+
−@node stdin
+
−@section @code{stdin}
+
−@findex stdin
+
−
+
−POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/functions/stdin.html}
+
−
+
−Gnulib module: ---
+
−
+
−Portability problems fixed by Gnulib:
+
−@itemize
+
−@end itemize
+
−
+
−Portability problems not fixed by Gnulib:
+
−@itemize
+
−@item
+
−stdin is created in 32-bit mode instead of 64-bit mode: Cygwin 1.5.x.
+
−One workaround is to use freopen(NULL, ``r'', stdin) on Cygwin 1.5.21
+
−or newer.  Another is to use the gnulib ftello module and do
+
−ftello(stdin).
+
−@item
+
−POSIX states that a setuid application can guarantee that fd 0 is
+
−open, but some systems guarantee this even for non-setuid programs.
+
−If an application is executed with fd 0 closed, use of @code{stdin}
+
−can affect an unrelated file that happened to be assigned to fd 0.
+
−The gnulib *-safer modules may be used to guarantee that fd 0 stays
+
−reserved for @code{stdin}.
+
−@end itemize