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Re: looking for packages versions of running daemons



On Thu, Sep 10, 2009 at 11:33 PM, Cameron Hutchison <lists@xdna.net> wrote:
> Javier Barroso <javibarroso@gmail.com> writes:
>
>>> is this "xargs: echo: terminated by signal 13" the output it should be?
>>Probably, substituting:
>
>> bin=$(xargs -n 1 -0 echo < /proc/$pid/cmdline | awk '{print $1 ; exit}')
>
>>with
>
>>bin=$(awk '{print $1; exit}' /proc/$pid/cmdline)
>
>>will solved the issue
>
>>But I'm not sure why Cameron used xargs in this case.
>
> /proc/pid/cmdline usually has ASCII NUL separated fields, which awk does
> not split, so usually you have to use xargs -0. I noticed some cases
> where the args were space separated (perl script), so I needed awk for
> that case. I'll look more into awk and see if it can handle NULs in
> some way. It doesn't by default.
Ok, I didn't know that. Thank you for the explication

awk -F '\000' '{print $1;exit}' /proc/$pid/cmdline

do the trick then

Regards,


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