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Top Forums Shell Programming and Scripting Comma delimited row into multiple rows, repeat first value Post 302560017 by newreverie on Wednesday 28th of September 2011 04:20:59 PM
Old 09-28-2011
Comma delimited row into multiple rows, repeat first value

i am building a database to keep track of unix groups.

Using the command "ypcat group"

I get an output similar to the following

Code:
group1:GROUP:9999:user1,user2,user3
groupA:GROUP:1111:usera,userb,userc

I want to convert this output so it looks like this
Code:
group1:user1
group1:user2
group1:user3
groupA:usera
groupA:userb
groupA:userc

using two sed commands i've gotten to this point

Code:
ypcat group | sed 's#:.*:.*:#:\n#g' | sed 's#,#\n#g'
This gets me to here:
group1:
user1
user2
user3
groupA:
usera
userb
userc

I know there is a way to preappend the group lines to the other lines with the hold function in sed but i can't seem to get it right. There is also probably an awk command to accomplish this.
The sed command should look similar to this but it has no affect:
Code:
sed '#:#{hd}G'

Moderator's Comments:
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Last edited by radoulov; 09-28-2011 at 05:30 PM..
 

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ypcat(1)							   User Commands							  ypcat(1)

NAME
ypcat - print values in a NIS database SYNOPSIS
ypcat [-kx] [-d ypdomain] mname DESCRIPTION
The ypcat command prints out values in the NIS name service map specified by mname, which may be either a map name or a map nickname. Since ypcat uses the NIS network services, no NIS server is specified. Refer to ypfiles(4) for an overview of the NIS name service. OPTIONS
-k Display the keys for those maps in which the values are null or the key is not part of the value. None of the maps derived from files that have an ASCII version in /etc fall into this class. -d ypdomain Specify a domain other than the default domain. -x Display map nicknames. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | |Availability |SUNWnisu | +-----------------------------+-----------------------------+ SEE ALSO
ypmatch(1), ypfiles(4), attributes(5) SunOS 5.10 23 Jan 1995 ypcat(1)
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