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Re (3): Can awk use `grep`?

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In article <4e082ecd$0$26323$426a74cc@news.free.fr>, Loki Harfagr <l0k1@thedarkdesign.free.fr.INVALID> wrote: 

> Sun, 26 Jun 2011 18:03:47 +0000, no.top.post did cat:
> 
> > In article <iu7414$bnp$1@speranza.aioe.org>, pk <pk@pk.invalid> wrote:
> > 
> >> On Sun, 26 Jun 2011 10:36:52 +0000 (UTC) no.top.post@gmail.com wrote:
> >> 
> >> > I've got two inputs.  Input1 looks like:- 3
> >> > 5
> >> > 7
> >> > 9
> >> > 
> >> > Input2 looks like:-
> >> > 9  pathC
> >> > 3  pathB
> >> > 7  pathA
> >> > 
> >> > I want to get:-
> >> > 3  pathB
> >> > 5
> >> > 7  pathA
> >> > 9  pathC
> >> 
> >> 
> >> With awk, the usual way to do that is:
> >> 
> >> awk 'NR==FNR{a[$1]=$2;next}{print $0, a[$0]}' Input2 Input1
> >> 
> > Thanks, a superficial test looks ok.
> > My real problem is more complex than I described, and I'd like Input2
> > Input1 to be 2 functions: PT DV. So I'm guessing that I'd just use:
> > `PT' `DV`
> > 
> > I too used to be guilty of one-lineism when younger.
> 
> Were you ever younger? Anyway, posting on these groups you may be
> surprised about the age of some posters, now of course there are
> other meanings to 'youth'
> 
> > Too bad for other
> > maintainers - I'm not paid to be a tutor.
> 
> It's so nice we're heavily paid to post on Usenet !
> 
> > {   // the matching conditions
> > are
> > a[$1]  // the 1st field of an entity bound to 'a' =$2  // equals the 2nd
> > fiel of the input line ;    // and also  ??
> > }   // end of matching conditions
> > {  // start action for matching condition/s print $0   // print 1st
> > field of the input line ,   // and
> > print 1st field  <related to> the 'a' entity }'  // end of <awk> except
> > for input args Input2 Input1  // input 2 files in unknown sequence.
> 
> You'd better keep on one-liners if your deployments all go that wrong ;D)
> here's the developed version of pk's post:
> --------
> awk '
> NR==FNR{	a[$1]=$2  //IF AllRcdCnt==CurrentFileRcdCnt
> 		next
> }
> {print $0, a[$0]}  // print the Current Rcd, a[$0]
> ' Input2 Input1
> --------
> 
> If you're really have allergies on using/understanding 'next'
> here's a "nextless" version (to the possible price of RAM use
> and possibly goofs if you data don't follow your initial rules,
> the possible goofs search is left as an exercise to the million
> overpriced paid tutors posting here ;-)
> --------
> awk '
> NR>FNR{print $0,a[$0]}
> {a[$1]=$2}
> ' Input2 Input1
> --------
> 
> > and mind that in any case your assertion:
> >  "input 2 files in unknown sequence."
> > is *wrong*, then if your 'coming soon' 2 "functions" are
> > respectiveley PT for Input2 and DV for Input1, and supposing,
> > yes hust supposing that these "functions" are actually scripts
> > or shell functions, you may have a start with:
> > --------
> > awk '
> > NR>FNR{print $0,a[$0]}
> > {a[$1]=$2}
> > ' <(PT) <(DV)
> > --------
WHILE (#All Rcds Read) > (#Rcds Read CuurentFile)
FNR < NR ==> reading records of the 1st file
?? Define a[$0]

Yes PT & DV *are* shell-functions.
So far I just first save them to pt & dv and then feed these 
2 files in, because I'm overwhelmed with the choas/complexity.

This thing is killing me. It's much bigger than `awk`.
It's about seeing immediately where each of 20 odd terminals'
paths are.  This SAME awk-task demonstrates WHY *you* need 
such a facility. THIS task needs terminals 1 to test PT, 2 to test DV,
3 to make notes, 4 to read the NewsArticle, 5 to compare 
previous notes ..6, 7.

So if you've got 2 or 3 projects going, you need 20 odd terminals.
That's why I compared it with a factory in my previous article.

I mentioned the tutorial aspect vs. throwing-out one-liners.
There's a 3rd level:
1. a specific awk query.
2. passing on general knowledge about awk.
3. colaboratively building a tool which is of value to the
 whole linux community.

The tool that I built for old Mandrake9+kde was very
valuable, but it doesn't work with my newer systems.
New kde is a monster, and `pstree -p` for xfce doesn't draw
a 'tree' with a node for each Desktop, like my old one did.

Since you've got competence and enthusiasm, you'd be
interested in looking at this tool.

= set up a number of terminals with some app. I use `mc` 
because it can navigate the dir & view/edit/copy/move... 
But `top`would probably do 'as a tracer'.

I use:--   [this is where all the terminals needed starts !!]
/usr/local/sbin/PT ==
lsof | grep DIR | grep mc | grep "/".  | cut -b-17,67- |\
awk '{print $1 " " $2 " " $4}'

exit
------------> I end my scripts with `exit`because I keep 
notes below. You can use different/better methods to 
<order the pid/s of each `mc` & show its 'path'>

PT gives me a list of all `mc` with their <path> and pid.
And `DV1`, gives me the <list of pid/S arranged/ordered 
so that I can work-out/see which (desktop,terminal) the 
pid has. 

/usr/local/sbin/DV1 ==
# echo 'replace braket/s with space, as field separator'
DV | tr /\(/ /" "/ | tr /\)/ /" "/  |\

# echo 'discard fields 5,6'
awk 'FS=" " {print $1 " " $2 " " $3 " " $4}'  > dv1

cat dv1

# instead of field4 print line in PT 'matching' $4
#awk 'FS=" " {print $1 " " $2 " " $3 " " `grep $4   -f `PT` `}'
# can't do `grep` inside `awk`

exit
---------------DV ==
pstree -p |\
gawk '/Terminal/ { print $0 }
# this 1st line has NOspaceTab
       /bash/ { print $2 }'
# gawk matching action
exit
---------------> PT gives me:--
mc 3481 /mnt/p14/usr/local/bin
mc 3487 /usr/local/sbin
mc 3502 /mnt/p11/April2010
...
mc 4048 /mnt/p14/tmp
mc 4299 /mnt/hd/wily-0.13.42/misc

---> and DV1 gives me:--
|-bash 3463 ---linux.oberon.no <- 3479
|-bash 3464 ---mc <- 3481
|-bash 3465  
|-bash 3466 ---mc 4299
...
|-bash 3466 ---mc 4299
|-bash 3467 ---mc 3502
|-bash 3468 ---mc 3506
...

---> and the last/$5 [I think] field of DV
matches the $2 of PT. That's the pid.

---> so If you can construct:-
3463 linux.oberon.no 3479 <not `mc` type>
3464 mc 3481 /mnt/p14/usr/local/bin
3465  
3466 mc 4299 /mnt/hd/wily-0.13.42/misc
...
--> then when you want to 'access' <wily>, you know
 that it's at 3 terminals beyond `linux.oberon.no` @
Desktop1, Terminal1 + 3 = Desktop1, Terminal4,
in my case, where Deskto1 has [currently] 4 terminals.

Give a man a fish and you've fed him for one day.
Teach him to fish and you've fed him for life.

== TIA.

PS, I've just discovered that:
 if you `pstree -p`
and select the indicated 'pid' of some proccess;
then the last-field of the 1st-record of
lsof | grep <pid> 
  contains the <path of pid> !!
There are possible suprious results from `grep <pid>`,
which can be removed if you <grep only the 2nd-field>.
Which seems like a job for `awk`.  So:
Show me the records with 'pid = 3481'
=> gawk '$2=3481` <(lsof)
  and
=> lsof | gawk '$2=2030`
 both generate a MASS of garbage, as if "gawk 2030"
is generating its own records in `lsof` which are shown.

In this case [where there are no other records containing
2030 as a non-pid in `lsof`] 
lsof | grep | awk 'NR=1{print $9}
shows ALL the <paths>
Whereas I expected "NR=1" to pass only the 1st record.

PSS. this was written on different computers, with
diffferent versions of linux.
Knowledge which can't be developed over time,
is just instant twitter-crap.

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Thread

Re (2): Can awk use `grep`? no.top.post@gmail.com - 2011-06-26 18:03 +0000
  Re: Re (2): Can awk use `grep`? Bill Marcum <bill@lat.localnet> - 2011-06-27 01:55 -0400
    Re: Re (2): Can awk use `grep`? Geoff Clare <geoff@clare.See-My-Signature.invalid> - 2011-06-27 12:51 +0100
      Re: Re (2): Can awk use `grep`? gazelle@shell.xmission.com (Kenny McCormack) - 2011-06-27 12:18 +0000
        Re: Re (2): Can awk use `grep`? Geoff Clare <geoff@clare.See-My-Signature.invalid> - 2011-06-28 13:30 +0100
    Re (3): Can awk use `grep`? no.top.post@gmail.com - 2011-06-28 03:24 +0000
  Re: Re (2): Can awk use `grep`? Loki Harfagr <l0k1@thedarkdesign.free.fr.INVALID> - 2011-06-27 07:18 +0000
    Re: Re (2): Can awk use `grep`? Janis Papanagnou <janis_papanagnou@hotmail.com> - 2011-06-27 22:02 +0200
    Re (3): Can awk use `grep`? no.top.post@gmail.com - 2011-07-05 17:34 +0000

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