sd_bus_message_dump(3) — Linux manual page


SD_BUS_MESSAGE_DUMP(3)       sd_bus_message_dump      SD_BUS_MESSAGE_DUMP(3)

NAME         top

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

SYNOPSIS         top

       #include <systemd/sd-bus.h>

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


DESCRIPTION         top

       The sd_bus_message_dump() function writes a textual representation of
       the message m to the stream f. 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

EXAMPLES         top

       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         top

       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         top

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

SEE ALSO         top

       systemd(1), sd-bus(3)

COLOPHON         top

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systemd 246                                           SD_BUS_MESSAGE_DUMP(3)

Pages that refer to this page: sd-bus(3)30-systemd-environment-d-generator(7)systemd.directives(7)systemd.index(7)