- Reworked the __putc() and putc() macros to reference the 'c' input

parameter only once, and to be free of side-effects when tinkering
  with the buffer position.

- isatty() had the __fd_lock() call in the wrong place, which could have
  led to cleanup problems later.

- The close action in the stdio, socket and termios hook code now
  also zaps the fd pointer itself after cleaning up the file descriptor
  table entry.


git-svn-id: file:///Users/olsen/Code/migration-svn-zu-git/logical-line-staging/clib2/trunk@15211 87f5fb63-7c3d-0410-a384-fd976d0f7a62

library/unistd_isatty.c

@@ -1,5 +1,5 @@
 /*
- * $Id: unistd_isatty.c,v 1.10 2008-04-16 07:46:05 obarthel Exp $
+ * $Id: unistd_isatty.c,v 1.11 2010-10-20 13:12:59 obarthel Exp $
  *
  * :ts=4
  *
@@ -67,14 +67,14 @@ isatty(int file_descriptor)
 		goto out;
 	}
 
+	__fd_lock(fd);
+
 	if(FLAG_IS_SET(fd->fd_Flags,FDF_IS_SOCKET))
 	{
 		__set_errno(ENOTTY);
 		goto out;
 	}
 
-	__fd_lock(fd);
-
 	result = 1;
 
 	if(FLAG_IS_CLEAR(fd->fd_Flags,FDF_IS_INTERACTIVE))