apmd_selinux(8)

📦
version 20250627+git412.dbf877ab7 · 7 versions
, in opensuse-leap 16.0

✨ apmd_selinux(8) ✨

Okay bestie, so this is the apmd_selinux manual page — like, the SELinux policy page for the apmd processes, from the SELinux Policy apmd corner of the universe. Buckle up, we're getting into it 💅

🌸 NAME 🌸

apmd_selinux — Security Enhanced Linux Policy for the apmd processes. That's it, that's the whole vibe 🫶

✨ SYNOPSIS ✨

Honestly? There isn't one, bestie. This page is pure lore. No cap.

🦋 DESCRIPTION 🦋

Security-Enhanced Linux secures the apmd processes via flexible mandatory access control. Yes, mandatory — SELinux is literally the main character who doesn't take no for an answer 💀

The apmd processes execute with the apmd_t SELinux type. Wanna check if you've got these processes running? Just execute the ps command with the -Z qualifier, easy.

For example:

ps -eZ | grep apmd_t

That's the whole check. Iconic, honestly.

🎀 ENTRYPOINTS 🎀

The apmd_t SELinux type can be entered via the apmd_exec_t file type. That's the doorway, iykyk 🚪✨

The default entrypoint paths for the apmd_t domain are, and I cannot stress this enough, exactly these:

  • /usr/bin/apmd
  • /usr/bin/acpid
  • /usr/bin/powersaved

👑 PROCESS TYPES 👑

SELinux defines process types (domains) for each process running on the system. Every process gets a little label, like a name tag at a party but for security 🎉

You can see the context of a process using the -Z option to ps.

Policy governs the access confined processes have to files. SELinux apmd policy is very flexible, allowing users to set up their apmd processes in as secure a method as possible. Flexible and secure? We love a multitasker.

The following process types are defined for apmd:

  • apmd_t
  • apm_t
Note: semanage permissive -a apmd_t can be used to make the process type apmd_t permissive. SELinux does not deny access to permissive process types, but the AVC (SELinux denials) messages are still generated. So like, it stops blocking you, but it still talks about you behind your back 😭

💖 BOOLEANS 💖

SELinux policy is customizable based on least access required — minimal effort, maximal security, the dream. apmd policy is extremely flexible and has several booleans that allow you to manipulate the policy and run apmd with the tightest access possible. Tightest access, bestie 🔥

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

🌈 MANAGED FILES 🌈

The SELinux process type apmd_t can manage files labeled with the following file types. The paths listed are the default paths for these file types. And lowkey important: the process's UID still needs to have DAC permissions. SELinux isn't doing all the work for you, babes 💅

adjtime_t

  • /etc/adjtime

apmd_lock_t

  • /run/lock/lmt-req.lock
  • /run/lock/subsys/acpid
  • /run/lock/subsys/lmt-req.lock

apmd_log_t

  • /var/log/acpid.*

apmd_tmp_t

(no default paths listed — she's mysterious like that 🫧)

apmd_var_lib_t

  • /var/lib/acpi(/.*)?

apmd_var_run_t

  • /run/.?acpid.socket
  • /run/apmd.pid
  • /run/acpid.pid
  • /run/powersaved.pid
  • /run/powersave_socket

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

devicekit_var_log_t

  • /var/log/pm-suspend.log.*
  • /var/log/pm-powersave.log.*

devicekit_var_run_t

  • /run/udisks.*
  • /run/devkit(/.*)?
  • /run/upower(/.*)?
  • /run/pm-utils(/.*)?
  • /run/DeviceKit-disks(/.*)?

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

root_t

  • /sysroot/.aleph-version.json
  • /sysroot/ostree/deploy/.*-atomic/deploy(/.*)?
  • /
  • /initrd
  • /var/lib/ntp

sysctl_type

(no default paths listed — a whole mood 🙈)

sysfs_t

  • /sys(/.*)?

systemd_passwd_var_run_t

  • /run/systemd/ask-password(/.*)?
  • /run/systemd/ask-password-block(/.*)?

🧚 FILE CONTEXTS 🧚

SELinux requires files to have an extended attribute to define the file type. Yes, an actual extended attribute. It's giving commitment 💍

You can see the context of a file using the -Z option to ls.

Policy governs the access confined processes have to these files. SELinux apmd policy is very flexible, allowing users to set up their apmd processes in as secure a method as possible.

⭐ STANDARD FILE CONTEXT ⭐

SELinux defines the file context types for the apmd. If you wanted to store files with these types in different paths, you need to execute the semanage command to specify alternate labeling, and then use restorecon to put the labels on disk. Two-step glow-up ✨

semanage fcontext -a -t apmd_exec_t '/srv/apmd/content(/.*)?'
restorecon -R -v /srv/myapmd_content
Note: SELinux often uses regular expressions to specify labels that match multiple files. Regex girlies, rise 🫶

The following file types are defined for apmd:

apmd_exec_t

  • Set files with the apmd_exec_t type if you want to transition an executable to the apmd_t domain.

Paths:

/usr/bin/apmd, /usr/bin/acpid, /usr/bin/powersaved

apmd_initrc_exec_t

  • Set files with the apmd_initrc_exec_t type if you want to transition an executable to the apmd_initrc_t domain.

apmd_lock_t

  • Set files with the apmd_lock_t type if you want to treat the files as apmd lock data, stored under the /var/lock directory.

Paths:

/run/lock/lmt-req.lock, /run/lock/subsys/acpid,
/run/lock/subsys/lmt-req.lock

apmd_log_t

  • Set files with the apmd_log_t type if you want to treat the data as apmd log data, usually stored under the /var/log directory.

apmd_tmp_t

  • Set files with the apmd_tmp_t type if you want to store apmd temporary files in the /tmp directories.

apmd_unit_file_t

  • Set files with the apmd_unit_file_t type if you want to treat the files as apmd unit content.

apmd_var_lib_t

  • Set files with the apmd_var_lib_t type if you want to store the apmd files under the /var/lib directory.

apmd_var_run_t

  • Set files with the apmd_var_run_t type if you want to store the apmd files under the /run or /var/run directory.

Paths:

/run/.?acpid.socket, /run/apmd.pid, /run/acpid.pid,
/run/powersaved.pid, /run/powersave_socket
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. Temporary vs permanent, choose your fighter 💀

🍓 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. A GUI! For when the terminal is doing too much 🖥️✨

💜 AUTHOR 💜

This manual page was auto-generated using sepolicy manpage. She wrote herself, honestly iconic.

🌟 SEE ALSO 🌟

selinux(8), apmd(8), semanage(8), restorecon(8), chcon(1), sepolicy(8), setsebool(8)

And that's the page, bestie! This little masterpiece is from apmd, dated 26-10-06, and it lives at apmd_selinux(8) — go forth and label responsibly 💅🎀🦋

📦 where this page comes from