Hello,

I'm receiving strange results with reading stdin on Windows 7. Consider this code:

module test;

import std.stdio;

void main(string[] args)
{
         foreach (int i, string line; lines(stdin))
         {
                 write(line);
         }
}

On Linux, if I do 'cat test.d | ./test' I get test.d contents on stdout. But on Windows 7, ('type test.d | ./test.exe') the output is this:

std.stdio.StdioException: Bad file descriptor
module test;

import std.stdio;

void main(string[] args)
{
         foreach (int i, string line; lines(stdin))
         {
                 writef(line);
         }
}

So I too get type.d contents on stdout, but preceeded by StdioException string. This happens with dmd 2.047 and 2.048.

Is this my error, dmd's, or Windows's piping?
-- 

Stanislav Blinov Wrote:

>   Hello,
> 
> I'm receiving strange results with reading stdin on Windows 7. Consider this code:
> 
> module test;
> 
> import std.stdio;
> 
> void main(string[] args)
> {
>          foreach (int i, string line; lines(stdin))
>          {
>                  write(line);
>          }
> }
> 
> On Linux, if I do 'cat test.d | ./test' I get test.d contents on stdout. But on Windows 7, ('type test.d | ./test.exe') the output is this:
> 
> std.stdio.StdioException: Bad file descriptor
> module test;
> 
> import std.stdio;
> 
> void main(string[] args)
> {
>          foreach (int i, string line; lines(stdin))
>          {
>                  writef(line);
>          }
> }
> 
> So I too get type.d contents on stdout, but preceeded by StdioException string. This happens with dmd 2.047 and 2.048.
> 
> Is this my error, dmd's, or Windows's piping?
> -- 

In my experience Windows hasn't gotten piping right. And it has been known to have bugs, this might be related: http://stackoverflow.com/questions/466801/python-piping-on-windows-why-does-this-not-work

 18.08.2010 17:54, Jesse Phillips wrote:
> In my experience Windows hasn't gotten piping right. And it has been known to have bugs, this might be related: http://stackoverflow.com/questions/466801/python-piping-on-windows-why-does-this-not-work
Thanks, I'll take a look at that.
-- 

	

I experience the exact same problem on Windows 7 64-bit.

> import std.stdio;
>
> int main() {
>     char[] buf;
>     while (stdin.readln(buf))
>         write(buf);
>     return 0;
> }

If compiled as "test.exe", running the following command:

> echo "test line 1" | test

Produces the following result:

> std.stdio.StdioException: Bad file descriptor
> "test line 1"
>