End of file in AWK

Thread Tools Search this Thread
Top Forums Shell Programming and Scripting End of file in AWK
# 1  
Old 11-11-2009
End of file in AWK


I need to control when i arrive to the end of my file, any built-in? or another way to do?

# 2  
Old 11-11-2009
No built-in for EOF in awk, you can do something like this:

awk -v eof=$(wc -l < file) '
NR==eof{print "Last line: " $0}
' file

# 3  
Old 11-11-2009
the so called "EOF" in awk is the END{} block or when getline returns 0. what do you want to "control" ?
# more file
$ awk 'BEGIN{ while(1) { if ( (getline line < "file") == 0 ) {print "eof: "line;break} } }'
eof: 3

Last edited by ghostdog74; 11-11-2009 at 09:28 AM..
# 4  
Old 11-11-2009
Originally Posted by claw82

I need to control when i arrive to the end of my file, any built-in? or another way to do?
You have the END special pattern. If more than one input file is processed you can either use the new experimental ENDFILE pattern (available with a separate patch for Gnu AWK) or write it yourself using the FILENAME built-in variable.

This link is also relevant.
# 5  
Old 11-16-2009
The solution proposed for Franklin is good for me, because i can't use the END instruction, i need to know the end of file in the body of my awk.

Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Printing string from last field of the nth line of file to start (or end) of each line (awk I think)

My file (the output of an experiment) starts off looking like this, _____________________________________________________________ Subjects incorporated to date: 001 Data file started on machine PKSHS260-05CP ********************************************************************** Subject 1,... (9 Replies)
Discussion started by: samonl
9 Replies

2. UNIX for Dummies Questions & Answers

awk until the end of file

Hi, I tried to use a code to awk until the end of file. I not sure what is the syntax so my last paragraph is \n `var=$(awk '/\n/ {P=0} /Policy Change/ {P=1} P' (2 Replies)
Discussion started by: alvinoo
2 Replies

3. Shell Programming and Scripting

Add 8 columns at the end of .csv file using awk

Hello all, I have a .csv file of 16 columns consists of bunch of numbers. 6.45E+01 1.17E+01 8.10E+04 8.21E+01 8.50E+00 1.20E+01 1.02E+01 1.88E+01 1.86E+04 3.53E+03 1.09E+07 3.82E+04 2.09E+03 3.57E+03 2.98E+03 3.93E+03 6.34E+01 3.23E+01 9.24E+04 ... (5 Replies)
Discussion started by: Zam_1234
5 Replies

4. Shell Programming and Scripting

Using awk to append incremental numbers to the end of duplicate file names.

I'm currently working on a script that extracts files from a .zip, runs an sha1sum against them and then uses awk to pre-format them into zomething more readable thusly: Z 69 89e013b0d8aa2f9a79fcec4f2d71c6a469222c07 File1 Z 69 6c3aea28ce22b495e68e022a1578204a9de908ed File2 Z 69... (5 Replies)
Discussion started by: Ethereal
5 Replies

5. Shell Programming and Scripting

AWK-grep from line number to the end of file

Does anyone know how to use awk to act like grep from a particular line number to the end of file? I am using Solaris 10 and I don't have any GNU products installed. Say I want to print all occurrences of red starting at line 3 to the end of file. EXAMPLE FILE: red green red red... (1 Reply)
Discussion started by: thibodc
1 Replies

6. Shell Programming and Scripting

Print required values at end of the file by using AWK

I am looking help in awk, quick overview. we will get feed from external system . The input file looks like below. Detail Id Info Id Order Id STATUS Status Date FileDetail 99127942 819718 CMOG223481502 PR 04-17-2011 06:01:34PM... (7 Replies)
Discussion started by: dvrbabu
7 Replies

7. Shell Programming and Scripting

AWK : Add columns in the end of csv file

Hi everybody, I need some help please I have a csv file named masterFile1.csv header1,header2,header3 value1,value2,value3 value4,value5,value6 I am trying to add new columns in the end of the csv to have a new csv file named masterFile2.csv like this :... (3 Replies)
Discussion started by: villebonnais
3 Replies

8. Shell Programming and Scripting

Using SED/AWK to extract xml at end of file

Hello everyone, Firstly i do not require alot of help.. i am right at the end of finishing my scipt but cannot find a solution to the last part. What i need to do is, prompt the user for a file to work with, which i have done. promt the user for an output file - which is done. #!/bin/bash... (14 Replies)
Discussion started by: hugh86
14 Replies

9. Shell Programming and Scripting

using awk to comment out lines to the end of file

Hello, I have a file as follow a b c c d d e I would like to write a awk command to insert # from the first occurence of "c" to the end of the files. OUTPUT should be like this a b #c (5 Replies)
Discussion started by: phamp008
5 Replies

10. Shell Programming and Scripting

Add end of char \n on end of file

Hi, I want to add \n as a EOF at the end of file if it does't exist in a single command. How to do this? when I use command echo "1\n" > a.txt and od -c a.txt 0000000 1 \n \n 0000003 How does it differentiate \n and eof in this case? Regards, Venkat (1 Reply)
Discussion started by: svenkatareddy
1 Replies
Login or Register to Ask a Question