lpr_selinux(8)

1lpr_selinux(8)                SELinux Policy lpr                lpr_selinux(8)
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NAME

6       lpr_selinux - Security Enhanced Linux Policy for the lpr processes
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DESCRIPTION

9       Security-Enhanced  Linux  secures the lpr processes via flexible manda‐
10       tory access control.
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12       The lpr processes execute with the lpr_t SELinux type. You can check if
13       you  have  these processes running by executing the ps command with the
14       -Z qualifier.
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16       For example:
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18       ps -eZ | grep lpr_t
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ENTRYPOINTS

23       The lpr_t SELinux type can be entered via the lpr_exec_t file type.
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25       The default entrypoint paths for the lpr_t domain are the following:
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27       /usr/bin/lp(.cups)?,    /usr/bin/lpq(.cups)?,     /usr/bin/lpr(.cups)?,
28       /usr/bin/lprm(.cups)?,  /usr/sbin/lpc(.cups)?, /usr/bin/cancel(.cups)?,
29       /usr/bin/lpstat(.cups)?,     /opt/gutenprint/bin(/.*)?,     /opt/guten‐
30       print/sbin(/.*)?,     /usr/linuxprinter/bin/l?lpr,    /usr/local/linux‐
31       printer/bin/l?lpr,         /usr/sbin/accept,          /usr/sbin/lpinfo,
32       /usr/sbin/lpmove, /usr/sbin/lpadmin, /usr/bin/lpoptions
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PROCESS TYPES

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

54       SELinux policy is customizable based on  least  access  required.   lpr
55       policy is extremely flexible and has several booleans that allow you to
56       manipulate the policy and run lpr with the tightest 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 determine whether to support lpd server, you  must  turn
157       on the use_lpd_server boolean. Disabled by default.
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159       setsebool -P use_lpd_server 1
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162
163       If  you  want  to  support  NFS  home directories, you must turn on the
164       use_nfs_home_dirs boolean. Disabled by default.
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166       setsebool -P use_nfs_home_dirs 1
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170       If you want to support SAMBA home directories, you  must  turn  on  the
171       use_samba_home_dirs boolean. Disabled by default.
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173       setsebool -P use_samba_home_dirs 1
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MANAGED FILES

178       The  SELinux  process type lpr_t can manage files labeled with the fol‐
179       lowing file types.  The paths listed are the default  paths  for  these
180       file types.  Note the processes UID still need to have DAC permissions.
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182       lpr_tmp_t
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185       print_spool_t
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187            /var/spool/lpd(/.*)?
188            /var/spool/cups(/.*)?
189            /var/spool/cups-pdf(/.*)?
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FILE CONTEXTS

193       SELinux requires files to have an extended attribute to define the file
194       type.
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196       You can see the context of a file using the -Z option to ls
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198       Policy governs the access  confined  processes  have  to  these  files.
199       SELinux  lpr  policy is very flexible allowing users to setup their lpr
200       processes in as secure a method as possible.
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202       STANDARD FILE CONTEXT
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204       SELinux defines the file context types for the lpr, if  you  wanted  to
205       store  files  with  these types in a diffent paths, you need to execute
206       the semanage command  to  sepecify  alternate  labeling  and  then  use
207       restorecon to put the labels on disk.
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209       semanage fcontext -a -t lpr_tmp_t '/srv/mylpr_content(/.*)?'
210       restorecon -R -v /srv/mylpr_content
211
212       Note:  SELinux  often  uses  regular expressions to specify labels that
213       match multiple files.
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215       The following file types are defined for lpr:
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219       lpr_exec_t
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221       - Set files with the lpr_exec_t type, if you want to transition an exe‐
222       cutable to the lpr_t domain.
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225       Paths:
226            /usr/bin/lp(.cups)?,  /usr/bin/lpq(.cups)?,  /usr/bin/lpr(.cups)?,
227            /usr/bin/lprm(.cups)?,    /usr/sbin/lpc(.cups)?,     /usr/bin/can‐
228            cel(.cups)?,  /usr/bin/lpstat(.cups)?,  /opt/gutenprint/bin(/.*)?,
229            /opt/gutenprint/sbin(/.*)?,           /usr/linuxprinter/bin/l?lpr,
230            /usr/local/linuxprinter/bin/l?lpr,               /usr/sbin/accept,
231            /usr/sbin/lpinfo,       /usr/sbin/lpmove,       /usr/sbin/lpadmin,
232            /usr/bin/lpoptions
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235       lpr_tmp_t
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237       - Set files with the lpr_tmp_t type, if you want to store lpr temporary
238       files in the /tmp directories.
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242       Note: File context can be temporarily modified with the chcon  command.
243       If  you want to permanently change the file context you need to use the
244       semanage fcontext command.  This will modify the SELinux labeling data‐
245       base.  You will need to use restorecon to apply the labels.
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COMMANDS

249       semanage  fcontext  can also be used to manipulate default file context
250       mappings.
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252       semanage permissive can also be used to manipulate  whether  or  not  a
253       process type is permissive.
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255       semanage  module can also be used to enable/disable/install/remove pol‐
256       icy modules.
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258       semanage boolean can also be used to manipulate the booleans
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261       system-config-selinux is a GUI tool available to customize SELinux pol‐
262       icy settings.
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AUTHOR

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