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1376 lines
33 KiB
C
1376 lines
33 KiB
C
/*
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* fsck.c - a file system consistency checker for Linux.
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*
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* (C) 1991, 1992 Linus Torvalds. This file may be redistributed
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* as per the GNU copyleft.
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*/
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/*
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* 09.11.91 - made the first rudimetary functions
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*
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* 10.11.91 - updated, does checking, no repairs yet.
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* Sent out to the mailing-list for testing.
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*
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* 14.11.91 - Testing seems to have gone well. Added some
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* correction-code, and changed some functions.
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*
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* 15.11.91 - More correction code. Hopefully it notices most
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* cases now, and tries to do something about them.
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*
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* 16.11.91 - More corrections (thanks to Mika Jalava). Most
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* things seem to work now. Yeah, sure.
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*
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*
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* 19.04.92 - Had to start over again from this old version, as a
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* kernel bug ate my enhanced fsck in february.
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*
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* 28.02.93 - added support for different directory entry sizes..
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*
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* Sat Mar 6 18:59:42 1993, faith@cs.unc.edu: Output namelen with
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* super-block information
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*
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* Sat Oct 9 11:17:11 1993, faith@cs.unc.edu: make exit status conform
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* to that required by fsutil
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*
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* Mon Jan 3 11:06:52 1994 - Dr. Wettstein (greg%wind.uucp@plains.nodak.edu)
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* Added support for file system valid flag. Also
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* added program_version variable and output of
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* program name and version number when program
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* is executed.
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*
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* 30.10.94 - added support for v2 filesystem
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* (Andreas Schwab, schwab@issan.informatik.uni-dortmund.de)
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*
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* 10.12.94 - added test to prevent checking of mounted fs adapted
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* from Theodore Ts'o's (tytso@athena.mit.edu) e2fsck
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* program. (Daniel Quinlan, quinlan@yggdrasil.com)
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*
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* 01.07.96 - Fixed the v2 fs stuff to use the right #defines and such
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* for modern libcs (janl@math.uio.no, Nicolai Langfeldt)
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*
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* 02.07.96 - Added C bit fiddling routines from rmk@ecs.soton.ac.uk
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* (Russell King). He made them for ARM. It would seem
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* that the ARM is powerful enough to do this in C whereas
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* i386 and m64k must use assembly to get it fast >:-)
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* This should make minix fsck systemindependent.
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* (janl@math.uio.no, Nicolai Langfeldt)
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*
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* 04.11.96 - Added minor fixes from Andreas Schwab to avoid compiler
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* warnings. Added mc68k bitops from
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* Joerg Dorchain <dorchain@mpi-sb.mpg.de>.
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*
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* 06.11.96 - Added v2 code submitted by Joerg Dorchain, but written by
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* Andreas Schwab.
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*
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* 1999-02-22 Arkadiusz Mi<4D>kiewicz <misiek@misiek.eu.org>
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* - added Native Language Support
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*
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*
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* I've had no time to add comments - hopefully the function names
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* are comments enough. As with all file system checkers, this assumes
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* the file system is quiescent - don't use it on a mounted device
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* unless you can be sure nobody is writing to it (and remember that the
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* kernel can write to it when it searches for files).
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*
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* Usuage: fsck [-larvsm] device
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* -l for a listing of all the filenames
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* -a for automatic repairs (not implemented)
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* -r for repairs (interactive) (not implemented)
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* -v for verbose (tells how many files)
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* -s for super-block info
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* -m for minix-like "mode not cleared" warnings
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* -f force filesystem check even if filesystem marked as valid
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*
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* The device may be a block device or a image of one, but this isn't
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* enforced (but it's not much fun on a character device :-).
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*/
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#include "internal.h"
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#include <stdio.h>
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#include <errno.h>
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#include <unistd.h>
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#include <string.h>
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#include <fcntl.h>
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#include <ctype.h>
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#include <stdlib.h>
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#include <termios.h>
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#include <mntent.h>
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#include <sys/stat.h>
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#include <linux/fs.h>
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#include <linux/minix_fs.h>
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#ifdef MINIX2_SUPER_MAGIC2
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#define HAVE_MINIX2 1
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#endif
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#ifndef __linux__
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#define volatile
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#endif
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#define ROOT_INO 1
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#define UPPER(size,n) ((size+((n)-1))/(n))
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#define INODE_SIZE (sizeof(struct minix_inode))
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#ifdef HAVE_MINIX2
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#define INODE_SIZE2 (sizeof(struct minix2_inode))
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#define INODE_BLOCKS UPPER(INODES, (version2 ? MINIX2_INODES_PER_BLOCK \
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: MINIX_INODES_PER_BLOCK))
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#else
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#define INODE_BLOCKS UPPER(INODES, (MINIX_INODES_PER_BLOCK))
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#endif
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#define INODE_BUFFER_SIZE (INODE_BLOCKS * BLOCK_SIZE)
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#define BITS_PER_BLOCK (BLOCK_SIZE<<3)
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static char * program_name = "fsck.minix";
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static char * program_version = "1.2 - 11/11/96";
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static char * device_name = NULL;
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static int IN;
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static int repair=0, automatic=0, verbose=0, list=0, show=0, warn_mode=0,
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force=0;
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static int directory=0, regular=0, blockdev=0, chardev=0, links=0,
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symlinks=0, total=0;
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static int changed = 0; /* flags if the filesystem has been changed */
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static int errors_uncorrected = 0; /* flag if some error was not corrected */
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static int dirsize = 16;
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static int namelen = 14;
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static int version2 = 0;
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static struct termios termios;
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static int termios_set = 0;
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/* File-name data */
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#define MAX_DEPTH 50
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static int name_depth = 0;
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static char name_list[MAX_DEPTH][NAME_MAX+1];
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static char * inode_buffer = NULL;
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#define Inode (((struct minix_inode *) inode_buffer)-1)
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#define Inode2 (((struct minix2_inode *) inode_buffer)-1)
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static char super_block_buffer[BLOCK_SIZE];
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#define Super (*(struct minix_super_block *)super_block_buffer)
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#define INODES ((unsigned long)Super.s_ninodes)
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#ifdef HAVE_MINIX2
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#define ZONES ((unsigned long)(version2 ? Super.s_zones : Super.s_nzones))
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#else
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#define ZONES ((unsigned long)(Super.s_nzones))
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#endif
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#define IMAPS ((unsigned long)Super.s_imap_blocks)
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#define ZMAPS ((unsigned long)Super.s_zmap_blocks)
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#define FIRSTZONE ((unsigned long)Super.s_firstdatazone)
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#define ZONESIZE ((unsigned long)Super.s_log_zone_size)
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#define MAXSIZE ((unsigned long)Super.s_max_size)
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#define MAGIC (Super.s_magic)
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#define NORM_FIRSTZONE (2+IMAPS+ZMAPS+INODE_BLOCKS)
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static char *inode_map;
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static char *zone_map;
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static unsigned char * inode_count = NULL;
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static unsigned char * zone_count = NULL;
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static void recursive_check(unsigned int ino);
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static void recursive_check2(unsigned int ino);
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#define inode_in_use(x) (bit(inode_map,(x)))
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#define zone_in_use(x) (bit(zone_map,(x)-FIRSTZONE+1))
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#define mark_inode(x) (setbit(inode_map,(x)),changed=1)
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#define unmark_inode(x) (clrbit(inode_map,(x)),changed=1)
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#define mark_zone(x) (setbit(zone_map,(x)-FIRSTZONE+1),changed=1)
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#define unmark_zone(x) (clrbit(zone_map,(x)-FIRSTZONE+1),changed=1)
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static void leave(int) __attribute__ ((noreturn));
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static void leave(int status)
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{
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if (termios_set)
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tcsetattr(0, TCSANOW, &termios);
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exit(status);
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}
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static void show_usage(void) {
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fprintf(stderr, "BusyBox v%s (%s) multi-call binary -- GPL2\n\n", BB_VER, BB_BT);
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fprintf(stderr, "Usage: %s [-larvsmf] /dev/name\n\n", program_name);
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fprintf(stderr, "Performs a consistency check for MINIX filesystems.\n\n");
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fprintf(stderr, "OPTIONS:\n");
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fprintf(stderr, "\t-l\tLists all filenames\n");
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fprintf(stderr, "\t-r\tPerform interactive repairs\n");
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fprintf(stderr, "\t-a\tPerform automatic repairs\n");
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fprintf(stderr, "\t-v\tverbose\n");
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fprintf(stderr, "\t-s\tOutputs super-block information\n");
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fprintf(stderr, "\t-m\tActivates MINIX-like \"mode not cleared\" warnings\n");
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fprintf(stderr, "\t-f\tForce file system check.\n\n");
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leave(16);
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}
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static void die(const char *str) {
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fprintf(stderr, "%s: %s\n", program_name, str);
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leave(8);
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}
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/*
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* This simply goes through the file-name data and prints out the
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* current file.
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*/
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static void print_current_name(void)
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{
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int i=0;
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while (i<name_depth)
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printf("/%.*s",namelen,name_list[i++]);
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if (i == 0)
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printf ("/");
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}
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static int ask(const char * string, int def)
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{
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int c;
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if (!repair) {
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printf("\n");
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errors_uncorrected = 1;
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return 0;
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}
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if (automatic) {
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printf("\n");
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if (!def)
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errors_uncorrected = 1;
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return def;
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}
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printf(def?"%s (y/n)? ":"%s (n/y)? ",string);
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for (;;) {
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fflush(stdout);
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if ((c=getchar())==EOF) {
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if (!def)
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errors_uncorrected = 1;
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return def;
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}
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c=toupper(c);
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if (c == 'Y') {
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def = 1;
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break;
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} else if (c == 'N') {
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def = 0;
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break;
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} else if (c == ' ' || c == '\n')
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break;
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}
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if (def)
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printf("y\n");
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else {
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printf("n\n");
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errors_uncorrected = 1;
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}
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return def;
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}
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/*
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* Make certain that we aren't checking a filesystem that is on a
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* mounted partition. Code adapted from e2fsck, Copyright (C) 1993,
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* 1994 Theodore Ts'o. Also licensed under GPL.
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*/
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static void check_mount(void)
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{
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FILE * f;
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struct mntent * mnt;
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int cont;
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int fd;
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if ((f = setmntent (MOUNTED, "r")) == NULL)
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return;
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while ((mnt = getmntent (f)) != NULL)
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if (strcmp (device_name, mnt->mnt_fsname) == 0)
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break;
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endmntent (f);
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if (!mnt)
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return;
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/*
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* If the root is mounted read-only, then /etc/mtab is
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* probably not correct; so we won't issue a warning based on
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* it.
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*/
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fd = open(MOUNTED, O_RDWR);
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if (fd < 0 && errno == EROFS)
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return;
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else
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close(fd);
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printf ("%s is mounted. ", device_name);
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if (isatty(0) && isatty(1))
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cont = ask("Do you really want to continue", 0);
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else
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cont = 0;
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if (!cont) {
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printf ("check aborted.\n");
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exit (0);
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}
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return;
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}
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/*
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* check_zone_nr checks to see that *nr is a valid zone nr. If it
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* isn't, it will possibly be repaired. Check_zone_nr sets *corrected
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* if an error was corrected, and returns the zone (0 for no zone
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* or a bad zone-number).
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*/
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static int check_zone_nr(unsigned short * nr, int * corrected)
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{
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if (!*nr)
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return 0;
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if (*nr < FIRSTZONE)
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printf("Zone nr < FIRSTZONE in file `");
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else if (*nr >= ZONES)
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printf("Zone nr >= ZONES in file `");
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else
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return *nr;
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print_current_name();
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printf("'.");
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if (ask("Remove block",1)) {
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*nr = 0;
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*corrected = 1;
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}
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return 0;
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}
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#ifdef HAVE_MINIX2
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static int check_zone_nr2 (unsigned int *nr, int *corrected)
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{
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if (!*nr)
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return 0;
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if (*nr < FIRSTZONE)
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printf ("Zone nr < FIRSTZONE in file `");
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else if (*nr >= ZONES)
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printf ("Zone nr >= ZONES in file `");
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else
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return *nr;
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print_current_name ();
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printf ("'.");
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if (ask ("Remove block", 1)) {
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*nr = 0;
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*corrected = 1;
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}
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return 0;
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}
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#endif
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/*
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* read-block reads block nr into the buffer at addr.
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*/
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static void read_block(unsigned int nr, char * addr)
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{
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if (!nr) {
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memset(addr,0,BLOCK_SIZE);
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return;
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}
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if (BLOCK_SIZE*nr != lseek(IN, BLOCK_SIZE*nr, SEEK_SET)) {
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printf("Read error: unable to seek to block in file '");
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print_current_name();
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printf("'\n");
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memset(addr,0,BLOCK_SIZE);
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errors_uncorrected = 1;
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} else if (BLOCK_SIZE != read(IN, addr, BLOCK_SIZE)) {
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printf("Read error: bad block in file '");
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print_current_name();
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printf("'\n");
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memset(addr,0,BLOCK_SIZE);
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errors_uncorrected = 1;
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}
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}
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/*
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* write_block writes block nr to disk.
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*/
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static void write_block(unsigned int nr, char * addr)
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{
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if (!nr)
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return;
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if (nr < FIRSTZONE || nr >= ZONES) {
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printf("Internal error: trying to write bad block\n"
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"Write request ignored\n");
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errors_uncorrected = 1;
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return;
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}
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if (BLOCK_SIZE*nr != lseek(IN, BLOCK_SIZE*nr, SEEK_SET))
|
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die("seek failed in write_block");
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if (BLOCK_SIZE != write(IN, addr, BLOCK_SIZE)) {
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printf("Write error: bad block in file '");
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print_current_name();
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printf("'\n");
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errors_uncorrected = 1;
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}
|
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}
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|
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/*
|
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* map-block calculates the absolute block nr of a block in a file.
|
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* It sets 'changed' if the inode has needed changing, and re-writes
|
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* any indirect blocks with errors.
|
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*/
|
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static int map_block(struct minix_inode * inode, unsigned int blknr)
|
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{
|
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unsigned short ind[BLOCK_SIZE>>1];
|
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unsigned short dind[BLOCK_SIZE>>1];
|
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int blk_chg, block, result;
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|
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if (blknr<7)
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return check_zone_nr(inode->i_zone + blknr, &changed);
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blknr -= 7;
|
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if (blknr<512) {
|
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block = check_zone_nr(inode->i_zone + 7, &changed);
|
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read_block(block, (char *) ind);
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blk_chg = 0;
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result = check_zone_nr(blknr + ind, &blk_chg);
|
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if (blk_chg)
|
||
write_block(block, (char *) ind);
|
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return result;
|
||
}
|
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blknr -= 512;
|
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block = check_zone_nr(inode->i_zone + 8, &changed);
|
||
read_block(block, (char *) dind);
|
||
blk_chg = 0;
|
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result = check_zone_nr(dind + (blknr/512), &blk_chg);
|
||
if (blk_chg)
|
||
write_block(block, (char *) dind);
|
||
block = result;
|
||
read_block(block, (char *) ind);
|
||
blk_chg = 0;
|
||
result = check_zone_nr(ind + (blknr%512), &blk_chg);
|
||
if (blk_chg)
|
||
write_block(block, (char *) ind);
|
||
return result;
|
||
}
|
||
|
||
#ifdef HAVE_MINIX2
|
||
static int map_block2 (struct minix2_inode *inode, unsigned int blknr)
|
||
{
|
||
unsigned int ind[BLOCK_SIZE >> 2];
|
||
unsigned int dind[BLOCK_SIZE >> 2];
|
||
unsigned int tind[BLOCK_SIZE >> 2];
|
||
int blk_chg, block, result;
|
||
|
||
if (blknr < 7)
|
||
return check_zone_nr2 (inode->i_zone + blknr, &changed);
|
||
blknr -= 7;
|
||
if (blknr < 256) {
|
||
block = check_zone_nr2 (inode->i_zone + 7, &changed);
|
||
read_block (block, (char *) ind);
|
||
blk_chg = 0;
|
||
result = check_zone_nr2 (blknr + ind, &blk_chg);
|
||
if (blk_chg)
|
||
write_block (block, (char *) ind);
|
||
return result;
|
||
}
|
||
blknr -= 256;
|
||
if (blknr >= 256 * 256) {
|
||
block = check_zone_nr2 (inode->i_zone + 8, &changed);
|
||
read_block (block, (char *) dind);
|
||
blk_chg = 0;
|
||
result = check_zone_nr2 (dind + blknr / 256, &blk_chg);
|
||
if (blk_chg)
|
||
write_block (block, (char *) dind);
|
||
block = result;
|
||
read_block (block, (char *) ind);
|
||
blk_chg = 0;
|
||
result = check_zone_nr2 (ind + blknr % 256, &blk_chg);
|
||
if (blk_chg)
|
||
write_block (block, (char *) ind);
|
||
return result;
|
||
}
|
||
blknr -= 256 * 256;
|
||
block = check_zone_nr2 (inode->i_zone + 9, &changed);
|
||
read_block (block, (char *) tind);
|
||
blk_chg = 0;
|
||
result = check_zone_nr2 (tind + blknr / (256 * 256), &blk_chg);
|
||
if (blk_chg)
|
||
write_block (block, (char *) tind);
|
||
block = result;
|
||
read_block (block, (char *) dind);
|
||
blk_chg = 0;
|
||
result = check_zone_nr2 (dind + (blknr / 256) % 256, &blk_chg);
|
||
if (blk_chg)
|
||
write_block (block, (char *) dind);
|
||
block = result;
|
||
read_block (block, (char *) ind);
|
||
blk_chg = 0;
|
||
result = check_zone_nr2 (ind + blknr % 256, &blk_chg);
|
||
if (blk_chg)
|
||
write_block (block, (char *) ind);
|
||
return result;
|
||
}
|
||
#endif
|
||
|
||
static void write_super_block(void)
|
||
{
|
||
/*
|
||
* Set the state of the filesystem based on whether or not there
|
||
* are uncorrected errors. The filesystem valid flag is
|
||
* unconditionally set if we get this far.
|
||
*/
|
||
Super.s_state |= MINIX_VALID_FS;
|
||
if ( errors_uncorrected )
|
||
Super.s_state |= MINIX_ERROR_FS;
|
||
else
|
||
Super.s_state &= ~MINIX_ERROR_FS;
|
||
|
||
if (BLOCK_SIZE != lseek(IN, BLOCK_SIZE, SEEK_SET))
|
||
die("seek failed in write_super_block");
|
||
if (BLOCK_SIZE != write(IN, super_block_buffer, BLOCK_SIZE))
|
||
die("unable to write super-block");
|
||
|
||
return;
|
||
}
|
||
|
||
static void write_tables(void)
|
||
{
|
||
write_super_block();
|
||
|
||
if (IMAPS*BLOCK_SIZE != write(IN,inode_map,IMAPS*BLOCK_SIZE))
|
||
die("Unable to write inode map");
|
||
if (ZMAPS*BLOCK_SIZE != write(IN,zone_map,ZMAPS*BLOCK_SIZE))
|
||
die("Unable to write zone map");
|
||
if (INODE_BUFFER_SIZE != write(IN,inode_buffer,INODE_BUFFER_SIZE))
|
||
die("Unable to write inodes");
|
||
}
|
||
|
||
static void get_dirsize (void)
|
||
{
|
||
int block;
|
||
char blk[BLOCK_SIZE];
|
||
int size;
|
||
|
||
#if HAVE_MINIX2
|
||
if (version2)
|
||
block = Inode2[ROOT_INO].i_zone[0];
|
||
else
|
||
#endif
|
||
block = Inode[ROOT_INO].i_zone[0];
|
||
read_block (block, blk);
|
||
for (size = 16; size < BLOCK_SIZE; size <<= 1) {
|
||
if (strcmp (blk + size + 2, "..") == 0) {
|
||
dirsize = size;
|
||
namelen = size - 2;
|
||
return;
|
||
}
|
||
}
|
||
/* use defaults */
|
||
}
|
||
|
||
static void read_superblock(void)
|
||
{
|
||
if (BLOCK_SIZE != lseek(IN, BLOCK_SIZE, SEEK_SET))
|
||
die("seek failed");
|
||
if (BLOCK_SIZE != read(IN, super_block_buffer, BLOCK_SIZE))
|
||
die("unable to read super block");
|
||
if (MAGIC == MINIX_SUPER_MAGIC) {
|
||
namelen = 14;
|
||
dirsize = 16;
|
||
version2 = 0;
|
||
} else if (MAGIC == MINIX_SUPER_MAGIC2) {
|
||
namelen = 30;
|
||
dirsize = 32;
|
||
version2 = 0;
|
||
#ifdef HAVE_MINIX2
|
||
} else if (MAGIC == MINIX2_SUPER_MAGIC) {
|
||
namelen = 14;
|
||
dirsize = 16;
|
||
version2 = 1;
|
||
} else if (MAGIC == MINIX2_SUPER_MAGIC2) {
|
||
namelen = 30;
|
||
dirsize = 32;
|
||
version2 = 1;
|
||
#endif
|
||
} else
|
||
die("bad magic number in super-block");
|
||
if (ZONESIZE != 0 || BLOCK_SIZE != 1024)
|
||
die("Only 1k blocks/zones supported");
|
||
if (IMAPS * BLOCK_SIZE * 8 < INODES + 1)
|
||
die("bad s_imap_blocks field in super-block");
|
||
if (ZMAPS * BLOCK_SIZE * 8 < ZONES - FIRSTZONE + 1)
|
||
die("bad s_zmap_blocks field in super-block");
|
||
}
|
||
|
||
static void read_tables(void)
|
||
{
|
||
inode_map = malloc(IMAPS * BLOCK_SIZE);
|
||
if (!inode_map)
|
||
die("Unable to allocate buffer for inode map");
|
||
zone_map = malloc(ZMAPS * BLOCK_SIZE);
|
||
if (!inode_map)
|
||
die("Unable to allocate buffer for zone map");
|
||
memset(inode_map,0,sizeof(inode_map));
|
||
memset(zone_map,0,sizeof(zone_map));
|
||
inode_buffer = malloc(INODE_BUFFER_SIZE);
|
||
if (!inode_buffer)
|
||
die("Unable to allocate buffer for inodes");
|
||
inode_count = malloc(INODES + 1);
|
||
if (!inode_count)
|
||
die("Unable to allocate buffer for inode count");
|
||
zone_count = malloc(ZONES);
|
||
if (!zone_count)
|
||
die("Unable to allocate buffer for zone count");
|
||
if (IMAPS*BLOCK_SIZE != read(IN,inode_map,IMAPS*BLOCK_SIZE))
|
||
die("Unable to read inode map");
|
||
if (ZMAPS*BLOCK_SIZE != read(IN,zone_map,ZMAPS*BLOCK_SIZE))
|
||
die("Unable to read zone map");
|
||
if (INODE_BUFFER_SIZE != read(IN,inode_buffer,INODE_BUFFER_SIZE))
|
||
die("Unable to read inodes");
|
||
if (NORM_FIRSTZONE != FIRSTZONE) {
|
||
printf("Warning: Firstzone != Norm_firstzone\n");
|
||
errors_uncorrected = 1;
|
||
}
|
||
get_dirsize ();
|
||
if (show) {
|
||
printf("%ld inodes\n",INODES);
|
||
printf("%ld blocks\n",ZONES);
|
||
printf("Firstdatazone=%ld (%ld)\n",FIRSTZONE,NORM_FIRSTZONE);
|
||
printf("Zonesize=%d\n",BLOCK_SIZE<<ZONESIZE);
|
||
printf("Maxsize=%ld\n",MAXSIZE);
|
||
printf("Filesystem state=%d\n", Super.s_state);
|
||
printf("namelen=%d\n\n",namelen);
|
||
}
|
||
}
|
||
|
||
struct minix_inode * get_inode(unsigned int nr)
|
||
{
|
||
struct minix_inode * inode;
|
||
|
||
if (!nr || nr > INODES)
|
||
return NULL;
|
||
total++;
|
||
inode = Inode + nr;
|
||
if (!inode_count[nr]) {
|
||
if (!inode_in_use(nr)) {
|
||
printf("Inode %d marked not used, but used for file '",
|
||
nr);
|
||
print_current_name();
|
||
printf("'\n");
|
||
if (repair) {
|
||
if (ask("Mark in use",1))
|
||
mark_inode(nr);
|
||
} else {
|
||
errors_uncorrected = 1;
|
||
}
|
||
}
|
||
if (S_ISDIR(inode->i_mode))
|
||
directory++;
|
||
else if (S_ISREG(inode->i_mode))
|
||
regular++;
|
||
else if (S_ISCHR(inode->i_mode))
|
||
chardev++;
|
||
else if (S_ISBLK(inode->i_mode))
|
||
blockdev++;
|
||
else if (S_ISLNK(inode->i_mode))
|
||
symlinks++;
|
||
else if (S_ISSOCK(inode->i_mode))
|
||
;
|
||
else if (S_ISFIFO(inode->i_mode))
|
||
;
|
||
else {
|
||
print_current_name();
|
||
printf(" has mode %05o\n",inode->i_mode);
|
||
}
|
||
|
||
} else
|
||
links++;
|
||
if (!++inode_count[nr]) {
|
||
printf("Warning: inode count too big.\n");
|
||
inode_count[nr]--;
|
||
errors_uncorrected = 1;
|
||
}
|
||
return inode;
|
||
}
|
||
|
||
#ifdef HAVE_MINIX2
|
||
struct minix2_inode *
|
||
get_inode2 (unsigned int nr)
|
||
{
|
||
struct minix2_inode *inode;
|
||
|
||
if (!nr || nr > INODES)
|
||
return NULL;
|
||
total++;
|
||
inode = Inode2 + nr;
|
||
if (!inode_count[nr]) {
|
||
if (!inode_in_use (nr)) {
|
||
printf ("Inode %d marked not used, but used for file '", nr);
|
||
print_current_name ();
|
||
printf ("'\n");
|
||
if (repair) {
|
||
if (ask ("Mark in use", 1))
|
||
mark_inode (nr);
|
||
else
|
||
errors_uncorrected = 1;
|
||
}
|
||
}
|
||
if (S_ISDIR (inode->i_mode))
|
||
directory++;
|
||
else if (S_ISREG (inode->i_mode))
|
||
regular++;
|
||
else if (S_ISCHR (inode->i_mode))
|
||
chardev++;
|
||
else if (S_ISBLK (inode->i_mode))
|
||
blockdev++;
|
||
else if (S_ISLNK (inode->i_mode))
|
||
symlinks++;
|
||
else if (S_ISSOCK (inode->i_mode));
|
||
else if (S_ISFIFO (inode->i_mode));
|
||
else {
|
||
print_current_name ();
|
||
printf (" has mode %05o\n", inode->i_mode);
|
||
}
|
||
} else
|
||
links++;
|
||
if (!++inode_count[nr]) {
|
||
printf ("Warning: inode count too big.\n");
|
||
inode_count[nr]--;
|
||
errors_uncorrected = 1;
|
||
}
|
||
return inode;
|
||
}
|
||
#endif
|
||
|
||
static void check_root(void)
|
||
{
|
||
struct minix_inode * inode = Inode + ROOT_INO;
|
||
|
||
if (!inode || !S_ISDIR(inode->i_mode))
|
||
die("root inode isn't a directory");
|
||
}
|
||
|
||
#ifdef HAVE_MINIX2
|
||
static void check_root2 (void)
|
||
{
|
||
struct minix2_inode *inode = Inode2 + ROOT_INO;
|
||
|
||
if (!inode || !S_ISDIR (inode->i_mode))
|
||
die ("root inode isn't a directory");
|
||
}
|
||
#endif
|
||
|
||
static int add_zone(unsigned short * znr, int * corrected)
|
||
{
|
||
int result;
|
||
int block;
|
||
|
||
result = 0;
|
||
block = check_zone_nr(znr, corrected);
|
||
if (!block)
|
||
return 0;
|
||
if (zone_count[block]) {
|
||
printf("Block has been used before. Now in file `");
|
||
print_current_name();
|
||
printf("'.");
|
||
if (ask("Clear",1)) {
|
||
*znr = 0;
|
||
block = 0;
|
||
*corrected = 1;
|
||
}
|
||
}
|
||
if (!block)
|
||
return 0;
|
||
if (!zone_in_use(block)) {
|
||
printf("Block %d in file `",block);
|
||
print_current_name();
|
||
printf("' is marked not in use.");
|
||
if (ask("Correct",1))
|
||
mark_zone(block);
|
||
}
|
||
if (!++zone_count[block])
|
||
zone_count[block]--;
|
||
return block;
|
||
}
|
||
|
||
#ifdef HAVE_MINIX2
|
||
static int add_zone2 (unsigned int *znr, int *corrected)
|
||
{
|
||
int result;
|
||
int block;
|
||
|
||
result = 0;
|
||
block = check_zone_nr2 (znr, corrected);
|
||
if (!block)
|
||
return 0;
|
||
if (zone_count[block]) {
|
||
printf ("Block has been used before. Now in file `");
|
||
print_current_name ();
|
||
printf ("'.");
|
||
if (ask ("Clear", 1)) {
|
||
*znr = 0;
|
||
block = 0;
|
||
*corrected = 1;
|
||
}
|
||
}
|
||
if (!block)
|
||
return 0;
|
||
if (!zone_in_use (block)) {
|
||
printf ("Block %d in file `", block);
|
||
print_current_name ();
|
||
printf ("' is marked not in use.");
|
||
if (ask ("Correct", 1))
|
||
mark_zone (block);
|
||
}
|
||
if (!++zone_count[block])
|
||
zone_count[block]--;
|
||
return block;
|
||
}
|
||
#endif
|
||
|
||
static void add_zone_ind(unsigned short * znr, int * corrected)
|
||
{
|
||
static char blk[BLOCK_SIZE];
|
||
int i, chg_blk=0;
|
||
int block;
|
||
|
||
block = add_zone(znr, corrected);
|
||
if (!block)
|
||
return;
|
||
read_block(block, blk);
|
||
for (i=0 ; i < (BLOCK_SIZE>>1) ; i++)
|
||
add_zone(i + (unsigned short *) blk, &chg_blk);
|
||
if (chg_blk)
|
||
write_block(block, blk);
|
||
}
|
||
|
||
#ifdef HAVE_MINIX2
|
||
static void
|
||
add_zone_ind2 (unsigned int *znr, int *corrected)
|
||
{
|
||
static char blk[BLOCK_SIZE];
|
||
int i, chg_blk = 0;
|
||
int block;
|
||
|
||
block = add_zone2 (znr, corrected);
|
||
if (!block)
|
||
return;
|
||
read_block (block, blk);
|
||
for (i = 0; i < BLOCK_SIZE >> 2; i++)
|
||
add_zone2 (i + (unsigned int *) blk, &chg_blk);
|
||
if (chg_blk)
|
||
write_block (block, blk);
|
||
}
|
||
#endif
|
||
|
||
static void add_zone_dind(unsigned short * znr, int * corrected)
|
||
{
|
||
static char blk[BLOCK_SIZE];
|
||
int i, blk_chg=0;
|
||
int block;
|
||
|
||
block = add_zone(znr, corrected);
|
||
if (!block)
|
||
return;
|
||
read_block(block, blk);
|
||
for (i=0 ; i < (BLOCK_SIZE>>1) ; i++)
|
||
add_zone_ind(i + (unsigned short *) blk, &blk_chg);
|
||
if (blk_chg)
|
||
write_block(block, blk);
|
||
}
|
||
|
||
#ifdef HAVE_MINIX2
|
||
static void
|
||
add_zone_dind2 (unsigned int *znr, int *corrected)
|
||
{
|
||
static char blk[BLOCK_SIZE];
|
||
int i, blk_chg = 0;
|
||
int block;
|
||
|
||
block = add_zone2 (znr, corrected);
|
||
if (!block)
|
||
return;
|
||
read_block (block, blk);
|
||
for (i = 0; i < BLOCK_SIZE >> 2; i++)
|
||
add_zone_ind2 (i + (unsigned int *) blk, &blk_chg);
|
||
if (blk_chg)
|
||
write_block (block, blk);
|
||
}
|
||
|
||
static void
|
||
add_zone_tind2 (unsigned int *znr, int *corrected)
|
||
{
|
||
static char blk[BLOCK_SIZE];
|
||
int i, blk_chg = 0;
|
||
int block;
|
||
|
||
block = add_zone2 (znr, corrected);
|
||
if (!block)
|
||
return;
|
||
read_block (block, blk);
|
||
for (i = 0; i < BLOCK_SIZE >> 2; i++)
|
||
add_zone_dind2 (i + (unsigned int *) blk, &blk_chg);
|
||
if (blk_chg)
|
||
write_block (block, blk);
|
||
}
|
||
#endif
|
||
|
||
static void check_zones(unsigned int i)
|
||
{
|
||
struct minix_inode * inode;
|
||
|
||
if (!i || i > INODES)
|
||
return;
|
||
if (inode_count[i] > 1) /* have we counted this file already? */
|
||
return;
|
||
inode = Inode + i;
|
||
if (!S_ISDIR(inode->i_mode) && !S_ISREG(inode->i_mode) &&
|
||
!S_ISLNK(inode->i_mode))
|
||
return;
|
||
for (i=0 ; i<7 ; i++)
|
||
add_zone(i + inode->i_zone, &changed);
|
||
add_zone_ind(7 + inode->i_zone, &changed);
|
||
add_zone_dind(8 + inode->i_zone, &changed);
|
||
}
|
||
|
||
#ifdef HAVE_MINIX2
|
||
static void
|
||
check_zones2 (unsigned int i)
|
||
{
|
||
struct minix2_inode *inode;
|
||
|
||
if (!i || i > INODES)
|
||
return;
|
||
if (inode_count[i] > 1) /* have we counted this file already? */
|
||
return;
|
||
inode = Inode2 + i;
|
||
if (!S_ISDIR (inode->i_mode) && !S_ISREG (inode->i_mode)
|
||
&& !S_ISLNK (inode->i_mode))
|
||
return;
|
||
for (i = 0; i < 7; i++)
|
||
add_zone2 (i + inode->i_zone, &changed);
|
||
add_zone_ind2 (7 + inode->i_zone, &changed);
|
||
add_zone_dind2 (8 + inode->i_zone, &changed);
|
||
add_zone_tind2 (9 + inode->i_zone, &changed);
|
||
}
|
||
#endif
|
||
|
||
static void check_file(struct minix_inode * dir, unsigned int offset)
|
||
{
|
||
static char blk[BLOCK_SIZE];
|
||
struct minix_inode * inode;
|
||
int ino;
|
||
char * name;
|
||
int block;
|
||
|
||
block = map_block(dir,offset/BLOCK_SIZE);
|
||
read_block(block, blk);
|
||
name = blk + (offset % BLOCK_SIZE) + 2;
|
||
ino = * (unsigned short *) (name-2);
|
||
if (ino > INODES) {
|
||
print_current_name();
|
||
printf(" contains a bad inode number for file '");
|
||
printf("%.*s'.",namelen,name);
|
||
if (ask(" Remove",1)) {
|
||
*(unsigned short *)(name-2) = 0;
|
||
write_block(block, blk);
|
||
}
|
||
ino = 0;
|
||
}
|
||
if (name_depth < MAX_DEPTH)
|
||
strncpy (name_list[name_depth], name, namelen);
|
||
name_depth++;
|
||
inode = get_inode(ino);
|
||
name_depth--;
|
||
if (!offset) {
|
||
if (!inode || strcmp(".",name)) {
|
||
print_current_name();
|
||
printf(": bad directory: '.' isn't first\n");
|
||
errors_uncorrected = 1;
|
||
} else return;
|
||
}
|
||
if (offset == dirsize) {
|
||
if (!inode || strcmp("..",name)) {
|
||
print_current_name();
|
||
printf(": bad directory: '..' isn't second\n");
|
||
errors_uncorrected = 1;
|
||
} else return;
|
||
}
|
||
if (!inode)
|
||
return;
|
||
if (name_depth < MAX_DEPTH)
|
||
strncpy(name_list[name_depth],name,namelen);
|
||
name_depth++;
|
||
if (list) {
|
||
if (verbose)
|
||
printf("%6d %07o %3d ",ino,inode->i_mode,inode->i_nlinks);
|
||
print_current_name();
|
||
if (S_ISDIR(inode->i_mode))
|
||
printf(":\n");
|
||
else
|
||
printf("\n");
|
||
}
|
||
check_zones(ino);
|
||
if (inode && S_ISDIR(inode->i_mode))
|
||
recursive_check(ino);
|
||
name_depth--;
|
||
return;
|
||
}
|
||
|
||
#ifdef HAVE_MINIX2
|
||
static void
|
||
check_file2 (struct minix2_inode *dir, unsigned int offset)
|
||
{
|
||
static char blk[BLOCK_SIZE];
|
||
struct minix2_inode *inode;
|
||
int ino;
|
||
char *name;
|
||
int block;
|
||
|
||
block = map_block2 (dir, offset / BLOCK_SIZE);
|
||
read_block (block, blk);
|
||
name = blk + (offset % BLOCK_SIZE) + 2;
|
||
ino = *(unsigned short *) (name - 2);
|
||
if (ino > INODES) {
|
||
print_current_name ();
|
||
printf (" contains a bad inode number for file '");
|
||
printf ("%.*s'.", namelen, name);
|
||
if (ask (" Remove", 1)) {
|
||
*(unsigned short *) (name - 2) = 0;
|
||
write_block (block, blk);
|
||
}
|
||
ino = 0;
|
||
}
|
||
if (name_depth < MAX_DEPTH)
|
||
strncpy (name_list[name_depth], name, namelen);
|
||
name_depth++;
|
||
inode = get_inode2 (ino);
|
||
name_depth--;
|
||
if (!offset) {
|
||
if (!inode || strcmp (".", name)) {
|
||
print_current_name ();
|
||
printf (": bad directory: '.' isn't first\n");
|
||
errors_uncorrected = 1;
|
||
} else
|
||
return;
|
||
}
|
||
if (offset == dirsize) {
|
||
if (!inode || strcmp ("..", name)) {
|
||
print_current_name ();
|
||
printf (": bad directory: '..' isn't second\n");
|
||
errors_uncorrected = 1;
|
||
} else
|
||
return;
|
||
}
|
||
if (!inode)
|
||
return;
|
||
name_depth++;
|
||
if (list) {
|
||
if (verbose)
|
||
printf ("%6d %07o %3d ", ino, inode->i_mode, inode->i_nlinks);
|
||
print_current_name ();
|
||
if (S_ISDIR (inode->i_mode))
|
||
printf (":\n");
|
||
else
|
||
printf ("\n");
|
||
}
|
||
check_zones2 (ino);
|
||
if (inode && S_ISDIR (inode->i_mode))
|
||
recursive_check2 (ino);
|
||
name_depth--;
|
||
return;
|
||
}
|
||
#endif
|
||
|
||
static void recursive_check(unsigned int ino)
|
||
{
|
||
struct minix_inode * dir;
|
||
unsigned int offset;
|
||
|
||
dir = Inode + ino;
|
||
if (!S_ISDIR(dir->i_mode))
|
||
die("internal error");
|
||
if (dir->i_size < 2 * dirsize) {
|
||
print_current_name();
|
||
printf(": bad directory: size<32");
|
||
errors_uncorrected = 1;
|
||
}
|
||
for (offset = 0 ; offset < dir->i_size ; offset += dirsize)
|
||
check_file(dir,offset);
|
||
}
|
||
|
||
#ifdef HAVE_MINIX2
|
||
static void
|
||
recursive_check2 (unsigned int ino)
|
||
{
|
||
struct minix2_inode *dir;
|
||
unsigned int offset;
|
||
|
||
dir = Inode2 + ino;
|
||
if (!S_ISDIR (dir->i_mode))
|
||
die ("internal error");
|
||
if (dir->i_size < 2 * dirsize) {
|
||
print_current_name ();
|
||
printf (": bad directory: size < 32");
|
||
errors_uncorrected = 1;
|
||
}
|
||
for (offset = 0; offset < dir->i_size; offset += dirsize)
|
||
check_file2 (dir, offset);
|
||
}
|
||
#endif
|
||
|
||
static int bad_zone(int i)
|
||
{
|
||
char buffer[1024];
|
||
|
||
if (BLOCK_SIZE*i != lseek(IN, BLOCK_SIZE*i, SEEK_SET))
|
||
die("seek failed in bad_zone");
|
||
return (BLOCK_SIZE != read(IN, buffer, BLOCK_SIZE));
|
||
}
|
||
|
||
static void check_counts(void)
|
||
{
|
||
int i;
|
||
|
||
for (i=1 ; i <= INODES ; i++) {
|
||
if (!inode_in_use(i) && Inode[i].i_mode && warn_mode) {
|
||
printf("Inode %d mode not cleared.",i);
|
||
if (ask("Clear",1)) {
|
||
Inode[i].i_mode = 0;
|
||
changed = 1;
|
||
}
|
||
}
|
||
if (!inode_count[i]) {
|
||
if (!inode_in_use(i))
|
||
continue;
|
||
printf("Inode %d not used, marked used in the bitmap.",i);
|
||
if (ask("Clear",1))
|
||
unmark_inode(i);
|
||
continue;
|
||
}
|
||
if (!inode_in_use(i)) {
|
||
printf("Inode %d used, marked unused in the bitmap.", i);
|
||
if (ask("Set",1))
|
||
mark_inode(i);
|
||
}
|
||
if (Inode[i].i_nlinks != inode_count[i]) {
|
||
printf("Inode %d (mode = %07o), i_nlinks=%d, counted=%d.",
|
||
i,Inode[i].i_mode,Inode[i].i_nlinks,inode_count[i]);
|
||
if (ask("Set i_nlinks to count",1)) {
|
||
Inode[i].i_nlinks=inode_count[i];
|
||
changed=1;
|
||
}
|
||
}
|
||
}
|
||
for (i=FIRSTZONE ; i < ZONES ; i++) {
|
||
if (zone_in_use(i) == zone_count[i])
|
||
continue;
|
||
if (!zone_count[i]) {
|
||
if (bad_zone(i))
|
||
continue;
|
||
printf("Zone %d: marked in use, no file uses it.",i);
|
||
if (ask("Unmark",1))
|
||
unmark_zone(i);
|
||
continue;
|
||
}
|
||
printf("Zone %d: %sin use, counted=%d\n",
|
||
i,zone_in_use(i)?"":"not ",zone_count[i]);
|
||
}
|
||
}
|
||
|
||
#ifdef HAVE_MINIX2
|
||
static void
|
||
check_counts2 (void)
|
||
{
|
||
int i;
|
||
|
||
for (i = 1; i <= INODES; i++) {
|
||
if (!inode_in_use (i) && Inode2[i].i_mode && warn_mode) {
|
||
printf ("Inode %d mode not cleared.", i);
|
||
if (ask ("Clear", 1)) {
|
||
Inode2[i].i_mode = 0;
|
||
changed = 1;
|
||
}
|
||
}
|
||
if (!inode_count[i]) {
|
||
if (!inode_in_use (i))
|
||
continue;
|
||
printf ("Inode %d not used, marked used in the bitmap.", i);
|
||
if (ask ("Clear", 1))
|
||
unmark_inode (i);
|
||
continue;
|
||
}
|
||
if (!inode_in_use (i)) {
|
||
printf ("Inode %d used, marked unused in the bitmap.", i);
|
||
if (ask ("Set", 1))
|
||
mark_inode (i);
|
||
}
|
||
if (Inode2[i].i_nlinks != inode_count[i]) {
|
||
printf ("Inode %d (mode = %07o), i_nlinks=%d, counted=%d.",
|
||
i, Inode2[i].i_mode, Inode2[i].i_nlinks, inode_count[i]);
|
||
if (ask ("Set i_nlinks to count", 1)) {
|
||
Inode2[i].i_nlinks = inode_count[i];
|
||
changed = 1;
|
||
}
|
||
}
|
||
}
|
||
for (i = FIRSTZONE; i < ZONES; i++) {
|
||
if (zone_in_use (i) == zone_count[i])
|
||
continue;
|
||
if (!zone_count[i]) {
|
||
if (bad_zone (i))
|
||
continue;
|
||
printf ("Zone %d: marked in use, no file uses it.", i);
|
||
if (ask ("Unmark", 1))
|
||
unmark_zone (i);
|
||
continue;
|
||
}
|
||
printf ("Zone %d: %sin use, counted=%d\n",
|
||
i, zone_in_use (i) ? "" : "not ", zone_count[i]);
|
||
}
|
||
}
|
||
#endif
|
||
|
||
static void check(void)
|
||
{
|
||
memset(inode_count,0,(INODES + 1) * sizeof(*inode_count));
|
||
memset(zone_count,0,ZONES*sizeof(*zone_count));
|
||
check_zones(ROOT_INO);
|
||
recursive_check(ROOT_INO);
|
||
check_counts();
|
||
}
|
||
|
||
#ifdef HAVE_MINIX2
|
||
static void
|
||
check2 (void)
|
||
{
|
||
memset (inode_count, 0, (INODES + 1) * sizeof (*inode_count));
|
||
memset (zone_count, 0, ZONES * sizeof (*zone_count));
|
||
check_zones2 (ROOT_INO);
|
||
recursive_check2 (ROOT_INO);
|
||
check_counts2 ();
|
||
}
|
||
#endif
|
||
|
||
extern int
|
||
fsck_minix_main(int argc, char ** argv)
|
||
{
|
||
struct termios tmp;
|
||
int count;
|
||
int retcode = 0;
|
||
|
||
if (argc && *argv)
|
||
program_name = *argv;
|
||
if (INODE_SIZE * MINIX_INODES_PER_BLOCK != BLOCK_SIZE)
|
||
die("bad inode size");
|
||
#ifdef HAVE_MINIX2
|
||
if (INODE_SIZE2 * MINIX2_INODES_PER_BLOCK != BLOCK_SIZE)
|
||
die("bad v2 inode size");
|
||
#endif
|
||
while (argc-- > 1) {
|
||
argv++;
|
||
if (argv[0][0] != '-') {
|
||
if (device_name)
|
||
show_usage();
|
||
else
|
||
device_name = argv[0];
|
||
} else while (*++argv[0])
|
||
switch (argv[0][0]) {
|
||
case 'l': list=1; break;
|
||
case 'a': automatic=1; repair=1; break;
|
||
case 'r': automatic=0; repair=1; break;
|
||
case 'v': verbose=1; break;
|
||
case 's': show=1; break;
|
||
case 'm': warn_mode=1; break;
|
||
case 'f': force=1; break;
|
||
default: show_usage();
|
||
}
|
||
}
|
||
if (!device_name)
|
||
show_usage();
|
||
check_mount(); /* trying to check a mounted filesystem? */
|
||
if (repair && !automatic) {
|
||
if (!isatty(0) || !isatty(1))
|
||
die("need terminal for interactive repairs");
|
||
}
|
||
IN = open(device_name,repair?O_RDWR:O_RDONLY);
|
||
if (IN < 0)
|
||
die("unable to open '%s'");
|
||
for (count=0 ; count<3 ; count++)
|
||
sync();
|
||
read_superblock();
|
||
|
||
/*
|
||
* Determine whether or not we should continue with the checking.
|
||
* This is based on the status of the filesystem valid and error
|
||
* flags and whether or not the -f switch was specified on the
|
||
* command line.
|
||
*/
|
||
printf("%s, %s\n", program_name, program_version);
|
||
if ( !(Super.s_state & MINIX_ERROR_FS) &&
|
||
(Super.s_state & MINIX_VALID_FS) &&
|
||
!force ) {
|
||
if (repair)
|
||
printf("%s is clean, no check.\n", device_name);
|
||
return retcode;
|
||
}
|
||
else if (force)
|
||
printf("Forcing filesystem check on %s.\n", device_name);
|
||
else if (repair)
|
||
printf("Filesystem on %s is dirty, needs checking.\n",\
|
||
device_name);
|
||
|
||
read_tables();
|
||
|
||
if (repair && !automatic) {
|
||
tcgetattr(0,&termios);
|
||
tmp = termios;
|
||
tmp.c_lflag &= ~(ICANON|ECHO);
|
||
tcsetattr(0,TCSANOW,&tmp);
|
||
termios_set = 1;
|
||
}
|
||
|
||
#if HAVE_MINIX2
|
||
if (version2) {
|
||
check_root2 ();
|
||
check2 ();
|
||
} else
|
||
#endif
|
||
{
|
||
check_root();
|
||
check();
|
||
}
|
||
if (verbose) {
|
||
int i, free;
|
||
|
||
for (i=1,free=0 ; i <= INODES ; i++)
|
||
if (!inode_in_use(i))
|
||
free++;
|
||
printf("\n%6ld inodes used (%ld%%)\n",(INODES-free),
|
||
100*(INODES-free)/INODES);
|
||
for (i=FIRSTZONE,free=0 ; i < ZONES ; i++)
|
||
if (!zone_in_use(i))
|
||
free++;
|
||
printf("%6ld zones used (%ld%%)\n",(ZONES-free),
|
||
100*(ZONES-free)/ZONES);
|
||
printf("\n%6d regular files\n"
|
||
"%6d directories\n"
|
||
"%6d character device files\n"
|
||
"%6d block device files\n"
|
||
"%6d links\n"
|
||
"%6d symbolic links\n"
|
||
"------\n"
|
||
"%6d files\n",
|
||
regular,directory,chardev,blockdev,
|
||
links-2*directory+1,symlinks,total-2*directory+1);
|
||
}
|
||
if (changed) {
|
||
write_tables();
|
||
printf( "----------------------------\n"
|
||
"FILE SYSTEM HAS BEEN CHANGED\n"
|
||
"----------------------------\n");
|
||
for (count=0 ; count<3 ; count++)
|
||
sync();
|
||
}
|
||
else if ( repair )
|
||
write_super_block();
|
||
|
||
if (repair && !automatic)
|
||
tcsetattr(0,TCSANOW,&termios);
|
||
|
||
if (changed)
|
||
retcode += 3;
|
||
if (errors_uncorrected)
|
||
retcode += 4;
|
||
return retcode;
|
||
}
|