1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
|
'\" t
.TH "SD_BUS_MESSAGE_DUMP" "3" "" "systemd 255" "sd_bus_message_dump"
.\" -----------------------------------------------------------------
.\" * Define some portability stuff
.\" -----------------------------------------------------------------
.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.\" http://bugs.debian.org/507673
.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html
.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.ie \n(.g .ds Aq \(aq
.el .ds Aq '
.\" -----------------------------------------------------------------
.\" * set default formatting
.\" -----------------------------------------------------------------
.\" disable hyphenation
.nh
.\" disable justification (adjust text to left margin only)
.ad l
.\" -----------------------------------------------------------------
.\" * MAIN CONTENT STARTS HERE *
.\" -----------------------------------------------------------------
.SH "NAME"
sd_bus_message_dump \- Produce a string representation of a message for debugging purposes
.SH "SYNOPSIS"
.sp
.ft B
.nf
#include <systemd/sd\-bus\&.h>
.fi
.ft
.HP \w'int\ sd_bus_message_dump('u
.BI "int sd_bus_message_dump(sd_bus_message\ *" "m" ", FILE\ *" "f" ", uint64_t\ " "flags" ");"
.PP
\fBSD_BUS_MESSAGE_DUMP_WITH_HEADER\fR,
\fBSD_BUS_MESSAGE_DUMP_SUBTREE_ONLY\fR
.SH "DESCRIPTION"
.PP
The
\fBsd_bus_message_dump()\fR
function writes a textual representation of the message
\fIm\fR
to the stream
\fIf\fR\&. If
\fIf\fR
is
\fBNULL\fR, standard output (\fBstdio\fR) 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\&.
.PP
The
\fIflags\fR
parameter may be used to modify the output\&. With
\fBSD_BUS_MESSAGE_DUMP_WITH_HEADER\fR, a header that specifies the message type and flags and some additional metadata is printed\&. When
\fBSD_BUS_MESSAGE_DUMP_SUBTREE_ONLY\fR
is not passed, the contents of the whole message are printed\&. When it
\fIis\fR
passed, only the current container in printed\&.
.PP
Note that this function moves the read pointer of the message\&. It may be necessary to reset the position afterwards, for example with
\fBsd_bus_message_rewind\fR(3)\&.
.SH "EXAMPLES"
.PP
Output for a signal message (with
\fBSD_BUS_MESSAGE_DUMP_WITH_HEADER\fR):
.sp
.if n \{\
.RS 4
.\}
.nf
>\& 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";
};
};
.fi
.if n \{\
.RE
.\}
.sp
.SH "RETURN VALUE"
.PP
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\&.
.SH "NOTES"
.PP
Functions described here are available as a shared library, which can be compiled against and linked to with the
\fBlibsystemd\fR\ \&\fBpkg-config\fR(1)
file\&.
.PP
The code described here uses
\fBgetenv\fR(3), which is declared to be not multi\-thread\-safe\&. This means that the code calling the functions described here must not call
\fBsetenv\fR(3)
from a parallel thread\&. It is recommended to only do calls to
\fBsetenv()\fR
from an early phase of the program when no other threads have been started\&.
.SH "SEE ALSO"
.PP
\fBsystemd\fR(1),
\fBsd-bus\fR(3)
|
