sd_bus_message_seal

systemd
sd_bus_message_seal 3
sd_bus_message_seal Prepare a D-Bus message for transmission

    #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.

## See Also

systemd 1, sd-bus 3, sd_bus_call 3, sd_bus_call_async 3, sd_bus_send 3