163 lines
4.6 KiB
Python
163 lines
4.6 KiB
Python
#
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# Gramps - a GTK+/GNOME based genealogy program
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#
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# Copyright (C) 2000-2005 Donald N. Allingham
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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#
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# $Id$
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import gzip
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import cStringIO
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_BLKSIZE=512
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nul = '\0'
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#------------------------------------------------------------------------
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#
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# TarFile
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#
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#------------------------------------------------------------------------
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class TarFile:
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def __init__(self,name):
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self.name = name
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self.f = gzip.open(name,"wb")
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self.pos = 0
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def add_file(self,filename,mtime,iobuf):
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iobuf.seek(0,2)
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length = iobuf.tell()
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iobuf.seek(0)
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buf = filename
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buf = buf + '\0'*(100-len(filename))
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buf = buf + "0100664" + nul
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buf = buf + "0000764" + nul
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buf = buf + "0000764" + nul
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buf = buf + "%011o" % length + nul
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buf = buf + "%011o" % mtime + nul
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buf = buf + "%s"
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buf = buf + "0" + '\0'*100 + 'ustar \0'
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buf = buf + '\0'*32
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buf = buf + '\0'*32
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buf = buf + '\0'*183
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chksum = 0
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blank = " "
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temp = buf % (blank)
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for c in temp:
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chksum = chksum + ord(c)
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vsum = "%06o " % chksum
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vsum = vsum + nul
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buf = buf % vsum
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self.pos = self.pos + len(buf)
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self.f.write(buf)
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buf = iobuf.read(length)
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self.f.write(buf)
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self.pos = self.pos + length
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rem = _BLKSIZE - (self.pos % _BLKSIZE)
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if rem != 0:
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self.f.write('\0' * rem)
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self.pos = self.pos + rem
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def close(self):
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rem = (_BLKSIZE*20) - (self.pos % (_BLKSIZE*20))
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if rem != 0:
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self.f.write('\0' * rem)
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self.f.close()
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#------------------------------------------------------------------------
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#
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# ReadTarFile
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#
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#------------------------------------------------------------------------
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class ReadTarFile:
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def __init__(self,name,wd="/tmp"):
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self.name = name
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self.wd = wd
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self.f = gzip.open(name,"rb")
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self.pos = 0
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def extract_files(self):
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data = {}
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while 1:
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buf = self.f.read(100)
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if buf == '':
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return
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index = 0
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for b in buf:
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if b != nul:
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index = index + 1
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else:
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if index == 0:
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return data
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continue
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filename = buf[0:index]
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if filename == None:
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return data
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self.f.read(24) # modes
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l = self.f.read(12).replace(chr(0),' ')
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length = int(l,8)
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self.f.read(12)
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self.f.read(6)
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self.f.read(111)
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self.f.read(64)
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self.f.read(183)
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foo = cStringIO.StringIO()
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data[filename] = foo
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foo.write(self.f.read(length))
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foo.reset()
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self.f.read(_BLKSIZE-(length%_BLKSIZE))
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return data
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def extract(self):
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while 1:
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buf = self.f.read(100)
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if buf == '':
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return
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index = 0
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for b in buf:
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if b != nul:
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index = index + 1
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else:
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if index == 0:
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return
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continue
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filename = buf[0:index]
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self.f.read(24) # modes
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l = self.f.read(12)
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length_string = "";
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for char in l:
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if ord(char) != 0:
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length_string = length_string + char
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length = int(length_string,8)
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self.f.read(12)
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self.f.read(6)
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self.f.read(111)
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self.f.read(64)
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self.f.read(183)
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foo = open("%s/%s" % (self.wd,filename),"wb")
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foo.write(self.f.read(length))
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foo.close()
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self.f.read(_BLKSIZE-(length%_BLKSIZE))
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def close(self):
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self.f.close()
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