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NAME |SYNOPSIS |DESCRIPTION |RETURN VALUE |NOTES |HISTORY |SEE ALSO |COLOPHON | |
SD_BUS_SET_SENDER(3) sd_bus_set_senderSD_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 thename parameter is set on all outgoing messages that are sent on the connection and have no sender set yet, for example throughsd_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 thename parameter is specified asNULLthe default sender service name is cleared, returning to the default state if a default sender service name was set before. If passed as non-NULLthe 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 thelibsystemd pkg-config(1) file. The code described here usesgetenv(3), which is declared to be not multi-thread-safe. This means that the code calling the functions described here must not callsetenv(3) from a parallel thread. It is recommended to only do calls tosetenv()from an early phase of the program when no other threads have been started.
sd_bus_set_sender()andsd_bus_get_sender()were added in version 237.
systemd(1),sd-bus(3),sd_bus_message_set_sender(3)
This page is part of thesystemd (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 isnot part of the original manual page), send a mail to man-pages@man7.orgsystemd 258~rc2SD_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)
HTML rendering created 2025-09-06 byMichael Kerrisk, author ofThe Linux Programming Interface. For details of in-depthLinux/UNIX system programming training courses that I teach, lookhere. Hosting byjambit GmbH. | |