systemd.path - Path unit configuration




   A unit configuration file whose name ends in ".path" encodes
   information about a path monitored by systemd, for path-based

   This man page lists the configuration options specific to this unit
   type. See systemd.unit(5) for the common options of all unit
   configuration files. The common configuration items are configured in
   the generic [Unit] and [Install] sections. The path specific
   configuration options are configured in the [Path] section.

   For each path file, a matching unit file must exist, describing the
   unit to activate when the path changes. By default, a service by the
   same name as the path (except for the suffix) is activated. Example: a
   path file foo.path activates a matching service foo.service. The unit
   to activate may be controlled by Unit= (see below).

   Internally, path units use the inotify(7) API to monitor file systems.
   Due to that, it suffers by the same limitations as inotify, and for
   example cannot be used to monitor files or directories changed by other
   machines on remote NFS file systems.


   If a path unit is beneath another mount unit in the file system
   hierarchy, both a requirement and an ordering dependency between both
   units are created automatically.

   An implicit Before= dependency is added between a path unit and the
   unit it is supposed to activate.

   Unless DefaultDependencies=false in the "[Unit]" section is used, path
   units will implicitly have dependencies of type Before= on, dependencies of type After= and Requires= on, and have dependencies of type Conflicts= and Before= on These ensure that path units are terminated cleanly
   prior to system shutdown. Only path units involved with early boot or
   late system shutdown should disable this option.


   Path files must include a [Path] section, which carries information
   about the path(s) it monitors. The options specific to the [Path]
   section of path units are the following:

   PathExists=, PathExistsGlob=, PathChanged=, PathModified=,
       Defines paths to monitor for certain changes: PathExists= may be
       used to watch the mere existence of a file or directory. If the
       file specified exists, the configured unit is activated.
       PathExistsGlob= works similar, but checks for the existence of at
       least one file matching the globbing pattern specified.
       PathChanged= may be used to watch a file or directory and activate
       the configured unit whenever it changes. It is not activated on
       every write to the watched file but it is activated if the file
       which was open for writing gets closed.  PathModified= is similar,
       but additionally it is activated also on simple writes to the
       watched file.  DirectoryNotEmpty= may be used to watch a directory
       and activate the configured unit whenever it contains at least one

       The arguments of these directives must be absolute file system

       Multiple directives may be combined, of the same and of different
       types, to watch multiple paths. If the empty string is assigned to
       any of these options, the list of paths to watch is reset, and any
       prior assignments of these options will not have any effect.

       If a path already exists (in case of PathExists= and
       PathExistsGlob=) or a directory already is not empty (in case of
       DirectoryNotEmpty=) at the time the path unit is activated, then
       the configured unit is immediately activated as well. Something
       similar does not apply to PathChanged= and PathModified=.

       If the path itself or any of the containing directories are not
       accessible, systemd will watch for permission changes and notice
       that conditions are satisfied when permissions allow that.

       The unit to activate when any of the configured paths changes. The
       argument is a unit name, whose suffix is not ".path". If not
       specified, this value defaults to a service that has the same name
       as the path unit, except for the suffix. (See above.) It is
       recommended that the unit name that is activated and the unit name
       of the path unit are named identical, except for the suffix.

       Takes a boolean argument. If true, the directories to watch are
       created before watching. This option is ignored for PathExists=
       settings. Defaults to false.

       If MakeDirectory= is enabled, use the mode specified here to create
       the directories in question. Takes an access mode in octal
       notation. Defaults to 0755.


   systemd(1), systemctl(1), systemd.unit(5), systemd.service(5),
   inotify(7), systemd.directives(7)


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