NetBSD-5.0.2/sbin/fsck_ext2fs/utilities.c
/* $NetBSD: utilities.c,v 1.17 2008/03/16 23:17:55 lukem Exp $ */
/*
* Copyright (c) 1980, 1986, 1993
* The Regents of the University of California. All rights reserved.
*
* 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. 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 REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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.
*/
/*
* Copyright (c) 1997 Manuel Bouyer.
*
* 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 Manuel Bouyer.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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>
#ifndef lint
#if 0
static char sccsid[] = "@(#)utilities.c 8.1 (Berkeley) 6/5/93";
#else
__RCSID("$NetBSD: utilities.c,v 1.17 2008/03/16 23:17:55 lukem Exp $");
#endif
#endif /* not lint */
#include <sys/param.h>
#include <sys/time.h>
#include <ufs/ext2fs/ext2fs_dinode.h>
#include <ufs/ext2fs/ext2fs_dir.h>
#include <ufs/ext2fs/ext2fs.h>
#include <ufs/ufs/dinode.h> /* for IFMT & friends */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <unistd.h>
#include <signal.h>
#include "fsutil.h"
#include "fsck.h"
#include "extern.h"
#include "exitvalues.h"
long diskreads, totalreads; /* Disk cache statistics */
static void rwerror(const char *, daddr_t);
extern int returntosingle;
int
ftypeok(struct ext2fs_dinode *dp)
{
switch (fs2h16(dp->e2di_mode) & IFMT) {
case IFDIR:
case IFREG:
case IFBLK:
case IFCHR:
case IFLNK:
case IFSOCK:
case IFIFO:
return (1);
default:
if (debug)
printf("bad file type 0%o\n", fs2h16(dp->e2di_mode));
return (0);
}
}
int
reply(const char *question)
{
int persevere;
char c;
if (preen)
pfatal("INTERNAL ERROR: GOT TO reply()");
persevere = !strcmp(question, "CONTINUE");
printf("\n");
if (!persevere && (nflag || fswritefd < 0)) {
printf("%s? no\n\n", question);
return (0);
}
if (yflag || (persevere && nflag)) {
printf("%s? yes\n\n", question);
return (1);
}
do {
printf("%s? [yn] ", question);
(void) fflush(stdout);
c = getc(stdin);
while (c != '\n' && getc(stdin) != '\n')
if (feof(stdin))
return (0);
} while (c != 'y' && c != 'Y' && c != 'n' && c != 'N');
printf("\n");
if (c == 'y' || c == 'Y')
return (1);
return (0);
}
/*
* Malloc buffers and set up cache.
*/
void
bufinit(void)
{
struct bufarea *bp;
long bufcnt, i;
char *bufp;
diskreads = totalreads = 0;
pbp = pdirbp = (struct bufarea *)0;
bufhead.b_next = bufhead.b_prev = &bufhead;
bufcnt = MAXBUFSPACE / sblock.e2fs_bsize;
if (bufcnt < MINBUFS)
bufcnt = MINBUFS;
for (i = 0; i < bufcnt; i++) {
bp = (struct bufarea *)malloc(sizeof(struct bufarea));
bufp = malloc((unsigned int)sblock.e2fs_bsize);
if (bp == NULL || bufp == NULL) {
if (i >= MINBUFS)
break;
errexit("cannot allocate buffer pool");
}
bp->b_un.b_buf = bufp;
bp->b_prev = &bufhead;
bp->b_next = bufhead.b_next;
bufhead.b_next->b_prev = bp;
bufhead.b_next = bp;
initbarea(bp);
}
bufhead.b_size = i; /* save number of buffers */
}
/*
* Manage a cache of directory blocks.
*/
struct bufarea *
getdatablk(daddr_t blkno, long size)
{
struct bufarea *bp;
for (bp = bufhead.b_next; bp != &bufhead; bp = bp->b_next)
if (bp->b_bno == fsbtodb(&sblock, blkno))
goto foundit;
for (bp = bufhead.b_prev; bp != &bufhead; bp = bp->b_prev)
if ((bp->b_flags & B_INUSE) == 0)
break;
if (bp == &bufhead)
errexit("deadlocked buffer pool");
getblk(bp, blkno, size);
diskreads++;
/* fall through */
foundit:
totalreads++;
bp->b_prev->b_next = bp->b_next;
bp->b_next->b_prev = bp->b_prev;
bp->b_prev = &bufhead;
bp->b_next = bufhead.b_next;
bufhead.b_next->b_prev = bp;
bufhead.b_next = bp;
bp->b_flags |= B_INUSE;
return (bp);
}
void
getblk(struct bufarea *bp, daddr_t blk, long size)
{
daddr_t dblk;
dblk = fsbtodb(&sblock, blk);
if (bp->b_bno != dblk) {
flush(fswritefd, bp);
bp->b_errs = bread(fsreadfd, bp->b_un.b_buf, dblk, size);
bp->b_bno = dblk;
bp->b_size = size;
}
}
void
flush(int fd, struct bufarea *bp)
{
int i;
if (!bp->b_dirty)
return;
if (bp->b_errs != 0)
pfatal("WRITING %sZERO'ED BLOCK %lld TO DISK\n",
(bp->b_errs == bp->b_size / dev_bsize) ? "" : "PARTIALLY ",
(long long)bp->b_bno);
bp->b_dirty = 0;
bp->b_errs = 0;
bwrite(fd, bp->b_un.b_buf, bp->b_bno, (long)bp->b_size);
if (bp != &sblk)
return;
for (i = 0; i < sblock.e2fs_ngdb; i++) {
bwrite(fswritefd, (char *)
&sblock.e2fs_gd[i* sblock.e2fs_bsize / sizeof(struct ext2_gd)],
fsbtodb(&sblock, ((sblock.e2fs_bsize>1024)?0:1)+i+1),
sblock.e2fs_bsize);
}
}
static void
rwerror(const char *mesg, daddr_t blk)
{
if (preen == 0)
printf("\n");
pfatal("CANNOT %s: BLK %lld", mesg, (long long)blk);
if (reply("CONTINUE") == 0)
errexit("Program terminated");
}
void
ckfini(int markclean)
{
struct bufarea *bp, *nbp;
int cnt = 0;
if (fswritefd < 0) {
(void)close(fsreadfd);
return;
}
flush(fswritefd, &sblk);
if (havesb && sblk.b_bno != SBOFF / dev_bsize &&
!preen && reply("UPDATE STANDARD SUPERBLOCKS")) {
sblk.b_bno = SBOFF / dev_bsize;
sbdirty();
flush(fswritefd, &sblk);
copyback_sb(&asblk);
asblk.b_dirty = 1;
flush(fswritefd, &asblk);
}
for (bp = bufhead.b_prev; bp && bp != &bufhead; bp = nbp) {
cnt++;
flush(fswritefd, bp);
nbp = bp->b_prev;
free(bp->b_un.b_buf);
free((char *)bp);
}
if (bufhead.b_size != cnt)
errexit("Panic: lost %d buffers", bufhead.b_size - cnt);
pbp = pdirbp = (struct bufarea *)0;
if (markclean && (sblock.e2fs.e2fs_state & E2FS_ISCLEAN) == 0) {
/*
* Mark the file system as clean, and sync the superblock.
*/
if (preen)
pwarn("MARKING FILE SYSTEM CLEAN\n");
else if (!reply("MARK FILE SYSTEM CLEAN"))
markclean = 0;
if (markclean) {
sblock.e2fs.e2fs_state = E2FS_ISCLEAN;
sbdirty();
flush(fswritefd, &sblk);
}
}
if (debug)
printf("cache missed %ld of %ld (%d%%)\n", diskreads,
totalreads, (int)(diskreads * 100 / totalreads));
(void)close(fsreadfd);
(void)close(fswritefd);
}
int
bread(int fd, char *buf, daddr_t blk, long size)
{
char *cp;
int i, errs;
off_t offset;
offset = blk;
offset *= dev_bsize;
if (lseek(fd, offset, 0) < 0)
rwerror("SEEK", blk);
else if (read(fd, buf, (int)size) == size)
return (0);
rwerror("READ", blk);
if (lseek(fd, offset, 0) < 0)
rwerror("SEEK", blk);
errs = 0;
memset(buf, 0, (size_t)size);
printf("THE FOLLOWING DISK SECTORS COULD NOT BE READ:");
for (cp = buf, i = 0; i < size; i += secsize, cp += secsize) {
if (read(fd, cp, (int)secsize) != secsize) {
(void)lseek(fd, offset + i + secsize, 0);
if (secsize != dev_bsize && dev_bsize != 1)
printf(" %lld (%lld),",
(long long)((blk*dev_bsize + i) / secsize),
(long long)(blk + i / dev_bsize));
else
printf(" %lld,", (long long)(blk +
i / dev_bsize));
errs++;
}
}
printf("\n");
return (errs);
}
void
bwrite(int fd, char *buf, daddr_t blk, long size)
{
int i;
char *cp;
off_t offset;
if (fd < 0)
return;
offset = blk;
offset *= dev_bsize;
if (lseek(fd, offset, 0) < 0)
rwerror("SEEK", blk);
else if (write(fd, buf, (int)size) == size) {
fsmodified = 1;
return;
}
rwerror("WRITE", blk);
if (lseek(fd, offset, 0) < 0)
rwerror("SEEK", blk);
printf("THE FOLLOWING SECTORS COULD NOT BE WRITTEN:");
for (cp = buf, i = 0; i < size; i += dev_bsize, cp += dev_bsize)
if (write(fd, cp, (int)dev_bsize) != dev_bsize) {
(void)lseek(fd, offset + i + dev_bsize, 0);
printf(" %lld,", (long long)(blk + i / dev_bsize));
}
printf("\n");
return;
}
/*
* allocate a data block
*/
int
allocblk(void)
{
int i;
for (i = 0; i < maxfsblock - 1; i++) {
if (testbmap(i))
continue;
setbmap(i);
n_blks++;
return (i);
}
return (0);
}
/*
* Free a previously allocated block
*/
void
freeblk(daddr_t blkno)
{
struct inodesc idesc;
idesc.id_blkno = blkno;
idesc.id_numfrags = 1;
(void)pass4check(&idesc);
}
/*
* Find a pathname
*/
void
getpathname(char *namebuf, size_t namebuflen, ino_t curdir, ino_t ino)
{
int len;
char *cp;
struct inodesc idesc;
static int busy = 0;
if (curdir == ino && ino == EXT2_ROOTINO) {
(void)strlcpy(namebuf, "/", namebuflen);
return;
}
if (busy ||
(statemap[curdir] != DSTATE && statemap[curdir] != DFOUND)) {
(void)strlcpy(namebuf, "?", namebuflen);
return;
}
busy = 1;
memset(&idesc, 0, sizeof(struct inodesc));
idesc.id_type = DATA;
idesc.id_fix = IGNORE;
cp = &namebuf[MAXPATHLEN - 1];
*cp = '\0';
if (curdir != ino) {
idesc.id_parent = curdir;
goto namelookup;
}
while (ino != EXT2_ROOTINO) {
idesc.id_number = ino;
idesc.id_func = findino;
idesc.id_name = "..";
if ((ckinode(ginode(ino), &idesc) & FOUND) == 0)
break;
namelookup:
idesc.id_number = idesc.id_parent;
idesc.id_parent = ino;
idesc.id_func = findname;
idesc.id_name = namebuf;
if ((ckinode(ginode(idesc.id_number), &idesc)&FOUND) == 0)
break;
len = strlen(namebuf);
cp -= len;
memcpy(cp, namebuf, (size_t)len);
*--cp = '/';
if (cp < &namebuf[EXT2FS_MAXNAMLEN])
break;
ino = idesc.id_number;
}
busy = 0;
if (ino != EXT2_ROOTINO)
*--cp = '?';
memcpy(namebuf, cp, (size_t)(&namebuf[MAXPATHLEN] - cp));
}
void
catch(int n)
{
ckfini(0);
exit(FSCK_EXIT_SIGNALLED);
}
/*
* When preening, allow a single quit to signal
* a special exit after filesystem checks complete
* so that reboot sequence may be interrupted.
*/
void
catchquit(int n)
{
printf("returning to single-user after filesystem check\n");
returntosingle = 1;
(void)signal(SIGQUIT, SIG_DFL);
}
/*
* Ignore a single quit signal; wait and flush just in case.
* Used by child processes in preen.
*/
void
voidquit(int n)
{
sleep(1);
(void)signal(SIGQUIT, SIG_IGN);
(void)signal(SIGQUIT, SIG_DFL);
}
/*
* determine whether an inode should be fixed.
*/
int
dofix(struct inodesc *idesc, const char *msg)
{
switch (idesc->id_fix) {
case DONTKNOW:
if (idesc->id_type == DATA)
direrror(idesc->id_number, msg);
else
pwarn("%s", msg);
if (preen) {
printf(" (SALVAGED)\n");
idesc->id_fix = FIX;
return (ALTERED);
}
if (reply("SALVAGE") == 0) {
idesc->id_fix = NOFIX;
return (0);
}
idesc->id_fix = FIX;
return (ALTERED);
case FIX:
return (ALTERED);
case NOFIX:
case IGNORE:
return (0);
default:
errexit("UNKNOWN INODESC FIX MODE %d", idesc->id_fix);
}
/* NOTREACHED */
}