rshim_selinux(8)

💅 rshim_selinux(8) — like, the whole manual, bestie

okay so this is rshim_selinux(8), the SELinux policy page for rshim. yes it's a manpage. no it's not boring. come sit with me 🫶

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✨ NAME ✨

rshim_selinux — Security Enhanced Linux Policy for the rshim processes 💖

🌸 DESCRIPTION 🌸

Security-Enhanced Linux secures the rshim processes via flexible mandatory access control. that's the whole vibe: SELinux is the bouncer, and it checks the list before letting anything happen.

The rshim processes execute with the rshim_t SELinux type. wanna check if you've got these processes running rn? just run ps with the -Z qualifier, easy.

for example:

ps -eZ | grep rshim_t

literally that's it. go off 👑

🦋 ENTRYPOINTS 🦋

The rshim_t SELinux type can be entered via the rshim_exec_t file type.

The default entrypoint paths for the rshim_t domain are:

/usr/bin/rshim

one singular path. she's an icon, she's exclusive 💅

🎀 PROCESS TYPES 🎀

SELinux defines process types (domains) for each process running on the system. yes, every process gets a little label. it's giving name tags at a party.

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

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

The following process types are defined for rshim:

rshim_t

Note: semanage permissive -a rshim_t can be used to make the process type rshim_t permissive. SELinux does not deny access to permissive process types, but the AVC (SELinux denials) messages are still generated. so like, she's off the hook but she's still being watched 💀

🌈 BOOLEANS 🌈

SELinux policy is customizable based on least access required. rshim policy is extremely flexible and has several booleans that allow you to manipulate the policy and run rshim with the tightest access possible. booleans are basically the settings switches and we LOVE a switch 🔥

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

🧚 MANAGED FILES 🧚

The SELinux process type rshim_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 isn't gonna override your normal permissions, she's just doing her own layer of checks. periodt.

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

root_t

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

rshim_var_run_t

/run/rshim.pid

⭐ FILE CONTEXTS ⭐

SELinux requires files to have an extended attribute to define the file type. no extended attribute, no entry, sorry bestie.

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 rshim policy is very flexible, allowing users to set up their rshim processes in as secure a method as possible.

🍓 STANDARD FILE CONTEXT

SELinux defines the file context types for the rshim. 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 rshim_exec_t '/srv/rshim/content(/.*)?'
restorecon -R -v /srv/myrshim_content

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

The following file types are defined for rshim:

• rshim_exec_t — set files with the rshim_exec_t type if you want to transition an executable to the rshim_t domain.
• rshim_unit_file_t — set files with the rshim_unit_file_t type if you want to treat the files as rshim unit content.
• rshim_var_run_t — set files with the rshim_var_run_t type if you want to store the rshim files under the /run or /var/run directory.

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 is temporary, permanent is permanent, don't get it twisted 💀

👑 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. yes a whole GUI, for when the terminal vibe check isn't it 🌈

💜 AUTHOR 💜

This manual page was auto-generated using sepolicy manpage. she was born automated, she's still iconic.

🔥 SEE ALSO 🔥

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

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and that's the page, bestie 🫶 this was the rshim_selinux(8) manpage from the rshim source, dated 26-10-06 — go be secure, mwah 💖✨🎀