akr	2012-08-29 22:02:45 +0900 (Wed, 29 Aug 2012)

  New Revision: 36848

  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=rev&revision=36848

  Log:
    * process.c (rb_f_system): check failures of waitpid.
      [ruby-talk:398687]

  Modified files:
    trunk/ChangeLog
    trunk/process.c

Index: ChangeLog
===================================================================
--- ChangeLog	(revision 36847)
+++ ChangeLog	(revision 36848)
@@ -1,3 +1,8 @@
+Wed Aug 29 22:01:15 2012  Tanaka Akira  <akr@f...>
+
+	* process.c (rb_f_system): check failures of waitpid.
+	  [ruby-talk:398687]
+
 Wed Aug 29 15:03:04 2012  Nobuyoshi Nakada  <nobu@r...>
 
 	* configure.in (LIBDIR_BASENAME): use configured libdir value to fix
Index: process.c
===================================================================
--- process.c	(revision 36847)
+++ process.c	(revision 36848)
@@ -3661,7 +3661,10 @@
     pid = rb_spawn_internal(argc, argv, NULL, 0);
 #if defined(HAVE_FORK) || defined(HAVE_SPAWNV)
     if (pid > 0) {
-	rb_syswait(pid);
+        int ret, status;
+        ret = rb_waitpid(pid, &status, 0);
+        if (ret == (rb_pid_t)-1)
+            rb_sys_fail("Another thread waited the process started by system().");
     }
 #endif
 #ifdef SIGCHLD

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