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problem developing for or while loops with the cut command

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Top Forums Shell Programming and Scripting problem developing for or while loops with the cut command
# 8  
Old 11-12-2008
Almost there
OK. So here is what I have. It almost looks good, but can't figure out why it is giving me the output it is providing.

Code:
exec < workunits-status.txt
while read line; do
    awk '{ if ($1 < 10) print substr($0,12), "       ", substr($0,14,35), "
   ", substr($0,36);
          else if (($1 > 9) && ($1 < 100)) print substr($0,11,12), "      ", sub
str($0,14,35), "        ", substr($0,36);
          else if (($1 > 99) && ($1 < 1000)) print substr($0,10,12), "     ", su
bstr($0,14,35), "        ", substr($0,36);
          else print substr($0,9,12), "    ", substr($0,14,35), "        ", subs
tr($0,36);
         }' workunits-status.txt > workunits.txt
done

What it is not doing is giving me the spaces as specified in the print command and it is throwing out duplicate information on the same line. See example below.

Code:
WorkUnit:    Process-Name:        WF-Status:
4 pftestAssert02b       3         pftestAssert02b       3          3
14 pftestCus        pftestCustom01b       3          3
28 pftestAss        pftestAssert02b       3          3
38 pftestCus        pftestCustom01b       3          3
50 pftestAss        pftestAssert02b       3          3
60 pftestCus        pftestCustom01b       3          3
72 pftestMer        pftestMerc01          3          3

Please help. This has been day 2 and a trying experience. I have learned a lot from it already. Your help would be greatly appreciated.
# 9  
Old 11-12-2008
Quote:
Originally Posted by synergy_texas
Here is the expected output:

Code:
WorkUnits:             Process-Name:              Status:
4                      pftestAssert02b            3
14                     pftestCustom01b            3
28                     pftestAssert02b            3
38                     pftestCustom01b            3
107                    pftestAssert02b            3
117                    pftestCustom01b            3
129                    pftestAssert02b            3
139                    pftestCustom01b            3
1043                   VMOHMQTASK                 3
1044                   VMOHMQTASK                 3
1045                   VMOHMQTASK                 3
1073                   email_test                 3

...
Code:
awk 'BEGIN{printf "%-22s %-26s %s\n","WorkUnits:","Process-Name:","Status:"}{printf "%-22s %-26s %s\n",$1,$2,3}' file

# 10  
Old 11-13-2008
Hello guys!
I learned a lot from this thread, most of all that exec not always did what I was used to. Actually I've used that method in cmd (<file to set stdin for consecutive commands) and it is always good to see parallels.

Anyway, after Danmeros solution I just had to figure out a way to do it in more familiar grounds, awk and sed not being part of it and how OP started out with a while loop. I fiddled with different loops and smaller programs like tr, cut, column, etc and even thought about printf. But Danmero showed the way.

I wanted to do it in "pure" shell and given that printf usually is a built in, it should be faster that calling an external program... I guess it's a question of nanoseconds! Smilie


Quote:
(echo WorkUnits: Process-Name: Status:;cat src)|while read x y z;do printf "%-22s %-26s %s\n" $x $y $z;done
Well, for what it's worth, it's yet another way to do it. printf was the key.

/Lakris

PS And I hope it's not a totally worthless use use of cat...
# 11  
Old 11-13-2008
Quote:
Originally Posted by Lakris
..
I wanted to do it in "pure" shell and given that printf usually is a built in, it should be faster that calling an external program...
...
PS And I hope it's not a totally worthless use use of cat...
cat is external program and is useless Smilie
Code:
printf "%-22s %-26s %s\n" WorkUnits: Process-Name: Status:
while read x y z;do printf "%-22s %-26s %s\n" $x $y $z;done < file

# 12  
Old 11-13-2008
Hehe, right, I did EXACTLY that, hence my statement about external programs, but before I posted it I decided to try another one without TWO printf statements... I guess the cat bit the hand...

Yet another way!

Smilie

/Lakris
# 13  
Old 11-13-2008
I agree with Lakris, I have learned a lot from this post. It amazes me how you guys come up with 1 liners that sometimes take me up to 15 lines. You guys are awesome. I appreciate your help. I have already turned one of my coworkers on to this forum. You guys have been a great help and I will continue to research and use this forum for future issues. Hopefully, I will get better at scripting. Smilie
# 14  
Old 11-13-2008
Been there, done that, and lo and behold;
I went to The UNIX and Linux Forums - the Top UNIX & Linux Q&A on the Web

Now I learn a lot from the questions, and other peoples answers, giving me new views on problems that I didn't know I could face but sure as rain will (and has) hit me one day. It is a continuous learning experience.

Good luck

/Lakris
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