systemd_..._selinux(8)

💅 systemd_tmpfiles_selinux(8) — the manual, but make it make sense

okay so bestie, grab a lil snack because we're talking about systemd_tmpfiles_selinux — that's the Security Enhanced Linux Policy for the systemd_tmpfiles processes. yes it's a mouthful, no you don't have to say it out loud 🎀

This page lives in the SELinux Policy systemd_tmpfiles manual, and the page name is systemd_..._selinux(8) — iykyk, the dots are doing a lot of work 💀

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✨ NAME ✨

systemd_tmpfiles_selinux — Security Enhanced Linux Policy for the systemd_tmpfiles processes. that's it, that's the whole vibe 🫶

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🌸 DESCRIPTION 🌸

Security-Enhanced Linux secures the systemd_tmpfiles processes via flexible mandatory access control. flexible! mandatory! access control! we love a triple threat 👑

The systemd_tmpfiles processes execute with the systemd_tmpfiles_t SELinux type. wanna check if you've got these processes running? run the ps command with the -Z qualifier, like this:

ps -eZ | grep systemd_tmpfiles_t

literally that simple, no cap 💖

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🦋 ENTRYPOINTS 🦋

The systemd_tmpfiles_t SELinux type can be entered via the systemd_tmpfiles_exec_t file type. that's the doorway, that's the portal, that's the main character entrance 🚪✨

The default entrypoint paths for the systemd_tmpfiles_t domain are the following:

• /usr/bin/systemd-tmpfiles
• /usr/lib/systemd/systemd-tmpfiles

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💜 PROCESS TYPES 💜

SELinux defines process types (domains) for each process running on the system. every process gets a lil label, it's giving personalized name tag at a party 🎀

You can see the context of a process using the -Z option to ps. yes, -Z again. iconic, consistent, slay.

Policy governs the access confined processes have to files. SELinux systemd_tmpfiles policy is very flexible allowing users to setup their systemd_tmpfiles processes in as secure a method as possible. secure method! as possible! we stan 🔥

The following process types are defined for systemd_tmpfiles:

• systemd_tmpfiles_t

Note: semanage permissive -a systemd_tmpfiles_t can be used to make the process type systemd_tmpfiles_t permissive. SELinux does not deny access to permissive process types, but the AVC (SELinux denials) messages are still generated. so like, it won't block you, but it will be writing about it in its diary 📓👀

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🍓 BOOLEANS 🍓

SELinux policy is customizable based on least access required. systemd_tmpfiles policy is extremely flexible and has several booleans that allow you to manipulate the policy and run systemd_tmpfiles with the tightest access possible. tightest access possible = the fitted-to-you vibe check 🧚

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

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🌈 MANAGED FILES 🌈

The SELinux process type systemd_tmpfiles_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 — SELinux is not out here doing everything for you, bestie, the UID still has a job 💅

• 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

• 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

• non_auth_file_type

(no default paths listed for this one, it's mysterious like that 🙈)

• root_t

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

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💖 FILE CONTEXTS 💖

SELinux requires files to have an extended attribute to define the file type. like a little sticker on every file, honestly adorable 🏷️✨

You can see the context of a file using the -Z option to ls. -Z really said "I'm everywhere and I'm thriving" 💀

Policy governs the access confined processes have to these files. SELinux systemd_tmpfiles policy is very flexible allowing users to setup their systemd_tmpfiles processes in as secure a method as possible. (yes this sentence is a repeat, no I'm not sorry, the policy is that flexible 🫶)

🎀 STANDARD FILE CONTEXT 🎀

SELinux defines the file context types for the systemd_tmpfiles, 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_tmpfiles_exec_t
'/srv/systemd_tmpfiles/content(/.*)?'
restorecon -R -v /srv/mysystemd_tmpfiles_content

Note: SELinux often uses regular expressions to specify labels that match multiple files. regex girlies rise 🙌

The following file types are defined for systemd_tmpfiles:

systemd_tmpfiles_exec_t

• Set files with the systemd_tmpfiles_exec_t type, if you want to transition an executable to the systemd_tmpfiles_t domain.

Paths:

/usr/bin/systemd-tmpfiles, /usr/lib/systemd/systemd-tmpfiles

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 = chcon, permanent = semanage fcontext + restorecon. write that down, it's on the test 📝💀

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⭐ 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 the girlies who like a little clicky-click 🖱️💅

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👑 AUTHOR 👑

This manual page was auto-generated using sepolicy manpage. not me being written by a script and still serving this much cunt 💀✨

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🔥 SEE ALSO 🔥

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

go read those too, bestie, the lore is deep 📚🫶

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and that's the page!! footer tea for the record-keepers: this is page systemd_tmpfiles, from 26-10-06, living under the systemd_..._selinux(8) manual — mwah, go forth and label things responsibly 💖🎀🦋