863 lines
22 KiB
C
863 lines
22 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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* 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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* 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 <stdio.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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#ifndef __GNUC__
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#error "needs gcc for the bitop-__asm__'s"
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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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#define INODE_BLOCKS UPPER(INODES,MINIX_INODES_PER_BLOCK)
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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 = "1.0 - 12/30/93";
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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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/* 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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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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#define ZONES ((unsigned long)Super.s_nzones)
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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[BLOCK_SIZE * MINIX_I_MAP_SLOTS];
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static char zone_map[BLOCK_SIZE * MINIX_Z_MAP_SLOTS];
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static unsigned char * inode_count = NULL;
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static unsigned char * zone_count = NULL;
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void recursive_check(unsigned int ino);
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#define bitop(name,op) \
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static inline int name(char * addr,unsigned int nr) \
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{ \
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int __res; \
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__asm__ __volatile__("bt" op "l %1,%2; adcl $0,%0" \
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:"=g" (__res) \
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:"r" (nr),"m" (*(addr)),"0" (0)); \
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return __res; \
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}
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bitop(bit,"")
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bitop(setbit,"s")
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bitop(clrbit,"r")
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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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/*
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* Volatile to let gcc know that this doesn't return. When trying
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* to compile this under minix, volatile gives a warning, as
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* exit() isn't defined as volatile under minix.
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*/
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volatile void fatal_error(const char * fmt_string, int status)
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{
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fprintf(stderr,fmt_string,program_name,device_name);
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exit(status);
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}
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#define usage() fatal_error("Usage: %s [-larvsmf] /dev/name\n",16)
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#define die(str) fatal_error("%s: " str "\n",8)
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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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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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}
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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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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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/*
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* read-block reads block nr into the buffer at addr.
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*/
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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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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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* 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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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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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)
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write_block(block, (char *) ind);
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return result;
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}
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blknr -= 512;
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block = check_zone_nr(inode->i_zone + 8, &changed);
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read_block(block, (char *) dind);
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blk_chg = 0;
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result = check_zone_nr(dind + (blknr/512), &blk_chg);
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if (blk_chg)
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write_block(block, (char *) dind);
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block = result;
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read_block(block, (char *) ind);
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blk_chg = 0;
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result = check_zone_nr(ind + (blknr%512), &blk_chg);
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if (blk_chg)
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write_block(block, (char *) ind);
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return result;
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}
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void write_super_block(void)
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{
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/*
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* Set the state of the filesystem based on whether or not there
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* are uncorrected errors. The filesystem valid flag is
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* unconditionally set if we get this far.
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*/
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Super.s_state |= MINIX_VALID_FS;
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if ( errors_uncorrected )
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Super.s_state |= MINIX_ERROR_FS;
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else
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Super.s_state &= ~MINIX_ERROR_FS;
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if (BLOCK_SIZE != lseek(IN, BLOCK_SIZE, SEEK_SET))
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die("seek failed in write_super_block");
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if (BLOCK_SIZE != write(IN, super_block_buffer, BLOCK_SIZE))
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die("unable to write super-block");
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return;
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}
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void write_tables(void)
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{
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write_super_block();
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if (IMAPS*BLOCK_SIZE != write(IN,inode_map,IMAPS*BLOCK_SIZE))
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die("Unable to write inode map");
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if (ZMAPS*BLOCK_SIZE != write(IN,zone_map,ZMAPS*BLOCK_SIZE))
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die("Unable to write zone map");
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if (INODE_BUFFER_SIZE != write(IN,inode_buffer,INODE_BUFFER_SIZE))
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die("Unable to write inodes");
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}
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void read_tables(void)
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{
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memset(inode_map,0,sizeof(inode_map));
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memset(zone_map,0,sizeof(zone_map));
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if (BLOCK_SIZE != lseek(IN, BLOCK_SIZE, SEEK_SET))
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die("seek failed");
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if (BLOCK_SIZE != read(IN, super_block_buffer, BLOCK_SIZE))
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die("unable to read super block");
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if (MAGIC == MINIX_SUPER_MAGIC) {
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namelen = 14;
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dirsize = 16;
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} else if (MAGIC == MINIX_SUPER_MAGIC2) {
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namelen = 30;
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dirsize = 32;
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} else
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die("bad magic number in super-block");
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if (ZONESIZE != 0 || BLOCK_SIZE != 1024)
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die("Only 1k blocks/zones supported");
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if (!IMAPS || IMAPS > MINIX_I_MAP_SLOTS)
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die("bad s_imap_blocks field in super-block");
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if (!ZMAPS || ZMAPS > MINIX_Z_MAP_SLOTS)
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die("bad s_zmap_blocks field in super-block");
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inode_buffer = malloc(INODE_BUFFER_SIZE);
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if (!inode_buffer)
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die("Unable to allocate buffer for inodes");
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inode_count = malloc(INODES);
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if (!inode_count)
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die("Unable to allocate buffer for inode count");
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zone_count = malloc(ZONES);
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if (!zone_count)
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die("Unable to allocate buffer for zone count");
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if (IMAPS*BLOCK_SIZE != read(IN,inode_map,IMAPS*BLOCK_SIZE))
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die("Unable to read inode map");
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if (ZMAPS*BLOCK_SIZE != read(IN,zone_map,ZMAPS*BLOCK_SIZE))
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die("Unable to read zone map");
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if (INODE_BUFFER_SIZE != read(IN,inode_buffer,INODE_BUFFER_SIZE))
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die("Unable to read inodes");
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if (NORM_FIRSTZONE != FIRSTZONE) {
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printf("Warning: Firstzone != Norm_firstzone\n");
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errors_uncorrected = 1;
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}
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if (show) {
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printf("%d inodes\n",INODES);
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printf("%d blocks\n",ZONES);
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printf("Firstdatazone=%d (%d)\n",FIRSTZONE,NORM_FIRSTZONE);
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printf("Zonesize=%d\n",BLOCK_SIZE<<ZONESIZE);
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printf("Maxsize=%d\n",MAXSIZE);
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printf("Filesystem state=%d\n", Super.s_state);
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printf("namelen=%d\n\n",namelen);
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}
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}
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struct minix_inode * get_inode(unsigned int nr)
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{
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struct minix_inode * inode;
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if (!nr || nr >= INODES)
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return NULL;
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total++;
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inode = Inode + nr;
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if (!inode_count[nr]) {
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if (!inode_in_use(nr)) {
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printf("Inode %d marked not used, but used for file '",
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nr);
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print_current_name();
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printf("'\n");
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if (repair)
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if (ask("Mark in use",1))
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mark_inode(nr);
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else
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errors_uncorrected = 1;
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}
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if (S_ISDIR(inode->i_mode))
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directory++;
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else if (S_ISREG(inode->i_mode))
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regular++;
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else if (S_ISCHR(inode->i_mode))
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chardev++;
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else if (S_ISBLK(inode->i_mode))
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blockdev++;
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else if (S_ISLNK(inode->i_mode))
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symlinks++;
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else if (S_ISSOCK(inode->i_mode))
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;
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else if (S_ISFIFO(inode->i_mode))
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;
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else {
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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;
|
|
}
|
|
|
|
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");
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
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;
|
|
}
|
|
inode = get_inode(ino);
|
|
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;
|
|
}
|
|
|
|
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 < 32) {
|
|
print_current_name();
|
|
printf(": bad directory: size<32");
|
|
errors_uncorrected = 1;
|
|
}
|
|
for (offset = 0 ; offset < dir->i_size ; offset += dirsize)
|
|
check_file(dir,offset);
|
|
}
|
|
|
|
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));
|
|
}
|
|
|
|
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]);
|
|
}
|
|
}
|
|
|
|
void check(void)
|
|
{
|
|
memset(inode_count,0,INODES*sizeof(*inode_count));
|
|
memset(zone_count,0,ZONES*sizeof(*zone_count));
|
|
check_zones(ROOT_INO);
|
|
recursive_check(ROOT_INO);
|
|
check_counts();
|
|
}
|
|
|
|
int main(int argc, char ** argv)
|
|
{
|
|
struct termios 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");
|
|
while (argc-- > 1) {
|
|
argv++;
|
|
if (argv[0][0] != '-')
|
|
if (device_name)
|
|
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: usage();
|
|
}
|
|
}
|
|
if (!device_name)
|
|
usage();
|
|
check_mount(); /* trying to check a mounted filesystem? */
|
|
if (repair && !automatic) {
|
|
if (!isatty(0) || !isatty(1))
|
|
die("need terminal for interactive repairs");
|
|
tcgetattr(0,&termios);
|
|
tmp = termios;
|
|
tmp.c_lflag &= ~(ICANON|ECHO);
|
|
tcsetattr(0,TCSANOW,&tmp);
|
|
}
|
|
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_tables();
|
|
|
|
/*
|
|
* 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);
|
|
if (repair && !automatic)
|
|
tcsetattr(0,TCSANOW,&termios);
|
|
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);
|
|
|
|
check_root();
|
|
check();
|
|
if (verbose) {
|
|
int i, free;
|
|
|
|
for (i=1,free=0 ; i < INODES ; i++)
|
|
if (!inode_in_use(i))
|
|
free++;
|
|
printf("\n%6d inodes used (%d%%)\n",(INODES-free-1),
|
|
100*(INODES-free-1)/(INODES-1));
|
|
for (i=FIRSTZONE,free=0 ; i < ZONES ; i++)
|
|
if (!zone_in_use(i))
|
|
free++;
|
|
printf("%6d zones used (%d%%)\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;
|
|
}
|