'\" t
.TH "SD_BUS_CAN_SEND" "3" "" "systemd 247" "sd_bus_can_send"
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.SH "NAME"
sd_bus_can_send \- Check which types can be sent over a bus object
.SH "SYNOPSIS"
.sp
.ft B
.nf
#include <systemd/sd\-bus\&.h>
.fi
.ft
.HP \w'void\ sd_bus_can_send('u
.BI "void sd_bus_can_send(sd_bus\ *" "bus" ", char\ " "type" ");"
.SH "DESCRIPTION"
.PP
\fBsd_bus_can_send()\fR
is mostly used for checking if file descriptor passing is available on the given bus\&.
\fItype\fR
can be any of the
\fBSD_BUS_TYPE\fR
constants\&.
.SH "RETURN VALUE"
.PP
On failure,
\fBsd_bus_can_send()\fR
returns a negative errno\-style error code\&. If values of the given type can be sent over the given bus, it returns a positive integer\&. Otherwise, it returns zero\&.
.SS "Errors"
.PP
Returned errors may indicate the following problems:
.PP
\fB\-ENOPKG\fR
.RS 4
The bus object
\fIbus\fR
could not be resolved\&.
.RE
.PP
\fB\-ENOTCONN\fR
.RS 4
The input parameter
\fIbus\fR
is
\fBNULL\fR
or the bus is not connected\&.
.RE
.PP
\fB\-ECHILD\fR
.RS 4
The bus object
\fIbus\fR
was created in a different process\&.
.RE
.SH "NOTES"
.PP
These APIs are implemented as a shared library, which can be compiled and linked to with the
\fBlibsystemd\fR\ \&\fBpkg-config\fR(1)
file\&.
.SH "SEE ALSO"
.PP
\fBsystemd\fR(1),
\fBsd-bus\fR(3)