noble (3) sd_bus_reply_method_return.3.gz

NAME

       sd_bus_reply_method_return, sd_bus_reply_method_returnv - Reply to a D-Bus method call

SYNOPSIS

       #include <systemd/sd-bus.h>

       int sd_bus_reply_method_return(sd_bus_message *call, const char *types, ...);

       int sd_bus_reply_method_returnv(sd_bus_message *call, const char *types, va_list ap);

DESCRIPTION

       sd_bus_reply_method_return() sends a reply to the call message. The type string types and the arguments
       that follow it must adhere to the format described in sd_bus_message_append(3). If no reply is expected
       to call, this function succeeds without sending a reply.

RETURN VALUE

       On success, this function returns a non-negative integer. On failure, it returns a negative errno-style
       error code.

   Errors
       Returned errors may indicate the following problems:

       -EINVAL
           The input parameter call is NULL.

           Message call is not a method call message.

           Message call is not attached to a bus.

           Message m is not a method reply message.

           Added in version 246.

       -EPERM
           Message call has been sealed.

           Added in version 246.

       -ENOTCONN
           The bus to which message call is attached is not connected.

           Added in version 246.

       -ENOMEM
           Memory allocation failed.

           Added in version 246.

       In addition, any error returned by sd_bus_send(1) may be returned.

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.

SEE ALSO

       systemd(1), sd-bus(3), sd_bus_message_new_method_return(3)