udev.h 4.2 KB

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  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. #ifndef DEVICE_UDEV_LINUX_UDEV_H_
  5. #define DEVICE_UDEV_LINUX_UDEV_H_
  6. #include <stdarg.h>
  7. #include <sys/types.h>
  8. #include <sys/stat.h>
  9. #include <string>
  10. #if !defined(USE_UDEV)
  11. #error "USE_UDEV not defined"
  12. #endif
  13. // Adapted from libudev.h.
  14. #define udev_list_entry_foreach(list_entry, first_entry) \
  15. for (list_entry = first_entry; list_entry != NULL; \
  16. list_entry = ::device::udev_list_entry_get_next(list_entry))
  17. // Forward declarations of opaque structs.
  18. struct udev;
  19. struct udev_device;
  20. struct udev_enumerate;
  21. struct udev_list_entry;
  22. struct udev_monitor;
  23. namespace device {
  24. const char* udev_device_get_action(udev_device* udev_device);
  25. const char* udev_device_get_devnode(udev_device* udev_device);
  26. const char* udev_device_get_devtype(udev_device* udev_device);
  27. udev_device* udev_device_get_parent(udev_device* udev_device);
  28. udev_device* udev_device_get_parent_with_subsystem_devtype(
  29. udev_device* udev_device,
  30. const char* subsystem,
  31. const char* devtype);
  32. udev_list_entry* udev_device_get_properties_list_entry(
  33. struct udev_device* udev_device);
  34. const char* udev_device_get_property_value(udev_device* udev_device,
  35. const char* key);
  36. const char* udev_device_get_subsystem(udev_device* udev_device);
  37. const char* udev_device_get_sysattr_value(udev_device* udev_device,
  38. const char* sysattr);
  39. const char* udev_device_get_sysname(udev_device* udev_device);
  40. const char* udev_device_get_syspath(udev_device* udev_device);
  41. udev_device* udev_device_new_from_devnum(udev* udev, char type, dev_t devnum);
  42. udev_device* udev_device_new_from_subsystem_sysname(
  43. udev* udev,
  44. const char* subsystem,
  45. const char* sysname);
  46. udev_device* udev_device_new_from_syspath(udev* udev, const char* syspath);
  47. void udev_device_unref(udev_device* udev_device);
  48. int udev_enumerate_add_match_subsystem(udev_enumerate* udev_enumerate,
  49. const char* subsystem);
  50. udev_list_entry* udev_enumerate_get_list_entry(udev_enumerate* udev_enumerate);
  51. udev_enumerate* udev_enumerate_new(udev* udev);
  52. int udev_enumerate_scan_devices(udev_enumerate* udev_enumerate);
  53. void udev_enumerate_unref(udev_enumerate* udev_enumerate);
  54. udev_list_entry* udev_list_entry_get_next(udev_list_entry* list_entry);
  55. const char* udev_list_entry_get_name(udev_list_entry* list_entry);
  56. int udev_monitor_enable_receiving(udev_monitor* udev_monitor);
  57. int udev_monitor_filter_add_match_subsystem_devtype(udev_monitor* udev_monitor,
  58. const char* subsystem,
  59. const char* devtype);
  60. int udev_monitor_get_fd(udev_monitor* udev_monitor);
  61. udev_monitor* udev_monitor_new_from_netlink(udev* udev, const char* name);
  62. udev_device* udev_monitor_receive_device(udev_monitor* udev_monitor);
  63. void udev_monitor_unref(udev_monitor* udev_monitor);
  64. udev* udev_new();
  65. void udev_set_log_fn(
  66. struct udev* udev,
  67. void (*log_fn)(struct udev* udev, int priority, const char* file, int line,
  68. const char* fn, const char* format, va_list args));
  69. void udev_set_log_priority(struct udev* udev, int priority);
  70. void udev_unref(udev* udev);
  71. // Calls udev_device_get_property_value() and replaces missing values with
  72. // the empty string.
  73. std::string UdevDeviceGetPropertyValue(udev_device* udev_device,
  74. const char* key);
  75. // Calls udev_device_get_sysattr_value() and replaces missing values with
  76. // the empty string.
  77. std::string UdevDeviceGetSysattrValue(udev_device* udev_device,
  78. const char* key);
  79. // Walks up the chain of parent devices calling udev_device_get_sysattr_value()
  80. // until a value is found. If no value is found, an empty string is returned.
  81. std::string UdevDeviceRecursiveGetSysattrValue(udev_device* udev_device,
  82. const char* key);
  83. // Decodes udev-encoded string. Useful for decoding "*_ENC" udev properties.
  84. std::string UdevDecodeString(const std::string& encoded);
  85. } // namespace device
  86. #endif // DEVICE_UDEV_LINUX_UDEV_H_