/*************************************************************************** * CVSID: $Id$ * * libhal.h : HAL daemon C convenience library headers * * Copyright (C) 2003 David Zeuthen, * Copyright (C) 2007 Codethink Ltd. Author Rob Taylor * * Licensed under the Academic Free License version 2.1 * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA * **************************************************************************/ #ifndef LIBHAL_H #define LIBHAL_H #include #if defined(__cplusplus) extern "C" { #if 0 } /* shut up emacs indenting */ #endif #endif #if defined(__GNUC__) #define LIBHAL_DEPRECATED __attribute__ ((deprecated)) #else #define LIBHAL_DEPRECATED #endif #define LIBHAL_FREE_DBUS_ERROR(_dbus_error_) \ do { \ if (dbus_error_is_set(_dbus_error_)) \ dbus_error_free (_dbus_error_); \ else \ fprintf (stderr, \ "%s %d : INFO: called LIBHAL_FREE_DBUS_ERROR " \ "but dbusError was not set.\n", \ __FILE__, __LINE__); \ } while (0) /** * LIBHAL_CHECK_LIBHALCONTEXT: * @_ctx_: the context * @_ret_: what to use for return value if context is invalid * * Handy macro for checking whether a context is valid. */ #define LIBHAL_CHECK_LIBHALCONTEXT(_ctx_, _ret_) \ do { \ if (_ctx_ == NULL) { \ fprintf (stderr, \ "%s %d : LibHalContext *ctx is NULL\n", \ __FILE__, __LINE__); \ return _ret_; \ } \ } while(0) /** * LibHalPropertyType: * * Possible types for properties on hal device objects */ typedef enum { /** Used to report error condition */ LIBHAL_PROPERTY_TYPE_INVALID = DBUS_TYPE_INVALID, /** Type for 32-bit signed integer property */ LIBHAL_PROPERTY_TYPE_INT32 = DBUS_TYPE_INT32, /** Type for 64-bit unsigned integer property */ LIBHAL_PROPERTY_TYPE_UINT64 = DBUS_TYPE_UINT64, /** Type for double precision floating point property */ LIBHAL_PROPERTY_TYPE_DOUBLE = DBUS_TYPE_DOUBLE, /** Type for boolean property */ LIBHAL_PROPERTY_TYPE_BOOLEAN = DBUS_TYPE_BOOLEAN, /** Type for UTF-8 string property */ LIBHAL_PROPERTY_TYPE_STRING = DBUS_TYPE_STRING, /** Type for list of UTF-8 strings property */ LIBHAL_PROPERTY_TYPE_STRLIST = ((int) (DBUS_TYPE_STRING<<8)+('l')) } LibHalPropertyType; typedef struct LibHalContext_s LibHalContext; /** * LibHalIntegrateDBusIntoMainLoop: * @ctx: context for connection to hald * @dbus_connection: DBus connection to use in ctx * * Type for function in application code that integrates a * DBusConnection object into its own mainloop. */ typedef void (*LibHalIntegrateDBusIntoMainLoop) (LibHalContext *ctx, DBusConnection *dbus_connection); /** * LibHalDeviceAdded: * @ctx: context for connection to hald * @udi: the Unique Device Id * * Type for callback when a device is added. */ typedef void (*LibHalDeviceAdded) (LibHalContext *ctx, const char *udi); /** * LibHalDeviceRemoved: * @ctx: context for connection to hald * @udi: the Unique Device Id * * Type for callback when a device is removed. */ typedef void (*LibHalDeviceRemoved) (LibHalContext *ctx, const char *udi); /** * LibHalDeviceNewCapability: * @ctx: context for connection to hald * @udi: the Unique Device Id * @capability: capability of the device * * Type for callback when a device gains a new capability. * */ typedef void (*LibHalDeviceNewCapability) (LibHalContext *ctx, const char *udi, const char *capability); /** * LibHalDeviceLostCapability: * @ctx: context for connection to hald * @udi: the Unique Device Id * @capability: capability of the device * * Type for callback when a device loses a capability. * */ typedef void (*LibHalDeviceLostCapability) (LibHalContext *ctx, const char *udi, const char *capability); /** * LibHalDevicePropertyModified: * @ctx: context for connection to hald * @udi: the Unique Device Id * @key: name of the property that has changed * @is_removed: whether or not property was removed * @is_added: whether or not property was added * * Type for callback when a property of a device changes. */ typedef void (*LibHalDevicePropertyModified) (LibHalContext *ctx, const char *udi, const char *key, dbus_bool_t is_removed, dbus_bool_t is_added); /** * LibHalDeviceCondition: * @ctx: context for connection to hald * @udi: the Unique Device Id * @condition_name: name of the condition, e.g. ProcessorOverheating. Consult the HAL spec for details * @condition_detail: detail of condition * * Type for callback when a non-continuous condition occurs on a device. */ typedef void (*LibHalDeviceCondition) (LibHalContext *ctx, const char *udi, const char *condition_name, const char *condition_detail); /* Create a new context for a connection with hald */ LibHalContext *libhal_ctx_new (void); /* Enable or disable caching */ dbus_bool_t libhal_ctx_set_cache (LibHalContext *ctx, dbus_bool_t use_cache); /* Set DBus connection to use to talk to hald. */ dbus_bool_t libhal_ctx_set_dbus_connection (LibHalContext *ctx, DBusConnection *conn); /* Get DBus connection to use to talk to hald. */ DBusConnection *libhal_ctx_get_dbus_connection (LibHalContext *ctx); /* Set user data for the context */ dbus_bool_t libhal_ctx_set_user_data (LibHalContext *ctx, void *user_data); /* Get user data for the context */ void* libhal_ctx_get_user_data (LibHalContext *ctx); /* Set the callback for when a device is added */ dbus_bool_t libhal_ctx_set_device_added (LibHalContext *ctx, LibHalDeviceAdded callback); /* Set the callback for when a device is removed */ dbus_bool_t libhal_ctx_set_device_removed (LibHalContext *ctx, LibHalDeviceRemoved callback); /* Set the callback for when a device gains a new capability */ dbus_bool_t libhal_ctx_set_device_new_capability (LibHalContext *ctx, LibHalDeviceNewCapability callback); /* Set the callback for when a device loses a capability */ dbus_bool_t libhal_ctx_set_device_lost_capability (LibHalContext *ctx, LibHalDeviceLostCapability callback); /* Set the callback for when a property is modified on a device */ dbus_bool_t libhal_ctx_set_device_property_modified (LibHalContext *ctx, LibHalDevicePropertyModified callback); /* Set the callback for when a device emits a condition */ dbus_bool_t libhal_ctx_set_device_condition (LibHalContext *ctx, LibHalDeviceCondition callback); /* Initialize the connection to hald */ dbus_bool_t libhal_ctx_init (LibHalContext *ctx, DBusError *error); /* Shut down a connection to hald */ dbus_bool_t libhal_ctx_shutdown (LibHalContext *ctx, DBusError *error); /* Free a LibHalContext resource */ dbus_bool_t libhal_ctx_free (LibHalContext *ctx); /* Create an already initialized connection to hald */ LibHalContext *libhal_ctx_init_direct (DBusError *error); /* Get all devices in the Global Device List (GDL). */ char **libhal_get_all_devices (LibHalContext *ctx, int *num_devices, DBusError *error); /* Determine if a device exists. */ dbus_bool_t libhal_device_exists (LibHalContext *ctx, const char *udi, DBusError *error); /* Print a device to stdout; useful for debugging. */ dbus_bool_t libhal_device_print (LibHalContext *ctx, const char *udi, DBusError *error); /* Determine if a property on a device exists. */ dbus_bool_t libhal_device_property_exists (LibHalContext *ctx, const char *udi, const char *key, DBusError *error); /* Get the value of a property of type string. */ char *libhal_device_get_property_string (LibHalContext *ctx, const char *udi, const char *key, DBusError *error); /* Get the value of a property of type signed integer. */ dbus_int32_t libhal_device_get_property_int (LibHalContext *ctx, const char *udi, const char *key, DBusError *error); /* Get the value of a property of type unsigned integer. */ dbus_uint64_t libhal_device_get_property_uint64 (LibHalContext *ctx, const char *udi, const char *key, DBusError *error); /* Get the value of a property of type double. */ double libhal_device_get_property_double (LibHalContext *ctx, const char *udi, const char *key, DBusError *error); /* Get the value of a property of type bool. */ dbus_bool_t libhal_device_get_property_bool (LibHalContext *ctx, const char *udi, const char *key, DBusError *error); /* Get the value of a property of type string list. */ char **libhal_device_get_property_strlist (LibHalContext *ctx, const char *udi, const char *key, DBusError *error); /* Set a property of type string. */ dbus_bool_t libhal_device_set_property_string (LibHalContext *ctx, const char *udi, const char *key, const char *value, DBusError *error); /* Set a property of type signed integer. */ dbus_bool_t libhal_device_set_property_int (LibHalContext *ctx, const char *udi, const char *key, dbus_int32_t value, DBusError *error); /* Set a property of type unsigned integer. */ dbus_bool_t libhal_device_set_property_uint64 (LibHalContext *ctx, const char *udi, const char *key, dbus_uint64_t value, DBusError *error); /* Set a property of type double. */ dbus_bool_t libhal_device_set_property_double (LibHalContext *ctx, const char *udi, const char *key, double value, DBusError *error); /* Set a property of type bool. */ dbus_bool_t libhal_device_set_property_bool (LibHalContext *ctx, const char *udi, const char *key, dbus_bool_t value, DBusError *error); /* Append to a property of type strlist. */ dbus_bool_t libhal_device_property_strlist_append (LibHalContext *ctx, const char *udi, const char *key, const char *value, DBusError *error); /* Prepend to a property of type strlist. */ dbus_bool_t libhal_device_property_strlist_prepend (LibHalContext *ctx, const char *udi, const char *key, const char *value, DBusError *error); /* Remove a specified string from a property of type strlist. */ dbus_bool_t libhal_device_property_strlist_remove_index (LibHalContext *ctx, const char *udi, const char *key, unsigned int idx, DBusError *error); /* Remove a specified string from a property of type strlist. */ dbus_bool_t libhal_device_property_strlist_remove (LibHalContext *ctx, const char *udi, const char *key, const char *value, DBusError *error); /* Remove a property. */ dbus_bool_t libhal_device_remove_property (LibHalContext *ctx, const char *udi, const char *key, DBusError *error); /* Query a property type of a device. */ LibHalPropertyType libhal_device_get_property_type (LibHalContext *ctx, const char *udi, const char *key, DBusError *error); struct LibHalChangeSet_s; typedef struct LibHalChangeSet_s LibHalChangeSet; LibHalChangeSet *libhal_device_new_changeset (const char *udi); dbus_bool_t libhal_changeset_set_property_string (LibHalChangeSet *changeset, const char *key, const char *value); dbus_bool_t libhal_changeset_set_property_int (LibHalChangeSet *changeset, const char *key, dbus_int32_t value); dbus_bool_t libhal_changeset_set_property_uint64 (LibHalChangeSet *changeset, const char *key, dbus_uint64_t value); dbus_bool_t libhal_changeset_set_property_double (LibHalChangeSet *changeset, const char *key, double value); dbus_bool_t libhal_changeset_set_property_bool (LibHalChangeSet *changeset, const char *key, dbus_bool_t value); dbus_bool_t libhal_changeset_set_property_strlist (LibHalChangeSet *changeset, const char *key, const char **value); dbus_bool_t libhal_device_commit_changeset (LibHalContext *ctx, LibHalChangeSet *changeset, DBusError *error); void libhal_device_free_changeset (LibHalChangeSet *changeset); struct LibHalProperty_s; typedef struct LibHalProperty_s LibHalProperty; struct LibHalPropertySet_s; typedef struct LibHalPropertySet_s LibHalPropertySet; /* Retrieve all the properties on a device. */ LibHalPropertySet *libhal_device_get_all_properties (LibHalContext *ctx, const char *udi, DBusError *error); /* Free a property set earlier obtained with libhal_device_get_all_properties(). */ void libhal_free_property_set (LibHalPropertySet *set); /* Get the number of properties in a property set. */ unsigned int libhal_property_set_get_num_elems (LibHalPropertySet *set); /* Get type of property. */ LibHalPropertyType libhal_ps_get_type (const LibHalPropertySet *set, const char *key); /* Get the value of a property of type string. */ const char *libhal_ps_get_string (const LibHalPropertySet *set, const char *key); /* Get the value of a property of type signed integer. */ dbus_int32_t libhal_ps_get_int32 (const LibHalPropertySet *set, const char *key); /* Get the value of a property of type unsigned integer. */ dbus_uint64_t libhal_ps_get_uint64 (const LibHalPropertySet *set, const char *key); /* Get the value of a property of type double. */ double libhal_ps_get_double (const LibHalPropertySet *set, const char *key); /* Get the value of a property of type bool. */ dbus_bool_t libhal_ps_get_bool (const LibHalPropertySet *set, const char *key); /* Get the value of a property of type string list. */ const char * const *libhal_ps_get_strlist (const LibHalPropertySet *set, const char *key); /** * LibHalPropertySetIterator: * * Iterator for inspecting all properties. Do not access any members; * use the libhal_psi_* family of functions instead. */ struct LibHalPropertySetIterator_s { LibHalPropertySet *set; /**< Property set we are iterating over */ unsigned int idx; /**< Index into current element */ LibHalProperty *cur_prop; /**< Current property being visited */ void *reservered0; /**< Reserved for future use */ void *reservered1; /**< Reserved for future use */ }; typedef struct LibHalPropertySetIterator_s LibHalPropertySetIterator; /* Initialize a property set iterator. */ void libhal_psi_init (LibHalPropertySetIterator *iter, LibHalPropertySet *set); /* Determine whether there are more properties to iterate over */ dbus_bool_t libhal_psi_has_more (LibHalPropertySetIterator *iter); /* Advance iterator to next property. */ void libhal_psi_next (LibHalPropertySetIterator *iter); /* Get type of property. */ LibHalPropertyType libhal_psi_get_type (LibHalPropertySetIterator *iter); /* Get the key of a property. */ char *libhal_psi_get_key (LibHalPropertySetIterator *iter); /* Get the value of a property of type string. */ char *libhal_psi_get_string (LibHalPropertySetIterator *iter); /* Get the value of a property of type signed integer. */ dbus_int32_t libhal_psi_get_int (LibHalPropertySetIterator *iter); /* Get the value of a property of type unsigned integer. */ dbus_uint64_t libhal_psi_get_uint64 (LibHalPropertySetIterator *iter); /* Get the value of a property of type double. */ double libhal_psi_get_double (LibHalPropertySetIterator *iter); /* Get the value of a property of type bool. */ dbus_bool_t libhal_psi_get_bool (LibHalPropertySetIterator *iter); /* Get the value of a property of type string list. */ char **libhal_psi_get_strlist (LibHalPropertySetIterator *iter); /* Get the length of an array of strings */ unsigned int libhal_string_array_length (char **str_array); /* Frees a NULL-terminated array of strings. If passed NULL, does nothing. */ void libhal_free_string_array (char **str_array); /* Frees a nul-terminated string */ void libhal_free_string (char *str); /* Create a new device object which will be hidden from applications * until the CommitToGdl(), ie. libhal_device_commit_to_gdl(), method is called. */ char *libhal_new_device (LibHalContext *ctx, DBusError *error); /* When a hidden device has been built using the NewDevice method, ie. * libhal_new_device(), and the org.freedesktop.Hal.Device interface * this function will commit it to the global device list. */ dbus_bool_t libhal_device_commit_to_gdl (LibHalContext *ctx, const char *temp_udi, const char *udi, DBusError *error); /* This method can be invoked when a device is removed. The HAL daemon * will shut down the device. Note that the device may still be in the device * list if the Persistent property is set to true. */ dbus_bool_t libhal_remove_device (LibHalContext *ctx, const char *udi, DBusError *error); /* Merge properties from one device to another. */ dbus_bool_t libhal_merge_properties (LibHalContext *ctx, const char *target_udi, const char *source_udi, DBusError *error); /* Check a set of properties for two devices matches. */ dbus_bool_t libhal_device_matches (LibHalContext *ctx, const char *udi1, const char *udi2, const char *property_namespace, DBusError *error); /* Find a device in the GDL where a single string property matches a * given value. */ char **libhal_manager_find_device_string_match (LibHalContext *ctx, const char *key, const char *value, int *num_devices, DBusError *error); /* Assign a capability to a device. */ dbus_bool_t libhal_device_add_capability (LibHalContext *ctx, const char *udi, const char *capability, DBusError *error); /* Check if a device has a capability. The result is undefined if the * device doesn't exist. */ dbus_bool_t libhal_device_query_capability (LibHalContext *ctx, const char *udi, const char *capability, DBusError *error); /* Find devices with a given capability. */ char **libhal_find_device_by_capability (LibHalContext *ctx, const char *capability, int *num_devices, DBusError *error); /* Watch all devices, ie. the device_property_changed callback is * invoked when the properties on any device changes. */ dbus_bool_t libhal_device_property_watch_all (LibHalContext *ctx, DBusError *error); /* Add a watch on a device, so the device_property_changed callback is * invoked when the properties on the given device changes. */ dbus_bool_t libhal_device_add_property_watch (LibHalContext *ctx, const char *udi, DBusError *error); /* Remove a watch on a device */ dbus_bool_t libhal_device_remove_property_watch (LibHalContext *ctx, const char *udi, DBusError *error); /* Take an advisory lock on the device. */ dbus_bool_t libhal_device_lock (LibHalContext *ctx, const char *udi, const char *reason_to_lock, char **reason_why_locked, DBusError *error); /* Release an advisory lock on the device. */ dbus_bool_t libhal_device_unlock (LibHalContext *ctx, const char *udi, DBusError *error); dbus_bool_t libhal_device_rescan (LibHalContext *ctx, const char *udi, DBusError *error); dbus_bool_t libhal_device_reprobe (LibHalContext *ctx, const char *udi, DBusError *error); /* Emit a condition from a device (for hald helpers only) */ dbus_bool_t libhal_device_emit_condition (LibHalContext *ctx, const char *udi, const char *condition_name, const char *condition_details, DBusError *error); /* Claim an interface for a device (for hald helpers only) */ dbus_bool_t libhal_device_claim_interface (LibHalContext *ctx, const char *udi, const char *interface_name, const char *introspection_xml, DBusError *error); /* hald waits for all addons to call this function before announcing the addon (for hald helpers only) */ dbus_bool_t libhal_device_addon_is_ready (LibHalContext *ctx, const char *udi, DBusError *error); #if defined(__cplusplus) } #endif #endif /* LIBHAL_H */