docker-offlineimap/offlineimap/utils/distro.py

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# Copyright 2014-2006 Eygene A. Ryabinkin & contributors.
#
# Module that supports distribution-specific functions.
import platform
import os
# Each dictionary value is either string or some iterable.
#
# For the former we will just return the value, for an iterable
# we will walk through the values and will return the first
# one that corresponds to the existing file.
__DEF_OS_LOCATIONS = {
'freebsd': '/usr/local/share/certs/ca-root-nss.crt',
'openbsd': '/etc/ssl/cert.pem',
'dragonfly': '/etc/ssl/cert.pem',
'darwin': [
# MacPorts, port curl-ca-bundle
'/opt/local/share/curl/curl-ca-bundle.crt',
],
'linux-ubuntu': '/etc/ssl/certs/ca-certificates.crt',
'linux-debian': '/etc/ssl/certs/ca-certificates.crt',
'linux-gentoo': '/etc/ssl/certs/ca-certificates.crt',
'linux-fedora': '/etc/pki/tls/certs/ca-bundle.crt',
'linux-redhat': '/etc/pki/tls/certs/ca-bundle.crt',
'linux-suse': '/etc/ssl/ca-bundle.pem',
}
def get_os_name():
"""
Finds out OS name. For non-Linux system it will be just a plain
OS name (like FreeBSD), for Linux it will be "linux-<distro>",
where <distro> is the name of the distribution, as returned by
the first component of platform.linux_distribution.
Return value will be all-lowercase to avoid confusion about
proper name capitalisation.
"""
OS = platform.system().lower()
if OS.startswith('linux'):
DISTRO = platform.linux_distribution()[0]
if DISTRO:
OS = OS + "-%s" % DISTRO.split()[0].lower()
return OS
def get_os_sslcertfile_searchpath():
"""Returns search path for CA bundle for the current OS.
We will return an iterable even if configuration has just
a single value: it is easier for our callers to be sure
that they can iterate over result.
Returned value of None means that there is no search path
at all.
"""
OS = get_os_name()
l = None
if OS in __DEF_OS_LOCATIONS:
l = __DEF_OS_LOCATIONS[OS]
if not hasattr(l, '__iter__'):
l = (l, )
return l
def get_os_sslcertfile():
"""
Finds out the location for the distribution-specific
CA certificate file bundle.
Returns the location of the file or None if there is
no known CA certificate file or all known locations
correspond to non-existing filesystem objects.
"""
l = get_os_sslcertfile_searchpath()
if l == None:
return None
for f in l:
assert (type(f) == type(""))
if os.path.exists(f) and \
(os.path.isfile(f) or os.path.islink(f)):
return f
return None