SD_BUS_CAN_SEND(3) sd_bus_can_send SD_BUS_CAN_SEND(3)
sd_bus_can_send - Check which types can be sent over a bus object
#include <systemd/sd-bus.h> void sd_bus_can_send(sd_bus *bus, char type);
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.
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.
These APIs are implemented as a shared library, which can be compiled and linked to with the libsystemd pkg-config(1) file.
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Pages that refer to this page: sd-bus(3), sd_bus_negotiate_fds(3), systemd.directives(7), systemd.index(7)