* rubysig.h (TRAP_BEG, TRAP_END): safe errno around CHECK_INTS.

  (backported from CVS HEAD)  [ruby-dev:24993]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_8@7472 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 4 insertions, 1 deletions

diff --git a/rubysig.h b/rubysig.h
index 8871e3aa03..fd43e85d28 100644
--- a/rubysig.h
+++ b/rubysig.h
@@ -46,10 +46,13 @@ typedef int rb_atomic_t;
 # define ATOMIC_DEC(var) (--(var))
 
 # define TRAP_BEG do {\
+    int saved_errno = 0;\
     int trap_immediate = rb_trap_immediate;\
     rb_trap_immediate = 1
 # define TRAP_END rb_trap_immediate = trap_immediate;\
-  CHECK_INTS;\
+    saved_errno = errno;\
+    CHECK_INTS;\
+    errno = saved_errno;\
 } while (0)
 
 # define RUBY_CRITICAL(statements) do {\