phc2sys_selinux(8)

💅 phc2sys_selinux — the SELinux glow-up for phc2sys

okay so bestie, welcome to the phc2sys_selinux(8) page ✨ this is the SELinux policy manual for the phc2sys processes, and honestly it's giving "niche but iconic." let's get into it 🫶

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✨ NAME ✨

phc2sys_selinux — Security Enhanced Linux Policy for the phc2sys processes 💖

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🌸 DESCRIPTION 🌸

Security-Enhanced Linux secures the phc2sys processes via flexible mandatory access control. no cap, that's the whole vibe — SELinux is the bodyguard, phc2sys is the main character 👑

The phc2sys processes execute with the phc2sys_t SELinux type. bestie you can literally check if you have these processes running by executing the ps command with the -Z qualifier 👀

For example:

ps -eZ | grep phc2sys_t

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🦋 ENTRYPOINTS 🦋

The phc2sys_t SELinux type can be entered via the phc2sys_exec_t file type. that's the doorway, fr fr 🚪

The default entrypoint paths for the phc2sys_t domain are the following:

/usr/bin/phc2sys

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💜 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 ps — like a little spotlight on your process, lowkey cute 🔍

Policy governs the access confined processes have to files. SELinux phc2sys policy is very flexible allowing users to setup their phc2sys processes in as secure a method as possible. slay 💅

The following process types are defined for phc2sys:

phc2sys_t

Note: semanage permissive -a phc2sys_t can be used to make the process type phc2sys_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's still gonna talk about you behind your back 😭 the receipts stay.

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🎀 BOOLEANS 🎀

SELinux policy is customizable based on least access required. phc2sys policy is extremely flexible and has several booleans that allow you to manipulate the policy and run phc2sys with the tightest access possible. tightest access = the most locked-down, most secure little fit 🧚

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

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🌈 MANAGED FILES 🌈

The SELinux process type phc2sys_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 do DAC's homework for it, okay? 🙈

chronyd_tmpfs_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

gpsd_tmpfs_t

ntpd_tmpfs_t

root_t

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

timemaster_tmpfs_t

timemaster_var_run_t

/run/timemaster(/.*)?

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⭐ FILE CONTEXTS ⭐

SELinux requires files to have an extended attribute to define the file type. it's like every file wears a tiny name tag 🏷️

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 phc2sys policy is very flexible allowing users to setup their phc2sys processes in as secure a method as possible.

🍓 STANDARD FILE CONTEXT

SELinux defines the file context types for the phc2sys, 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. relabeling arc, we love to see it ✨

semanage fcontext -a -t phc2sys_exec_t '/srv/phc2sys/content(/.*)?'
restorecon -R -v /srv/myphc2sys_content

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

The following file types are defined for phc2sys:

phc2sys_exec_t

• Set files with the phc2sys_exec_t type, if you want to transition an executable to the phc2sys_t domain.

phc2sys_unit_file_t

• Set files with the phc2sys_unit_file_t type, if you want to treat the files as phc2sys unit content.

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, know the difference bestie 💀

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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. yes, a GUI, for when clicking is the mood 🖱️💖

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👑 AUTHOR 👑

This manual page was auto-generated using sepolicy manpage. robot wrote it, we just gave it the group-chat energy 🤖💅

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🌟 SEE ALSO 🌟

selinux(8), phc2sys(8), semanage(8), restorecon(8), chcon(1), sepolicy(8), setsebool(8)

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okay that's the whole page, no notes 🫶 this was phc2sys man page, dated 26-10-06, version line phc2sys_selinux(8) — go forth and label responsibly, ily, bye 💜🎀