x SuSE Linux 13.1-RELEASE x
x SuSE Linux 13.1-RELEASEx
SD_BUS_CAN_SEND(3) sd_bus_can_send SD_BUS_CAN_SEND(3)
NAME
sd_bus_can_send - Check which types can be sent over a bus object
SYNOPSIS
#include <systemd/sd-bus.h>
void sd_bus_can_send(sd_bus *bus, char type);
DESCRIPTION
sd_bus_can_send() is mostly used for checking if file descriptor
passing is available on the given bus. type can be any of the
SD_BUS_TYPE constants.
RETURN VALUE
On failure, sd_bus_can_send() 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.
Errors
Returned errors may indicate the following problems:
-ENOPKG
The bus object bus could not be resolved.
-ENOTCONN
The input parameter bus is NULL or the bus is not connected.
-ECHILD
The bus object bus was created in a different process.
NOTES
Functions described here are available as a shared library, which can
be compiled against and linked to with the libsystemd pkg-config(1)
file.
The code described here uses getenv(3), which is declared to be not
multi-thread-safe. This means that the code calling the functions
described here must not call setenv(3) from a parallel thread. It is
recommended to only do calls to setenv() from an early phase of the
program when no other threads have been started.
SEE ALSO
systemd(1), sd-bus(3)
systemd 254 SD_BUS_CAN_SEND(3)
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