This manual page was written for the Debian distribution because the original program does not have a manual page.

libhandoff is used in the GPE Palmtop Environment to cause another program instance to come to the foreground. This is used when alarm triggers (like atd) wake the device and then need to load another program to show the reason for the device waking up. When gpe-calendar starts it looks at a well known location to find another instance of itself. If it does, it tells that instance to grab the focus.

This man page is for libhandoff0 version 0.1.

extern Handoff * handoff_new(void);

extern gboolean handoff_handoff(Handoff *handoff, const char *rendezvous, const char *data, gboolean display_relevant, char *(*serialize) (Handoff *), void (*exit)(Handoff *));

rendezvous is the address which all instances of this program rendezvous with.

If another instance of the program is contacted then: if display_relevant is true, the value of the environment variable DISPLAY is sent; and if data is non-NULL, its value is sent. If the handoff request (DISPLAY is either not sent or they are identical), this function returns TRUE and this instance should proceed to exit. Otherwise, if the other instance punts, it sends a serialization of its state and the "handoff" signal is fired and TRUE is returned.

If no running instance is found to be listening on rendezvous or the instance punts, this instance attempts to bind to rendezvous so that subsequent instances can find this instance and FALSE is returned.

After connecting, this instance waits on rendezvous for other instances to connect. When an instance connects and hands off its state, the "handoff" signal is fired. If this instance decides to yield (based on the above criteria), then serialize is called to serialize any state. Once the handoff completes, exit is called and this instance should proceed to do any final clean up and exit.