SD_BUS_MESSAGE_SET_EXPECsd_bus_message_set_eSD_BUS_MESSAGE_SET_EXPECT_REPLY(3)

NAME
       sd_bus_message_set_expect_reply, sd_bus_message_get_expect_reply,
       sd_bus_message_set_auto_start, sd_bus_message_get_auto_start,
       sd_bus_message_set_allow_interactive_authorization,
       sd_bus_message_get_allow_interactive_authorization - Set and query bus
       message metadata

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

       int sd_bus_message_set_expect_reply(sd_bus_message *message, int b);

       int sd_bus_message_get_expect_reply(sd_bus_message *message);

       int sd_bus_message_set_auto_start(sd_bus_message *message, int b);

       int sd_bus_message_get_auto_start(sd_bus_message *message);

       int
                                                              sd_bus_message_set_allow_interactive_authorization(sd_bus_message *message,
                                                              int b);

       int
                                                              sd_bus_message_get_allow_interactive_authorization(sd_bus_message *message);

DESCRIPTION
       sd_bus_message_set_expect_reply() sets or clears the NO_REPLY_EXPECTED
       flag on the message m. This flag matters only for method call messages
       and is used to specify that no method return or error reply is
       expected. It is ignored for other types. Thus, for a method call
       message, calling

           sd_bus_message_set_expect_reply(..., 0)

       sets the flag and suppresses the reply.

       sd_bus_message_get_expect_reply() checks if the NO_REPLY_EXPECTED flag
       is set on the message m. It will return positive if it is not set, and
       zero if it is.

       sd_bus_message_set_auto_start() sets or clears the NO_AUTO_START flag
       on the message m. When the flag is set, the bus must not launch an
       owner for the destination name in response to this message. Calling

           sd_bus_message_set_auto_start(..., 0)

       sets the flag.

       sd_bus_message_get_auto_start() checks if the NO_AUTO_START flag is set
       on the message m. It will return positive if it is not set, and zero if
       it is.

       sd_bus_message_set_allow_interactive_authorization() sets or clears the
       ALLOW_INTERACTIVE_AUTHORIZATION flag on the message m. Setting this
       flag informs the receiver that the caller is prepared to wait for
       interactive authorization via polkit or a similar framework. Note that
       setting this flag does not guarantee that the receiver will actually
       perform interactive authorization. Also, make sure to set a suitable
       message timeout when using this flag since interactive authorization
       could potentially take a long time as it depends on user input. If b is
       non-zero, the flag is set.

       sd_bus_message_get_allow_interactive_authorization() checks if the
       ALLOW_INTERACTIVE_AUTHORIZATION flag is set on the message m. It will
       return a positive integer if the flag is set. Otherwise, it returns
       zero.

RETURN VALUE
       On success, these functions return a non-negative integer. On failure,
       they return a negative errno-style error code.

   Errors
       Returned errors may indicate the following problems:

       -EINVAL
           The message parameter is NULL.

       -EPERM
           The message message is sealed when trying to set a flag.

           The message message has wrong type.

NOTES
       These APIs are implemented as a shared library, which can be compiled
       and linked to with the libsystemd pkg-config(1) file.

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

systemd 252                                 SD_BUS_MESSAGE_SET_EXPECT_REPLY(3)

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