src/core/path.h

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2 #pragma once
   3
   4 /***
   5   This file is part of systemd.
   6
   7   Copyright 2010 Lennart Poettering
   8 ***/
   9
  10 typedef struct Path Path;
  11 typedef struct PathSpec PathSpec;
  12
  13 #include "unit.h"
  14
  15 typedef enum PathType {
  16         PATH_EXISTS,
  17         PATH_EXISTS_GLOB,
  18         PATH_DIRECTORY_NOT_EMPTY,
  19         PATH_CHANGED,
  20         PATH_MODIFIED,
  21         _PATH_TYPE_MAX,
  22         _PATH_TYPE_INVALID = -1
  23 } PathType;
  24
  25 typedef struct PathSpec {
  26         Unit *unit;
  27
  28         char *path;
  29
  30         sd_event_source *event_source;
  31
  32         LIST_FIELDS(struct PathSpec, spec);
  33
  34         PathType type;
  35         int inotify_fd;
  36         int primary_wd;
  37
  38         bool previous_exists;
  39 } PathSpec;
  40
  41 int path_spec_watch(PathSpec *s, sd_event_io_handler_t handler);
  42 void path_spec_unwatch(PathSpec *s);
  43 int path_spec_fd_event(PathSpec *s, uint32_t events);
  44 void path_spec_done(PathSpec *s);
  45
  46 static inline bool path_spec_owns_inotify_fd(PathSpec *s, int fd) {
  47         return s->inotify_fd == fd;
  48 }
  49
  50 typedef enum PathResult {
  51         PATH_SUCCESS,
  52         PATH_FAILURE_RESOURCES,
  53         PATH_FAILURE_START_LIMIT_HIT,
  54         _PATH_RESULT_MAX,
  55         _PATH_RESULT_INVALID = -1
  56 } PathResult;
  57
  58 struct Path {
  59         Unit meta;
  60
  61         LIST_HEAD(PathSpec, specs);
  62
  63         PathState state, deserialized_state;
  64
  65         bool inotify_triggered;
  66
  67         bool make_directory;
  68         mode_t directory_mode;
  69
  70         PathResult result;
  71 };
  72
  73 void path_free_specs(Path *p);
  74
  75 extern const UnitVTable path_vtable;
  76
  77 const char* path_type_to_string(PathType i) _const_;
  78 PathType path_type_from_string(const char *s) _pure_;
  79
  80 const char* path_result_to_string(PathResult i) _const_;
  81 PathResult path_result_from_string(const char *s) _pure_;