SD_BUS_MESSAGE_DUMP - Online Linux Manual Page

Section : 3
Updated :
Source : systemd 250
Note : sd_bus_message_dump

NAMEsd_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

DESCRIPTIONThe 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 sd_bus_message_rewind(3)​.

EXAMPLESOutput 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 VALUEOn 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​.

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

SEE ALSOsystemd(1), sd-bus(3)
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