systemd sd_bus_message_copy 3 sd_bus_message_copy Copy the contents of one message to another #include <systemd/sd-bus.h> int sd_bus_message_copy sd_bus_message *m sd_bus_message *source int all sd_bus_message_copy() copies the contents from message source to m. If all is false, a single complete type is copied (basic or container). If all is true, the contents are copied until the end of the currently open container or the end of source. On success, this call returns true if anything was copied, and false if there was nothing to copy. On failure, it returns a negative errno-style error code. Returned errors may indicate the following problems: -EINVAL source or m are NULL. -EPERM Message m has been sealed or source has not been sealed. -ESTALE Destination message is in invalid state. -ENXIO Destination message cannot be appended to. -ENOMEM Memory allocation failed. systemd1 sd-bus3 sd_bus_message_append3