semanage-fcontext

Section: (8)
Updated: 20130617
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NAME

semanage-fcontext - SELinux Policy Management file context tool

SYNOPSIS

DESCRIPTION

semanage is used to configure certain elements of SELinux policy without requiring modification to or recompilation from policy sources. semanage fcontext is used to manage the default file system labeling on an SELinux system. This command maps file paths using regular expressions to SELinux labels.

FILE_SPEC may contain either a fully qualified path, or a Perl compatible regular expression (PCRE), describing fully qualified path(s). The only PCRE flag in use is PCRE2_DOTALL, which causes a wildcard '.' to match anything, including a new line. Strings representing paths are processed as bytes (as opposed to Unicode), meaning that non-ASCII characters are not matched by a single wildcard.

Note, that file context definitions specified using 'semanage fcontext' (i.e. local file context modifications stored in file_contexts.local) have higher priority than those specified in policy modules. This means that whenever a match for given file path is found in file_contexts.local, no other file context definitions are considered. Entries in file_contexts.local are processed from most recent one to the oldest, with first match being used (as opposed to the most specific match, which is used when matching other file context definitions). All regular expressions should therefore be as specific as possible, to avoid unintentionally impacting other parts of the filesystem.

OPTIONS

-h, --help: show this help message and exit
-n, --noheading: Do not print heading when listing the specified object type
-N, --noreload: Do not reload policy after commit
-C, --locallist: List local customizations
-S STORE, --store STORE: Select an alternate SELinux Policy Store to manage
-a, --add: Add a record of the specified object type
-d, --delete: Delete a record of the specified object type
-m, --modify: Modify a record of the specified object type
-l, --list: List records of the specified object type
-E, --extract: Extract customizable commands, for use within a transaction
-D, --deleteall: Remove all local customizations
-e EQUAL, --equal EQUAL: Substitute target path with sourcepath when generating default label. This is used with fcontext. Requires source and target path arguments. The context labeling for the target subtree is made equivalent to that defined for the source.
-f [{a,f,d,c,b,s,l,p}], --ftype [{a,f,d,c,b,s,l,p}]: File Type. This is used with fcontext. Requires a file type as shown in the mode field by ls, e.g. use 'd' to match only directories or 'f' to match only regular files. The following file type options can be passed: f (regular file),d (directory),c (character device), b (block device),s (socket),l (symbolic link),p (named pipe). If you do not specify a file type, the file type will default to "all files".
-s SEUSER, --seuser SEUSER: SELinux user name
-t TYPE, --type TYPE: SELinux Type for the object
-r RANGE, --range RANGE: MLS/MCS Security Range (MLS/MCS Systems only) SELinux Range for SELinux login mapping defaults to the SELinux user record range. SELinux Range for SELinux user defaults to s0.

EXAMPLE

remember to run restorecon after you set the file context
Add file-context for everything under /web
# semanage fcontext -a -t httpd_sys_content_t "/web(/.*)?"
# restorecon -R -v /web

Substitute /home1 with /home when setting file context
# semanage fcontext -a -e /home /home1
# restorecon -R -v /home1

For home directories under top level directory, for example /disk6/home,
execute the following commands.
# semanage fcontext -a -t home_root_t "/disk6"
# semanage fcontext -a -e /home /disk6/home
# restorecon -R -v /disk6

AUTHOR

This man page was written by Daniel Walsh <dwalsh@redhat.com>