device/udev_linux/udev_loader.h

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef DEVICE_UDEV_LINUX_UDEV_LOADER_H_
   6 #define DEVICE_UDEV_LINUX_UDEV_LOADER_H_
   7
   8 #include <stdarg.h>
   9 #include <sys/types.h>
  10 #include <sys/stat.h>
  11
  12 #if !defined(USE_UDEV)
  13 #error "USE_UDEV not defined"
  14 #endif
  15
  16 struct udev;
  17 struct udev_device;
  18 struct udev_enumerate;
  19 struct udev_list_entry;
  20 struct udev_monitor;
  21
  22 namespace device {
  23
  24 // Interface to libudev. Accessed through the static Get() function, which
  25 // will try to load libudev1 first and then libudev0 on first use. If neither
  26 // libraries load successfully, the program will fail with a crash.
  27 //
  28 // All the methods have the same signatures as libudev's functions. e.g.
  29 // udev_monitor_get_fd(mon) simply becomes device::udev_monitor_get_fd(mon).
  30 class UdevLoader {
  31  public:
  32   static UdevLoader* Get();
  33
  34   virtual ~UdevLoader();
  35
  36   virtual bool Init() = 0;
  37
  38   virtual const char* udev_device_get_action(udev_device* udev_device) = 0;
  39   virtual const char* udev_device_get_devnode(udev_device* udev_device) = 0;
  40   virtual udev_device* udev_device_get_parent(udev_device* udev_device) = 0;
  41   virtual udev_device* udev_device_get_parent_with_subsystem_devtype(
  42       udev_device* udev_device,
  43       const char* subsystem,
  44       const char* devtype) = 0;
  45   virtual const char* udev_device_get_property_value(udev_device* udev_device,
  46                                                      const char* key) = 0;
  47   virtual const char* udev_device_get_subsystem(udev_device* udev_device) = 0;
  48   virtual const char* udev_device_get_sysattr_value(udev_device* udev_device,
  49                                                     const char* sysattr) = 0;
  50   virtual const char* udev_device_get_sysname(udev_device* udev_device) = 0;
  51   virtual const char* udev_device_get_syspath(udev_device* udev_device) = 0;
  52   virtual udev_device* udev_device_new_from_devnum(udev* udev,
  53                                                    char type,
  54                                                    dev_t devnum) = 0;
  55   virtual udev_device* udev_device_new_from_syspath(udev* udev,
  56                                                     const char* syspath) = 0;
  57   virtual void udev_device_unref(udev_device* udev_device) = 0;
  58   virtual int udev_enumerate_add_match_subsystem(udev_enumerate* udev_enumerate,
  59                                                  const char* subsystem) = 0;
  60   virtual udev_list_entry* udev_enumerate_get_list_entry(
  61       udev_enumerate* udev_enumerate) = 0;
  62   virtual udev_enumerate* udev_enumerate_new(udev* udev) = 0;
  63   virtual int udev_enumerate_scan_devices(udev_enumerate* udev_enumerate) = 0;
  64   virtual void udev_enumerate_unref(udev_enumerate* udev_enumerate) = 0;
  65   virtual udev_list_entry* udev_list_entry_get_next(
  66       udev_list_entry* list_entry) = 0;
  67   virtual const char* udev_list_entry_get_name(udev_list_entry* list_entry) = 0;
  68   virtual int udev_monitor_enable_receiving(udev_monitor* udev_monitor) = 0;
  69   virtual int udev_monitor_filter_add_match_subsystem_devtype(
  70       udev_monitor* udev_monitor,
  71       const char* subsystem,
  72       const char* devtype) = 0;
  73   virtual int udev_monitor_get_fd(udev_monitor* udev_monitor) = 0;
  74   virtual udev_monitor* udev_monitor_new_from_netlink(udev* udev,
  75                                                       const char* name) = 0;
  76   virtual udev_device* udev_monitor_receive_device(
  77       udev_monitor* udev_monitor) = 0;
  78   virtual void udev_monitor_unref(udev_monitor* udev_monitor) = 0;
  79   virtual udev* udev_new() = 0;
  80   virtual void udev_set_log_fn(
  81       struct udev* udev,
  82       void (*log_fn)(struct udev* udev, int priority,
  83                      const char* file, int line,
  84                      const char* fn, const char* format, va_list args)) = 0;
  85   virtual void udev_set_log_priority(struct udev* udev, int priority) = 0;
  86   virtual void udev_unref(udev* udev) = 0;
  87 };
  88
  89 }  // namespace device
  90
  91 #endif  // DEVICE_UDEV_LINUX_UDEV_LOADER_H_