SD_BUS_MESSAGE_VERIFY_TYPE

Section: sd_bus_message_verify_type (3)
Updated:
Page Index

NAME

sd_bus_message_verify_type - Check if the message has specified type at the current location

SYNOPSIS

#include <systemd/sd-bus.h>

int sd_bus_message_verify_type(sd_bus_message *m, char type, const char* contents);

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.

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.

NOTES

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