SD_BUS_MESSAGE_SEAL

Section: sd_bus_message_seal (3)
Updated:
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NAME

sd_bus_message_seal - Prepare a D-Bus message for transmission

SYNOPSIS

#include <systemd/sd-bus.h>

int sd_bus_message_seal(sd_bus_message *m, uint64_t cookie, uint64_t timeout_usec);

DESCRIPTION

sd_bus_message_seal()

finishes the message m and prepares it for transmission using sd_bus_send(3). cookie specifies the identifier used to match the message reply to its corresponding request. timeout_usec specifies the maximum time in microseconds to wait for a reply to arrive.

Note that in most scenarios, it's not necessary to call this function directly. sd_bus_call(3), sd_bus_call_async(3) and sd_bus_send(3) will seal any given messages if they have not been sealed yet.

RETURN VALUE

On success, this function returns a non-negative integer. On failure, it returns a negative errno-style error code.

Errors

Returned errors may indicate the following problems:

-EINVAL

: The m parameter is NULL.

-EBADMSG

: The D-Bus message m has open containers.

-ENOMSG

: The D-Bus message m is a reply but its type signature does not match the return type signature of its corresponding member in the object vtable.

NOTES

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