SD_BUS_IS_OPEN - Online Linux Manual PageSection : 3
Updated :
Source : systemd 250
Note : sd_bus_is_open
NAMEsd_bus_is_open, sd_bus_is_ready − Check whether the bus connection is open or ready
SYNOPSIS#include <systemd/sd−bus​.h>int sd_bus_is_open(sd_bus *bus); int sd_bus_is_ready(sd_bus *bus);
DESCRIPTIONsd_bus_is_open() checks whether the specified bus connection is open, i​.e​. in the process of being established, already established or in the process of being torn down​. It returns zero when the connection has not been started yet (i​.e​. sd_bus_start(3) or some equivalent call has not been invoked yet), or is fully terminated again (for example after sd_bus_close(3)), it returns positive otherwise​. sd_bus_is_ready() checks whether the specified connection is fully established, i​.e​. completed the connection and authentication phases of the protocol and received the Hello() method call response, and is not in the process of being torn down again​. It returns zero outside of this state, and positive otherwise​. Effectively, this function returns positive while regular messages can be sent or received on the connection​. The bus argument may be NULL, zero is also returned in that case​. To be notified when the connection is fully established, use sd_bus_set_connected_signal(3) and install a match for the Connected() signal on the "org​.freedesktop​.DBus​.Local" interface​. To be notified when the connection is torn down again, install a match for the Disconnected() signal on the "org​.freedesktop​.DBus​.Local" interface​.
RETURN VALUEThose functions return 0 if the bus is not in the given state, and a positive integer when it is​. On failure, a negative errno−style error code is returned​.
ErrorsReturned errors may indicate the following problems: −ECHILD The bus connection has been created in a different process​.
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), sd_bus_start(3), sd_bus_close(3), sd_bus_set_connected_signal(3) 0
Johanes Gumabo
Data Size   :   8,474 byte
man-sd_bus_is_open.3Build   :   2024-12-05, 20:55   :  
Visitor Screen   :   x
Visitor Counter ( page / site )   :   3 / 180,242
Visitor ID   :     :  
Visitor IP   :   3.131.37.82   :  
Visitor Provider   :   AMAZON-02   :  
Provider Position ( lat x lon )   :   39.962500 x -83.006100   :   x
Provider Accuracy Radius ( km )   :   1000   :  
Provider City   :   Columbus   :  
Provider Province   :   Ohio ,   :   ,
Provider Country   :   United States   :  
Provider Continent   :   North America   :  
Visitor Recorder   :   Version   :  
Visitor Recorder   :   Library   :  
Online Linux Manual Page   :   Version   :   Online Linux Manual Page - Fedora.40 - march=x86-64 - mtune=generic - 24.12.05
Online Linux Manual Page   :   Library   :   lib_c - 24.10.03 - march=x86-64 - mtune=generic - Fedora.40
Online Linux Manual Page   :   Library   :   lib_m - 24.10.03 - march=x86-64 - mtune=generic - Fedora.40
Data Base   :   Version   :   Online Linux Manual Page Database - 24.04.13 - march=x86-64 - mtune=generic - fedora-38
Data Base   :   Library   :   lib_c - 23.02.07 - march=x86-64 - mtune=generic - fedora.36
Very long time ago, I have the best tutor, Wenzel Svojanovsky . If someone knows the email address of Wenzel Svojanovsky , please send an email to johanes_gumabo@yahoo.co.id .
If error, please print screen and send to johanes_gumabo@yahoo.co.id
Under development. Support me via PayPal.