1 | #!/usr/bin/env python
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2 | # -*- coding: utf-8 -*-
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3 |
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4 | # $URL: baculafs/trunk/baculafs.py $
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5 | # $Id: baculafs.py 783 2009-08-25 15:23:49Z joergs $
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6 |
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7 | import logging
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8 | import fuse
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9 | import stat
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10 | import errno
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11 | import os
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12 | import pexpect
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13 | import sys
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14 |
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15 | fuse.fuse_python_api = (0, 2)
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16 |
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17 | ###### bconsole
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18 | ################
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19 |
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20 | BACULA_FS_VERSION = "$Rev: 783 $"
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21 |
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22 | LOG_FILENAME = '/tmp/baculafs.log'
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23 | #LOG_BCONSOLE = '/tmp/bconsole.log'
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24 | LOG_BCONSOLE_DUMP = '/tmp/bconsole.out'
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25 |
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26 |
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27 | #BACULA_CMD = 'strace -f -o /tmp/bconsole.strace /usr/sbin/bconsole -n'
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28 | BACULA_CMD = '/usr/sbin/bconsole -n'
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29 | # .clients
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30 | # 5: ting-fd
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31 | BACULA_CLIENT='5'
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32 |
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33 | BCONSOLE_CMD_PROMPT='\*'
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34 | BCONSOLE_SELECT_PROMPT='Select item:.*'
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35 | BCONSOLE_RESTORE_PROMPT='\$ '
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36 |
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37 |
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38 | class Bconsole:
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39 |
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40 | def __init__(self, client=BACULA_CLIENT):
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41 | #logging.debug('BC init')
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42 | self.bconsole = pexpect.spawn( BACULA_CMD, logfile=file(LOG_BCONSOLE_DUMP, 'w'), timeout=10 )
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43 | self.bconsole.setecho( False )
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44 | self.bconsole.expect( BCONSOLE_CMD_PROMPT )
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45 | self.bconsole.sendline( 'restore' )
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46 | #self.bconsole.expect( BCONSOLE_SELECT_PROMPT )
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47 | self.bconsole.sendline( "5" )
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48 | #self.bconsole.expect( BCONSOLE_SELECT_PROMPT )
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49 | self.bconsole.sendline( BACULA_CLIENT )
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50 | self.bconsole.expect( BCONSOLE_RESTORE_PROMPT )
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51 | #logging.debug( "BC alive: " + str(self.bconsole.isalive()) )
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52 | #logging.debug('BC init done')
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53 |
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54 | def cd(self, path):
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55 | path = path + "/"
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56 | logging.debug( "(" + path + ")" )
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57 |
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58 | self.bconsole.sendline( 'cd ' + path )
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59 | #self.bconsole.expect( BCONSOLE_RESTORE_PROMPT, timeout=10 )
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60 | #self.bconsole.sendline( 'pwd' )
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61 |
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62 | index = self.bconsole.expect( ["cwd is: " + path + "[/]?", BCONSOLE_RESTORE_PROMPT, pexpect.EOF, pexpect.TIMEOUT ] )
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63 | logging.debug( "cd result: " + str(index) )
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64 |
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65 | if index == 0:
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66 | # path ok, now wait for prompt
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67 | self.bconsole.expect( BCONSOLE_RESTORE_PROMPT )
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68 | return True
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69 | elif index == 1:
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70 | #print "wrong path"
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71 | return False
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72 | elif index == 2:
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73 | logging.error( "EOF bconsole" )
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74 | #raise?
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75 | return False
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76 | elif index == 3:
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77 | logging.error( "TIMEOUT bconsole" )
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78 | return False
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79 |
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80 | def ls(self, path):
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81 | logging.debug( "(" + path + ")" )
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82 |
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83 | if self.cd( path ):
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84 | self.bconsole.sendline( 'ls' )
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85 | self.bconsole.expect( BCONSOLE_RESTORE_PROMPT )
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86 | lines = self.bconsole.before.splitlines()
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87 | #logging.debug( str(lines) )
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88 | return lines
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89 | else:
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90 | return
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91 |
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92 | ###############
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93 |
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94 | class BaculaFS(fuse.Fuse):
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95 |
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96 | TYPE_NONE = 0
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97 | TYPE_FILE = 1
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98 | TYPE_DIR = 2
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99 |
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100 | files = { '': {'type': TYPE_DIR} }
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101 |
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102 | def __init__(self, *args, **kw):
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103 | logging.debug('init')
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104 | #self.console = Bconsole()
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105 | fuse.Fuse.__init__(self, *args, **kw)
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106 | #logging.debug('init finished')
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107 |
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108 |
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109 | def _getattr(self,path):
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110 | # TODO: may cause problems with filenames that ends with "/"
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111 | path = path.rstrip( '/' )
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112 | logging.debug( '"' + path + '"' )
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113 |
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114 | if (path in self.files):
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115 | #logging.debug( "(" + path + ")=" + str(self.files[path]) )
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116 | return self.files[path]
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117 |
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118 | if Bconsole().cd(path):
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119 | # don't define files, because these have not been checked
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120 | self.files[path] = { 'type': self.TYPE_DIR, 'dirs': [ ".", ".." ] }
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121 |
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122 | return self.files[path]
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123 |
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124 |
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125 |
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126 |
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127 | def _getdir(self, path):
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128 |
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129 | # TODO: may cause problems with filenames that ends with "/"
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130 | path = path.rstrip( '/' )
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131 | logging.debug( '"' + path + '"' )
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132 |
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133 | if (path in self.files):
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134 | #logging.debug( "(" + path + ")=" + str(self.files[path]) )
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135 | if self.files[path]['type'] == self.TYPE_NONE:
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136 | logging.info( '"' + path + '" does not exist (cached)' )
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137 | return self.files[path]
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138 | elif self.files[path]['type'] == self.TYPE_FILE:
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139 | logging.info( '"' + path + '"=file (cached)' )
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140 | return self.files[path]
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141 | elif ((self.files[path]['type'] == self.TYPE_DIR) and ('files' in self.files[path])):
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142 | logging.info( '"' + path + '"=dir (cached)' )
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143 | return self.files[path]
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144 |
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145 | try:
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146 | files = Bconsole().ls(path)
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147 | logging.debug( " files: " + str( files ) )
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148 |
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149 | # setting initial empty directory. Add entires later in this function
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150 | self.files[path] = { 'type': self.TYPE_DIR, 'dirs': [ ".", ".." ], 'files': [] }
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151 | for i in files:
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152 | if i.endswith('/'):
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153 | # we expect a directory
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154 | # TODO: error with filesnames, that ends with '/'
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155 | i = i.rstrip( '/' )
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156 | self.files[path]['dirs'].append(i)
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157 | if not (i in self.files):
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158 | self.files[path + "/" + i] = { 'type': self.TYPE_DIR }
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159 | else:
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160 | self.files[path]['files'].append(i)
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161 | self.files[path + "/" + i] = { 'type': self.TYPE_FILE }
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162 |
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163 | except Exception as e:
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164 | logging.exception(e)
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165 | logging.error( "no access to path " + path )
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166 | self.files[path] = { 'type': TYPE_NONE }
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167 | logging.debug( '"' + path + '"=' + str( self.files[path] ) )
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168 | return self.files[path]
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169 |
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170 |
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171 |
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172 | # TODO: only works after readdir for the directory (eg. ls)
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173 | def getattr(self, path):
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174 |
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175 | # TODO: may cause problems with filenames that ends with "/"
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176 | path = path.rstrip( '/' )
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177 | logging.debug( '"' + path + '"' )
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178 |
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179 | st = fuse.Stat()
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180 |
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181 | if not (path in self.files):
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182 | self._getattr(path)
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183 |
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184 | if not (path in self.files):
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185 | return -errno.ENOENT
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186 |
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187 | file = self.files[path]
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188 |
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189 | if file['type'] == self.TYPE_FILE:
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190 | st.st_mode = stat.S_IFREG | 0444
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191 | st.st_nlink = 1
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192 | st.st_size = 0
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193 | return st
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194 | elif file['type'] == self.TYPE_DIR:
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195 | st.st_mode = stat.S_IFDIR | 0755
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196 | if 'dirs' in file:
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197 | st.st_nlink = len(file['dirs'])
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198 | else:
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199 | st.st_nlink = 2
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200 | return st
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201 |
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202 | # TODO: check for existens
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203 | return -errno.ENOENT
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204 |
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205 |
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206 |
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207 |
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208 | def readdir(self, path, offset):
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209 | logging.debug( '"' + path + '", offset=' + str(offset) + ')' )
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210 |
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211 | dir = self._getdir( path )
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212 |
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213 | #logging.debug( " readdir: type: " + str( dir['type'] ) )
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214 | #logging.debug( " readdir: dirs: " + str( dir['dirs'] ) )
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215 | #logging.debug( " readdir: file: " + str( dir['files'] ) )
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216 |
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217 | if dir['type'] != self.TYPE_DIR:
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218 | return -errno.ENOENT
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219 | else:
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220 | return [fuse.Direntry(f) for f in dir['files'] + dir['dirs']]
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221 |
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222 | #def open( self, path, flags ):
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223 | #logging.debug( "open " + path )
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224 | #return -errno.ENOENT
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225 |
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226 | #def read( self, path, length, offset):
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227 | #logging.debug( "read " + path )
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228 | #return -errno.ENOENT
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229 |
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230 | if __name__ == "__main__":
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231 | # initialize logging
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232 | logging.basicConfig(filename=LOG_FILENAME,level=logging.DEBUG,format="%(asctime)s %(process)5d(%(threadName)s) %(levelname)-7s %(funcName)s( %(message)s )")
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233 |
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234 |
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235 | usage = """
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236 | Bacula filesystem: displays files from Bacula backups as a (userspace) filesystem.
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237 | Internaly, it uses Baculas bconsole.
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238 |
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239 | """ + fuse.Fuse.fusage
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240 |
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241 |
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242 | fs = BaculaFS(
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243 | version="%prog: " + BACULA_FS_VERSION,
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244 | usage=usage,
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245 | # required to let "-s" set single-threaded execution
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246 | dash_s_do='setsingle'
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247 | )
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248 |
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249 | #server.parser.add_option(mountopt="root", metavar="PATH", default='/',help="mirror filesystem from under PATH [default: %default]")
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250 | #server.parse(values=server, errex=1)
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251 | fs.parse()
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252 |
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253 | fs.main()
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