/usr/share/pyshared/minidinstall/DpkgControl.py is in mini-dinstall 0.6.29ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 | # DpkgControl.py
#
# This module implements control file parsing.
#
# DpkgParagraph is a low-level class, that reads/parses a single paragraph
# from a file object.
#
# DpkgControl uses DpkgParagraph in a loop, pulling out the value of a
# defined key(package), and using that as a key in it's internal
# dictionary.
#
# DpkgSourceControl grabs the first paragraph from the file object, stores
# it in object.source, then passes control to DpkgControl.load, to parse
# the rest of the file.
#
# To test this, pass it a filetype char, a filename, then, optionally,
# the key to a paragraph to display, and if a fourth arg is given, only
# show that field.
#
# Copyright 2001 Adam Heath <doogie@debian.org>
#
# This file is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
import re, string
from DpkgDatalist import *
from minidinstall.SignedFile import *
from types import ListType
class DpkgParagraph(DpkgOrderedDatalist):
caseSensitive = 0
trueFieldCasing = {}
def setCaseSensitive( self, value ): self.caseSensitive = value
def load( self, f ):
"Paragraph data from a file object."
key = None
value = None
while 1:
line = f.readline()
if not line:
return
# skip blank lines until we reach a paragraph
if line == '\n':
if not self:
continue
else:
return
line = line[ :-1 ]
if line[ 0 ] != ' ':
key, value = string.split( line, ":", 1 )
if value: value = value[ 1: ]
if not self.caseSensitive:
newkey = string.lower( key )
if not self.trueFieldCasing.has_key( key ):
self.trueFieldCasing[ newkey ] = key
key = newkey
else:
if isinstance( value, ListType ):
value.append( line[ 1: ] )
else:
value = [ value, line[ 1: ] ]
self[ key ] = value
def _storeField( self, f, value, lead = " " ):
if isinstance( value, ListType ):
value = string.join( map( lambda v, lead = lead: v and ( lead + v ) or v, value ), "\n" )
else:
if value: value = lead + value
f.write( "%s\n" % ( value ) )
def _store( self, f ):
"Write our paragraph data to a file object"
for key in self.keys():
value = self[ key ]
if self.trueFieldCasing.has_key( key ):
key = self.trueFieldCasing[ key ]
f.write( "%s:" % key )
self._storeField( f, value )
class DpkgControl(DpkgOrderedDatalist):
key = "package"
caseSensitive = 0
def setkey( self, key ): self.key = key
def setCaseSensitive( self, value ): self.caseSensitive = value
def _load_one( self, f ):
p = DpkgParagraph( None )
p.setCaseSensitive( self.caseSensitive )
p.load( f )
return p
def load( self, f ):
while 1:
p = self._load_one( f )
if not p: break
self[ p[ self.key ] ] = p
def _store( self, f ):
"Write our control data to a file object"
for key in self.keys():
self[ key ]._store( f )
f.write( "\n" )
class DpkgSourceControl( DpkgControl ):
source = None
def load( self, f ):
f = SignedFile(f)
self.source = self._load_one( f )
DpkgControl.load( self, f )
def __repr__( self ):
return self.source.__repr__() + "\n" + DpkgControl.__repr__( self )
def _store( self, f ):
"Write our control data to a file object"
self.source._store( f )
f.write( "\n" )
DpkgControl._store( self, f )
if __name__ == "__main__":
import sys
types = { 'p' : DpkgParagraph, 'c' : DpkgControl, 's' : DpkgSourceControl }
type = sys.argv[ 1 ]
if not types.has_key( type ):
print "Unknown type `%s'!" % type
sys.exit( 1 )
file = open( sys.argv[ 2 ], "r" )
data = types[ type ]()
data.load( file )
if len( sys.argv ) > 3:
para = data[ sys.argv[ 3 ] ]
if len( sys.argv ) > 4:
para._storeField( sys.stdout, para[ sys.argv[ 4 ] ], "" )
else:
para._store( sys.stdout )
else:
data._store( sys.stdout )
# vim:ts=4:sw=4:et:
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