Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: awk problem
Special Forums UNIX Desktop Questions & Answers awk problem Post 302533912 by neutronscott on Saturday 25th of June 2011 01:32:54 PM
Old 06-25-2011
I was showing you that you don't need a loop with redirection, because you only need to run awk once to get the first line.

[ -n "$var" ]

the "[" is a built-in for "test". try "help test" in your shell. this runs the loop once, because it just tests if var doesn't exist.

I think the easiest way though, if you want to print the first line in a file is

Code:
head -1 file

 

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

AWK Problem

Hi, I posted something here about this yesterday but I can't seem to find it. I needed help writting a script which would append a file with new lines after every so many charachters. Example: (my original flat file) L60 LETTER OF CREDIT 60 DAYS W00 ON RECEIPT WIRE TRANSFER W30 NET... (12 Replies)
Discussion started by: gseyforth
12 Replies

2. Shell Programming and Scripting

Problem with AWK

Hi All, How can i store a value of the unix command executed in AWK with system command. devise=`cut -c1-3 dvgp.txt` I wrote this command in awk as awk'{ code= sprintf("devise=`cut -c1-3 dvgp.txt`"); system(code); }' Is this correct. can you please suggest me how the code can be... (1 Reply)
Discussion started by: krishna_gnv
1 Replies

3. Shell Programming and Scripting

problem using awk

Hi there every body I'm new to shell scripting and there is a problem facing me,, please look at the following piece of code: awk ' BEGIN{ FS="<assertion id=\1"; RS="<assertion id=\"2"}/<assertion id=\"1/{print FS$2 > "/home/ds2/test/output.txt"} ' filename all I wanna do is to... (6 Replies)
Discussion started by: senior_ahmed
6 Replies

4. Shell Programming and Scripting

Awk problem: How to express the single quote(') by using awk print function

Actually I got a list of file end with *.txt I want to use the same command apply to all the *.txt Thus I try to find out the fastest way to write those same command in a script and then want to let them run automatics. For example: I got the file below: file1.txt file2.txt file3.txt... (4 Replies)
Discussion started by: patrick87
4 Replies

5. Shell Programming and Scripting

Problem with awk awk: program limit exceeded: sprintf buffer size=1020

Hi I have many problems with a script. I have a script that formats a text file but always prints the same error when i try to execute it The code is that: { if (NF==17){ print $0 }else{ fields=NF; all=$0; while... (2 Replies)
Discussion started by: fate
2 Replies

6. Shell Programming and Scripting

awk problem

Find the number of files with sizes > 100KB in /, /bin, /usr, /usr/bin and /usr/sbin directories and output them in a two column format with the name of the directory and the number of files. i tried with awk $>ls -lh | awk '/^-/ && $5 >= 100k {print $8 $5}' but it is not working pls tell... (3 Replies)
Discussion started by: abhikamune
3 Replies

7. UNIX for Dummies Questions & Answers

Little problem with AWK

I thought I had solved this problem but after testing the script I came to realize that it is not doing what I need. So, here it goes again. This is the code: awk '/\>/{F=$2; N=$3; split(FILENAME, A, "."); getline; x = ">"}{print ">" A"-" x++" "F" " N"\n" $0}' This is the input file: ... (5 Replies)
Discussion started by: Xterra
5 Replies

8. Shell Programming and Scripting

awk problem - combining awk statements

i have a datafile that has several lines that look like this: 2,dataflow,Sun Mar 17 16:50:01 2013,1363539001,2990,excelsheet,660,mortar,660,4 using the following command: awk -F, '{$3=strftime("%a %b %d %T %Y,%s",$3)}1' OFS=, $DATAFILE | egrep -v "\-OLDISSUES," | ${AWK} "/${MONTH} ${DAY}... (7 Replies)
Discussion started by: SkySmart
7 Replies

9. Shell Programming and Scripting

awk problem

i have an email list in file.txt with comma separated line1 - FIELD1,pippo@gmail.com,darth@gmail.com line2 - FIELD2,pippo@gmail.com,darth@gmail.com,sampei@gmail.com output=(awk -F ',' -v var="$awkvar" '$1==var {print $2,$3,$4}' spreadsheet.txt)but awk delete some letters at the... (8 Replies)
Discussion started by: pasaico
8 Replies

10. Shell Programming and Scripting

awk problem

Hi I have two columns and I would like to create a third column based on how many lines away from a value of 1 in column 2, for example I have 1,0 2,0 3,0 4,0 5,0 6,1 7,0 8,0 9,0 10,0 11,1 And I want an output (6 Replies)
Discussion started by: garethsays
6 Replies

LEARN ABOUT OSX

cplustestrig

CPlusTestRig(1) 					    BSD General Commands Manual 					   CPlusTestRig(1)

NAME

     CPlusTestRig -- runs CPlusTest unit test bundles

SYNOPSIS

     CPlusTestRig [-test testname] testbundle

DESCRIPTION

     CPlusTestRig loads and runs the bundle testbundle containing unit tests built with the CPlusTest framework (/System/Library/Frameworks/CPlus-
     Test.framework).  If one or more [-test testname] pairs is specified only those tests (TestCase and TestSuite instances) in testbundle are
     run.  If no such pairs are specified, all TestCase and TestSuite instances are run as part of the default "All" test suite.

     CPlusTestRig is intended for testing frameworks and libraries.  That is, it must be possible for CPlusTestRig to load testbundle into its own
     address space.  To test applications, use RunUnitTests(1) instead.

     To test a framework or library in a location other than the one recorded in testbundle at link time, use dyld(1) environment variables such
     as DYLD_FRAMEWORK_PATH and DYLD_LIBRARY_PATH to ensure that the nonstandard location is searched.

ENVIRONMENT

     CPlusTestDelayExit  If this environment variable is present, CPlusTestRig will print its process ID to standard output and delay exit indefi-
			 nitely upon completion.  This is useful for running leaks(1) or other debugging tools.

FILES

     /Developer/Tools/CPlusTestRig
     /System/Library/Frameworks/CPlusTest.framework

SEE ALSO

     dyld(1), leaks(1), RunUnitTests(1)

Mac OS X							   June 2, 2019 							  Mac OS X
All times are GMT -4. The time now is 08:23 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy