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Shell Script on for do


 
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# 1  
Shell Script on for do

Hi all,
I have a list of servers in a file test
I have used awk to print the particular column.I need to configure 100 servers but the description has a space between .Hence the configuration file is not created properly
Code:
#cat test
host1,10.0.0.1,AD server
host2,10.0.0.2,File server
host3,10.0.0.3,Print Server

The script is
Code:
# vim test.sh
for i in $(cat test);do
     h=$(grep $i test |  awk -F "," '{print $1}')
     P=$(grep $i test |  awk -F "," '{print $2}')
     S=$(grep $i test |  awk -F "," '{print $3}')
     echo $S,$P,$H >> ip
     #echo define host{ >> hosts.cfg
     #       echo -e ' \t ' "use"  ' \t '   ' \t '            hoststatus >> hosts.cfg
     #        echo -e ' \t ' "host_name"  ' \t '       $h >> hosts.cfg
     #        echo -e ' \t ' "alias"    ' \t '         $S >> hosts.cfg
     #        echo -e ' \t ' "address"   ' \t '       $P >> hosts.cfg
     #        echo -e ' \t ' "hostgroups" ' \t '    monitor  >> hosts.cfg
     #echo } >> hosts.cfg
done

the output is
Code:
#cat test
AD server
File server
Print Server,10.0.0.1
10.0.0.2
10.0.0.3,host1
host2
host3
Print Server,10.0.0.3,host3

Hence I used sed to replace the space which some character
Code:
# cat test
host1,10.0.0.1,AD;server
host2,10.0.0.2,File;server
host3,10.0.0.3,Print;Server
#sh test.sh

the output is fine .Why is the space between the two words not printed properly irrespective of me specifing the delimiter Smilie.Should I use LFS="/n" or some parameter to fix this issue

Need your expertise for the same Smilie

Moderator's Comments:
Mod Comment Please use code tags, thanks.

Last edited by zaxxon; 08-23-2011 at 05:16 AM.. Reason: code tags
# 2  
You definitely shouldn't use neither LFS nor "/n". Smilie
But you can use IFS=$'\n' or better while loop instead of for:
Code:
while read i; do
  ...
done <test

You can easy to see what happens with:
Code:
for i in $(cat test); do
  echo $i
done

# 3  
when I use IFS=$'\n'
Code:
AD server,10.0.0.1,host1
AD server File server,10.0.0.1 10.0.0.2,host1 host2
File server,10.0.0.2,host2
AD server File server,10.0.0.1 10.0.0.2,host1 host2
Print Server,10.0.0.3,host3
Print Server,10.0.0.3,host3

instead of this output
Code:
AD server,10.0.0.1,host1
File server,10.0.0.2,host2
Print Server,10.0.0.3,host3

Why is the space creating this issue

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