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libudev: add comments to libudev.h

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This commit is contained in:
Kay Sievers 2009-06-08 19:31:07 +02:00
parent 67dd1cdf9d
commit 15a45c89e5
1 changed files with 54 additions and 18 deletions
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72
udev/lib/libudev.h
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@ -21,11 +21,16 @@
#error "#define LIBUDEV_I_KNOW_THE_API_IS_SUBJECT_TO_CHANGE is needed to use this experimental library version"
#endif
/* library context */
/*
* udev - library context
*
* reads the udev config and system environment
* allows custom logging
*/
struct udev;
struct udev *udev_new(void);
struct udev *udev_ref(struct udev *udev);
void udev_unref(struct udev *udev);
struct udev *udev_new(void);
void udev_set_log_fn(struct udev *udev,
void (*log_fn)(struct udev *udev,
int priority, const char *file, int line, const char *fn,
@ -37,7 +42,11 @@ const char *udev_get_dev_path(struct udev *udev);
void *udev_get_userdata(struct udev *udev);
void udev_set_userdata(struct udev *udev, void *userdata);
/* list iteration */
/*
* udev_list
*
* access to libudev generated lists
*/
struct udev_list_entry;
struct udev_list_entry *udev_list_entry_get_next(struct udev_list_entry *list_entry);
struct udev_list_entry *udev_list_entry_get_by_name(struct udev_list_entry *list_entry, const char *name);
@ -48,16 +57,23 @@ const char *udev_list_entry_get_value(struct udev_list_entry *list_entry);
entry != NULL; \
entry = udev_list_entry_get_next(entry))
/* sys devices */
/*
* udev_device
*
* access to sysfs/kernel devices
*/
struct udev_device;
struct udev_device *udev_device_new_from_syspath(struct udev *udev, const char *syspath);
struct udev_device *udev_device_new_from_devnum(struct udev *udev, char type, dev_t devnum);
struct udev_device *udev_device_new_from_subsystem_sysname(struct udev *udev, const char *subsystem, const char *sysname);
struct udev_device *udev_device_get_parent(struct udev_device *udev_device);
struct udev_device *udev_device_get_parent_with_subsystem_devtype(struct udev_device *udev_device, const char *subsystem, const char *devtype);
struct udev_device *udev_device_ref(struct udev_device *udev_device);
void udev_device_unref(struct udev_device *udev_device);
struct udev *udev_device_get_udev(struct udev_device *udev_device);
struct udev_device *udev_device_new_from_syspath(struct udev *udev, const char *syspath);
struct udev_device *udev_device_new_from_devnum(struct udev *udev, char type, dev_t devnum);
struct udev_device *udev_device_new_from_subsystem_sysname(struct udev *udev, const char *subsystem, const char *sysname);
/* udev_device_get_parent_*() does not take a reference on the returned device, it is automatically unref'd with the parent */
struct udev_device *udev_device_get_parent(struct udev_device *udev_device);
struct udev_device *udev_device_get_parent_with_subsystem_devtype(struct udev_device *udev_device,
const char *subsystem, const char *devtype);
/* retrieve device properties */
const char *udev_device_get_devpath(struct udev_device *udev_device);
const char *udev_device_get_subsystem(struct udev_device *udev_device);
const char *udev_device_get_devtype(struct udev_device *udev_device);
@ -74,42 +90,62 @@ const char *udev_device_get_action(struct udev_device *udev_device);
unsigned long long int udev_device_get_seqnum(struct udev_device *udev_device);
const char *udev_device_get_sysattr_value(struct udev_device *udev_device, const char *sysattr);
/* device events */
/*
* udev_monitor
*
* access to kernel uevents and udev events
*/
struct udev_monitor;
struct udev_monitor *udev_monitor_new_from_netlink(struct udev *udev, const char *name);
struct udev_monitor *udev_monitor_new_from_socket(struct udev *udev, const char *socket_path);
int udev_monitor_enable_receiving(struct udev_monitor *udev_monitor);
struct udev_monitor *udev_monitor_ref(struct udev_monitor *udev_monitor);
void udev_monitor_unref(struct udev_monitor *udev_monitor);
struct udev *udev_monitor_get_udev(struct udev_monitor *udev_monitor);
/* kernel and udev generated events over netlink */
struct udev_monitor *udev_monitor_new_from_netlink(struct udev *udev, const char *name);
/* custom socket (use netlink and filters instead) */
struct udev_monitor *udev_monitor_new_from_socket(struct udev *udev, const char *socket_path);
/* bind socket */
int udev_monitor_enable_receiving(struct udev_monitor *udev_monitor);
int udev_monitor_get_fd(struct udev_monitor *udev_monitor);
struct udev_device *udev_monitor_receive_device(struct udev_monitor *udev_monitor);
int udev_monitor_filter_add_match_subsystem_devtype(struct udev_monitor *udev_monitor, const char *subsystem, const char *devtype);
/* in-kernel socket filters to select messages that get delivered to a listener */
int udev_monitor_filter_add_match_subsystem_devtype(struct udev_monitor *udev_monitor,
const char *subsystem, const char *devtype);
int udev_monitor_filter_update(struct udev_monitor *udev_monitor);
int udev_monitor_filter_remove(struct udev_monitor *udev_monitor);
/* sys enumeration */
/*
* udev_enumerate
*
* search sysfs for specific devices and provide a sorted list
*/
struct udev_enumerate;
struct udev_enumerate *udev_enumerate_new(struct udev *udev);
struct udev_enumerate *udev_enumerate_ref(struct udev_enumerate *udev_enumerate);
void udev_enumerate_unref(struct udev_enumerate *udev_enumerate);
struct udev *udev_enumerate_get_udev(struct udev_enumerate *udev_enumerate);
struct udev_enumerate *udev_enumerate_new(struct udev *udev);
/* device properties filter */
int udev_enumerate_add_match_subsystem(struct udev_enumerate *udev_enumerate, const char *subsystem);
int udev_enumerate_add_nomatch_subsystem(struct udev_enumerate *udev_enumerate, const char *subsystem);
int udev_enumerate_add_match_sysattr(struct udev_enumerate *udev_enumerate, const char *sysattr, const char *value);
int udev_enumerate_add_nomatch_sysattr(struct udev_enumerate *udev_enumerate, const char *sysattr, const char *value);
int udev_enumerate_add_match_property(struct udev_enumerate *udev_enumerate, const char *property, const char *value);
int udev_enumerate_add_syspath(struct udev_enumerate *udev_enumerate, const char *syspath);
/* run enumeration with active filters */
int udev_enumerate_scan_devices(struct udev_enumerate *udev_enumerate);
int udev_enumerate_scan_subsystems(struct udev_enumerate *udev_enumerate);
/* return device list */
struct udev_list_entry *udev_enumerate_get_list_entry(struct udev_enumerate *udev_enumerate);
/* event queue */
/*
* udev_queue
*
* access to the currently running udev events
*/
struct udev_queue;
struct udev_queue *udev_queue_new(struct udev *udev);
struct udev_queue *udev_queue_ref(struct udev_queue *udev_queue);
void udev_queue_unref(struct udev_queue *udev_queue);
struct udev *udev_queue_get_udev(struct udev_queue *udev_queue);
struct udev_queue *udev_queue_new(struct udev *udev);
unsigned long long int udev_queue_get_kernel_seqnum(struct udev_queue *udev_queue);
unsigned long long int udev_queue_get_udev_seqnum(struct udev_queue *udev_queue);
int udev_queue_get_udev_is_active(struct udev_queue *udev_queue);