systemd_homed_selinux - Man Page
Security Enhanced Linux Policy for the systemd_homed processes
Description
Security-Enhanced Linux secures the systemd_homed processes via flexible mandatory access control.
The systemd_homed processes execute with the systemd_homed_t SELinux type. You can check if you have these processes running by executing the ps command with the -Z qualifier.
For example:
ps -eZ | grep systemd_homed_t
Entrypoints
The systemd_homed_t SELinux type can be entered via the user_home_t, systemd_homed_exec_t file types.
The default entrypoint paths for the systemd_homed_t domain are the following:
/home/[^/]+/.+, /usr/lib/systemd/systemd-homed
Process Types
SELinux defines process types (domains) for each process running on the system
You can see the context of a process using the -Z option to psbP
Policy governs the access confined processes have to files. SELinux systemd_homed policy is very flexible allowing users to setup their systemd_homed processes in as secure a method as possible.
The following process types are defined for systemd_homed:
systemd_homed_t
Note: semanage permissive -a systemd_homed_t can be used to make the process type systemd_homed_t permissive. SELinux does not deny access to permissive process types, but the AVC (SELinux denials) messages are still generated.
Booleans
SELinux policy is customizable based on least access required. systemd_homed policy is extremely flexible and has several booleans that allow you to manipulate the policy and run systemd_homed with the tightest access possible.
If you want to dontaudit all daemons scheduling requests (setsched, sys_nice), you must turn on the daemons_dontaudit_scheduling boolean. Enabled by default.
setsebool -P daemons_dontaudit_scheduling 1
If you want to allow all domains to execute in fips_mode, you must turn on the fips_mode boolean. Enabled by default.
setsebool -P fips_mode 1
If you want to allow system to run with NIS, you must turn on the nis_enabled boolean. Disabled by default.
setsebool -P nis_enabled 1
If you want to support NFS home directories, you must turn on the use_nfs_home_dirs boolean. Disabled by default.
setsebool -P use_nfs_home_dirs 1
If you want to support SAMBA home directories, you must turn on the use_samba_home_dirs boolean. Disabled by default.
setsebool -P use_samba_home_dirs 1
Managed Files
The SELinux process type systemd_homed_t can manage files labeled with the following file types. The paths listed are the default paths for these file types. Note the processes UID still need to have DAC permissions.
cifs_t
cluster_conf_t
/etc/cluster(/.*)?
cluster_var_lib_t
/var/lib/pcsd(/.*)?
/var/lib/cluster(/.*)?
/var/lib/openais(/.*)?
/var/lib/pengine(/.*)?
/var/lib/corosync(/.*)?
/usr/lib/heartbeat(/.*)?
/var/lib/heartbeat(/.*)?
/var/lib/pacemaker(/.*)?
cluster_var_run_t
/run/crm(/.*)?
/run/cman_.*
/run/rsctmp(/.*)?
/run/aisexec.*
/run/heartbeat(/.*)?
/run/pcsd-ruby.socket
/run/corosync-qnetd(/.*)?
/run/corosync-qdevice(/.*)?
/run/pcsd.socket
/run/corosync.pid
/run/cpglockd.pid
/run/rgmanager.pid
/run/cluster/rgmanager.sk
ecryptfs_t
/home/[^/]+/.Private(/.*)?
/home/[^/]+/.ecryptfs(/.*)?
fusefs_t
/run/user/[0-9]+/gvfs
krb5_host_rcache_t
/var/tmp/krb5_0.rcache2
/var/cache/krb5rcache(/.*)?
/var/tmp/nfs_0
/var/tmp/DNS_25
/var/tmp/host_0
/var/tmp/imap_0
/var/tmp/HTTP_23
/var/tmp/HTTP_48
/var/tmp/ldap_55
/var/tmp/ldap_487
/var/tmp/ldapmap1_0
nfs_t
root_t
/sysroot/ostree/deploy/.*-atomic/deploy(/.*)?
/
/initrd
systemd_homed_record_t
/var/lib/systemd/home/(.+).public
/var/lib/systemd/home/(.+).identity
/var/lib/systemd/home/local.public
/var/lib/systemd/home/local.private
/home/[^/]+/.identity
systemd_homed_tmpfs_t
udev_var_run_t
/run/udev(/.*)?
/dev/.udev(/.*)?
/run/libgpod(/.*)?
/run/PackageKit/udev(/.*)?
/dev/.udevdb
/dev/udev.tbl
unlabeled_t
user_home_type
all user home files
File Contexts
SELinux requires files to have an extended attribute to define the file type.
You can see the context of a file using the -Z option to lsbP
Policy governs the access confined processes have to these files. SELinux systemd_homed policy is very flexible allowing users to setup their systemd_homed processes in as secure a method as possible.
STANDARD FILE CONTEXT
SELinux defines the file context types for the systemd_homed, if you wanted to store files with these types in a different paths, you need to execute the semanage command to specify alternate labeling and then use restorecon to put the labels on disk.
semanage fcontext -a -t systemd_homed_exec_t '/srv/systemd_homed/content(/.*)?'
restorecon -R -v /srv/mysystemd_homed_content
Note: SELinux often uses regular expressions to specify labels that match multiple files.
The following file types are defined for systemd_homed:
systemd_homed_crypto_luks_t
- Set files with the systemd_homed_crypto_luks_t type, if you want to treat the files as systemd homed crypto luks data.
systemd_homed_exec_t
- Set files with the systemd_homed_exec_t type, if you want to transition an executable to the systemd_homed_t domain.
systemd_homed_library_dir_t
- Set files with the systemd_homed_library_dir_t type, if you want to treat the files as systemd homed library dir data.
systemd_homed_record_t
- Set files with the systemd_homed_record_t type, if you want to treat the files as systemd homed record data.
- Paths:
/var/lib/systemd/home/(.+).public, /var/lib/systemd/home/(.+).identity, /var/lib/systemd/home/local.public, /var/lib/systemd/home/local.private, /home/[^/]+/.identity
systemd_homed_runtime_dir_t
- Set files with the systemd_homed_runtime_dir_t type, if you want to treat the files as systemd homed runtime dir data.
systemd_homed_runtime_pipe_t
- Set files with the systemd_homed_runtime_pipe_t type, if you want to treat the files as systemd homed runtime pipe data.
systemd_homed_runtime_socket_t
- Set files with the systemd_homed_runtime_socket_t type, if you want to treat the files as systemd homed runtime socket data.
systemd_homed_runtime_work_dir_t
- Set files with the systemd_homed_runtime_work_dir_t type, if you want to treat the files as systemd homed runtime work dir data.
systemd_homed_tmpfs_t
- Set files with the systemd_homed_tmpfs_t type, if you want to store systemd homed files on a tmpfs file system.
systemd_homed_unit_file_t
- Set files with the systemd_homed_unit_file_t type, if you want to treat the files as systemd homed unit content.
- Paths:
/usr/lib/systemd/system/systemd-homed.service, /usr/lib/systemd/system/systemd-homed-activate.service
Note: File context can be temporarily modified with the chcon command. If you want to permanently change the file context you need to use the semanage fcontext command. This will modify the SELinux labeling database. You will need to use restorecon to apply the labels.
Commands
semanage fcontext can also be used to manipulate default file context mappings.
semanage permissive can also be used to manipulate whether or not a process type is permissive.
semanage module can also be used to enable/disable/install/remove policy modules.
semanage boolean can also be used to manipulate the booleans
system-config-selinux is a GUI tool available to customize SELinux policy settings.
Author
This manual page was auto-generated using sepolicy manpage .
See Also
selinux(8), systemd_homed(8), semanage(8), restorecon(8), chcon(1), sepolicy(8), setsebool(8)