Prototype of a
GChildWatchSource callback, called when a child
process has exited.
wait_status, see the documentation
for g_spawn_check_wait_status(). In particular,
on Unix platforms, note that it is usually not equal
to the integer passed to
exit() or returned from
The process id of the child process.
Status information about the child process, encoded in a platform-specific manner.
User data passed to
The argument can be
The data is owned by the caller of the function.