NAME

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

SYNOPSIS

       #include <systemd/sd-bus.h>

       void 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.

           Added in version 246.

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

           Added in version 246.

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

           Added in version 246.

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_can_send() was added in version 246.

SEE ALSO

       systemd(1), sd-bus(3)