проверить, имеет ли сообщение указанный тип в текущем месте (Check if the message has specified type at the current location)
Имя (Name)
sd_bus_message_verify_type - Check if the message has specified
type at the current location
Синопсис (Synopsis)
#include <systemd/sd-bus.h>
int sd_bus_message_verify_type(sd_bus_message *m, char type,
const char* contents);
Описание (Description)
sd_bus_message_verify_type() checks if the complete type at the
current location in the message m matches the specified type and
contents. If non-zero, parameter type must be one of the types
specified in sd_bus_message_append(1). If non-null, parameter
contents must be a valid sequence of complete types. If both type
and contents are specified type must be a container type.
If type is specified, the type in the message must match. If
contents is specified, the type in the message must be a
container type with this signature.
Возвращаемое значение (Return value)
On success, this call returns true if the type matches and zero
if not (the message m contains different data or the end of the
message has been reached). On failure, it returns a negative
errno-style error code.
Errors
Returned errors may indicate the following problems:
-EINVAL
m or both type and contents are NULL.
Arguments do not satisfy other constraints listed above.
-EPERM
Message m is not sealed.
Примечание (Note)
These APIs are implemented as a shared library, which can be
compiled and linked to with the libsystemd pkg-config(1) file.
Смотри также (See also)
systemd(1), sd-bus(3), sd_bus_message_append(3)
