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#
# $Id: pdbfile.py,v 1.7 1999/08/09 21:59:13 rob Exp $
#
# Copyright 1998-1999 Rob Tillotson <robt@debian.org>
# All Rights Reserved
#
# Permission to use, copy, modify, and distribute this software and
# its documentation for any purpose and without fee or royalty is
# hereby granted, provided that the above copyright notice appear in
# all copies and that both the copyright notice and this permission
# notice appear in supporting documentation or portions thereof,
# including modifications, that you you make.
#
# THE AUTHOR ROB TILLOTSON DISCLAIMS ALL WARRANTIES WITH REGARD TO
# THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
# AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
# SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
# RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
# CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
# CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE!
#
"""PDB file utilities.
This module contains various utility functions which may be useful
to programs -- installers, conduits, etc. -- that deal with PalmOS
databases on the desktop.
"""
__version__ = '$Id: pdbfile.py,v 1.7 1999/08/09 21:59:13 rob Exp $'
__copyright__ = 'Copyright 1998-1999 Rob Tillotson <robt@debian.org>'
import Pyrite
import sys, os, stat, struct
PI_HDR_SIZE = 78
PILOT_TIME_DELTA = 2082844800
dlpDBFlagResource = 0x0001
dlpDBFlagReadOnly = 0x0002
dlpDBFlagAppInfoDirty = 0x0004
dlpDBFlagBackup = 0x0008
dlpDBFlagOpen = 0x8000
# 2.x
dlpDBFlagNewer = 0x0010
dlpDBFlagReset = 0x0020
#
dlpDBMiscFlagExcludeFromSync = 0x80
def flags_to_info(flags):
"""Convert a numeric flag word to a dictionary.
The result is suitable for merging into an info structure
with 'update'.
"""
i = {'flagReset': flags & dlpDBFlagReset,
'flagResource': flags & dlpDBFlagResource,
'flagNewer': flags & dlpDBFlagNewer,
'flagExcludeFromSync': flags & dlpDBMiscFlagExcludeFromSync,
'flagAppInfoDirty': flags & dlpDBFlagAppInfoDirty,
'flagReadOnly': flags & dlpDBFlagReadOnly,
'flagBackup': flags & dlpDBFlagBackup,
'flagOpen': flags & dlpDBFlagOpen,
}
return i
def info_to_flags(i):
"""Extract a numeric flag word from an info structure.
"""
flags = 0
if i.get('flagReset'): flags = flags | dlpDBFlagReset
if i.get('flagResource'): flags = flags | dlpDBFlagResource
if i.get('flagNewer'): flags = flags | dlpDBFlagNewer
if i.get('flagExcludeFromSync'): flags = flags | dlpDBMiscFlagExcludeFromSync
if i.get('flagAppInfoDirty'): flags = flags | dlpDBFlagAppInfoDirty
if i.get('flagBackup'): flags = flags | dlpDBFlagBackup
if i.get('flagOpen'): flags = flags | dlpDBFlagOpen
return flags
def null_terminated(s):
for x in range(0, len(s)):
if s[x] == '\000': return s[:x]
return s
def info(name):
"""Read the header of a PalmOS database file. Although there is
no way to conclusively determine that a file contains a valid
database, this function does a few simple checks and returns None
if the file is invalid. Pilot-link also does this on open, but
since it prints error messages to stderr it is inappropriate to
use it to test a bunch of files in a directory."""
f = open(name, 'rb')
hstr = f.read(PI_HDR_SIZE)
if not hstr or len(hstr) < PI_HDR_SIZE: return None
(name, flags, ver, ctime, mtime, btime, mnum, appinfo, sortinfo,
type, creator, uid, nextrec, numrec) \
= struct.unpack('>32shhLLLlll4s4sllh', hstr)
# "extended format not supported"
if nextrec: return None
# "bad header"
if appinfo < 0 or sortinfo < 0 or numrec < 0: return None
i = {'name': null_terminated(name),
'type': type,
'creator': creator,
'createDate': ctime - PILOT_TIME_DELTA,
'modifyDate': mtime - PILOT_TIME_DELTA,
'backupDate': btime - PILOT_TIME_DELTA,
'modnum': 3,
'version': ver,
'flagReset': flags & dlpDBFlagReset,
'flagResource': flags & dlpDBFlagResource,
'flagNewer': flags & dlpDBFlagNewer,
'flagExcludeFromSync': flags & dlpDBMiscFlagExcludeFromSync,
'flagAppInfoDirty': flags & dlpDBFlagAppInfoDirty,
'flagReadOnly': flags & dlpDBFlagReadOnly,
'flagBackup': flags & dlpDBFlagBackup,
'flagOpen': flags & dlpDBFlagOpen,
'more': 0,
'index': 0
}
return i
def x_info(name):
"""Return the info structure of a PalmOS database file."""
f = Pyrite.openFile(name, typemapper=None)
return f.info
def listdir(path):
"""Scan the specified path for PalmOS database files and return
a list of tuples of (name, info) for each database found.
This function may be expanded in the future to handle zipfiles,
gzipped databases, etc."""
d = os.listdir(path)
l = []
for f in d:
fn = os.path.join(path, f)
# any exception at all means that the file isn't worth reporting
try:
st = os.stat(fn)
if stat.S_ISREG(st[stat.ST_MODE]):
i = info(fn)
if i:
l.append( (f, i) )
except:
pass
return l
def listsubdirs(path):
"""List all subdirectories of the current directory."""
# doesn't really belong here
d = os.listdir(path)
l = []
for f in d:
fn = os.path.join(path, f)
try:
st = os.stat(fn)
if stat.S_ISDIR(st[stat.ST_MODE]): l.append(f)
except:
pass
return l
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