yugui	2008-12-25 18:58:18 +0900 (Thu, 25 Dec 2008)

  New Revision: 21041

  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=rev&revision=21041

  Log:
    merges r20990 from trunk into ruby_1_9_1.
    * io.c (rb_io_initialize): check fd validity.  [ruby-dev:36646]

  Modified files:
    branches/ruby_1_9_1/ChangeLog
    branches/ruby_1_9_1/io.c

Index: ruby_1_9_1/ChangeLog
===================================================================
--- ruby_1_9_1/ChangeLog	(revision 21040)
+++ ruby_1_9_1/ChangeLog	(revision 21041)
@@ -1,3 +1,7 @@
+Thu Dec 25 17:06:13 2008  Tanaka Akira  <akr@f...>
+
+	* io.c (rb_io_initialize): check fd validity.  [ruby-dev:36646]
+
 Thu Dec 25 16:23:31 2008  Tanaka Akira  <akr@f...>
 
 	* io.c (flush_before_seek): check io_fflush result.
Index: ruby_1_9_1/io.c
===================================================================
--- ruby_1_9_1/io.c	(revision 21040)
+++ ruby_1_9_1/io.c	(revision 21041)
@@ -5898,6 +5898,7 @@
     int fd, fmode, oflags = O_RDONLY;
     convconfig_t convconfig;
     VALUE opt;
+    struct stat st;
 
     rb_secure(4);
 
@@ -5906,6 +5907,7 @@
     rb_io_extract_modeenc(&vmode, 0, opt, &oflags, &fmode, &convconfig);
 
     fd = NUM2INT(fnum);
+    if (fstat(fd, &st) == -1) rb_sys_fail(0);
     UPDATE_MAXFD(fd);
     if (NIL_P(vmode)) {
 #if defined(HAVE_FCNTL) && defined(F_GETFL)

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