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Re: How to capture error in Cygwin, $? is not working


Hi Corinna & all,

Thanks for the advise. I got it! :)

Cheers,

Lian



Corinna Vinschen-2 wrote:
> 
> On Mar 12 23:09, nlian wrote:
>> 
>> Hi,
>> 
>> I want to write a simple script to start and stop windows service
>> remotely.
>> Here is the script:
>> 
>> #!/usr/bin/bash
>> sc \\\\servername start "MyService"
>> echo $?
>> 
>> =======
>> The above script return the following messages: 
>> [SC] StartService: OpenService FAILED 1060:
>> 
>> The specified service does not exist as an installed service.
>> 
>> 0
>> =======
>> 
>> What I don't understand is why $? return 0 and not 1060 or any other
>> error code. I want to capture the error code returned from windows
>> program
>> How to do this in Cygwin? Please advise.
> 
> What you get is the exit value from the sc command.  Sc returns 0.  What
> sc prints is the error code it got from the service manager API.  It's a
> pity that sc doesn't return a useful exit code but there's nothing
> Cygwin can do about the exit codes of Windows tools.
> 
> `net start MyService' returns an exit code of 2, Cygwin's
> `cygrunsrv -S MyService' returns 1.  Unfortunately both tools are not
> capabale to start services on a remote server.
> 
> What you can do is something along the lines of
> 
>   sc \\\\servername start "MyService" | grep -q START
>   echo $?
>   1
> 
> Nothing keeps you from evaluating the output of the sc command
> in any elaborate way you can think of.  Think grep, sed, awk, ...
> 
> 
> Corinna
> 
> -- 
> Corinna Vinschen                  Please, send mails regarding Cygwin to
> Cygwin Project Co-Leader          cygwin AT cygwin DOT com
> Red Hat
> 
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