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#!/usr/bin/env python
"""
Synopsis: %(prog)s [-h|-g|-b|-r|-a] dbfile [ picklefile ]
Convert the database file given on the command line to a pickle
representation. The optional flags indicate the type of the database:
-a - open using dbm (any supported format)
-b - open as bsddb btree file
-d - open as dbm file
-g - open as gdbm file
-h - open as bsddb hash file
-r - open as bsddb recno file
The default is hash. If a pickle file is named it is opened for write
access (deleting any existing data). If no pickle file is named, the pickle
output is written to standard output.
"""
import getopt
try:
import bsddb
except ImportError:
bsddb = None
try:
import dbm.ndbm as dbm
except ImportError:
dbm = None
try:
import dbm.gnu as gdbm
except ImportError:
gdbm = None
try:
import dbm as anydbm
except ImportError:
anydbm = None
import sys
try:
import cPickle as pickle
except ImportError:
import pickle
prog = sys.argv[0]
def usage():
sys.stderr.write(__doc__ % globals())
def main(args):
try:
opts, args = getopt.getopt(args, "hbrdag",
["hash", "btree", "recno", "dbm",
"gdbm", "anydbm"])
except getopt.error:
usage()
return 1
if len(args) == 0 or len(args) > 2:
usage()
return 1
elif len(args) == 1:
dbfile = args[0]
pfile = sys.stdout
else:
dbfile = args[0]
try:
pfile = open(args[1], 'wb')
except IOError:
sys.stderr.write("Unable to open %s\n" % args[1])
return 1
dbopen = None
for opt, arg in opts:
if opt in ("-h", "--hash"):
try:
dbopen = bsddb.hashopen
except AttributeError:
sys.stderr.write("bsddb module unavailable.\n")
return 1
elif opt in ("-b", "--btree"):
try:
dbopen = bsddb.btopen
except AttributeError:
sys.stderr.write("bsddb module unavailable.\n")
return 1
elif opt in ("-r", "--recno"):
try:
dbopen = bsddb.rnopen
except AttributeError:
sys.stderr.write("bsddb module unavailable.\n")
return 1
elif opt in ("-a", "--anydbm"):
try:
dbopen = anydbm.open
except AttributeError:
sys.stderr.write("dbm module unavailable.\n")
return 1
elif opt in ("-g", "--gdbm"):
try:
dbopen = gdbm.open
except AttributeError:
sys.stderr.write("dbm.gnu module unavailable.\n")
return 1
elif opt in ("-d", "--dbm"):
try:
dbopen = dbm.open
except AttributeError:
sys.stderr.write("dbm.ndbm module unavailable.\n")
return 1
if dbopen is None:
if bsddb is None:
sys.stderr.write("bsddb module unavailable - ")
sys.stderr.write("must specify dbtype.\n")
return 1
else:
dbopen = bsddb.hashopen
try:
db = dbopen(dbfile, 'r')
except bsddb.error:
sys.stderr.write("Unable to open %s. " % dbfile)
sys.stderr.write("Check for format or version mismatch.\n")
return 1
for k in db.keys():
pickle.dump((k, db[k]), pfile, 1==1)
db.close()
pfile.close()
return 0
if __name__ == "__main__":
sys.exit(main(sys.argv[1:]))
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