'\" t .TH "SD_BUS_LIST_NAMES" "3" "" "systemd 256.7" "sd_bus_list_names" .\" ----------------------------------------------------------------- .\" * 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_list_names \- Retrieve information about registered names on a bus .SH "SYNOPSIS" .sp .ft B .nf #include .fi .ft .HP \w'int\ sd_bus_list_names('u .BI "int sd_bus_list_names(sd_bus\ *" "bus" ", char\ ***" "acquired" ", char\ ***" "activatable" ");" .SH "DESCRIPTION" .PP \fBsd_bus_list_names()\fR retrieves information about the registered names on a bus\&. If \fIacquired\fR is not \fBNULL\fR, this function calls \m[blue]\fBorg\&.freedesktop\&.DBus\&.ListNames\fR\m[]\&\s-2\u[1]\d\s+2 to retrieve the list of currently\-owned names on the bus\&. If \fIacquired\fR is not \fBNULL\fR, the function calls \m[blue]\fBorg\&.freedesktop\&.DBus\&.ListActivableNames\fR\m[]\&\s-2\u[2]\d\s+2 to retrieve the list of all names on the bus that can be activated\&. Note that ownership of the arrays returned by \fBsd_bus_list_names()\fR in \fIacquired\fR and \fIactivatable\fR is transferred to the caller and hence, the caller is responsible for freeing these arrays and their contents\&. .SH "RETURN VALUE" .PP On success, \fBsd_bus_list_names()\fR returns a non\-negative integer\&. On failure, it returns a negative errno\-style error code\&. .SS "Errors" .PP Returned errors may indicate the following problems: .PP \fB\-EINVAL\fR .RS 4 \fIbus\fR or both \fIacquired\fR and \fIactivatable\fR were \fBNULL\fR\&. .RE .PP \fB\-ENOPKG\fR .RS 4 The bus cannot be resolved\&. .RE .PP \fB\-ECHILD\fR .RS 4 The bus was created in a different process, library or module instance\&. .RE .PP \fB\-ENOMEM\fR .RS 4 Memory allocation failed\&. .RE .PP \fB\-ENOTCONN\fR .RS 4 The bus is not connected\&. .RE .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 "HISTORY" .PP \fBsd_bus_list_names()\fR was added in version 221\&. .SH "SEE ALSO" .PP \fBsystemd\fR(1), \fBsd-bus\fR(3) .SH "NOTES" .IP " 1." 4 org.freedesktop.DBus.ListNames .RS 4 \%https://dbus.freedesktop.org/doc/dbus-specification.html#bus-messages-list-names .RE .IP " 2." 4 org.freedesktop.DBus.ListActivableNames .RS 4 \%https://dbus.freedesktop.org/doc/dbus-specification.html#bus-messages-list-activatable-names .RE