apm_selinux(8)

💅 apm_selinux(8) — like, the whole SELinux policy for apm, bestie

okay so this is the apm_selinux manual page (yes, section 8, we're being fancy) and it's literally all about how SELinux locks down the apm processes. grab a snack, we're doing policy 💖

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✨ NAME ✨

apm_selinux — Security Enhanced Linux Policy for the apm processes

Like, the whole entire vibe of this page in one line 🎀

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🌸 DESCRIPTION 🌸

Security-Enhanced Linux secures the apm processes via flexible mandatory access control. No cap, that's the whole point.

The apm processes execute with the apm_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 apm_t

go off, ps 👑 that -Z is doing the heavy lifting and she ate.

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🦋 ENTRYPOINTS 🦋

The apm_t SELinux type can be entered via the apm_exec_t file type.

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

/usr/bin/apm

that's it. one path. she's lowkey minimal and iconic for it ✨

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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

Policy governs the access confined processes have to files. SELinux apm policy is very flexible allowing users to setup their apm processes in as secure a method as possible. fr fr, extremely flexible.

The following process types are defined for apm:

apmd_t, apm_t

💀 Note: semanage permissive -a apm_t can be used to make the process type apm_t permissive. SELinux does not deny access to permissive process types, but the AVC (SELinux denials) messages are still generated. so like, she stops yelling at you but she's still journaling about it, iykyk.

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🎀 BOOLEANS 🎀

SELinux policy is customizable based on least access required. apm policy is extremely flexible and has several booleans that allow you to manipulate the policy and run apm with the tightest access possible. tightest access possible, bestie — we love a locked-down queen 🔥

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

that -P is important, she makes it persist. don't forget her 🫶

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🌈 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 ls

Policy governs the access confined processes have to these files. SELinux apm policy is very flexible allowing users to setup their apm processes in as secure a method as possible. (yes she said it again, she means it 💅)

⭐ STANDARD FILE CONTEXT ⭐

SELinux defines the file context types for the apm, 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 apmd_exec_t '/srv/apm/content(/.*)?'
restorecon -R -v /srv/myapm_content

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

The following file types are defined for apm:

• apm_exec_t — Set files with the apm_exec_t type, if you want to transition an executable to the apm_t domain. 🚀
• 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, bestie — know the difference or cry about it later 😭

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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. like, point-and-click SELinux, we love accessibility 💖

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👑 AUTHOR 👑

This manual page was auto-generated using sepolicy manpage. yeah, a robot wrote it, and honestly? she devoured. 🤖✨

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🔥 SEE ALSO 🔥

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

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and that's the tea ☕ — this page is from apm, dated 26-10-06, and it's apm_selinux(8) if you need to cite her in your group chat. mwah 💋 🌸 🫶