[Swift-devel] Q about wrapper.sh

[Zhao Zhang]

ahha, I remembered that, also we had a temporary solution some time 
before, right?

zhao

Mihael Hategan wrote:
> I have a feeling we've had this discussion before, but system() invokes
> a subshell (i.e. /bin/bash) to execute your command, and will do all
> kinds of redirection nastiness.
>
> Use fork/execve instead.
>
> On Thu, 2008-10-30 at 18:35 -0500, Zhao Zhang wrote:
>   
>> using system function in c library.
>>
>> zhao
>>
>> Mihael Hategan wrote:
>>     
>>> On Thu, 2008-10-30 at 17:39 -0500, Zhao Zhang wrote:
>>>   
>>>       
>>>> I made a small script with that getarg() part, and tried parse "-if 
>>>> iofiles/DataInit1.txt|iofiles/ApproxData1.txt"
>>>>
>>>> bash-3.1# ./getarg.sh
>>>> iofiles/DataInit1.txt|iofiles/ApproxData1.txt
>>>>
>>>> This output is right, but the same code in wrapper.sh doesn't work like 
>>>> this.
>>>>     
>>>>         
>>> Heh. Not quite. Something in between swift and the wrapper invocation
>>> does funny things when it sees a "|". How does the worker invoke
>>> executables?
>>>
>>>
>>>   
>>>       
>
>
>