Login or Register to Ask a Question and Join Our Community


Shell Programming and Scripting

awk - writing matching pattern to a new file and deleting it from the current file

Login to Discuss or Reply to this Discussion in Our Community

 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting awk - writing matching pattern to a new file and deleting it from the current file
# 1  
Old 12-01-2012
awk - writing matching pattern to a new file and deleting it from the current file
Hello ,

I have comma delimited file with over 20 fileds that i need to do some validations on. I have to check if certain fields are null and then write the line containing the null field into a new file and then delete the line from the current file.

Can someone tell me how i could go about doing this?

The master file is file.out and the file that i am trying to write the lines with null records is called test_exc


I am trying the below code without joy

Code:
function SX_file_exc {
        nawk -F, '{
                if( $1 == "" )
                {
                        {next}{print}
                }
                if( $8 == "" )
                {
                        {next}{print}
                }
                if( $13 == "" )
                {
                        {next}{print}
                }
        }' OFS=, file.out >> test_exc
        return
}

# 2  
Old 12-01-2012
Hi, try:
Code:
awk -F, '$1=="" || $3=="" || $8=="" {print>f; next}1' f=test_exc file.out > filenew.out

This User Gave Thanks to Scrutinizer For This Post:
goddevil
# 3  
Old 12-01-2012
Quote:
Originally Posted by Scrutinizer
Hi, try:
Code:
awk -F, '$1=="" || $3=="" || $8=="" {print>f; next}1' f=test_exc file.out > filenew.out

Cheers.. It worked a charm
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Big pattern file matching within another pattern file in awk or shell

Hi I need to do a patten match between files . I am new to shell scripting and have come up with this so far. It take 50 seconds to process files of 2mb size . I need to tune this code as file size will be around 50mb and need to save time. Main issue is that I need to search the pattern from... (2 Replies)
Discussion started by: nitin_daharwal
2 Replies

2. Shell Programming and Scripting

Deleting lines on matching certain pattern

hi I have a large xml file from which i have taken few lines . In this file I have to find for the string </invoices> and check if the 3 rd line after this string does not begin with <portCode> ,then i have to delete the string </invoices> and the next line having the string </shippingBill>... (13 Replies)
Discussion started by: sunnyboy
13 Replies

3. Shell Programming and Scripting

Awk: Matching Pattern From other file with length

Hi, I have input file whose first column needs(match.txt) to be matched with the first column of the input file with min & max length as defined in match.txt. But conditions are not matching. Please help on the changes in the code below as for multiple enteries in match.txt complete match.txt will... (3 Replies)
Discussion started by: siramitsharma
3 Replies

4. UNIX for Dummies Questions & Answers

How to append portion of a file content to another file when a certain pattern is matching?

Hi ladies and gentleman.. I have two text file with me. I need to replace one of the file content to another file if one both files have a matching pattern. Example: text1.txt: ABCD 1234567,HELLO_WORLDA,HELLO_WORLDB DCBA 3456789,HELLO_WORLDE,HELLO_WORLDF text2.txt: XXXX,ABCD... (25 Replies)
Discussion started by: bananamen
25 Replies

5. Shell Programming and Scripting

Read from one file-Replace a pattern in another with the current one

Hi Friends, I have a text file like this cat main.txt I like this website cat website > new_website grep website > hello_website cat replace.txt hello unix apple Now, for each line read in 2.txt, I want the pattern "website" in 1.txt to be replaced with it. Basically, I... (9 Replies)
Discussion started by: jacobs.smith
9 Replies

6. Shell Programming and Scripting

Deleting lines from a stream after matching a pattern

Hi, I have a requirement to to an ldapsearch and remove the shadow attributes in the output file. What I do is ldapsearch() | operation to remove shadow > FILE The ldapsearch gives output like this(with same line formation): objectClass: FSConfig objectClass: extensibleObject fsCAIP:... (10 Replies)
Discussion started by: lorzinian
10 Replies

7. Shell Programming and Scripting

pattern matching over multiple lines and deleting the first

I've got a longish log file with content such as Uplink traffic: Downlink traffic: I want to parse the log file and remove any line that contains the string "Uplink traffic:" at the beginning of the line, but only if the line following it beginnings with the string "Downlink traffic:" (in... (7 Replies)
Discussion started by: Yorkie99
7 Replies

8. Shell Programming and Scripting

Searching a pattern in file and deleting th ewhole line containing the pattern

Hi All, Please can someone assist in the script I have made that searches a pattern in a file and delete the whole line containing the pattern. #!bin/sh # The pattern that user want to add to the files echo "Enter the pattern of the redirect" read value # check if the user has... (1 Reply)
Discussion started by: Shazin
1 Replies

9. Shell Programming and Scripting

deleting a pattern from a file

say i have a file with the following contents 0x20 0x20 0xc23886 > 0xc12354 > 0xc567555555 i want to delete "> " pattern and keep the rest of the file (6 Replies)
Discussion started by: lassimanji
6 Replies

10. UNIX for Dummies Questions & Answers

Checking for a file in file pattern before deleting it

Hi, I need a script where I have delete all the files of type abc*.* from the directory /lmn/opq (passed as parameter to script) But I need to check if there is file of type abc*.* existing in the directory or not before I use the rm abc*.* command. Thanks (1 Reply)
Discussion started by: dsrookie
1 Replies
Login or Register to Ask a Question