* include/ruby/intern.h, thread_pthread.c (rb_reserved_fd_p,

  RB_RESERVED_FD_P): added.  This C API is to limit to access
  fds which are used by RubyVM internal.  In this version of
  CRuby, return 1 if fd is communication pipe.
  If your application needs to close all file descriptors to
  preent resource leak, skip internal fds using this C API.
  We also define a macro RB_RESERVED_FD_P(fd).  So you can write
  #ifndef RB_RESERVED_FD_P
  #define RB_RESERVED_FD_P(fd) 0
  #endif
  for Ruby 1.9.2 or previous version to write compatible extensions.
  See [ruby-core:37727]
* thread_win32.c (rb_reserved_fd_p): added (return 0 for any fds).
* io.c (rb_io_initialize): raise ArgumentError if given fd is reserved by Ruby.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@32394 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 3 insertions, 0 deletions

diff --git a/io.c b/io.c
index 7900ab6638..e5372aa820 100644
--- a/io.c
+++ b/io.c
@@ -6517,6 +6517,9 @@ rb_io_initialize(int argc, VALUE *argv, VALUE io)
     rb_io_extract_modeenc(&vmode, 0, opt, &oflags, &fmode, &convconfig);
 
     fd = NUM2INT(fnum);
+    if (rb_reserved_fd_p(fd)) {
+	rb_raise(rb_eArgError, "The given fd is not accessible because RubyVM reserves it");
+    }
 #if defined(HAVE_FCNTL) && defined(F_GETFL)
     oflags = fcntl(fd, F_GETFL);
     if (oflags == -1) rb_sys_fail(0);