systemd sd_bus_message_verify_type 3 sd_bus_message_verify_type Check if the message has specified type at the current location #include <systemd/sd-bus.h> int sd_bus_message_verify_type sd_bus_message *m char type const char* contents 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_append1. 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. 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. 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. systemd1, sd-bus3, sd_bus_message_append3