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NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | NOTES | HISTORY | SEE ALSO | COLOPHON |
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SD_BUS_MESSAGE_SEAL(3) sd_bus_message_seal 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);
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.
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.
Added in version 246.
-EBADMSG
The D-Bus message m has open containers.
Added in version 246.
-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.
Added in version 246.
Functions described here are available as a shared library, which
can be compiled against and linked to with the
libsystemd pkg-config(1) file.
The code described here uses getenv(3), which is declared to be
not multi-thread-safe. This means that the code calling the
functions described here must not call setenv(3) from a parallel
thread. It is recommended to only do calls to setenv() from an
early phase of the program when no other threads have been
started.
sd_bus_message_seal() was added in version 246.
systemd(1), sd-bus(3), sd_bus_call(3), sd_bus_call_async(3),
sd_bus_send(3)
This page is part of the systemd (systemd system and service
manager) project. Information about the project can be found at
⟨http://www.freedesktop.org/wiki/Software/systemd⟩. If you have
a bug report for this manual page, see
⟨http://www.freedesktop.org/wiki/Software/systemd/#bugreports⟩.
This page was obtained from the project's upstream Git repository
⟨https://github.com/systemd/systemd.git⟩ on 2023-12-22. (At that
time, the date of the most recent commit that was found in the
repository was 2023-12-22.) If you discover any rendering
problems in this HTML version of the page, or you believe there
is a better or more up-to-date source for the page, or you have
corrections or improvements to the information in this COLOPHON
(which is not part of the original manual page), send a mail to
man-pages@man7.org
systemd 255 SD_BUS_MESSAGE_SEAL(3)
Pages that refer to this page: sd-bus(3), systemd.directives(7), systemd.index(7)
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HTML rendering created 2023-12-22 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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