1readahead_selinux(8) SELinux Policy readahead readahead_selinux(8)
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6 readahead_selinux - Security Enhanced Linux Policy for the readahead
7 processes
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10 Security-Enhanced Linux secures the readahead processes via flexible
11 mandatory access control.
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13 The readahead processes execute with the readahead_t SELinux type. You
14 can check if you have these processes running by executing the ps com‐
15 mand with the -Z qualifier.
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17 For example:
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19 ps -eZ | grep readahead_t
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24 The readahead_t SELinux type can be entered via the readahead_exec_t
25 file type.
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27 The default entrypoint paths for the readahead_t domain are the follow‐
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30 /sbin/readahead.*, /usr/sbin/readahead.*, /usr/lib/systemd/systemd-
31 readahead.*
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34 SELinux defines process types (domains) for each process running on the
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37 You can see the context of a process using the -Z option to ps
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39 Policy governs the access confined processes have to files. SELinux
40 readahead policy is very flexible allowing users to setup their reada‐
41 head processes in as secure a method as possible.
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43 The following process types are defined for readahead:
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45 readahead_t
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47 Note: semanage permissive -a readahead_t can be used to make the
48 process type readahead_t permissive. SELinux does not deny access to
49 permissive process types, but the AVC (SELinux denials) messages are
50 still generated.
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54 SELinux policy is customizable based on least access required. reada‐
55 head policy is extremely flexible and has several booleans that allow
56 you to manipulate the policy and run readahead with the tightest access
57 possible.
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61 If you want to allow all domains to execute in fips_mode, you must turn
62 on the fips_mode boolean. Enabled by default.
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64 setsebool -P fips_mode 1
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69 SELinux requires files to have an extended attribute to define the file
70 type.
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72 You can see the context of a file using the -Z option to ls
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74 Policy governs the access confined processes have to these files.
75 SELinux readahead policy is very flexible allowing users to setup their
76 readahead processes in as secure a method as possible.
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78 STANDARD FILE CONTEXT
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80 SELinux defines the file context types for the readahead, if you wanted
81 to store files with these types in a diffent paths, you need to execute
82 the semanage command to sepecify alternate labeling and then use re‐
83 storecon to put the labels on disk.
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85 semanage fcontext -a -t readahead_var_run_t '/srv/myreadahead_con‐
86 tent(/.*)?'
87 restorecon -R -v /srv/myreadahead_content
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89 Note: SELinux often uses regular expressions to specify labels that
90 match multiple files.
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92 The following file types are defined for readahead:
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96 readahead_exec_t
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98 - Set files with the readahead_exec_t type, if you want to transition
99 an executable to the readahead_t domain.
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102 Paths:
103 /sbin/readahead.*, /usr/sbin/readahead.*, /usr/lib/systemd/sys‐
104 temd-readahead.*
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107 readahead_var_lib_t
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109 - Set files with the readahead_var_lib_t type, if you want to store the
110 readahead files under the /var/lib directory.
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114 readahead_var_run_t
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116 - Set files with the readahead_var_run_t type, if you want to store the
117 readahead files under the /run or /var/run directory.
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120 Paths:
121 /var/run/readahead.*, /dev/.systemd/readahead(/.*)?, /var/run/sys‐
122 temd/readahead(/.*)?
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125 Note: File context can be temporarily modified with the chcon command.
126 If you want to permanently change the file context you need to use the
127 semanage fcontext command. This will modify the SELinux labeling data‐
128 base. You will need to use restorecon to apply the labels.
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132 semanage fcontext can also be used to manipulate default file context
133 mappings.
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135 semanage permissive can also be used to manipulate whether or not a
136 process type is permissive.
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138 semanage module can also be used to enable/disable/install/remove pol‐
139 icy modules.
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141 semanage boolean can also be used to manipulate the booleans
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144 system-config-selinux is a GUI tool available to customize SELinux pol‐
145 icy settings.
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149 This manual page was auto-generated using sepolicy manpage .
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153 selinux(8), readahead(8), semanage(8), restorecon(8), chcon(1), sepol‐
154 icy(8), setsebool(8)
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158readahead 21-06-09 readahead_selinux(8)