openssh unix dev - Sep 2002 - ssh and popen-- broken pipe

Hi,

My application uses popen to execute UNIX commands.   After I replace rsh
with ssh,  it stopped working.  I have made a test C code to reproduce the
problem as attached in this email.  In the test program, I called popen for
ssh command and then pclose right away.  I got  the following error:

kirk 588$ a.out
Write failed flushing stdout buffer.
write stdout: Broken pipe

Any idea what is going on.  If I call popen with some other commands, it
runs fine.

One more thing worth metioning here is even with ssh, my application was
fine last month on another machine.  Unfortunately, that machine was taken
off the lease and I and trying to trace done the ssh version information.

Thanks in advance.

(See attached file: test_ssh.c)

Ling Pan
309-494-2155 ( tie line 7-724-2155)
Mechanical Analysis Group
Caterpillar Inc.
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On Fri, 2002-09-20 at 03:21, Lingyun Pan wrote:
> Hi,
> 
> My application uses popen to execute UNIX commands.   After I replace rsh
> with ssh,  it stopped working.  I have made a test C code to reproduce the
> problem as attached in this email.  In the test program, I called popen for
> ssh command and then pclose right away.  I got  the following error:
Try "ssh -v blah 2>&1" as your command so you get debugging
output over
the pipe. Alternately have a look as how sftp.c executes ssh for a way
which preserves console access (for reading passphrases, etc) and
debugging output.

-d