Shell Programming and Scripting

Could you interpret the following sed and awk command for me?

command:
cat tempfile2 |sed "s/\(BUILD-3-.*-[0-9]\.[0-9]-\)\([0-9].*\.[0-9].*\.[0-9].*\)/\2/" | awk '{printf "%-8.8s %-23.23s %-30.30s %-50.50s\n", $1,$2,$3,substr($0,index($0,$4))}' > outfile2 2>/dev/null

input:data in tempfile2
BUILD-3-CbsOrderDTVInterfaceV2-1.0-2.0.7 DCR-14447 vk0957-?Vikas?Kaward validate?BTN?field?as?alphnumeric?instead?of?numeric.

output:
2.0.7 DCR-14447 vk0957-?Vikas?Kaward validate?BTN?field?as?alphnumeric?instead?of?numer

It's transforming the input file into the output file. Specifically, the sed command is stripping everything from "BUILD-3" until some version number, keeping only that version number. The awk command is formatting the resulting space-delimited fields into strings of a maximum length (of 8, 23, 30, and 50 characters). So you see the last field is truncated and instead of displaying "...?numeric." it displays "...?numer".

Thank you for the valuable input.

But while I give the following input,

BUILD-3-ECDBCrisDataLoaderV8-1.14-8.14.2 DCR-14461 mpdwfxt?-?Jayashree Remove?Pef?Changes

It gives the following output which is not as per the above format? can you tell me why?

BUILD-3- DCR-14461 mpdwfxt?-?Jayashree Remove?Pef?Changes

I think the problem is that the sed command is inside double-quotes. This means the shell is interpreting \. and so sed sees a period, which means "match any character", as opposed to \. which means "match a period". So the expression matches everything it can, including DCR-14461 in the second column. Simply replace the double-quotes (") with single-quotes (').

But sir!!!!!!

Still i get the same error.

output:

cat tempfile2 |sed 's/\(BUILD-3-.*-[0-9]\.[0-9]-\)\([0-9].*\.[0-9].*\.[0-9].*\)/\2/' | awk '{printf "%-8.8s %-23.23s %-30.30s %-50.50s\n", $1,$2,$3,substr($0,index($0,$4))}' > outfile2 2>/dev/null

mbsyst01:vj8436$cat outfile2
BUILD-3- DCR-14461 mpdwfxt?-?Jayashree Remove?Pef?Changes
BUILD-3- DCR-14463 sc4294 Change?the?getSBTCComponents?file?to?include?the?l
BUILD-3- DCR-14476 mpdwfxt?-?Jayashree Undoing?perf?changes

That's odd. Okay, replace all instances of

Code:

.*

with

Code:

[^ ]*