nut_upsd_selinux(8)

✨ nut_upsd_selinux(8) — the manual page bestie 💖

okay so this is the nut_upsd_selinux(8) manual page, and honestly? it's giving security slay. it's all about the SELinux policy for the nut_upsd processes. let's get into it, bestie 🫶

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🌸 NAME

nut_upsd_selinux — Security Enhanced Linux Policy for the nut_upsd processes. no cap, that's literally what it is 💅

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✨ DESCRIPTION

Security-Enhanced Linux secures the nut_upsd processes via flexible mandatory access control. it's like a bouncer for your processes, but make it iconic 👑

The nut_upsd processes execute with the nut_upsd_t SELinux type. you can check if you have these processes running by executing the ps command with the -Z qualifier. iykyk 🔥

For example:

ps -eZ | grep nut_upsd_t

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🚪 ENTRYPOINTS

The nut_upsd_t SELinux type can be entered via the nut_upsd_exec_t file type. it's the VIP entrance, fr fr 🎀

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

/usr/bin/upsd

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🧬 PROCESS TYPES

SELinux defines process types (domains) for each process running on the system. it's like every process gets its own little personality ✨

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

Policy governs the access confined processes have to files. SELinux nut_upsd policy is very flexible, allowing users to setup their nut_upsd processes in as secure a method as possible. it's literally so considerate 💖

The following process types are defined for nut_upsd:

• nut_upsd_t
• nut_upsdrvctl_t

Note: semanage permissive -a nut_upsd_t can be used to make the process type nut_upsd_t permissive. SELinux does not deny access to permissive process types, but the AVC (SELinux denials) messages are still generated. so it's like, not a free pass, but a softer no 💀

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🎛️ BOOLEANS

SELinux policy is customizable based on least access required. nut_upsd policy is extremely flexible and has several booleans that allow you to manipulate the policy and run nut_upsd with the tightest access possible. it's giving customizable queen 👑

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 system to run with NIS, you must turn on the nis_enabled boolean. Disabled by default.

setsebool -P nis_enabled 1

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📂 MANAGED FILES

The SELinux process type nut_upsd_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. it's a whole hierarchy, bestie 🦋

• 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

• nut_upsd_tmp_t
• nut_var_run_t

/run/nut(/.*)?

• 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 every file has a little label, and it's obsessed with organization 🎀

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 nut_upsd policy is very flexible, allowing users to setup their nut_upsd processes in as secure a method as possible. flexible AND secure? we love to see it 💅

STANDARD FILE CONTEXT

SELinux defines the file context types for the nut_upsd. 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. it's a two-step process, bestie, don't skip a step 💖

semanage fcontext -a -t nut_upsd_exec_t '/srv/nut_upsd/content(/.*)?'
restorecon -R -v /srv/mynut_upsd_content

Note: SELinux often uses regular expressions to specify labels that match multiple files. regex is that girl, honestly 🌈

The following file types are defined for nut_upsd:

• nut_upsd_exec_t — Set files with the nut_upsd_exec_t type, if you want to transition an executable to the nut_upsd_t domain. it's a whole transformation arc ✨
• nut_upsd_tmp_t — Set files with the nut_upsd_tmp_t type, if you want to store nut upsd temporary files in the /tmp directories. temp files but make it secure 🍓
• nut_upsdrvctl_exec_t — Set files with the nut_upsdrvctl_exec_t type, if you want to transition an executable to the nut_upsdrvctl_t domain. paths:

/usr/bin/upsdrvctl, /usr/bin/blazer_usb

• nut_upsdrvctl_tmp_t — Set files with the nut_upsdrvctl_tmp_t type, if you want to store nut upsdrvctl temporary files in the /tmp directories. more temp files, more secure vibes 🧚

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. so like, chcon is the quick fix, semanage is the permanent glow-up, and restorecon makes it official 👑

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🛠️ COMMANDS

semanage fcontext can also be used to manipulate default file context mappings. it's the main character of file contexts, honestly 🎀

semanage permissive can also be used to manipulate whether or not a process type is permissive. permission to be permissive? iconic 💅

semanage module can also be used to enable/disable/install/remove policy modules. modular AND flexible? we stan 💖

semanage boolean can also be used to manipulate the booleans. booleans are literally the on/off switches of SELinux, no cap 🔥

system-config-selinux is a GUI tool available to customize SELinux policy settings. for when you want to point and click instead of type, and that's valid 🫶

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✍️ AUTHOR

This manual page was auto-generated using sepolicy manpage. auto-generated but still slaying ✨

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👀 SEE ALSO

selinux(8), nut_upsd(8), semanage(8), restorecon(8), chcon(1), sepolicy(8), setsebool(8) — go read these too, bestie, they're all part of the extended universe 💜

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and that's the whole manual page, bestie. nut_upsd version 26-10-06, manual name nut_upsd_selinux(8). now go forth and configure your SELinux policy with confidence, because you ate that 💅💖✨