qgs_selinux(8)

💖 qgs_selinux — the manual page, but make it make sense 💖

okay so bestie, this is the qgs_selinux page from the SELinux Policy qgs manual — section 8, the big scary admin one 🫶. it's literally all about how SELinux locks down the qgs processes, and i'm gonna walk you through every single bit of it, no cap.

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✨ NAME ✨

qgs_selinux — Security Enhanced Linux Policy for the qgs processes 💅

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🌸 DESCRIPTION 🌸

Security-Enhanced Linux secures the qgs processes via flexible mandatory access control. that's the whole vibe — SELinux is the friend who checks your outfit before you leave the house, except the outfit is file access 🎀

The qgs processes execute with the qgs_t SELinux type. you can check if you've got these processes running by executing the ps command with the -Z qualifier. for example:

ps -eZ | grep qgs_t

like, that's it. that's the vibe check 🔥

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🦋 ENTRYPOINTS 🦋

The qgs_t SELinux type can be entered via the qgs_exec_t file type.

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

/usr/bin/qgs

one path. that's the door. iconic 👑

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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 qgs policy is very flexible, allowing users to setup their qgs processes in as secure a method as possible. like, it wants you to be safe, it's not being difficult on purpose 💜

The following process types are defined for qgs:

• qgs_t

Note: semanage permissive -a qgs_t can be used to make the process type qgs_t permissive. SELinux does not deny access to permissive process types, but the AVC (SELinux denials) messages are still generated. so like… it stops yelling at you but it's still writing in its diary about you 😭

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🍓 BOOLEANS 🍓

SELinux policy is customizable based on least access required. qgs policy is extremely flexible and has several booleans that allow you to manipulate the policy and run qgs with the tightest access possible. tightest access = the most put-together fit, obviously 💅

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 confined applications to use nscd shared memory, you must turn on the nscd_use_shm boolean. Enabled by default.

setsebool -P nscd_use_shm 1

all three enabled by default, so like, they already ate 🔥

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🌈 MANAGED FILES 🌈

The SELinux process type qgs_t can manage files labeled with the following file types. The paths listed are the default paths for these file types. note that the process's UID still needs to have DAC permissions — SELinux said "yes" but DAC can still say "girl, no" 🙈

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

qgs_var_lib_t

/var/lib/qgs(/.*)?

qgs_var_run_t

/run/tdx-qgs(/.*)?

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. it's like a name tag but for files, and the party is your filesystem 🎀

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 qgs policy is very flexible, allowing users to setup their qgs processes in as secure a method as possible. yes it repeats, no we're not skipping it, every detail stays 💖

⭐ STANDARD FILE CONTEXT ⭐

SELinux defines the file context types for the qgs. 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 qgs_exec_t '/srv/qgs/content(/.*)?'
restorecon -R -v /srv/myqgs_content

Note: SELinux often uses regular expressions to specify labels that match multiple files. yes queen, regexes, we love to see it 🦋

The following file types are defined for qgs:

qgs_etc_t

• Set files with the qgs_etc_t type, if you want to store qgs files in the /etc directories.

qgs_exec_t

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

qgs_var_lib_t

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

qgs_var_run_t

• Set files with the qgs_var_run_t type, if you want to store the qgs 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 vs permanent, know the difference or it will not stick, fr fr 😭

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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 when the terminal is doing too much 🫶

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🌸 AUTHOR 🌸

This manual page was auto-generated using sepolicy manpage. a bot wrote this. a bot with taste, apparently ✨

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🔥 SEE ALSO 🔥

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

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that's the whole page bestie, every flag, every path, every boolean, nothing skipped 💜

and like, credit where it's due: this came from the qgs manual, version/date 26-10-06 — go off, 26-10-06, you absolute icon 👑🎀