@node freopen
@section @code{freopen}
@findex freopen

POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/functions/freopen.html}

Gnulib module: freopen

Portability problems fixed by Gnulib:
@itemize
@item
On Windows platforms (excluding Cygwin), this function does usually not
recognize the @file{/dev/null} filename.
@end itemize

Portability problems not fixed by Gnulib:
@itemize
@item
On Windows platforms (excluding Cygwin), this function does not set @code{errno}
upon failure.
@item
This function does not fail when the file name argument ends in a slash
and (without the slash) names a nonexistent file or a file that is not a
directory, on some platforms:
HP-UX 11.00, Solaris 9, Irix 5.3.
@item
Applications should not assume that @code{fileno(f)} will be the same
before and after a call to @code{freopen(name,mode,f)}.  However, the
module freopen-safer can at least protect @code{stdin}, @code{stdout},
and @code{stderr}.
@end itemize