mrkn	2017-12-12 18:00:17 +0900 (Tue, 12 Dec 2017)

  New Revision: 61143

  https://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=61143

  Log:
    process.c: add Process.last_status
    
    * process.c (proc_s_last_status): add Process.last_status
      [ruby-core:83514] [Feature #14043]
    
    * test/ruby/test_process.rb (test_last_status): add a test case for
      Process.last_status.

  Modified files:
    trunk/process.c
    trunk/test/ruby/test_process.rb
Index: process.c
===================================================================
--- process.c	(revision 61142)
+++ process.c	(revision 61143)
@@ -472,6 +472,27 @@ rb_last_status_get(void) https://github.com/ruby/ruby/blob/trunk/process.c#L472
     return GET_THREAD()->last_status;
 }
 
+/*
+ *  call-seq:
+ *     Process.last_status   -> Process::Status
+ *
+ *  Return the status of the last executed child process in the
+ *  current thread.
+ *
+ *     Process.wait Process.spawn("ruby", "-e", "exit 13")
+ *     Process.last_status   #=> #<Process::Status: pid 4825 exit 13>
+ *
+ *  If no child process has never been executed in the current
+ *  thread, this returns +nil+.
+ *
+ *     Process.last_status   #=> nil
+ */
+static VALUE
+proc_s_last_status(VALUE mod)
+{
+  return rb_last_status_get();
+}
+
 void
 rb_last_status_set(int status, rb_pid_t pid)
 {
@@ -7600,6 +7621,7 @@ InitVM_process(void) https://github.com/ruby/ruby/blob/trunk/process.c#L7621
     rb_define_singleton_method(rb_mProcess, "exit!", rb_f_exit_bang, -1);
     rb_define_singleton_method(rb_mProcess, "exit", rb_f_exit, -1);
     rb_define_singleton_method(rb_mProcess, "abort", rb_f_abort, -1);
+    rb_define_singleton_method(rb_mProcess, "last_status", proc_s_last_status, 0);
 
     rb_define_module_function(rb_mProcess, "kill", rb_f_kill, -1); /* in signal.c */
     rb_define_module_function(rb_mProcess, "wait", proc_wait, -1);
Index: test/ruby/test_process.rb
===================================================================
--- test/ruby/test_process.rb	(revision 61142)
+++ test/ruby/test_process.rb	(revision 61143)
@@ -2352,4 +2352,9 @@ EOS https://github.com/ruby/ruby/blob/trunk/test/ruby/test_process.rb#L2352
       end
     end
   end
+
+  def test_last_status
+    Process.wait spawn(RUBY, "-e", "exit 13")
+    assert_same(Process.last_status, $?)
+  end
 end

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