NetBSD/sbin/fsck_lfs/utilities.c

313 lines
6.9 KiB
C

/* $NetBSD: utilities.c,v 1.27 2008/02/23 21:41:48 christos 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.
*/
#include <sys/param.h>
#include <sys/time.h>
#include <sys/mount.h>
#include <ufs/ufs/inode.h>
#include <ufs/ufs/dir.h>
#define buf ubuf
#define vnode uvnode
#include <ufs/lfs/lfs.h>
#include <err.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <unistd.h>
#include <signal.h>
#include "bufcache.h"
#include "vnode.h"
#include "lfs_user.h"
#include "segwrite.h"
#include "fsutil.h"
#include "fsck.h"
#include "extern.h"
#include "exitvalues.h"
long diskreads, totalreads; /* Disk cache statistics */
extern int returntosingle;
extern off_t locked_queue_bytes;
int
ftypeok(struct ufs1_dinode * dp)
{
switch (dp->di_mode & IFMT) {
case IFDIR:
case IFREG:
case IFBLK:
case IFCHR:
case IFLNK:
case IFSOCK:
case IFIFO:
return (1);
default:
if (debug)
pwarn("bad file type 0%o\n", dp->di_mode);
return (0);
}
}
int
reply(const char *question)
{
int persevere;
char c;
if (preen)
err(1, "INTERNAL ERROR: GOT TO reply()");
persevere = !strcmp(question, "CONTINUE");
pwarn("\n");
if (!persevere && nflag) {
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);
}
static void
write_superblocks(void)
{
if (debug)
pwarn("writing superblocks with lfs_idaddr = 0x%x\n",
(int)fs->lfs_idaddr);
lfs_writesuper(fs, fs->lfs_sboffs[0]);
lfs_writesuper(fs, fs->lfs_sboffs[1]);
fsmodified = 1;
}
void
ckfini(int markclean)
{
if (locked_queue_bytes > 0) {
if (preen || reply("WRITE CHANGES TO DISK") == 1) {
if (preen == 0)
pwarn("WRITING CHANGES TO DISK\n");
lfs_segwrite(fs, SEGM_CKP);
fsdirty = 0;
fsmodified = 1;
}
}
if (!nflag && (fs->lfs_pflags & LFS_PF_CLEAN) == 0) {
fs->lfs_pflags |= LFS_PF_CLEAN;
fsmodified = 1;
}
if (fsmodified && (preen || reply("UPDATE SUPERBLOCKS"))) {
sbdirty();
write_superblocks();
}
if (markclean && fsmodified) {
/*
* 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) {
fs->lfs_pflags |= LFS_PF_CLEAN;
sbdirty();
write_superblocks();
if (!preen)
printf(
"\n***** FILE SYSTEM MARKED CLEAN *****\n");
}
}
if (debug)
bufstats();
(void) close(fsreadfd);
}
/*
* Free a previously allocated block
*/
void
freeblk(daddr_t blkno, long frags)
{
struct inodesc idesc;
idesc.id_blkno = blkno;
idesc.id_numfrags = frags;
(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 == 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 != 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 (ginode(idesc.id_number) == NULL)
break;
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[LFS_MAXNAMLEN])
break;
ino = idesc.id_number;
}
busy = 0;
if (ino != 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:
err(EEXIT, "UNKNOWN INODESC FIX MODE %d\n", idesc->id_fix);
}
/* NOTREACHED */
}