2004-11-04 Jakub Jelinek <jakub@redhat.com>

	* libio/ftello.c (ftello): Don't subtract save_end - save_base
	if pos is _IO_pos_BAD.
	* libio/ftello64.c (ftello64): Likewise.
	* libio/iofgetpos.c (_IO_new_fgetpos): Likewise.
	* libio/iofgetpos64.c (_IO_new_fgetpos64): Likewise.
	* libio/oldiofgetpos.c (_IO_old_fgetpos): Likewise.
	* libio/oldiofgetpos64.c (_IO_old_fgetpos64): Likewise.
	* libio/ioftell.c (_IO_ftell): Likewise.
	Cast to long int instead of off_t when checking for overflow.

7 files changed, 18 insertions, 13 deletions

diff --git a/libio/ftello.c b/libio/ftello.c
index 4975a0b..e58daac 100644
--- a/libio/ftello.c
+++ b/libio/ftello.c
@@ -1,4 +1,5 @@
-/* Copyright (C) 1993, 1995-2001, 2002, 2003 Free Software Foundation, Inc.
+/* Copyright (C) 1993, 1995-2001, 2002, 2003, 2004
+   Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -39,7 +40,7 @@ ftello (fp)
   CHECK_FILE (fp, -1L);
   _IO_acquire_lock (fp);
   pos = _IO_seekoff_unlocked (fp, 0, _IO_seek_cur, 0);
-  if (_IO_in_backup (fp))
+  if (_IO_in_backup (fp) && pos != _IO_pos_BAD)
     {
       if (fp->_mode <= 0)
 	pos -= fp->_IO_save_end - fp->_IO_save_base;
diff --git a/libio/ftello64.c b/libio/ftello64.c
index 0275c0c..d39fc2d 100644
--- a/libio/ftello64.c
+++ b/libio/ftello64.c
@@ -1,4 +1,5 @@
-/* Copyright (C) 1993, 1995-2001, 2002, 2003 Free Software Foundation, Inc.
+/* Copyright (C) 1993, 1995-2001, 2002, 2003, 2004
+   Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -40,7 +41,7 @@ ftello64 (fp)
   CHECK_FILE (fp, -1L);
   _IO_acquire_lock (fp);
   pos = _IO_seekoff_unlocked (fp, 0, _IO_seek_cur, 0);
-  if (_IO_in_backup (fp))
+  if (_IO_in_backup (fp) && pos != _IO_pos_BAD)
     {
       if (fp->_mode <= 0)
 	pos -= fp->_IO_save_end - fp->_IO_save_base;
diff --git a/libio/iofgetpos.c b/libio/iofgetpos.c
index aff39bb..8b7ef9f 100644
--- a/libio/iofgetpos.c
+++ b/libio/iofgetpos.c
@@ -1,4 +1,5 @@
-/* Copyright (C) 1993, 1995-2001, 2002, 2003 Free Software Foundation, Inc.
+/* Copyright (C) 1993, 1995-2001, 2002, 2003, 2004
+   Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -40,7 +41,7 @@ _IO_new_fgetpos (fp, posp)
   CHECK_FILE (fp, EOF);
   _IO_acquire_lock (fp);
   pos = _IO_seekoff_unlocked (fp, 0, _IO_seek_cur, 0);
-  if (_IO_in_backup (fp))
+  if (_IO_in_backup (fp) && pos != _IO_pos_BAD)
     {
       if (fp->_mode <= 0)
 	pos -= fp->_IO_save_end - fp->_IO_save_base;
diff --git a/libio/iofgetpos64.c b/libio/iofgetpos64.c
index be224ca..1044685 100644
--- a/libio/iofgetpos64.c
+++ b/libio/iofgetpos64.c
@@ -1,4 +1,5 @@
-/* Copyright (C) 1993, 1995-2001, 2002, 2003 Free Software Foundation, Inc.
+/* Copyright (C) 1993, 1995-2001, 2002, 2003, 2004
+   Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -41,7 +42,7 @@ _IO_new_fgetpos64 (fp, posp)
   CHECK_FILE (fp, EOF);
   _IO_acquire_lock (fp);
   pos = _IO_seekoff_unlocked (fp, 0, _IO_seek_cur, 0);
-  if (_IO_in_backup (fp))
+  if (_IO_in_backup (fp) && pos != _IO_pos_BAD)
     {
       if (fp->_mode <= 0)
 	pos -= fp->_IO_save_end - fp->_IO_save_base;
diff --git a/libio/ioftell.c b/libio/ioftell.c
index b991ef6..03e5f28 100644
--- a/libio/ioftell.c
+++ b/libio/ioftell.c
@@ -1,4 +1,5 @@
-/* Copyright (C) 1993,1995-2000,2001,2002,2003 Free Software Foundation, Inc.
+/* Copyright (C) 1993, 1995-2000, 2001, 2002, 2003, 2004
+   Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -38,7 +39,7 @@ _IO_ftell (fp)
   CHECK_FILE (fp, -1L);
   _IO_acquire_lock (fp);
   pos = _IO_seekoff_unlocked (fp, 0, _IO_seek_cur, 0);
-  if (_IO_in_backup (fp))
+  if (_IO_in_backup (fp) && pos != _IO_pos_BAD)
     {
       if (_IO_vtable_offset (fp) != 0 || fp->_mode <= 0)
 	pos -= fp->_IO_save_end - fp->_IO_save_base;
@@ -52,7 +53,7 @@ _IO_ftell (fp)
 #endif
       return -1L;
     }
-  if ((_IO_off64_t) (off_t) pos != pos)
+  if ((_IO_off64_t) (long int) pos != pos)
     {
 #ifdef EOVERFLOW
       __set_errno (EOVERFLOW);
diff --git a/libio/oldiofgetpos.c b/libio/oldiofgetpos.c
index fbac21b..6b14e19 100644
--- a/libio/oldiofgetpos.c
+++ b/libio/oldiofgetpos.c
@@ -42,7 +42,7 @@ _IO_old_fgetpos (fp, posp)
   CHECK_FILE (fp, EOF);
   _IO_acquire_lock (fp);
   pos = _IO_seekoff_unlocked (fp, 0, _IO_seek_cur, 0);
-  if (_IO_in_backup (fp))
+  if (_IO_in_backup (fp) && pos != _IO_pos_BAD)
     pos -= fp->_IO_save_end - fp->_IO_save_base;
   _IO_release_lock (fp);
   if (pos == _IO_pos_BAD)
diff --git a/libio/oldiofgetpos64.c b/libio/oldiofgetpos64.c
index 996ad20..1c1adb3 100644
--- a/libio/oldiofgetpos64.c
+++ b/libio/oldiofgetpos64.c
@@ -43,7 +43,7 @@ _IO_old_fgetpos64 (fp, posp)
   CHECK_FILE (fp, EOF);
   _IO_acquire_lock (fp);
   pos = _IO_seekoff_unlocked (fp, 0, _IO_seek_cur, 0);
-  if (_IO_in_backup (fp))
+  if (_IO_in_backup (fp) && pos != _IO_pos_BAD)
     pos -= fp->_IO_save_end - fp->_IO_save_base;
   _IO_release_lock (fp);
   if (pos == _IO_pos_BAD)