NAME

       sd_bus_message_dump - Produce a string representation of a message for debugging purposes

SYNOPSIS

       #include <systemd/sd-bus.h>

       int sd_bus_message_dump(sd_bus_message *m, FILE *f, uint64_t flags);

       SD_BUS_MESSAGE_DUMP_WITH_HEADER, SD_BUS_MESSAGE_DUMP_SUBTREE_ONLY

DESCRIPTION

       The sd_bus_message_dump() function writes a textual representation of the message m to the stream f. If f
       is NULL, standard output (stdio) will be used. This function is intended to be used for debugging
       purposes, and the output is neither stable nor designed to be machine readable.

       The flags parameter may be used to modify the output. With SD_BUS_MESSAGE_DUMP_WITH_HEADER, a header that
       specifies the message type and flags and some additional metadata is printed. When
       SD_BUS_MESSAGE_DUMP_SUBTREE_ONLY is not passed, the contents of the whole message are printed. When it is
       passed, only the current container in printed.

       Note that this function moves the read pointer of the message. It may be necessary to reset the position
       afterwards, for example with sd_bus_message_rewind(3).

EXAMPLES

       Output for a signal message (with SD_BUS_MESSAGE_DUMP_WITH_HEADER):

           > Type=signal  Endian=l  Flags=1  Version=1  Cookie=22
             Path=/value/a  Interface=org.freedesktop.DBus.Properties  Member=PropertiesChanged
             MESSAGE "sa{sv}as" {
                     STRING "org.freedesktop.systemd.ValueTest";
                     ARRAY "{sv}" {
                             DICT_ENTRY "sv" {
                                     STRING "Value";
                                     VARIANT "s" {
                                             STRING "object 0x1e, path /value/a";
                                     };
                             };
                     };
                     ARRAY "s" {
                             STRING "Value2";
                             STRING "AnExplicitProperty";
                     };
             };

RETURN VALUE

       On success, this function returns 0 or a positive integer. On failure, it returns a negative errno-style
       error code. No error codes are currently defined.

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)