Index · Directives systemd 246

Name

sd_bus_call_method, sd_bus_call_methodv, sd_bus_call_method_async, sd_bus_call_method_asyncv — Initialize a bus message object and invoke the corresponding D-Bus method call

Synopsis

#include <systemd/sd-bus.h>
typedef int (*sd_bus_message_handler_t)(sd_bus_message *m,
 void *userdata,
 sd_bus_error *ret_error);
 
int sd_bus_call_method(sd_bus *bus,
 const char *destination,
 const char *path,
 const char *interface,
 const char *member,
 sd_bus_error *ret_error,
 sd_bus_message **reply,
 const char *types,
 ...);
 
int sd_bus_call_methodv(sd_bus *bus,
 const char *destination,
 const char *path,
 const char *interface,
 const char *member,
 sd_bus_error *ret_error,
 sd_bus_message **reply,
 const char *types,
 va_list ap);
 
int sd_bus_call_method_async(sd_bus *bus,
 sd_bus_slot **slot,
 const char *destination,
 const char *path,
 const char *interface,
 const char *member,
 sd_bus_message_handler_t callback,
 void *userdata,
 const char *types,
 ...);
 
int sd_bus_call_method_asyncv(sd_bus *bus,
 sd_bus_slot **slot,
 const char *destination,
 const char *path,
 const char *interface,
 const char *member,
 sd_bus_message_handler_t callback,
 void *userdata,
 const char *types,
 va_list ap);
 

Description

sd_bus_call_method() is a convenience function for initializing a bus message object and calling the corresponding D-Bus method. It combines the sd_bus_message_new_method_call(3), sd_bus_message_append(3) and sd_bus_call(3) functions into a single function call.

sd_bus_call_method_async() is a convenience function for initializing a bus message object and calling the corresponding D-Bus method asynchronously. It combines the sd_bus_message_new_method_call(3), sd_bus_message_append(3) and sd_bus_call_async(3) functions into a single function call.

Return Value

On success, these functions return a non-negative integer. On failure, they return a negative errno-style error code.

Errors

See the man pages of sd_bus_message_new_method_call(3), sd_bus_message_append(3), sd_bus_call(3) and sd_bus_call_async(3) for a list of possible errors.

Notes

These APIs are implemented as a shared library, which can be compiled and linked to with the libsystemd pkg-config(1) file.

See Also

systemd(1), sd-bus(3), sd_bus_message_new_method_call(3), sd_bus_message_append(3), sd_bus_call(3), sd_bus_set_property(3), sd_bus_emit_signal(3)