src/core/path.h

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