brltty_selinux(8)

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

💖 brltty_selinux(8) — the SELinux policy for brltty, explained 🎀

okay bestie, so this is the manual page brltty_selinux(8) from the SELinux Policy brltty collection, and it's literally all about how SELinux keeps the brltty processes on a leash. it's giving strict-parent energy and honestly? iconic. 🫶

✨ NAME ✨

brltty_selinux — the Security Enhanced Linux Policy for the brltty processes. that's the whole vibe.

🌸 DESCRIPTION 🌸

Security-Enhanced Linux secures the brltty processes via flexible mandatory access control. flexible and mandatory, the duality of girlboss. 💅

The brltty processes execute with the brltty_t SELinux type. wanna check if you've got these processes running? just run the ps command with the -Z qualifier, easy peasy:

ps -eZ | grep brltty_t

no cap, that's it. 🦋

🚪 ENTRYPOINTS 🚪

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

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

/usr/bin/brltty

one path. one destiny. 🎀

👑 PROCESS TYPES 👑

SELinux defines process types (domains) for each process running on the system. yes, every process gets its own little domain. main character energy for everyone, we love to see it. 🌈

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 brltty policy is very flexible, allowing users to setup their brltty processes in as secure a method as possible. tight security but make it customizable. 💜

The following process types are defined for brltty:

  • brltty_t
Note: semanage permissive -a brltty_t can be used to make the process type brltty_t permissive. SELinux does not deny access to permissive process types, but the AVC (SELinux denials) messages are still generated. so like, it stops enforcing but it's still watching you and taking notes 😭

🔘 BOOLEANS 🔘

SELinux policy is customizable based on least access required. the brltty policy is extremely flexible and has several booleans that allow you to manipulate the policy and run brltty with the tightest access possible. bestie, these are the little switches that change everything. 🔥

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 deny all system processes and Linux users to use bluetooth wireless technology, you must turn on the deny_bluetooth boolean. Disabled by default.

setsebool -P deny_bluetooth 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 brltty_t can manage files labeled with the following file types. the paths listed are the default paths for these file types. ⚠️ heads up: the process's UID still needs to have DAC permissions — SELinux ain't doing all the work for you, bestie.

brltty_log_t

/tmp/brltty.log.*

brltty_var_lib_t

/var/lib/BrlAPI(/.*)?
/var/lib/brltty(/.*)?

brltty_var_run_t

/run/brltty(/.*)?

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

root_t

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

🏷️ FILE CONTEXTS 🏷️

SELinux requires files to have an extended attribute to define the file type. it's like a name tag but for files, lowkey obsessed. 🎀

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

Policy governs the access confined processes have to these files. the SELinux brltty policy is very flexible, allowing users to setup their brltty processes in as secure a method as possible. (yes, this part says it twice. it's that flexible. 💅)

⭐ STANDARD FILE CONTEXT ⭐

SELinux defines the file context types for the brltty, so 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. 🌸

semanage fcontext -a -t brltty_exec_t '/srv/brltty/content(/.*)?'
restorecon -R -v /srv/mybrltty_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 brltty:

brltty_exec_t

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

brltty_log_t

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

brltty_unit_file_t

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

brltty_var_lib_t

  • Set files with the brltty_var_lib_t type, if you want to store the brltty files under the /var/lib directory.

Paths:

/var/lib/BrlAPI(/.*)?, /var/lib/brltty(/.*)?

brltty_var_run_t

  • Set files with the brltty_var_run_t type, if you want to store the brltty 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 fix vs. permanent glow-up, choose wisely bestie 😭

🛠️ 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. point-and-click girlies, this one's for you 🖱️✨

💜 AUTHOR 💜

This manual page was auto-generated using sepolicy manpage. a bot wrote this and honestly it ate. 🤖💅

🔗 SEE ALSO 🔗

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

and that's the whole page bestie!! 🌈 this edition of brltty_selinux(8) came from the brltty source, version/date 26-10-06 — go off, you gorgeous, securely-confined processes. 💖✨🎀🦋

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