/usr/share/pyshared/checkbox/lib/safe.py is in checkbox 0.13.7.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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# This file is part of Checkbox.
#
# Copyright 2008 Canonical Ltd.
#
# Checkbox is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Checkbox is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Checkbox. If not, see <http://www.gnu.org/licenses/>.
#
import os
import posixpath
import shutil
from stat import ST_MODE, S_IMODE, S_ISFIFO
def safe_change_mode(path, mode):
if not posixpath.exists(path):
raise Exception, "Path does not exist: %s" % path
old_mode = os.stat(path)[ST_MODE]
if mode != S_IMODE(old_mode):
os.chmod(path, mode)
def safe_make_directory(path, mode=0755):
if posixpath.exists(path):
if not posixpath.isdir(path):
raise Exception, "Path is not a directory: %s" % path
else:
os.makedirs(path, mode)
def safe_make_fifo(path, mode=0666):
if posixpath.exists(path):
mode = os.stat(path)[ST_MODE]
if not S_ISFIFO(mode):
raise Exception, "Path is not a FIFO: %s" % path
else:
os.mkfifo(path, mode)
def safe_remove_directory(path):
if posixpath.exists(path):
if not posixpath.isdir(path):
raise Exception, "Path is not a directory: %s" % path
shutil.rmtree(path)
def safe_remove_file(path):
if posixpath.exists(path):
if not posixpath.isfile(path):
raise Exception, "Path is not a file: %s" % path
os.remove(path)
def safe_rename(old, new):
if old != new:
if not posixpath.exists(old):
raise Exception, "Old path does not exist: %s" % old
if posixpath.exists(new):
raise Exception, "New path exists already: %s" % new
os.rename(old, new)
def safe_md5sum():
try:
import hashlib
digest = hashlib.md5()
except ImportError:
# for Python << 2.5
import md5
digest = md5.new()
return digest
def safe_md5sum_file(name):
md5sum = None
if posixpath.exists(name):
file = open(name)
digest = safe_md5sum()
while 1:
buf = file.read(4096)
if buf == "":
break
digest.update(buf)
file.close()
md5sum = digest.hexdigest()
return md5sum
def safe_close(file, safe=True):
if safe:
file.flush()
os.fsync(file.fileno())
file.close()
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