src/core/path.h

   1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
   2
   3 #ifndef foopathhfoo
   4 #define foopathhfoo
   5
   6 /***
   7   This file is part of systemd.
   8
   9   Copyright 2010 Lennart Poettering
  10
  11   systemd is free software; you can redistribute it and/or modify it
  12   under the terms of the GNU General Public License as published by
  13   the Free Software Foundation; either version 2 of the License, or
  14   (at your option) any later version.
  15
  16   systemd is distributed in the hope that it will be useful, but
  17   WITHOUT ANY WARRANTY; without even the implied warranty of
  18   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  19   General Public License for more details.
  20
  21   You should have received a copy of the GNU General Public License
  22   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  23 ***/
  24
  25 typedef struct Path Path;
  26
  27 #include "unit.h"
  28 #include "mount.h"
  29
  30 typedef enum PathState {
  31         PATH_DEAD,
  32         PATH_WAITING,
  33         PATH_RUNNING,
  34         PATH_FAILED,
  35         _PATH_STATE_MAX,
  36         _PATH_STATE_INVALID = -1
  37 } PathState;
  38
  39 typedef enum PathType {
  40         PATH_EXISTS,
  41         PATH_EXISTS_GLOB,
  42         PATH_DIRECTORY_NOT_EMPTY,
  43         PATH_CHANGED,
  44         PATH_MODIFIED,
  45         _PATH_TYPE_MAX,
  46         _PATH_TYPE_INVALID = -1
  47 } PathType;
  48
  49 typedef struct PathSpec {
  50         char *path;
  51
  52         Watch watch;
  53
  54         LIST_FIELDS(struct PathSpec, spec);
  55
  56         PathType type;
  57         int inotify_fd;
  58         int primary_wd;
  59
  60         bool previous_exists;
  61 } PathSpec;
  62
  63 int path_spec_watch(PathSpec *s, Unit *u);
  64 void path_spec_unwatch(PathSpec *s, Unit *u);
  65 int path_spec_fd_event(PathSpec *s, uint32_t events);
  66 void path_spec_done(PathSpec *s);
  67
  68 static inline bool path_spec_owns_inotify_fd(PathSpec *s, int fd) {
  69         return s->inotify_fd == fd;
  70 }
  71
  72 typedef enum PathResult {
  73         PATH_SUCCESS,
  74         PATH_FAILURE_RESOURCES,
  75         _PATH_RESULT_MAX,
  76         _PATH_RESULT_INVALID = -1
  77 } PathResult;
  78
  79 struct Path {
  80         Unit meta;
  81
  82         LIST_HEAD(PathSpec, specs);
  83
  84         UnitRef unit;
  85
  86         PathState state, deserialized_state;
  87
  88         bool inotify_triggered;
  89
  90         bool make_directory;
  91         mode_t directory_mode;
  92
  93         PathResult result;
  94 };
  95
  96 void path_unit_notify(Unit *u, UnitActiveState new_state);
  97
  98 /* Called from the mount code figure out if a mount is a dependency of
  99  * any of the paths of this path object */
 100 int path_add_one_mount_link(Path *p, Mount *m);
 101
 102 extern const UnitVTable path_vtable;
 103
 104 const char* path_state_to_string(PathState i);
 105 PathState path_state_from_string(const char *s);
 106
 107 const char* path_type_to_string(PathType i);
 108 PathType path_type_from_string(const char *s);
 109
 110 const char* path_result_to_string(PathResult i);
 111 PathResult path_result_from_string(const char *s);
 112
 113 #endif