1readahead_selinux(8) SELinux Policy readahead readahead_selinux(8)
2
6 readahead_selinux - Security Enhanced Linux Policy for the readahead
7 processes
8
10 Security-Enhanced Linux secures the readahead processes via flexible
11 mandatory access control.
12 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.
16 For example:
18 ps -eZ | grep readahead_t
20
24 The readahead_t SELinux type can be entered via the readahead_exec_t
25 file type.
26 The default entrypoint paths for the readahead_t domain are the follow‐
28 ing:
29 /sbin/readahead.*, /usr/sbin/readahead.*, /usr/lib/systemd/systemd-
31 readahead.*
32
34 SELinux defines process types (domains) for each process running on the
35 system
36 You can see the context of a process using the -Z option to ps
38 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.
42 The following process types are defined for readahead:
44 readahead_t
46 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.
51
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.
58 If you want to allow all domains to execute in fips_mode, you must turn
62 on the fips_mode boolean. Enabled by default.
63 setsebool -P fips_mode 1
65
69 The SELinux process type readahead_t can manage files labeled with the
70 following file types. The paths listed are the default paths for these
71 file types. Note the processes UID still need to have DAC permissions.
72 etc_runtime_t
74 /[^/]+
76 /etc/mtab.*
77 /etc/blkid(/.*)?
78 /etc/nologin.*
79 /etc/.fstab.hal..+
80 /halt
81 /fastboot
82 /poweroff
83 /.autofsck
84 /etc/cmtab
85 /forcefsck
86 /.suspended
87 /fsckoptions
88 /.autorelabel
89 /etc/.updated
90 /var/.updated
91 /etc/killpower
92 /etc/nohotplug
93 /etc/securetty
94 /etc/ioctl.save
95 /etc/fstab.REVOKE
96 /etc/network/ifstate
97 /etc/sysconfig/hwconf
98 /etc/ptal/ptal-printd-like
99 /etc/sysconfig/iptables.save
100 /etc/xorg.conf.d/00-system-setup-keyboard.conf
101 /etc/X11/xorg.conf.d/00-system-setup-keyboard.conf
102 readahead_var_lib_t
104 /var/lib/readahead(/.*)?
106 readahead_var_run_t
108 /var/run/readahead.*
110 /dev/.systemd/readahead(/.*)?
111 /var/run/systemd/readahead(/.*)?
112 sysfs_t
114 /sys(/.*)?
116
119 SELinux requires files to have an extended attribute to define the file
120 type.
121 You can see the context of a file using the -Z option to ls
123 Policy governs the access confined processes have to these files.
125 SELinux readahead policy is very flexible allowing users to setup their
126 readahead processes in as secure a method as possible.
127 STANDARD FILE CONTEXT
129 SELinux defines the file context types for the readahead, if you wanted
131 to store files with these types in a diffent paths, you need to execute
132 the semanage command to sepecify alternate labeling and then use
133 restorecon to put the labels on disk.
134 semanage fcontext -a -t readahead_var_run_t '/srv/myreadahead_con‐
136 tent(/.*)?'
137 restorecon -R -v /srv/myreadahead_content
138 Note: SELinux often uses regular expressions to specify labels that
140 match multiple files.
141 The following file types are defined for readahead:
143 readahead_exec_t
147 - Set files with the readahead_exec_t type, if you want to transition
149 an executable to the readahead_t domain.
150 Paths:
153 /sbin/readahead.*, /usr/sbin/readahead.*, /usr/lib/systemd/sys‐
154 temd-readahead.*
155 readahead_var_lib_t
158 - Set files with the readahead_var_lib_t type, if you want to store the
160 readahead files under the /var/lib directory.
161 readahead_var_run_t
165 - Set files with the readahead_var_run_t type, if you want to store the
167 readahead files under the /run or /var/run directory.
168 Paths:
171 /var/run/readahead.*, /dev/.systemd/readahead(/.*)?, /var/run/sys‐
172 temd/readahead(/.*)?
173 Note: File context can be temporarily modified with the chcon command.
176 If you want to permanently change the file context you need to use the
177 semanage fcontext command. This will modify the SELinux labeling data‐
178 base. You will need to use restorecon to apply the labels.
179
182 semanage fcontext can also be used to manipulate default file context
183 mappings.
184 semanage permissive can also be used to manipulate whether or not a
186 process type is permissive.
187 semanage module can also be used to enable/disable/install/remove pol‐
189 icy modules.
190 semanage boolean can also be used to manipulate the booleans
192 system-config-selinux is a GUI tool available to customize SELinux pol‐
195 icy settings.
196
199 This manual page was auto-generated using sepolicy manpage .
200
203 selinux(8), readahead(8), semanage(8), restorecon(8), chcon(1), sepol‐
204 icy(8), setsebool(8)
205readahead 19-05-30 readahead_selinux(8)