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NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | NOTES | HISTORY | SEE ALSO | COLOPHON |
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SD_BUS_SET_SENDER(3) sd_bus_set_sender SD_BUS_SET_SENDER(3)
sd_bus_set_sender, sd_bus_get_sender - Configure default sender
for outgoing messages
#include <systemd/sd-bus.h>
int sd_bus_set_sender(sd_bus *bus, const char* name);
int sd_bus_get_sender(sd_bus *bus, const char** name);
sd_bus_set_sender() configures the default sender service name to
use for outgoing messages. The service name specified in the name
parameter is set on all outgoing messages that are sent on the
connection and have no sender set yet, for example through
sd_bus_message_set_sender(3). Note that this function is only
supported on direct connections, i.e. not on connections to a bus
broker as the broker will fill in the sender service name
automatically anyway. By default, no sender name is configured,
and hence messages are sent without sender field set. If the name
parameter is specified as NULL the default sender service name is
cleared, returning to the default state if a default sender
service name was set before. If passed as non-NULL the specified
name must be a valid unique or well-known service name.
sd_bus_get_sender() may be used to query the current default
service name for outgoing messages.
On success, these functions return 0 or a positive integer. On
failure, they return a negative errno-style error code.
Errors
Returned errors may indicate the following problems:
-ECHILD
The bus connection has been created in a different process,
library or module instance.
-EPERM
The specified bus connection object is a not a direct but a
brokered connection.
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_set_sender() and sd_bus_get_sender() were added in version
237.
systemd(1), sd-bus(3), sd_bus_message_set_sender(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 2025-08-11. (At that
time, the date of the most recent commit that was found in the
repository was 2025-08-11.) 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
[email protected]
systemd 258~rc2 SD_BUS_SET_SENDER(3)
Pages that refer to this page: sd-bus(3), sd_bus_message_set_destination(3), systemd.directives(7), systemd.index(7)
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HTML rendering created 2025-09-06 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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