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sd_bus_slot_get_bus(3) — Linux manual page

SD_BUS_SLOT_GET_BUS(3)     sd_bus_slot_get_busSD_BUS_SLOT_GET_BUS(3)

NAME        top

       sd_bus_slot_get_bus, sd_bus_slot_get_current_handler,       sd_bus_slot_get_current_message, sd_bus_slot_get_current_userdata       - Query information attached to a bus slot object

SYNOPSIS        top

#include <systemd/sd-bus.h>typedef int (*sd_bus_message_handler_t)(sd_bus_message *m,void *userdata,sd_bus_error *ret_error);sd_bus *sd_bus_slot_get_bus(sd_bus_slot *slot);sd_bus_message_handler_tsd_bus_slot_get_current_handler(sd_bus_slot *slot);sd_bus_message*sd_bus_slot_get_current_message(sd_bus_slot *slot);void *sd_bus_slot_get_current_userdata(sd_bus_slot *slot);

DESCRIPTION        top

sd_bus_slot_get_bus()returns the bus object that messageslot is       attached to.sd_bus_slot_get_current_handler(),sd_bus_slot_get_current_message()andsd_bus_slot_get_current_userdata()return the current handler,       message and userdata respectively of the busslot is attached to       if we're currently executing the callback associated withslot.

RETURN VALUE        top

sd_bus_slot_get_bus()always returns the bus object.       On success,sd_bus_slot_get_current_handler(),sd_bus_slot_get_current_message()andsd_bus_slot_get_current_userdata()return the requested object. On       failure, they returnNULL.

NOTES        top

       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.

HISTORY        top

sd_bus_slot_get_bus(),sd_bus_slot_get_current_handler(),sd_bus_slot_get_current_message(), andsd_bus_slot_get_current_userdata()were added in version 246.

SEE ALSO        top

systemd(1),sd-bus(3)

COLOPHON        top

       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_SLOT_GET_BUS(3)

Pages that refer to this page:sd-bus(3), sd_bus_slot_set_userdata(3), systemd.directives(7), systemd.index(7)

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