Deleting a process disconnects Emacs immediately from the
subprocess, and removes it from the list of active processes. It sends
a signal to the subprocess to make the subprocess terminate, but this is
not guaranteed to happen immediately. The process object itself
continues to exist as long as other Lisp objects point to it. The
process mark continues to point to the same place as before (usually
into a buffer where output from the process was being inserted).
You can delete a process explicitly at any time. Processes are
deleted automatically after they terminate, but not necessarily right
away. If you delete a terminated process explicitly before it is
deleted automatically, no harm results.
User Option:delete-exited-processes
This variable controls automatic deletion of processes that have
terminated (due to calling exit or to a signal). If it is
nil, then they continue to exist until the user runs
list-processes. Otherwise, they are deleted immediately after
they exit.
Function:delete-processname
This function deletes the process associated with name, killing it
with a SIGHUP signal. The argument name may be a process,
the name of a process, a buffer, or the name of a buffer.
This function specifies whether Emacs should query the user if
process is still running when Emacs is exited. If do-query
is nil, the process will be deleted silently.
Otherwise, Emacs will query about killing it.
The value is t if the process was formerly set up to require
query, nil otherwise. A newly-created process always requires
query.
(process-kill-without-query (get-process "shell"))
=> t
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