Function SharedFileSetDeleteOnProcExit

src/backend/storage/file/sharedfileset.c:266–284

* Callback function that will be invoked on the process exit. This will * process the list of all the registered sharedfilesets and delete the * underlying files. */

 * underlying files.
 */
static void
SharedFileSetDeleteOnProcExit(int status, Datum arg)
{
	/*
	 * Remove all the pending shared fileset entries. We don't use foreach()
	 * here because SharedFileSetDeleteAll will remove the current element in
	 * filesetlist. Though we have used foreach_delete_current() to remove the
	 * element from filesetlist it could only fix up the state of one of the
	 * loops, see SharedFileSetUnregister.
	 */
	while (list_length(filesetlist) > 0)
	{
		SharedFileSet *fileset = (SharedFileSet *) linitial(filesetlist);

		SharedFileSetDeleteAll(fileset);
	}

	filesetlist = NIL;
}

/*
 * Unregister the shared fileset entry registered for cleanup on proc exit.