6069245350
Distinct copyrights were left as I do not wish to track down commit history to ensure it properly documents the copyright holders. Also left non-GPLv2 licenses and left bs_copy untouched as a mirror from OBS. Already have a mix of with and without headers and even OBS does not place on majority of files. If SUSE lawyers have an issue it will come up in legal review for Factory.
83 lines
2.2 KiB
Python
83 lines
2.2 KiB
Python
#!/usr/bin/python
|
|
|
|
import struct
|
|
|
|
class Cpio(object):
|
|
def __init__(self, buf):
|
|
self.buf = buf
|
|
self.off = 0
|
|
|
|
def __iter__(self):
|
|
return self
|
|
|
|
def next(self):
|
|
f = CpioFile(self.off, self.buf)
|
|
if f.fin():
|
|
raise StopIteration
|
|
self.off = self.off+f.length()
|
|
return f
|
|
|
|
class CpioFile(object):
|
|
def __init__(self, off, buf):
|
|
self.off = off
|
|
self.buf = buf
|
|
|
|
if off&3:
|
|
raise Exception("invalid offset %d"% off)
|
|
|
|
fmt = "6s8s8s8s8s8s8s8s8s8s8s8s8s8s"
|
|
off = self.off + struct.calcsize(fmt)
|
|
|
|
fields = struct.unpack(fmt, buf[self.off:off])
|
|
|
|
if fields[0] != "070701":
|
|
raise Exception("invalid cpio header %s"%self.c_magic)
|
|
|
|
names = ("c_ino", "c_mode", "c_uid", "c_gid",
|
|
"c_nlink", "c_mtime", "c_filesize",
|
|
"c_devmajor", "c_devminor", "c_rdevmajor",
|
|
"c_rdevminor", "c_namesize", "c_check")
|
|
for (n, v) in zip(names, fields[1:]):
|
|
setattr(self, n, int(v, 16))
|
|
|
|
nlen = self.c_namesize - 1
|
|
self.name = struct.unpack('%ds'%nlen, buf[off:off+nlen])[0]
|
|
off = off + nlen + 1
|
|
if off&3:
|
|
off = off + 4-(off&3) # padding
|
|
self.payloadstart = off
|
|
|
|
def fin(self):
|
|
return self.name == 'TRAILER!!!'
|
|
|
|
def __str__(self):
|
|
return "[%s %d]"%(self.name, self.c_filesize)
|
|
|
|
def header(self):
|
|
return self.buf[self.payloadstart:self.payloadstart+self.c_filesize]
|
|
|
|
def length(self):
|
|
l = self.payloadstart-self.off + self.c_filesize
|
|
if self.c_filesize&3:
|
|
l = l + 4-(self.c_filesize&3)
|
|
return l
|
|
|
|
if __name__ == '__main__':
|
|
from optparse import OptionParser
|
|
|
|
parser = OptionParser()
|
|
parser.add_option("--debug", action="store_true", help="debug output")
|
|
parser.add_option("--verbose", action="store_true", help="verbose")
|
|
|
|
(options, args) = parser.parse_args()
|
|
|
|
for fn in args:
|
|
fh = open(fn, 'rb')
|
|
cpio = Cpio(fh.read())
|
|
for i in cpio:
|
|
print(i)
|
|
ofh = open(i.name, 'wb')
|
|
ofh.write(i.header())
|
|
ofh.close()
|
|
|