Watches child_pid. When the process exists, the #VteTerminal::child-exited
signal will be called with the child's exit status.
Prior to calling this function, a #VtePty must have been set in terminal
using vte.terminal.Terminal.setPty.
When the child exits, the terminal's #VtePty will be set to null.
Watches child_pid. When the process exists, the #VteTerminal::child-exited signal will be called with the child's exit status.
Prior to calling this function, a #VtePty must have been set in terminal using vte.terminal.Terminal.setPty. When the child exits, the terminal's #VtePty will be set to null.
Note: glib.global.childWatchAdd or glib.global.childWatchAddFull must not have been called for child_pid, nor a #GSource for it been created with glib.global.childWatchSourceNew.
Note: when using the glib.global.spawnAsync family of functions, the G_SPAWN_DO_NOT_REAP_CHILD flag MUST have been passed.