1 | /* vi: set sw=4 ts=4: */
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2 | /*
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3 | * fsck.c - a file system consistency checker for Linux.
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4 | *
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5 | * (C) 1991, 1992 Linus Torvalds.
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6 | *
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7 | * Licensed under GPLv2, see file LICENSE in this tarball for details.
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8 | */
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9 |
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10 | /*
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11 | * 09.11.91 - made the first rudimentary functions
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12 | *
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13 | * 10.11.91 - updated, does checking, no repairs yet.
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14 | * Sent out to the mailing-list for testing.
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15 | *
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16 | * 14.11.91 - Testing seems to have gone well. Added some
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17 | * correction-code, and changed some functions.
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18 | *
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19 | * 15.11.91 - More correction code. Hopefully it notices most
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20 | * cases now, and tries to do something about them.
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21 | *
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22 | * 16.11.91 - More corrections (thanks to Mika Jalava). Most
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23 | * things seem to work now. Yeah, sure.
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24 | *
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25 | *
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26 | * 19.04.92 - Had to start over again from this old version, as a
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27 | * kernel bug ate my enhanced fsck in february.
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28 | *
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29 | * 28.02.93 - added support for different directory entry sizes..
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30 | *
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31 | * Sat Mar 6 18:59:42 1993, faith@cs.unc.edu: Output namelen with
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32 | * super-block information
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33 | *
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34 | * Sat Oct 9 11:17:11 1993, faith@cs.unc.edu: make exit status conform
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35 | * to that required by fsutil
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36 | *
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37 | * Mon Jan 3 11:06:52 1994 - Dr. Wettstein (greg%wind.uucp@plains.nodak.edu)
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38 | * Added support for file system valid flag. Also
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39 | * added program_version variable and output of
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40 | * program name and version number when program
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41 | * is executed.
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42 | *
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43 | * 30.10.94 - added support for v2 filesystem
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44 | * (Andreas Schwab, schwab@issan.informatik.uni-dortmund.de)
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45 | *
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46 | * 10.12.94 - added test to prevent checking of mounted fs adapted
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47 | * from Theodore Ts'o's (tytso@athena.mit.edu) e2fsck
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48 | * program. (Daniel Quinlan, quinlan@yggdrasil.com)
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49 | *
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50 | * 01.07.96 - Fixed the v2 fs stuff to use the right #defines and such
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51 | * for modern libcs (janl@math.uio.no, Nicolai Langfeldt)
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52 | *
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53 | * 02.07.96 - Added C bit fiddling routines from rmk@ecs.soton.ac.uk
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54 | * (Russell King). He made them for ARM. It would seem
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55 | * that the ARM is powerful enough to do this in C whereas
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56 | * i386 and m64k must use assembly to get it fast >:-)
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57 | * This should make minix fsck system-independent.
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58 | * (janl@math.uio.no, Nicolai Langfeldt)
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59 | *
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60 | * 04.11.96 - Added minor fixes from Andreas Schwab to avoid compiler
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61 | * warnings. Added mc68k bitops from
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62 | * Joerg Dorchain <dorchain@mpi-sb.mpg.de>.
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63 | *
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64 | * 06.11.96 - Added v2 code submitted by Joerg Dorchain, but written by
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65 | * Andreas Schwab.
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66 | *
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67 | * 1999-02-22 Arkadiusz Mi¶kiewicz <misiek@misiek.eu.org>
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68 | * - added Native Language Support
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69 | *
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70 | *
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71 | * I've had no time to add comments - hopefully the function names
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72 | * are comments enough. As with all file system checkers, this assumes
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73 | * the file system is quiescent - don't use it on a mounted device
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74 | * unless you can be sure nobody is writing to it (and remember that the
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75 | * kernel can write to it when it searches for files).
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76 | *
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77 | * Usage: fsck [-larvsm] device
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78 | * -l for a listing of all the filenames
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79 | * -a for automatic repairs (not implemented)
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80 | * -r for repairs (interactive) (not implemented)
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81 | * -v for verbose (tells how many files)
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82 | * -s for super-block info
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83 | * -m for minix-like "mode not cleared" warnings
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84 | * -f force filesystem check even if filesystem marked as valid
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85 | *
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86 | * The device may be a block device or a image of one, but this isn't
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87 | * enforced (but it's not much fun on a character device :-).
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88 | */
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89 |
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90 | #include <mntent.h>
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91 | #include "libbb.h"
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92 | #include "minix.h"
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93 |
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94 | #ifndef BLKGETSIZE
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95 | #define BLKGETSIZE _IO(0x12,96) /* return device size */
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96 | #endif
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97 |
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98 | enum {
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99 | #ifdef UNUSED
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100 | MINIX1_LINK_MAX = 250,
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101 | MINIX2_LINK_MAX = 65530,
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102 | MINIX_I_MAP_SLOTS = 8,
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103 | MINIX_Z_MAP_SLOTS = 64,
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104 | MINIX_V1 = 0x0001, /* original minix fs */
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105 | MINIX_V2 = 0x0002, /* minix V2 fs */
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106 | #endif
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107 | MINIX_NAME_MAX = 255, /* # chars in a file name */
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108 | };
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109 |
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110 | #if !ENABLE_FEATURE_MINIX2
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111 | enum { version2 = 0 };
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112 | #endif
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113 |
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114 | enum { MAX_DEPTH = 32 };
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115 |
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116 | struct globals {
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117 | int dev_fd;
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118 | #if ENABLE_FEATURE_MINIX2
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119 | smallint version2;
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120 | #endif
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121 | smallint repair, automatic, verbose, list, show, warn_mode, force;
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122 | smallint changed; /* is filesystem modified? */
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123 | smallint errors_uncorrected; /* flag if some error was not corrected */
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124 | smallint termios_set;
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125 | smallint dirsize;
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126 | smallint namelen;
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127 | char *device_name;
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128 | int directory, regular, blockdev, chardev, links, symlinks, total;
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129 | char *inode_buffer;
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130 |
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131 | char *inode_map;
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132 | char *zone_map;
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133 |
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134 | unsigned char *inode_count;
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135 | unsigned char *zone_count;
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136 |
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137 | /* File-name data */
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138 | int name_depth;
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139 | char *name_component[MAX_DEPTH+1];
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140 |
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141 | /* Bigger stuff */
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142 | struct termios sv_termios;
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143 | char super_block_buffer[BLOCK_SIZE];
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144 | char add_zone_ind_blk[BLOCK_SIZE];
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145 | char add_zone_dind_blk[BLOCK_SIZE];
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146 | USE_FEATURE_MINIX2(char add_zone_tind_blk[BLOCK_SIZE];)
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147 | char check_file_blk[BLOCK_SIZE];
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148 |
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149 | /* File-name data */
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150 | char current_name[MAX_DEPTH * MINIX_NAME_MAX];
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151 | };
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152 |
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153 | #define G (*ptr_to_globals)
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154 | #define dev_fd (G.dev_fd )
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155 | #if ENABLE_FEATURE_MINIX2
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156 | #define version2 (G.version2 )
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157 | #endif
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158 | #define repair (G.repair )
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159 | #define automatic (G.automatic )
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160 | #define verbose (G.verbose )
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161 | #define list (G.list )
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162 | #define show (G.show )
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163 | #define warn_mode (G.warn_mode )
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164 | #define force (G.force )
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165 | #define changed (G.changed )
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166 | #define errors_uncorrected (G.errors_uncorrected )
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167 | #define termios_set (G.termios_set )
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168 | #define dirsize (G.dirsize )
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169 | #define namelen (G.namelen )
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170 | #define device_name (G.device_name )
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171 | #define directory (G.directory )
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172 | #define regular (G.regular )
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173 | #define blockdev (G.blockdev )
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174 | #define chardev (G.chardev )
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175 | #define links (G.links )
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176 | #define symlinks (G.symlinks )
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177 | #define total (G.total )
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178 | #define inode_buffer (G.inode_buffer )
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179 | #define inode_map (G.inode_map )
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180 | #define zone_map (G.zone_map )
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181 | #define inode_count (G.inode_count )
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182 | #define zone_count (G.zone_count )
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183 | #define name_depth (G.name_depth )
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184 | #define name_component (G.name_component )
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185 | #define sv_termios (G.sv_termios )
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186 | #define super_block_buffer (G.super_block_buffer )
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187 | #define add_zone_ind_blk (G.add_zone_ind_blk )
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188 | #define add_zone_dind_blk (G.add_zone_dind_blk )
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189 | #define add_zone_tind_blk (G.add_zone_tind_blk )
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190 | #define check_file_blk (G.check_file_blk )
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191 | #define current_name (G.current_name )
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192 | #define INIT_G() do { \
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193 | PTR_TO_GLOBALS = xzalloc(sizeof(G)); \
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194 | dirsize = 16; \
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195 | namelen = 14; \
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196 | current_name[0] = '/'; \
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197 | /*current_name[1] = '\0';*/ \
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198 | name_component[0] = ¤t_name[0]; \
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199 | } while (0)
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200 |
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201 | #define Inode1 (((struct minix1_inode *) inode_buffer)-1)
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202 | #define Inode2 (((struct minix2_inode *) inode_buffer)-1)
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203 |
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204 | #define Super (*(struct minix_super_block *)(super_block_buffer))
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205 |
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206 | #if ENABLE_FEATURE_MINIX2
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207 | # define ZONES ((unsigned)(version2 ? Super.s_zones : Super.s_nzones))
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208 | #else
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209 | # define ZONES ((unsigned)(Super.s_nzones))
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210 | #endif
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211 | #define INODES ((unsigned)Super.s_ninodes)
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212 | #define IMAPS ((unsigned)Super.s_imap_blocks)
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213 | #define ZMAPS ((unsigned)Super.s_zmap_blocks)
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214 | #define FIRSTZONE ((unsigned)Super.s_firstdatazone)
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215 | #define ZONESIZE ((unsigned)Super.s_log_zone_size)
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216 | #define MAXSIZE ((unsigned)Super.s_max_size)
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217 | #define MAGIC (Super.s_magic)
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218 |
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219 | /* gcc likes this more (code is smaller) than macro variant */
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220 | static ALWAYS_INLINE unsigned div_roundup(unsigned size, unsigned n)
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221 | {
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222 | return (size + n-1) / n;
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223 | }
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224 |
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225 | #if ENABLE_FEATURE_MINIX2
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226 | #define INODE_BLOCKS div_roundup(INODES, (version2 ? MINIX2_INODES_PER_BLOCK \
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227 | : MINIX1_INODES_PER_BLOCK))
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228 | #else
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229 | #define INODE_BLOCKS div_roundup(INODES, MINIX1_INODES_PER_BLOCK)
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230 | #endif
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231 |
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232 | #define INODE_BUFFER_SIZE (INODE_BLOCKS * BLOCK_SIZE)
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233 | #define NORM_FIRSTZONE (2 + IMAPS + ZMAPS + INODE_BLOCKS)
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234 |
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235 | /* Before you ask "where they come from?": */
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236 | /* setbit/clrbit are supplied by sys/param.h */
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237 |
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238 | static int minix_bit(const char *a, unsigned i)
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239 | {
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240 | return (a[i >> 3] & (1<<(i & 7)));
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241 | }
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242 |
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243 | static void minix_setbit(char *a, unsigned i)
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244 | {
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245 | setbit(a, i);
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246 | changed = 1;
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247 | }
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248 | static void minix_clrbit(char *a, unsigned i)
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249 | {
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250 | clrbit(a, i);
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251 | changed = 1;
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252 | }
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253 |
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254 | /* Note: do not assume 0/1, it is 0/nonzero */
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255 | #define zone_in_use(x) (minix_bit(zone_map,(x)-FIRSTZONE+1))
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256 | #define inode_in_use(x) (minix_bit(inode_map,(x)))
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257 |
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258 | #define mark_inode(x) (minix_setbit(inode_map,(x)))
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259 | #define unmark_inode(x) (minix_clrbit(inode_map,(x)))
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260 |
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261 | #define mark_zone(x) (minix_setbit(zone_map,(x)-FIRSTZONE+1))
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262 | #define unmark_zone(x) (minix_clrbit(zone_map,(x)-FIRSTZONE+1))
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263 |
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264 |
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265 | static void recursive_check(unsigned ino);
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266 | #if ENABLE_FEATURE_MINIX2
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267 | static void recursive_check2(unsigned ino);
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268 | #endif
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269 |
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270 | static void die(const char *str) ATTRIBUTE_NORETURN;
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271 | static void die(const char *str)
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272 | {
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273 | if (termios_set)
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274 | tcsetattr(0, TCSANOW, &sv_termios);
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275 | bb_error_msg_and_die("%s", str);
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276 | }
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277 |
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278 | static void push_filename(const char *name)
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279 | {
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280 | // /dir/dir/dir/file
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281 | // ^ ^ ^
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282 | // [0] [1] [2] <-name_component[i]
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283 | if (name_depth < MAX_DEPTH) {
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284 | int len;
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285 | char *p = name_component[name_depth];
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286 | *p++ = '/';
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287 | len = sprintf(p, "%.*s", namelen, name);
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288 | name_component[name_depth + 1] = p + len;
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289 | }
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290 | name_depth++;
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291 | }
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292 |
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293 | static void pop_filename(void)
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294 | {
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295 | name_depth--;
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296 | if (name_depth < MAX_DEPTH) {
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297 | *name_component[name_depth] = '\0';
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298 | if (!name_depth) {
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299 | current_name[0] = '/';
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300 | current_name[1] = '\0';
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301 | }
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302 | }
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303 | }
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304 |
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305 | static int ask(const char *string, int def)
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306 | {
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307 | int c;
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308 |
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309 | if (!repair) {
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310 | puts("");
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311 | errors_uncorrected = 1;
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312 | return 0;
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313 | }
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314 | if (automatic) {
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315 | puts("");
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316 | if (!def)
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317 | errors_uncorrected = 1;
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318 | return def;
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319 | }
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320 | printf(def ? "%s (y/n)? " : "%s (n/y)? ", string);
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321 | for (;;) {
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322 | fflush(stdout);
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323 | c = getchar();
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324 | if (c == EOF) {
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325 | if (!def)
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326 | errors_uncorrected = 1;
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327 | return def;
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328 | }
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329 | c = toupper(c);
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330 | if (c == 'Y') {
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331 | def = 1;
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332 | break;
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333 | } else if (c == 'N') {
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334 | def = 0;
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335 | break;
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336 | } else if (c == ' ' || c == '\n')
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337 | break;
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338 | }
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339 | if (def)
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340 | printf("y\n");
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341 | else {
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342 | printf("n\n");
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343 | errors_uncorrected = 1;
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344 | }
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345 | return def;
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346 | }
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347 |
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348 | /*
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349 | * Make certain that we aren't checking a filesystem that is on a
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350 | * mounted partition. Code adapted from e2fsck, Copyright (C) 1993,
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351 | * 1994 Theodore Ts'o. Also licensed under GPL.
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352 | */
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353 | static void check_mount(void)
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354 | {
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355 | FILE *f;
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356 | struct mntent *mnt;
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357 | int cont;
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358 | int fd;
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359 |
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360 | f = setmntent(MOUNTED, "r");
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361 | if (f == NULL)
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362 | return;
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363 | while ((mnt = getmntent(f)) != NULL)
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364 | if (strcmp(device_name, mnt->mnt_fsname) == 0)
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365 | break;
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366 | endmntent(f);
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367 | if (!mnt)
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368 | return;
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369 |
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370 | /*
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371 | * If the root is mounted read-only, then /etc/mtab is
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372 | * probably not correct; so we won't issue a warning based on
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373 | * it.
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374 | */
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375 | fd = open(MOUNTED, O_RDWR);
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376 | if (fd < 0 && errno == EROFS)
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377 | return;
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378 | close(fd);
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379 |
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380 | printf("%s is mounted. ", device_name);
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381 | cont = 0;
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382 | if (isatty(0) && isatty(1))
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383 | cont = ask("Do you really want to continue", 0);
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384 | if (!cont) {
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385 | printf("Check aborted\n");
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386 | exit(0);
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387 | }
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388 | }
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389 |
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390 | /*
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391 | * check_zone_nr checks to see that *nr is a valid zone nr. If it
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392 | * isn't, it will possibly be repaired. Check_zone_nr sets *corrected
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393 | * if an error was corrected, and returns the zone (0 for no zone
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394 | * or a bad zone-number).
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395 | */
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396 | static int check_zone_nr2(uint32_t *nr, smallint *corrected)
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397 | {
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398 | const char *msg;
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399 | if (!*nr)
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400 | return 0;
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401 | if (*nr < FIRSTZONE)
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402 | msg = "< FIRSTZONE";
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403 | else if (*nr >= ZONES)
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404 | msg = ">= ZONES";
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405 | else
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406 | return *nr;
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407 | printf("Zone nr %s in file '%s'. ", msg, current_name);
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408 | if (ask("Remove block", 1)) {
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409 | *nr = 0;
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410 | *corrected = 1;
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411 | }
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412 | return 0;
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413 | }
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414 |
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415 | static int check_zone_nr(uint16_t *nr, smallint *corrected)
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416 | {
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417 | uint32_t nr32 = *nr;
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418 | int r = check_zone_nr2(&nr32, corrected);
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419 | *nr = (uint16_t)nr32;
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420 | return r;
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421 | }
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422 |
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423 | /*
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424 | * read-block reads block nr into the buffer at addr.
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425 | */
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426 | static void read_block(unsigned nr, char *addr)
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427 | {
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428 | if (!nr) {
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429 | memset(addr, 0, BLOCK_SIZE);
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430 | return;
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431 | }
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432 | if (BLOCK_SIZE * nr != lseek(dev_fd, BLOCK_SIZE * nr, SEEK_SET)) {
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433 | printf("%s: cannot seek to block in file '%s'\n",
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434 | bb_msg_read_error, current_name);
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435 | errors_uncorrected = 1;
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436 | memset(addr, 0, BLOCK_SIZE);
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437 | } else if (BLOCK_SIZE != read(dev_fd, addr, BLOCK_SIZE)) {
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438 | printf("%s: bad block in file '%s'\n",
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439 | bb_msg_read_error, current_name);
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440 | errors_uncorrected = 1;
|
---|
441 | memset(addr, 0, BLOCK_SIZE);
|
---|
442 | }
|
---|
443 | }
|
---|
444 |
|
---|
445 | /*
|
---|
446 | * write_block writes block nr to disk.
|
---|
447 | */
|
---|
448 | static void write_block(unsigned nr, char *addr)
|
---|
449 | {
|
---|
450 | if (!nr)
|
---|
451 | return;
|
---|
452 | if (nr < FIRSTZONE || nr >= ZONES) {
|
---|
453 | printf("Internal error: trying to write bad block\n"
|
---|
454 | "Write request ignored\n");
|
---|
455 | errors_uncorrected = 1;
|
---|
456 | return;
|
---|
457 | }
|
---|
458 | if (BLOCK_SIZE * nr != lseek(dev_fd, BLOCK_SIZE * nr, SEEK_SET))
|
---|
459 | die("seek failed in write_block");
|
---|
460 | if (BLOCK_SIZE != write(dev_fd, addr, BLOCK_SIZE)) {
|
---|
461 | printf("%s: bad block in file '%s'\n",
|
---|
462 | bb_msg_write_error, current_name);
|
---|
463 | errors_uncorrected = 1;
|
---|
464 | }
|
---|
465 | }
|
---|
466 |
|
---|
467 | /*
|
---|
468 | * map_block calculates the absolute block nr of a block in a file.
|
---|
469 | * It sets 'changed' if the inode has needed changing, and re-writes
|
---|
470 | * any indirect blocks with errors.
|
---|
471 | */
|
---|
472 | static int map_block(struct minix1_inode *inode, unsigned blknr)
|
---|
473 | {
|
---|
474 | uint16_t ind[BLOCK_SIZE >> 1];
|
---|
475 | uint16_t dind[BLOCK_SIZE >> 1];
|
---|
476 | int block, result;
|
---|
477 | smallint blk_chg;
|
---|
478 |
|
---|
479 | if (blknr < 7)
|
---|
480 | return check_zone_nr(inode->i_zone + blknr, &changed);
|
---|
481 | blknr -= 7;
|
---|
482 | if (blknr < 512) {
|
---|
483 | block = check_zone_nr(inode->i_zone + 7, &changed);
|
---|
484 | read_block(block, (char *) ind);
|
---|
485 | blk_chg = 0;
|
---|
486 | result = check_zone_nr(blknr + ind, &blk_chg);
|
---|
487 | if (blk_chg)
|
---|
488 | write_block(block, (char *) ind);
|
---|
489 | return result;
|
---|
490 | }
|
---|
491 | blknr -= 512;
|
---|
492 | block = check_zone_nr(inode->i_zone + 8, &changed);
|
---|
493 | read_block(block, (char *) dind);
|
---|
494 | blk_chg = 0;
|
---|
495 | result = check_zone_nr(dind + (blknr / 512), &blk_chg);
|
---|
496 | if (blk_chg)
|
---|
497 | write_block(block, (char *) dind);
|
---|
498 | block = result;
|
---|
499 | read_block(block, (char *) ind);
|
---|
500 | blk_chg = 0;
|
---|
501 | result = check_zone_nr(ind + (blknr % 512), &blk_chg);
|
---|
502 | if (blk_chg)
|
---|
503 | write_block(block, (char *) ind);
|
---|
504 | return result;
|
---|
505 | }
|
---|
506 |
|
---|
507 | #if ENABLE_FEATURE_MINIX2
|
---|
508 | static int map_block2(struct minix2_inode *inode, unsigned blknr)
|
---|
509 | {
|
---|
510 | uint32_t ind[BLOCK_SIZE >> 2];
|
---|
511 | uint32_t dind[BLOCK_SIZE >> 2];
|
---|
512 | uint32_t tind[BLOCK_SIZE >> 2];
|
---|
513 | int block, result;
|
---|
514 | smallint blk_chg;
|
---|
515 |
|
---|
516 | if (blknr < 7)
|
---|
517 | return check_zone_nr2(inode->i_zone + blknr, &changed);
|
---|
518 | blknr -= 7;
|
---|
519 | if (blknr < 256) {
|
---|
520 | block = check_zone_nr2(inode->i_zone + 7, &changed);
|
---|
521 | read_block(block, (char *) ind);
|
---|
522 | blk_chg = 0;
|
---|
523 | result = check_zone_nr2(blknr + ind, &blk_chg);
|
---|
524 | if (blk_chg)
|
---|
525 | write_block(block, (char *) ind);
|
---|
526 | return result;
|
---|
527 | }
|
---|
528 | blknr -= 256;
|
---|
529 | if (blknr >= 256 * 256) {
|
---|
530 | block = check_zone_nr2(inode->i_zone + 8, &changed);
|
---|
531 | read_block(block, (char *) dind);
|
---|
532 | blk_chg = 0;
|
---|
533 | result = check_zone_nr2(dind + blknr / 256, &blk_chg);
|
---|
534 | if (blk_chg)
|
---|
535 | write_block(block, (char *) dind);
|
---|
536 | block = result;
|
---|
537 | read_block(block, (char *) ind);
|
---|
538 | blk_chg = 0;
|
---|
539 | result = check_zone_nr2(ind + blknr % 256, &blk_chg);
|
---|
540 | if (blk_chg)
|
---|
541 | write_block(block, (char *) ind);
|
---|
542 | return result;
|
---|
543 | }
|
---|
544 | blknr -= 256 * 256;
|
---|
545 | block = check_zone_nr2(inode->i_zone + 9, &changed);
|
---|
546 | read_block(block, (char *) tind);
|
---|
547 | blk_chg = 0;
|
---|
548 | result = check_zone_nr2(tind + blknr / (256 * 256), &blk_chg);
|
---|
549 | if (blk_chg)
|
---|
550 | write_block(block, (char *) tind);
|
---|
551 | block = result;
|
---|
552 | read_block(block, (char *) dind);
|
---|
553 | blk_chg = 0;
|
---|
554 | result = check_zone_nr2(dind + (blknr / 256) % 256, &blk_chg);
|
---|
555 | if (blk_chg)
|
---|
556 | write_block(block, (char *) dind);
|
---|
557 | block = result;
|
---|
558 | read_block(block, (char *) ind);
|
---|
559 | blk_chg = 0;
|
---|
560 | result = check_zone_nr2(ind + blknr % 256, &blk_chg);
|
---|
561 | if (blk_chg)
|
---|
562 | write_block(block, (char *) ind);
|
---|
563 | return result;
|
---|
564 | }
|
---|
565 | #endif
|
---|
566 |
|
---|
567 | static void write_super_block(void)
|
---|
568 | {
|
---|
569 | /*
|
---|
570 | * Set the state of the filesystem based on whether or not there
|
---|
571 | * are uncorrected errors. The filesystem valid flag is
|
---|
572 | * unconditionally set if we get this far.
|
---|
573 | */
|
---|
574 | Super.s_state |= MINIX_VALID_FS | MINIX_ERROR_FS;
|
---|
575 | if (!errors_uncorrected)
|
---|
576 | Super.s_state &= ~MINIX_ERROR_FS;
|
---|
577 |
|
---|
578 | if (BLOCK_SIZE != lseek(dev_fd, BLOCK_SIZE, SEEK_SET))
|
---|
579 | die("seek failed in write_super_block");
|
---|
580 | if (BLOCK_SIZE != write(dev_fd, super_block_buffer, BLOCK_SIZE))
|
---|
581 | die("cannot write super-block");
|
---|
582 | }
|
---|
583 |
|
---|
584 | static void write_tables(void)
|
---|
585 | {
|
---|
586 | write_super_block();
|
---|
587 |
|
---|
588 | if (IMAPS * BLOCK_SIZE != write(dev_fd, inode_map, IMAPS * BLOCK_SIZE))
|
---|
589 | die("cannot write inode map");
|
---|
590 | if (ZMAPS * BLOCK_SIZE != write(dev_fd, zone_map, ZMAPS * BLOCK_SIZE))
|
---|
591 | die("cannot write zone map");
|
---|
592 | if (INODE_BUFFER_SIZE != write(dev_fd, inode_buffer, INODE_BUFFER_SIZE))
|
---|
593 | die("cannot write inodes");
|
---|
594 | }
|
---|
595 |
|
---|
596 | static void get_dirsize(void)
|
---|
597 | {
|
---|
598 | int block;
|
---|
599 | char blk[BLOCK_SIZE];
|
---|
600 | int size;
|
---|
601 |
|
---|
602 | #if ENABLE_FEATURE_MINIX2
|
---|
603 | if (version2)
|
---|
604 | block = Inode2[MINIX_ROOT_INO].i_zone[0];
|
---|
605 | else
|
---|
606 | #endif
|
---|
607 | block = Inode1[MINIX_ROOT_INO].i_zone[0];
|
---|
608 | read_block(block, blk);
|
---|
609 | for (size = 16; size < BLOCK_SIZE; size <<= 1) {
|
---|
610 | if (strcmp(blk + size + 2, "..") == 0) {
|
---|
611 | dirsize = size;
|
---|
612 | namelen = size - 2;
|
---|
613 | return;
|
---|
614 | }
|
---|
615 | }
|
---|
616 | /* use defaults */
|
---|
617 | }
|
---|
618 |
|
---|
619 | static void read_superblock(void)
|
---|
620 | {
|
---|
621 | if (BLOCK_SIZE != lseek(dev_fd, BLOCK_SIZE, SEEK_SET))
|
---|
622 | die("seek failed");
|
---|
623 | if (BLOCK_SIZE != read(dev_fd, super_block_buffer, BLOCK_SIZE))
|
---|
624 | die("cannot read super block");
|
---|
625 | /* already initialized to:
|
---|
626 | namelen = 14;
|
---|
627 | dirsize = 16;
|
---|
628 | version2 = 0;
|
---|
629 | */
|
---|
630 | if (MAGIC == MINIX1_SUPER_MAGIC) {
|
---|
631 | } else if (MAGIC == MINIX1_SUPER_MAGIC2) {
|
---|
632 | namelen = 30;
|
---|
633 | dirsize = 32;
|
---|
634 | #if ENABLE_FEATURE_MINIX2
|
---|
635 | } else if (MAGIC == MINIX2_SUPER_MAGIC) {
|
---|
636 | version2 = 1;
|
---|
637 | } else if (MAGIC == MINIX2_SUPER_MAGIC2) {
|
---|
638 | namelen = 30;
|
---|
639 | dirsize = 32;
|
---|
640 | version2 = 1;
|
---|
641 | #endif
|
---|
642 | } else
|
---|
643 | die("bad magic number in super-block");
|
---|
644 | if (ZONESIZE != 0 || BLOCK_SIZE != 1024)
|
---|
645 | die("only 1k blocks/zones supported");
|
---|
646 | if (IMAPS * BLOCK_SIZE * 8 < INODES + 1)
|
---|
647 | die("bad s_imap_blocks field in super-block");
|
---|
648 | if (ZMAPS * BLOCK_SIZE * 8 < ZONES - FIRSTZONE + 1)
|
---|
649 | die("bad s_zmap_blocks field in super-block");
|
---|
650 | }
|
---|
651 |
|
---|
652 | static void read_tables(void)
|
---|
653 | {
|
---|
654 | inode_map = xzalloc(IMAPS * BLOCK_SIZE);
|
---|
655 | zone_map = xzalloc(ZMAPS * BLOCK_SIZE);
|
---|
656 | inode_buffer = xmalloc(INODE_BUFFER_SIZE);
|
---|
657 | inode_count = xmalloc(INODES + 1);
|
---|
658 | zone_count = xmalloc(ZONES);
|
---|
659 | if (IMAPS * BLOCK_SIZE != read(dev_fd, inode_map, IMAPS * BLOCK_SIZE))
|
---|
660 | die("cannot read inode map");
|
---|
661 | if (ZMAPS * BLOCK_SIZE != read(dev_fd, zone_map, ZMAPS * BLOCK_SIZE))
|
---|
662 | die("cannot read zone map");
|
---|
663 | if (INODE_BUFFER_SIZE != read(dev_fd, inode_buffer, INODE_BUFFER_SIZE))
|
---|
664 | die("cannot read inodes");
|
---|
665 | if (NORM_FIRSTZONE != FIRSTZONE) {
|
---|
666 | printf("warning: firstzone!=norm_firstzone\n");
|
---|
667 | errors_uncorrected = 1;
|
---|
668 | }
|
---|
669 | get_dirsize();
|
---|
670 | if (show) {
|
---|
671 | printf("%u inodes\n"
|
---|
672 | "%u blocks\n"
|
---|
673 | "Firstdatazone=%u (%u)\n"
|
---|
674 | "Zonesize=%u\n"
|
---|
675 | "Maxsize=%u\n"
|
---|
676 | "Filesystem state=%u\n"
|
---|
677 | "namelen=%u\n\n",
|
---|
678 | INODES,
|
---|
679 | ZONES,
|
---|
680 | FIRSTZONE, NORM_FIRSTZONE,
|
---|
681 | BLOCK_SIZE << ZONESIZE,
|
---|
682 | MAXSIZE,
|
---|
683 | Super.s_state,
|
---|
684 | namelen);
|
---|
685 | }
|
---|
686 | }
|
---|
687 |
|
---|
688 | static struct minix1_inode *get_inode(unsigned nr)
|
---|
689 | {
|
---|
690 | struct minix1_inode *inode;
|
---|
691 |
|
---|
692 | if (!nr || nr > INODES)
|
---|
693 | return NULL;
|
---|
694 | total++;
|
---|
695 | inode = Inode1 + nr;
|
---|
696 | if (!inode_count[nr]) {
|
---|
697 | if (!inode_in_use(nr)) {
|
---|
698 | printf("Inode %d is marked as 'unused', but it is used "
|
---|
699 | "for file '%s'\n", nr, current_name);
|
---|
700 | if (repair) {
|
---|
701 | if (ask("Mark as 'in use'", 1))
|
---|
702 | mark_inode(nr);
|
---|
703 | else
|
---|
704 | errors_uncorrected = 1;
|
---|
705 | }
|
---|
706 | }
|
---|
707 | if (S_ISDIR(inode->i_mode))
|
---|
708 | directory++;
|
---|
709 | else if (S_ISREG(inode->i_mode))
|
---|
710 | regular++;
|
---|
711 | else if (S_ISCHR(inode->i_mode))
|
---|
712 | chardev++;
|
---|
713 | else if (S_ISBLK(inode->i_mode))
|
---|
714 | blockdev++;
|
---|
715 | else if (S_ISLNK(inode->i_mode))
|
---|
716 | symlinks++;
|
---|
717 | else if (S_ISSOCK(inode->i_mode));
|
---|
718 | else if (S_ISFIFO(inode->i_mode));
|
---|
719 | else {
|
---|
720 | printf("%s has mode %05o\n", current_name, inode->i_mode);
|
---|
721 | }
|
---|
722 |
|
---|
723 | } else
|
---|
724 | links++;
|
---|
725 | if (!++inode_count[nr]) {
|
---|
726 | printf("Warning: inode count too big\n");
|
---|
727 | inode_count[nr]--;
|
---|
728 | errors_uncorrected = 1;
|
---|
729 | }
|
---|
730 | return inode;
|
---|
731 | }
|
---|
732 |
|
---|
733 | #if ENABLE_FEATURE_MINIX2
|
---|
734 | static struct minix2_inode *get_inode2(unsigned nr)
|
---|
735 | {
|
---|
736 | struct minix2_inode *inode;
|
---|
737 |
|
---|
738 | if (!nr || nr > INODES)
|
---|
739 | return NULL;
|
---|
740 | total++;
|
---|
741 | inode = Inode2 + nr;
|
---|
742 | if (!inode_count[nr]) {
|
---|
743 | if (!inode_in_use(nr)) {
|
---|
744 | printf("Inode %d is marked as 'unused', but it is used "
|
---|
745 | "for file '%s'\n", nr, current_name);
|
---|
746 | if (repair) {
|
---|
747 | if (ask("Mark as 'in use'", 1))
|
---|
748 | mark_inode(nr);
|
---|
749 | else
|
---|
750 | errors_uncorrected = 1;
|
---|
751 | }
|
---|
752 | }
|
---|
753 | if (S_ISDIR(inode->i_mode))
|
---|
754 | directory++;
|
---|
755 | else if (S_ISREG(inode->i_mode))
|
---|
756 | regular++;
|
---|
757 | else if (S_ISCHR(inode->i_mode))
|
---|
758 | chardev++;
|
---|
759 | else if (S_ISBLK(inode->i_mode))
|
---|
760 | blockdev++;
|
---|
761 | else if (S_ISLNK(inode->i_mode))
|
---|
762 | symlinks++;
|
---|
763 | else if (S_ISSOCK(inode->i_mode));
|
---|
764 | else if (S_ISFIFO(inode->i_mode));
|
---|
765 | else {
|
---|
766 | printf("%s has mode %05o\n", current_name, inode->i_mode);
|
---|
767 | }
|
---|
768 | } else
|
---|
769 | links++;
|
---|
770 | if (!++inode_count[nr]) {
|
---|
771 | printf("Warning: inode count too big\n");
|
---|
772 | inode_count[nr]--;
|
---|
773 | errors_uncorrected = 1;
|
---|
774 | }
|
---|
775 | return inode;
|
---|
776 | }
|
---|
777 | #endif
|
---|
778 |
|
---|
779 | static void check_root(void)
|
---|
780 | {
|
---|
781 | struct minix1_inode *inode = Inode1 + MINIX_ROOT_INO;
|
---|
782 |
|
---|
783 | if (!inode || !S_ISDIR(inode->i_mode))
|
---|
784 | die("root inode isn't a directory");
|
---|
785 | }
|
---|
786 |
|
---|
787 | #if ENABLE_FEATURE_MINIX2
|
---|
788 | static void check_root2(void)
|
---|
789 | {
|
---|
790 | struct minix2_inode *inode = Inode2 + MINIX_ROOT_INO;
|
---|
791 |
|
---|
792 | if (!inode || !S_ISDIR(inode->i_mode))
|
---|
793 | die("root inode isn't a directory");
|
---|
794 | }
|
---|
795 | #else
|
---|
796 | void check_root2(void);
|
---|
797 | #endif
|
---|
798 |
|
---|
799 | static int add_zone(uint16_t *znr, smallint *corrected)
|
---|
800 | {
|
---|
801 | int result;
|
---|
802 | int block;
|
---|
803 |
|
---|
804 | result = 0;
|
---|
805 | block = check_zone_nr(znr, corrected);
|
---|
806 | if (!block)
|
---|
807 | return 0;
|
---|
808 | if (zone_count[block]) {
|
---|
809 | printf("Already used block is reused in file '%s'. ",
|
---|
810 | current_name);
|
---|
811 | if (ask("Clear", 1)) {
|
---|
812 | *znr = 0;
|
---|
813 | block = 0;
|
---|
814 | *corrected = 1;
|
---|
815 | return 0;
|
---|
816 | }
|
---|
817 | }
|
---|
818 | if (!zone_in_use(block)) {
|
---|
819 | printf("Block %d in file '%s' is marked as 'unused'. ",
|
---|
820 | block, current_name);
|
---|
821 | if (ask("Correct", 1))
|
---|
822 | mark_zone(block);
|
---|
823 | }
|
---|
824 | if (!++zone_count[block])
|
---|
825 | zone_count[block]--;
|
---|
826 | return block;
|
---|
827 | }
|
---|
828 |
|
---|
829 | #if ENABLE_FEATURE_MINIX2
|
---|
830 | static int add_zone2(uint32_t *znr, smallint *corrected)
|
---|
831 | {
|
---|
832 | int result;
|
---|
833 | int block;
|
---|
834 |
|
---|
835 | result = 0;
|
---|
836 | block = check_zone_nr2(znr, corrected);
|
---|
837 | if (!block)
|
---|
838 | return 0;
|
---|
839 | if (zone_count[block]) {
|
---|
840 | printf("Already used block is reused in file '%s'. ",
|
---|
841 | current_name);
|
---|
842 | if (ask("Clear", 1)) {
|
---|
843 | *znr = 0;
|
---|
844 | block = 0;
|
---|
845 | *corrected = 1;
|
---|
846 | return 0;
|
---|
847 | }
|
---|
848 | }
|
---|
849 | if (!zone_in_use(block)) {
|
---|
850 | printf("Block %d in file '%s' is marked as 'unused'. ",
|
---|
851 | block, current_name);
|
---|
852 | if (ask("Correct", 1))
|
---|
853 | mark_zone(block);
|
---|
854 | }
|
---|
855 | if (!++zone_count[block])
|
---|
856 | zone_count[block]--;
|
---|
857 | return block;
|
---|
858 | }
|
---|
859 | #endif
|
---|
860 |
|
---|
861 | static void add_zone_ind(uint16_t *znr, smallint *corrected)
|
---|
862 | {
|
---|
863 | int i;
|
---|
864 | int block;
|
---|
865 | smallint chg_blk = 0;
|
---|
866 |
|
---|
867 | block = add_zone(znr, corrected);
|
---|
868 | if (!block)
|
---|
869 | return;
|
---|
870 | read_block(block, add_zone_ind_blk);
|
---|
871 | for (i = 0; i < (BLOCK_SIZE >> 1); i++)
|
---|
872 | add_zone(i + (uint16_t *) add_zone_ind_blk, &chg_blk);
|
---|
873 | if (chg_blk)
|
---|
874 | write_block(block, add_zone_ind_blk);
|
---|
875 | }
|
---|
876 |
|
---|
877 | #if ENABLE_FEATURE_MINIX2
|
---|
878 | static void add_zone_ind2(uint32_t *znr, smallint *corrected)
|
---|
879 | {
|
---|
880 | int i;
|
---|
881 | int block;
|
---|
882 | smallint chg_blk = 0;
|
---|
883 |
|
---|
884 | block = add_zone2(znr, corrected);
|
---|
885 | if (!block)
|
---|
886 | return;
|
---|
887 | read_block(block, add_zone_ind_blk);
|
---|
888 | for (i = 0; i < BLOCK_SIZE >> 2; i++)
|
---|
889 | add_zone2(i + (uint32_t *) add_zone_ind_blk, &chg_blk);
|
---|
890 | if (chg_blk)
|
---|
891 | write_block(block, add_zone_ind_blk);
|
---|
892 | }
|
---|
893 | #endif
|
---|
894 |
|
---|
895 | static void add_zone_dind(uint16_t *znr, smallint *corrected)
|
---|
896 | {
|
---|
897 | int i;
|
---|
898 | int block;
|
---|
899 | smallint chg_blk = 0;
|
---|
900 |
|
---|
901 | block = add_zone(znr, corrected);
|
---|
902 | if (!block)
|
---|
903 | return;
|
---|
904 | read_block(block, add_zone_dind_blk);
|
---|
905 | for (i = 0; i < (BLOCK_SIZE >> 1); i++)
|
---|
906 | add_zone_ind(i + (uint16_t *) add_zone_dind_blk, &chg_blk);
|
---|
907 | if (chg_blk)
|
---|
908 | write_block(block, add_zone_dind_blk);
|
---|
909 | }
|
---|
910 |
|
---|
911 | #if ENABLE_FEATURE_MINIX2
|
---|
912 | static void add_zone_dind2(uint32_t *znr, smallint *corrected)
|
---|
913 | {
|
---|
914 | int i;
|
---|
915 | int block;
|
---|
916 | smallint chg_blk = 0;
|
---|
917 |
|
---|
918 | block = add_zone2(znr, corrected);
|
---|
919 | if (!block)
|
---|
920 | return;
|
---|
921 | read_block(block, add_zone_dind_blk);
|
---|
922 | for (i = 0; i < BLOCK_SIZE >> 2; i++)
|
---|
923 | add_zone_ind2(i + (uint32_t *) add_zone_dind_blk, &chg_blk);
|
---|
924 | if (chg_blk)
|
---|
925 | write_block(block, add_zone_dind_blk);
|
---|
926 | }
|
---|
927 |
|
---|
928 | static void add_zone_tind2(uint32_t *znr, smallint *corrected)
|
---|
929 | {
|
---|
930 | int i;
|
---|
931 | int block;
|
---|
932 | smallint chg_blk = 0;
|
---|
933 |
|
---|
934 | block = add_zone2(znr, corrected);
|
---|
935 | if (!block)
|
---|
936 | return;
|
---|
937 | read_block(block, add_zone_tind_blk);
|
---|
938 | for (i = 0; i < BLOCK_SIZE >> 2; i++)
|
---|
939 | add_zone_dind2(i + (uint32_t *) add_zone_tind_blk, &chg_blk);
|
---|
940 | if (chg_blk)
|
---|
941 | write_block(block, add_zone_tind_blk);
|
---|
942 | }
|
---|
943 | #endif
|
---|
944 |
|
---|
945 | static void check_zones(unsigned i)
|
---|
946 | {
|
---|
947 | struct minix1_inode *inode;
|
---|
948 |
|
---|
949 | if (!i || i > INODES)
|
---|
950 | return;
|
---|
951 | if (inode_count[i] > 1) /* have we counted this file already? */
|
---|
952 | return;
|
---|
953 | inode = Inode1 + i;
|
---|
954 | if (!S_ISDIR(inode->i_mode) && !S_ISREG(inode->i_mode) &&
|
---|
955 | !S_ISLNK(inode->i_mode)) return;
|
---|
956 | for (i = 0; i < 7; i++)
|
---|
957 | add_zone(i + inode->i_zone, &changed);
|
---|
958 | add_zone_ind(7 + inode->i_zone, &changed);
|
---|
959 | add_zone_dind(8 + inode->i_zone, &changed);
|
---|
960 | }
|
---|
961 |
|
---|
962 | #if ENABLE_FEATURE_MINIX2
|
---|
963 | static void check_zones2(unsigned i)
|
---|
964 | {
|
---|
965 | struct minix2_inode *inode;
|
---|
966 |
|
---|
967 | if (!i || i > INODES)
|
---|
968 | return;
|
---|
969 | if (inode_count[i] > 1) /* have we counted this file already? */
|
---|
970 | return;
|
---|
971 | inode = Inode2 + i;
|
---|
972 | if (!S_ISDIR(inode->i_mode) && !S_ISREG(inode->i_mode)
|
---|
973 | && !S_ISLNK(inode->i_mode))
|
---|
974 | return;
|
---|
975 | for (i = 0; i < 7; i++)
|
---|
976 | add_zone2(i + inode->i_zone, &changed);
|
---|
977 | add_zone_ind2(7 + inode->i_zone, &changed);
|
---|
978 | add_zone_dind2(8 + inode->i_zone, &changed);
|
---|
979 | add_zone_tind2(9 + inode->i_zone, &changed);
|
---|
980 | }
|
---|
981 | #endif
|
---|
982 |
|
---|
983 | static void check_file(struct minix1_inode *dir, unsigned offset)
|
---|
984 | {
|
---|
985 | struct minix1_inode *inode;
|
---|
986 | int ino;
|
---|
987 | char *name;
|
---|
988 | int block;
|
---|
989 |
|
---|
990 | block = map_block(dir, offset / BLOCK_SIZE);
|
---|
991 | read_block(block, check_file_blk);
|
---|
992 | name = check_file_blk + (offset % BLOCK_SIZE) + 2;
|
---|
993 | ino = *(uint16_t *) (name - 2);
|
---|
994 | if (ino > INODES) {
|
---|
995 | printf("%s contains a bad inode number for file '%.*s'. ",
|
---|
996 | current_name, namelen, name);
|
---|
997 | if (ask("Remove", 1)) {
|
---|
998 | *(uint16_t *) (name - 2) = 0;
|
---|
999 | write_block(block, check_file_blk);
|
---|
1000 | }
|
---|
1001 | ino = 0;
|
---|
1002 | }
|
---|
1003 | push_filename(name);
|
---|
1004 | inode = get_inode(ino);
|
---|
1005 | pop_filename();
|
---|
1006 | if (!offset) {
|
---|
1007 | if (inode && LONE_CHAR(name, '.'))
|
---|
1008 | return;
|
---|
1009 | printf("%s: bad directory: '.' isn't first\n", current_name);
|
---|
1010 | errors_uncorrected = 1;
|
---|
1011 | }
|
---|
1012 | if (offset == dirsize) {
|
---|
1013 | if (inode && strcmp("..", name) == 0)
|
---|
1014 | return;
|
---|
1015 | printf("%s: bad directory: '..' isn't second\n", current_name);
|
---|
1016 | errors_uncorrected = 1;
|
---|
1017 | }
|
---|
1018 | if (!inode)
|
---|
1019 | return;
|
---|
1020 | push_filename(name);
|
---|
1021 | if (list) {
|
---|
1022 | if (verbose)
|
---|
1023 | printf("%6d %07o %3d ", ino, inode->i_mode, inode->i_nlinks);
|
---|
1024 | printf("%s%s\n", current_name, S_ISDIR(inode->i_mode) ? ":" : "");
|
---|
1025 | }
|
---|
1026 | check_zones(ino);
|
---|
1027 | if (inode && S_ISDIR(inode->i_mode))
|
---|
1028 | recursive_check(ino);
|
---|
1029 | pop_filename();
|
---|
1030 | }
|
---|
1031 |
|
---|
1032 | #if ENABLE_FEATURE_MINIX2
|
---|
1033 | static void check_file2(struct minix2_inode *dir, unsigned offset)
|
---|
1034 | {
|
---|
1035 | struct minix2_inode *inode;
|
---|
1036 | int ino;
|
---|
1037 | char *name;
|
---|
1038 | int block;
|
---|
1039 |
|
---|
1040 | block = map_block2(dir, offset / BLOCK_SIZE);
|
---|
1041 | read_block(block, check_file_blk);
|
---|
1042 | name = check_file_blk + (offset % BLOCK_SIZE) + 2;
|
---|
1043 | ino = *(uint16_t *) (name - 2);
|
---|
1044 | if (ino > INODES) {
|
---|
1045 | printf("%s contains a bad inode number for file '%.*s'. ",
|
---|
1046 | current_name, namelen, name);
|
---|
1047 | if (ask("Remove", 1)) {
|
---|
1048 | *(uint16_t *) (name - 2) = 0;
|
---|
1049 | write_block(block, check_file_blk);
|
---|
1050 | }
|
---|
1051 | ino = 0;
|
---|
1052 | }
|
---|
1053 | push_filename(name);
|
---|
1054 | inode = get_inode2(ino);
|
---|
1055 | pop_filename();
|
---|
1056 | if (!offset) {
|
---|
1057 | if (inode && LONE_CHAR(name, '.'))
|
---|
1058 | return;
|
---|
1059 | printf("%s: bad directory: '.' isn't first\n", current_name);
|
---|
1060 | errors_uncorrected = 1;
|
---|
1061 | }
|
---|
1062 | if (offset == dirsize) {
|
---|
1063 | if (inode && strcmp("..", name) == 0)
|
---|
1064 | return;
|
---|
1065 | printf("%s: bad directory: '..' isn't second\n", current_name);
|
---|
1066 | errors_uncorrected = 1;
|
---|
1067 | }
|
---|
1068 | if (!inode)
|
---|
1069 | return;
|
---|
1070 | push_filename(name);
|
---|
1071 | if (list) {
|
---|
1072 | if (verbose)
|
---|
1073 | printf("%6d %07o %3d ", ino, inode->i_mode, inode->i_nlinks);
|
---|
1074 | printf("%s%s\n", current_name, S_ISDIR(inode->i_mode) ? ":" : "");
|
---|
1075 | }
|
---|
1076 | check_zones2(ino);
|
---|
1077 | if (inode && S_ISDIR(inode->i_mode))
|
---|
1078 | recursive_check2(ino);
|
---|
1079 | pop_filename();
|
---|
1080 | }
|
---|
1081 | #endif
|
---|
1082 |
|
---|
1083 | static void recursive_check(unsigned ino)
|
---|
1084 | {
|
---|
1085 | struct minix1_inode *dir;
|
---|
1086 | unsigned offset;
|
---|
1087 |
|
---|
1088 | dir = Inode1 + ino;
|
---|
1089 | if (!S_ISDIR(dir->i_mode))
|
---|
1090 | die("internal error");
|
---|
1091 | if (dir->i_size < 2 * dirsize) {
|
---|
1092 | printf("%s: bad directory: size<32", current_name);
|
---|
1093 | errors_uncorrected = 1;
|
---|
1094 | }
|
---|
1095 | for (offset = 0; offset < dir->i_size; offset += dirsize)
|
---|
1096 | check_file(dir, offset);
|
---|
1097 | }
|
---|
1098 |
|
---|
1099 | #if ENABLE_FEATURE_MINIX2
|
---|
1100 | static void recursive_check2(unsigned ino)
|
---|
1101 | {
|
---|
1102 | struct minix2_inode *dir;
|
---|
1103 | unsigned offset;
|
---|
1104 |
|
---|
1105 | dir = Inode2 + ino;
|
---|
1106 | if (!S_ISDIR(dir->i_mode))
|
---|
1107 | die("internal error");
|
---|
1108 | if (dir->i_size < 2 * dirsize) {
|
---|
1109 | printf("%s: bad directory: size<32", current_name);
|
---|
1110 | errors_uncorrected = 1;
|
---|
1111 | }
|
---|
1112 | for (offset = 0; offset < dir->i_size; offset += dirsize)
|
---|
1113 | check_file2(dir, offset);
|
---|
1114 | }
|
---|
1115 | #endif
|
---|
1116 |
|
---|
1117 | static int bad_zone(int i)
|
---|
1118 | {
|
---|
1119 | char buffer[BLOCK_SIZE];
|
---|
1120 |
|
---|
1121 | if (BLOCK_SIZE * i != lseek(dev_fd, BLOCK_SIZE * i, SEEK_SET))
|
---|
1122 | die("seek failed in bad_zone");
|
---|
1123 | return (BLOCK_SIZE != read(dev_fd, buffer, BLOCK_SIZE));
|
---|
1124 | }
|
---|
1125 |
|
---|
1126 | static void check_counts(void)
|
---|
1127 | {
|
---|
1128 | int i;
|
---|
1129 |
|
---|
1130 | for (i = 1; i <= INODES; i++) {
|
---|
1131 | if (warn_mode && Inode1[i].i_mode && !inode_in_use(i)) {
|
---|
1132 | printf("Inode %d has non-zero mode. ", i);
|
---|
1133 | if (ask("Clear", 1)) {
|
---|
1134 | Inode1[i].i_mode = 0;
|
---|
1135 | changed = 1;
|
---|
1136 | }
|
---|
1137 | }
|
---|
1138 | if (!inode_count[i]) {
|
---|
1139 | if (!inode_in_use(i))
|
---|
1140 | continue;
|
---|
1141 | printf("Unused inode %d is marked as 'used' in the bitmap. ", i);
|
---|
1142 | if (ask("Clear", 1))
|
---|
1143 | unmark_inode(i);
|
---|
1144 | continue;
|
---|
1145 | }
|
---|
1146 | if (!inode_in_use(i)) {
|
---|
1147 | printf("Inode %d is used, but marked as 'unused' in the bitmap. ", i);
|
---|
1148 | if (ask("Set", 1))
|
---|
1149 | mark_inode(i);
|
---|
1150 | }
|
---|
1151 | if (Inode1[i].i_nlinks != inode_count[i]) {
|
---|
1152 | printf("Inode %d (mode=%07o), i_nlinks=%d, counted=%d. ",
|
---|
1153 | i, Inode1[i].i_mode, Inode1[i].i_nlinks,
|
---|
1154 | inode_count[i]);
|
---|
1155 | if (ask("Set i_nlinks to count", 1)) {
|
---|
1156 | Inode1[i].i_nlinks = inode_count[i];
|
---|
1157 | changed = 1;
|
---|
1158 | }
|
---|
1159 | }
|
---|
1160 | }
|
---|
1161 | for (i = FIRSTZONE; i < ZONES; i++) {
|
---|
1162 | if ((zone_in_use(i) != 0) == zone_count[i])
|
---|
1163 | continue;
|
---|
1164 | if (!zone_count[i]) {
|
---|
1165 | if (bad_zone(i))
|
---|
1166 | continue;
|
---|
1167 | printf("Zone %d is marked 'in use', but no file uses it. ", i);
|
---|
1168 | if (ask("Unmark", 1))
|
---|
1169 | unmark_zone(i);
|
---|
1170 | continue;
|
---|
1171 | }
|
---|
1172 | printf("Zone %d: %sin use, counted=%d\n",
|
---|
1173 | i, zone_in_use(i) ? "" : "not ", zone_count[i]);
|
---|
1174 | }
|
---|
1175 | }
|
---|
1176 |
|
---|
1177 | #if ENABLE_FEATURE_MINIX2
|
---|
1178 | static void check_counts2(void)
|
---|
1179 | {
|
---|
1180 | int i;
|
---|
1181 |
|
---|
1182 | for (i = 1; i <= INODES; i++) {
|
---|
1183 | if (warn_mode && Inode2[i].i_mode && !inode_in_use(i)) {
|
---|
1184 | printf("Inode %d has non-zero mode. ", i);
|
---|
1185 | if (ask("Clear", 1)) {
|
---|
1186 | Inode2[i].i_mode = 0;
|
---|
1187 | changed = 1;
|
---|
1188 | }
|
---|
1189 | }
|
---|
1190 | if (!inode_count[i]) {
|
---|
1191 | if (!inode_in_use(i))
|
---|
1192 | continue;
|
---|
1193 | printf("Unused inode %d is marked as 'used' in the bitmap. ", i);
|
---|
1194 | if (ask("Clear", 1))
|
---|
1195 | unmark_inode(i);
|
---|
1196 | continue;
|
---|
1197 | }
|
---|
1198 | if (!inode_in_use(i)) {
|
---|
1199 | printf("Inode %d is used, but marked as 'unused' in the bitmap. ", i);
|
---|
1200 | if (ask("Set", 1))
|
---|
1201 | mark_inode(i);
|
---|
1202 | }
|
---|
1203 | if (Inode2[i].i_nlinks != inode_count[i]) {
|
---|
1204 | printf("Inode %d (mode=%07o), i_nlinks=%d, counted=%d. ",
|
---|
1205 | i, Inode2[i].i_mode, Inode2[i].i_nlinks,
|
---|
1206 | inode_count[i]);
|
---|
1207 | if (ask("Set i_nlinks to count", 1)) {
|
---|
1208 | Inode2[i].i_nlinks = inode_count[i];
|
---|
1209 | changed = 1;
|
---|
1210 | }
|
---|
1211 | }
|
---|
1212 | }
|
---|
1213 | for (i = FIRSTZONE; i < ZONES; i++) {
|
---|
1214 | if ((zone_in_use(i) != 0) == zone_count[i])
|
---|
1215 | continue;
|
---|
1216 | if (!zone_count[i]) {
|
---|
1217 | if (bad_zone(i))
|
---|
1218 | continue;
|
---|
1219 | printf("Zone %d is marked 'in use', but no file uses it. ", i);
|
---|
1220 | if (ask("Unmark", 1))
|
---|
1221 | unmark_zone(i);
|
---|
1222 | continue;
|
---|
1223 | }
|
---|
1224 | printf("Zone %d: %sin use, counted=%d\n",
|
---|
1225 | i, zone_in_use(i) ? "" : "not ", zone_count[i]);
|
---|
1226 | }
|
---|
1227 | }
|
---|
1228 | #endif
|
---|
1229 |
|
---|
1230 | static void check(void)
|
---|
1231 | {
|
---|
1232 | memset(inode_count, 0, (INODES + 1) * sizeof(*inode_count));
|
---|
1233 | memset(zone_count, 0, ZONES * sizeof(*zone_count));
|
---|
1234 | check_zones(MINIX_ROOT_INO);
|
---|
1235 | recursive_check(MINIX_ROOT_INO);
|
---|
1236 | check_counts();
|
---|
1237 | }
|
---|
1238 |
|
---|
1239 | #if ENABLE_FEATURE_MINIX2
|
---|
1240 | static void check2(void)
|
---|
1241 | {
|
---|
1242 | memset(inode_count, 0, (INODES + 1) * sizeof(*inode_count));
|
---|
1243 | memset(zone_count, 0, ZONES * sizeof(*zone_count));
|
---|
1244 | check_zones2(MINIX_ROOT_INO);
|
---|
1245 | recursive_check2(MINIX_ROOT_INO);
|
---|
1246 | check_counts2();
|
---|
1247 | }
|
---|
1248 | #else
|
---|
1249 | void check2(void);
|
---|
1250 | #endif
|
---|
1251 |
|
---|
1252 | int fsck_minix_main(int argc, char **argv);
|
---|
1253 | int fsck_minix_main(int argc, char **argv)
|
---|
1254 | {
|
---|
1255 | struct termios tmp;
|
---|
1256 | int retcode = 0;
|
---|
1257 |
|
---|
1258 | xfunc_error_retval = 8;
|
---|
1259 |
|
---|
1260 | INIT_G();
|
---|
1261 |
|
---|
1262 | if (INODE_SIZE1 * MINIX1_INODES_PER_BLOCK != BLOCK_SIZE)
|
---|
1263 | die("bad inode size");
|
---|
1264 | #if ENABLE_FEATURE_MINIX2
|
---|
1265 | if (INODE_SIZE2 * MINIX2_INODES_PER_BLOCK != BLOCK_SIZE)
|
---|
1266 | die("bad v2 inode size");
|
---|
1267 | #endif
|
---|
1268 | while (--argc != 0) {
|
---|
1269 | argv++;
|
---|
1270 | if (argv[0][0] != '-') {
|
---|
1271 | if (device_name)
|
---|
1272 | bb_show_usage();
|
---|
1273 | device_name = argv[0];
|
---|
1274 | } else {
|
---|
1275 | while (*++argv[0]) {
|
---|
1276 | switch (argv[0][0]) {
|
---|
1277 | case 'l':
|
---|
1278 | list = 1;
|
---|
1279 | break;
|
---|
1280 | case 'a':
|
---|
1281 | automatic = 1;
|
---|
1282 | repair = 1;
|
---|
1283 | break;
|
---|
1284 | case 'r':
|
---|
1285 | automatic = 0;
|
---|
1286 | repair = 1;
|
---|
1287 | break;
|
---|
1288 | case 'v':
|
---|
1289 | verbose = 1;
|
---|
1290 | break;
|
---|
1291 | case 's':
|
---|
1292 | show = 1;
|
---|
1293 | break;
|
---|
1294 | case 'm':
|
---|
1295 | warn_mode = 1;
|
---|
1296 | break;
|
---|
1297 | case 'f':
|
---|
1298 | force = 1;
|
---|
1299 | break;
|
---|
1300 | default:
|
---|
1301 | bb_show_usage();
|
---|
1302 | }
|
---|
1303 | }
|
---|
1304 | }
|
---|
1305 | }
|
---|
1306 | if (!device_name)
|
---|
1307 | bb_show_usage();
|
---|
1308 |
|
---|
1309 | check_mount(); /* trying to check a mounted filesystem? */
|
---|
1310 | if (repair && !automatic) {
|
---|
1311 | if (!isatty(0) || !isatty(1))
|
---|
1312 | die("need terminal for interactive repairs");
|
---|
1313 | }
|
---|
1314 | dev_fd = xopen(device_name, repair ? O_RDWR : O_RDONLY);
|
---|
1315 |
|
---|
1316 | /*sync(); paranoia? */
|
---|
1317 | read_superblock();
|
---|
1318 |
|
---|
1319 | /*
|
---|
1320 | * Determine whether or not we should continue with the checking.
|
---|
1321 | * This is based on the status of the filesystem valid and error
|
---|
1322 | * flags and whether or not the -f switch was specified on the
|
---|
1323 | * command line.
|
---|
1324 | */
|
---|
1325 | printf("%s: %s\n", applet_name, bb_banner);
|
---|
1326 |
|
---|
1327 | if (!(Super.s_state & MINIX_ERROR_FS)
|
---|
1328 | && (Super.s_state & MINIX_VALID_FS) && !force
|
---|
1329 | ) {
|
---|
1330 | if (repair)
|
---|
1331 | printf("%s is clean, check is skipped\n", device_name);
|
---|
1332 | return 0;
|
---|
1333 | } else if (force)
|
---|
1334 | printf("Forcing filesystem check on %s\n", device_name);
|
---|
1335 | else if (repair)
|
---|
1336 | printf("Filesystem on %s is dirty, needs checking\n",
|
---|
1337 | device_name);
|
---|
1338 |
|
---|
1339 | read_tables();
|
---|
1340 |
|
---|
1341 | if (repair && !automatic) {
|
---|
1342 | tcgetattr(0, &sv_termios);
|
---|
1343 | tmp = sv_termios;
|
---|
1344 | tmp.c_lflag &= ~(ICANON | ECHO);
|
---|
1345 | tcsetattr(0, TCSANOW, &tmp);
|
---|
1346 | termios_set = 1;
|
---|
1347 | }
|
---|
1348 |
|
---|
1349 | if (version2) {
|
---|
1350 | check_root2();
|
---|
1351 | check2();
|
---|
1352 | } else {
|
---|
1353 | check_root();
|
---|
1354 | check();
|
---|
1355 | }
|
---|
1356 |
|
---|
1357 | if (verbose) {
|
---|
1358 | int i, free_cnt;
|
---|
1359 |
|
---|
1360 | for (i = 1, free_cnt = 0; i <= INODES; i++)
|
---|
1361 | if (!inode_in_use(i))
|
---|
1362 | free_cnt++;
|
---|
1363 | printf("\n%6u inodes used (%u%%)\n", (INODES - free_cnt),
|
---|
1364 | 100 * (INODES - free_cnt) / INODES);
|
---|
1365 | for (i = FIRSTZONE, free_cnt = 0; i < ZONES; i++)
|
---|
1366 | if (!zone_in_use(i))
|
---|
1367 | free_cnt++;
|
---|
1368 | printf("%6u zones used (%u%%)\n\n"
|
---|
1369 | "%6u regular files\n"
|
---|
1370 | "%6u directories\n"
|
---|
1371 | "%6u character device files\n"
|
---|
1372 | "%6u block device files\n"
|
---|
1373 | "%6u links\n"
|
---|
1374 | "%6u symbolic links\n"
|
---|
1375 | "------\n"
|
---|
1376 | "%6u files\n",
|
---|
1377 | (ZONES - free_cnt), 100 * (ZONES - free_cnt) / ZONES,
|
---|
1378 | regular, directory, chardev, blockdev,
|
---|
1379 | links - 2 * directory + 1, symlinks,
|
---|
1380 | total - 2 * directory + 1);
|
---|
1381 | }
|
---|
1382 | if (changed) {
|
---|
1383 | write_tables();
|
---|
1384 | printf("FILE SYSTEM HAS BEEN CHANGED\n");
|
---|
1385 | sync();
|
---|
1386 | } else if (repair)
|
---|
1387 | write_super_block();
|
---|
1388 |
|
---|
1389 | if (repair && !automatic)
|
---|
1390 | tcsetattr(0, TCSANOW, &sv_termios);
|
---|
1391 |
|
---|
1392 | if (changed)
|
---|
1393 | retcode += 3;
|
---|
1394 | if (errors_uncorrected)
|
---|
1395 | retcode += 4;
|
---|
1396 | return retcode;
|
---|
1397 | }
|
---|