user_screen_selinux(8)

1user_screen_selinux(8)    SELinux Policy user_screen    user_screen_selinux(8)
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NAME

6       user_screen_selinux   -   Security   Enhanced   Linux  Policy  for  the
7       user_screen processes
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DESCRIPTION

10       Security-Enhanced Linux secures the user_screen processes via  flexible
11       mandatory access control.
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13       The  user_screen processes execute with the user_screen_t SELinux type.
14       You can check if you have these processes running by executing  the  ps
15       command with the -Z qualifier.
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17       For example:
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19       ps -eZ | grep user_screen_t
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ENTRYPOINTS

24       The  user_screen_t  SELinux  type  can be entered via the screen_exec_t
25       file type.
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27       The default entrypoint paths for the user_screen_t domain are the  fol‐
28       lowing:
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30       /usr/bin/tmux, /usr/bin/screen
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PROCESS TYPES

33       SELinux defines process types (domains) for each process running on the
34       system
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36       You can see the context of a process using the -Z option to ps
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38       Policy governs the access confined processes have  to  files.   SELinux
39       user_screen  policy  is  very  flexible  allowing  users to setup their
40       user_screen processes in as secure a method as possible.
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42       The following process types are defined for user_screen:
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44       user_screen_t
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46       Note: semanage permissive -a user_screen_t can  be  used  to  make  the
47       process  type user_screen_t permissive. SELinux does not deny access to
48       permissive process types, but the AVC (SELinux  denials)  messages  are
49       still generated.
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BOOLEANS

53       SELinux   policy  is  customizable  based  on  least  access  required.
54       user_screen policy is extremely flexible and has several booleans  that
55       allow  you to manipulate the policy and run user_screen with the tight‐
56       est access possible.
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60       If you want to allow users to resolve user passwd entries directly from
61       ldap  rather  then  using  a  sssd server, you must turn on the authlo‐
62       gin_nsswitch_use_ldap boolean. Disabled by default.
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64       setsebool -P authlogin_nsswitch_use_ldap 1
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68       If you want to deny any process from ptracing or  debugging  any  other
69       processes,  you  must  turn  on  the  deny_ptrace  boolean.  Enabled by
70       default.
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72       setsebool -P deny_ptrace 1
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76       If you want to allow any process  to  mmap  any  file  on  system  with
77       attribute  file_type,  you must turn on the domain_can_mmap_files bool‐
78       ean. Enabled by default.
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80       setsebool -P domain_can_mmap_files 1
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84       If you want to allow all domains write to kmsg_device, while kernel  is
85       executed  with  systemd.log_target=kmsg parameter, you must turn on the
86       domain_can_write_kmsg boolean. Disabled by default.
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88       setsebool -P domain_can_write_kmsg 1
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92       If you want to allow all domains to use other domains file descriptors,
93       you must turn on the domain_fd_use boolean. Enabled by default.
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95       setsebool -P domain_fd_use 1
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99       If  you  want to allow all domains to have the kernel load modules, you
100       must  turn  on  the  domain_kernel_load_modules  boolean.  Disabled  by
101       default.
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103       setsebool -P domain_kernel_load_modules 1
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107       If you want to allow all domains to execute in fips_mode, you must turn
108       on the fips_mode boolean. Enabled by default.
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110       setsebool -P fips_mode 1
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114       If you want to enable reading of urandom for all domains, you must turn
115       on the global_ssp boolean. Disabled by default.
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117       setsebool -P global_ssp 1
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121       If  you  want  to allow confined applications to run with kerberos, you
122       must turn on the kerberos_enabled boolean. Enabled by default.
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124       setsebool -P kerberos_enabled 1
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128       If you want to allow system to run with  NIS,  you  must  turn  on  the
129       nis_enabled boolean. Disabled by default.
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131       setsebool -P nis_enabled 1
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135       If  you  want to allow confined applications to use nscd shared memory,
136       you must turn on the nscd_use_shm boolean. Disabled by default.
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138       setsebool -P nscd_use_shm 1
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142       If you want to support ecryptfs home directories, you must turn on  the
143       use_ecryptfs_home_dirs boolean. Disabled by default.
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145       setsebool -P use_ecryptfs_home_dirs 1
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149       If  you  want  to support fusefs home directories, you must turn on the
150       use_fusefs_home_dirs boolean. Disabled by default.
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152       setsebool -P use_fusefs_home_dirs 1
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156       If you want to support NFS home  directories,  you  must  turn  on  the
157       use_nfs_home_dirs boolean. Disabled by default.
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159       setsebool -P use_nfs_home_dirs 1
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163       If  you  want  to  support SAMBA home directories, you must turn on the
164       use_samba_home_dirs boolean. Disabled by default.
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166       setsebool -P use_samba_home_dirs 1
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MANAGED FILES

171       The SELinux process type user_screen_t can manage  files  labeled  with
172       the  following  file types.  The paths listed are the default paths for
173       these file types.  Note the processes UID still need to have  DAC  per‐
174       missions.
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176       faillog_t
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178            /var/log/btmp.*
179            /var/log/faillog.*
180            /var/log/tallylog.*
181            /var/run/faillock(/.*)?
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183       initrc_var_run_t
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185            /var/run/utmp
186            /var/run/random-seed
187            /var/run/runlevel.dir
188            /var/run/setmixer_flag
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190       user_tmp_type
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192            all user tmp files
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COMMANDS

196       semanage  fcontext  can also be used to manipulate default file context
197       mappings.
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199       semanage permissive can also be used to manipulate  whether  or  not  a
200       process type is permissive.
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202       semanage  module can also be used to enable/disable/install/remove pol‐
203       icy modules.
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205       semanage boolean can also be used to manipulate the booleans
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208       system-config-selinux is a GUI tool available to customize SELinux pol‐
209       icy settings.
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AUTHOR

213       This manual page was auto-generated using sepolicy manpage .
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