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NAME | SYNOPSIS | DESCRIPTION | EXAMPLES | RETURN VALUE | NOTES | SEE ALSO | COLOPHON |
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SD_BUS_MESSAGE_DUMP(3) sd_bus_message_dump SD_BUS_MESSAGE_DUMP(3)
sd_bus_message_dump - Produce a string representation of a message
for debugging purposes
#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
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
sd_bus_message_rewind(3).
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";
};
};
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.
These APIs are implemented as a shared library, which can be compiled
and linked to with the libsystemd pkg-config(1) file.
systemd(1), sd-bus(3)
This page is part of the systemd (systemd system and service manager)
project. Information about the project can be found at
⟨http://www.freedesktop.org/wiki/Software/systemd⟩. If you have a bug
report for this manual page, see
⟨http://www.freedesktop.org/wiki/Software/systemd/#bugreports⟩. This
page was obtained from the project's upstream Git repository
⟨https://github.com/systemd/systemd.git⟩ on 2020-06-09. (At that
time, the date of the most recent commit that was found in the repos‐
itory was 2020-06-09.) If you discover any rendering problems in
this HTML version of the page, or you believe there is a better or
more up-to-date source for the page, or you have corrections or
improvements to the information in this COLOPHON (which is not part
of the original manual page), send a mail to man-pages@man7.org
systemd 245 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)
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