1 | /* vi: set sw=4 ts=4: */
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2 | /*
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3 | * fsck --- A generic, parallelizing front-end for the fsck program.
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4 | * It will automatically try to run fsck programs in parallel if the
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5 | * devices are on separate spindles. It is based on the same ideas as
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6 | * the generic front end for fsck by David Engel and Fred van Kempen,
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7 | * but it has been completely rewritten from scratch to support
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8 | * parallel execution.
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9 | *
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10 | * Written by Theodore Ts'o, <tytso@mit.edu>
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11 | *
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12 | * Miquel van Smoorenburg (miquels@drinkel.ow.org) 20-Oct-1994:
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13 | * o Changed -t fstype to behave like with mount when -A (all file
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14 | * systems) or -M (like mount) is specified.
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15 | * o fsck looks if it can find the fsck.type program to decide
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16 | * if it should ignore the fs type. This way more fsck programs
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17 | * can be added without changing this front-end.
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18 | * o -R flag skip root file system.
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19 | *
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20 | * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
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21 | * 2001, 2002, 2003, 2004, 2005 by Theodore Ts'o.
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22 | *
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23 | * Licensed under GPLv2, see file LICENSE in this source tree.
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24 | */
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25 |
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26 | /* All filesystem specific hooks have been removed.
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27 | * If filesystem cannot be determined, we will execute
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28 | * "fsck.auto". Currently this also happens if you specify
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29 | * UUID=xxx or LABEL=xxx as an object to check.
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30 | * Detection code for that is also probably has to be in fsck.auto.
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31 | *
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32 | * In other words, this is _really_ is just a driver program which
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33 | * spawns actual fsck.something for each filesystem to check.
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34 | * It doesn't guess filesystem types from on-disk format.
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35 | */
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36 |
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37 | //usage:#define fsck_trivial_usage
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38 | //usage: "[-ANPRTV] [-C FD] [-t FSTYPE] [FS_OPTS] [BLOCKDEV]..."
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39 | //usage:#define fsck_full_usage "\n\n"
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40 | //usage: "Check and repair filesystems\n"
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41 | //usage: "\n -A Walk /etc/fstab and check all filesystems"
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42 | //usage: "\n -N Don't execute, just show what would be done"
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43 | //usage: "\n -P With -A, check filesystems in parallel"
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44 | //usage: "\n -R With -A, skip the root filesystem"
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45 | //usage: "\n -T Don't show title on startup"
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46 | //usage: "\n -V Verbose"
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47 | //usage: "\n -C n Write status information to specified filedescriptor"
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48 | //usage: "\n -t TYPE List of filesystem types to check"
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49 |
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50 | #include "libbb.h"
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51 |
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52 | /* "progress indicator" code is somewhat buggy and ext[23] specific.
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53 | * We should be filesystem agnostic. IOW: there should be a well-defined
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54 | * API for fsck.something, NOT ad-hoc hacks in generic fsck. */
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55 | #define DO_PROGRESS_INDICATOR 0
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56 |
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57 | /* fsck 1.41.4 (27-Jan-2009) manpage says:
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58 | * 0 - No errors
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59 | * 1 - File system errors corrected
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60 | * 2 - System should be rebooted
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61 | * 4 - File system errors left uncorrected
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62 | * 8 - Operational error
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63 | * 16 - Usage or syntax error
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64 | * 32 - Fsck canceled by user request
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65 | * 128 - Shared library error
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66 | */
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67 | #define EXIT_OK 0
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68 | #define EXIT_NONDESTRUCT 1
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69 | #define EXIT_DESTRUCT 2
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70 | #define EXIT_UNCORRECTED 4
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71 | #define EXIT_ERROR 8
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72 | #define EXIT_USAGE 16
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73 | #define FSCK_CANCELED 32 /* Aborted with a signal or ^C */
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74 |
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75 | /*
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76 | * Internal structure for mount table entries.
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77 | */
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78 | struct fs_info {
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79 | struct fs_info *next;
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80 | char *device;
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81 | char *mountpt;
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82 | char *type;
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83 | char *opts;
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84 | int passno;
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85 | int flags;
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86 | };
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87 |
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88 | #define FLAG_DONE 1
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89 | #define FLAG_PROGRESS 2
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90 | /*
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91 | * Structure to allow exit codes to be stored
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92 | */
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93 | struct fsck_instance {
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94 | struct fsck_instance *next;
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95 | int pid;
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96 | int flags;
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97 | #if DO_PROGRESS_INDICATOR
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98 | time_t start_time;
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99 | #endif
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100 | char *prog;
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101 | char *device;
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102 | char *base_device; /* /dev/hda for /dev/hdaN etc */
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103 | };
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104 |
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105 | static const char ignored_types[] ALIGN1 =
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106 | "ignore\0"
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107 | "iso9660\0"
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108 | "nfs\0"
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109 | "proc\0"
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110 | "sw\0"
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111 | "swap\0"
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112 | "tmpfs\0"
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113 | "devpts\0";
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114 |
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115 | #if 0
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116 | static const char really_wanted[] ALIGN1 =
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117 | "minix\0"
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118 | "ext2\0"
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119 | "ext3\0"
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120 | "jfs\0"
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121 | "reiserfs\0"
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122 | "xiafs\0"
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123 | "xfs\0";
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124 | #endif
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125 |
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126 | #define BASE_MD "/dev/md"
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127 |
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128 | static char **args;
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129 | static int num_args;
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130 | static int verbose;
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131 |
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132 | #define FS_TYPE_FLAG_NORMAL 0
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133 | #define FS_TYPE_FLAG_OPT 1
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134 | #define FS_TYPE_FLAG_NEGOPT 2
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135 | static char **fs_type_list;
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136 | static uint8_t *fs_type_flag;
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137 | static smallint fs_type_negated;
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138 |
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139 | static smallint noexecute;
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140 | static smallint serialize;
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141 | static smallint skip_root;
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142 | /* static smallint like_mount; */
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143 | static smallint parallel_root;
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144 | static smallint force_all_parallel;
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145 |
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146 | #if DO_PROGRESS_INDICATOR
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147 | static smallint progress;
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148 | static int progress_fd;
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149 | #endif
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150 |
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151 | static int num_running;
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152 | static int max_running;
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153 | static char *fstype;
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154 | static struct fs_info *filesys_info;
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155 | static struct fs_info *filesys_last;
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156 | static struct fsck_instance *instance_list;
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157 |
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158 | /*
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159 | * Return the "base device" given a particular device; this is used to
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160 | * assure that we only fsck one partition on a particular drive at any
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161 | * one time. Otherwise, the disk heads will be seeking all over the
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162 | * place. If the base device cannot be determined, return NULL.
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163 | *
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164 | * The base_device() function returns an allocated string which must
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165 | * be freed.
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166 | */
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167 | #if ENABLE_FEATURE_DEVFS
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168 | /*
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169 | * Required for the uber-silly devfs /dev/ide/host1/bus2/target3/lun3
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170 | * pathames.
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171 | */
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172 | static const char *const devfs_hier[] = {
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173 | "host", "bus", "target", "lun", NULL
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174 | };
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175 | #endif
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176 |
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177 | static char *base_device(const char *device)
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178 | {
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179 | char *str, *cp;
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180 | #if ENABLE_FEATURE_DEVFS
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181 | const char *const *hier;
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182 | const char *disk;
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183 | int len;
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184 | #endif
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185 | str = xstrdup(device);
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186 |
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187 | /* Skip over "/dev/"; if it's not present, give up */
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188 | cp = skip_dev_pfx(str);
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189 | if (cp == str)
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190 | goto errout;
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191 |
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192 | /*
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193 | * For md devices, we treat them all as if they were all
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194 | * on one disk, since we don't know how to parallelize them.
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195 | */
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196 | if (cp[0] == 'm' && cp[1] == 'd') {
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197 | cp[2] = 0;
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198 | return str;
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199 | }
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200 |
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201 | /* Handle DAC 960 devices */
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202 | if (strncmp(cp, "rd/", 3) == 0) {
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203 | cp += 3;
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204 | if (cp[0] != 'c' || !isdigit(cp[1])
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205 | || cp[2] != 'd' || !isdigit(cp[3]))
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206 | goto errout;
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207 | cp[4] = 0;
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208 | return str;
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209 | }
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210 |
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211 | /* Now let's handle /dev/hd* and /dev/sd* devices.... */
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212 | if ((cp[0] == 'h' || cp[0] == 's') && cp[1] == 'd') {
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213 | cp += 2;
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214 | /* If there's a single number after /dev/hd, skip it */
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215 | if (isdigit(*cp))
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216 | cp++;
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217 | /* What follows must be an alpha char, or give up */
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218 | if (!isalpha(*cp))
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219 | goto errout;
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220 | cp[1] = 0;
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221 | return str;
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222 | }
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223 |
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224 | #if ENABLE_FEATURE_DEVFS
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225 | /* Now let's handle devfs (ugh) names */
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226 | len = 0;
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227 | if (strncmp(cp, "ide/", 4) == 0)
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228 | len = 4;
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229 | if (strncmp(cp, "scsi/", 5) == 0)
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230 | len = 5;
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231 | if (len) {
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232 | cp += len;
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233 | /*
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234 | * Now we proceed down the expected devfs hierarchy.
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235 | * i.e., .../host1/bus2/target3/lun4/...
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236 | * If we don't find the expected token, followed by
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237 | * some number of digits at each level, abort.
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238 | */
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239 | for (hier = devfs_hier; *hier; hier++) {
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240 | len = strlen(*hier);
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241 | if (strncmp(cp, *hier, len) != 0)
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242 | goto errout;
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243 | cp += len;
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244 | while (*cp != '/' && *cp != 0) {
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245 | if (!isdigit(*cp))
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246 | goto errout;
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247 | cp++;
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248 | }
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249 | cp++;
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250 | }
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251 | cp[-1] = 0;
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252 | return str;
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253 | }
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254 |
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255 | /* Now handle devfs /dev/disc or /dev/disk names */
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256 | disk = 0;
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257 | if (strncmp(cp, "discs/", 6) == 0)
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258 | disk = "disc";
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259 | else if (strncmp(cp, "disks/", 6) == 0)
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260 | disk = "disk";
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261 | if (disk) {
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262 | cp += 6;
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263 | if (strncmp(cp, disk, 4) != 0)
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264 | goto errout;
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265 | cp += 4;
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266 | while (*cp != '/' && *cp != 0) {
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267 | if (!isdigit(*cp))
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268 | goto errout;
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269 | cp++;
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270 | }
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271 | *cp = 0;
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272 | return str;
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273 | }
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274 | #endif
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275 | errout:
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276 | free(str);
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277 | return NULL;
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278 | }
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279 |
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280 | static void free_instance(struct fsck_instance *p)
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281 | {
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282 | free(p->prog);
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283 | free(p->device);
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284 | free(p->base_device);
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285 | free(p);
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286 | }
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287 |
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288 | static struct fs_info *create_fs_device(const char *device, const char *mntpnt,
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289 | const char *type, const char *opts,
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290 | int passno)
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291 | {
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292 | struct fs_info *fs;
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293 |
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294 | fs = xzalloc(sizeof(*fs));
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295 | fs->device = xstrdup(device);
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296 | fs->mountpt = xstrdup(mntpnt);
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297 | if (strchr(type, ','))
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298 | type = (char *)"auto";
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299 | fs->type = xstrdup(type);
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300 | fs->opts = xstrdup(opts ? opts : "");
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301 | fs->passno = passno < 0 ? 1 : passno;
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302 | /*fs->flags = 0; */
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303 | /*fs->next = NULL; */
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304 |
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305 | if (!filesys_info)
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306 | filesys_info = fs;
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307 | else
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308 | filesys_last->next = fs;
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309 | filesys_last = fs;
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310 |
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311 | return fs;
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312 | }
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313 |
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314 | /* Load the filesystem database from /etc/fstab */
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315 | static void load_fs_info(const char *filename)
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316 | {
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317 | FILE *fstab;
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318 | struct mntent mte;
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319 |
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320 | fstab = setmntent(filename, "r");
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321 | if (!fstab) {
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322 | bb_perror_msg("can't read '%s'", filename);
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323 | return;
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324 | }
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325 |
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326 | // Loop through entries
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327 | while (getmntent_r(fstab, &mte, bb_common_bufsiz1, COMMON_BUFSIZE)) {
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328 | //bb_info_msg("CREATE[%s][%s][%s][%s][%d]", mte.mnt_fsname, mte.mnt_dir,
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329 | // mte.mnt_type, mte.mnt_opts,
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330 | // mte.mnt_passno);
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331 | create_fs_device(mte.mnt_fsname, mte.mnt_dir,
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332 | mte.mnt_type, mte.mnt_opts,
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333 | mte.mnt_passno);
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334 | }
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335 | endmntent(fstab);
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336 | }
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337 |
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338 | /* Lookup filesys in /etc/fstab and return the corresponding entry. */
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339 | static struct fs_info *lookup(char *filesys)
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340 | {
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341 | struct fs_info *fs;
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342 |
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343 | for (fs = filesys_info; fs; fs = fs->next) {
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344 | if (strcmp(filesys, fs->device) == 0
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345 | || (fs->mountpt && strcmp(filesys, fs->mountpt) == 0)
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346 | )
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347 | break;
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348 | }
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349 |
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350 | return fs;
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351 | }
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352 |
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353 | #if DO_PROGRESS_INDICATOR
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354 | static int progress_active(void)
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355 | {
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356 | struct fsck_instance *inst;
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357 |
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358 | for (inst = instance_list; inst; inst = inst->next) {
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359 | if (inst->flags & FLAG_DONE)
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360 | continue;
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361 | if (inst->flags & FLAG_PROGRESS)
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362 | return 1;
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363 | }
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364 | return 0;
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365 | }
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366 | #endif
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367 |
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368 |
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369 | /*
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370 | * Send a signal to all outstanding fsck child processes
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371 | */
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372 | static void kill_all_if_got_signal(void)
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373 | {
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374 | static smallint kill_sent;
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375 |
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376 | struct fsck_instance *inst;
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377 |
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378 | if (!bb_got_signal || kill_sent)
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379 | return;
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380 |
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381 | for (inst = instance_list; inst; inst = inst->next) {
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382 | if (inst->flags & FLAG_DONE)
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383 | continue;
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384 | kill(inst->pid, SIGTERM);
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385 | }
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386 | kill_sent = 1;
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387 | }
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388 |
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389 | /*
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390 | * Wait for one child process to exit; when it does, unlink it from
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391 | * the list of executing child processes, free, and return its exit status.
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392 | * If there is no exited child, return -1.
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393 | */
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394 | static int wait_one(int flags)
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395 | {
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396 | int status;
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397 | int sig;
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398 | struct fsck_instance *inst, *prev;
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399 | pid_t pid;
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400 |
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401 | if (!instance_list)
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402 | return -1;
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403 | /* if (noexecute) { already returned -1; } */
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404 |
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405 | while (1) {
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406 | pid = waitpid(-1, &status, flags);
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407 | kill_all_if_got_signal();
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408 | if (pid == 0) /* flags == WNOHANG and no children exited */
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409 | return -1;
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410 | if (pid < 0) {
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411 | if (errno == EINTR)
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412 | continue;
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413 | if (errno == ECHILD) { /* paranoia */
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414 | bb_error_msg("wait: no more children");
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415 | return -1;
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416 | }
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417 | bb_perror_msg("wait");
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418 | continue;
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419 | }
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420 | prev = NULL;
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421 | inst = instance_list;
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422 | do {
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423 | if (inst->pid == pid)
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424 | goto child_died;
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425 | prev = inst;
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426 | inst = inst->next;
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427 | } while (inst);
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428 | }
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429 | child_died:
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430 |
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431 | if (WIFEXITED(status))
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432 | status = WEXITSTATUS(status);
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433 | else if (WIFSIGNALED(status)) {
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434 | sig = WTERMSIG(status);
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435 | status = EXIT_UNCORRECTED;
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436 | if (sig != SIGINT) {
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437 | printf("Warning: %s %s terminated "
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438 | "by signal %d\n",
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439 | inst->prog, inst->device, sig);
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440 | status = EXIT_ERROR;
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441 | }
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442 | } else {
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443 | printf("%s %s: status is %x, should never happen\n",
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444 | inst->prog, inst->device, status);
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445 | status = EXIT_ERROR;
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446 | }
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447 |
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448 | #if DO_PROGRESS_INDICATOR
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449 | if (progress && (inst->flags & FLAG_PROGRESS) && !progress_active()) {
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450 | struct fsck_instance *inst2;
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451 | for (inst2 = instance_list; inst2; inst2 = inst2->next) {
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452 | if (inst2->flags & FLAG_DONE)
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453 | continue;
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454 | if (strcmp(inst2->type, "ext2") != 0
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455 | && strcmp(inst2->type, "ext3") != 0
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456 | ) {
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457 | continue;
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458 | }
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459 | /* ext[23], we will send USR1
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460 | * (request to start displaying progress bar)
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461 | *
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462 | * If we've just started the fsck, wait a tiny
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463 | * bit before sending the kill, to give it
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464 | * time to set up the signal handler
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465 | */
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466 | if (inst2->start_time >= time(NULL) - 1)
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467 | sleep(1);
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468 | kill(inst2->pid, SIGUSR1);
|
---|
469 | inst2->flags |= FLAG_PROGRESS;
|
---|
470 | break;
|
---|
471 | }
|
---|
472 | }
|
---|
473 | #endif
|
---|
474 |
|
---|
475 | if (prev)
|
---|
476 | prev->next = inst->next;
|
---|
477 | else
|
---|
478 | instance_list = inst->next;
|
---|
479 | if (verbose > 1)
|
---|
480 | printf("Finished with %s (exit status %d)\n",
|
---|
481 | inst->device, status);
|
---|
482 | num_running--;
|
---|
483 | free_instance(inst);
|
---|
484 |
|
---|
485 | return status;
|
---|
486 | }
|
---|
487 |
|
---|
488 | /*
|
---|
489 | * Wait until all executing child processes have exited; return the
|
---|
490 | * logical OR of all of their exit code values.
|
---|
491 | */
|
---|
492 | #define FLAG_WAIT_ALL 0
|
---|
493 | #define FLAG_WAIT_ATLEAST_ONE WNOHANG
|
---|
494 | static int wait_many(int flags)
|
---|
495 | {
|
---|
496 | int exit_status;
|
---|
497 | int global_status = 0;
|
---|
498 | int wait_flags = 0;
|
---|
499 |
|
---|
500 | while ((exit_status = wait_one(wait_flags)) != -1) {
|
---|
501 | global_status |= exit_status;
|
---|
502 | wait_flags |= flags;
|
---|
503 | }
|
---|
504 | return global_status;
|
---|
505 | }
|
---|
506 |
|
---|
507 | /*
|
---|
508 | * Execute a particular fsck program, and link it into the list of
|
---|
509 | * child processes we are waiting for.
|
---|
510 | */
|
---|
511 | static void execute(const char *type, const char *device,
|
---|
512 | const char *mntpt /*, int interactive */)
|
---|
513 | {
|
---|
514 | int i;
|
---|
515 | struct fsck_instance *inst;
|
---|
516 | pid_t pid;
|
---|
517 |
|
---|
518 | args[0] = xasprintf("fsck.%s", type);
|
---|
519 |
|
---|
520 | #if DO_PROGRESS_INDICATOR
|
---|
521 | if (progress && !progress_active()) {
|
---|
522 | if (strcmp(type, "ext2") == 0
|
---|
523 | || strcmp(type, "ext3") == 0
|
---|
524 | ) {
|
---|
525 | args[XXX] = xasprintf("-C%d", progress_fd); /* 1 */
|
---|
526 | inst->flags |= FLAG_PROGRESS;
|
---|
527 | }
|
---|
528 | }
|
---|
529 | #endif
|
---|
530 |
|
---|
531 | args[num_args - 2] = (char*)device;
|
---|
532 | /* args[num_args - 1] = NULL; - already is */
|
---|
533 |
|
---|
534 | if (verbose || noexecute) {
|
---|
535 | printf("[%s (%d) -- %s]", args[0], num_running,
|
---|
536 | mntpt ? mntpt : device);
|
---|
537 | for (i = 0; args[i]; i++)
|
---|
538 | printf(" %s", args[i]);
|
---|
539 | bb_putchar('\n');
|
---|
540 | }
|
---|
541 |
|
---|
542 | /* Fork and execute the correct program. */
|
---|
543 | pid = -1;
|
---|
544 | if (!noexecute) {
|
---|
545 | pid = spawn(args);
|
---|
546 | if (pid < 0)
|
---|
547 | bb_simple_perror_msg(args[0]);
|
---|
548 | }
|
---|
549 |
|
---|
550 | #if DO_PROGRESS_INDICATOR
|
---|
551 | free(args[XXX]);
|
---|
552 | #endif
|
---|
553 |
|
---|
554 | /* No child, so don't record an instance */
|
---|
555 | if (pid <= 0) {
|
---|
556 | free(args[0]);
|
---|
557 | return;
|
---|
558 | }
|
---|
559 |
|
---|
560 | inst = xzalloc(sizeof(*inst));
|
---|
561 | inst->pid = pid;
|
---|
562 | inst->prog = args[0];
|
---|
563 | inst->device = xstrdup(device);
|
---|
564 | inst->base_device = base_device(device);
|
---|
565 | #if DO_PROGRESS_INDICATOR
|
---|
566 | inst->start_time = time(NULL);
|
---|
567 | #endif
|
---|
568 |
|
---|
569 | /* Add to the list of running fsck's.
|
---|
570 | * (was adding to the end, but adding to the front is simpler...) */
|
---|
571 | inst->next = instance_list;
|
---|
572 | instance_list = inst;
|
---|
573 | }
|
---|
574 |
|
---|
575 | /*
|
---|
576 | * Run the fsck program on a particular device
|
---|
577 | *
|
---|
578 | * If the type is specified using -t, and it isn't prefixed with "no"
|
---|
579 | * (as in "noext2") and only one filesystem type is specified, then
|
---|
580 | * use that type regardless of what is specified in /etc/fstab.
|
---|
581 | *
|
---|
582 | * If the type isn't specified by the user, then use either the type
|
---|
583 | * specified in /etc/fstab, or "auto".
|
---|
584 | */
|
---|
585 | static void fsck_device(struct fs_info *fs /*, int interactive */)
|
---|
586 | {
|
---|
587 | const char *type;
|
---|
588 |
|
---|
589 | if (strcmp(fs->type, "auto") != 0) {
|
---|
590 | type = fs->type;
|
---|
591 | if (verbose > 2)
|
---|
592 | bb_info_msg("using filesystem type '%s' %s",
|
---|
593 | type, "from fstab");
|
---|
594 | } else if (fstype
|
---|
595 | && (fstype[0] != 'n' || fstype[1] != 'o') /* != "no" */
|
---|
596 | && strncmp(fstype, "opts=", 5) != 0
|
---|
597 | && strncmp(fstype, "loop", 4) != 0
|
---|
598 | && !strchr(fstype, ',')
|
---|
599 | ) {
|
---|
600 | type = fstype;
|
---|
601 | if (verbose > 2)
|
---|
602 | bb_info_msg("using filesystem type '%s' %s",
|
---|
603 | type, "from -t");
|
---|
604 | } else {
|
---|
605 | type = "auto";
|
---|
606 | if (verbose > 2)
|
---|
607 | bb_info_msg("using filesystem type '%s' %s",
|
---|
608 | type, "(default)");
|
---|
609 | }
|
---|
610 |
|
---|
611 | num_running++;
|
---|
612 | execute(type, fs->device, fs->mountpt /*, interactive */);
|
---|
613 | }
|
---|
614 |
|
---|
615 | /*
|
---|
616 | * Returns TRUE if a partition on the same disk is already being
|
---|
617 | * checked.
|
---|
618 | */
|
---|
619 | static int device_already_active(char *device)
|
---|
620 | {
|
---|
621 | struct fsck_instance *inst;
|
---|
622 | char *base;
|
---|
623 |
|
---|
624 | if (force_all_parallel)
|
---|
625 | return 0;
|
---|
626 |
|
---|
627 | #ifdef BASE_MD
|
---|
628 | /* Don't check a soft raid disk with any other disk */
|
---|
629 | if (instance_list
|
---|
630 | && (!strncmp(instance_list->device, BASE_MD, sizeof(BASE_MD)-1)
|
---|
631 | || !strncmp(device, BASE_MD, sizeof(BASE_MD)-1))
|
---|
632 | ) {
|
---|
633 | return 1;
|
---|
634 | }
|
---|
635 | #endif
|
---|
636 |
|
---|
637 | base = base_device(device);
|
---|
638 | /*
|
---|
639 | * If we don't know the base device, assume that the device is
|
---|
640 | * already active if there are any fsck instances running.
|
---|
641 | */
|
---|
642 | if (!base)
|
---|
643 | return (instance_list != NULL);
|
---|
644 |
|
---|
645 | for (inst = instance_list; inst; inst = inst->next) {
|
---|
646 | if (!inst->base_device || !strcmp(base, inst->base_device)) {
|
---|
647 | free(base);
|
---|
648 | return 1;
|
---|
649 | }
|
---|
650 | }
|
---|
651 |
|
---|
652 | free(base);
|
---|
653 | return 0;
|
---|
654 | }
|
---|
655 |
|
---|
656 | /*
|
---|
657 | * This function returns true if a particular option appears in a
|
---|
658 | * comma-delimited options list
|
---|
659 | */
|
---|
660 | static int opt_in_list(char *opt, char *optlist)
|
---|
661 | {
|
---|
662 | char *s;
|
---|
663 | int len;
|
---|
664 |
|
---|
665 | if (!optlist)
|
---|
666 | return 0;
|
---|
667 |
|
---|
668 | len = strlen(opt);
|
---|
669 | s = optlist - 1;
|
---|
670 | while (1) {
|
---|
671 | s = strstr(s + 1, opt);
|
---|
672 | if (!s)
|
---|
673 | return 0;
|
---|
674 | /* neither "opt.." nor "xxx,opt.."? */
|
---|
675 | if (s != optlist && s[-1] != ',')
|
---|
676 | continue;
|
---|
677 | /* neither "..opt" nor "..opt,xxx"? */
|
---|
678 | if (s[len] != '\0' && s[len] != ',')
|
---|
679 | continue;
|
---|
680 | return 1;
|
---|
681 | }
|
---|
682 | }
|
---|
683 |
|
---|
684 | /* See if the filesystem matches the criteria given by the -t option */
|
---|
685 | static int fs_match(struct fs_info *fs)
|
---|
686 | {
|
---|
687 | int n, ret, checked_type;
|
---|
688 | char *cp;
|
---|
689 |
|
---|
690 | if (!fs_type_list)
|
---|
691 | return 1;
|
---|
692 |
|
---|
693 | ret = 0;
|
---|
694 | checked_type = 0;
|
---|
695 | n = 0;
|
---|
696 | while (1) {
|
---|
697 | cp = fs_type_list[n];
|
---|
698 | if (!cp)
|
---|
699 | break;
|
---|
700 | switch (fs_type_flag[n]) {
|
---|
701 | case FS_TYPE_FLAG_NORMAL:
|
---|
702 | checked_type++;
|
---|
703 | if (strcmp(cp, fs->type) == 0)
|
---|
704 | ret = 1;
|
---|
705 | break;
|
---|
706 | case FS_TYPE_FLAG_NEGOPT:
|
---|
707 | if (opt_in_list(cp, fs->opts))
|
---|
708 | return 0;
|
---|
709 | break;
|
---|
710 | case FS_TYPE_FLAG_OPT:
|
---|
711 | if (!opt_in_list(cp, fs->opts))
|
---|
712 | return 0;
|
---|
713 | break;
|
---|
714 | }
|
---|
715 | n++;
|
---|
716 | }
|
---|
717 | if (checked_type == 0)
|
---|
718 | return 1;
|
---|
719 |
|
---|
720 | return (fs_type_negated ? !ret : ret);
|
---|
721 | }
|
---|
722 |
|
---|
723 | /* Check if we should ignore this filesystem. */
|
---|
724 | static int ignore(struct fs_info *fs)
|
---|
725 | {
|
---|
726 | /*
|
---|
727 | * If the pass number is 0, ignore it.
|
---|
728 | */
|
---|
729 | if (fs->passno == 0)
|
---|
730 | return 1;
|
---|
731 |
|
---|
732 | /*
|
---|
733 | * If a specific fstype is specified, and it doesn't match,
|
---|
734 | * ignore it.
|
---|
735 | */
|
---|
736 | if (!fs_match(fs))
|
---|
737 | return 1;
|
---|
738 |
|
---|
739 | /* Are we ignoring this type? */
|
---|
740 | if (index_in_strings(ignored_types, fs->type) >= 0)
|
---|
741 | return 1;
|
---|
742 |
|
---|
743 | /* We can and want to check this file system type. */
|
---|
744 | return 0;
|
---|
745 | }
|
---|
746 |
|
---|
747 | /* Check all file systems, using the /etc/fstab table. */
|
---|
748 | static int check_all(void)
|
---|
749 | {
|
---|
750 | struct fs_info *fs;
|
---|
751 | int status = EXIT_OK;
|
---|
752 | smallint not_done_yet;
|
---|
753 | smallint pass_done;
|
---|
754 | int passno;
|
---|
755 |
|
---|
756 | if (verbose)
|
---|
757 | puts("Checking all filesystems");
|
---|
758 |
|
---|
759 | /*
|
---|
760 | * Do an initial scan over the filesystem; mark filesystems
|
---|
761 | * which should be ignored as done, and resolve any "auto"
|
---|
762 | * filesystem types (done as a side-effect of calling ignore()).
|
---|
763 | */
|
---|
764 | for (fs = filesys_info; fs; fs = fs->next)
|
---|
765 | if (ignore(fs))
|
---|
766 | fs->flags |= FLAG_DONE;
|
---|
767 |
|
---|
768 | /*
|
---|
769 | * Find and check the root filesystem.
|
---|
770 | */
|
---|
771 | if (!parallel_root) {
|
---|
772 | for (fs = filesys_info; fs; fs = fs->next) {
|
---|
773 | if (LONE_CHAR(fs->mountpt, '/')) {
|
---|
774 | if (!skip_root && !ignore(fs)) {
|
---|
775 | fsck_device(fs /*, 1*/);
|
---|
776 | status |= wait_many(FLAG_WAIT_ALL);
|
---|
777 | if (status > EXIT_NONDESTRUCT)
|
---|
778 | return status;
|
---|
779 | }
|
---|
780 | fs->flags |= FLAG_DONE;
|
---|
781 | break;
|
---|
782 | }
|
---|
783 | }
|
---|
784 | }
|
---|
785 | /*
|
---|
786 | * This is for the bone-headed user who has root
|
---|
787 | * filesystem listed twice.
|
---|
788 | * "Skip root" will skip _all_ root entries.
|
---|
789 | */
|
---|
790 | if (skip_root)
|
---|
791 | for (fs = filesys_info; fs; fs = fs->next)
|
---|
792 | if (LONE_CHAR(fs->mountpt, '/'))
|
---|
793 | fs->flags |= FLAG_DONE;
|
---|
794 |
|
---|
795 | not_done_yet = 1;
|
---|
796 | passno = 1;
|
---|
797 | while (not_done_yet) {
|
---|
798 | not_done_yet = 0;
|
---|
799 | pass_done = 1;
|
---|
800 |
|
---|
801 | for (fs = filesys_info; fs; fs = fs->next) {
|
---|
802 | if (bb_got_signal)
|
---|
803 | break;
|
---|
804 | if (fs->flags & FLAG_DONE)
|
---|
805 | continue;
|
---|
806 | /*
|
---|
807 | * If the filesystem's pass number is higher
|
---|
808 | * than the current pass number, then we didn't
|
---|
809 | * do it yet.
|
---|
810 | */
|
---|
811 | if (fs->passno > passno) {
|
---|
812 | not_done_yet = 1;
|
---|
813 | continue;
|
---|
814 | }
|
---|
815 | /*
|
---|
816 | * If a filesystem on a particular device has
|
---|
817 | * already been spawned, then we need to defer
|
---|
818 | * this to another pass.
|
---|
819 | */
|
---|
820 | if (device_already_active(fs->device)) {
|
---|
821 | pass_done = 0;
|
---|
822 | continue;
|
---|
823 | }
|
---|
824 | /*
|
---|
825 | * Spawn off the fsck process
|
---|
826 | */
|
---|
827 | fsck_device(fs /*, serialize*/);
|
---|
828 | fs->flags |= FLAG_DONE;
|
---|
829 |
|
---|
830 | /*
|
---|
831 | * Only do one filesystem at a time, or if we
|
---|
832 | * have a limit on the number of fsck's extant
|
---|
833 | * at one time, apply that limit.
|
---|
834 | */
|
---|
835 | if (serialize
|
---|
836 | || (max_running && (num_running >= max_running))
|
---|
837 | ) {
|
---|
838 | pass_done = 0;
|
---|
839 | break;
|
---|
840 | }
|
---|
841 | }
|
---|
842 | if (bb_got_signal)
|
---|
843 | break;
|
---|
844 | if (verbose > 1)
|
---|
845 | printf("--waiting-- (pass %d)\n", passno);
|
---|
846 | status |= wait_many(pass_done ? FLAG_WAIT_ALL :
|
---|
847 | FLAG_WAIT_ATLEAST_ONE);
|
---|
848 | if (pass_done) {
|
---|
849 | if (verbose > 1)
|
---|
850 | puts("----------------------------------");
|
---|
851 | passno++;
|
---|
852 | } else
|
---|
853 | not_done_yet = 1;
|
---|
854 | }
|
---|
855 | kill_all_if_got_signal();
|
---|
856 | status |= wait_many(FLAG_WAIT_ATLEAST_ONE);
|
---|
857 | return status;
|
---|
858 | }
|
---|
859 |
|
---|
860 | /*
|
---|
861 | * Deal with the fsck -t argument.
|
---|
862 | * Huh, for mount "-t novfat,nfs" means "neither vfat nor nfs"!
|
---|
863 | * Why here we require "-t novfat,nonfs" ??
|
---|
864 | */
|
---|
865 | static void compile_fs_type(char *fs_type)
|
---|
866 | {
|
---|
867 | char *s;
|
---|
868 | int num = 2;
|
---|
869 | smallint negate;
|
---|
870 |
|
---|
871 | s = fs_type;
|
---|
872 | while ((s = strchr(s, ','))) {
|
---|
873 | num++;
|
---|
874 | s++;
|
---|
875 | }
|
---|
876 |
|
---|
877 | fs_type_list = xzalloc(num * sizeof(fs_type_list[0]));
|
---|
878 | fs_type_flag = xzalloc(num * sizeof(fs_type_flag[0]));
|
---|
879 | fs_type_negated = -1; /* not yet known is it negated or not */
|
---|
880 |
|
---|
881 | num = 0;
|
---|
882 | s = fs_type;
|
---|
883 | while (1) {
|
---|
884 | char *comma;
|
---|
885 |
|
---|
886 | negate = 0;
|
---|
887 | if (s[0] == 'n' && s[1] == 'o') { /* "no.." */
|
---|
888 | s += 2;
|
---|
889 | negate = 1;
|
---|
890 | } else if (s[0] == '!') {
|
---|
891 | s++;
|
---|
892 | negate = 1;
|
---|
893 | }
|
---|
894 |
|
---|
895 | if (strcmp(s, "loop") == 0)
|
---|
896 | /* loop is really short-hand for opts=loop */
|
---|
897 | goto loop_special_case;
|
---|
898 | if (strncmp(s, "opts=", 5) == 0) {
|
---|
899 | s += 5;
|
---|
900 | loop_special_case:
|
---|
901 | fs_type_flag[num] = negate ? FS_TYPE_FLAG_NEGOPT : FS_TYPE_FLAG_OPT;
|
---|
902 | } else {
|
---|
903 | if (fs_type_negated == -1)
|
---|
904 | fs_type_negated = negate;
|
---|
905 | if (fs_type_negated != negate)
|
---|
906 | bb_error_msg_and_die(
|
---|
907 | "either all or none of the filesystem types passed to -t must be prefixed "
|
---|
908 | "with 'no' or '!'");
|
---|
909 | }
|
---|
910 | comma = strchr(s, ',');
|
---|
911 | fs_type_list[num++] = comma ? xstrndup(s, comma-s) : xstrdup(s);
|
---|
912 | if (!comma)
|
---|
913 | break;
|
---|
914 | s = comma + 1;
|
---|
915 | }
|
---|
916 | }
|
---|
917 |
|
---|
918 | static char **new_args(void)
|
---|
919 | {
|
---|
920 | args = xrealloc_vector(args, 2, num_args);
|
---|
921 | return &args[num_args++];
|
---|
922 | }
|
---|
923 |
|
---|
924 | int fsck_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
---|
925 | int fsck_main(int argc UNUSED_PARAM, char **argv)
|
---|
926 | {
|
---|
927 | int i, status;
|
---|
928 | /*int interactive;*/
|
---|
929 | struct fs_info *fs;
|
---|
930 | const char *fstab;
|
---|
931 | char *tmp;
|
---|
932 | char **devices;
|
---|
933 | int num_devices;
|
---|
934 | smallint opts_for_fsck;
|
---|
935 | smallint doall;
|
---|
936 | smallint notitle;
|
---|
937 |
|
---|
938 | /* we want wait() to be interruptible */
|
---|
939 | signal_no_SA_RESTART_empty_mask(SIGINT, record_signo);
|
---|
940 | signal_no_SA_RESTART_empty_mask(SIGTERM, record_signo);
|
---|
941 |
|
---|
942 | setbuf(stdout, NULL);
|
---|
943 |
|
---|
944 | opts_for_fsck = doall = notitle = 0;
|
---|
945 | devices = NULL;
|
---|
946 | num_devices = 0;
|
---|
947 | new_args(); /* args[0] = NULL, will be replaced by fsck.<type> */
|
---|
948 | /* instance_list = NULL; - in bss, so already zeroed */
|
---|
949 |
|
---|
950 | while (*++argv) {
|
---|
951 | int j;
|
---|
952 | int optpos;
|
---|
953 | char *options;
|
---|
954 | char *arg = *argv;
|
---|
955 |
|
---|
956 | /* "/dev/blk" or "/path" or "UUID=xxx" or "LABEL=xxx" */
|
---|
957 | if ((arg[0] == '/' && !opts_for_fsck) || strchr(arg, '=')) {
|
---|
958 | // FIXME: must check that arg is a blkdev, or resolve
|
---|
959 | // "/path", "UUID=xxx" or "LABEL=xxx" into block device name
|
---|
960 | // ("UUID=xxx"/"LABEL=xxx" can probably shifted to fsck.auto duties)
|
---|
961 | devices = xrealloc_vector(devices, 2, num_devices);
|
---|
962 | devices[num_devices++] = arg;
|
---|
963 | continue;
|
---|
964 | }
|
---|
965 |
|
---|
966 | if (arg[0] != '-' || opts_for_fsck) {
|
---|
967 | *new_args() = arg;
|
---|
968 | continue;
|
---|
969 | }
|
---|
970 |
|
---|
971 | if (LONE_CHAR(arg + 1, '-')) { /* "--" ? */
|
---|
972 | opts_for_fsck = 1;
|
---|
973 | continue;
|
---|
974 | }
|
---|
975 |
|
---|
976 | optpos = 0;
|
---|
977 | options = NULL;
|
---|
978 | for (j = 1; arg[j]; j++) {
|
---|
979 | switch (arg[j]) {
|
---|
980 | case 'A':
|
---|
981 | doall = 1;
|
---|
982 | break;
|
---|
983 | #if DO_PROGRESS_INDICATOR
|
---|
984 | case 'C':
|
---|
985 | progress = 1;
|
---|
986 | if (arg[++j]) { /* -Cn */
|
---|
987 | progress_fd = xatoi_positive(&arg[j]);
|
---|
988 | goto next_arg;
|
---|
989 | }
|
---|
990 | /* -C n */
|
---|
991 | if (!*++argv)
|
---|
992 | bb_show_usage();
|
---|
993 | progress_fd = xatoi_positive(*argv);
|
---|
994 | goto next_arg;
|
---|
995 | #endif
|
---|
996 | case 'V':
|
---|
997 | verbose++;
|
---|
998 | break;
|
---|
999 | case 'N':
|
---|
1000 | noexecute = 1;
|
---|
1001 | break;
|
---|
1002 | case 'R':
|
---|
1003 | skip_root = 1;
|
---|
1004 | break;
|
---|
1005 | case 'T':
|
---|
1006 | notitle = 1;
|
---|
1007 | break;
|
---|
1008 | /* case 'M':
|
---|
1009 | like_mount = 1;
|
---|
1010 | break; */
|
---|
1011 | case 'P':
|
---|
1012 | parallel_root = 1;
|
---|
1013 | break;
|
---|
1014 | case 's':
|
---|
1015 | serialize = 1;
|
---|
1016 | break;
|
---|
1017 | case 't':
|
---|
1018 | if (fstype)
|
---|
1019 | bb_show_usage();
|
---|
1020 | if (arg[++j])
|
---|
1021 | tmp = &arg[j];
|
---|
1022 | else if (*++argv)
|
---|
1023 | tmp = *argv;
|
---|
1024 | else
|
---|
1025 | bb_show_usage();
|
---|
1026 | fstype = xstrdup(tmp);
|
---|
1027 | compile_fs_type(fstype);
|
---|
1028 | goto next_arg;
|
---|
1029 | case '?':
|
---|
1030 | bb_show_usage();
|
---|
1031 | break;
|
---|
1032 | default:
|
---|
1033 | optpos++;
|
---|
1034 | /* one extra for '\0' */
|
---|
1035 | options = xrealloc(options, optpos + 2);
|
---|
1036 | options[optpos] = arg[j];
|
---|
1037 | break;
|
---|
1038 | }
|
---|
1039 | }
|
---|
1040 | next_arg:
|
---|
1041 | if (optpos) {
|
---|
1042 | options[0] = '-';
|
---|
1043 | options[optpos + 1] = '\0';
|
---|
1044 | *new_args() = options;
|
---|
1045 | }
|
---|
1046 | }
|
---|
1047 | if (getenv("FSCK_FORCE_ALL_PARALLEL"))
|
---|
1048 | force_all_parallel = 1;
|
---|
1049 | tmp = getenv("FSCK_MAX_INST");
|
---|
1050 | if (tmp)
|
---|
1051 | max_running = xatoi(tmp);
|
---|
1052 | new_args(); /* args[num_args - 2] will be replaced by <device> */
|
---|
1053 | new_args(); /* args[num_args - 1] is the last, NULL element */
|
---|
1054 |
|
---|
1055 | if (!notitle)
|
---|
1056 | puts("fsck (busybox "BB_VER", "BB_BT")");
|
---|
1057 |
|
---|
1058 | /* Even plain "fsck /dev/hda1" needs fstab to get fs type,
|
---|
1059 | * so we are scanning it anyway */
|
---|
1060 | fstab = getenv("FSTAB_FILE");
|
---|
1061 | if (!fstab)
|
---|
1062 | fstab = "/etc/fstab";
|
---|
1063 | load_fs_info(fstab);
|
---|
1064 |
|
---|
1065 | /*interactive = (num_devices == 1) | serialize;*/
|
---|
1066 |
|
---|
1067 | if (num_devices == 0)
|
---|
1068 | /*interactive =*/ serialize = doall = 1;
|
---|
1069 | if (doall)
|
---|
1070 | return check_all();
|
---|
1071 |
|
---|
1072 | status = 0;
|
---|
1073 | for (i = 0; i < num_devices; i++) {
|
---|
1074 | if (bb_got_signal) {
|
---|
1075 | kill_all_if_got_signal();
|
---|
1076 | break;
|
---|
1077 | }
|
---|
1078 |
|
---|
1079 | fs = lookup(devices[i]);
|
---|
1080 | if (!fs)
|
---|
1081 | fs = create_fs_device(devices[i], "", "auto", NULL, -1);
|
---|
1082 | fsck_device(fs /*, interactive */);
|
---|
1083 |
|
---|
1084 | if (serialize
|
---|
1085 | || (max_running && (num_running >= max_running))
|
---|
1086 | ) {
|
---|
1087 | int exit_status = wait_one(0);
|
---|
1088 | if (exit_status >= 0)
|
---|
1089 | status |= exit_status;
|
---|
1090 | if (verbose > 1)
|
---|
1091 | puts("----------------------------------");
|
---|
1092 | }
|
---|
1093 | }
|
---|
1094 | status |= wait_many(FLAG_WAIT_ALL);
|
---|
1095 | return status;
|
---|
1096 | }
|
---|