
||||
}
|
||||
|
||||
@ -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>
|
||||
|
||||
Loading…
Reference in New Issue
Block a user