Help in understanding awk expression Post: 302601560

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Need help on understanding the Shell and AWK scripts

Hello Friends, I am new to the scripting & have to analyze bunch of regular production scripts. It has .ksh which calls on the .awk script having many functions I need to understand and debug the scripts ASAP Can anybody please let me know as how can I debug, I want to see the flow of code...

2. Shell Programming and Scripting

Understanding Awk and Cat

Hi Guys, I was recently come across some code to hopefully learn a little bit about putting Shell commands into PHP application to run on a Linux server. However, I don't understand the command AT ALL... and was wondering if anyone can interpret it: cat userIDs.dat | awk '{s=s+1; if...

3. UNIX for Dummies Questions & Answers

Awk inside Awk expression

Hi, It can be used awk inside other Awk?. I need to get another text processing while other text process. Thank you.

4. UNIX for Dummies Questions & Answers

understanding part of an awk script

Hi I have an awk script running in ksh in which a section of code is picking out the datetime as follows: dia=`echo $starttime | nawk '{ printf "%02d\n", substr($1,9,2)}'` mes=`echo $starttime | nawk '{ printf "%02d\n", substr($1,6,2)}'` ano=`echo $starttime | nawk '{ printf "%02d\n",...

5. UNIX for Advanced & Expert Users

understanding awk in this script

i am analyzing a query written by another developer ,need to understand part of script am looking at a code ..and it converts comma files to pipe delimited and also takes away quotes from any columns, source field format: 2510,"Debbie",NewYork changes to target: 2510|Debbie|NewYork ...

6. UNIX for Dummies Questions & Answers

Understanding / Modifying AWK command

Hey all, So I have an AWK command here awk '{if(FNR==NR) {arr++;next} if($0 in arr) { arr--; if (arr == 0) delete arr;next}{print $0 >"list2output.csv"}} END {for(i in arr){print i >"list1output.csv"}}' list1 list2 (refer to image for a more readable format) This code was submitted...

7. Shell Programming and Scripting

Help in Understanding awk if ( F ) syntax -

Hi Experts, I was looking at the below link, for finding words next to it, And unable to understand this syntax: Can any one please explain , what is meaning of this code: if ( F ) s = s ? s OFS $i : $i from:...

8. UNIX for Dummies Questions & Answers

Understanding awk

I found this on an awk site and would like to know what it does: /CARS/{x="";next} {if(x)print x;x=$0} END{if(x)print x}' Does it mean if it finds the word cars it skips that line and then prints the next one?

9. Shell Programming and Scripting

awk : Need Help in Understanding a command

Hello I am working on a Change request and Stuck at a point. The below awk command is used in the function. float_test ( ) { echo | awk 'END { exit ( !( '"$1"')); }' } I understand that awk 'END' is used to add one line at the end and exit is used to end the script with an error...

10. Shell Programming and Scripting

Understanding awk 'expansion'

Heyas Recently i wanted to help someone with an awk script, but the end-script didnt work as expected. He wanted, if HOME was empty, to get the HOME of the current USER from /etc/passwd. At first i tried hardcoded with root: awk -F: '/^root/ {print $6}' /etc/passwd As that worked, i've...

LEARN ABOUT CENTOS

igawk

IGAWK(1)							 Utility Commands							  IGAWK(1)

NAME

       igawk - gawk with include files

SYNOPSIS

       igawk [ all gawk options ] -f program-file [ -- ] file ...
       igawk [ all gawk options ] [ -- ] program-text file ...

DESCRIPTION

       Igawk is a simple shell script that adds the ability to have ``include files'' to gawk(1).

       AWK programs for igawk are the same as for gawk, except that, in addition, you may have lines like

	      @include getopt.awk

       in your program to include the file getopt.awk from either the current directory or one of the other directories in the search path.

OPTIONS

       See gawk(1) for a full description of the AWK language and the options that gawk supports.

EXAMPLES

       cat << EOF > test.awk
       @include getopt.awk

       BEGIN {
	    while (getopt(ARGC, ARGV, "am:q") != -1)
		 ...
       }
       EOF

       igawk -f test.awk

SEE ALSO

       gawk(1)

       Effective AWK Programming, Edition 1.0, published by the Free Software Foundation, 1995.

AUTHOR

       Arnold Robbins (arnold@skeeve.com).

Free Software Foundation					    Nov 3 1999								  IGAWK(1)

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Need help on understanding the Shell and AWK scripts

Discussion started by: amberj123

2. Shell Programming and Scripting

Understanding Awk and Cat

Discussion started by: jordRiot

3. UNIX for Dummies Questions & Answers

Awk inside Awk expression

Discussion started by: pepeli30

4. UNIX for Dummies Questions & Answers

understanding part of an awk script

Discussion started by: shajju