Re: [Myrinet] mpich-gm-1.2.4..8a and IO from STDIN

[email protected] said:
> When running a Fortran program compiled with mpif90 using the Intel 6.0
> compiler, we see a problem with redirected input files in that the
> program will not read. If there is an explicit open, without the
> redirect, this is not an issue.  Testing with mpich-1.2.4 on a non-gm
> host shows no problems.
> 
> The command we use is "mpirun -np 1 test.exe <test.inp" executed on a
> node.
> 
> The output:
> 
> Input/Output Error 174: Illegal seek
> 
>    In Procedure: main program
>         At Line: 12
> 
>       Statement: REWIND
>            Unit: 5
>    Connected To: Stdin
>            Form: Formatted
>          Access: Sequential
> Records Read   : 0
> Records Written: 0
[...]
>       do nid=0,nodesm1
>       if(nid.eq.myid)then
> !     open(unit=5 ,file='test.inp',status='old')
>       rewind 5

While I'm not a heavy FORTRAN programmer, is it not the case that
the REWIND above turns into lseek(5, SEEK_SET, 0)?  It's not good
to seek on a pipe or socket.  Do other FORTRAN libraries hide this
error from the user somehow?

Weird that gm would give you different results, though.  Perhaps you
should send a valid test case with an example "test.inp" file as an
actual bug report to [email protected] and see what they have to say about
it.

		-- Pete