NAME

       sd_bus_slot_set_description, sd_bus_slot_get_description - Set or query the description of
       bus slot objects

SYNOPSIS

       #include <systemd/sd-bus.h>

       int sd_bus_slot_set_description(sd_bus_slot* slot, const char *description);

       int sd_bus_slot_get_description(sd_bus_slot* bus, const char **description);

DESCRIPTION

       sd_bus_slot_set_description() sets the description string that is used in logging to the
       specified string. The string is copied internally and freed when the bus slot object is
       deallocated. The description argument may be NULL, in which case the description is unset.

       sd_bus_slot_get_description() returns a description string in description. If the string
       is not set, e.g. with sd_bus_slot_set_description(), and the slot is a bus match callback
       slot, the match string will be returned. Otherwise, -ENXIO is returned.

RETURN VALUE

       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:

       -EINVAL
           An required argument is NULL.

       -ENXIO
           The bus slot object has no description.

       -ENOMEM
           Memory allocation failed.

NOTES

       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.

HISTORY

       sd_bus_slot_set_description() and sd_bus_slot_get_description() were added in version 240.

SEE ALSO

       systemd(1), sd-bus(3), sd_bus_slot_ref(3), sd_bus_slot_set_userdata(3)