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Re: rpm check script problem



"exec 9<$filename"  means "redirect file to fd9, without dealing with fd0".

2006/10/9, Tony Nelson <tonynelson georgeanelson com>:
At 11:46 PM +0800 10/9/06, ???? wrote:

>2006/10/9, Dan Track <dan track gmail com>:
>> Hi
>>
>> I've got a script that should check which rpms are installed on the
>> system. Part of the script involves using file descriptors. I'm having
>> trouble understanding these file descriptors and was hoping someone
>> can clarify my mistake. As a simple script I wrote the following:
>>
>> #!/bin/bash
>> $filename=$1
>> $filename1=$2
>>
>> exec 9<&0 < $filename

>The line in the script "exec 9<&0 <$filename" means "first copy fd0 to
>fd9, then redirect file to fd0", so in the following lines of the
>script fd9 is always the stdin.

According to the Wikipedia link

    exec 9<$filename

seems more likely.
--
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TonyN.:'    The Great Writ     <mailto:tonynelson georgeanelson com>
      '      is no more.             <http://www.georgeanelson.com/>

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