NAME

       sd_bus_reply_method_error, sd_bus_reply_method_errorf, sd_bus_reply_method_errorfv,
       sd_bus_reply_method_errno, sd_bus_reply_method_errnof, sd_bus_reply_method_errnofv - Reply
       with an error to a D-Bus method call

SYNOPSIS

       #include <systemd/sd-bus.h>

       int sd_bus_reply_method_error(sd_bus_message *call, const sd_bus_error *e);

       int sd_bus_reply_method_errorf(sd_bus_message *call, const char *name, const char *format,
                                      ...);

       int sd_bus_reply_method_errorfv(sd_bus_message *call, const char *name,
                                       const char *format, va_list ap);

       int sd_bus_reply_method_errno(sd_bus_message *call, int error, const sd_bus_error *p);

       int sd_bus_reply_method_errnof(sd_bus_message *call, int error, const char *format, ...);

       int sd_bus_reply_method_errnofv(sd_bus_message *call, int error, const char *format,
                                       va_list ap);

DESCRIPTION

       The sd_bus_reply_method_error() function sends an error reply to the call message. The
       error structure e specifies the error to send, and is used as described in
       sd_bus_message_new_method_error(3). If no reply is expected to call, this function
       succeeds without sending a reply.

       The sd_bus_reply_method_errorf() is to sd_bus_reply_method_error() what
       sd_bus_message_new_method_errorf() is to sd_bus_message_new_method_error().

       The sd_bus_reply_method_errno() is to sd_bus_reply_method_error() what
       sd_bus_message_new_method_errno() is to sd_bus_message_new_method_error().

       The sd_bus_reply_method_errnof() is to sd_bus_reply_method_error() what
       sd_bus_message_new_method_errnof() is to sd_bus_message_new_method_error().

RETURN VALUE

       This function returns a non-negative integer if the error reply was successfully sent or
       if call does not expect a reply. 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.

           The error parameter e to sd_bus_reply_method_error() is not set, see
           sd_bus_error_is_set(3).

       -EPERM
           Message call has been sealed.

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

       -ENOMEM
           Memory allocation failed.

       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_error(3)