From 42cff90a2913ba460a51686f5872835cbde7c335 Mon Sep 17 00:00:00 2001
From: nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Thu, 25 Oct 2007 05:19:33 +0000
Subject: * io.c (rb_io_tell, rb_io_seek): check errno too.  [ruby-dev:32093]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_8@13774 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 io.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

(limited to 'io.c')

diff --git a/io.c b/io.c
index 8f8dfcdf2e..088b678c51 100644
--- a/io.c
+++ b/io.c
@@ -245,6 +245,7 @@ flush_before_seek(fptr)
     if (fptr->mode & FMODE_WBUF) {
 	io_fflush(GetWriteFile(fptr), fptr);
     }
+    errno = 0;
     return fptr;
 }
 
@@ -668,7 +669,7 @@ rb_io_tell(io)
 
     GetOpenFile(io, fptr);
     pos = io_tell(fptr);
-    if (pos < 0) rb_sys_fail(fptr->path);
+    if (pos < 0 && errno) rb_sys_fail(fptr->path);
     return OFFT2NUM(pos);
 }
 
@@ -683,7 +684,7 @@ rb_io_seek(io, offset, whence)
     pos = NUM2OFFT(offset);
     GetOpenFile(io, fptr);
     pos = io_seek(fptr, pos, whence);
-    if (pos < 0) rb_sys_fail(fptr->path);
+    if (pos < 0 && errno) rb_sys_fail(fptr->path);
     clearerr(fptr->f);
 
     return INT2FIX(0);
-- 
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