Re: which is the best command to use

[Tony Baldwin <tonybaldwin@gmx.com>]

On Tue, Dec 27, 2011 at 09:11:45PM +0800, lina wrote:
> On Tuesday 27,December,2011 08:57 PM, lina wrote:
> >Hi,
> >
> >I have two questions, wish to get advice,
> >
> >Question 1:
> >
> >For a series of files:
> >
> >cat  a_*.o* | grep "WARNING"
> >
> >some file like a_1.o12 has WARNING, but others does not have WARNING
> >
> >How can I let grep returns the filename?
> 
> I wrote a very-low-level and not-work-as-expected one,
> 
> #!/bin/sh
> 
> for filename in *.o*
> 
> do
> #echo $filename
> a= cat $filename | grep "WARNING"
>         if [ a ]
>         then
>                 echo $filename
>         fi
> 
> done
> 

for filename in *.o*; do
if [ grep "WARNING" ]; 
	then echo $filename
fi
done

./tony

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All Tony, all the time!