TMPFILES.D(5)							    tmpfiles.d							     TMPFILES.D(5)

NAME

       tmpfiles.d - Configuration for creation, deletion and cleaning of volatile and temporary files

SYNOPSIS

       /etc/tmpfiles.d/*.conf

       /run/tmpfiles.d/*.conf

       /usr/lib/tmpfiles.d/*.conf

DESCRIPTION

       systemd-tmpfiles uses the configuration files from the above directories to describe the creation, cleaning and removal of volatile and
       temporary files and directories which usually reside in directories such as /run or /tmp.

CONFIGURATION FORMAT

       Each configuration file is named in the style of <program>.conf. Files in /etc/ override files with the same name in /usr/lib/. Files in
       /run override files with the same name in /etc/ and /usr/lib/. Packages should install their configuration files in /usr/lib/, files in
       /etc/ are reserved for the local administrator, who may choose to override the configurations installed from packages. The list of
       configuration files are sorted by their filename in alphabetical order, regardless in which of the directories they reside, to guarantee
       that a configuration file takes precedence over another configuration file with an alphabetically later name.

       The configuration format is one line per path containing action, path, mode, ownership, age and argument fields:

	   Type Path	    Mode UID  GID  Age Argument
	   d	/run/user   0755 root root 10d -
	   L	/tmp/foobar -	 -    -    -   /dev/null

   Type
       f
	   Create a file if it doesn't exist yet (optionally writing a short string into it, if the argument parameter is passed)

       F
	   Create or truncate a file (optionally writing a short string into it, if the argument parameter is passed)

       w
	   Write the argument parameter to a file, if it exists.

       d
	   Create a directory if it doesn't exist yet

       D
	   Create or empty a directory

       p
	   Create a named pipe (FIFO) if it doesn't exist yet

       L
	   Create a symlink if it doesn't exist yet

       c
	   Create a character device node if it doesn't exist yet

       b
	   Create a block device node if it doesn't exist yet

       x
	   Ignore a path during cleaning. Use this type to exclude paths from clean-up as controlled with the Age parameter. Note that lines of
	   this type do not influence the effect of r or R lines. Lines of this type accept shell-style globs in place of of normal path names.

       r
	   Remove a file or directory if it exists. This may not be used to remove non-empty directories, use R for that. Lines of this type
	   accept shell-style globs in place of normal path names.

       R
	   Recursively remove a path and all its subdirectories (if it is a directory). Lines of this type accept shell-style globs in place of
	   normal path names.

       z
	   Restore SELinux security context label and set ownership and access mode of a file or directory if it exists. Lines of this type accept
	   shell-style globs in place of normal path names.

       Z
	   Recursively restore SELinux security context label and set ownership and access mode of a path and all its subdirectories (if it is a
	   directory). Lines of this type accept shell-style globs in place of normal path names.

   Mode
       The file access mode to use when creating this file or directory. If omitted or when set to - the default is used: 0755 for directories,
       0644 for all other file objects. For z, Z lines if omitted or when set to - the file access mode will not be modified. This parameter is
       ignored for x, r, R, L lines.

   UID, GID
       The user and group to use for this file or directory. This may either be a numeric user/group ID or a user or group name. If omitted or
       when set to - the default 0 (root) is used. For z, Z lines when omitted or when set to - the file ownership will not be modified. These
       parameters are ignored for x, r, R, L lines.

   Age
       The date field, when set, is used to decide what files to delete when cleaning. If a file or directory is older than the current time minus
       the age field it is deleted. The field format is a series of integers each followed by one of the following postfixes for the respective
       time units:

       s, min, h, d, w, ms, m, us

       If multiple integers and units are specified the time values are summed up.

       The age field only applies to lines starting with d, D and x. If omitted or set to - no automatic clean-up is done.

   Argument
       For L lines determines the destination path of the symlink. For c, b determines the major/minor of the device node, with major and minor
       formatted as integers, separated by :, e.g. "1:3". For f, F, w may be used to specify a short string that is written to the file, suffixed
       by a newline. Ignored for all other lines.

EXAMPLE

       Example 1. /etc/tmpfiles.d/screen.conf example

       screen needs two directories created at boot with specific modes and ownership.

	   d /var/run/screens  1777 root root 10d
	   d /var/run/uscreens 0755 root root 10d12h

SEE ALSO

       systemd(1), systemd-tmpfiles(8)

AUTHOR

       Brandon Philips <brandon@ifup.org>
	   Documentation

systemd 							    10/07/2013							     TMPFILES.D(5)