def cloneMeta(logger, originFile, destinationFile):
'''
Copies all permissions, ownership and security context (secon) data
from originFile to destinationFile. This function does not work on Mac OS X
systems.
@param originFile: full file path to copy metadata from
@param destinationFile: full file path to copy metadata to
@author bemalmbe
'''
# note that the stat tool is not always installed by default on all systems
# - namely: solaris and derivations thereof
env = Environment()
if env.getosfamily() == 'darwin':
return
try:
# clone permissions; doesn't work on mac os x
if env.getosfamily() == 'freebsd':
(stdout, stderr) = Popen(["stat -f %Op " + originFile], shell=True,
stdout=PIPE).communicate()
else:
(stdout, stderr) = Popen(["stat -c %a " + originFile], shell=True,
stdout=PIPE).communicate()
if stdout and isinstance(stdout, str):
if not re.match("^[0-9]*$", stdout):
logger.log(LogPriority.DEBUG,
'Improperly formatted permissions string returned')
formattedperms = stdout.strip()
# the freebsd version of the stat command can only return a string
# which contains the file type code prepended to the octal
# permissions string we must therefor strip the preceeding file
# type code in order to perform a chmod with it
if len(formattedperms) > 3:
while len(formattedperms) > 3:
formattedperms = formattedperms[1:]
os.system('chmod ' + formattedperms + ' ' + destinationFile)
# clone ownership
(stdout, stderr) = Popen(["stat -c %U:%G " + originFile],
shell=True, stdout=PIPE).communicate()
formattedownership = stdout.strip()
os.system('chown ' + formattedownership + ' ' + destinationFile)
# clone secon; doesn't work on mac os x
if env.getosfamily() != 'darwin':
os.system('chcon --reference=' + originFile + ' ' + \
destinationFile)
else:
logger.log(LogPriority.DEBUG, 'stat command failed to get ' + \
'output. Is the stat command available on this ' + \
'system type?')
return
except (OSError):
raise
except Exception:
raise
