Login or Register to Ask a Question and Join Our Community


Shell Programming and Scripting

Awk command without input file

Login to Discuss or Reply to this Discussion in Our Community

 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting Awk command without input file
# 1  
Old 01-11-2011
Awk command without input file
i have a requirement to compare two time stamps in IF condition and return true whenever the second timestamp is greater than first, i will also be checking, if the timestamp in HHMMSS format( 6 digit time stamp ).Im able to achieve it using awk, however i dont want to give any input file to awk and i will not be able to give input from command line as im running this in a script.

starttime = HHMMSS
endtime = HHMMSS

awk -v val1=$starttime -v val2=$endtime '{ if ( length(val1)==6 && length(val2)==6 && val2 > val1 ) print }' filename


in the above syntax i want to eliminate the file as im not doing any thing against the file and also if awk logic is sucessful my script should continue else it should exit the script.

Can we achieve all this in a single command without using awk command.
# 2  
Old 01-11-2011
did you try by assigning to a variable?
# 3  
Old 01-11-2011
You can do that in the begin segment
Code:
awk -v val1=$starttime -v val2=$endtime 'BEGIN{ if ( length(val1)==6 && length(val2)==6 && val2 > val1 ) print "yes"}'

Careful with timestamps around midnight..
# 4  
Old 01-11-2011
Thanks Scrutinizer. it worked

im using this command in windows batch script. Can i assign the output of this command to windows varaible.i tried in unix format using grave accent (`) but it is not working. i want to assign this to a varaible in windows like

set check=`awk -v val1=$starttime -v val2=$endtime 'BEGIN{ if ( length(val1)==6 && length(val2)==6 && val2 > val1 ) print "yes"}'`
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. UNIX for Beginners Questions & Answers

awk command input string too long, limit

cat filename| awk '{ $1=""; print $0}' in my file there are few lines that has more than 3000 characters per line and as soon as I run the above command it cores, strings core reveals that the awk is failing because input string too long, limit. can i get some help from the experts to find... (8 Replies)
Discussion started by: knijjar
8 Replies

2. Shell Programming and Scripting

awk command to search based on 5 user input fields

Field1=”” Field2=”” Field3=”” Field4=”” Field5=”” USER INPUT UP TO 5 FIELDS awk -F , '{ if ( $3 == Field1 && $6 == Field2 && $8 == Field3 && $9 == Field4 && $10 == Field5) print $0 }' /tmp/rodney.outD INPUT FILE (Rodney.outD): ... (3 Replies)
Discussion started by: rmerrird
3 Replies

3. Shell Programming and Scripting

Use while loop to read file and use ${file} for both filename input into awk and as string to print

I have files named with different prefixes. From each I want to extract the first line containing a specific string, and then print that line along with the prefix. I've tried to do this with a while loop, but instead of printing the prefix I print the first line of the file twice. Files:... (3 Replies)
Discussion started by: pathunkathunk
3 Replies

4. Shell Programming and Scripting

awk to reformat output if input file is empty, but not if file has data in it

The below awk improved bu @MadeInGermany, works great as long as the input file has data in it in the below format: input chrX 25031028 25031925 chrX:25031028-25031925 ARX 631 18 chrX 25031028 25031925 chrX:25031028-25031925 ARX 632 14... (3 Replies)
Discussion started by: cmccabe
3 Replies

5. UNIX for Dummies Questions & Answers

awk - Rename output file, after processing, same as input file

I have one input file ABC.txt and one output DEF.txt. After the ABC is processed and created output, I want to rename ABC.txt to ABC.orig and DEF to ABC.txt. Currently when I am doing this, it does not process the input file as it cannot read and write to the same file. How can I achieve this? ... (12 Replies)
Discussion started by: High-T
12 Replies

6. Shell Programming and Scripting

Read input file with in awk script not through command line

Hi All, Do we know how to read input file within awk script and send output toanother log file. All this needs to be in awk script, not in command line. I am running this awk through crontab. Cat my.awk #!/bin/awk -f function test(var){ some code} { } END { print"test code" } (5 Replies)
Discussion started by: random_thoughts
5 Replies

7. Shell Programming and Scripting

awk input large file

Hi...Does anyone know how to input huge file about 25 GB to awk if single file then this works awk '{print}' <hugefile suppose if have to use something like this awk FNR==NR{x=$0;next}{print $0,x}' hugefile1 hugefile2 then how to redirect ? and is there any provision to assign memory... (12 Replies)
Discussion started by: Akshay Hegde
12 Replies

8. Shell Programming and Scripting

Variable as input to awk command

Hi Gurus, I need a suggestion, please help. I have a input file as below : abc.txt : * xxxx: 00000 xxxxx: 00000 xxxx: RANDOM xxx: RANDOM **************************xxxxxxx*** * abc ****************************** abc: abc: ... (3 Replies)
Discussion started by: arunshankar.c
3 Replies

9. Shell Programming and Scripting

AWK Script to convert input file(s) to output file

Hi All, I am hoping someone can help me with some scripting I need to complete using AWK. I'm trying to process multiple fixed files to generate one concatenated fixed file in a standard format. The Input file is:- aaaa bbbbb ccccc 1 xxxx aaa bbb aaaa bbbbb ccccc 2 abcd aaa CCC... (9 Replies)
Discussion started by: jason_v_brown
9 Replies

10. UNIX for Dummies Questions & Answers

AWK command giving wrong input

Hi all, I have a problem with qwk command. i have to check process status and for that i am using command prstat -mvL 1 1 and it gives me the entire output but when i use this command with awk like this: prstat -mvL 1 1 | awk -F" " '{print $1,$15}' to get first and 15th arguments. ... (3 Replies)
Discussion started by: usha rao
3 Replies
Login or Register to Ask a Question