getty_selinux(8)

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

💖 NAME 💖

okay so bestie, this is getty_selinux — the Security Enhanced Linux Policy for the getty processes ✨ (yes, the whole manual page is for the getty_selinux(8) page, and we're folding that manual name right in here so nothing gets lost 💅).

🌸 DESCRIPTION 🌸

Security-Enhanced Linux secures the getty processes via flexible mandatory access control. no cap, that's the whole vibe 🔥

The getty processes execute with the getty_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 getty_t

🦋 ENTRYPOINTS 🦋

The getty_t SELinux type can be entered via the getty_exec_t file type.

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

/usr/bin/.*getty

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

The following process types are defined for getty:

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

🎀 BOOLEANS 🎀

SELinux policy is customizable based on least access required. getty policy is extremely flexible and has several booleans that allow you to manipulate the policy and run getty with the tightest access possible.

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 logging in and using the system from /dev/console, you must turn on the login_console_enabled boolean. Enabled by default.

setsebool -P login_console_enabled 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 getty_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.

  • getty_lock_t — no extra paths listed here, it's giving minimal energy 🫶
  • getty_log_t — log data vibes:
/var/log/mgetty.*.log.*
/var/log/vgetty.*.log.*
  • getty_tmp_t — temporary file type, no extra paths listed ✨
  • getty_var_run_t — run/spool things:
/var/spool/fax(/.*)?
/run/mgetty.pid.*
/var/spool/voice(/.*)?
/run/agetty.reload.*
  • initrc_var_run_t — initrc run files:
/run/sysconfig(/.*)?
/run/utmp
/run/keymap
/run/numlock-on
/run/setleds-on
/run/runlevel.dir
/run/setmixer_flag
/run/bootsplashctl
  • krb5_host_rcache_t — Kerberos host rcache files:
/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
  • lockdev_lock_t — lockdev lock files:
/run/lock/lockdev(/.*)?
  • var_run_t — general run files:
/run/.*
/var/lib/ntp/var/run(/.*)?
/run
/run
/var/spool/postfix/pid
  • wtmp_t — wtmp files:
/var/log/wtmp.*
  • wtmpdb_journal_t — wtmpdb journal:
/var/lib/wtmpdb/wtmp.db-journal
  • wtmpdb_t — wtmpdb files:
/var/lib/wtmpdb(/.*)?

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

⭐ STANDARD FILE CONTEXT ⭐

SELinux defines the file context types for the getty, 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 getty_exec_t '/srv/getty/content(/.*)?'
restorecon -R -v /srv/mygetty_content
Note: SELinux often uses regular expressions to specify labels that match multiple files. iykyk 😌

The following file types are defined for getty:

  • getty_etc_t — Set files with the getty_etc_t type, if you want to store getty files in the /etc directories.
  • getty_exec_t — Set files with the getty_exec_t type, if you want to transition an executable to the getty_t domain.
  • getty_lock_t — Set files with the getty_lock_t type, if you want to treat the files as getty lock data, stored under the /var/lock directory.
  • getty_log_t — Set files with the getty_log_t type, if you want to treat the data as getty log data, usually stored under the /var/log directory.

Paths:

/var/log/mgetty.*.log.*, /var/log/vgetty.*.log.*
  • getty_tmp_t — Set files with the getty_tmp_t type, if you want to store getty temporary files in the /tmp directories.
  • getty_unit_file_t — Set files with the getty_unit_file_t type, if you want to treat the files as getty unit content.
  • getty_var_run_t — Set files with the getty_var_run_t type, if you want to store the getty files under the /run or /var/run directory.

Paths:

/var/spool/fax(/.*)?, /run/mgetty.pid.*, /var/spool/voice(/.*)?,
/run/agetty.reload.*
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. 💅

🌈 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.

💜 AUTHOR 💜

This manual page was auto-generated using sepolicy manpage .

🍓 SEE ALSO 🍓

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

and that's the whole page, bestie 🫶 — getty 26-10-06, getty_selinux(8), signed off with so much SELinux love 💖✨

📦 where this page comes from