Shell Programming and Scripting

Hi All thanks for all your help.
In continuation to that i have one more problem
In the final out put file i have to insert a string (EG: FAILED)

i have tried all possible ways
1) (echo '0a'; echo 'FAILED '; echo '.'; echo 'wq') | ed -s /tmp/myfile
but it is not working when i am ruunning the script
a ? is coming.

i have tried other way also
2)sed 's/^.*$/FAILED;&/'

but it is showing command garbled

3) i have tried this also

sed '1i FAILED' /tmp/myfile

but it is also not working.

Can anyone help me out??


Thanks in advance

Code:

awk 'NR==FNR{a[$0];next}!($1 in a)END{print "FAILED"}' file2 file1

Regards

Thanks a lot..!!

Hi Franklin52,
Thanks for your ur update,but i guess this does not fill the requirement and hence i am getting it wrong.

The line ==>> nawk 'NR==FNR{a[$0];next}!($1 in a)' file2 file1

what this line will do it will each string on each line from file two and compare it with strings present in file1 and print all the string which are present in file1.
Now my requirement is that i have collected all the strings in some third file and if there are some strings in the third file then only i want to insert a string at the beginning of the file.Because later i would be testing whether any string got collected in the third file.


Eg:
nawk 'NR==FNR{a[$0];next}!($1 in a)' file2 file1 >> /tmp/file3

if [ -s /tmp/file3 ] ; then
==== here it is checking whether there is any content in file3 and if this condition is true then i want to insert a string (EG:FAILED) at the beginning of the file /tmp/file3

How can i do it.

Because as franklin said if i am doing
awk 'NR==FNR{a[$0];next}!($1 in a)END{print "FAILED"}' file2 file1 >> /tmp/file3

and if file1 and file2 contents are same then /tmp/file3 file will be empty and there i dont need to insert any string but with this line :
awk 'NR==FNR{a[$0];next}!($1 in a)END{print "FAILED"}' file2 file1 >> /tmp/file3

it is inserting that string event to the empty file.


i hope i have made my piont clear,if not please let me know. Please help..!!

Thanks

Something like this?

Code:

nawk 'NR==FNR{a[$0];next}!($1 in a{print;c++})END{if(c){print "FAILED"}}' file2 file1 >> /tmp/file3

Regards

Hi Franklin
Thanks for the reply but when i am executing that line:

nawk 'NR==FNR{a[$0];next}!($1 in a{print;c++})END{if(c){print "FAILED"}}' file2 file1 >> /tmp/file3


i am getting this:
nawk: syntax error at source line 1
context is
NR==FNR{a[$0];next}!($1 in >>> a{ <<<
nawk: bailing out at source line 1

Cau you help??

Sorry, I made a typo:

Code:

nawk 'NR==FNR{a[$0];next}!($1 in a){print;c++}END{if(c){print "FAILED"}}' file2 file1 >> /tmp/file3

Regards