SD_BUS_CAN_SEND(3)              sd_bus_can_send             SD_BUS_CAN_SEND(3)

NAME
       sd_bus_can_send - Check which types can be sent over a bus object

SYNOPSIS
       #include <systemd/sd-bus.h>

       int sd_bus_can_send(sd_bus *bus, char type);

DESCRIPTION
       sd_bus_can_send() is mostly used for checking if file descriptor
       passing is available on the given bus.  type can be any of the
       SD_BUS_TYPE constants.

RETURN VALUE
       On failure, sd_bus_can_send() returns a negative errno-style error
       code. If values of the given type can be sent over the given bus, it
       returns a positive integer. Otherwise, it returns zero.

   Errors
       Returned errors may indicate the following problems:

       -ENOPKG
           The bus object bus could not be resolved.

       -ENOTCONN
           The input parameter bus is NULL or the bus is not connected.

       -ECHILD
           The bus object bus was created in a different process.

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.

       All functions listed here are thread-agnostic and only a single thread
       may operate on a given object at any given time. Different threads may
       access the same object at different times. Multiple independent objects
       may be used from different threads in parallel.

       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_can_send() was added in version 221.

SEE ALSO
       systemd(1), sd-bus(3)

systemd 261.2                                               SD_BUS_CAN_SEND(3)