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dumprar.py
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#! /usr/bin/env python
"""Dump archive contents, test extraction."""
import sys
import rarfile as rf
from binascii import crc32, hexlify
from datetime import datetime
rf.REPORT_BAD_HEADER = 1
usage = """
dumprar [switches] [ARC1 ARC2 ...] [@ARCLIST]
switches:
@file read archive names from file
-pPSW set password
-Ccharset set fallback charset
-v increase verbosity
-t attemt to read all files
-x write read files out
-c show archive comment
-h show usage
-- stop switch parsing
""".strip()
os_list = ['DOS', 'OS2', 'WIN', 'UNIX', 'MACOS', 'BEOS']
block_strs = ['MARK', 'MAIN', 'FILE', 'OLD_COMMENT', 'OLD_EXTRA',
'OLD_SUB', 'OLD_RECOVERY', 'OLD_AUTH', 'SUB', 'ENDARC']
def rarType(type):
if type < rf.RAR_BLOCK_MARK or type > rf.RAR_BLOCK_ENDARC:
return "*UNKNOWN*"
return block_strs[type - rf.RAR_BLOCK_MARK]
main_bits = (
(rf.RAR_MAIN_VOLUME, "VOL"),
(rf.RAR_MAIN_COMMENT, "COMMENT"),
(rf.RAR_MAIN_LOCK, "LOCK"),
(rf.RAR_MAIN_SOLID, "SOLID"),
(rf.RAR_MAIN_NEWNUMBERING, "NEWNR"),
(rf.RAR_MAIN_AUTH, "AUTH"),
(rf.RAR_MAIN_RECOVERY, "RECOVERY"),
(rf.RAR_MAIN_PASSWORD, "PASSWORD"),
(rf.RAR_MAIN_FIRSTVOLUME, "FIRSTVOL"),
(rf.RAR_SKIP_IF_UNKNOWN, "SKIP"),
(rf.RAR_LONG_BLOCK, "LONG"),
)
endarc_bits = (
(rf.RAR_ENDARC_NEXT_VOLUME, "NEXTVOL"),
(rf.RAR_ENDARC_DATACRC, "DATACRC"),
(rf.RAR_ENDARC_REVSPACE, "REVSPACE"),
(rf.RAR_ENDARC_VOLNR, "VOLNR"),
(rf.RAR_SKIP_IF_UNKNOWN, "SKIP"),
(rf.RAR_LONG_BLOCK, "LONG"),
)
file_bits = (
(rf.RAR_FILE_SPLIT_BEFORE, "SPLIT_BEFORE"),
(rf.RAR_FILE_SPLIT_AFTER, "SPLIT_AFTER"),
(rf.RAR_FILE_PASSWORD, "PASSWORD"),
(rf.RAR_FILE_COMMENT, "COMMENT"),
(rf.RAR_FILE_SOLID, "SOLID"),
(rf.RAR_FILE_LARGE, "LARGE"),
(rf.RAR_FILE_UNICODE, "UNICODE"),
(rf.RAR_FILE_SALT, "SALT"),
(rf.RAR_FILE_VERSION, "VERSION"),
(rf.RAR_FILE_EXTTIME, "EXTTIME"),
(rf.RAR_FILE_EXTFLAGS, "EXTFLAGS"),
(rf.RAR_SKIP_IF_UNKNOWN, "SKIP"),
(rf.RAR_LONG_BLOCK, "LONG"),
)
generic_bits = (
(rf.RAR_SKIP_IF_UNKNOWN, "SKIP"),
(rf.RAR_LONG_BLOCK, "LONG"),
)
file_parms = ("D64", "D128", "D256", "D512",
"D1024", "D2048", "D4096", "DIR")
def render_flags(flags, bit_list):
res = []
known = 0
for bit in bit_list:
known = known | bit[0]
if flags & bit[0]:
res.append(bit[1])
unknown = flags & ~known
n = 0
while unknown:
if unknown & 1:
res.append("UNK_%04x" % (1 << n))
unknown = unknown >> 1
n += 1
return ",".join(res)
def get_file_flags(flags):
res = render_flags(flags & ~rf.RAR_FILE_DICTMASK, file_bits)
xf = (flags & rf.RAR_FILE_DICTMASK) >> 5
res += "," + file_parms[xf]
return res
def get_main_flags(flags):
return render_flags(flags, main_bits)
def get_endarc_flags(flags):
return render_flags(flags, endarc_bits)
def get_generic_flags(flags):
return render_flags(flags, generic_bits)
def fmt_time(t):
if isinstance(t, datetime):
return t.isoformat(' ')
return "%04d-%02d-%02d %02d:%02d:%02d" % t
def show_item(h):
st = rarType(h.type)
unknown = h.header_size - h.header_base
print("%s: hdrlen=%d datlen=%d hdr_unknown=%d" % (st, h.header_size,
h.add_size, unknown))
if unknown > 0:
dat = h.header_data[h.header_base : ]
print(" unknown: %s" % hexlify(dat))
if h.type in (rf.RAR_BLOCK_FILE, rf.RAR_BLOCK_SUB):
if h.host_os == rf.RAR_OS_UNIX:
s_mode = "0%o" % h.mode
else:
s_mode = "0x%x" % h.mode
print(" flags=0x%04x:%s" % (h.flags, get_file_flags(h.flags)))
if h.host_os >= 0 and h.host_os < len(os_list):
s_os = os_list[h.host_os]
else:
s_os = "?"
print(" os=%d:%s ver=%d mode=%s meth=%c cmp=%d dec=%d vol=%d" % (
h.host_os, s_os,
h.extract_version, s_mode, h.compress_type,
h.compress_size, h.file_size, h.volume))
ucrc = (h.CRC + (1 << 32)) & ((1 << 32) - 1)
print(" crc=0x%08x (%d) time=%s" % (ucrc, h.CRC, fmt_time(h.date_time)))
print(" name=%s" % h.filename)
print(" name=%s" % h.unicode_filename)
if h.mtime:
print(" mtime=%s" % fmt_time(h.mtime))
if h.ctime:
print(" ctime=%s" % fmt_time(h.ctime))
if h.atime:
print(" atime=%s" % fmt_time(h.atime))
if h.arctime:
print(" arctime=%s" % fmt_time(h.arctime))
elif h.type == rf.RAR_BLOCK_MAIN:
print(" flags=0x%04x:%s" % (h.flags, get_main_flags(h.flags)))
elif h.type == rf.RAR_BLOCK_ENDARC:
print(" flags=0x%04x:%s" % (h.flags, get_endarc_flags(h.flags)))
elif h.type == rf.RAR_BLOCK_MARK:
print(" flags=0x%04x:" % (h.flags,))
else:
print(" flags=0x%04x:%s" % (h.flags, get_generic_flags(h.flags)))
if h.comment is not None:
print(" comment=%s" % repr(h.comment))
cf_show_comment = 0
cf_verbose = 0
cf_charset = None
cf_extract = 0
cf_test_read = 0
cf_test_unrar = 0
def test_read_long(r, inf):
f = r.open(inf.filename)
total = 0
while 1:
data = f.read(8192)
if not data:
break
total += len(data)
f.close()
if total != inf.file_size:
print("\n *** %s has corrupt file: %s ***" % (r.rarfile, inf.filename))
print(" *** short read: got=%d, need=%d ***\n" % (total, inf.file_size))
def test_read(r, inf):
if inf.file_size > 2*1024*1024:
test_read_long(r, inf)
else:
dat = r.read(inf.filename)
def test_real(fn, psw):
print("Archive: %s" % fn)
cb = None
if cf_verbose > 1:
cb = show_item
# check if rar
if not rf.is_rarfile(fn):
print(" --- %s is not a RAR file ---" % fn)
return
# open
r = rf.RarFile(fn, charset = cf_charset, info_callback = cb)
# set password
if r.needs_password():
if psw:
r.setpassword(psw)
else:
print(" --- %s requires password ---" % fn)
return
# show comment
if cf_show_comment and r.comment:
for ln in r.comment.split('\n'):
print(" %s" % ln)
elif cf_verbose == 1 and r.comment:
print(" comment=%s" % repr(r.comment))
# process
for n in r.namelist():
inf = r.getinfo(n)
if inf.isdir():
continue
if cf_verbose == 1:
show_item(inf)
if cf_test_read:
test_read(r, inf)
if cf_extract:
r.extractall()
for inf in r.infolist():
r.extract(inf)
if cf_test_unrar:
r.testrar()
def test(fn, psw):
try:
test_real(fn, psw)
except rf.NeedFirstVolume:
print(" --- %s is middle part of multi-vol archive ---" % fn)
except rf.Error:
exc, msg, tb = sys.exc_info()
print("\n *** %s: %s ***\n" % (exc.__name__, msg))
del tb
except IOError:
exc, msg, tb = sys.exc_info()
print("\n *** %s: %s ***\n" % (exc.__name__, msg))
del tb
def main():
global cf_verbose, cf_show_comment, cf_charset
global cf_extract, cf_test_read, cf_test_unrar
# parse args
args = []
psw = None
noswitch = False
for a in sys.argv[1:]:
if noswitch:
args.append(a)
elif a[0] == "@":
for ln in open(a[1:], 'r'):
fn = ln[:-1]
args.append(fn)
elif a[0] != '-':
args.append(a)
elif a[1] == 'p':
psw = a[2:]
elif a == '--':
noswitch = True
elif a == '-h':
print(usage)
return
elif a == '-v':
cf_verbose += 1
elif a == '-c':
cf_show_comment = 1
elif a == '-x':
cf_extract = 1
elif a == '-t':
cf_test_read = 1
elif a == '-T':
cf_test_unrar = 1
elif a[1] == 'C':
cf_charset = a[2:]
else:
raise Exception("unknown switch: "+a)
if not args:
print(usage)
for fn in args:
test(fn, psw)
if __name__ == '__main__':
try:
main()
except KeyboardInterrupt:
pass