snapperd_selinux(8)

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

💖 snapperd_selinux(8) — the glow-up edition 💖

okay bestie, welcome to snapperd_selinux(8), the manual page for the SELinux policy that keeps the snapperd processes on a leash. this is the whole lore, no skips, no cap. let's get into it 🫶

✨ NAME ✨

snapperd_selinux — the Security Enhanced Linux Policy for the snapperd processes. literally the whole point of this page 💅

🌸 DESCRIPTION 🌸

Security-Enhanced Linux secures the snapperd processes via flexible mandatory access control. yes, mandatory — SELinux is the main character and it will be respected ✨

The snapperd processes execute with the snapperd_t SELinux type. You can check if you have these processes running by executing the ps command with the -Z qualifier.

for example, run this little icon:

ps -eZ | grep snapperd_t

that's it, that's the vibe check 🔍

🦋 ENTRYPOINTS 🦋

The snapperd_t SELinux type can be entered via the snapperd_exec_t file type. so if you're wondering "how do i even get into this domain", that's the door 🚪✨

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

/usr/bin/snapperd, /usr/lib/snapper/systemd-helper

those two. periodt. 💅

👑 PROCESS TYPES 👑

SELinux defines process types (domains) for each process running on the system. yes, every process gets a whole personality type, it's giving astrology for daemons 🔮

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

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

The following process types are defined for snapperd:

  • snapperd_t
  • snapper_grub_plugin_t
  • snapper_tu_etc_plugin_t
  • snapper_sdbootutil_plugin_t
Note: semanage permissive -a snapperd_t can be used to make the process type snapperd_t permissive. SELinux does not deny access to permissive process types, but the AVC (SELinux denials) messages are still generated.

so like, permissive mode is the "i'm not mad, i'm just disappointed" setting — it won't block stuff, but the receipts (AVC messages) still show up 😭

🎀 BOOLEANS 🎀

SELinux policy is customizable based on least access required. snapperd policy is extremely flexible and has several booleans that allow you to manipulate the policy and run snapperd with the tightest access possible. lowkey iconic that you can just toggle the vibes 💅

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

see? three booleans, three little switches. flip responsibly 🫶

🌈 MANAGED FILES 🌈

The SELinux process type snapperd_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. so yeah — SELinux says yes, but the UID still has to have its own permission slip, and SELinux will not cover for it, 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

root_t

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

that's the whole list, every single path, i would never gatekeep 🫶

💜 FILE CONTEXTS 💜

SELinux requires files to have an extended attribute to define the file type. it's like a little name tag for your files, and honestly? slay 💅

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

⭐ STANDARD FILE CONTEXT ⭐

SELinux defines the file context types for the snapperd, 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.

like so:

semanage fcontext -a -t snapperd_exec_t '/srv/snapperd/content(/.*)?'
restorecon -R -v /srv/mysnapperd_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 snapperd:

snapperd_conf_t

  • Set files with the snapperd_conf_t type, if you want to treat the files as snapperd configuration data, usually stored under the /etc directory.

Paths:

/etc/snapper(/.*)?, /etc/sysconfig/snapper

snapperd_data_t

  • Set files with the snapperd_data_t type, if you want to treat the files as snapperd content.

Paths:

/mnt/(.*/)?.snapshots(/.*)?
/.snapshots(/.*)?
/etc/.snapshots(/.*)?
/opt/.snapshots(/.*)?
/usr/.snapshots(/.*)?
/var/.snapshots(/.*)?
/home/.snapshots(/.*)?
/home/(.*/)?.snapshots(/.*)?

snapperd_exec_t

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

Paths:

/usr/bin/snapperd, /usr/lib/snapper/systemd-helper

snapperd_log_t

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

snapperd_tmp_t

  • Set files with the snapperd_tmp_t type, if you want to store snapperd temporary files in the /tmp directories.
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 chcon is the "just for tonight" label and semanage fcontext + restorecon is the "we're making this official" label. know the difference, 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.

a whole little toolkit. go off, queen 👑✨

🌸 AUTHOR 🌸

This manual page was auto-generated using sepolicy manpage. no human wrote this, it was the machines, and honestly they ate 🤖💅

🦋 SEE ALSO 🦋

selinux(8), snapperd(8), semanage(8), restorecon(8), chcon(1), sepolicy(8), setsebool(8), snapper_grub_plugin_selinux(8), snapper_sdbootutil_plugin_selinux(8), snapper_tu_etc_plugin_selinux(8)

go read those too, i'm not gatekeeping the lore 🫶✨

and that's the page, bestie! this iconic little number is from snapperd, version/date 26-10-06, and it says snapperd_selinux(8) right there at the bottom like a signature 💖 slay, stay labeled, and may your contexts always be correct 🎀🌈

📦 where this page comes from