[wpkg-users] winexe and EPOLL_CTL_ADD error

[Malte Starostik]

Am Dienstag, 15. März 2011, 18:53:30 schrieb Maurizio Marini Gmail:
> i can run winexe interactively without any problem and then i can exec
> wpkg.js, but as i run it into a shell script as this one:
> http://wpkg.org/WPKG_with_winexe
> i get tevent: EPOLL_CTL_ADD failed (Operation not permitted) - falling
> back to select()
> 

> this is a very small script that runs winexe:
> cat lancia.sh
> #! /bin/bash -xv
> /usr/local/bin/winexe   -U "DOMAIN\Administrator%password"
> //192.168.20.50 cmd.exe <<EOF
> exit
> EOF

> if i run it by shell:
> tevent: EPOLL_CTL_ADD failed (Operation not permitted) - falling back
> to select()
> 
> 
> Aborting...
For whatever (annoying) reason, winexe doesn't work with a pipe on stdin 
(maybe also stdout, sorry, I'm writing this from memory now).  In your case, 
the here document causes the shell to use such a pipe.  I run into this time 
and again when trying to do things like

command_that_outputs_a_list_of_hostnames | \
    while read host; do
        winexe //$host ...;
    done

This similar loop works:

for host in $(command_that...); do \
    winexe //$host ...; \
done

But the former version is nicer when command_that_... is something complex.  
Redirecting winexe's stdin/out from/to a tty solves the problem.  To feed 
input into whatever you run on the remote machine, you'd need to allocate a 
pty somehow and get your input through it.  I guess socat (http://www.dest-
unreach.org/socat/) can help you with this.
A simpler alternative might be to get your input onto the target machine e.g. 
by dynamically creating a .cmd file and upload it via the admin$ share and 
then just execute that .cmd file, leaving stdin/out alone.  I never tried to 
use winexe from a cron job or a similar call site, but in that case - no tty - 
you could possibly get away with explicitly redirecting from/to *any* tty you 
have permission to access.  Again, socat comes to mind.

> 
> if i run it interactively:
> 
> 17:11:20 root at fisico: ~/scripts # /usr/local/bin/winexe   -U
> "DOMAIN\Administrator%password" //192.168.20.50 cmd.exe
> Microsoft Windows XP [Versione 5.1.2600]
> (C) Copyright 1985-2001 Microsoft Corp.
> 
> C:\WINDOWS\system32>
In this case, winexe's stdin/out are connected to a tty. 

> I think that this is something analogue to this link:
> http://fixunix.com/samba/192081-re-samba-4-can-smbd-run-non-interactively.h
> tml

FWIW, I don't really think it's related apart from a similar error message, 
but I'm too lazy right now to check what the fix is about.

Good luck,
Malte