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insert text and add blank line

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# 1  
Old 08-15-2007
Bug insert text and add blank line
I need your help,

I want to add a text every 2nd line and also a blank line after 3 line
(In the output 2nd line is "changetype: modify" and every 4th line is blank line)

Input file format
dn: abc
orclsourceobjectdn: abcd
dn: bcd
orclsourceobjectdn: bcda
dn: cba
orclsourceobjectdn: cbaa


Output format has to be

dn: abc
changetype: modify
orclsourceobjectdn: abcd

dn: bcd
changetype: modify
orclsourceobjectdn: bcda

dn: cba
changetype: modify
orclsourceobjectdn: cbaa



Thanks in advance
# 2  
Old 08-15-2007
nawk -f athindi.awk myFile

athindi.awk:
Code:
!FNR%2 { print "changetype: modify"}
1
!FNR%2 { print ""}

# 3  
Old 08-15-2007
It's not the fastest script in the world, but it works for this situation. Save as insert.ksh.

Code:
#!/bin/ksh

    while read LINE
    do
        if [ $(expr "$LINE" : "dn:") -ne 0 ]
        then
            LINE="$LINE\nchangetype: modify"

        elif [ $(expr "$LINE" : "orclsourceobjectdn:") -ne 0 ]
        then
            LINE="$LINE\n"
        fi
        echo "$LINE"
    done

# ksh insert.ksh < file
dn: abc
changetype: modify
orclsourceobjectdn: abcd

dn: bcd
changetype: modify
orclsourceobjectdn: bcda

dn: cba
changetype: modify
orclsourceobjectdn: cbaa



#
# 4  
Old 08-16-2007
Code:
awk '{ if ( match($0, "^orcl") ) { printf "%s\n%s\n\n", "changetype: modify", $0 } else { print } }' filename

# 5  
Old 08-16-2007
try this one
hi, pls try this one as below:


Code:
cat file | awk '{ 
if (NR%2==1) 
{ 
print 
print "change" 
} 
else 
{ 
printf("%s\n",$0)
print "" } }'

# 6  
Old 08-16-2007
summer_cherry

this is UUOC

you can give the filename to the awk directly

no need to pipe the output of cat to awk
# 7  
Old 08-16-2007
Quote:
Originally Posted by summer_cherry
hi, pls try this one as below:


Code:
cat file | awk '{ 
if (NR%2==1) 
{ 
print 
print "change" 
} 
else 
{ 
printf("%s\n",$0)
print "" } }'

summer_cherry,
way too verbose for my taste..... Smilie
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