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## func
##
## filetracker
## maintains a manifest of files of which to keep track
## provides file meta-data (and optionally full data) to func-inventory
##
## (C) Vito Laurenza <vitolaurenza@gmail.com>
## + Michael DeHaan <mdehaan@redhat.com>
##
## This software may be freely redistributed under the terms of the GNU
## general public license.
##
## You should have received a copy of the GNU General Public License
## along with this program; if not, write to the Free Software
## Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
##
# func modules
import func_module
# other modules
from stat import *
import glob
import os
import md5
# defaults
CONFIG_FILE='/etc/func/modules/filetracker.conf'
class FileTracker(func_module.FuncModule):
version = "0.0.1"
api_version = "0.0.1"
description = "Maintains a manifest of files to keep track of."
def __load(self):
"""
Parse file and return data structure.
"""
filehash = {}
if os.path.exists(CONFIG_FILE):
config = open(CONFIG_FILE, "r")
data = config.read()
lines = data.split("\n")
for line in lines:
tokens = line.split(None)
if len(tokens) < 2:
continue
scan_mode = tokens[0]
path = " ".join(tokens[1:])
if str(scan_mode).lower() == "0":
scan_mode = 0
else:
scan_mode = 1
filehash[path] = scan_mode
return filehash
#==========================================================
def __save(self, filehash):
"""
Write data structure to file.
"""
config = open(CONFIG_FILE, "w+")
for (path, scan_mode) in filehash.iteritems():
config.write("%s %s\n" % (scan_mode, path))
config.close()
#==========================================================
def track(self, file_name, full_scan=0):
"""
Adds files to keep track of.
full_scan implies tracking the full contents of the file, defaults to off
"""
filehash = self.__load()
filehash[file_name] = full_scan
self.__save(filehash)
return 1
#==========================================================
def untrack(self, file_name):
"""
Stop keeping track of a file.
This routine is tolerant of most errors since we're forgetting about the file anyway.
"""
filehash = self.__load()
if file_name in filehash.keys():
del filehash[file_name]
self.__save(filehash)
return 1
#==========================================================
def inventory(self, flatten=1, checksum_enabled=1):
"""
Returns information on all tracked files
By default, 'flatten' is passed in as True, which makes printouts very clean in diffs
for use by func-inventory. If you are writting another software application, using flatten=False will
prevent the need to parse the returns.
"""
# XMLRPC feeds us strings from the CLI when it shouldn't
flatten = int(flatten)
checksum_enabled = int(checksum_enabled)
filehash = self.__load()
# we'll either return a very flat string (for clean diffs)
# or a data structure
if flatten:
results = ""
else:
results = []
for (file_name, scan_type) in filehash.iteritems():
if not os.path.exists(file_name):
if flatten:
results = results + "%s: does not exist\n" % file_name
else:
results.append("%s: does not exist\n" % file_name)
continue
this_result = []
# ----- always process metadata
filestat = os.stat(file_name)
mode = filestat[ST_MODE]
mtime = filestat[ST_MTIME]
uid = filestat[ST_UID]
gid = filestat[ST_GID]
if not os.path.isdir(file_name) and checksum_enabled:
sum_handle = open(file_name)
hash = self.__sumfile(sum_handle)
sum_handle.close()
else:
hash = "N/A"
# ------ what we return depends on flatten
if flatten:
this_result = "%s: mode=%s mtime=%s uid=%s gid=%s md5sum=%s\n" % (file_name,mode,mtime,uid,gid,hash)
else:
this_result = [file_name,mode,mtime,uid,gid,hash]
# ------ add on file data only if requested
if scan_type != 0 and os.path.isfile(file_name):
tracked_file = open(file_name)
data = tracked_file.read()
if flatten:
this_result = this_result + "*** DATA ***\n" + data + "\n*** END DATA ***\n\n"
else:
this_result.append(data)
tracked_file.close()
if os.path.isdir(file_name):
if not file_name.endswith("/"):
file_name = file_name + "/"
files = glob.glob(file_name + "*")
if flatten:
this_result = this_result + "*** FILES ***\n" + "\n".join(files) + "\n*** END FILES ***\n\n"
else:
this_result.append({"files" : files})
if flatten:
results = results + "\n" + this_result
else:
results.append(this_result)
return results
#==========================================================
def __sumfile(self, fobj):
"""
Returns an md5 hash for an object with read() method.
credit: http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/266486
"""
m = md5.new()
while True:
d = fobj.read(8096)
if not d:
break
m.update(d)
return m.hexdigest()
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