"semanage login -a" accepts whitespaces in user/group name
(e.g. users/groups from Active Directory), which may lead to issues down
the line since libsemanage doesn't expect whitespaces in
/var/lib/selinux/targeted/active/seusers and other config files.
Fixes:
Artificial but simple reproducer
# groupadd server_admins
# sed -i "s/^server_admins/server admins/" /etc/group
# semanage login -a -s staff_u %server\ admins
# semanage login -l (or "semodule -B")
libsemanage.parse_assert_ch: expected character ':', but found 'a' (/var/lib/selinux/targeted/active/seusers: 6):
%server admins:staff_u:s0-s0:c0.c1023 (No such file or directory).
libsemanage.seuser_parse: could not parse seuser record (No such file or directory).
libsemanage.dbase_file_cache: could not cache file database (No such file or directory).
libsemanage.enter_ro: could not enter read-only section (No such file or directory).
FileNotFoundError: [Errno 2] No such file or directory
Signed-off-by: Vit Mojzis <vmojzis@redhat.com>
