PATCH: Fix ARM problem with freopen

[Jeff Johnston]

Patch checked in.   Thanks.

-- Jeff J.

Mark Mitchell wrote:

>Jeff --
>
>I'd like to commit the attached patch to newlib.
>
>The problem was that the current version of remap_handle did not work
>correctly when a standard stream (such as "stdin") was reopend with
>"freopen".  Because "open" cleverly keeps the descriptors for the
>standard streams and all other descriptors separate, we can just check
>"STDIN_FILENO" instead.
>
>OK?
>
>--
>Mark Mitchell
>CodeSourcery, LLC
>mark@codesourcery.com
>
>2003-12-29  Mark Mitchell  <mark@codesourcery.com>
>
>	* libc/sys/arm/syscalls.c (unistd.h): Include it.
>	(remap_handle): Use STDIN_FILENO instead of __sfileno(stdin).
>	Similarly for stdout and stderr.
>
>Index: libc/sys/arm/syscalls.c
>===================================================================
>RCS file: /cvs/src/src/newlib/libc/sys/arm/syscalls.c,v
>retrieving revision 1.8
>diff -c -5 -p -r1.8 syscalls.c
>*** libc/sys/arm/syscalls.c	6 May 2002 20:46:37 -0000	1.8
>--- libc/sys/arm/syscalls.c	29 Dec 2003 21:07:24 -0000
>***************
>*** 10,19 ****
>--- 10,20 ----
>  #include <time.h>
>  #include <sys/time.h>
>  #include <sys/times.h>
>  #include <errno.h>
>  #include <reent.h>
>+ #include <unistd.h>
>  #include "swi.h"
>  
>  /* Forward prototypes.  */
>  int     _system     _PARAMS ((const char *));
>  int     _rename     _PARAMS ((const char *, const char *));
>*************** remap_handle (int fh)
>*** 123,137 ****
>         CHECK_INIT(stdin);
>         CHECK_INIT(stdout);
>         CHECK_INIT(stderr);
>         std_files_checked = 1;
>      }
>!   if (fh == __sfileno (stdin))
>      return monitor_stdin;
>!   if (fh == __sfileno (stdout))
>      return monitor_stdout;
>!   if (fh == __sfileno (stderr))
>      return monitor_stderr;
>  
>    return fh - FILE_HANDLE_OFFSET;
>  }
>  
>--- 124,138 ----
>         CHECK_INIT(stdin);
>         CHECK_INIT(stdout);
>         CHECK_INIT(stderr);
>         std_files_checked = 1;
>      }
>!   if (fh == STDIN_FILENO)
>      return monitor_stdin;
>!   if (fh == STDOUT_FILENO)
>      return monitor_stdout;
>!   if (fh == STDERR_FILENO)
>      return monitor_stderr;
>  
>    return fh - FILE_HANDLE_OFFSET;
>  }
>  
>  
>