Javier Barroso <[email protected]> writes:
>On Thu, Sep 10, 2009 at 11:33 PM, Cameron Hutchison <[email protected]> wrote:
>>
>> /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
Well, no that does not handle the case where there are spaces separating
the fields. This was the case with one process in particular on my
system.
If gawk is installed I could do
gawk -F '[ \000]' '{print $1; exit}'
But that doesn't work with mawk, which is the default awk on Debian:
$ awk -F '[ \000]' '{print $1}' < /proc/1663/cmdline
awk: line 0: regular expression compile failed (bad class -- [], [^] or [)
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